System structure of 5c fast charging battery

Abstract

The application discloses a system structure of a 5C fast-charging battery, and relates to the technical field of electric vehicle batteries.The system structure comprises a shell and A&B modules installed in the shell, the top of the shell is provided with an upper cover connected with the shell, the A&B modules comprise a module A and a module B connected with each other, the module A and the module B comprise a plurality of groups of batteries and insulating support frames for fixing the batteries, one end of the A&B modules is provided with a BMS management system in an electrically connected mode, the other end of the A&B modules is provided with an electric control system in an electrically connected mode, and the BMS management system and the electric control system are located in the shell and correspond to the inner side walls of the shell.The insulating support frames built in the A&B modules can preliminarily limit and fix the group batteries, prevent the batteries from colliding and the pole posts from being misaligned due to shaking during transportation and use, and solve the problem that the traditional battery group and the shell are loose and the battery structure is unstable.

Description

Technical Field

[0001] This application relates to the field of electric vehicle battery technology, and in particular to a system structure for a 5C fast-charging battery. Background Technology

[0002] With the rapid popularization of light-powered vehicles such as electric bicycles, electric motorcycles, and urban logistics vehicles, users' demand for fast, safe, and convenient charging is becoming increasingly urgent. However, traditional charging methods, which employ slow charging that takes several hours to fully charge, lead to frequent issues such as indoor charging, centralized charging, unauthorized wiring, and unattended operation, causing numerous safety hazards and even fires. This has become a major bottleneck restricting the industry's development. Against this backdrop, technological innovation is needed; the emergence and continuous improvement of 5C fast-charging battery system technology can solve industry pain points and drive the industry's revitalization and development.

[0003] Regarding the aforementioned technologies, the inventors believe that many lithium-ion battery systems currently employ a buffer device between the battery module and the casing to reduce damage caused by vibration. However, after long-term vibration and turbulence, the battery pack and casing become loose, leading to instability in the battery structure. Utility Model Content

[0004] The purpose of this application is to provide a system structure for a 5C fast-charging battery to improve the problem that lithium-ion battery systems typically use a buffer device between the battery module and the casing to reduce damage caused by vibration. However, after long-term vibration and bumping, the battery pack and the casing become loose, leading to an unstable battery structure.

[0005] This application provides a system structure for a 5C fast-charging battery, which adopts the following technical solution: A system structure for a 5C fast-charging battery includes a housing and an A&B module installed within the housing. The top of the housing is provided with a cover connected to the housing. The A&B module includes modules A and B connected to each other. Modules A and B include several groups of batteries and an insulating support frame for fixing the batteries. One end of the A&B module is electrically connected to a BMS management system, and the other end of the A&B module is electrically connected to an electronic control system. The BMS management system and the electronic control system are both located inside the housing and correspond to its inner sidewall.

[0006] By adopting the above technical solution, the outer shell and the top cover form a closed protective space, which can effectively isolate external dust, moisture and minor external impacts, and prevent the internal battery, BMS management system and electronic control system from environmental corrosion or physical damage. The A&B module, as the core energy storage unit, is electrically connected to the BMS management system and the electronic control system at its two ends, respectively, which greatly shortens the wiring distance between the BMS and the battery, and between the electronic control system and the module, reduces energy loss caused by line resistance, and facilitates quick location of the fault source during later maintenance. The insulating support frame built into the A&B module can provide preliminary positioning and fixation for the battery pack, preventing the battery from colliding or the terminals from being misaligned due to shaking during transportation and use, and solving the problem of battery instability caused by loosening between the battery pack and the outer shell.

[0007] Optionally, the insulating support frame includes an upper insulating plate, a lower insulating plate, and an intermediate insulating plate connected to the battery. The upper insulating plate, the intermediate insulating plate, and the lower insulating plate are provided with mounting holes corresponding to the ends of the battery. The upper insulating plate and the lower insulating plate are provided with fixing rods that extend toward the intermediate insulating plate and are connected to the intermediate insulating plate.

[0008] By adopting the above technical solution, the upper and lower insulating plates are fastened to the middle insulating plate through a fixing rod extending toward the middle insulating plate, forming a three-dimensional support structure. This structure can resist the radial extrusion force generated by the battery's thermal expansion during 5C fast charging, and at the same time prevent the insulating plates from misaligning under high-frequency vibration scenarios, ensuring the relative stability of the battery and the insulation structure. The layered design of the three insulating plates can form three insulating barriers between batteries and between the battery and external metal parts, effectively blocking the risk of short circuits caused by battery leakage and exposed terminals.

[0009] Optionally, the sidewalls of modules A and B are provided with interconnecting connecting pieces.

[0010] By adopting the above technical solution, the insulating support frame of module A and module B can be directly connected and fixed through the connecting piece, which shortens the assembly time, reduces the number of parts, and lowers the production cost.

[0011] Optionally, the bottom of the A&B module is provided with a base plate corresponding to the inner side wall of the outer shell, and the base plate has a positioning groove corresponding to the bottom of the &B module.

[0012] By adopting the above technical solution, the positioning groove of the base plate is perfectly matched with the bottom shape of the A&B module. After the module is embedded in the positioning groove, the side wall of the positioning groove can form a rigid horizontal limit on the module, preventing the module from shifting left or right under vibration and bumpy conditions, and ensuring that the electrical connection between the A&B module and the BMS management system and the electronic control system is always stable. The base plate is tightly fitted to the inner side wall of the shell, which can buffer the vibration transmission between the module and the shell.

[0013] Optionally, limit bars are horizontally provided on both sides of the A&B module, and the side of the limit bars away from the A&B module and both ends abut against the inner sidewall of the outer shell.

[0014] By adopting the above technical solution, the limiting crossbars are rigidly pressed against both sides of the A&B module, so that the A&B module is completely confined within the closed space formed by the positioning groove of the base plate and the limiting crossbars on both sides. Even in the event of severe vibration or rollover, the A&B module will not shift or shake.

[0015] Optionally, a thermally conductive film is wrapped around the outside of the A&B module, and the thermally conductive film is made of heat-dissipating silicone ester.

[0016] By adopting the above technical solution, the thermal conductive film also has insulation properties, forming an additional insulating barrier between the A&B modules and the outer shell and limiting crossbar. The heat-dissipating silicone ester has excellent thermal conductivity, which can closely adhere to the outer wall of the module, quickly conducting battery heat to the surface of the thermal conductive film and improving heat dissipation efficiency. At the same time, the heat-dissipating silicone ester has good flexibility and plasticity, which can completely adhere to the irregular outer wall of the A&B module, eliminating heat dissipation dead corners and ensuring that the battery temperature difference in different areas of the module is controlled within a certain range, reducing the problem of decreased battery consistency caused by local overheating.

[0017] Optionally, the A&B module is covered with mounting plates at both ends, which are connected to the BMS management system and the electronic control system respectively, and the edges of the mounting plates are in contact with the thermal conductive film.

[0018] By adopting the above technical solution, the mounting plate serves as a fixed carrier for the BMS management system and the electrical control system. It can directly connect the two to both ends of the A&B module to form an integrated unit, preventing the layout dispersion and messy wiring problems caused by fixing the BMS management system and the electrical control system to the inner wall of the casing, reducing energy loss caused by the length of the line, and making the overall structure more compact.

[0019] Optionally, the top cover is provided with a charging and discharging port that is electrically connected to the electronic control system, so the top cover is horizontally provided with a handle position, and the outer shell is provided to fit the outer side wall of the top cover.

[0020] By adopting the above technical solution, the charging and discharging port integrated in the top cover is directly connected to the electronic control system, and users can charge and discharge the battery without disassembling the shell. The horizontally set handle on the top cover makes it easy for users to move the battery system. When replacing the battery, the handle is held to lift it, preventing inconvenience or the risk of slipping due to the smooth surface of the shell.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. As the core energy storage unit, the A&B module is electrically connected to the BMS management system and the electronic control system at its two ends, respectively. This significantly shortens the wiring distance between the BMS and the battery, and between the electronic control system and the module, reducing energy loss caused by line resistance. It also facilitates quick location of the fault source during later maintenance. The built-in insulating support frame of the A&B module can provide initial positioning and fixation for the battery pack, preventing collisions and misalignment of the terminals due to shaking during transportation and use. This solves the problem of battery structure instability caused by loosening between the battery pack and the casing. 2. The upper and lower insulating plates are fastened to the middle insulating plate by a fixing rod extending toward the middle insulating plate, forming a three-dimensional support structure. This structure can resist the radial extrusion force generated by the battery's thermal expansion during 5C fast charging, and at the same time prevent the insulating plates from misaligning under high-frequency vibration scenarios, ensuring the relative stability of the battery and the insulation structure. The layered design of the three insulating plates can form three insulating barriers between batteries and between the battery and external metal parts, effectively blocking the risk of short circuits caused by battery leakage and exposed terminals. 3. The positioning groove of the base plate is perfectly matched with the bottom shape of the A&B module. After the module is installed in the positioning groove, the side wall of the positioning groove can form a rigid horizontal limit on the module to prevent the module from shifting left or right under vibration and bumpy conditions, and ensure that the electrical connection between the A&B module and the BMS management system and the electronic control system is always stable. The base plate fits tightly with the inner side wall of the shell, which can buffer the vibration transmission between the module and the shell. Attached Figure Description

[0022] Figure 1 This is a partial cross-sectional view of the system structure of a 5C fast-charging battery. Figure 2 This is a partial schematic diagram of the A&B modules in a 5C fast-charging battery system structure. Figure 3 This is a partial schematic diagram of module A and module B.

[0023] In the diagram, 1. Outer shell; 2. A&B modules; 21. Module A; 22. Module B; 23. Battery; 24. Insulating support frame; 241. Upper insulating plate; 242. Lower insulating plate; 243. Middle insulating plate; 244. Mounting hole; 245. Fixing rod; 25. Limiting crossbar; 26. Thermal conductive film; 3. Top cover; 31. Charge / discharge port; 34. Handle position; 4. BMS management system; 5. Electronic control system; 6. Connecting piece; 7. Base plate; 71. Positioning groove; 8. Mounting plate. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail below.

[0025] A system structure for a 5C fast-charging battery, referring to Figure 1 and Figure 3 The system includes a housing 1 and an A&B module 2 installed within the housing 1. The housing 1 is made of aluminum alloy. The A&B module 2 includes interconnected modules A21 and B22. Modules A21 and B22 include several groups of batteries 23 and an insulating support frame 24 for fixing the batteries 23. The insulating support frame 24 includes an upper insulating plate 241, a lower insulating plate 242, and a middle insulating plate 243 connected to the batteries 23. Each insulating plate of the insulating support frame 24 is made of a mixture of nylon and fiberglass. The upper insulating plate 241, the middle insulating plate 243, and the lower insulating plate 242 have mounting points corresponding to the ends of the batteries 23. Hole 244, insert one end of battery 23 into the mounting hole 244 of lower insulating plate 242 to keep battery 23 evenly arranged; then cover the middle part of battery 23 with middle insulating plate 243, adjust the position of middle insulating plate 243 so that fixing rods 245 extending from upper insulating plate 241 and lower insulating plate 242 can pass through the corresponding holes of middle insulating plate 243, then cover the other end of battery 23 with upper insulating plate 241, middle insulating plate 243 and lower insulating plate 242 with fixing rods 245 and then fasten them with screws to complete the assembly of module A21 and module B22 respectively.

[0026] Reference Figure 1 , Figure 2 and Figure 3 Connecting pieces 6 are fixed to the side walls of modules A21 and B22 with screws to connect and fix modules A21 and B22 into a whole. The terminal areas of several groups of batteries 23 in modules A21 and B22 are welded together with large copper and nickel sheets. A base plate 7 is placed at the bottom inside the outer shell 1. The base plate 7 has a positioning groove 71 corresponding to the bottom of module A21 and B22. The base plate 7 is also made of a mixture of nylon and glass fiber. The bottom of modules A21 and B22 is embedded into the positioning groove 71 of the base plate 7. Limiting crossbars 25 are installed horizontally on both sides of modules A21 and B22. The position of the limiting crossbars 25 is adjusted so that the side and both ends of the limiting crossbars 25 away from the module are tightly abutted against the inner side wall of the outer shell 1.

[0027] Reference Figure 1 , Figure 2 and Figure 3The outer side of module A&B 2 is wrapped with a thermal conductive film 26, which is made of heat-dissipating silicone ester to ensure that the thermal conductive film 26 completely adheres to the module surface without bubbles or gaps. Then, the mounting plate 8 is covered on both ends of module A&B 2 and fixed with screws. The BMS management system 4 and the electronic control system 5 are fixed to the side wall of the mounting plate 8 with screws respectively. The BMS management system 4, the electronic control system 5 and the copper and nickel sheets welded to the battery 23 terminals are electrically connected. At the same time, the edge position of the mounting plate 8 is adjusted so that the edge of the mounting plate 8 is tightly attached to the thermal conductive film 26. The top of the outer shell 1 is fixed with screws to a top cover 3 that is adapted to the top of the outer shell 1. The top cover 3 is equipped with a charging and discharging port 31 that is electrically connected to the electronic control system 5. The electrical connection is achieved through wires. The inner side wall of the outer shell 1 is completely attached to the outer side wall of the top cover 3. The top cover 3 is horizontally provided with an integrally formed handle position 34.

[0028] The implementation principle of this application embodiment is as follows: In terms of structural fixation, the heat-dissipating silicone ester thermal conductive film 26 on the outside of the A&B module 2 can quickly dissipate the heat generated by the battery 23 and electronic components, and then dissipate it outward through the outer shell 1, preventing the risk of thermal runaway and extending the service life of the battery 23. The mounting plate 8 integrates the BMS management system 4, the electronic control system 5 and the module into one unit, shortening the wiring distance, reducing losses, and facilitating maintenance. The three-layer plate of the insulating support frame 24 and the fixing rod 245 form a basic limit for the battery 23. The positioning groove 71 of the base plate 7 and the limit crossbars 25 on both sides ensure that the A&B module 2 remains stable under vibration and rollover scenarios, solving the problem of structural instability of the battery 23 caused by loosening between the traditional battery 23 group and the outer shell 1.

[0029] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A system structure for a 5C fast-charging battery, characterized in that: The device includes a housing (1) and an A&B module (2) installed in the housing (1). The top of the housing (1) is provided with a cover (3) connected to the housing (1). The A&B module (2) includes a module A (21) and a module B (22) connected to each other. The module A (21) and module B (22) include several groups of batteries (23) and an insulating support frame (24) for fixing the batteries (23). One end of the A&B module (2) is electrically connected to a BMS management system (4), and the other end of the A&B module (2) is electrically connected to an electronic control system (5). The BMS management system (4) and the electronic control system (5) are both located inside the housing (1) and correspond to its inner sidewall.

2. The system structure of a 5C fast-charging battery according to claim 1, characterized in that: The insulating support frame (24) includes an upper insulating plate (241), a lower insulating plate (242), and an intermediate insulating plate (243) connected to the battery (23). The upper insulating plate (241), the intermediate insulating plate (243), and the lower insulating plate (242) are provided with mounting holes (244) corresponding to the ends of the battery (23). The upper insulating plate (241) and the lower insulating plate (242) are provided with fixing rods (245) that are connected to the intermediate insulating plate (243) extending toward the intermediate insulating plate (243).

3. The system structure of a 5C fast-charging battery according to claim 2, characterized in that: The side walls of modules A (21) and B (22) are provided with interconnecting connecting pieces (6).

4. The system structure of a 5C fast-charging battery according to claim 3, characterized in that: The bottom of the A&B module (2) is provided with a bottom plate (7) corresponding to the inner side wall of the outer shell (1), and the bottom plate (7) is provided with a positioning groove (71) corresponding to the bottom of the A&B module.

5. The system structure of a 5C fast-charging battery according to claim 4, characterized in that: Limiting crossbars (25) are horizontally arranged on both sides of the A&B module (2). The side of the limiting crossbar (25) away from the A&B module (2) and both ends abut against the inner wall of the outer shell (1).

6. The system structure of a 5C fast-charging battery according to claim 5, characterized in that: The A&B module (2) is wrapped with a thermally conductive film (26) on the outside, and the thermally conductive film (26) is made of heat-dissipating silicone ester.

7. The system structure of a 5C fast-charging battery according to claim 6, characterized in that: The A&B module (2) is covered with mounting plates (8) at both ends. The mounting plates (8) are connected to the BMS management system (4) and the electrical control system (5) respectively, and the edge of the mounting plate (8) is attached to the heat-conducting film (26).

8. The system structure of a 5C fast-charging battery according to claim 7, characterized in that: The top cover (3) is provided with a charging and discharging port (31) that is electrically connected to the electronic control system (5), so the top cover (3) is horizontally provided with a handle position (34), and the outer shell (1) is fitted to the outer wall of the top cover (3).

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