Sodium battery soft package module

Abstract

The utility model relates to a sodium battery soft package module which comprises a shell, a soft package battery cell group and a battery management system, the soft package battery cell group comprises a plurality of soft package battery cells which are arranged in sequence, and two open type positioning frames are arranged on two sides of the periphery of the soft package battery cell group. The positioning frames extend oppositely and define a limiting space, the soft package battery cell group is located in the limiting space, limiting plates are arranged outside the positioning frames on the two sides, the limiting plates are tightly attached to the side walls of the positioning frames and located on the two sides of the soft package battery cell group, and the positioning frames are wrapped with at least two tightening belts. The two sides of the tightening belt are tightly attached to the limiting plates on the two sides respectively. Due to the existence of the limiting plate and the lacing belt, the soft package battery cell group is limited and fixed, meanwhile, the occupied space of the battery cell module is not excessively increased, the structure is simple, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to a battery shell structure, in particular to a sodium battery soft package module. Background Art

[0002] Sodium-ion battery is a new type of energy storage technology. Compared with lithium battery, it has lower raw material cost, better safety and higher energy density. It can be used in portable product structure. The working principle of sodium-ion battery is similar to that of lithium-ion battery. Due to its abundant stock, it will gradually become one of the main batteries with development. Sodium battery will swell after multiple cycles, which will affect the battery life. Therefore, it is necessary to limit it to prevent it from swelling and ensure its cycle life. The existing sodium battery limit structure is complex. The plate is bent and welded to form a rectangular frame outside the battery pack, which will make the battery pack occupy more space and occupy more space in the portable product structure. Utility Model Content

[0003] The utility model aims to provide a sodium battery soft pack module, which solves the problem of complex limiting structure of the existing sodium battery soft pack module.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The utility model provides a sodium battery soft-pack module, comprising a shell, a soft-pack battery cell group arranged in the shell, and a battery management system, wherein the soft-pack battery cell group comprises a plurality of soft-pack battery cells arranged in sequence, and is characterized in that two open positioning frames are arranged on both sides of the outer periphery of the soft-pack battery cell group, the positioning frames extend oppositely and define a limited space, the soft-pack battery cell group is located in the limited space, limiting plates are arranged outside the positioning frames on both sides, the limiting plates are arranged closely to the side walls of the positioning frames and are located on both sides of the soft-pack battery cell group, and the positioning frame is coated with at least two tightening belts, and the two sides of the tightening belt are respectively arranged closely to the limiting plates on both sides.

[0006] Preferably, a plurality of protrusions are provided on the limiting plate, and the protrusions extend in a direction away from the soft-pack battery cell group.

[0007] Preferably, the limiting plate is a metal plate structure and is an integrally formed structure with the protrusion.

[0008] Preferably, the positioning frame includes a horizontal plate and vertical plates connected to both sides of the horizontal plate, the vertical plates of the positioning frame on both sides extend oppositely, the horizontal plate is tightly attached to both sides of the soft-pack battery cell group, and the limiting plate is tightly attached to the outer wall of the horizontal plate.

[0009] Preferably, the tightening belt is an integrally formed steel belt structure.

[0010] Preferably, the positioning frame is an insulating plastic structure.

[0011] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0012] The sodium battery soft-pack module of the utility model comprises a shell, a soft-pack battery cell group arranged in the shell and a battery management system. Positioning frames on both sides first soft-position the soft-pack battery cell group, and then limiting plates are arranged on both sides of the positioning frame. The limiting plates further strengthen the limitation of the positioning frame, and then a certain pressure is applied to set a tightening belt outside the limiting plate, and the limiting plates and the positioning frame on both sides are tightened to achieve the limitation and fixation of the soft-pack battery module. The existence of the limiting plate and the tightening belt not only limits and fixes the soft-pack battery cell group, but also does not increase the occupied space of the battery cell module too much. The structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the structure of the embodiment of the utility model without the shell;

[0015] Figure 2 This is a structural cross-sectional view of an embodiment of the utility model without the housing, the tightening belt and the limiting plate;

[0016] Figure 3 It is a structural schematic diagram of the limiting plate of the utility model.

[0017] The reference numerals are described as follows:

[0018] 1. Soft-pack battery cell, 21. horizontal plate; 22. vertical plate; 3. limiting plate; 31. protrusion; 32. groove; 33. through hole; 4. tightening belt; 5. battery management system. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the implementation of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the technical features involved in the different implementations of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] like Figure 1 and Figure 2 As shown, this example includes a top shell, a group of soft-pack battery cells 1 arranged in the shell, and a battery management system 5. The battery management system 5 is arranged at the upper end of the group of soft-pack battery cells 1. The group of soft-pack battery cells 1 includes a plurality of soft-pack battery cells 1 arranged in sequence. Two open positioning frames are arranged on both sides of the periphery of the group of soft-pack battery cells 1. The positioning frame includes a horizontal plate and vertical plates 22 connected to both sides of the horizontal plate. The vertical plates 22 of the positioning frames on both sides extend oppositely respectively, and are used to define the front and rear sides of the group of soft-pack battery cells 1, and the horizontal plate 21 is tightly attached to the left and right sides of the group of soft-pack battery cells 1. The positioning frames on both sides extend oppositely and define a limited space, and the group of soft-pack battery cells 1 is confined therein, so as to achieve preliminary limitation of the soft-pack battery cells 1. Since it is a soft-pack battery, in order to ensure insulation, the positioning frame must be selected as an insulating plastic structure, and to avoid damaging the battery cells, the positioning frame generally uses a soft plastic structure, which is generally difficult to play a complete limiting and fixing structure, and can only perform simple preliminary limiting.

[0022] Limiting plates 3 are arranged outside the horizontal plates 21 of the positioning frames on both sides. The limiting plates 3 are arranged close to the horizontal plates 21 and are located on the left and right sides of the soft-pack battery cell 1 group. The limiting plates 3 on both sides further limit the positioning frame, clamp the positioning frame, and then apply a certain external force to put the tightening belt 4 outside the limiting plates 3 on both sides, further tighten and position the positioning frame, and then fix the battery module. In this example, the positioning frame is covered with two tightening belts 4, which are respectively covered on the upper and lower parts of the limiting plates 3. Grooves 32 are arranged on the upper and lower parts of the end surfaces on both sides of the limiting plates 3. The tightening belt 4 is arranged at the groove 32. The groove 32 is arranged to facilitate the positioning of the tightening belt 4 and help the tightening belt 4 to be set horizontally.

[0023] like Figure 3As shown, the limiting plate 3 is provided with a plurality of protrusions 31, and the protrusions 31 extend in a direction away from the soft-pack battery cell 1 group. The protrusions 31 act as reinforcing ribs in this example. When the battery swells greatly, the protrusions 31 protrude outward 31 to avoid deformation of the limiting plate 3, and at the same time bear part of the deformation force, thereby minimizing the deformation of the limiting plate 3, thereby improving the service life of the limiting plate 3. The limiting plate 3 is a metal plate structure and is an integrally formed structure with the protrusions 31. In this example, a stamped iron plate structure is selected. The limiting plate 3 is provided with a through hole 33 for heat dissipation of the battery cell module.

[0024] The tightening belt 4 is an integrally formed steel belt structure, which is not easily deformed and tightens the positioning frame as much as possible to control the expansion of the soft-pack battery cell 1 within a certain range.

[0025] During specific use, the soft-packed sodium cells are arranged in sequence, and then the cell management system and the cells are connected. The positioning frame is initially positioned, and the limiting plate 3 is placed accordingly. Then, the tightening belt 4 is sleeved on the outside of the limiting plate 3. After comprehensive limitation and positioning are achieved, the coated cell module is placed in the shell and sealed, thereby realizing the assembly and limitation of the sodium battery soft-pack module.

[0026] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A sodium battery soft-pack module, comprising a housing, a soft-pack battery cell group arranged in the housing, and a battery management system, wherein the soft-pack battery cell group comprises a plurality of soft-pack battery cells arranged in sequence, characterized in that: Two open positioning frames are arranged on both sides of the outer periphery of the soft-pack battery cell group, and the positioning frames extend oppositely and define a limited space. The soft-pack battery cell group is located in the limited space, and limiting plates are arranged outside the positioning frames on both sides. The limiting plates are arranged close to the side walls of the positioning frames and are located on both sides of the soft-pack battery cell group. The outside of the positioning frame is covered with at least two tightening belts, and the two sides of the tightening belts are respectively arranged close to the limiting plates on both sides.

2. A sodium battery soft pack module according to claim 1, characterized in that: The limiting plate is provided with a plurality of protrusions, and the protrusions extend in a direction away from the soft-pack battery cell group.

3. The sodium battery soft pack module according to claim 1, characterized in that: The limiting plate is a metal plate structure and is an integrally formed structure with the protrusion.

4. The sodium battery soft pack module according to claim 1, characterized in that: The positioning frame includes a horizontal plate and vertical plates connected to both sides of the horizontal plate, the vertical plates of the positioning frame on both sides extend oppositely, the horizontal plate is tightly attached to both sides of the soft-pack battery cell group, and the limiting plate is tightly attached to the outer wall of the horizontal plate.

5. The sodium battery soft pack module according to claim 1, characterized in that: The tightening belt is an integrally formed steel belt structure.

6. The sodium battery soft pack module according to claim 1, characterized in that: The positioning frame is an insulating plastic structure.

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