High energy sodium battery structural member

Abstract

The utility model discloses a high energy sodium electric battery structural member belongs to battery technical field, including sodium battery apron, and its characterized in that: lower apron is split type structure, and the split lower apron is detachably connected through the mortise -and -tenon structure on the side wall, the first boss is symmetrically arranged in the both sides of lower apron, and the lower end surface of first boss is provided with the first slot that embeds with the outer extension edge of pole, and the pole is sealedly matched through the first slot of sealing washer, the second boss is symmetrically arranged in the both sides of upper apron, and the lower end surface of second boss is provided with the second slot that embeds with first boss, the utility model has the beneficial effects that: lower apron is split type structure, has solved the problem that lower plastic processing difficulty increases, the first slot has played the role of giving way to first boss, and the capacity of sodium battery shell has been promoted to a certain extent, has increased the force point of lower apron and upper apron, has improved the stability of lower apron greatly, and has improved the stability of split type structure's lower apron.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a high-energy sodium battery structural component. Background Technology

[0002] The battery cover is a common structure in batteries, typically using a two-color injection-molded cover. The cover employs an in-mold injection molding structure, and the explosion-proof valve and cover are connected by laser welding. After welding, the airtightness of the explosion-proof valve and cover must be ensured to have a helium leak rate not exceeding 1*10^-7 Pa.m^3 / s, and the burst pressure must be such that it can rupture and release gas promptly at 0.8±0.2 MPa. Furthermore, after 10 cycles of a breath test with a continuous pressure of 0.15 MPa applied from the inside out and from the outside in, the explosion-proof sheet must still rupture and release gas promptly at 0.8±0.2 MPa. During injection molding, the components are first assembled in the injection mold, and then the terminals, sealing ring, lower plastic, and cover are assembled sequentially from bottom to top, followed by overall injection molding.

[0003] The sodium battery cover also adopts a two-color injection-molded cover structure. The positive electrode post is made of 1060 aluminum, and the negative electrode post is also made of copper-1060 aluminum. While conventional lithium battery cover negative electrode connectors are designed with copper as the negative electrode material, the sodium battery negative electrode material is designed to be the same as the positive electrode material, thus reducing raw material costs. The electrolyte uses sodium salts that are more abundant in nature, such as sodium hexafluorophosphate and sodium perchlorate.

[0004] To reduce battery costs while maintaining the energy density of sodium batteries, their size is larger than that of ordinary ternary lithium batteries and lithium iron phosphate batteries; the requirements for equipment during production are also higher. The size of the plastic substrate is twice that of a conventional plastic substrate, which increases the difficulty of processing the substrate. Utility Model Content

[0005] To address the aforementioned problems and overcome the shortcomings of existing technologies, this utility model provides a high-energy sodium battery structural component.

[0006] The first technical challenge was ensuring the energy density of sodium batteries. These batteries were also larger than those of ordinary ternary lithium batteries and lithium iron phosphate batteries, placing higher demands on equipment during production. The size of the plastic inserts was twice that of conventional inserts, increasing the difficulty of plastic processing.

[0007] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: the high-energy sodium battery structural component includes a sodium battery cover plate, wherein the sodium battery cover plate includes an upper plastic plate, an upper cover plate, a lower cover plate, a sealing ring, and an electrode post; characterized in that:

[0008] The lower cover plate is a split structure, and the split lower cover plates can be detachably connected by mortise and tenon structures on the side walls.

[0009] The lower cover plate is symmetrically provided with first protrusions on both sides. The first protrusion has a through hole for inserting the pole post in the center of its axis. The lower end face of the first protrusion has a first groove that fits into the outer edge of the pole post. The pole post is sealed by the first groove through the sealing ring.

[0010] The upper cover plate is symmetrically provided with second protrusions on both sides. The second protrusions have through holes for inserting pole posts at their axial center. The lower end face of the second protrusions has a second slot that fits into the first protrusion. The inner sidewall of the through hole of the second protrusions is provided with a preset number of slots in a ring matrix.

[0011] Furthermore, the sodium battery cover is a two-color injection molded cover structure, which is disposed on the top of the sodium battery casing.

[0012] Furthermore, the pole post passes through the upper cover plate and the lower cover plate and is integrally formed with the second protrusion of the upper cover plate by thermoplastic molding through the upper plastic plate.

[0013] Furthermore, the upper cover plate is equipped with an explosion-proof valve, and a protective patch is provided on the top of the explosion-proof valve.

[0014] Furthermore, an explosion-proof compartment is provided on the lower cover plate.

[0015] The beneficial effects of this utility model are:

[0016] One advantage of this utility model is that the lower cover plate is a split structure, and the split lower cover plate can be detachably connected by tenon and mortise on the side wall; it solves the problem that the size of the lower plastic of sodium battery is twice as large as that of conventional lower plastic, which increases the difficulty of processing the lower plastic.

[0017] One advantage of this utility model is that: the lower cover plate is symmetrically provided with first protrusions on both sides, and the lower end face of the first protrusion is provided with a first slot that fits into the outer edge of the electrode post. The first slot makes way for the first protrusion, which improves the capacity of the sodium battery casing to a certain extent.

[0018] One advantage of this invention is that the second slot of the upper cover plate fits into the first protrusion of the lower cover plate, increasing the force-bearing points of the lower cover plate and the upper cover plate, greatly improving the stability of the lower cover plate, and enhancing the stability of the split structure lower cover plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the sodium battery cover structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the sodium battery cover plate of this utility model;

[0023] Figure 5 This is a schematic diagram of the exploded structure of the sodium battery cover plate of this utility model;

[0024] In the diagram: 1. Sodium battery casing, 2. Terminal post, 3. Upper plastic plate, 4. Protective patch, 5. Lower cover plate, 6. Upper cover plate, 7. Mortise and tenon structure, 8. Explosion-proof valve, 9. Explosion-proof chamber, 10. Sealing ring, 11. First boss, 12. First slot, 13. Second slot, 14. Second boss, 15. Slot, 16. Through hole. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "rear," "lower left," "upper right," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] The specific embodiment of this utility model: The high-energy sodium battery structural component includes a sodium battery cover plate, which comprises an upper plastic plate 3, an upper cover plate 6, a lower cover plate 5, a sealing ring 10, and an electrode post 2; the improvement of this utility model is as follows:

[0027] The lower cover plate 5 is configured as a split structure, and the split lower cover plates 5 are detachably connected to each other.

[0028] As a preferred embodiment of this utility model, the detachable method can be any one of bolt connection, riveting connection, or mortise and tenon structure;

[0029] In this way, the five separate lower cover plates are smaller, reducing the difficulty of manufacturing; however, the stability of the five separate lower cover plates is poor. To solve this problem, our company conducted further research:

[0030] The lower cover plate 5 is symmetrically provided with first protrusions 11 on both sides. The first protrusions 11 have through holes 16 for inserting pole posts 2 at their axial center. The lower end face of the first protrusions 11 has a first groove 12 that fits into the outer edge of the pole post 2. The pole post 2 is sealed by the first groove 12 through the sealing ring 10.

[0031] The upper cover plate 6 is symmetrically provided with second protrusions 14 on both sides. The second protrusions 14 have through holes 16 for inserting pole posts 2 at their axial center. The lower end face of the second protrusions 14 has a second slot 13 that fits into the first protrusion 11. The inner sidewall of the through hole 16 of the second protrusions 14 is provided with a preset number of slots 15 in a ring matrix.

[0032] In this way, the second slot 13 of the upper cover plate 6 fits into the first protrusion 11 of the lower cover plate 5, increasing the force-bearing points of the lower cover plate 5 and the upper cover plate 6, and improving the stability of the lower cover plate 5 of the split structure.

[0033] In addition, this utility model unexpectedly discovered:

[0034] The lower cover plate 5 has symmetrical first protrusions 11 on both sides. The lower end face of the first protrusion 11 has a first slot 12 that fits into the outer edge of the pole post 2. The first slot 12 makes way for the first protrusion 11, which improves the capacity of the sodium battery casing to a certain extent.

[0035] As a supplement, the sodium battery cover is a two-color injection molded cover structure, which is set on the top of the sodium battery casing 1.

[0036] The pole post 2 passes through the upper cover plate 6 and the lower cover plate 5 and is integrally formed with the second protrusion 14 of the upper cover plate 6 by thermoplastic molding through the upper plastic plate 3. This technology belongs to the prior art and will not be described in detail here.

[0037] Typically: the upper cover plate 6 is equipped with an explosion-proof valve 8, the top of the explosion-proof valve 8 is equipped with a protective patch 4, and the lower cover plate 5 is equipped with an explosion-proof compartment 9.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-energy sodium battery structural component, comprising a sodium battery cover plate, wherein the sodium battery cover plate comprises an upper plastic plate (3), an upper cover plate (6), a lower cover plate (5), a sealing ring (10), and an electrode post (2); characterized in that: The lower cover plate (5) is a split structure, and the split lower cover plate (5) can be detached and connected. The lower cover plate (5) is symmetrically provided with first bosses (11) on both sides. The first bosses (11) have through holes (16) for inserting pole posts (2) on their axial center. The lower end face of the first bosses (11) has a first slot (12) that fits into the outer edge of the pole post (2). The pole post (2) is sealed by the sealing ring (10) and the first slot (12). The upper cover plate (6) is symmetrically provided with second protrusions (14) on both sides. The second protrusion (14) has a through hole (16) for inserting the pole post (2) on its axis. The lower end face of the second protrusion (14) has a second slot (13) that fits into the first protrusion (11). The inner side wall of the through hole (16) of the second protrusion (14) is provided with a preset number of slots (15) in a ring matrix.

2. The high-energy sodium battery structural component according to claim 1, characterized in that... The sodium battery cover is a two-color injection molded cover and is located on top of the sodium battery casing (1).

3. The high-energy sodium battery structural component according to claim 1, characterized in that... The pole post (2) passes through the upper cover plate (6) and the lower cover plate (5) and is thermoplastically integrally formed with the second protrusion (14) of the upper cover plate (6) through the upper plastic plate (3).

4. The high-energy sodium battery structural component according to claim 1, characterized in that... The upper cover plate (6) is provided with an explosion-proof valve (8), and a protective patch (4) is provided on the top of the explosion-proof valve (8).

5. The high-energy sodium battery structural component according to claim 4, characterized in that... An explosion-proof compartment (9) is provided on the lower cover plate (5).

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