Household energy storage battery PACK structure

Abstract

The utility model discloses a household energy storage battery PACK structure which comprises a box body, a battery module and a box cover, a battery cell monitoring unit, a wire harness, a handle, a male end connector and a female end connector are installed on the box body, the battery module is locked on the box body through long screws, and the box cover is fixed on the box body through screws. According to the utility model, all foams are made of the RPP material, so that the foam has various performances of EVA foams and has longer durability, and the service life of the industrial and commercial storage battery module is further prolonged. The series aluminum bars between the battery cells are welded through laser, so that risks such as disconnection of joints in the carrying process are avoided. The steel belt scheme has the remarkable advantages in the aspects of strength, light weight, manufacturing simplification, heat dissipation, flexible design, cost effectiveness, vibration and impact resistance, convenience in maintenance and the like, the performance and reliability of the battery pack are favorably improved, and the service life is long.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, and in particular to a PACK structure for a household energy storage battery. Background Technology

[0002] In existing technologies, lithium batteries are typically used as the main energy storage unit for residential energy storage, generally employing a CTP (cell-to-pack) assembly method. This method uses several individual cells within a casing, with EVA foam connecting them and internal pressure strips for fixation. However, this CTP method has significant drawbacks in later use. This series connection makes battery module assembly inconvenient, and during transportation, the screws are easily loosened due to vibration.

[0003] CTP technology places higher demands on manufacturing processes and materials. The consistency and quality of the cells must be strictly controlled, otherwise overall performance will be affected. CTP batteries integrate the cells directly into the battery pack, omitting the module structure. This makes it difficult to replace a single damaged cell, often requiring the replacement of the entire battery pack, increasing maintenance costs. Due to the direct integration of the cells, the heat dissipation design is more complex, requiring a more sophisticated thermal management system, increasing design and manufacturing costs. Uneven heat dissipation can also affect battery performance and lifespan. Utility Model Content

[0004] The purpose of this utility model is to provide a solution to the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A residential energy storage battery PACK structure includes a housing, a battery module, and a housing cover. A cell monitoring unit, a wiring harness, a handle, a male connector, and a female connector are mounted on the housing. The battery module is secured to the housing with long screws, and the housing cover is fixed to the housing with screws.

[0007] The battery module includes two battery modules. The mounting plate and support plate are installed on both sides of the battery module with screws. The bridging bus is installed on the battery module. The insulating sheet is installed on the plastic base.

[0008] A single battery module includes several battery cells, which are arranged sequentially on a stacking device according to their positive and negative polarities. Two spacer foam sheets are pasted between adjacent battery cells. The two sides of the battery cells are end plates, and end plate foam is pasted between the end plates and the battery cells. Steel strips and plastic steel strips are fitted into the slots of the end plates to fix the battery cells of the single battery module. Insulating sheets for the terminals are pasted on the single battery module, and busbars are welded on. The side insulating sheets and module insulating sheets are both pasted on the single battery module. A heating film and a plastic base are set at the bottom of the single battery module.

[0009] The box body, handle, lid, fixing plate, and tray are made of SGCC.

[0010] The end plate foam and spacer foam are made of RPP.

[0011] The aforementioned jumper bus is made of copper.

[0012] The busbar is made of aluminum 6061.

[0013] The battery cell is a lithium iron phosphate square aluminum-cased battery cell.

[0014] The insulating sheet, side insulating sheet, module insulating sheet, and pole insulating sheet are made of PC.

[0015] Compared with existing technologies, this invention has the following advantages: All foam in this invention is made of RPP material, which possesses many of the properties of EVA foam and has longer durability, further improving the lifespan of commercial and industrial battery modules. The series aluminum busbars between the cells are laser-welded, avoiding the risk of breakage at the connection points during transportation. The steel strip solution has significant advantages in terms of strength, lightweight, simplified manufacturing, heat dissipation, design flexibility, cost-effectiveness, vibration and shock resistance, and convenient maintenance, which helps to improve the performance and reliability of the battery pack and extend its service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the battery module assembly structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the assembly structure of the battery single module of this utility model;

[0019] In the diagram: 1. Housing; 2. Cell monitoring unit; 3. Wiring harness; 4. Handle; 5. Male connector; 6. Cover; 7. Battery module; 8. Female connector; 9. Single battery module; 10. Insulating sheet; 11. Jumper busbar; 12. Fixing plate; 13. Support plate; 14. Steel strip; 15. End plate foam; 16. End plate; 17. Battery cell; 18. Spacer foam; 19. Side insulating sheet; 20. Plastic steel strip; 21. Module insulating sheet; 22. Busbar; 23. Terminal insulating sheet; 24. Heating film; 25. Plastic base. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] A residential energy storage battery PACK structure includes a housing 1, a battery module 7, and a housing cover 6. A cell monitoring unit 2, a wiring harness 3, a handle 4, a male connector 5, and a female connector 8 are installed on the housing 1. The battery module 7 is fastened to the housing 1 by long screws, and the housing cover 6 is fixed to the housing 1 by screws.

[0022] The battery module 7 includes two battery modules 9. The mounting plate 12 and the support plate 13 are installed on both sides of the battery module 9 with screws. The bridging bus 11 is installed on the battery module 9. The insulating sheet 10 is installed on the plastic base 25.

[0023] The battery module 9 includes several cells 17, which are arranged sequentially on a stacking device according to positive and negative polarities. Two spacer foams 18 are pasted between adjacent cells 17. The two sides of the cells 17 are end plates 16, and end plate foams 15 are pasted between the end plates 16 and the cells 17. Steel strips 14 and plastic steel strips 20 are fitted into the slots of the end plates 16 to fix the cells 17 of the battery module 9. Insulating plates 23 are pasted on the battery module 9, and busbars 22 are welded on. The side insulating plates 19 and module insulating plates 21 are pasted on the battery module 9. A heating film 24 and a plastic base 25 are provided at the bottom of the battery module 9.

[0024] The casing 1, handle 4, lid 6, fixing plate 12, and tray 13 are made of SGCC. Their function is to protect the battery cells and other components from the influence of the external environment, while improving the heat dissipation performance of the battery to maintain the stability and safety of the battery pack.

[0025] The end plate foam 15 and the spacer foam 18 are made of RPP, which provides heat insulation, cushioning, flame retardancy, sealing, support and shock absorption.

[0026] The aforementioned bridging bus 11 is made of copper, which has excellent conductivity and high current carrying capacity, as well as good corrosion resistance and oxidation resistance.

[0027] The busbar 22 is made of aluminum 6061. Its function is mainly to conduct current, ensure stability and reliability, dissipate heat and maintain thermal balance, and ensure safety.

[0028] The cell monitoring unit 2 is a core component of the battery management system (BMS). It is responsible for real-time monitoring, control and protection of the battery pack to ensure the efficient, safe and reliable operation of the battery system.

[0029] The male connector 5 and female connector 8 are key components that convert the electrical energy output from the battery into mechanical energy.

[0030] The battery cell 17 is a lithium iron phosphate square aluminum-cased battery cell, which stores and releases electrical energy. The quality of the battery cell directly determines the performance of the battery, including its range, safety performance, and overall performance.

[0031] The insulating sheet 10, side insulating sheet 19, module insulating sheet 21, and pole insulating sheet 23 are made of PC. They possess fire-retardant, flame-retardant, insulating, and high-temperature resistant properties, while also providing insulation protection and short-circuit protection, ensuring the circuit remains open.

[0032] The function of the heating film 24 is to raise the battery temperature by heating, reduce internal resistance, and restore charge and discharge performance.

[0033] The overall assembly of this utility model is as follows: Figure 1 As shown:

[0034] Pre-install the internal parts of the housing 1, install the cell monitoring unit 2, handle 4, male connector 5 and female connector 8 on the housing 1, use tooling to fasten the battery module 7 to the housing 1 with long screws, then install and connect the wiring harness 3 as required, organize the wiring harness inside the battery box, and finally fix the cover 6 to the housing 1 with screws.

[0035] Battery module assembly such as Figure 2 As shown:

[0036] Two battery modules 9 are fixed in place using a positioning fixture. The mounting plate 12 and the support plate 13 are then installed on both sides of the module using screws. The jumper bus 11 is then installed on the battery module 7. Finally, the insulating sheet 10 is installed on the plastic base 25.

[0037] Single-cell module stacking as Figure 3 As shown:

[0038] Several battery cells 17 are arranged sequentially on the stacking equipment according to their positive and negative polarities, with two spacer foam sheets 18 attached between adjacent cells 17. End plate foam sheets 15 need to be attached between the end plates 16 on both sides of the battery module 9 and the cells 17. Based on the extrusion parameters provided by the cell manufacturer, the stacking equipment parameters are adjusted for extrusion. A steel strip 14 is inserted into the module from top to bottom, and a plastic steel strip 20 is inserted into the module from bottom to top. The steel strip 14 and plastic steel strip 20 need to be moved into the slots of the end plate 16 to prevent them from falling off. Insulating sheets 23 are attached to the terminal posts on the module. After placing the aluminum busbar positioning fixture on the module, the busbar 22 and plastic base 25 are placed into the positioning fixture in sequence. The entire assembly is then transferred to a laser welding equipment for welding the busbar 22. Voltage and temperature acquisition lines are then welded using a handheld laser welding equipment. Cable ties are used to organize the internal wiring of the module. Finally, the module insulating sheet 21 is attached to the module.

[0039] The above description is a preferred embodiment of the present utility model. For those skilled in the art, any changes, modifications, substitutions and variations made to the implementation methods without departing from the principles and spirit of the present utility model, based on the teachings of the present utility model, still fall within the protection scope of the present utility model.

Claims

1. A residential energy storage battery PACK structure, characterized in that, The device includes a housing, battery modules, and a cover. A cell monitoring unit, wiring harness, handle, male connector, and female connector are mounted on the housing. The battery modules are secured to the housing with long screws, and the cover is fixed to the housing with screws. The battery modules include two sets of individual battery modules. Mounting plates and support plates are mounted on both sides of the individual battery modules with screws. A jumper bus is mounted on the individual battery modules, and an insulating sheet is mounted on a plastic base.

2. The residential energy storage battery PACK structure as described in claim 1, characterized in that, A single battery module comprises several battery cells, which are arranged sequentially on a stacking device according to their positive and negative polarities. Two spacer foam sheets are pasted between adjacent battery cells. The two sides of the battery cells are end plates, and end plate foam is pasted between the end plates and the battery cells. Steel strips and plastic steel strips are fitted into the slots of the end plates to fix the battery cells of the single battery module. Insulating sheets for the terminal posts are pasted on the single battery module, and busbars are welded on. Side insulating sheets and module insulating sheets are also pasted on the single battery module. A heating film and a plastic base are set at the bottom of the single battery module.

3. The residential energy storage battery PACK structure as described in claim 2, characterized in that, The box body, handle, lid, fixing plate, and tray are made of SGCC.

4. The residential energy storage battery PACK structure as described in claim 2, characterized in that, The end plate foam and spacer foam are made of RPP.

5. The residential energy storage battery PACK structure as described in claim 2, characterized in that, The aforementioned jumper bus is made of copper.

6. The residential energy storage battery PACK structure as described in claim 2, characterized in that, The busbar is made of aluminum 6061.

7. The residential energy storage battery PACK structure as described in claim 2, characterized in that, The battery cell is a lithium iron phosphate square aluminum-cased battery cell.

8. The residential energy storage battery PACK structure as described in claim 2, characterized in that, The insulating sheet, side insulating sheet, module insulating sheet, and pole insulating sheet are made of PC.

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