Energy storage battery module structure facilitating laser welding alignment operation
By setting positioning holes and alignment holes on the cells and connecting pieces, and using a V-shaped elastic telescopic buffer, the problem of difficult laser welding alignment in energy storage battery modules is solved, achieving efficient welding and structural compactness, and reducing processing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HONCELL ENERGY CO LTD
- Filing Date
- 2025-08-02
- Publication Date
- 2026-07-28
AI Technical Summary
The laser welding of connecting pieces in existing energy storage battery modules is difficult to align, which affects the reliability of the welding.
Positioning holes and alignment holes are respectively set on the center of the electrode post and the connecting part of the connecting piece of the battery cell. The positioning holes and alignment holes are welded and fixed by the positional correspondence of the positioning holes and alignment holes. The connecting piece adopts a V-shaped elastic telescopic buffer part to adapt to the connection requirements of different battery cells.
It simplifies the alignment process of laser welding, improves welding reliability, reduces processing costs, and enhances the applicability and space utilization of the structure.
Smart Images
Figure CN224570316U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy storage battery technology, specifically to an energy storage battery module structure that facilitates laser welding alignment. Background Technology
[0002] In energy storage battery modules, connectors play a crucial role in connecting and conducting current within the battery pack. Energy storage battery packs typically consist of multiple individual battery cells, and connectors are used to connect these cells to form the overall battery pack. Connectors are usually made of a highly conductive metal to ensure efficient current transfer between the battery cells.
[0003] The design and quality of the connectors directly affect the performance and safety of the battery pack. Connectors need sufficient conductivity to reduce resistance, energy loss, and heat generation. Simultaneously, they must possess sufficient mechanical strength and stability to ensure they do not loosen or break during battery pack operation, thus guaranteeing the stability and reliability of the battery pack.
[0004] Chinese utility model patent CN204333293U discloses a battery connector, a battery pack, a battery module, and an electric vehicle. The connector includes two metal plates and a connecting portion connecting the two metal plates. The connecting portion includes a buffer portion with a sinusoidal shape and a starting portion connected to the metal plates. This connector facilitates the elimination of the influence of assembly tolerances during battery assembly and overcomes the energy impact caused by external vibrations during actual use, ensuring the reliability of the connector connection and reducing manufacturing costs.
[0005] However, in actual use, both sides of the connecting part of the battery connector are flat metal sheets. To achieve the purpose of fixing the battery cells, corresponding fixing holes can be set on the metal sheets according to the shape, size, and number of the matching battery cells. However, because the surface of the metal sheet is flat and the area of the fixing holes is relatively large, it will cause great difficulty in laser welding during the welding process between the connector and the battery, resulting in poor laser welding and seriously affecting the reliability of the energy storage battery pack. Utility Model Content
[0006] The purpose of this invention is to provide an energy storage battery module structure that facilitates laser welding alignment, featuring accurate positioning, simple processing, and strong applicability.
[0007] This utility model can be achieved through the following technical solutions:
[0008] This utility model provides an energy storage battery module structure that facilitates laser welding alignment. It includes several battery cells and connecting plates. The battery cells are connected and formed by the connecting plates. The connecting plates have connecting parts at both ends and a buffer part between the two connecting parts. The battery cell has a positioning hole at the center of the terminal post, and the connecting part has an alignment hole corresponding to the positioning hole. The battery cell is fixed to both ends of the connecting plate by welding according to the positional correspondence between the positioning hole and the alignment hole.
[0009] Furthermore, the buffer section is a V-shaped elastic telescopic buffer section, which is recessed or convex on the connecting piece. By setting the V-shaped elastic telescopic buffer section, the angle can be flexibly adjusted according to the size of the battery cell to meet the connection requirements of different types of battery cells.
[0010] Furthermore, the connecting parts at both ends of the buffer section are arranged in a mirror symmetrical manner, thereby ensuring that the cells inside the energy storage battery module are regularly connected and the structure is compact.
[0011] Furthermore, the connection parts at both ends of the buffer section are at the same or staggered heights, which can meet the connection requirements of cells of different heights and make full use of the internal space of the energy storage battery module.
[0012] Furthermore, the connecting pieces can be made of aluminum, copper, or nickel, and can be flexibly selected as needed, taking into account conductivity, thermal conductivity, and cost.
[0013] Furthermore, the connecting piece is a one-piece stamped structure, which is easy to process and ensures the reliability of the structure.
[0014] Furthermore, the angle of the V-shaped elastic telescopic buffer section varies from 0 to 180°, and the thickness of the connecting piece is 1 to 5 mm, which has high dimensional applicability.
[0015] Furthermore, the battery cell is a secondary battery cell, and the secondary battery can be a lithium-ion battery or a sodium-ion battery, which can be flexibly selected according to actual needs.
[0016] Furthermore, the lithium-ion battery can be a lithium manganese oxide battery, a lithium cobalt oxide battery, a ternary material battery, or a lithium iron phosphate battery, which can be flexibly selected according to actual needs.
[0017] Furthermore, this sodium-ion battery is a polyanion battery, a layered oxide battery, or a Prussian blue battery.
[0018] This utility model discloses an energy storage battery module structure that facilitates laser welding alignment, and has the following beneficial effects:
[0019] First, the positioning is accurate. By setting positioning holes and alignment holes at the center of the cell column and on the connecting part of the connecting piece, the positioning difficulty of laser welding is effectively simplified, the positioning accuracy is higher, and the reliability of battery module welding is effectively improved.
[0020] Secondly, the processing is simple. By setting positioning holes and alignment holes at the center of the cell column and on the connecting part of the connecting piece, there is no need to consider the influence of factors such as the shape and size of the cell to set specific fixing holes. Only a simple drilling operation is required during the processing. The whole processing process is simple and easy to carry out, and the cost is low.
[0021] Third, it has strong applicability. By setting positioning holes and alignment holes at the center of the cell column and on the connecting part of the connecting piece, there is no need to consider the influence of factors such as cell shape and size to set specific fixing holes, nor is there any need for additional structural design. It fully integrates the internal space of the energy storage battery module and meets the universality of the internal structure of the energy storage battery module. Attached Figure Description
[0022] Appendix Figure 1 This is a schematic diagram of the cell structure of an energy storage battery module structure that facilitates laser welding alignment according to this utility model.
[0023] Appendix Figure 2 This is a schematic diagram of the connecting piece structure of an energy storage battery module structure that facilitates laser welding alignment according to this utility model.
[0024] Appendix Figure 3 This is a schematic diagram of the assembly piece structure of an energy storage battery module that facilitates laser welding alignment according to this utility model.
[0025] The markings in the attached figures include: 100, battery cell; 110, terminal post; 111, positioning hole; 200, connecting piece; 210, connecting part; 211, alignment hole; 220, buffer part. Detailed Implementation
[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the product of this utility model will be further described in detail below with reference to embodiments.
[0027] like Figures 1-3As shown, the present invention provides an energy storage battery module structure that facilitates laser welding alignment. It includes several battery cells 100 and connecting pieces 200. The several battery cells 100 are connected and formed by the connecting pieces 200. The connecting pieces 200 have connecting portions 210 at both ends and a buffer portion 220 between the two connecting portions 210. The terminal post 110 of the battery cell 100 has a positioning hole 111 at its center. The connecting portion 210 has an alignment hole 211 corresponding to the positioning hole 111. The battery cell 100 is fixed to both ends of the connecting piece 200 by welding through the positional correspondence between the positioning hole 111 and the alignment hole 211.
[0028] like Figure 2 As shown, the buffer part 200 is a V-shaped elastic telescopic buffer part, which is recessed or convex on the connecting piece. Specifically, the angle of the V-shaped elastic telescopic buffer part varies from 0 to 180°, and the thickness of the connecting piece is 1 to 5 mm.
[0029] To effectively ensure the compact structure of the energy storage battery module, the connecting parts at both ends of the buffer section are arranged in a mirror-symmetrical manner.
[0030] To make full use of the internal space of the energy storage battery module, the connecting parts at both ends of the buffer section are at the same height or staggered.
[0031] To effectively ensure the electrical and thermal conductivity of the connecting piece, the connecting piece is made of aluminum, copper, or nickel.
[0032] To ensure the reliability of the energy storage battery module, the connecting piece is a one-piece stamped structure.
[0033] The structure of this utility model has good applicability. The battery cell is a secondary battery cell, and the secondary battery is a lithium-ion battery or a sodium-ion battery. For example, the lithium-ion battery can be a lithium manganese oxide battery, a lithium cobalt oxide battery, a ternary material battery, or a lithium iron phosphate battery; the sodium-ion battery can be a polyanion battery, a layered oxide material battery, or a Prussian blue material battery. The specific choice can be flexibly made according to actual needs.
[0034] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] The above embodiments are merely specific examples of this utility model, and their descriptions are quite specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.
Claims
1. A storage battery module structure for easy laser welding alignment, comprising a plurality of battery cells and connecting plates, wherein the plurality of battery cells are connected and formed by the connecting plates, wherein the connecting plates have connecting portions at both ends and a buffer portion is formed between the two connecting portions, characterized in that: The battery cell has a positioning hole at the center of the electrode post, and the connecting part has an alignment hole corresponding to the positioning hole. The battery cell is fixed to both ends of the connecting piece by welding according to the positional correspondence between the positioning hole and the alignment hole.
2. The energy storage battery module structure according to claim 1, which facilitates laser welding alignment, is characterized in that: The buffer part is a V-shaped elastic telescopic buffer part, which is recessed or convex on the connecting piece.
3. The energy storage battery module structure according to claim 2, which facilitates laser welding alignment, is characterized in that: The connecting parts at both ends of the buffer section are arranged in a mirror-symmetric manner.
4. The energy storage battery module structure according to claim 2, which facilitates laser welding alignment, is characterized in that: The connecting parts at both ends of the buffer section are at the same height or staggered.
5. The energy storage battery module structure according to claim 3 or 4, which facilitates laser welding alignment, is characterized in that: The connecting piece is an aluminum connecting piece, a copper connecting piece, or a nickel connecting piece.
6. The energy storage battery module structure according to claim 5, which facilitates laser welding alignment, is characterized in that: The connecting piece is a one-piece stamped structure.
7. The energy storage battery module structure according to claim 6, which facilitates laser welding alignment, is characterized in that: The angle of the V-shaped elastic telescopic buffer part varies from 0 to 180°, and the thickness of the connecting piece is 1 to 5 mm.
8. The energy storage battery module structure according to claim 7, which facilitates laser welding alignment, is characterized in that: The battery cell is a secondary battery cell, and the secondary battery is either a lithium-ion battery or a sodium-ion battery.
9. The energy storage battery module structure according to claim 8, which facilitates laser welding alignment, is characterized in that: The lithium-ion battery is a lithium manganese oxide battery, a lithium cobalt oxide battery, a ternary material battery, or a lithium iron phosphate battery.
10. The energy storage battery module structure according to claim 8, which facilitates laser welding alignment, is characterized in that: The sodium-ion battery is a polyanion battery, a layered oxide battery, or a Prussian blue battery.