Battery structure welded by aluminum wires and two-wheeled electric vehicle
The battery structure, which uses aluminum wire welding and a bracket for separation, solves the problems of heat spread and high cost of lithium-ion power batteries in two-wheeled electric vehicles, and improves both safety and economy.
Patent Information
- Application Number
- CN202423076403.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Lithium-ion batteries in two-wheeled electric vehicles suffer from rapid heat spread and high costs, and existing liquid cooling systems are not suitable, leading to safety hazards and high costs.
The battery structure uses aluminum wire welding, with the cells connected in series by aluminum wire and the protection board module and cell module separated by a bracket. The combination of potting compound and waterproof adhesive improves safety and waterproof performance.
It slows down heat spread, reduces the risk and cost of battery fire, and facilitates the maintenance and replacement of the protection board module, thereby improving the safety and economy of the battery structure.
Smart Images
Figure CN223651590U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of batteries, and in particular to a battery structure using aluminum wire welding and a two-wheeled electric vehicle. Background Technology
[0002] With the development of new energy sources and the increasing promotion of environmentally friendly travel concepts, two-wheeled vehicles powered by lithium-ion batteries have become an increasingly popular choice for transportation. However, reports of safety incidents involving lithium-ion batteries have been frequent in recent years, making safety a crucial indicator for evaluating lithium battery performance. Currently, most battery cells are connected in series via a plate-like structure. Due to the large area of these plates, rapid heat propagation occurs during thermal runaway, leading to a rapid temperature rise in the battery structure. While battery packs in four-wheeled vehicles currently rely on liquid cooling systems for cooling, reducing the probability of battery fires is a critical technical challenge for two-wheeled electric vehicles, as these systems are not suitable for bulky liquid cooling systems. Furthermore, the plate-like series cell method is costly, contributing to the higher cost of two-wheeled electric vehicles.
[0003] Therefore, improvements to existing technologies are necessary.
[0004] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content
[0005] This utility model provides a battery structure and a two-wheeled electric vehicle using aluminum wire welding, mainly solving the technical problem of how to slow down the heat spread of the battery structure and reduce the cost of the battery structure.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A battery structure using aluminum wire welding includes a casing, a cell module, a docking plate, aluminum wire, a support base, a protection board module, and a cover plate.
[0008] The housing has an opening, and the battery cell module includes a battery cell housed within the housing through the opening. The support base is fixedly connected to the housing and covers the opening. The docking plate is fixedly connected to the housing and disposed between the battery cell module and the support base. Multiple aluminum wires are connected to the docking plate, and the multiple aluminum wires and the docking plate are connected in series with multiple battery cells. The side of the support base facing away from the docking plate has a receiving groove. The protection plate module is fixed in the receiving groove and electrically connected to the docking plate. The cover plate is fixedly connected to the support base and covers the opening of the receiving groove.
[0009] In one of the technical solutions, the docking plate includes a substrate and a plurality of conductive components fixed on the substrate. Each conductive component has an aluminum wire connected to both ends. The aluminum wire is connected to the positive or negative electrode of the battery cell. The conductive components are connected in series with two corresponding battery cells through the aluminum wire at their respective ends.
[0010] In one of the technical solutions, the docking plate integrates a data acquisition device, which is electrically connected to multiple conductive components and to the protection board module.
[0011] In one of the technical solutions, the housing is filled with potting compound, and the potting compound simultaneously bonds the housing, the battery cell module, and the docking plate.
[0012] In one of the technical solutions, a first waterproof adhesive ring is filled between the bracket and the housing at the opening.
[0013] In one of the technical solutions, a second waterproof adhesive ring is filled at the opening of the receiving groove between the cover plate and the bracket seat.
[0014] In one of the technical solutions, the battery cell is a cylindrical battery cell with a gap between adjacent battery cells. The housing has a first protrusion protruding in the gap toward the opening. The end of the first protrusion facing the opening is provided with a first internal thread. The mating plate is provided with a first through hole at the position corresponding to each of the first protrusions. A first bolt connected to the first internal thread passes through the first through hole.
[0015] In one of the technical solutions, the battery cell is a cylindrical battery cell with a gap between adjacent battery cells. The housing has a second protrusion protruding in the gap toward the opening. The end of the second protrusion facing the opening is provided with a second internal thread. The bracket seat is provided with a second through hole at the position corresponding to each of the second protrusions. A second bolt connected to the second internal thread passes through the second through hole.
[0016] In one of the technical solutions, the cover plate is made of fiberboard.
[0017] This application also provides a two-wheeled electric vehicle, including a two-wheeled vehicle body and the aforementioned battery structure welded with aluminum wire connected to the two-wheeled vehicle body.
[0018] Compared with the prior art, the battery structure using aluminum wire welding provided by this utility model has at least the following beneficial effects:
[0019] This solution utilizes an aluminum wire connection within a mating plate structure to connect multiple battery cells in series. Compared to traditional bulky battery sheets, aluminum wires are smaller and therefore less conductive, thus mitigating heat spread and reducing the risk of fire. Secondly, aluminum wires are less expensive than bulky battery sheets, reducing overall battery cost. This aluminum wire battery structure is well-suited for two-wheeled electric vehicles, reducing both the probability of fire and overall cost. Furthermore, the bracket separates the protection board module and the battery cell module, isolating heat from both and reducing the risk of thermal runaway or fire in the battery cell module, further enhancing battery safety. Moreover, maintenance or replacement of the protection board module can be performed simply by opening the cover, without disassembling the battery cell module, offering significant advantages for ease of maintenance and replacement.
[0020] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description
[0021] 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 these drawings without creative effort.
[0022] Figure 1 An exploded view of a battery structure using aluminum wire welding provided in this application embodiment when the casing is hidden;
[0023] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;
[0024] Figure 3 A cross-sectional view of a battery structure using aluminum wire welding provided in an embodiment of this application;
[0025] Figure 4 for Figure 3 A magnified view of a section at point B in the middle.
[0026] Figure label:
[0027] 1. Housing; 11. Opening; 2. Battery cell module; 21. Battery cell; 22. Gap; 3. Connecting plate; 31. Substrate; 32. Conductive component; 33. First through hole; 34. First bolt; 4. Aluminum wire; 5. Support base; 51. Receiving groove; 52. Second through hole; 53. Second bolt; 6. Protection plate module; 7. Cover plate; 8. Encapsulating adhesive; 9. First waterproof adhesive; 10. Second waterproof adhesive. Detailed Implementation
[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0030] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0031] 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 application, "multiple" means two or more, unless otherwise explicitly specified.
[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0033] Please refer to the following: Figures 1 to 4This utility model embodiment provides a battery structure using aluminum wire welding. The battery structure mainly includes a shell 1, a cell module 2, a docking plate 3, aluminum wires 4, a support base 5, a protection plate module 6, and a cover plate 7. The shell 1 has an opening 11, through which the cell module 2 is housed. The cell module 2 can be understood as including multiple cells 21 connected in series. The support base 5 is fixedly connected to the shell 1 and covers the opening 11 to prevent external substances from entering the shell 1. The docking plate 3 is fixedly connected to the shell 1 and positioned between the cell module 2 and the support base 5. Multiple aluminum wires 4 are welded to the docking plate 3, and the multiple aluminum wires 4, together with the docking plate 3, enable the multiple cells 21 to be connected in series. The support base 5 has a receiving groove 51 on the side facing away from the docking plate 3. The protection board module 6 is fixed in the receiving groove 51 and electrically connected to the docking plate 3. The protection board module 6 is indirectly connected to the positive and negative terminals of multiple battery cells 21 through the docking plate 3 to collect the voltage, current or temperature data of multiple battery cells 21. Then, based on the collected data information, the protection board module 2 is managed and protected to prevent problems such as overvoltage, overcurrent or overheating of the battery cell module 2. The protection board module 6 also provides a total positive terminal and a total negative terminal to facilitate charging or discharging of the battery cell module 2 through the protection board module 6. The cover plate 7 is made of fiberboard. The cover plate 7 is fixedly connected to the support base 5 and covers the opening of the receiving groove 51 to protect the internal protection board module 6.
[0034] Specifically, this solution utilizes aluminum wires 4 to connect multiple battery cells 21 in series within the structure of the application docking plate 3. Compared to traditional large battery plates, aluminum wires 4 are smaller and therefore less conductive, thus reducing the thermal spread efficiency of the battery structure and lowering the risk of fire, thereby improving battery safety. Secondly, aluminum wires 4 are less expensive than large battery plates, reducing the overall cost of the battery structure. Battery structures using aluminum wires 4 are well-suited for use in two-wheeled electric vehicles, helping to reduce the probability of fires and lowering costs. Furthermore, the bracket 5 separates the protection board module 6 from the battery cell module 2, isolating heat from both and reducing the risk of thermal runaway or even fire in the battery cell module 2, further enhancing battery safety. Moreover, this solution allows for maintenance or replacement of the protection board module 6 simply by opening the cover plate 7, without disassembling the battery cell module 2, offering the advantage of easy maintenance and replacement of the protection board module 6.
[0035] Please refer to the following: Figure 1 and Figure 2The docking plate 3 includes a base plate 31 and multiple conductive elements 32 fixed on the base plate 31. Each conductive element 32 has an aluminum wire 4 connected to both ends. The aluminum wire 4 is connected to the positive or negative terminal of the battery cell 21. Each conductive element 32 connects two corresponding battery cells 21 in series via the aluminum wire 4 at its respective end. In other words, for each conductive element 32, one end is connected to the positive terminal of one battery cell 21 via an aluminum wire 4, and the other end is connected to the negative terminal of another battery cell 21 via an aluminum wire 4, thus connecting two battery cells 21 in series through the conductive element 32 and the aluminum wire 4. By combining the conductive element 32 and the aluminum wire 4, the current-carrying area can be appropriately increased, improving the current-carrying capacity of the battery structure. Furthermore, it facilitates the lead-out of the positive or negative terminals of multiple battery cells 21 and their electrical connection to the protection board module 6. In fact, the docking plate 3 integrates a data acquisition device (not shown in the figure). The data acquisition device is electrically connected to multiple conductive parts 32, thereby achieving the purpose of leading out the positive and negative terminals of multiple battery cells 21. The data acquisition device is electrically connected to the protection board module 6 through a connector plug-in method, so that the protection board module 6 can be electrically connected to the positive and negative terminals of multiple battery cells 21 through the data acquisition device, thereby enabling the protection board module 6 to detect the voltage data, current data, and temperature data of multiple battery cells 21.
[0036] Please refer to the following: Figures 1 to 4 The casing 1 is filled with potting compound 8, which also bonds the casing 1, the cell module 2, and the docking plate 3, forming a solid whole and improving the reliability of the series connection of each cell 21. This also enhances the waterproof performance of the battery structure. To further improve the waterproof performance, a first waterproof adhesive 9 is filled at the opening 11 between the bracket 5 and the casing 1. To prevent external liquid from entering the receiving groove 51 and damaging the protection board module 6, a second waterproof adhesive 10 is filled at the opening of the receiving groove 51 between the cover plate 7 and the bracket 5.
[0037] Please refer to the following: Figures 1 to 4In this embodiment, all the battery cells 21 are cylindrical. Since the outer surface of the battery cell 21 is cylindrical, there will be gaps 22 between adjacent battery cells 21. These gaps 22 are filled with the aforementioned potting compound 8. In addition, the housing 1 has a first protrusion (not shown in the figure) protruding from the gap 22 toward the opening 11. The end of the first protrusion facing the opening 11 is provided with a first internal thread (not shown in the figure). The mating plate 3 is provided with a first through hole 33 at the position corresponding to each first protrusion. A first bolt 34 connected to the first internal thread passes through the first through hole 33. That is, the function of fixing the mating plate 3 to the housing 1 is achieved by multiple first bolts 34. Similarly, the housing 1 has a second protrusion (not shown in the figure) protruding from the gap 22 towards the opening 11. The end of the second protrusion facing the opening 11 is provided with a second internal thread (not shown in the figure). The bracket 5 is provided with a second through hole 52 at the position corresponding to each second protrusion. A second bolt 53 connected to the second internal thread passes through the second through hole 52. That is, the bracket 5 is fixed to the housing 1 by multiple second bolts 53. In addition to serving to fix the docking plate 3 or the bracket 5 to the housing 1, the first and second protrusions mentioned above also serve to limit the installation of each battery cell 21, thereby improving the stability of the battery cell 21 within the housing 1.
[0038] This embodiment also provides a two-wheeled electric vehicle, which includes a two-wheeled vehicle body (not shown in the figure) and the aforementioned battery structure welded with aluminum wire connected to the two-wheeled vehicle body. Due to the adoption of the aforementioned battery structure, the two-wheeled electric vehicle of this embodiment also has the advantages of slow heat spread, low fire risk, easy maintenance of the protection board module 6, and low cost.
[0039] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.
Claims
1. A battery structure using aluminum wire welding, characterized in that, Includes housing, battery cell module, docking plate, aluminum wire, bracket base, protection board module and cover plate; The housing has an opening, and the battery cell module includes a battery cell housed within the housing through the opening. The support base is fixedly connected to the housing and covers the opening. The docking plate is fixedly connected to the housing and disposed between the battery cell module and the support base. Multiple aluminum wires are connected to the docking plate, and the multiple aluminum wires and the docking plate are connected in series with multiple battery cells. The side of the support base facing away from the docking plate has a receiving groove. The protection plate module is fixed in the receiving groove and electrically connected to the docking plate. The cover plate is fixedly connected to the support base and covers the opening of the receiving groove.
2. The battery structure using aluminum wire welding as described in claim 1, characterized in that, The docking plate includes a base plate and a plurality of conductive components fixed on the base plate. Each conductive component has an aluminum wire connected to both ends. The aluminum wire is connected to the positive or negative terminal of the battery cell. The conductive components are connected in series with two corresponding battery cells through the aluminum wire at their respective ends.
3. The battery structure using aluminum wire welding as described in claim 2, characterized in that, The docking plate integrates a data acquisition device, which is electrically connected to multiple conductive components and to the protection board module.
4. The battery structure using aluminum wire welding as described in claim 1, characterized in that, The housing is filled with potting compound, which simultaneously bonds the housing, the battery module, and the mating plate.
5. The battery structure using aluminum wire welding as described in claim 1, characterized in that, A ring of first waterproof adhesive is filled between the bracket and the housing at the opening.
6. The battery structure using aluminum wire welding as described in claim 1, characterized in that, A second layer of waterproof adhesive is filled at the opening of the receiving groove between the cover plate and the support base.
7. The battery structure using aluminum wire welding as described in claim 1, characterized in that, The battery cell is a cylindrical battery cell with a gap between adjacent battery cells. The housing has a first protrusion protruding from the gap toward the opening. The end of the first protrusion facing the opening is provided with a first internal thread. The mating plate is provided with a first through hole at the position corresponding to each of the first protrusions. A first bolt connected to the first internal thread passes through the first through hole.
8. The battery structure using aluminum wire welding as described in claim 1, characterized in that, The battery cell is a cylindrical battery cell with a gap between adjacent battery cells. The housing has a second protrusion protruding in the gap toward the opening. The end of the second protrusion facing the opening is provided with a second internal thread. The bracket is provided with a second through hole at the position corresponding to each of the second protrusions. A second bolt connected to the second internal thread passes through the second through hole.
9. The battery structure using aluminum wire welding as described in claim 1, characterized in that, The cover plate is made of fiberboard.
10. A two-wheeled electric vehicle, characterized in that, The invention includes a two-wheeled vehicle body and a battery structure made of aluminum wire welding as described in any one of claims 1 to 9, which is connected to the two-wheeled vehicle body.