Module injection molding part, module end plate and battery module

Abstract

The utility model relates to a module injection molding part, a module end plate and a battery module, and relates to the technical field of lithium ion battery pack liquid cooling energy storage, the top of the injection molding part is provided with a plurality of embedded nuts which are respectively connected with a positive electrode aluminum bar, a negative electrode aluminum bar and a printed circuit board, and the edge of the top of the injection molding part extends outwards to form a flange edge; a protruding structure used for installation is arranged at the bottom of the injection molding part. According to the utility model, by optimizing the module injection molding part, enough creepage distance is ensured, arc discharge and electric leakage are effectively prevented, the reliability of the battery module is ensured, the battery module can stably work in high-voltage, high-humidity and polluted environments without being influenced by severe conditions, and the risk of fire and electric shock accidents is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium ion battery pack liquid cooling energy storage technical field especially a kind of mould injection part, mould end plate and battery module. BACKGROUND

[0002] With the rapid development of new energy vehicles, portable electronic devices and large-scale energy storage systems, the demand for energy storage battery packs is increasing. In these battery packs, injection molding parts play a key role, and their design needs to consider multiple aspects: structural strength, heat dissipation performance, protection level, and most importantly, electrical safety performance. In particular, the design of the creepage distance, which refers to the shortest path distance between two conductive components along the surface of insulating material, is crucial for preventing arc discharge and leakage.

[0003] In the design of battery packs, injection molding parts are usually used to secure positive and negative copper bars, CCS positive and negative aluminum bars, and FPCs. These components may directly contact or be close to high-voltage circuits. Therefore, ensuring sufficient creepage distance is crucial for the safe operation of battery packs.

[0004] However, existing injection molding seat designs have some defects and shortcomings. Due to space limitations, improper material selection, or inadequate design considerations, the creepage distance may be insufficient. In high-voltage, high-humidity, or polluted environments, this deficiency increases the risk of arc discharge and leakage, which may cause fires or electric shock accidents. In addition, different countries and regions have different standards and regulations for the electrical safety performance of energy storage battery packs. Existing injection molding seat designs may not fully comply with these standards and regulations, resulting in key parameters such as creepage distance not meeting requirements, increasing the compliance risk of products in the global market.

[0005] To improve the safety of battery packs and market competitiveness, the design of injection molding parts needs to consider improving the creepage distance to meet the requirements of special working conditions such as high altitude. This not only reduces safety risks but also ensures the compliance of products in the global market. Therefore, future injection molding seat designs should focus more on these factors to meet the growing market demand and strict safety standards. SUMMARY

[0006] The utility model aims at providing a kind of mould injection part, mould end plate and battery module to improve the creepage distance of injection molding part, meet the electrical safety requirements in different environments and the compliance standards of global market.

[0007] To achieve the above purpose, the technical scheme of the utility model provides a kind of mould injection part, injection molding part top is equipped with multiple embedded nuts to connect positive and negative aluminum bars and printed circuit board respectively, the flange edge is extended outwardly on the edge of injection molding part top, the convex structure for installation is arranged on the bottom of injection molding part.

[0008] Preferably, the periphery of the embedded nut is provided with a groove.

[0009] The technical scheme of the utility model further provides a module end plate, including end plate, the top of end plate both ends all install preceding module injection molding spare.

[0010] Preferably, the end plate is provided with two hollow cavities along the length direction thereof, and each of the hollow cavities is provided with reinforcing ribs on the inner side thereof.

[0011] Preferably, any two adjacent reinforcing ribs in the hollow cavity form a triangular cross-section or trapezoidal cross-section cavity with the inner wall.

[0012] Preferably, the reinforcing rib one is located at the middle section of the length direction of the hollow cavity and is perpendicular to the inner wall.

[0013] Preferably, the width of the reinforcing rib one gradually increases from the middle section thereof to one end thereof.

[0014] Preferably, the hollow cavity is provided with a reinforcing rib two, a reinforcing rib three, and a reinforcing rib four connected with the inner wall at a position close to the end of the end plate.

[0015] Preferably, the cross-sections of the three small cavities are right-angled triangle, isosceles triangle, and right-angled trapezoid, respectively.

[0016] Preferably, the cross-sections of two small protrusions are right-angled triangle, and the cross-section of the other small protrusion is isosceles triangle.

[0017] In summary, the utility model has the following beneficial technical effects:

[0018] The utility model optimizes the injection molding spare, ensures sufficient creepage distance, effectively prevents electric arc discharge and electric leakage, ensures the reliability of the battery module, can stably work under high voltage, high humidity, and polluted environment without being affected by severe conditions, and reduces the risk of fire and electric shock accidents. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1The utility model discloses a module injection molding part, module end plate and battery module injection molding part structure schematic view in it.

[0020] Figure 2 The utility model discloses a module injection molding part, module end plate and battery module injection molding part plan view in it.

[0021] Figure 3 The utility model discloses a module injection molding part, module end plate and battery module injection molding part section view in it.

[0022] Figure 4 The utility model discloses a module injection molding part, module end plate and battery module end plate and injection molding part connection structure schematic view in it.

[0023] Figure 5 The utility model discloses a module injection molding part, module end plate and battery module end plate and injection molding part connection structure schematic view in it.

[0024] Figure 6 The utility model discloses a module injection molding part, module end plate and battery module injection molding part structure schematic view in it.

[0025] Fig. 1, M3 embedded nut; 2, injection molding part; 3, M6 embedded nut; 4, flange edge; 5, end plate; 6, reinforcing rib; 61, reinforcing rib one; 62, reinforcing rib two; 63, reinforcing rib three; 64, reinforcing rib four; 7, hollow inner chamber; 8, convex structure; 9 copper bar; 10, aluminum bar; 11, FPC. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] The utility model discloses a module injection molding part, module end plate and battery module applied to liquid cooling energy storage battery system, the utility model designs ingenious, aims at improving the safety and reliability of battery system.

[0028] The utility model mainly includes end plate 5 and injection molding part 2. Injection molding part 2 top design has two M3 embedded nuts 1 and two M6 embedded nuts 3, and these two kinds of nuts are used for fixing the positive and negative pole aluminum bar of CCS (integrated female bar) and the FPC (flexible printed circuit board) of CCS respectively. In addition, by setting the groove around M3 embedded nut 1 and M6 embedded nut 3, the electrical connection stability of injection molding part 2 is further increased.

[0029] In order to improve the safety of the battery module, the top edge of the injection molding part 2 extends outward to form a flange edge 4, which extends 5mm in the transverse direction, effectively improving the creepage distance. This design enables the battery module to adapt to higher altitude conditions, with a creepage distance of up to 20mm, sufficient to match the use environment at an altitude of 4000m.

[0030] The design of the end plate 5 also focuses on lightweight and mechanical strength. The end plate 5 is provided with two symmetrical hollow cavities 7 along the length direction, and a plurality of reinforcing ribs 6 are distributed on the inner side of the hollow cavities 7. Such structure not only reduces the weight, but also ensures sufficient mechanical strength, providing reliable support for the battery cells in the battery module. Any two adjacent reinforcing ribs 6 and the inner wall of the hollow cavity 7 form a polygonal cross-section cavity structure, including a plurality of triangular cross-sections and trapezoidal cross-sections, which provide pre-tightening force for the battery cells, effectively protect the battery cells from deformation due to expansion and battery module handling and use, better protect the battery cells inside the battery module, and enhance the safety and reliability of the battery module.

[0031] The hollow cavity 7 is provided with two reinforcing ribs 61 which are spaced apart and perpendicular to the inner wall at the middle section of the length direction of the hollow cavity 7, and the width of the reinforcing rib 61 gradually increases from the middle section to the connection with the inner wall. In addition, the hollow cavity 7 is provided with reinforcing rib two 62, reinforcing rib three 63, reinforcing rib four 64 connected with the inner wall at the position close to the end of the end plate 5, wherein the reinforcing rib two 62 is perpendicular to the inner wall to divide a rectangular cross-section cavity in the hollow cavity 7, the reinforcing rib three 63 and the reinforcing rib four 64 are arranged in the rectangular cross-section cavity and are connected with the opposite two inner walls of the hollow cavity 7, wherein the reinforcing rib two 62 and the reinforcing rib three 63 further divide a right triangle cross-section small cavity in the aforementioned rectangular cross-section cavity, the reinforcing rib three 63 and the reinforcing rib four 64 further divide an isosceles triangle cross-section small cavity in the aforementioned rectangular cross-section cavity, and the reinforcing rib four 64 and the inner wall of the hollow cavity 7 further divide a right trapezoidal cross-section small cavity in the aforementioned rectangular cross-section cavity.

[0032] The injection molding part 2 is provided with protruding structures 8 at the bottom of the end portion where the M6 embedded nut 3 is located, which are used to connect the end plate 5. The shapes of these protruding structures 8 match the reinforcing ribs 6 of the end plate 5, facilitating positioning and fixation, and simplifying the installation process. Specifically, the protruding structures 8 are divided into two right triangle cross-sections and one isosceles triangle cross-section small protrusions, which correspond to the small cavities of the hollow cavity 7 for insertion and cooperation, ensuring the tightness and stability of the structure. One right triangle and isosceles triangle cross-section small protrusions correspond to the right triangle and isosceles triangle cross-section small cavities for insertion and cooperation, respectively, and the other right triangle cross-section small protrusion corresponds to the right trapezoidal cross-section small cavity for insertion and cooperation. When inserted and cooperated, the right angle edge of the right triangle cross-section is away from the right angle waist of the right trapezoidal cross-section.

[0033] The material of the injection molding part 2 and the end plate 5 has multiple choices, including PP (polypropylene), PC, PA, ABS, PMMA and other insulating materials. The material removal mode, bottom shape and embedded nut hole position of the injection molding part 1 can be adjusted according to actual needs to adapt to different application scenarios. The position and length of the flange edge 4 can also be adjusted according to design requirements to meet different creepage distance requirements.

[0034] The module injection molding part, the module end plate and the battery module of the utility model provide structural optimization for the liquid-cooled energy storage battery system with unique design, enhance the safety and reliability of the battery system, and maintain the flexibility and adaptability of the design.

[0035] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A modular injection molded piece, characterized in that, The top of the injection molding part (2) is provided with a plurality of embedded nuts for connecting positive and negative aluminum bars and printed circuit boards, respectively, and the top edge of the injection molding part (2) extends outwardly with a flange (4), and the bottom of the injection molding part (2) is provided with a protruding structure (8) for mounting.

2. A modular injection molded part according to claim 1, wherein, The embedded nuts are provided with grooves around the periphery.

3. A module end plate, characterized by An end plate (5) is included, and the top of the end plate (5) is provided with the injection molding part of the module as claimed in claim 1 or 2.

4. A modular end plate according to claim 3, wherein, The end plate (5) is provided with two hollow cavities (7) along the length direction thereof, and each of the hollow cavities (7) is provided with reinforcing ribs (6) on the inner side thereof, and the protruding structure (8) can be inserted and matched with the reinforcing ribs (6) and the inner wall of the hollow cavities (7).

5. A modular end plate according to claim 4, wherein, Any two adjacent reinforcing ribs (6) and the inner wall in the hollow cavity (7) form a triangular cross-section or trapezoidal cross-section cavity.

6. A modular end plate according to claim 5, wherein, A reinforcing rib one (61) is provided in the middle section of the length direction of the hollow cavity (7) and is perpendicular to the inner wall.

7. A modular end plate according to claim 6, wherein, The width of the reinforcing rib one (61) gradually increases from the middle section thereof to one end thereof.

8. A modular end plate according to claim 5, wherein, The hollow cavity (7) is provided with a reinforcing rib two (62), a reinforcing rib three (63) and a reinforcing rib four (64) connected with the inner wall near the end of the end plate (5), the reinforcing rib two (62) is perpendicular to the inner wall to divide a rectangular cross-section cavity, the reinforcing rib three (63) and the reinforcing rib four (64) are located in the rectangular cross-section cavity and divide the cavity into three small cavities, and the protruding structure (8) includes three small protrusions which can be respectively inserted and matched with the three small cavities.

9. A modular end plate according to claim 8, wherein, The cross-sections of the three small cavities are right-angled triangle, isosceles triangle and right-angled trapezoid, respectively; the cross-sections of two small protrusions are right-angled triangle, and the cross-section of the other small protrusion is isosceles triangle; one right-angled triangle cross-section small protrusion is matched with the right-angled trapezoid cross-section small cavity, and the right-angled triangle cross-section small protrusion is away from the right angle of the right-angled trapezoid cross-section when being inserted.

10. A battery module, characterized by The module end plate as claimed in any one of claims 3-9 is installed.

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