Novel plastic partition plate structure for rectangular battery cell pack

Abstract

The utility model discloses a novel plastic partition plate structure for a rectangular battery cell pack. The novel plastic partition plate structure comprises a frame body and an isolation structure arranged on the frame body, the isolation structure comprises a plurality of isolation parts for placing battery cells, and each isolation part comprises isolation columns arranged at the two ends and an isolation plate connected between the two isolation columns; the frame body comprises a plurality of supporting columns and connecting parts which are arranged above the supporting columns and are used for connecting the adjacent supporting columns; an isolation part is correspondingly arranged below the connecting part, a supporting base is arranged at the bottom of the supporting column, and the isolation column is arranged between the supporting base and the connecting part. According to the utility model, the battery cells are placed in the isolation structure, so that the insulation isolation between the battery cells is realized, and the battery cells are stably placed in the battery shell.

Description

Technical Field

[0001] This utility model belongs to the field of battery manufacturing, and in particular relates to a novel plastic separator structure for rectangular battery cell packs. Background Technology

[0002] A rectangular battery pack refers to a battery module formed by combining multiple individual rectangular lithium-ion batteries or other types of batteries through specific electrical and mechanical connections, resulting in a larger capacity and higher voltage output. This modular battery solution is widely used in electric vehicles, energy storage systems, portable electronic devices, and uninterruptible power supplies (UPS). Due to its compact structure, high energy density, and ease of assembly, rectangular battery packs have become an important component of modern battery technology.

[0003] In traditional rectangular battery pack designs, epoxy boards or bakelite, also known as phenolic resin boards, are commonly used as separator materials to separate individual cells, ensuring electrical isolation and providing physical support. However, with increasingly stringent battery performance requirements, these existing separator materials are showing some shortcomings. Epoxy boards and bakelite have high hardness, making them prone to cracking or burrs during cutting and drilling, increasing production difficulty and potentially reducing yield. Their relatively low strength and toughness mean they may crack under impact or vibration, affecting the overall pack's safety and reliability. While they possess some insulation capabilities, their insulation performance may be insufficient to completely prevent short circuits in increasingly high-voltage applications. Epoxy boards and bakelite may deform under temperature changes or prolonged exposure to high voltage, affecting the spacing between adjacent cells and potentially leading to poor contact or short circuits. With the rapid development and technological advancements in the new energy vehicle industry, higher demands are being placed on lightweight, miniaturized, and high-performance battery packs, rendering traditional materials increasingly inadequate for these new market needs. Utility Model Content

[0004] The purpose of this invention is to provide a novel plastic separator structure for rectangular battery cell packs, so as to solve the technical problem of tightly insulating and stably placing rectangular battery cells in battery packs.

[0005] To achieve the above objectives, the specific technical solution of this utility model for a novel rectangular battery pack plastic separator structure is as follows:

[0006] A novel plastic separator structure for a rectangular battery pack includes a frame and an isolation structure disposed on the frame;

[0007] The isolation structure includes a plurality of isolation sections for placing battery cells. Each isolation section includes isolation posts at both ends and an isolation plate connected between two of the isolation posts.

[0008] The frame includes several support columns and a connecting part arranged above the support columns to connect adjacent support columns; an isolation part is arranged below the connecting part, a support base is arranged at the bottom of the support column, and the isolation column is arranged between the support base and the connecting part.

[0009] As a further improvement of this utility model, the top of the isolation column abuts against the lower end face of the connecting part, and the bottom abuts against the upper end face of the support base, and is clamped between the support base and the connecting part.

[0010] As a further improvement of this utility model, the top of the isolation column protrudes to one side to form a connecting top, and the bottom of the isolation column protrudes to the same side to form a connecting bottom. The lower end face of the connecting part is provided with a concave connecting groove corresponding to the connecting top. The connecting top abuts in the connecting groove, and the connecting bottom abuts in the upper end face of the support base.

[0011] As a further improvement of this utility model, the upper end face of the connecting part is provided with a functional groove for exposing the functional components on the upper end face of the battery cell.

[0012] As a further improvement of this utility model, a positioning pin is provided on the upper end face of the connecting part, which is used for positioning the welding components of the battery cell.

[0013] As a further improvement of this utility model, a connecting hole is provided on the upper end face of the connecting part, and the bolt passes through the connecting hole and enters the internal thread hole on the upper end face of the battery cell to fix the battery cell in the isolation part.

[0014] As a further improvement of this utility model, the isolation structure has connecting protrusions protruding from the outer sides of the isolation columns at both ends, and the connecting protrusions are used for connection with the battery casing.

[0015] As a further improvement of this utility model, the frame and the isolation structure are made of plastic, and the frame and the isolation part are integrally formed.

[0016] As a further improvement of this utility model, the bottom of the connection extends symmetrically to both sides of the isolation plate, and the battery cell abuts against both sides of the isolation plate, respectively abutting between the bottom of the connection and the connection portion.

[0017] Beneficial effects:

[0018] This invention uses an isolation structure to separate the battery cells within the battery casing. This structure provides each cell with an independent space, reducing the possibility of direct contact between cells and preventing damage caused by external impacts, vibrations, or collisions. The isolation structure, made of non-conductive materials (such as plastic), effectively prevents short circuits between cells. This is crucial for ensuring the safe operation of the battery pack, especially in high-voltage applications, avoiding potential fire or explosion risks.

[0019] By clamping the isolation column between the support base and the connecting part, and providing protruding connecting tops and bottoms at the top and bottom of the isolation column, a tight fit is formed with the connecting groove and the upper surface of the support base, enhancing the mechanical stability of the overall structure and ensuring that the battery cell will not easily shift when subjected to vibration or impact.

[0020] The symmetrical extension of the isolation plate in the isolation structure allows for the simultaneous placement of battery cells on both sides, which makes more efficient use of space, helps to disperse heat, improves the thermal management of the battery pack, and helps maintain the optimal operating temperature of the battery cells.

[0021] The functional slot design on the upper end face of the connector exposes the functional components on the upper end face of the battery cell, facilitating installation; the positioning pin is used for precise positioning of the welding parts, reducing errors in the assembly process; and the bolts fix the battery cell through the connecting holes, making the entire assembly process simpler and faster.

[0022] The connecting protrusions on the outside of the separator can be quickly connected to the battery casing, increasing the flexibility and adaptability of the structure, making it suitable for the assembly needs of different battery pack models, and improving the product's versatility and market competitiveness.

[0023] The choice of plastic materials not only reduces weight, which aligns with the trend of lightweight development in modern transportation, but also makes plastic materials relatively easy to recycle, which helps reduce environmental pollution and conforms to the concept of sustainable development.

[0024] In summary, this utility model provides a novel plastic separator structure for rectangular battery packs that is structurally stable, safe and reliable, easy to assemble and maintain, has excellent thermal management, and high space utilization, bringing significant technological advancements to the application of electric vehicles and other energy storage systems. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a novel rectangular battery pack plastic separator structure according to the present invention;

[0026] Figure 2 A schematic diagram showing the placement of a novel rectangular battery pack using a plastic separator structure;

[0027] Figure 3 This is a schematic diagram illustrating the application of a novel rectangular cell pack plastic separator structure within a battery casing.

[0028] The markings in the diagram are as follows: 1. Frame; 11. Support column; 111. Support base; 112. Connecting protrusion; 12. Connecting part; 121. Connecting groove; 122. Functional groove; 123. Positioning pin; 124. Connecting hole; 2. Isolation structure; 21. Isolation part; 211. Isolation column; 2111. Connecting top; 2112. Connecting bottom; 212. Isolation plate; 3. Battery cell; 31. Functional component; 32. Internal threaded hole; 4. Battery casing; 5. Welded parts. Detailed Implementation

[0029] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0030] Implementation example:

[0031] like Figure 1-3 The diagram illustrates a novel rectangular battery pack structure using plastic separators. Multiple battery cells 3 are spaced apart within a battery casing 4. The structure includes a frame 1 abutting against the battery casing 3, and an isolation structure 2 housed within the frame 1. The integrally molded plastic frame 1 serves as the skeleton of this structure, providing primary mechanical support. It can withstand external pressure and the weight of the internal battery cells, ensuring the battery pack maintains stability and robustness under various conditions. The isolation structure 2 uses a non-conductive material to separate the battery cells, effectively preventing electrical connections between different cells, avoiding short circuits, and preventing damage caused by collisions between cells due to external impacts, vibrations, or impacts.

[0032] The frame 1 is supported by a support column 11, which supports the top connecting part 12. The outermost support column 11, which contacts the battery case 4, is provided with a connecting protrusion 112 protruding towards the battery case. The connecting protrusion 112 passes through the connecting groove 121 of the battery case 4, thus achieving stable placement of the frame 1 within the battery case 4. The support base 111, which protrudes relatively from the lower end of the support column 11, ensures stable placement on the bottom surface inside the battery case 4. At the same time, a connecting groove 121 is recessed in the lower end face of the connecting part 12 above the support base 111. The size of the connecting groove 121 matches the size of the connecting top 2111. The connecting part 12 is horizontally inserted from the side into the clamping space formed by the upper end face of the support base 111 and the lower end face of the connecting part 12. The connecting top 2111 entering the connecting groove 121 further ensures the stable installation of the connecting part 12 on the frame 1.

[0033] The upper end of the connecting part 12 forms a functional groove corresponding to the functional components 31 on the top of the battery cell, exposing the functional components 31 (positive and negative terminals, safety valve, BMS terminals, etc.) on the upper end of the battery cell for easy access to external circuits. Simultaneously, when the welding component 5 connects to the positive and negative terminals of the battery cell from above, it passes through the positioning pin to achieve positioning during installation. After the battery cell 3 enters the isolation part 21 below the connecting part 12, a bolt is screwed into the internal threaded hole 32 on the upper end of the battery cell through the connecting hole, further stabilizing the placement of the battery cell 3.

[0034] The isolation structure 2 consists of multiple isolation sections 21 for isolated battery cells. Each isolation section 21 is integrally molded from plastic. Two isolation posts 211 abut against the connecting groove 121 and the support base 111. Two opposing isolation posts 211 extend from the top and bottom respectively, forming a connecting top 2111 and a connecting bottom 2112. The connecting top 2111 enters the connecting groove 121, and the connecting bottom 2112 abuts against the upper surface of the support base 111. An isolation plate 212 connects the surfaces of the isolation posts 211 between the connecting top 2111 and the connecting bottom 2112. The connecting bottom 2112 is symmetrically arranged on the support base 111 relative to the isolation plate 212, allowing the battery cells to enter the placement space between the connecting bottom 2112 and the connecting section 12 from both sides of the isolation plate 212.

[0035] This invention utilizes plastic material and a one-piece molded frame and connecting parts, enabling a side-insertion installation method for the connecting parts and a battery-fixed installation method involving insertion and clamping from both sides. This significantly enhances the mechanical stability of the overall structure, ensuring that the battery cells will not easily shift under vibration or impact. Placing battery cells on both sides simultaneously improves space utilization and enhances the overall rigidity of the structure. It provides a novel rectangular battery pack plastic separator structure that is structurally stable, safe, reliable, easy to assemble and maintain, and features excellent thermal management and high space utilization. Compared to existing battery cell isolation structures, this application achieves significant improvements in several key performance indicators, bringing important technological advancements to the application of electric vehicles and other energy storage systems.

[0036] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A novel plastic separator structure for a rectangular battery cell pack, characterized in that, Includes a frame and an isolation structure mounted on the frame; The isolation structure includes a plurality of isolation sections for placing battery cells. Each isolation section includes isolation posts at both ends and an isolation plate connected between two of the isolation posts. The frame includes several support columns and a connecting part arranged above the support columns to connect adjacent support columns; an isolation part is arranged below the connecting part, a support base is arranged at the bottom of the support column, and the isolation column is arranged between the support base and the connecting part.

2. The novel rectangular cell pack plastic separator structure according to claim 1, characterized in that, The top of the isolation column abuts against the lower end face of the connecting part, and the bottom abuts against the upper end face of the support base, and is clamped between the support base and the connecting part.

3. The novel rectangular cell pack plastic separator structure according to claim 2, characterized in that, The top of the isolation column protrudes to one side to form a connecting top, and the bottom of the isolation column protrudes to the same side to form a connecting bottom. The lower end of the connecting part is provided with a recessed connecting groove corresponding to the connecting top. The connecting top abuts against the connecting groove, and the connecting bottom abuts against the upper end surface of the support base.

4. The novel rectangular cell pack plastic separator structure according to claim 1, characterized in that, The upper end face of the connection part is provided with a functional groove for exposing the functional components on the upper end face of the battery cell.

5. The novel rectangular cell pack plastic separator structure according to claim 1, characterized in that, The upper end of the connecting part is provided with a positioning pin protruding upward, which is used to position the welding components for connecting the battery cell.

6. The novel rectangular cell pack plastic separator structure according to claim 1, characterized in that, The upper end face of the connecting part is provided with a connecting hole, and the bolt passes through the connecting hole and enters the internal thread hole on the upper end face of the battery cell to fix the battery cell in the isolation part.

7. The novel rectangular cell pack plastic separator structure according to claim 1, characterized in that, The isolation structure has connecting protrusions protruding from the outer sides of the isolation columns at both ends, which are used for connecting with the battery casing.

8. The novel rectangular cell pack plastic separator structure according to claim 1, characterized in that, The frame and the isolation structure are made of plastic, and the frame and the isolation part are integrally molded.

9. The novel rectangular cell pack plastic separator structure according to claim 2, characterized in that, The bottom of the connection extends symmetrically to both sides of the isolation plate, and the battery cell abuts against both sides of the isolation plate, respectively, between the bottom of the connection and the connection portion.

Images