Lithium battery glue filling structure

Abstract

The utility model relates to a glue filling structure of a lithium battery. The glue pouring structure of the lithium battery comprises an upper plastic cover (10), a lower plastic shell (20), two battery core combinations (30) and pouring glue (40), the lower plastic shell (20) is provided with an accommodating space (21) for accommodating the battery core combination (30) and the pouring glue (40) therein, and the upper plastic cover (10) covers and is fixed on a top opening of the lower plastic shell (20) so as to seal the accommodating space (21); the lower plastic shell (20) is provided with a containing space (21), the horizontal section of the space shape of the containing space (21) is in a left-right symmetrical concave shape, the battery core combinations (30) are arranged in the containing space (21) and then borne at the bottom of the lower plastic shell (20), the two battery core combinations (30) are located in a left protruding section (22) and a right protruding section (22) which are symmetrical to each other of the containing space (21) respectively and are separated from each other, and the pouring glue (40) is filled between the two battery core combinations (30) in the containing space (21). According to the glue pouring structure of the lithium battery, the strength and the drop resistance are improved, and the protection safety level is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a lithium battery glue filling structure. Background Art

[0002] Lithium-ion batteries are composed of cells and protective circuit boards. The battery package combines the cells with the protective circuit board through a structure. When using batteries in some special environments, such as high humidity and high temperature forests, the requirements for the battery are not only high strength and drop resistance, but also rainproof, and the waterproof level must meet the IP67 standard.

[0003] With the continuous development and popularization of new energy technologies, various new energy batteries have emerged like mushrooms after rain. Due to the differences in electrical parameters and volume structure design, the use of batteries in different products requires multiple cells to be packaged into a whole battery pack. In the specific production process, the packaging and glue filling technology of the battery combination is an important part to ensure the safe charging and discharging of the battery.

[0004] The lithium battery glue filling structure can be used to wrap and protect the battery chip and circuit board, preventing the circuit board and battery chip from being damaged by external impact, vibration and other factors, thereby improving the service life and safety of the battery pack. The lithium battery glue filling structure can fix the battery chip and circuit board at the specified position of the battery pack, avoiding the displacement of the battery chip and circuit board due to factors such as vibration during use, thereby improving the stability of the battery pack. The lithium battery glue filling structure can isolate the battery chip, circuit board and other electronic components, avoiding mutual interference and damage between various components, and improving the durability and stability of the battery pack. The lithium battery glue filling structure can improve the thermal transfer performance of the battery pack, quickly dissipate the heat generated by the battery chip and circuit board, and ensure the stability and safety of the battery pack during operation.

[0005] Although the existing lithium battery glue-filled structure can pass the drop test, its strength and drop resistance are far from enough, and its protection safety level does not meet the IP67 standard.

[0006] There is an urgent need to develop a new type of lithium battery glue-filled structure to improve strength, drop resistance, and enhance the level of protective safety. Summary of the invention

[0007] Therefore, the purpose of the utility model is to provide a novel lithium battery glue filling structure to improve strength and drop resistance and enhance the protection safety level.

[0008] To achieve the above-mentioned purpose, the utility model provides a lithium battery glue filling structure, comprising: an upper plastic cover, a lower plastic shell, two battery cell assemblies, and glue filling; the lower plastic shell is provided with a receiving space for receiving the battery cell assembly and filling glue therein, and the upper plastic cover covers and is fixed to the top opening of the lower plastic shell to close the receiving space; the horizontal cross-section of the receiving space is a left-right symmetrical concave shape, and the battery cell assembly is placed in the receiving space and supported on the bottom of the lower plastic shell, and the two battery cell assemblies are respectively located in the symmetrical left and right protruding sections of the receiving space and are separated from each other, and the glue is filled between the two battery cell assemblies in the receiving space.

[0009] Wherein, the surface of the battery cell assembly is coated and packaged by a PVC film.

[0010] Wherein, the size of the three-dimensional shape of the battery cell assembly matches the protruding section of the concave-shaped accommodation space.

[0011] The three-dimensional shape of the battery cell assembly is a hexahedron whose horizontal cross section is a right-angled trapezoid, and is composed of a plurality of battery cells.

[0012] Wherein, in the accommodation space, the tip of the battery cell assembly faces the middle section of the accommodation space.

[0013] Among them, it also includes a battery cell protection plate, which is arranged on the inner wall of the lower plastic shell adjacent to the middle section of the accommodating space.

[0014] Wherein, the upper plastic cover is fixed to the top of the lower plastic shell via ultrasonic welding.

[0015] In summary, the lithium battery glue-filled structure of the utility model improves the strength and drop resistance and enhances the protection safety level. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following detailed description of the specific implementation of the utility model in conjunction with the accompanying drawings will make the technical solution and other beneficial effects of the utility model obvious.

[0017] Figure 1 This is an exploded schematic diagram of a preferred embodiment of the lithium battery glue filling structure of the utility model;

[0018] Figures 2 to 6 This is a schematic diagram of the assembly and molding process of a preferred embodiment of the lithium battery glue filling structure of the utility model. DETAILED DESCRIPTION

[0019] See also Figure 1 , which is a schematic diagram of an exploded view of a preferred embodiment of the lithium battery glue filling structure of the utility model, Figures 2 to 6 To describe the design of the utility model in detail, Figures 2 to 6 The schematic diagram of the assembly process of the preferred embodiment is as follows: Figure 2 The battery cell assembly molding in the battery glue filling structure is shown. Figure 3 The PVC film packaging of the battery cell combination is shown. Figure 4 Shows the battery cell assembly being loaded into the lower plastic shell. Figure 5 Displays the glue filling status. Figure 6 The assembled battery glue-filled structure is shown.

[0020] The lithium battery glue filling structure of the utility model mainly includes: an upper plastic cover 10, a lower plastic shell 20, two battery cell assemblies 30, and glue filling 40; the lower plastic shell 20 is provided with a receiving space 21 for receiving the battery cell assembly 30 and the glue filling 40 therein, and the upper plastic cover 10 covers and is fixed to the top opening of the lower plastic shell 20 to close the receiving space 21; the horizontal cross-section of the space shape of the receiving space 21 is generally in a left-right symmetrical concave shape, for example, in a U shape, and the battery cell assembly 30 is placed in the receiving space 21 and supported on the bottom of the lower plastic shell 20, and the two battery cell assemblies 30 are respectively located in the symmetrical left and right protruding sections 22 of the receiving space 21 and separated from each other, and the glue filling 40 is filled between the two battery cell assemblies 30 in the receiving space 21. Through such a space design, the strength and drop resistance of the final glue filling structure can be fully improved, and its protection safety level can be improved.

[0021] In this preferred embodiment, the surface of the battery cell assembly 30 is encapsulated by a PVC (polyvinyl chloride) film 31. The size of the three-dimensional shape of the battery cell assembly 30 is generally matched with the protruding section 22 of the concave-shaped accommodation space 21. Further, in this preferred embodiment, the three-dimensional shape of the battery cell assembly 30 is generally a hexahedron with a right-angled trapezoidal horizontal cross section, which is assembled from a plurality of battery cells 32. In the accommodation space 21, the tip of the battery cell assembly 30 faces the middle section 23 of the accommodation space 21. Through such a specific space and shape design, the strength and drop resistance of the final molded glue-filled structure are fully improved, and its protection safety level is improved.

[0022] In this preferred embodiment, the PCM 50 is disposed on the inner wall of the middle section 23 of the lower plastic shell 20 adjacent to the accommodating space 21 .

[0023] When making the lithium battery glue filling structure of the utility model, first combine the battery cell assembly and the battery cell protection board, install them into the lower plastic shell, then use the equipment to inject glue into the lower plastic shell to a certain height, wait for 24 hours to solidify, and then install the plastic cover and ultrasonically weld it with the lower plastic shell. Figures 2 to 6 First, Figure 2 As shown, multiple battery cells 32 are assembled and connected together to form a battery cell assembly 30 used in the next step. The multiple battery cells 32 generally form a hexahedron with a right-angled trapezoidal horizontal cross section. Figure 3As shown, the battery cell assembly 30 is packaged with a PVC film 31. Then, as Figure 4 As shown, the packaged battery cell assembly 30 is installed into the lower plastic shell 20, and the battery cell protection plate 50 is also assembled in place. Figure 5 As shown, the glue filling step is performed, and the lower plastic shell 20 is filled with glue 40, which is cured after 24 hours. Figure 6 As shown, the upper plastic cover 10 is fixed to the top of the lower plastic shell 20 by ultrasonic welding, thereby obtaining a lithium battery glue-filled structure with fully improved strength and drop resistance and improved protection safety level.

[0024] In summary, the lithium battery glue-filled structure of the utility model improves the strength and drop resistance and enhances the protection safety level.

[0025] As described above, for ordinary technicians in this field, various other corresponding changes and modifications can be made according to the technical scheme and technical concept of the utility model, and all these changes and modifications should fall within the protection scope of the claims attached to the utility model.

Claims

1. A lithium battery glue filling structure, characterized in that: include: An upper plastic cover (10), a lower plastic shell (20), two battery cell assemblies (30), and a glue potting (40); the lower plastic shell (20) is provided with a receiving space (21) for receiving the battery cell assembly (30) and the glue potting (40) therein, and the upper plastic cover (10) covers and is fixed to the top opening of the lower plastic shell (20) to close the receiving space (21); the horizontal cross-section of the space shape of the receiving space (21) is a concave shape that is symmetrical on both sides; after the battery cell assembly (30) is placed in the receiving space (21), it is supported on the bottom of the lower plastic shell (20); the two battery cell assemblies (30) are respectively located in the symmetrical left and right protruding sections (22) of the receiving space (21) and are separated from each other; and the glue potting (40) is filled between the two battery cell assemblies (30) in the receiving space (21).

2. The lithium battery glue filling structure according to claim 1, characterized in that: The surface of the battery cell assembly (30) is coated and encapsulated by a PVC film (31).

3. The lithium battery glue filling structure according to claim 1, characterized in that: The size of the three-dimensional shape of the battery cell assembly (30) matches the protruding section (22) of the concave-shaped accommodation space (21).

4. The lithium battery glue filling structure according to claim 1, characterized in that: The three-dimensional shape of the battery cell assembly (30) is a hexahedron whose horizontal cross section is a right-angled trapezoid, and is composed of a plurality of battery cells (32) assembled together.

5. The lithium battery glue filling structure as claimed in claim 4, characterized in that: In the accommodation space (21), the tip of the battery cell assembly (30) faces the middle section (23) of the accommodation space (21).

6. The lithium battery glue filling structure according to claim 1, characterized in that: It also includes a battery cell protection plate (50), which is arranged on the inner wall of the middle section (23) of the lower plastic shell (20) adjacent to the accommodating space (21).

7. The lithium battery glue filling structure according to claim 1, characterized in that: The upper plastic cover (10) is fixed to the top of the lower plastic shell (20) via ultrasonic welding.

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