Maintainable high-temperature sodium battery pack

Abstract

The utility model discloses a maintainable high-temperature sodium battery pack, which comprises a box body assembly, a nanometer heat preservation assembly, a battery core assembly and a BMS (Battery Management System) module, the box body assembly comprises a top cover, a lower box body and a first sealing ring arranged in the top cover; the BMS module is arranged on the surface of one side of the lower box body, the battery cell assembly is arranged in the nanometer heat preservation assembly, openings matched with an output module of the battery cell assembly are formed in the opposite positions of the lower box body, the nanometer heat preservation assembly and the BMS module, and a second sealing ring is further arranged at the opening of the BMS module; the output module of the battery core assembly sequentially passes through the opening and is arranged in the BMS module; the nanometer heat preservation assembly is arranged in the lower box body, the top cover is arranged on the top of the lower box body through a first sealing ring, and the top cover and the lower box body are fixedly connected in a threaded connection mode.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a maintainable high-temperature sodium battery pack. Background Art

[0002] Sodium-sulfur batteries and sodium salt batteries have the advantages of high safety, high specific energy, high charge and discharge efficiency, and low cost. Both types of batteries are excellent electrochemical energy storage power sources.

[0003] Sodium-sulfur battery is a type of high-temperature sodium battery, a molten salt battery composed of liquid sodium and sulfur. This type of battery has high energy density (energy density is 5 times that of lead-acid batteries), high charge and discharge efficiency, long cycle life, and is made of cheap non-toxic materials. It is mainly used in stationary energy storage. Sodium salt battery is also a type of high-temperature sodium battery. It has the characteristics of stable product properties, high safety, long service life, wide range of applications, easy to obtain and non-toxic raw materials, and simple and pollution-free waste recycling process. It has been used in 25 countries around the world, and has built energy storage projects such as solar energy, wind power combination, peak management, and communication base stations.

[0004] At present, the main factors restricting the development of sodium salt batteries are maintainability, low IP protection level, and vibration resistance. In addition, most of the current non-vacuum high-temperature sodium salt batteries can only achieve an IP20 protection level, which is difficult to meet the use requirements under more stringent environmental conditions. At the same time, the battery cells used in the high-temperature sodium battery PACK require anti-vibration structural design when used in special fields due to their special internal battery cell structure, such as automotive and rail transportation. Therefore, it is urgent to solve the protection reliability, maintenance and environmental applicability problems of high-temperature sodium batteries. Utility Model Content

[0005] The utility model aims to provide a maintainable high-temperature sodium battery pack in view of the defects of the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A maintainable high-temperature sodium battery pack comprises a box assembly, a nano thermal insulation assembly, a battery cell assembly, and a BMS module, wherein the box assembly comprises a top cover, a lower box, and a first sealing ring arranged in the top cover; the BMS module is arranged on a side surface of the lower box, the battery cell assembly is arranged in the nano thermal insulation assembly, and openings adapted to output modules of the battery cell assembly are provided at relative positions of the lower box, the nano thermal insulation assembly, and the BMS module, and a second sealing ring is further provided at the opening of the BMS module, so that the output modules of the battery cell assembly are sequentially arranged in the BMS module through the opening; the nano thermal insulation assembly is arranged in the lower box, the top cover is arranged on the top of the lower box through the first sealing ring, and the top cover and the lower box are fixedly connected by threaded connection.

[0008] Furthermore, the lower box body includes a panel, a back panel, a bottom plate, a left side plate, and a right side plate; the panel is fixedly connected to one side of the bottom plate, the left side plate, and the right side plate by welding, respectively, the back panel is fixedly connected to the other sides of the bottom plate, the left side plate, and the right side plate by welding, one end of the left side plate is also fixedly connected to one end of the bottom plate by welding, and one end of the right side plate is also fixedly connected to the other end of the bottom plate by welding.

[0009] Furthermore, several reinforcing beams are welded on the surfaces of the top cover, back plate, bottom plate, left side plate and right side plate.

[0010] Furthermore, the bottom plate is fixedly connected to the left side plate and the right side plate via a plurality of L-shaped fixing plates.

[0011] Furthermore, the nano thermal insulation component includes an inner thermal insulation layer and an outer thermal insulation layer, the inner thermal insulation layer is arranged on the inner wall of the outer thermal insulation layer, and the battery cell assembly is arranged in the inner thermal insulation layer.

[0012] Furthermore, the BMS module is arranged on the panel surface by means of threaded connection.

[0013] Furthermore, the structure of the first sealing ring is a U-shaped card groove sealing structure, and the material is EPDM.

[0014] Furthermore, a mounting groove matched with the second sealing ring is provided on the surface of the BMS module facing the panel, so that the second sealing ring is installed in the mounting groove and fixedly connected to the panel by means of a threaded connection.

[0015] Furthermore, the second sealing ring is made of foamed silicone.

[0016] Furthermore, the nano thermal insulation layer assembly is formed by pressing fumed silica.

[0017] Compared with the prior art, the maintainable high-temperature sodium battery pack of the utility model is widely used in high-temperature sodium batteries, especially sodium-sulfur batteries, sodium salt batteries, etc. The sodium battery PACK has the advantages of simple manufacturing, high maintainability, higher protection reliability, and stronger environmental applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a maintainable high-temperature sodium battery pack provided in Example 1;

[0019] Figure 2 It is an exploded diagram of a maintainable high-temperature sodium battery pack provided in Example 1;

[0020] Figure 3 is a structural diagram of a box assembly provided in Example 1;

[0021] Figure 4 is a structural diagram of a box assembly provided in Example 1;

[0022] Figure 5 is an exploded view of the lower box provided in the first embodiment;

[0023] Figure 6 is an exploded view of the top cover provided in the first embodiment;

[0024] Figure 7 is a cross-sectional view of a box assembly provided in Embodiment 1;

[0025] Figure 8 This is a structural diagram of a nano thermal insulation component provided in Example 1;

[0026] Fig. 9 This is an exploded view of the nano thermal insulation component provided in Example 1;

[0027] Fig.10 is a cross-sectional view of a nano thermal insulation component provided in Example 1;

[0028] Fig.11 is a structural diagram of a battery cell assembly provided in Example 1;

[0029] Fig.12 It is a BMS module structure diagram provided in Example 1;

[0030] Fig.13 It is a BMS module structure diagram provided in Example 1;

[0031] Fig.14 It is a cross-sectional view of the BMS module provided in the first embodiment.

[0032] Among them, 1. Box assembly; 11. Top cover; 12. First sealing ring; 13. Panel; 131. First opening; 14. Back plate; 15. Bottom plate; 16. Left side plate; 17. Right side plate; 18. Reinforcement beam; 19. L-shaped fixing plate; 2. Nano thermal insulation assembly; 21. Inner thermal insulation layer; 22. Outer thermal insulation layer; 23. Second opening; 3. Battery cell assembly; 31. Positive and negative output modules; 4. BMS module; 41. Third opening; 42. Second sealing ring. DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] The utility model aims to provide a maintainable high-temperature sodium battery pack in view of the defects of the prior art.

[0035] Embodiment 1

[0036] This embodiment provides a maintainable high temperature sodium battery pack, such as Figure 1-14 As shown, it includes a box component 1, a nano-thermal insulation component 2, a battery cell assembly 3, and a BMS module 4; the battery cell assembly 3 is arranged in the nano-thermal insulation component 2, the nano-thermal insulation component 2 is arranged in the box component 1, and the BMS module 4 is arranged on one side surface of the box component 1.

[0037] The box assembly 1 includes a top cover 11 , a lower box body, and a first sealing ring 12 . The lower box body includes a front panel 13 , a back panel 14 , a bottom panel 15 , a left side panel 16 , and a right side panel 17 .

[0038] The panel 13 is fixedly connected to one side of the bottom plate 15, the left side plate 16, and the right side plate 17 by welding, and the back plate 14 is fixedly connected to the other sides of the bottom plate 15, the left side plate 16, and the right side plate 17 by welding, one end of the left side plate 16 is also fixedly connected to one end of the bottom plate 15 by welding, and one end of the right side plate 17 is also fixedly connected to the other end of the bottom plate 15 by welding; in this embodiment, the bottom plate 15, the left side plate 16, and the right side plate 17 can also be formed into an integral U-shaped structure by integral molding, so that the panel 13 is arranged in front of the U-shaped structure by welding, and the back plate 14 is arranged behind the U-shaped structure by welding.

[0039] The top cover 1 is made of 304 stainless steel and is composed of a top plate, two side plates, a back plate and a front plate that are integrally formed. When the top cover 1 is covered on the top of the lower box body, the back plate and the two side plates of the top cover 1 are fixedly connected to the back plate 14, the left plate 16 and the right plate 17 of the lower box body by rivet screws. Specifically: several riveted brackets are welded at the positions of the back plate 14, the left plate 16 and the right plate 17 of the lower box body near the top cover 1, so that the back plate and the two side plates of the top cover 1 are fixedly connected to the riveted brackets by rivet screws.

[0040] The material of the first sealing ring 12 is EPDM (ethylene propylene diene monomer), which has a long service life and high cold and heat resistance. The first sealing ring 12 is a U-shaped card groove sealing structure, so that one side of the first sealing ring 12 fits tightly to the inside of the top cover 1, and the U-shaped card groove on the other side of the first sealing ring 12 is plugged into the top of the lower box body, so that the top cover 1 can be sealed on the top of the lower box body, so that the assembled box assembly 1 has the function of waterproof and dustproof.

[0041] Two reinforcing beams 18 are welded on the surfaces of the back plate 14, the bottom plate 15, the left plate 16, and the right plate 17 of the lower box body. In this embodiment, the lower box body is provided with a total of 8 reinforcing beams 18; 8 L-shaped fixing plates 19 are also welded at the bottom of the bottom plate 15, 4 L-shaped fixing plates 19 are also welded in one of the reinforcing beams 18 of the bottom 15, and the other 4 L-shaped fixing plates 19 are also welded in another reinforcing beam 18 of the bottom 15; this embodiment is described by taking one of the reinforcing beams 18 of the bottom 15 as an example, specifically: 2 The horizontal plate of an L-shaped fixing plate 19 is welded inside one end of the bottom plate 15 reinforcement beam 18, the vertical plates of two L-shaped fixing plates 19 are welded inside one end of the left side plate 16 reinforcement beam 18, the horizontal plates of another two L-shaped fixing plates 19 are welded inside the other end of the bottom plate 15 reinforcement beam 18, and the vertical plates of another two L-shaped fixing plates 19 are welded inside one end of the right side plate 17 reinforcement beam 18, thereby improving the stability of the lower box structure.

[0042] A first opening 131 is provided at a middle position of the panel 13 of the lower box body near the top, and threaded connection structures are provided at the four corners of the first opening.

[0043] The welding position of the box assembly 1 of this embodiment is determined according to the center of gravity of the battery assembly 3. The welding method is resistance welding, and the welding points are evenly distributed, which can not only ensure the welding strength, but also reduce the welding deformation and maintain the beauty of the product. At the same time, the structure can greatly improve the overall rigidity, so that the battery assembly 3 can also ensure the safety of the battery in a suspended state or in a vibration environment. The lower box is welded by full welding to ensure the welding quality and protection level of the product. In addition, there are M8 rivet nuts on the reinforcing beams of the left plate 16 and the right plate 17, which is convenient for the installation and fixation of the battery assembly 3 with the external entity, and it is more practical. The function of the riveted bracket on the lower box is to realize the cover assembly of the battery assembly 3 by fixing with rivets with the top cover 11 assembly. Its "J"-shaped structure can fix the rivets on the outside of the box, which is convenient for installation and effectively improves the overall protection level and the maintainability of the battery assembly 3; the two reinforcing beams on the top of the top cover 11 are spot welded, and the welding points are evenly distributed, which ensures the overall strength of the top cover 11 and improves the compression and deformation resistance of the battery assembly 3.

[0044] The nano thermal insulation component 2 is pressed from fumed silica and has a good thermal insulation effect, which plays a decisive role in the thermal insulation of high-temperature sodium batteries; the nano thermal insulation component 2 includes an inner thermal insulation layer 21 and an outer thermal insulation layer 22, the inner thermal insulation layer 21 covers the inner wall of the outer thermal insulation layer 22, and the outer thermal insulation layer 22 is fixedly connected to the panel 13 and the back plate 14 of the lower box by welding; a second opening 23 is provided at a position near the middle of the top of the inner thermal insulation layer 21 and the outer thermal insulation layer 22 and corresponding to the first opening 131, so that when the battery cell assembly 3 is installed in the inner thermal insulation layer 21, the positive and negative output modules 31 of the battery cell assembly 3 pass through the second opening 23 and the first opening 131 in sequence.

[0045] The nano-insulation layer component 2 of the present embodiment is composed of nano-insulation plates of different sizes. When the battery cell assembly 3 is installed in the nano-insulation layer component 2, the nano-insulation layer component 2 is welded with the panel 13 and the back panel 14 in the lower box to ensure the interference fit between the nano-insulation layer component 2 and the lower box, which can reduce the relative movement of the insulation layer, effectively ensure the integrity of the nano-insulation layer 2, and reduce the gaps between the nano-insulation layers 3, so as to have higher insulation performance, which can not only simplify the processing technology during the installation of the battery assembly 3, but also ensure the reuse of the inner insulation layer 21 when the battery fails and needs maintenance in the later stage. At the same time, the nano-insulation component 2 itself is a shock-absorbing and energy-dissipating product, which can make the battery assembly 3 have certain shock-proof performance.

[0046] The BMS module 4 is installed on the surface of the panel 13 of the lower box. Fixing holes are opened near the four corners of the BMS module 4 so that the BMS module 4 can be fixedly installed on the panel 13 of the lower box through the fixing holes by threaded connection, thereby fixing the BMS module 4 to the lower box.

[0047] A third opening 41 is provided at a position of the BMS module 4 corresponding to the first opening 131 , so that the positive and negative output modules 31 of the battery cell assembly 3 pass through the second opening 23 , the first opening 131 , and the third opening 41 in sequence and are arranged inside the BMS module 4 , and are electrically connected to the corresponding structure inside the BMS module 4 .

[0048] A mounting groove is provided on the surface of the third opening 41 so that the second sealing ring 42 can be installed in the mounting groove. Mounting holes that are compatible with the threaded connection structure at the first opening 131 are provided at the four corners corresponding to the second sealing ring 42 and the mounting groove, so that the threaded connection structure passes through the mounting hole and is fixedly installed by a nut, thereby fixing the BMS template 4, the second sealing ring 42, and the panel 13 in connection.

[0049] The material of the second sealing ring 42 is foamed silicone, which has a long life and high cold and heat resistance. There are 2mm thick stop washers in the four installation holes of the second sealing ring 42. When the second sealing ring 42 is compressed from the original 4mm thickness to 2mm, effective sealing is completed. Its main function is to ensure the sealing protection of the positive and negative output modules 31 of the battery cell assembly 3.

[0050] The first sealing ring 12 and the second sealing ring 42 provided in this embodiment are easy to install and can make the protection level of the battery reach IP65, which can effectively reduce the heat loss inside the battery pack and make the battery assembly 3 more environmentally adaptable.

[0051] It should be noted that the connection method between the BMS module 4 of this embodiment and the positive and negative output modules 31 of the battery cell assembly 3 can be implemented according to the existing technology, and will not be described in detail in this embodiment.

[0052] The utility model discloses a maintainable high-temperature sodium battery pack, which is widely used in high-temperature sodium batteries, especially sodium-sulfur batteries, sodium salt batteries, etc. The sodium battery PACK has the advantages of simple manufacture, high maintainability, higher protection reliability, stronger environmental applicability, etc.

[0053] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A maintainable high temperature sodium battery pack, characterized in that: It includes a box assembly, a nano-thermal insulation assembly, a battery cell assembly, and a BMS module. The box assembly includes a top cover, a lower box, and a first sealing ring arranged in the top cover; the BMS module is arranged on a side surface of the lower box, the battery cell assembly is arranged in the nano-thermal insulation assembly, and openings compatible with the output modules of the battery cell assembly are opened at relative positions of the lower box, the nano-thermal insulation assembly, and the BMS module. A second sealing ring is also provided at the opening of the BMS module, so that the output modules of the battery cell assembly can be sequentially passed through the openings and arranged in the BMS module; the nano-thermal insulation assembly is arranged in the lower box, the top cover is arranged on the top of the lower box through the first sealing ring, and the top cover and the lower box are fixedly connected by threaded connection.

2. A maintainable high temperature sodium battery pack according to claim 1, characterized in that: The lower box body includes a front panel, a back panel, a bottom panel, a left side panel, and a right side panel; the front panel is fixedly connected to one side of the bottom panel, the left side panel, and the right side panel by welding, respectively; the back panel is fixedly connected to the other sides of the bottom panel, the left side panel, and the right side panel by welding, respectively; one end of the left side panel is also fixedly connected to one end of the bottom panel by welding, and one end of the right side panel is also fixedly connected to the other end of the bottom panel by welding.

3. A maintainable high temperature sodium battery pack according to claim 2, characterized in that: Several reinforcing beams are welded on the surfaces of the top cover, back plate, bottom plate, left side plate and right side plate.

4. A maintainable high temperature sodium battery pack according to claim 3, characterized in that: The bottom plate is fixedly connected to the left side plate and the right side plate by a plurality of L-shaped fixing plates.

5. A maintainable high temperature sodium battery pack according to claim 4, characterized in that: The nano thermal insulation component comprises an inner thermal insulation layer and an outer thermal insulation layer. The inner thermal insulation layer is arranged on the inner wall of the outer thermal insulation layer, and the battery core assembly is arranged in the inner thermal insulation layer.

6. A maintainable high temperature sodium battery pack according to claim 5, characterized in that: The BMS module is arranged on the panel surface by means of threaded connection.

7. A maintainable high temperature sodium battery pack according to claim 2, characterized in that: The structure of the first sealing ring is a U-shaped card groove sealing structure, and the material is EPDM.

8. A maintainable high temperature sodium battery pack according to claim 6, characterized in that: The surface of the BMS module facing the panel is provided with a mounting groove matched with the second sealing ring, so that the second sealing ring is installed in the mounting groove and fixedly connected to the panel by means of threaded connection.

9. A maintainable high temperature sodium battery pack according to claim 4, characterized in that: The second sealing ring is made of foamed silicone.

10. A maintainable high temperature sodium battery pack according to claim 5, characterized in that: The nano thermal insulation component is formed by pressing fumed silicon dioxide.

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