Sodium battery pack

Abstract

The utility model belongs to the technical field of batteries, in particular relates to a sodium battery pack, and solves the problems that the low-temperature adaptability is low, and stable and excellent discharge performance cannot be kept in a low-temperature environment. The sodium battery pack comprises a cuboid-shaped box body, an opening is formed in the upper end of the box body, an upper cover is arranged on the opening, the box body and the upper cover are sealed and fixed through a detachable structure, a cuboid-shaped sodium ion battery cell is arranged in the box body, a circuit breaker and a socket are arranged at one end of the sodium ion battery cell, and the socket is arranged at the other end of the sodium ion battery cell. The sodion battery cell is electrically connected with the socket through the circuit breaker, the box body is provided with a circuit breaker window and a socket window which can respectively enable the circuit breaker and the socket to be communicated with the outside, heat preservation cotton layers are arranged between the sodion battery cell and the box body and between the sodion battery cell and the upper cover, and the heat preservation cotton layers at least cover four surfaces of the sodion battery cell. The battery core is coated with the heat preservation cotton layer, and heat preservation is conducted on the battery core, so that the battery core has the excellent discharging performance in the low-temperature environment, and the low-temperature adaptability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a sodium battery pack. Background Art

[0002] Sodium-ion batteries are increasingly being used in related fields due to their low cost and other advantages, such as low-speed vehicles such as tricycles.

[0003] However, in low-temperature environments, such as in the north in winter, sodium-ion batteries still have poor discharge performance, cannot provide stable and sufficient voltage, and are difficult to ensure normal power supply requirements. They have low adaptability to low-temperature environments. Most sodium-ion battery packs in the existing technology do not have a simple and effective insulation structure, which makes it impossible to maintain excellent discharge performance in low-temperature environments. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a sodium battery pack.

[0005] In order to achieve the purpose of the innovative utility model, the following technical solutions can be used:

[0006] A sodium battery pack comprises a rectangular parallelepiped box, the upper end of the box is open, an upper cover is arranged on the opening, the box and the upper cover are sealed and fixed by a detachable structure, a rectangular parallelepiped sodium ion battery cell is arranged in the box, a circuit breaker and a socket are arranged at one end of the sodium ion battery cell, the sodium ion battery cell is electrically connected to the socket through the circuit breaker, a circuit breaker window and a socket window are opened on the box, which can respectively connect the circuit breaker and the socket to the outside, a thermal insulation cotton layer is arranged between the sodium ion battery cell, the box and the upper cover, and the thermal insulation cotton layer covers at least four sides of the sodium ion battery cell.

[0007] The sodium battery pack of the utility model can be applied to the field of low-speed vehicles such as tricycles. Its box body and sodium ion battery cell are both in the shape of a cuboid, which can adapt to most installation scenarios; the upper cover and the box body are detachably connected, which is convenient for disassembly and assembly, and it is convenient to load or remove the sodium ion battery cell from the opening, and it is also convenient to check and maintain the internal components; and the sealing arrangement between the box body and the upper cover prevents the entry of dust, water vapor, etc. in the external environment, so that it has a certain waterproof performance and prolongs the service life of the equipment. A socket is connected to the sodium ion battery cell, which is used for external electrical equipment to provide electrical energy to the outside. A circuit breaker is connected in series between the socket and the sodium ion battery cell, and the connection with the sodium ion battery cell can be easily cut off through the circuit breaker, which has the function of overcurrent protection and improves safety performance; the socket and the circuit breaker are connected to the outside through the circuit breaker window and the socket window, which is convenient for the operation of the circuit breaker and the connection and disconnection of the socket. The sodium-ion battery cell is also coated with a thermal insulation cotton layer to insulate the sodium-ion battery cell and ensure excellent discharge performance in a low-temperature environment. The thermal insulation cotton layer has good low-temperature adaptability. The thermal insulation cotton layer covers at least four sides to ensure sufficient thermal insulation effect.

[0008] Furthermore, the thermal insulation cotton layer covers six sides of the sodium ion battery core, providing more comprehensive thermal insulation.

[0009] As an optimization, the sodium ion battery cell, the circuit breaker and the socket are electrically connected through an 8AWG silicone wire, which ensures sufficient overcurrent capacity, prevents safety hazards caused by excessive current, and improves stability.

[0010] In the above-mentioned sodium battery pack, the sodium ion battery cell includes a battery cell frame, on which a plurality of batteries are arranged, the outer periphery of the battery cell frame is covered with a protective film, and a circuit breaker bracket and a socket bracket are provided at one end of the battery cell frame, and the circuit breaker and the socket are detachably fixed on the circuit breaker bracket and the socket bracket, respectively.

[0011] The sodium ion battery cell is formed by connecting multiple batteries in series or in other ways. Each battery is arranged on a battery cell rack and is covered with a protective film to form a sodium ion battery cell as a whole. The structure is simple, and the protective film also has a certain protection ability. The protective film can specifically be made of PVC heat shrink film; the circuit breaker and the socket are detachably arranged on the battery cell rack through the circuit breaker bracket and the socket bracket, which is convenient for disassembly and assembly, and is convenient for subsequent maintenance and replacement of the socket and the circuit breaker. The socket is preferably an Anderson socket.

[0012] In the above-mentioned sodium battery pack, a transparent flexible waterproof cover is provided outside the circuit breaker window, and a waterproof box is provided outside the socket window.

[0013] The operating end of the circuit breaker is connected to the circuit breaker window. The flexible waterproof cover on the circuit breaker window is arranged on the operating end. On the basis of not affecting the operability of the circuit breaker, the circuit breaker window is closed to prevent the entry of dust, debris, water and water vapor. The flexible waterproof cover can be made of a plastic film. The socket is connected to the socket window, and the waterproof box is arranged on the socket window. On the basis of ensuring that the electrical equipment is stably connected to the socket through the waterproof box, the socket window is closed to also prevent the entry of dust, debris, water and water vapor. The setting of the flexible waterproof cover and the waterproof box ensures excellent waterproof performance.

[0014] As an optimization, a one-way vent valve is also provided on one end of the box body located at the circuit breaker. The one-way vent valve further limits the entry of external water vapor and the like, thereby extending the service life of the internal components.

[0015] In the above-mentioned sodium battery pack, the waterproof box includes a bottom box and a box cover, the bottom of the bottom box is provided with a through hole connected to the socket window, one end of the bottom box is hingedly connected to one end of the box cover, and semicircular wire holes are provided on the other ends of the bottom box and the box cover, and the two semicircular wire holes are symmetrically arranged, and the edges of the bottom box and the box cover are provided with first sealing rings, and the first sealing rings cover the semicircular wire holes.

[0016] The waterproof box is arranged on the box body and docked with the socket window. Its through hole docks with the connection end of the socket to ensure the smooth connection of the electrical equipment. The box cover is hinged on the bottom box, which is convenient to open and close. After closing, the through hole can be sealed with the first sealing ring to prevent the entry of unnecessary debris or water vapor, etc., and improve the waterproof performance. Of course, a switch lock assembly for locking the box cover is arranged between the bottom box and the box cover on the other side away from the hinged connection position. The switch lock assembly is common knowledge and will not be specifically expanded. Semicircular wire holes are provided on the bottom box and the box cover. The two wire holes are docked and spliced ​​for the connection wires of the electrical equipment to pass through. Moreover, the first sealing ring covers the semicircular wire holes, which ensures the smooth passage of the connection wires while having a good sealing effect. As an optimization, the semicircular wire holes are located on the lower side to avoid water accumulation between the semicircular wire holes and the first sealing ring.

[0017] In the above-mentioned sodium battery pack, an L-shaped baffle is fixedly connected to the socket bracket for isolating an installation space between the sodium ion battery cell and the inner wall of the box body, the width of the installation space is greater than the width of the socket, and the socket is located in the installation space.

[0018] The L-shaped barrier strip is located between the sodium-ion battery cell and the box body, which prevents the sodium-ion battery cell from being pressed further into that side, and prevents components such as sockets and circuit breakers from being squeezed, thus playing a protective role.

[0019] In the above-mentioned sodium battery pack, a docking step is provided at the lower part of the upper cover, and the docking step is just stuck in the opening. The detachable structure includes a screw hole provided on the vertical surface of the docking step, and a connecting hole penetrating the side wall of the box body. The positions of the connecting hole and the screw hole are adapted, and the upper cover fixing bolt passes through the connecting hole and engages with the screw hole.

[0020] The upper cover is just buckled on the opening of the box body through the docking step, and the connection is stable. The detachable structure is specifically a horizontally opened connecting hole and a screw hole. The connecting bolt passes through the connecting hole and is tightened on the screw hole to limit the upper cover vertically so that the upper cover is firmly covered on the opening.

[0021] In the above-mentioned sodium battery pack, a second sealing ring is provided between the docking step and the opening, and a third sealing ring is provided between the head of the upper cover fixing bolt and the outer wall of the box body.

[0022] The second sealing ring is used to achieve the sealing between the docking step and the opening, and can be specifically arranged on the upper end surface of the edge of the box body and the horizontal plane of the docking step, or on the inner wall of the opening and the vertical plane of the docking step; the third sealing ring is arranged between the head of the upper cover fixing bolt and the box body, and the sealing between the upper cover fixing bolt and the connecting hole; the arrangement of the second sealing ring and the third sealing ring improves the sealing and waterproof performance between the upper cover and the box body.

[0023] In the above-mentioned sodium battery pack, a handle is rotatably connected to the upper cover of the box body, and a spring is provided between the rotating shaft of the handle and the upper cover to enable the handle to rotate to abut against the upper cover.

[0024] Handles are respectively arranged on both sides of the upper surface of the upper cover for easy carrying. When the handles are rotatable, springs make the handles rotate in the direction of being close to the upper cover, so that the space occupied is small.

[0025] In the above-mentioned sodium battery pack, a drying structure is provided between the box body and the sodium ion battery cell, and the drying structure comprises a square drying box. A mounting opening is provided on the side wall of the box body, and the drying box is just inserted into the mounting opening.

[0026] Although the sodium battery pack is equipped with a good sealing structure, it is inevitable that air with a certain amount of water vapor will enter during assembly, opening and closing the upper cover, etc. The water vapor may even condense to form water droplets when the temperature changes greatly, which may cause leakage, short circuit and other problems. The water vapor will also slowly corrode the internal related metals. The drying structure is used to absorb water vapor, improve stability and extend the service life of the equipment. Among them, the drying box is inserted into the box body through the installation port, and the drying box can be disassembled and assembled without opening the upper cover, which is convenient for taking out the drying box to replace or regenerate the dry particles later.

[0027] In the above-mentioned sodium battery pack, a fixed plate is provided on the side of the drying box, the fixed plate covers the installation opening and is attached to the outer side wall of the box body, a fourth sealing ring is provided between the fixed plate and the side wall of the box body, the fixed plate and the box body are detachably fixed by a bolt structure, and a fifth sealing ring is provided between the head of the drying box fixing bolt of the bolt structure and the side wall of the box body.

[0028] The side of the drying box is provided with a fixed plate surface, which is equivalent to forming a T-shape. The fixed plate surface is attached to the outside of the box body and is laterally limited. The bolt structure fixes the fixed plate surface and the box body to achieve stable and detachable installation of the drying box. The fifth sealing ring is clamped between the fixed plate surface and the outer wall of the box body to achieve the seal therebetween and ensure the waterproof performance of the sodium battery pack. Of course, the drying box contains dry particles. In addition to the side surface of the fixed plate surface, at least one of the other surfaces of the drying box is a mesh surface, and the mesh aperture of the mesh surface is smaller than the outer diameter of the dry particles. As an optimization, a handle is provided on the fixed plate surface to facilitate the disassembly and assembly of the drying box. The bolt structure therein is common knowledge and will not be elaborated in detail.

[0029] To further ensure the waterproof performance, a sixth sealing ring is provided between the bolts of the bolt structure and the outer wall of the box body.

[0030] Compared with the prior art, the utility model mainly has the following advantages:

[0031] 1. The upper cover and the box body are detachably connected, which is convenient for assembly and disassembly. It is convenient to load or remove the sodium ion battery cell from the opening, and it is also convenient to check and maintain the internal components. Moreover, the sealing setting between the box body and the upper cover prevents the entry of dust, water vapor, etc. in the external environment, so that it has a certain waterproof performance and prolongs the service life of the equipment. The sodium ion battery cell is connected with a socket for external electrical equipment to provide power to the outside. A circuit breaker is connected in series between the socket and the sodium ion battery cell. The connection with the sodium ion battery cell can be easily cut off through the circuit breaker. It has the function of overcurrent protection and improves the safety performance. The socket and the circuit breaker are connected to the outside through the circuit breaker window and the socket window, which is convenient for the operation of the circuit breaker and the connection and disconnection of the socket. The sodium ion battery cell is also coated with a thermal insulation cotton layer to insulate the sodium ion battery cell, ensure excellent discharge performance in low temperature environment, and have good low temperature adaptability. The thermal insulation cotton layer covers at least four sides to ensure sufficient thermal insulation effect.

[0032] 2. The operating end of the circuit breaker is docked in the circuit breaker window, and the flexible waterproof cover on the circuit breaker window is arranged on the operating end. On the basis of not affecting the operability of the circuit breaker, the circuit breaker window is closed to prevent the entry of dust, debris, water and water vapor. The socket is docked on the socket window, and the waterproof box is arranged on the socket window. On the basis of ensuring that the electrical equipment is stably connected to the socket through the waterproof box, the socket window is closed to also prevent the entry of dust, debris, water and water vapor.

[0033] 3. The drying structure is used to absorb water vapor in the box, improve stability, and extend the service life of the equipment. The drying box is inserted into the box through the installation port, and the drying box can be disassembled and assembled without opening the upper cover, which is convenient for taking out the drying box to replace or regenerate dry particles later, and maintenance is convenient.

[0034] 4. The sodium battery pack is provided with a first sealing ring, a second sealing ring, a third sealing ring, a fourth sealing ring, a fifth sealing ring, a sixth sealing ring, a flexible waterproof cover and a waterproof box, so that the whole has excellent waterproof performance, improves the service life of internal components, and avoids the occurrence of problems such as short circuit and leakage caused by water ingress. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure provided by the utility model;

[0036] Figure 2 It is a schematic diagram of the overall structure in which the flexible waterproof cover and the waterproof box provided by the utility model are hidden;

[0037] Figure 3 It is a top view schematic diagram of the hidden upper cover provided by the utility model;

[0038] Figure 4 It is a schematic diagram of the structure inside the box provided by the utility model;

[0039] Figure 5 It is a schematic cross-sectional view of a sodium ion battery cell (including a thermal insulation cotton layer) provided by the utility model;

[0040] Figure 6 It is a structural schematic diagram of the box provided by the utility model;

[0041] Figure 7 It is a structural schematic diagram of the upper cover provided by the utility model;

[0042] Figure 8 It is a structural schematic diagram of the sodium ion battery provided by the utility model;

[0043] Fig. 9 It is a structural schematic diagram of the drying structure provided by the utility model;

[0044] Fig.10 It is a structural schematic diagram of the waterproof box provided by the utility model.

[0045] In the figure, box body 1, opening 11, circuit breaker window 12, socket window 13, flexible waterproof cover 14, waterproof box 15, bottom box 16, box cover 17, semicircular wire hole 18, L-shaped baffle 19, installation opening 20, through hole 21, upper cover 3, docking step 31, handle 32, sodium ion battery cell 4, circuit breaker 41, socket 42, thermal insulation cotton layer 43, battery cell rack 44, battery 45, protective film 46, circuit breaker bracket 47, socket bracket 48, one-way vent valve 49, detachable structure 5, screw hole 51, connecting hole 52, drying structure 6, drying box 61, fixed plate surface 62, handle 63. DETAILED DESCRIPTION

[0046] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0047] Specific implementation examples Figure 1-10 As shown, the sodium battery pack comprises a rectangular box body 1, the upper end of the box body 1 has an opening 11, an upper cover 3 is arranged on the opening 11, the box body 1 and the upper cover 3 are sealed and fixed by a detachable structure 5, a rectangular sodium ion battery cell 4 is arranged in the box body 1, a circuit breaker 41 and a socket 42 are arranged at one end of the sodium ion battery cell 4, the sodium ion battery cell 4 is electrically connected to the socket 42 through the circuit breaker 41, the sodium ion battery cell 4, the circuit breaker 41 and the socket 42 are electrically connected through an 8AWG silicone wire, a circuit breaker window 12 and a socket window 13 are opened on the box body 1, which can respectively connect the circuit breaker 41 and the socket 42 to the outside, a heat preservation cotton layer 43 is arranged between the sodium ion battery cell 4 and the box body 1 and the upper cover 3, and the heat preservation cotton layer 43 covers six sides of the sodium ion battery cell 4.

[0048] Specifically, the sodium battery pack of this embodiment is used in a tricycle, and its box body 1 and sodium ion battery cell 4 are both in the shape of a rectangular parallelepiped; the upper cover 3 and the box body 1 are detachably connected, and the disassembly and assembly are convenient, so that the sodium ion battery cell 4 can be loaded or removed from the box body 1 through the opening 11, and it is also convenient to check and maintain the internal components; and the box body 1 and the upper cover 3 are sealed to prevent dust, water vapor, etc. from entering the external environment, so that it has a certain waterproof performance and prolongs the service life of the equipment. The sodium ion battery cell 4 is connected with a socket 42, which is used for external electrical equipment to provide electric energy to the outside. A circuit breaker 41 is connected in series between the socket 42 and the sodium ion battery cell 4, and the connection with the sodium ion battery cell 4 can be easily cut off through the circuit breaker 41, which has the function of overcurrent protection and improves the safety performance; the socket 42 and the circuit breaker 41 are connected to the outside through the circuit breaker window 12 and the socket window 13, which is convenient for the operation of the circuit breaker 41 and the connection and disconnection of the socket 42. The sodium ion battery core 4 is also coated with a heat preservation cotton layer 43 for heat preservation of the sodium ion battery core 4, ensuring excellent discharge performance in a low temperature environment, and having good low temperature adaptability. The heat preservation cotton layer 43 covers six sides of the sodium ion battery core 4, and the heat preservation is more comprehensive. The 8AWG silicone wire ensures sufficient overcurrent capacity, prevents safety hazards caused by excessive current, and improves stability.

[0049] like Figure 4 , 5 As shown in Figures 8 and 9, the sodium ion battery cell 4 includes a battery frame 44, on which a plurality of batteries 45 are arranged, and the outer periphery of the battery frame 44 is covered with a protective film 46. A circuit breaker bracket 47 and a socket bracket 48 are arranged at one end of the battery frame 44, and the circuit breaker 41 and the socket 42 are detachably fixed on the circuit breaker bracket 47 and the socket bracket 48, respectively. A transparent flexible waterproof cover 14 is arranged outside the circuit breaker window 12, and a waterproof box 15 is arranged outside the socket window 13. Moreover, a one-way vent valve 49 is also arranged on one end of the box body 1 located at the circuit breaker 41.

[0050] Specifically, the sodium ion battery cell 4 is formed by a plurality of batteries 45 connected in series in a certain manner, each battery 45 is arranged on a battery frame 44, and is coated with a protective film 46 to form a sodium ion battery cell 4 as a whole, with a simple structure, and the protective film 46 also has a certain protective ability, and the protective film 46 can specifically be made of a PVC heat shrink film; the circuit breaker 41 and the socket 42 are detachably arranged on the battery frame 44 through a circuit breaker bracket 47 and a socket bracket 48, which is convenient for disassembly and assembly, and is convenient for subsequent maintenance and replacement of the socket 42 and the circuit breaker 41, wherein the socket 42 is preferably an Anderson socket 42. The operating end of the circuit breaker 41 is docked in the circuit breaker window 12, and the flexible waterproof cover 14 on the circuit breaker window 12 is covered on the operating end, and the circuit breaker window 12 is closed without affecting the operability of the circuit breaker 41 to prevent the entry of dust, debris, water and water vapor, wherein the flexible waterproof cover 14 can be made of a plastic film. The socket 42 is connected to the socket window 13, and the waterproof box 15 is arranged on the socket window 13. On the basis of ensuring that the electrical equipment is stably connected to the socket 42 through the waterproof box 15, the socket window 13 is closed, which also prevents the entry of dust, debris, water and water vapor. The arrangement of the flexible waterproof cover 14 and the waterproof box 15 ensures excellent waterproof performance. The one-way vent valve 49 further limits the entry of external water vapor, etc., and prolongs the service life of the internal components.

[0051] As an optimization of this embodiment, the waterproof box 15 includes a base box 16 and a box cover 17. A through hole 21 communicating with the socket window 13 is provided at the bottom of the base box 16. One end of the base box 16 is hingedly connected to one end of the box cover 17. Semicircular wire holes 18 are provided on the other ends of the base box 16 and the box cover 17. The two semicircular wire holes 18 are symmetrically arranged. First sealing rings are provided at the edges of the base box 16 and the box cover 17, and the first sealing rings cover the semicircular wire holes 18.

[0052] Specifically, the waterproof box 15 is arranged on the box body 1, docked with the socket window 13, and its through hole 21 docks with the connection end of the socket 42, ensuring the smooth connection of the electrical equipment. The box cover 17 is hinged on the bottom box 16, which is convenient to open and close. After closing, the through hole 21 can be closed in cooperation with the first sealing ring to block the entry of unnecessary debris or water vapor, etc., and improve the waterproof performance. Of course, a switch lock assembly for locking the box cover 17 is provided between the bottom box 16 and the box cover 17 on the other side away from the hinged connection position. Semicircular wire holes are provided on the bottom box 16 and the box cover 17. The two wire holes are docked and spliced ​​for the connection wires of the electrical equipment to pass through. Moreover, the first sealing ring covers the semicircular wire holes, which ensures the smooth passage of the connection wires while having a good sealing effect. As an optimization, the semicircular wire hole 18 is located on the lower side to avoid water accumulation between the semicircular wire hole and the first sealing ring.

[0053] In this embodiment, an L-shaped baffle 19 is fixedly connected to the socket bracket 48 for isolating an installation space between the sodium ion battery cell 4 and the inner wall of the box body 1. The width of the installation space is greater than the width of the socket 42, and the socket 42 is located in the installation space. The L-shaped baffle 19 is located between the sodium ion battery cell 4 and the box body 1, which prevents the sodium ion battery cell 4 from being pressed further into the side, prevents the socket 42, the circuit breaker 41 and other components from being squeezed, and has a protective effect.

[0054] like Figure 1 , 6 As shown in Figures 7 and 8, a docking step 31 is provided at the lower part of the upper cover 3, and the docking step 31 is just stuck in the opening 11. The detachable structure 5 includes a screw hole 51 provided on the vertical surface of the docking step 31, and a connecting hole 52 penetrating the side wall of the box body 1. The positions of the connecting hole 52 and the screw hole 51 are adapted, and the upper cover fixing bolt passes through the connecting hole 52 and engages with the screw hole 51. A second sealing ring is provided between the docking step 31 and the opening 11, and a third sealing ring is provided between the head of the upper cover fixing bolt and the outer wall of the box body 1. A handle 32 is rotatably connected to the upper cover 3 of the box body 1, and a spring is provided between the rotating shaft of the handle 32 and the upper cover 3 to make the handle 32 have a tendency to rotate to abut against the upper cover 3.

[0055] Specifically, the upper cover 3 is just buckled on the opening 11 of the box body 1 through the docking step 31, and the connection is stable. The detachable structure 5 is specifically a connecting hole 52 and a screw hole 51 opened horizontally. The connecting bolt passes through the connecting hole 52 and is tightened on the screw hole 51, which limits the upper cover 3 vertically so that the upper cover 3 is stably covered on the opening 11. The second sealing ring is used to achieve the sealing between the docking step 31 and the opening 11, and can be specifically set on the upper end surface of the edge of the box body 1 and the horizontal surface of the docking step 31, or can be set on the inner side wall of the opening 11 and the vertical surface of the docking step 31; the third sealing ring is set between the head of the upper cover fixing bolt and the box body 1, and the sealing between the upper cover fixing bolt and the connecting hole 52; the setting of the second sealing ring and the third sealing ring improves the sealing and waterproof performance between the upper cover 3 and the box body 1. Handles 32 are respectively installed on both sides of the upper surface of the upper cover 3 for easy transportation. When the handle 32 is rotatable, the spring causes the handle 32 to rotate in the direction of abutting against the upper cover 3, and the space occupied is small.

[0056] like Figure 1 , 3As shown in , 4, 6, and 9, a drying structure 6 is provided between the box body 1 and the sodium ion battery cell 4. The drying structure 6 includes a square drying box 61. A mounting opening 20 is provided on the side wall of the box body 1, and the drying box 61 is just inserted into the mounting opening 20. A fixed plate surface 62 is provided on the side of the drying box 61. The fixed plate surface 62 covers the mounting opening 20 and is attached to the outer side wall of the box body 1. A fourth sealing ring is provided between the fixed plate surface 62 and the side wall of the box body 1. The fixed plate surface 62 and the box body 1 are detachably fixed by a bolt structure. A fifth sealing ring is provided between the head of the fixing bolt of the drying box of the bolt structure and the side wall of the box body 1. A handle 63 is provided on the fixed plate surface 62.

[0057] Specifically, the drying box 61 is inserted into the box body 1 through the installation opening 20, and the drying box 61 can be disassembled without opening the upper cover 3. The side of the drying box 61 is provided with a fixed plate surface 62, which is equivalent to forming a T-shaped shape. The fixed plate surface 62 is attached to the outside of the box body 1 and is laterally limited. The bolt structure fixes the fixed plate surface 62 and the box body 1 to achieve stable and detachable installation of the drying box 61. The fifth sealing ring is sandwiched between the fixed plate surface 62 and the outer wall of the box body 1 to achieve the seal therebetween and ensure the waterproof performance of the sodium battery pack. Of course, the drying box 61 contains dry particles. In addition to the side surface of the fixed plate surface 62, the other three side surfaces and the upper end surface of the drying box 61 are mesh surfaces (the mesh details are not shown in the figure), and the mesh aperture of the mesh surface is smaller than the outer diameter of the dry particles. The setting of the handle 63 facilitates the disassembly and assembly of the drying box 61. In addition, a sixth sealing ring is provided between the bolts of the bolt structure and the outer wall of the box body 1 to further ensure the waterproof performance.

[0058] For illustration, the upper cover fixing bolts, the drying box fixing bolts and the sealing rings are not shown in the figure.

[0059] Specific working principle: when in use, open the box cover 17, connect the electrical equipment to the socket 42 through the wire, close the box cover 17 and lock it to complete the wiring. The wire is located in the semicircular wire hole 18, open the circuit breaker 41, and the sodium ion battery 4 can supply power to the electrical equipment. The drying box 61 continues to dry the inside of the box body 1. When the dry particles react completely, open the fixed bolt structure to take out the drying box 61. After replacing or regenerating the dry particles in the box, or replacing a new drying box 61, re-insert it into the installation port 20 and fix it with the bolt structure to complete the replacement.

[0060] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A sodium battery pack, characterized in that: The invention comprises a rectangular parallelepiped box (1), wherein the upper end of the box (1) is opened (11), an upper cover (3) is arranged on the opening (11), the box (1) and the upper cover (3) are sealed and fixed by a detachable structure (5), a rectangular parallelepiped sodium ion battery cell (4) is arranged in the box (1), a circuit breaker (41) and a socket (42) are arranged at one end of the sodium ion battery cell (4), the sodium ion battery cell (4) is electrically connected to the socket (42) through the circuit breaker (41), a circuit breaker window (12) and a socket window (13) are arranged on the box (1) so as to respectively connect the circuit breaker (41) and the socket (42) to the outside, a heat-insulating cotton layer (43) is arranged between the sodium ion battery cell (4), the box (1) and the upper cover (3), and the heat-insulating cotton layer (43) covers at least four surfaces of the sodium ion battery cell (4).

2. The sodium battery pack according to claim 1, characterized in that: The sodium ion battery cell (4) comprises a battery cell frame (44), a plurality of batteries (45) are arranged on the battery cell frame (44), the outer periphery of the battery cell frame (44) is covered with a protective film (46), a circuit breaker bracket (47) and a socket bracket (48) are arranged at one end of the battery cell frame (44), and the circuit breaker (41) and the socket (42) are detachably fixed on the circuit breaker bracket (47) and the socket bracket (48), respectively.

3. The sodium battery pack according to claim 2, characterized in that: A transparent flexible waterproof cover (14) is provided outside the circuit breaker window (12), and a waterproof box (15) is provided outside the socket window (13).

4. The sodium battery pack according to claim 3, characterized in that: The waterproof box (15) comprises a bottom box (16) and a box cover (17). The bottom of the bottom box (16) is provided with a through hole (21) communicating with the socket window (13). One end of the bottom box (16) is hingedly connected to one end of the box cover (17). Semicircular wire holes (18) are provided on the other ends of the bottom box (16) and the box cover (17). The two semicircular wire holes (18) are symmetrically arranged. The edges of the bottom box (16) and the box cover (17) are provided with first sealing rings, and the first sealing rings cover the semicircular wire holes (18).

5. The sodium battery pack according to claim 2, characterized in that: An L-shaped retaining bar (19) is fixedly connected to the socket bracket (48) and is used to isolate an installation space between the sodium ion battery cell (4) and the inner wall of the box body (1). The width of the installation space is greater than the width of the socket (42), and the socket (42) is located in the installation space.

6. The sodium battery pack according to claim 1, characterized in that: The upper cover (3) is provided with a docking step (31) at the lower part, and the docking step (31) is just stuck in the opening (11). The detachable structure (5) includes a screw hole (51) arranged on the vertical surface of the docking step (31), and a connecting hole (52) penetrating the side wall of the box body (1). The positions of the connecting hole (52) and the screw hole (51) are adapted to each other, and the upper cover fixing bolt passes through the connecting hole (52) and engages with the screw hole (51).

7. The sodium battery pack according to claim 6, characterized in that: A second sealing ring is provided between the docking step (31) and the opening (11), and a third sealing ring is provided between the head of the upper cover fixing bolt and the outer wall of the box body (1).

8. The sodium battery pack according to claim 6, characterized in that: A handle (32) is rotatably connected to the upper cover (3) of the box body (1), and a spring is provided between the rotating shaft of the handle (32) and the upper cover (3) to enable the handle (32) to rotate until it is in contact with the upper cover (3).

9. The sodium battery pack according to any one of claims 1 to 8, characterized in that: A drying structure (6) is provided between the box body (1) and the sodium ion battery cell (4), the drying structure (6) comprising a square drying box (61), a mounting opening (20) is provided on the side wall of the box body (1), and the drying box (61) is exactly inserted into the mounting opening (20).

10. The sodium battery pack according to claim 9, characterized in that: The drying box (61) is provided with a fixed plate surface (62) on the side thereof, the fixed plate surface (62) covers the installation opening (20) and is in contact with the outer wall of the box body (1), a fourth sealing ring is provided between the fixed plate surface (62) and the side wall of the box body (1), the fixed plate surface (62) and the box body (1) are detachably fixed by a bolt structure, and a fifth sealing ring is provided between the head of the drying box fixing bolt of the bolt structure and the side wall of the box body (1).

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