Battery pack metal plate assembly structure of solid sodium battery

Abstract

The utility model discloses a battery pack metal plate assembly structure of a solid sodium battery. The battery pack metal plate assembly structure comprises an upper cover, a lower box body, a heat preservation assembly, an inner box and side plates, the lower box body is arranged below the upper cover and is fixedly connected with the upper cover; side plates are fixedly installed on the two sides of the lower box body and fixedly connected with the upper cover so that the lower box body, the upper cover and the side plates can define a hollow square structure, the heat preservation combination body is fixedly arranged in the square structure, and the inner box is fixedly arranged in the heat preservation combination body. According to the sodium battery PACK metal plate assembly, through reasonable design and combination of all the components, the sodium battery PACK metal plate assembly has the advantages of being easy to manufacture, low in cost, high in maintainability, convenient to carry, good in sealing and heat preservation effect, high in safety, stable in structure and the like, reliable support is provided for application of a high-temperature sodium battery in more scenes, and the sodium battery PACK metal plate assembly is suitable for popularization and application. Product popularization and application are facilitated, and development and popularization of the solid-state sodium battery technology are promoted.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a sheet metal assembly structure for a solid sodium battery pack. Background Technology

[0002] Sodium-sulfur batteries and sodium salt batteries, as two main types of high-temperature sodium batteries, offer numerous advantages. Sodium-sulfur batteries boast high energy density, five times that of lead-acid batteries, high charge-discharge efficiency, long cycle life, and are manufactured using inexpensive, non-toxic materials, primarily for stationary energy storage. Sodium salt batteries, on the other hand, feature stable product properties, high safety (intrinsically safe cells), long lifespan, wide application range, readily available and non-toxic raw materials, and simple, pollution-free waste recycling processes. They are already in use in 25 countries worldwide, involved in energy storage projects such as solar and wind power integration, peak management, and communication base stations.

[0003] However, both types of batteries currently face several challenges in their development. Sodium-sulfur batteries are primarily limited by safety concerns; sodium salt batteries, on the other hand, suffer from drawbacks in cost, maintainability, leakage in the vacuum insulation layer, and the need for high temperatures during operation. Therefore, there is an urgent need to address the issues of cost, maintenance, reliability, and ease of handling associated with high-temperature sodium batteries in order to develop a product line and promote their application.

[0004] To address the problems in related technologies, this utility model provides a sheet metal assembly structure for a solid sodium battery pack. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a sheet metal assembly structure for a solid sodium battery pack.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sheet metal assembly structure for a solid sodium battery pack includes an upper cover, a lower housing, an insulation assembly, an inner housing, and side panels.

[0008] The lower box is located below the upper cover and is fixedly connected to the upper cover; side panels are fixedly installed on both sides of the lower box and are fixedly connected to the upper cover, so that the lower box, the upper cover, and the side panels enclose a hollow square structure. The insulation assembly is fixedly installed inside the square structure, and the inner box is fixedly installed inside the insulation assembly.

[0009] Furthermore, a sealing strip is provided between the upper cover and the lower housing.

[0010] Furthermore, a handle is provided on the side panel.

[0011] Furthermore, the insulation assembly includes insulation material, which is a nanomaterial.

[0012] Furthermore, the insulation material of the insulation assembly has a thickness of 1mm to 200mm and a temperature resistance range of 25℃ to 1000℃.

[0013] Furthermore, the inner box is a conductive box.

[0014] Furthermore, the inner box includes a surrounding panel and a bottom plate, with the surrounding panel perpendicular to and fixedly connected to the bottom plate.

[0015] Furthermore, a square hole is provided at the front of the lower housing.

[0016] Furthermore, the front part of the lower housing is also provided with several welded screws.

[0017] Furthermore, the side panel is provided with a first mounting hole near the top, and the top cover is provided with a second mounting hole corresponding to the first mounting hole, so that the first mounting hole of the side panel and the second mounting hole of the top cover are fixedly connected by rivets.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. It is easy to make, which simplifies the manufacturing process and reduces the difficulty of production.

[0020] 2. Low raw material and manufacturing costs facilitate large-scale production and promotion.

[0021] 3. High maintainability, making it easy to repair and maintain when problems occur.

[0022] 4. Easy to move: The handles on both sides make it easier and less strenuous to move.

[0023] 5. Excellent sealing effect: The sealing strip design between the top cover and the lower box can effectively prevent dust and water, adapting to different environmental conditions.

[0024] 6. Excellent heat preservation effect: It adopts a nano-material heat preservation combination, which can effectively maintain the internal temperature of the battery pack and improve battery performance and life.

[0025] 7. High safety: When the inner casing assembly leaks a battery cell, it can send an alarm signal to the BMS via a sensor line to promptly address potential safety hazards.

[0026] 8. Stable structure: The components are connected and fixed in a reasonable way to form a solid overall structure, which improves the reliability and durability of the battery pack. Attached Figure Description

[0027] Figure 1 This is a structural diagram of a solid sodium battery pack sheet metal assembly provided in Embodiment 1;

[0028] Figure 2This is a cross-sectional view of the sheet metal assembly structure of a solid sodium battery pack provided in Embodiment 1;

[0029] Figure 3 This is a diagram of the upper cover structure provided in Embodiment 1;

[0030] Figure 4 This is a structural diagram of the sealing strip provided in Example 1;

[0031] Figure 5 This is a structural diagram of the lower housing provided in Embodiment 1;

[0032] Figure 6 This is a side plate structure diagram provided in Embodiment 1;

[0033] Figure 7 This is a diagram of the handle structure provided in Embodiment 1;

[0034] Figure 8 This is a structural diagram of the thermal insulation assembly provided in Example 1;

[0035] Figure 9 This is the inner box structure diagram provided in Embodiment 1;

[0036] Among them, 1. Top cover; 11. Second mounting hole; 2. Lower box body; 21. Square hole; 22. Third mounting hole; 23. Welded screw; 3. Insulation assembly; 4. Inner box; 5. Side plate; 51. First mounting hole; 6. Sealing strip; 7. Handle. Detailed Implementation

[0037] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0038] The purpose of this invention is to address the shortcomings of existing technologies by providing a sheet metal assembly structure for a solid sodium battery pack.

[0039] Example 1

[0040] This embodiment provides a sheet metal assembly structure for a solid-state sodium battery pack, such as... Figure 1-2 As shown, it includes an upper cover 1, a lower box 2, an insulation assembly 3, an inner box 4, and a side panel 5.

[0041] The lower box 2 is located below the upper cover 1 and is fixedly connected to the upper cover 1; side plates 5 are fixedly installed on both sides of the lower box 2 and are fixedly connected to the upper cover 1, so that the lower box 2, the upper cover 1, and the side plates 5 enclose a hollow square structure. The insulation assembly 3 is fixedly installed inside the square structure, and the inner box 4 is fixedly installed inside the insulation assembly 3.

[0042] like Figure 3 As shown, the upper cover 1 is designed to match the size and shape of the lower housing 2, and is a rectangular flat plate with smooth edges and a smooth surface to ensure a tight fit with the lower housing 2. Second mounting holes 11 are provided at the four corners or sides of the upper cover 1 for connection to the lower housing 2 and side panels 5 via rivets or fasteners. The position and size of the second mounting holes precisely match the corresponding holes on the lower housing 2 and side panels 5 to ensure accurate and secure connection. The upper cover 1 can be made of metal materials such as Q235, stainless steel, or nickel plate, which have good strength, rigidity, and corrosion resistance, protecting the internal components of the battery pack from external environmental influences.

[0043] The upper cover 1, together with the lower casing 2 and side panels 5, constitute the outer shell of the battery pack, protecting the internal components and preventing interference from the external environment. Simultaneously, the upper cover 1 and the lower casing 2 are connected by a sealing strip 6, forming a good seal and achieving dust and water resistance, thus improving the reliability and safety of the battery pack. Figure 4 As shown.

[0044] like Figure 5 As shown, the lower housing 2 is a rectangular sheet metal structure with openings at the top and sides and a hollow interior to accommodate other components of the battery pack. The lower housing 2 has welded edges around its perimeter for welding to the side panels 5. A square hole 21 is designed at the front of the lower housing 2, the size of which is determined by the specifications and quantity of the busbars, for leading out the internal busbars of the battery pack. In addition, eight mounting holes 23 for welding screws are pre-drilled at the front of the lower housing 2, allowing the BMS to be fixed to these holes via the welding screws 23. A third mounting hole 22 is located near the upper cover 1 on the lower housing 2. After aligning the third mounting hole 22 with the corresponding second mounting hole 11, they are connected by rivets or other fasteners. The side panels 5 are perpendicular to the bottom of the lower housing 2, and the lower housing 2 is welded to the side panels 5. The lower casing 2 is usually made of metal materials, such as Q235, stainless steel, nickel plate, etc. These materials have good strength, rigidity and corrosion resistance, and can withstand the weight of the battery pack and the pressure of the internal components, while protecting the internal components from the influence of the external environment.

[0045] The lower housing 2 serves to support and house other components. Its front square hole 21 facilitates the routing of the busbars, and the welded screw 23 at the front end is used to secure the BMS, ensuring the normal operation and management of the battery pack. Simultaneously, the lower housing 2, together with the upper cover 1, side panels 3, and other components, constitute the outer shell of the battery pack, protecting the internal components and improving the reliability and safety of the battery pack.

[0046] like Figure 6 As shown, the side panels 5 are two sheet metal structures, both rectangular in shape, with dimensions matching the two sides of the lower housing 2, and are typically perpendicular (90°) to the bottom of the lower housing 2. The edges of the side panels 5 are flat and the surface is smooth to ensure a tight fit with the lower housing 5 and other components. The upper part of the side panels 5 has a first mounting hole 51, which can be waist-shaped to mate with the second mounting hole 11 of the upper cover 1, and is fixedly connected by rivets. This connection method is adjustable within a certain dimensional range, facilitating fine-tuning of components during assembly and maintenance. The side panels 5 are installed on both sides of the lower housing 2 and welded to the lower housing 2 to form the outer casing of the battery pack. Handles 7 are also installed on the side panels 5 for handling the battery pack. The side panels 5 are typically made of metal materials such as Q235, stainless steel, or nickel plate. These materials have good strength, rigidity, and corrosion resistance, enabling them to withstand the weight of the battery pack and the influence of the external environment, ensuring the structural stability and service life of the battery pack.

[0047] The side panel 5, together with the lower housing 2, upper cover 1, and other components, constitutes the external protective structure of the battery pack, protecting internal components and improving the overall strength and rigidity of the battery pack. Simultaneously, the connection design between the first mounting hole 51 on the upper part of the side panel 5 and the upper cover allows for a degree of adjustability in the entire battery pack casing, facilitating assembly and maintenance. Furthermore, components such as the handle 7 installed on the side panel 5 provide convenience for transporting the battery pack, improving its practicality and operability. Figure 7 As shown.

[0048] like Figure 8As shown, the insulation assembly 3 has a rectangular plate-like structure, including an inner insulation layer and an outer insulation layer. The inner insulation layer is fixedly installed inside the outer insulation layer, which can be achieved through integral molding, welding, or other methods. The dimensions of the insulation assembly 3 match the internal space of the battery pack, and its thickness is generally between 1 and 200 mm, adjusted according to specific insulation requirements and battery pack dimensions. The insulation assembly 3 is set within a hollow square structure enclosed by the lower housing 2, upper cover 1, and side plate 5, and is connected to the lower housing 2, upper cover 1, and side plate 5 by adhesives, snaps, or other fixing methods. In some cases, the insulation assembly 3 may be placed directly in the corresponding position, relying on its own weight and the support of surrounding components to maintain stability. The insulation material of the insulation assembly 3 is a nanomaterial, such as nano-silica insulation board, aerogel insulation board, microporous nano-ceramic fiber board, etc. These materials have good insulation performance, low thermal conductivity, and high temperature resistance, and can maintain a stable insulation effect over a wide temperature range.

[0049] The thermal insulation assembly 3 maintains a stable internal temperature for the battery pack, reducing heat loss and the influx of external heat. This is crucial for improving battery pack performance and lifespan, especially in high or low temperature environments. The thermal insulation assembly 3 effectively reduces the impact of temperature fluctuations on the battery pack, ensuring it operates within a suitable temperature range.

[0050] like Figure 9 As shown, the inner box 4 is assembled from a surrounding panel and a bottom plate by welding, forming a rectangular box shape with a hollow interior to accommodate battery cells or other internal components. The surrounding panel and bottom plate are perpendicular to each other and welded together to form a single, enclosed cavity that fits tightly with surrounding components, creating a stable internal space. The dimensions of the inner box 4 are determined based on the specifications and quantity of the internal components of the battery pack, ensuring proper accommodation and fixation of these components. The inner box 4 is installed inside the battery pack, located within the insulation assembly 3, and connected to the insulation assembly 3 by welding or other fixing methods, for accommodating and fixing battery cells or other internal components. It may house battery cells, busbars, sensors, and other components, which are fixed to the inner box by welding or other connection methods. The inner box 4 is typically made of metal materials such as Q235, stainless steel, or nickel plate. These materials possess good strength, conductivity, and corrosion resistance, meeting the installation and usage requirements of battery cells and other internal components while ensuring the structural stability and service life of the inner box.

[0051] The inner casing 4 serves to house and secure the battery cells or other internal components. Made of highly conductive material, it allows for the transmission of signals to the BMS (Battery Management System) via sensor lines in case of leakage due to improper use of the battery cells. This triggers an alarm and prompts timely intervention, enhancing the safety of the battery pack. Furthermore, the structural design of the inner casing 4 contributes to a more uniform current distribution within the battery pack, reducing issues such as localized overheating caused by current concentration and improving the overall performance and lifespan of the battery pack.

[0052] In practical applications, these components work together to perform their functions. For example, when the battery pack is operating, the inner casing 4, as a highly conductive conductor, can detect cell leaks and issue an alarm in a timely manner; the insulation assembly 3 maintains stable internal temperature, improving battery performance and lifespan; the sealed design of the upper cover 1 and lower casing 2 prevents interference from the external environment; and the connection between the side plate 5 and the upper cover 1 and lower casing 2 ensures the stability and reliability of the overall structure. Simultaneously, the material selection and structural design of each component are also well-matched. For instance, the strength and corrosion resistance of metallic materials are adapted to the stress and environmental adaptability requirements of the components, and the thermal insulation performance of nanomaterials matches the temperature control requirements of the battery pack. This ensures that the entire battery pack can operate safely, stably, and efficiently under various conditions, meeting the needs of different application scenarios.

[0053] During assembly, the lower casing 2 is first used as the main casing component. A square hole 21 is opened at the front for the internal busbars of the battery pack to be led out. Eight welding screws 23 are pre-installed at the front for fixing the BMS. Then, the side plates 5 on both sides are welded to the lower casing 2 to form the outer casing of the battery pack. The side plates 5 are perpendicular to the bottom of the lower casing 2. Next, an insulation assembly 3 is installed inside the product. This assembly is a highly conductive material, composed of a surrounding plate and a bottom plate welded together. The surrounding plate and bottom plate are perpendicular to each other. Materials such as Q235 stainless steel and nickel plate can be used. The function of the insulation assembly 3 is to send a signal to the BMS via the internal casing sensor line when leakage occurs due to improper use of the battery cells, triggering an alarm and prompting timely handling, thus improving safety.

[0054] A sealing strip 6 is installed between the upper cover 1 and the lower housing 2. Its main function is sealing, and it can also adjust the gaps between the upper cover 1 and the internal components within a certain range, compensating for some tolerances and ensuring the overall structure's tightness and stability. The upper cover 1 and the lower housing 2 are connected by rivets or other fasteners. After connection, the sealing strip can be compressed to form a good sealing effect, meeting dustproof and waterproof requirements and adapting to various complex environmental conditions.

[0055] Both side panels 5 of the product are equipped with handles 7, with a load-bearing capacity of over 150kg, facilitating product movement during handling. The handles 7 are fixed symmetrically to the center of gravity of the overall battery pack (including BMS), ensuring balance and stability during handling, reducing labor intensity, and improving work efficiency.

[0056] This utility model's sodium battery PACK sheet metal assembly, through the rational design and combination of the above components, achieves advantages such as simple manufacturing, low cost, high maintainability, convenient transportation, good sealing and heat preservation effect, high safety, and stable structure. It provides reliable support for the application of high-temperature sodium batteries in more scenarios, which is conducive to the promotion and application of the product and promotes the development and popularization of solid-state sodium battery technology.

[0057] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A sheet metal assembly structure for a solid-state sodium battery pack, characterized in that, Includes top cover, lower box, insulation assembly, inner box, and side panels; The lower box is located below the upper cover and is fixedly connected to the upper cover; side panels are fixedly installed on both sides of the lower box and are fixedly connected to the upper cover, so that the lower box, the upper cover, and the side panels enclose a hollow square structure. The insulation assembly is fixedly installed inside the square structure, and the inner box is fixedly installed inside the insulation assembly.

2. The sheet metal assembly structure of a solid-state sodium battery pack according to claim 1, characterized in that, A sealing strip is provided between the upper cover and the lower box.

3. The sheet metal assembly structure of a solid-state sodium battery according to claim 1, characterized in that, The side panel is equipped with a handle.

4. The sheet metal assembly structure of a solid-state sodium battery pack according to claim 1, characterized in that, The insulation assembly contains insulation material, which is a nanomaterial.

5. The sheet metal assembly structure of a solid-state sodium battery according to claim 4, characterized in that, The insulation material of the insulation assembly has a thickness of 1mm to 200mm and a temperature resistance range of 25℃ to 1000℃.

6. The sheet metal assembly structure of a solid-state sodium battery according to claim 1, characterized in that, The inner box is a conductive box.

7. The sheet metal assembly structure of a solid-state sodium battery according to claim 6, characterized in that, The inner box includes a surrounding panel and a bottom plate, with the surrounding panel perpendicular to and fixedly connected to the bottom plate.

8. The sheet metal assembly structure of a solid-state sodium battery according to claim 1, characterized in that, A square hole is provided at the front of the lower housing.

9. The sheet metal assembly structure of a solid-state sodium battery according to claim 8, characterized in that, The front of the lower housing is also equipped with several welded screws.

10. The sheet metal assembly structure of a solid-state sodium battery according to claim 1, characterized in that, The side panel has a first mounting hole near the top, and the top cover has a second mounting hole corresponding to the first mounting hole, so that the first mounting hole of the side panel and the second mounting hole of the top cover are fixedly connected by rivets.

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