Special-shaped lap joint structure for conductive connection of battery pack
By combining rigid and flexible non-conductive conductive connectors with a dovetail buckle structure, the problem of welding and locking flexibility of battery module conductive connectors is solved, achieving efficient material utilization and vibration resistance, and improving the stability and durability of the connection.
Patent Information
- Application Number
- CN202422957441.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-02
AI Technical Summary
Existing battery module conductive connectors have poor flexibility in welding and locking, and cannot effectively absorb assembly tolerances and vibration energy, resulting in high production risks and low material utilization.
The design combines rigid and flexible irregular conductive connectors, with dovetail joints for overlapping. It incorporates metal stamping, cutting, nickel plating, and polymer diffusion welding processes to form a weldable and lockable connection structure. RQ13-05X copper brazing paste is applied to the weld joints for induction heating welding.
It enables flexible connection of conductive connectors in battery modules, improves material utilization, reduces production costs, enhances vibration resistance, extends service life, and improves connection stability and reliability.
Smart Images
Figure CN223638639U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of electronic engineering, more specifically, relate to a kind of for battery pack electrically conductive connection special-shaped lap joint structure. BACKGROUND
[0002] Currently, the electrically conductive connectors in battery modules of consumer electronic products can be classified into two categories: hard connection and soft connection.
[0003] The common structure of hard connection is as follows: a hard copper plate is stamped into a designed structure by a hardware die, and the surface treatment method is nickel plating (electrolytic plating or chemical plating). The common structure of soft connection is as follows: a 0.1 mm thick copper foil (coiled material) is cut into a designed length by a cutting device, and multiple layers are stacked to a designed thickness. A 0.1 mm thick nickel foil is attached to the surface locking position and exposed area, and the layers are combined (copper layer and copper layer, or copper layer and nickel layer) after welding by a high polymer diffusion welding device. The two types of products are selected according to the required functions. For example, if PCB welding is involved, the hard connection structure is selected. If only the locking method is required for electrically conductive connection, the soft connection structure is selected.
[0004] Currently, there is a need for one end of the electrically conductive connector to be welded and the other end to be locked during the design of the battery module of consumer electronic products. However, the existing two types of product structures cannot perfectly achieve this function. The hard connection can achieve one end welding and the other end locking, but it is fixed in structure and lacks flexibility, cannot absorb assembly tolerances and daily use vibration energy, and brings high risk to battery module production and product quality. The soft copper bar can satisfy the locking and assembly tolerance, and can absorb daily vibration energy, but the welding performance is poor, and virtual welding or delamination may occur during production, resulting in a decrease in production yield. From the structure, whether it is hard connection or soft connection, the material utilization rate is low when producing electrically conductive connectors with special shapes (such as L-shaped), resulting in an increase in the cost of electrically conductive connectors.
[0005] Therefore, the utility model is proposed. CONTENT OF THE UTILITY MODEL
[0006] To solve the technical problem of poor flexibility of the electrically conductive connector, the basic concept of the technical solution of the utility model is as follows:
[0007] A special-shaped lap joint structure for electrically conductive connection of a battery pack includes:
[0008] A hard special-shaped structure electrically conductive connector is formed by stamping a hardware die;
[0009] The connecting structure comprises a first connecting part and a second connecting part, the first connecting part comprises a first dovetail clamping plate fixedly installed at one end of the hard profile structure conductive connecting piece, and the first connecting part further comprises a second dovetail clamping plate fixedly installed at one end of the soft profile structure conductive connecting piece, the second dovetail clamping plate is internally provided with a dovetail clamping plate groove, and the second connecting part comprises a locking hole provided in the soft profile structure conductive connecting piece.
[0010] As a preferred embodiment of the utility model, the first dovetail clamping plate is clamped and installed in the interior of the dovetail clamping plate groove, and the outer wall of the first dovetail clamping plate is tightly attached to the inner wall of the dovetail clamping plate groove.
[0011] As a preferred embodiment of the utility model, the hard profile structure conductive connecting piece is formed into a semi-finished product state through a hardware stamping die, is subjected to nickel plating treatment on the surface, and the bent soft profile structure conductive connecting piece can form a plurality of groups of soft connection bending.
[0012] As a preferred embodiment of the utility model, the soft profile structure conductive connecting piece uses a copper foil (coiled material) with a thickness of 0.1 mm, is cut to a designed length through a cutting device, and is stacked in multiple layers to a designed thickness.
[0013] As a preferred embodiment of the utility model, a nickel foil with a thickness of 0.1 mm is attached to the surface layer locking position and the exposed area of the soft profile structure conductive connecting piece, and the soft profile structure conductive connecting piece is welded through a high polymer diffusion welding device.
[0014] As a preferred embodiment of the utility model, the soft profile structure conductive connecting piece is punched through a hardware stamping die to remove the excess welding material, the locking hole position, the soft and hard lap joint butt welding area dovetail clamping structure.
[0015] As a preferred embodiment of the utility model, the hard profile structure conductive connecting piece and the soft profile structure conductive connecting piece are overlapped through the dovetail clamping structure, the surface layer is smeared with RQ-X copper brazing paste, and the hard profile structure conductive connecting piece and the soft profile structure conductive connecting piece are formed through an induction heating welding machine.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] 1. The purpose of lap joint installation of the hard profile structure conductive connecting piece and the soft profile structure conductive connecting piece is achieved, the device is quickly connected through the structure of the dovetail clamping, the battery module conductive design of one end welding and the other end locking can be met, under the same structure, more than 70% of materials can be saved by adopting the electrically connected profile lap joint butt welding product, and the soft and hard butt joint mode can form a more complex structure compared with the hard connection.
[0018] 2. Reach the purpose of spraying protection to the connection of hard special-shaped structure conductive connector and soft special-shaped structure conductive connector, for special-shaped (such as L-shaped) structure conductive connector, can improve the material utilization rate, the soft connection part can continuously fold out multiple bending angles and angles, can reduce the difficulty of installation in the complex and compact battery module, can also effectively absorb the vibration energy brought by daily use.
[0019] 3. After lap joint, the surface is smeared with RQ13-05X copper brazing paste, the splicing welding effect of the device is improved, the hard special-shaped structure conductive connector and the soft special-shaped structure conductive connector are spliced and welded by the heating welding machine, the stability of the device connection is improved, the service life of the device is prolonged, and the durability of the device is improved.
[0020] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0021] In the drawings:
[0022] Figure 1 It is a front view of the present application;
[0023] Figure 2 It is a structural schematic view of the present application;
[0024] Figure 3 It is a structural schematic view of the hard special-shaped structure conductive connector of the present application;
[0025] Figure 4 It is a top view of the soft special-shaped structure conductive connector of the present application;
[0026] Figure 5 It is a structural schematic view of the soft special-shaped structure conductive connector of the present application;
[0027] Figure 6 It is a schematic view of the locking hole structure of the present application.
[0028] In the drawings: 10, hard special-shaped structure conductive connector; 11, soft special-shaped structure conductive connector; 12, first dovetail buckle plate; 13, second dovetail buckle plate; 14, dovetail buckle plate groove; 15, locking hole; 16, soft connection bending. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and the following embodiments are used to illustrate the present application.
[0030] Embodiment one: a special-shaped lap joint structure for battery pack conductive connection, specifically as Figure 1 and Figure 2As shown, it comprises a hard profile structure conductive connecting piece 10 formed by metal stamping, a connecting structure comprising a first connecting part and a second connecting part, the first connecting part comprising a first dovetail clamping plate 12 fixedly installed at one end of the hard profile structure conductive connecting piece 10, and the first connecting part further comprising a second dovetail clamping plate 13 fixedly installed at one end of the soft profile structure conductive connecting piece 11, and the second dovetail clamping plate 13 has a dovetail clamping plate slot 14 formed in the interior thereof, and the second connecting part comprises a locking hole 15 formed in the interior of the soft profile structure conductive connecting piece 11.
[0031] As shown in detail Figure 1 , Figure 2 , Figure 3 and Figure 5 , the first dovetail clamping plate 12 is clamped and installed in the interior of the dovetail clamping plate slot 14, and the outer wall of the first dovetail clamping plate 12 is tightly attached to the inner wall of the dovetail clamping plate slot 14. The first dovetail clamping plate 12 is clamped and installed in the interior of the dovetail clamping plate slot 14, and the hard profile structure conductive connecting piece 10 and the soft profile structure conductive connecting piece 11 are overlapped.
[0032] According to the above, through the structure of the hard profile structure conductive connecting piece 10, the soft profile structure conductive connecting piece 11, the first dovetail clamping plate 12, the second dovetail clamping plate 13, the dovetail clamping plate slot 14 and the locking hole 15, the purpose of overlapping and installing the hard profile structure conductive connecting piece 10 and the soft profile structure conductive connecting piece 11 is achieved, the device is quickly connected through the structure of the dovetail, and the battery module conductive design of one end welding and the other end locking can be met. Under the same structure, the use of electrically connected profile overlapping and stitch-welding products can save more than 70% of materials, and the use of soft and hard splicing can form more complex structures compared with hard connection.
[0033] Example Two: Based on Example One, as shown in detail Figure 1 , Figure 4 , Figure 5 and Figure 6 , the hard profile structure conductive connecting piece 10 is formed into a semi-finished state by metal stamping mold, the surface is treated with nickel plating, and the curved soft profile structure conductive connecting piece 11 can form multiple groups of soft connection bending 16.
[0034] As shown in detail Figure 1 and Figure 2 , the soft profile structure conductive connecting piece 11 uses 0.1 mm thick copper foil (roll stock) which is cut to the designed length by cutting equipment, and is stacked in multiple layers to the designed thickness.
[0035] As shown in detail Figure 1 and Figure 2 , a 0.1 mm thick nickel foil is attached to the surface layer locking position and the exposed area of the soft profile structure conductive connecting piece 11, and is welded by high polymer diffusion welding equipment.
[0036] Specifically as Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 and Figure 6 shown, the soft profile structure conductive connecting piece 11 is punched by a hardware stamping die to remove excess welding material, lock the hole position, and the dovetail buckle structure of the soft and hard overlap welding area.
[0037] According to the above, through the structure of the hard profile structure conductive connecting piece 10 and the soft profile structure conductive connecting piece 11, the purpose of spraying protection at the connection of the hard profile structure conductive connecting piece 10 and the soft profile structure conductive connecting piece 11 is achieved. For profile (such as L-shaped) structure conductive connecting piece, the material utilization rate can be improved, the soft connection part can continuously fold out multiple bend angles and angles, the difficulty of installation in a complex and compact battery module can be reduced, and the vibration energy brought about by daily use can also be effectively absorbed.
[0038] Example three: on the basis of example one and example two, specifically as Figure 1 and Figure 2 shown, the hard profile structure conductive connecting piece 10 and the soft profile structure conductive connecting piece 11 are overlapped by the dovetail buckle structure, the surface is smeared with RQ13-05X copper brazing paste, and the welding is completed by an induction heating welding machine. The hard profile structure conductive connecting piece 10 and the soft profile structure conductive connecting piece 11 are overlapped by the dovetail buckle structure, and the surface is smeared with RQ13-05X copper brazing paste.
[0039] In summary, through the structure of the hard profile structure conductive connecting piece 10 and the soft profile structure conductive connecting piece 11, the surface is smeared with RQ13-05X copper brazing paste after overlapping, the welding effect of the device is improved, the hard profile structure conductive connecting piece 10 and the soft profile structure conductive connecting piece 11 are conveniently welded by a heating welding machine, the stability of the device connection is improved, the service life of the device is prolonged, and the durability of the device is improved.
[0040] Working principle: hard profile structure conductive connecting piece 10 is formed by hardware die stamping, has high strength and good conductivity. The surface is treated by nickel plating, which not only improves the corrosion resistance, but also enhances the reliability of the conductive connection. Soft profile structure conductive connecting piece 11, 0.1mm thick copper foil (roll material) is stacked to the designed thickness, which increases the flexibility and conductive area of the connecting piece. The surface layer and locking position of the copper foil is covered with 0.1mm thick nickel foil, which is welded by high polymer diffusion welding equipment, ensuring the firmness and conductivity of the connection. It includes the first dovetail buckle plate 12 fixedly installed at one end of the hard profile structure conductive connecting piece 10, which allows precise butt joint with the second dovetail buckle plate 13 of the second connecting part. The second dovetail buckle plate 13 is provided with a dovetail buckle plate groove 14, which forms a clamping relationship with the first dovetail buckle plate 12. When the two are clamped, the outer wall and the inner wall are tightly attached, ensuring the tightness and stability of the connection. The hard profile structure conductive connecting piece 10 and the soft profile structure conductive connecting piece 11 are both preliminarily formed by hardware stamping die, which improves the production efficiency and ensures the accuracy of the shape. The soft profile structure conductive connecting piece 11 is cut to the designed length by cutting equipment and stacked to the required thickness in multiple layers to meet the requirements of conductivity and strength. The copper foil and nickel foil are welded by high polymer diffusion welding equipment, and the excess material is punched by hardware stamping die to form precise locking hole position and dovetail buckle structure. The hard profile structure conductive connecting piece 10 and the soft profile structure conductive connecting piece 11 are overlapped by the dovetail buckle structure, then RQ13-05X copper brazing paste is applied at the overlapping place, and induction heating welding machine is used for splicing. This step ensures reliable connection between the two and maintains good conductivity. The entire connection structure is subjected to appropriate surface treatment, such as nickel plating, to improve its corrosion resistance and aesthetics.
[0041] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.
Claims
1. A special-shaped lap joint structure for electrically conductive connection of a battery pack, characterized by, The utility model relates to a kind of hard profile structure conductive connecting piece (10), hard profile structure conductive connecting piece (10) is formed by hardware die stamping; Connecting structure, the connecting structure includes first connecting part and second connecting part, the first connecting part includes the first dovetail plate (12) fixedly installed at one end of hard profile structure conductive connecting piece (10), the first connecting part further includes the second dovetail plate (13) fixedly installed at one end of soft profile structure conductive connecting piece (11), the inside of second dovetail plate (13) is provided with dovetail plate slot (14), and the second connecting part includes lock joint hole (15) provided in the inside of soft profile structure conductive connecting piece (11). The first dovetail plate (12) is clamped and installed in the inside of dovetail plate slot (14), and the outer wall of first dovetail plate (12) is tightly attached to the inner wall of dovetail plate slot (14).
2. The battery pack electrically conductive connection irregular shaped lap joint structure of claim 1, wherein, The hard profile structure conductive connecting piece (10) is formed to semi-finished state by hardware stamping die, surface nickel plating treatment, and bending soft profile structure conductive connecting piece (11) can form multiple groups of soft connection bending (16).
3. The battery pack electrically conductive connection irregular shaped lap joint structure of claim 1, wherein, The soft profile structure conductive connecting piece (11) is cut to design length by cutting equipment using 0.1 millimeter thick copper foil, and is stacked to design thickness in multiple layers.
4. The battery pack electrically conductive connection irregular shaped lap joint structure of claim 1, wherein, 0.1 millimeter thickness nickel foil is attached to surface layer lock joint position and exposed area of the soft profile structure conductive connecting piece (11), and is welded by high polymer diffusion welding equipment.
5. The battery pack electrically conductive connection irregular shaped lap joint structure of claim 1, wherein, The soft profile structure conductive connecting piece (11) is punched by hardware stamping die, and the excess welding material, lock joint hole position, soft and hard lap joint butt welding area dovetail buckle structure.
6. The battery pack electrically conductive connection irregular shaped lap joint structure of claim 1, wherein, 7. The profile lap joint structure for battery pack conductive connection according to claim 1, The hard profile structure conductive connecting piece (10) and the soft profile structure conductive connecting piece (11) are coated with RQ13-05X copper brazing paste after lap joint by dovetail buckle structure, and are butt welded by induction heating welding machine. characterized in that