Copper-nickel composite structure and battery module

Abstract

The utility model relates to a copper-nickel composite structure. The copper-nickel composite structure comprises a copper bar and a nickel plate abutting against the copper bar. The copper bar comprises a copper bar plate and a copper bar connecting part which are integrally arranged; a plurality of circular punched holes are formed in the copper bar plate; the plurality of circular punched holes are arranged at equal intervals; a plurality of similar I-shaped punched holes are formed in the nickel sheet plate, and the plurality of similar I-shaped punched holes are arranged at equal intervals; the I-shaped punching holes and the circular punching holes are in one-to-one correspondence and butt joint to form welding parts welded with the battery cell; and the I-shaped punching hole and the circular punching hole are arranged in a matched manner. The utility model further provides a battery module. The battery module comprises the copper-nickel composite structure. Through the structure, the stability of the welded busbar can be effectively improved, the welding time is saved, the production efficiency is improved, only one-time positioning is needed, and the machining cost of the nickel plate is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a copper-nickel composite structure and battery module. Background Technology

[0002] With the development of technology, power batteries have received increasing attention as an energy device and have been widely used in mobile phones, electric vehicles, power tools and other fields.

[0003] In existing energy storage battery structures, when the length of the cells is inconsistent or inaccurate, the deviation in module length can be significant, leading to deformation of the nickel sheets due to compression, and even posing a risk of nickel sheet detachment. Furthermore, existing nickel sheets are generally processed into a U-shaped stamped shape, resulting in high processing costs. After processing, each nickel sheet needs to be individually welded to a copper busbar, requiring repeated positioning after each weld, which is time-consuming. Therefore, existing nickel sheets have strict requirements on the length of the cells; excessive deviations in cell dimensions can cause nickel sheet deformation due to compression, affecting the stability of the nickel sheet welding and posing a risk of detachment. The method of welding individual nickel sheets also affects processing efficiency and is not conducive to mass production. Utility Model Content

[0004] Based on this, the present invention provides a copper-nickel composite structure and battery module, aiming to solve the problems of existing nickel sheets having high requirements for the length of the battery cell, poor welding stability, complex processing and positioning, low processing efficiency, and being unfavorable for mass production.

[0005] To achieve the above objectives, on the one hand, the present invention proposes the following technical solution: a copper-nickel composite structure, comprising a copper busbar and a nickel sheet plate disposed in contact with the copper busbar;

[0006] The copper busbar includes an integrally formed copper busbar plate and a copper busbar connecting part; the copper busbar plate is provided with a plurality of circular punches; the plurality of circular punches are arranged at equal intervals.

[0007] The nickel sheet is provided with a plurality of I-shaped punches, which are equally spaced; the I-shaped punches and the circular punches correspond one-to-one and abut against each other to form a welding part for welding to the battery cell; the I-shaped punches and the circular punches are adapted to each other.

[0008] In a preferred embodiment, the I-shaped punch includes an integrally formed first horizontal portion, a connecting portion, and a second horizontal portion; one end of the connecting portion is connected to the first horizontal portion, and the other end is connected to the second horizontal portion; the length of the connecting portion is less than the diameter of the circular punch.

[0009] In a preferred embodiment, the length of the first horizontal portion is equal to the length of the second horizontal portion; the two ends of the first horizontal portion and the two ends of the second horizontal portion are respectively abutted against the edge of the circular punch.

[0010] In a preferred embodiment, the plurality of circular punches are arranged in multiple rows along the longitudinal direction of the copper busbar, and the distance between two adjacent rows of circular punches is equal.

[0011] Along the transverse direction of the copper busbar, a plurality of circular punches are arranged in multiple rows, with the distance between two adjacent rows of circular punches being equal.

[0012] In a preferred embodiment, along the longitudinal direction of the nickel sheet, a plurality of the I-shaped perforations are arranged in multiple rows, and the distance between two adjacent rows of the I-shaped perforations is equal.

[0013] Along the transverse direction of the nickel sheet, multiple I-shaped perforations are arranged in multiple rows, with equal distances between adjacent rows of I-shaped perforations.

[0014] In a preferred embodiment, the copper busbar plate is arranged perpendicularly to the copper busbar connecting part; the copper busbar connecting part is provided with a plurality of press-fit screw holes; and each of the press-fit screw holes is provided with a press-fit nut.

[0015] In a preferred embodiment, the number of rows of the press-fit screw holes corresponds one-to-one with the number of rows of the circular punch holes; the press-fit screw holes correspond one-to-one with the press-fit nuts.

[0016] On the other hand, embodiments of this application also provide a battery module, the battery module including the copper-nickel composite structure.

[0017] In a preferred embodiment, the battery module includes a first end plate, a second end plate, a first copper-nickel composite structure, a second copper-nickel composite structure, a first housing, a second housing, a cell module, and several screws; the first end plate, the first copper-nickel composite structure, the first housing, the cell module, the second housing, the second copper-nickel composite structure, and the second end plate are stacked sequentially; the screws sequentially pass through the first end plate, the first copper-nickel composite structure, the first housing, the second housing, the second copper-nickel composite structure, and the second end plate, and one end of the screw is fixedly connected to the first end plate, and the other end is fixedly connected to the second end plate;

[0018] Both the first copper-nickel composite structure and the second copper-nickel composite structure are described above.

[0019] In a preferred embodiment, the first end plate and the second end plate are symmetrically arranged; the first copper-nickel composite structure and the second copper-nickel composite structure are symmetrically arranged; and the first plastic shell and the second plastic shell are symmetrically arranged.

[0020] In a preferred embodiment, the first copper-nickel composite structure and the second copper-nickel composite structure are respectively adapted to the battery cell module; the first housing and the second housing are respectively adapted to the battery cell module.

[0021] The beneficial effects achieved by this utility model are as follows: This application sets circular punches on the copper busbar and I-shaped punches on the nickel sheet, with each circular punch corresponding to one of the I-shaped punches as a busbar. The I-shaped punches abut against the circular punches to form a welding part for welding with the battery cell. With this structure, only one positioning is required when welding the copper busbar and nickel sheet together; individual positioning and welding of each nickel sheet are unnecessary. When welding the welding part to the battery cell, the nickel sheet will not be deformed due to length errors in the battery cell module, thus avoiding the risk of the nickel sheet detaching due to deformation. The processing technology of the nickel sheet is simpler, eliminating the need for processing into a U-shaped stamping shape. This structure effectively improves the stability of the busbar after welding, saves welding time, increases production efficiency, and significantly reduces the processing cost of the nickel sheet by requiring only one positioning. This application has a simple structure, involves fewer components, reduces usage costs, and has higher practicality and economy, making it suitable for production and use as a general-purpose product. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a copper-nickel composite structure according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the exploded structure of a copper-nickel composite structure;

[0025] Figure 3 This is a schematic diagram of the front structure of a battery module according to another embodiment of this application (with the first end plate and the second end plate removed);

[0026] Figure 4 for Figure 3 A partial structural diagram of the battery module;

[0027] Figure 5 For Figure 4 The schematic diagram of the explosion structure.

[0028] The purposes, functional features and advantages of the present application will be further described with reference to the accompanying drawings in conjunction with embodiments. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0030] It should be noted that if the present application embodiments involve directional indications (such as up, down, left, right, front, back, top, bottom, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directional indications will also change accordingly.

[0031] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] Specifically, such as Figures 1-2 As shown, on the one hand, the present utility model embodiment proposes the following technical solution: a copper-nickel composite structure, including a copper busbar 10 and a nickel sheet 20 that abuts against the copper busbar 10;

[0035] The copper busbar 10 includes an integrally formed copper busbar plate 11 and a copper busbar connecting part 12; the copper busbar plate 11 is provided with a plurality of circular punch holes 111; the plurality of circular punch holes 111 are equally spaced;

[0036] The nickel sheet 20 is provided with a plurality of I-shaped punch holes 21, which are equally spaced. The I-shaped punch holes 21 and the circular punch holes 111 correspond to each other to form a welding part for welding with the battery cell. The I-shaped punch holes 21 and the circular punch holes 111 are adapted to each other.

[0037] This application features circular punches on a copper busbar and I-shaped punches on a nickel sheet, with each circular punch corresponding to one of the I-shaped punches. This allows the I-shaped punches to abut against the circular punches, forming a welded section for bonding with the battery cell. Using this copper-nickel composite structure as a busbar eliminates the need for single-stage positioning during the welding of the copper busbar and nickel sheet, eliminating the need for individual nickel sheet positioning and welding. Furthermore, the nickel sheet is not deformed due to length errors in the battery cell module during welding, preventing the risk of detachment due to deformation. The processing of the nickel sheet is also simpler, eliminating the need for a U-shaped stamping process.

[0038] In a preferred embodiment, the I-shaped punch 21 includes an integrally formed first horizontal portion 211, a connecting portion 212, and a second horizontal portion 213; one end of the connecting portion 212 is connected to the first horizontal portion 211, and the other end is connected to the second horizontal portion 213; the length of the connecting portion 212 is less than the diameter of the circular punch 111.

[0039] In a preferred embodiment, the length of the first horizontal portion 211 is equal to the length of the second horizontal portion 213; the two ends of the first horizontal portion 211 and the two ends of the second horizontal portion 213 are respectively abutted against the edge of the circular punch 111.

[0040] In a preferred embodiment, along the longitudinal direction of the copper busbar 11, a plurality of circular punches 111 are arranged in multiple rows, and the distance between two adjacent rows of circular punches 111 is equal.

[0041] Along the transverse direction of the copper busbar 11, a plurality of circular punches 111 are arranged in multiple rows, with equal distances between adjacent rows of circular punches 111. The copper busbar is adapted to the nickel sheet, thus enabling the copper busbar to be adapted to the battery cell module, facilitating the fixed connection between the busbar and the battery cell module.

[0042] In a preferred embodiment, along the longitudinal direction of the nickel sheet 20, a plurality of I-shaped punches 21 are arranged in multiple rows, and the distance between two adjacent rows of I-shaped punches 21 is equal.

[0043] Along the transverse direction of the nickel sheet 20, multiple I-shaped perforations 21 are arranged in multiple rows, with equal distances between adjacent rows of I-shaped perforations 21. This arrangement allows the nickel sheet to be adapted to the battery cell module, facilitating the fixed connection between the busbar and the battery cell module.

[0044] In a preferred embodiment, the copper busbar plate 11 is perpendicular to the copper busbar connecting portion 12; the copper busbar connecting portion 12 is provided with a plurality of press-fit screw holes 121; and each of the press-fit screw holes 121 is provided with a press-fit nut 30. In this embodiment, the plurality of press-fit screw holes 121 are arranged at equal intervals, which can effectively ensure the stability of the fixation.

[0045] In a preferred embodiment, the number of rows of the press-fit screw holes 121 corresponds one-to-one with the number of rows of the circular punch holes 111; the press-fit screw holes 121 correspond one-to-one with the press-fit nuts 30.

[0046] On the other hand, such as Figures 3-5 As shown in the embodiment of this application, a battery module is also provided, the battery module including the copper-nickel composite structure.

[0047] As a preferred implementation, the battery module comprises a first end plate 100, a second end plate 200, a first copper-nickel composite structure 300, a second copper-nickel composite structure 400, a first glue shell 500, a second glue shell 600, a battery cell module 700 and a plurality of threaded rods 800; the first end plate 100, the first copper-nickel composite structure 300, the first glue shell 500, the battery cell module 700, the second glue shell 600, the second copper-nickel composite structure 400 and the second end plate 200 are sequentially stacked; the threaded rods 800 sequentially pass through the first end plate 100, the first copper-nickel composite structure 300, the first glue shell 500, the second glue shell 600, the second copper-nickel composite structure 400 and the second end plate 200, and one end of the threaded rods 800 is fixedly connected with the first end plate 100, and the other end is fixedly connected with the second end plate 200.

[0048] The first copper-nickel composite structure 300 and the second copper-nickel composite structure 400 are both copper-nickel composite structures.

[0049] As a preferred implementation, the first end plate 100 and the second end plate 200 are symmetrically arranged; the first copper-nickel composite structure 300 and the second copper-nickel composite structure 400 are symmetrically arranged; the first glue shell 500 and the second glue shell 600 are symmetrically arranged.

[0050] As a preferred implementation, the first copper-nickel composite structure 300 and the second copper-nickel composite structure 400 are respectively arranged in adaptation with the battery cell module 700; the first glue shell 500 and the second glue shell 600 are respectively arranged in adaptation with the battery cell module 700. The battery cell module is effectively locked by cooperation of the threaded rods and the first end plate and the second end plate, the first glue shell and the second glue shell can effectively fix the battery cell module, and the module structure is effectively fixed.

[0051] Through the structure of the present application, the stability of the busbar after welding can be effectively improved, the welding working hours are saved, the production efficiency is improved, only one positioning is needed, the processing cost of the nickel sheet plate is greatly reduced. The structure of the present application is simple, involves few parts, reduces the use cost, has higher practicability and economy, and can be produced and used as a general product.

[0052] In the description of the present application, the description of the terms "an embodiment", "an example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0053] 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.

[0054] The above only describes the preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the contents of the drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A copper-nickel composite structure, characterized by, Includes a copper busbar and a nickel plate that abuts against the copper busbar; The copper busbar includes an integrally formed copper busbar plate and a copper busbar connecting part; the copper busbar plate is provided with a plurality of circular punches; the plurality of circular punches are arranged at equal intervals. The nickel sheet is provided with a plurality of I-shaped punches, which are equally spaced; the I-shaped punches and the circular punches correspond one-to-one and abut against each other to form a welding part for welding with the battery cell; the I-shaped punches and the circular punches are adapted to each other.

2. The copper-nickel composite structure of claim 1, wherein, The I-shaped punch includes an integrally formed first horizontal part, a connecting part, and a second horizontal part; one end of the connecting part is connected to the first horizontal part, and the other end is connected to the second horizontal part; the length of the connecting part is less than the diameter of the circular punch.

3. The copper-nickel composite structure of claim 2, wherein, The length of the first horizontal section is equal to the length of the second horizontal section; the two ends of the first horizontal section and the two ends of the second horizontal section are respectively abutted against the edge of the circular punch.

4. The copper-nickel composite structure of claim 1, wherein, Along the longitudinal direction of the copper busbar, a plurality of circular punches are arranged in multiple rows, and the distance between two adjacent rows of circular punches is equal. Along the transverse direction of the copper busbar, a plurality of circular punches are arranged in multiple rows, with the distance between two adjacent rows of circular punches being equal.

5. The copper-nickel composite structure of claim 1, wherein, Along the longitudinal direction of the nickel sheet, multiple I-shaped punches are arranged in multiple rows, and the distance between two adjacent rows of I-shaped punches is equal. Along the transverse direction of the nickel sheet, multiple I-shaped perforations are arranged in multiple rows, with equal distances between adjacent rows of I-shaped perforations.

6. The copper-nickel composite structure of claim 1, wherein, The copper busbar plate is perpendicular to the copper busbar connecting part; the copper busbar connecting part is provided with a plurality of press-fit screw holes; each of the press-fit screw holes is provided with a press-fit nut; The number of rows of the press-fit screw holes corresponds one-to-one with the number of rows of the circular punch holes; the number of press-fit screw holes corresponds one-to-one with the number of press-fit nuts.

7. A battery module, characterized by The battery module includes the copper-nickel composite structure as described in any one of claims 1 to 6.

8. The battery module of claim 7, wherein, The battery module includes a first end plate, a second end plate, a first copper-nickel composite structure, a second copper-nickel composite structure, a first housing, a second housing, a cell module, and several screws. The first end plate, the first copper-nickel composite structure, the first housing, the cell module, the second housing, the second copper-nickel composite structure, and the second end plate are stacked sequentially. The screws pass through the first end plate, the first copper-nickel composite structure, the first housing, the second housing, the second copper-nickel composite structure, and the second end plate sequentially, with one end of the screw fixedly connected to the first end plate and the other end fixedly connected to the second end plate. Both the first copper-nickel composite structure and the second copper-nickel composite structure are copper-nickel composite structures.

9. The battery module of claim 8, wherein, The first end plate and the second end plate are symmetrically arranged; the first copper-nickel composite structure and the second copper-nickel composite structure are symmetrically arranged; the first plastic shell and the second plastic shell are symmetrically arranged.

10. The battery module of claim 8, wherein, The first copper-nickel composite structure and the second copper-nickel composite structure are respectively arranged in adaptation with the battery cell module; the first glue shell and the second glue shell are respectively arranged in adaptation with the battery cell module.

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