A sodium ion battery assembly for energy storage and a method of using the same

Abstract

The present invention discloses a sodium ion battery assembly for energy storage and a method for using the same, comprising a protective shell, an explosion-proof cavity being provided at the lower end of the protective shell, and an air vent being provided on the inner wall of the explosion-proof cavity. By dividing the protective shell as a whole into two chambers, and cooperating with each other through isolation units, the sodium ion battery pack can be placed separately in a normal use state and an abnormal state, and the battery protection unit is provided to ensure that the sodium ion battery pack body can prevent its expansion speed from being too fast in the first time when it is heated and expanded, and reduce the conditions for the sodium ion battery pack body to burn, and cooperate with the falling flame retardant unit to insert the sodium ion battery pack body in a normal operating state, and once the sodium ion battery pack body expands and deforms, the falling flame retardant unit is separated from it, and the sodium ion battery pack body falls to the explosion-proof cavity under the action of gravity for isolation, and is isolated from the adjacent battery packs that have not been abnormal, to prevent joint damage.

Description

Technical Field

[0001] The present invention belongs to the technical field of sodium ion batteries, and in particular relates to a sodium ion battery assembly for energy storage and a method for using the same. Background Art

[0002] Sodium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of sodium ions between the positive and negative electrodes to work; sodium-ion batteries have a higher energy density and can store more electrical energy in a smaller volume, which helps save space in home energy storage systems. At the same time, because sodium-ion batteries have a long cycle life and can withstand a large number of charge and discharge cycles, they have a longer service life in home energy storage systems.

[0003] In the prior art, a sodium ion battery energy storage system such as publication number CN117913442A includes: a cabinet, a sodium ion battery pack and a first temperature control system. The cabinet has a cavity, an air inlet and an air outlet, and the air inlet and the air outlet are both connected to the cavity. The sodium ion battery pack is arranged in the cavity. The first temperature control system includes an air inlet drive component and an exhaust drive component, and the air inlet drive component and the exhaust drive component are both located in the cabinet, the air inlet drive component is connected to the air inlet, and the exhaust drive component is connected to the air outlet. The first temperature control system of the sodium ion battery energy storage system in the above document borrows the fire protection system in the prior art to cool and temperature control each battery pack. When the outside temperature is low, the first temperature control system can suck the outside cooling air into the cabinet, and then discharge the hot air in the cabinet, which can simultaneously achieve the effect of cooling the battery pack and discharging the combustible gas, with low energy consumption and low use cost.

[0004] In order to solve the problem of poor battery cooling efficiency, the prior art uses a fire protection system to cool and regulate the temperature of each battery pack.

[0005] However, in actual use, when a sodium-ion battery malfunctions or is damaged, a chemical reaction will occur rapidly inside it, producing a large amount of exhaust gas, causing the internal air pressure of the sodium-ion battery to increase sharply. Once the temperature exceeds the specified value, the battery will swell and even spontaneously combust. Once a single battery pack burns, it cannot be isolated from other adjacent battery packs, and a single battery pack cannot be disassembled and assembled. The entire battery pack needs to be disassembled for replacement.

[0006] Therefore, we propose a sodium-ion battery assembly for energy storage and a method of using the same to solve the problem that existing batteries cannot maintain a single battery pack. The reacting battery pack can be effectively isolated from other adjacent batteries to avoid causing collateral damage to the battery pack. Summary of the invention

[0007] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a sodium ion battery assembly for energy storage and a method of using the same, which has the advantage of being able to effectively isolate the reacting battery pack from other adjacent batteries to avoid causing collateral damage to the battery pack.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: on the one hand, a sodium ion battery assembly for energy storage comprises a protective shell, an explosion-proof cavity is arranged at the lower end of the protective shell, air holes are opened on the inner wall of the explosion-proof cavity, a protective top cover is detachably installed at the upper end of the protective shell, a battery storage mechanism is arranged inside the protective shell, the battery storage mechanism comprises an isolation unit and a battery protection unit, an explosion-proof mechanism is installed on the outer side of the lower end of the protective shell, the explosion-proof mechanism comprises an explosion-proof box and a falling flame-retardant unit.

[0009] Preferably, the isolation unit includes an isolation horizontal plate and an isolation vertical plate, the outer surface of the isolation vertical plate is movably engaged with the inner surface of the protective shell, the lower end of the isolation horizontal plate is fixedly connected to the bottom surface of the inner cavity of the explosion-proof cavity, a U-shaped groove is provided on the inner wall of the upper end of the isolation horizontal plate, the inner surface of the U-shaped groove is movably engaged with the inner wall of the embedding vertical groove provided on the inner wall of the isolation vertical plate, the isolation vertical plates are arranged in multiple groups and correspond to the U-shaped grooves, and the inner wall of the protective shell is sprayed with anti-corrosion paint, which effectively slows down the erosion rate of the inner wall by corrosive gases and electrolytes.

[0010] Preferably, the battery protection unit includes a protection storage rack, and side grooves are respectively opened on the inner walls on both sides of the protection storage rack, and the side grooves are generally "A"-shaped notch structures, and a flame-retardant partition is fixedly installed on the inner surface of the protection storage rack.

[0011] Preferably, a mounting hole is provided on the inner wall of the upper end of the protective storage rack, an upper insert is movably installed on the inner surface of the mounting hole, a sodium ion battery pack body is fixedly installed on the lower end of the upper insert, three groups of the sodium ion battery pack bodies are provided, and the three groups of the sodium ion battery pack bodies are separated by two groups of the flame retardant partitions, and a battery bottom gasket is fixedly installed on the lower end of the sodium ion battery pack body.

[0012] Preferably, heat dissipation holes are evenly opened on the inner wall of the explosion-proof box, the heat dissipation holes correspond to the air holes, the inner surface of the explosion-proof box is movably connected to the lower outer surface of the protective shell, the upper end of the explosion-proof box is fixedly provided with an extension, the lower surface of the extension is provided with an auxiliary heat dissipation component, the auxiliary heat dissipation component includes a mounting side plate fixedly installed at the lower end of the extension, and a heat dissipation fan group is installed on the inner surface of the mounting side plate.

[0013] Preferably, the falling flame retardant unit includes a fixed limit plate, the lower end of the fixed limit plate is fixedly connected to the upper surface of the extension, and the upper end of the fixed limit plate is fixedly connected to the upper end of the protective shell, and a limit groove for auxiliary limiting is opened on the inner wall of the fixed limit plate.

[0014] Preferably, a movable bracket is movably installed on the inner surface of the limiting groove, and the outer surface of the movable bracket is slidably connected to the inner walls of the protective shell and the explosion-proof box, one end of the movable bracket is movably embedded in the inner wall of a square groove preset on the inner wall of one side of the protective storage rack, and a guide rod is slidably installed on the inner wall of the movable bracket away from the protective storage rack, one end of the guide rod is fixedly connected to the outer surface of the explosion-proof box, and the other end of the guide rod is fixedly installed with an anti-drop sheet, the inner side of the anti-drop sheet is fixedly connected with an abutment spring, the other end of the abutment spring is fixedly connected to the outer surface of the movable bracket, and the abutment spring is slidably sleeved on the outside of the guide rod.

[0015] Preferably, the fall flame-retardant unit also includes a fall buffer component and an electrolyte treatment component, the fall buffer component includes a receiving seat fixedly installed at the lower end of the gasket at the bottom of the battery, the outer surface of the receiving seat is fixedly connected to the inner wall of the lower end of the protective storage rack, and the lower end of the receiving seat is fixedly installed with a polyimide buffer column and a curved elastic high-temperature alloy, the curved elastic high-temperature alloy is provided with two groups and is mirror-distributed about the central axis of the polyimide buffer column, and the lower ends of the polyimide buffer column and the curved elastic high-temperature alloy are respectively fixedly connected with elastic buffer touch plates.

[0016] Preferably, the electrolyte treatment component includes an electrolyte absorption box fixedly mounted on the bottom surface of the explosion-proof cavity, an embedding groove is provided at the upper end of the electrolyte absorption box, a filter concave plate is embedded and installed on the inner surface of the embedding groove, a drain pipe is connected through the inner wall of one side of the electrolyte absorption box, an electromagnetic valve is provided on the inner surface of the drain pipe, and an absorption box protection component is fixedly provided on the upper surface of the receiving seat.

[0017] On the other hand, a method for using a sodium ion battery assembly for energy storage comprises the following steps:

[0018] Step 1: The sodium ion battery pack bodies are respectively installed inside the protective storage racks, and the flame retardant partitions are used to achieve flame retardant isolation of adjacent batteries, and an explosion-proof box for explosion-proof is installed at the lower end of the protective shell. The air holes and heat dissipation holes are opened to achieve gas circulation, and the heat dissipation fan group is used to achieve circulating heat dissipation at the bottom of the sodium ion battery pack body;

[0019] Step 2: Install the assembled sodium ion battery pack between two groups of isolation vertical plates in sequence to realize the separation and arrangement of the battery pack, and then complete the protection of the protective shell with the protective top cover to realize the normal use of the sodium ion battery pack and the normal charging and discharging operation of the battery pack;

[0020] Step 3: Once the protective storage rack expands and deforms, the falling flame-retardant unit is separated from it, and the sodium-ion battery pack body falls into the explosion-proof cavity under the action of gravity for isolation, and is isolated from adjacent battery packs that have not experienced any abnormality;

[0021] Step 4: After the sodium ion battery pack body falls, its bottom position conflicts with the upper end of the electrolyte absorption box at the bottom of the explosion-proof cavity. The fall buffer component is added to weaken the impact force on the filter concave plate, realize the fall buffer of the sodium ion battery pack body, and prevent the filter concave plate from being deformed by external force impact;

[0022] Step 5: A single abnormal battery pack falls and is isolated separately. Finally, the operator disassembles and replaces the abnormal battery pack and thoroughly cleans the electrolyte that may have leaked.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The protective housing is divided into two chambers as a whole, and the isolation units cooperate with each other to realize the separation and placement of the sodium ion battery pack in normal use and abnormal state. The battery protection unit is set to ensure that the sodium ion battery pack body can prevent its expansion speed from being too fast in the first time when it is heated and expanded, and reduce the conditions for the sodium ion battery pack body to burn. The sodium ion battery pack body in normal operation is inserted and embedded in the falling flame retardant unit. Once the sodium ion battery pack body expands and deforms, the falling flame retardant unit is separated from it, and the sodium ion battery pack body falls to the explosion-proof cavity under the action of gravity for isolation, and is isolated from the adjacent battery packs that have not abnormalities to prevent joint damage. After the sodium ion battery pack body falls into the explosion-proof cavity, the falling buffer component and the electrolyte treatment component are used to realize buffer protection of the bottom of the battery pack, so as to avoid secondary damage to the battery pack caused by the impact force, and the electrolyte that may leak is recovered and processed to avoid the corrosion of other battery packs caused by the accumulation inside the frame, and further realize the effective isolation of the reacting battery pack and other adjacent batteries to avoid joint damage to the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0026] Figure 2 It is a three-dimensional disassembled structural schematic diagram of the present invention.

[0027] Figure 3It is a schematic diagram of the side cross-sectional structure of the present invention.

[0028] Figure 4 It is a schematic diagram of the side cross-sectional structure of the protective shell of the present invention.

[0029] Figure 5 It is a schematic diagram of the disassembled structure of the battery protection unit of the present invention.

[0030] Figure 6 It is a schematic structural diagram of the battery protection unit and the falling flame retardant unit of the present invention in a separated state.

[0031] Figure 7 For the present invention Figure 6 A is an enlarged structural diagram of FIG.

[0032] Figure 8 It is a schematic cross-sectional structural diagram of the connection between the explosion-proof box and the isolation unit of the present invention.

[0033] Fig. 9 It is a schematic diagram of the disassembled structure of the isolation horizontal plate and the isolation vertical plate of the present invention.

[0034] Fig.10 It is a schematic diagram of the structure of the battery protection unit of the present invention after falling.

[0035] Fig.11 It is a structural schematic diagram of the battery protection unit and the electrolyte processing assembly of the present invention.

[0036] Fig.12 It is a schematic structural diagram of the fall cushioning assembly of the present invention.

[0037] Fig.13 It is a schematic diagram of the half-section structure of the electrolyte treatment component of the present invention.

[0038] Fig.14 For the present invention Fig.13 Schematic diagram of the enlarged structure at B.

[0039] Fig.15 It is a schematic diagram of the structure of the absorption box protection component of the present invention.

[0040] Fig.16 It is a schematic diagram of the half-section structure of the absorption box protection component of the present invention.

[0041] Fig.17 For the present invention Fig.16 Enlarged structural diagram at C.

[0042] In the figure: 1, protective shell; 10, explosion-proof cavity; 11, vent hole; 12, protective top cover; 2, battery storage mechanism; 21, isolation unit; 211, isolation horizontal plate; 2111, U-shaped notch; 212, isolation vertical plate; 2121, embedded vertical groove; 22, battery protection unit; 221, protective storage rack; 220, side groove; 222, mounting hole; 223, flame retardant partition; 23, sodium ion battery pack body; 231, upper nesting seat; 232, battery bottom gasket; 3, explosion-proof mechanism; 31, explosion-proof box; 311, heat dissipation through hole; 32. Falling flame retardant unit; 321. Fixed limiting plate; 322. Limiting groove; 323. Movable bracket; 3231. Guide rod; 3232. Anti-drop sheet; 3233. Abutment spring; 33. Installing side plate; 331. Cooling fan assembly; 4. Falling buffer assembly; 41. Receiving seat; 411. Polyimide buffer column; 412. Curved elastic high-temperature alloy; 42. Elastic buffer touch plate; 43. Absorption box protection assembly; 5. Electrolyte treatment assembly; 51. Electrolyte absorption box; 511. Groove; 52. Filter concave plate; 53. Drain pipe. DETAILED DESCRIPTION

[0043] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] For example, see Figure 1-17The present invention provides a technical solution: a sodium ion battery assembly for energy storage, comprising a protective shell 1, an explosion-proof cavity 10 is arranged at the lower end of the protective shell 1, and an air vent 11 is opened on the inner wall of the explosion-proof cavity 10, a protective top cover 12 is detachably installed at the upper end of the protective shell 1, a battery storage mechanism 2 is arranged inside the protective shell 1, and the battery storage mechanism 2 includes an isolation unit 21 and a battery protection unit 22, and an explosion-proof mechanism 3 is installed on the outer side of the lower end of the protective shell 1, and the explosion-proof mechanism 3 includes an explosion-proof box 31 and a falling flame-retardant unit 32; by dividing the protective shell 1 as a whole into two chambers, and the isolation unit 21 cooperates with each other, the sodium ion battery pack is separated and placed in a normal use state and an abnormal state, and the battery protection unit 22 is arranged to ensure that when the sodium ion battery pack body 23 is heated and expanded, it can prevent its expansion speed from being too fast in the first time. The sodium ion battery pack body 23 has the function of reducing the combustion conditions of the sodium ion battery pack body 23, and cooperates with the falling flame retardant unit 32 to insert the sodium ion battery pack body 23 in the normal operating state. Once the sodium ion battery pack body 23 expands and deforms, the falling flame retardant unit 32 is separated from it, and the sodium ion battery pack body 23 falls to the explosion-proof cavity 10 under the action of gravity for isolation, and is isolated from the adjacent battery packs that have not experienced abnormalities to prevent joint damage. After the sodium ion battery pack body 23 falls into the explosion-proof cavity 10, it relies on the falling buffer component 4 and the electrolyte treatment component 5 to achieve buffer protection for the bottom of the battery pack, avoid secondary damage to the battery pack caused by the impact force, and realize the recovery and treatment of the electrolyte that may leak, avoid the accumulation of corrosion inside the frame that affects other battery packs, and further achieve effective isolation of the reacting battery pack and other adjacent batteries to avoid causing joint damage to the battery pack.

[0045] Embodiment 2, refer to the attached Figure 1-17On the basis of the first embodiment, in order to realize the single-group isolation protection of the sodium ion battery pack body 23 and enhance the explosion-proof and flame-retardant effect of the battery pack: the isolation unit 21 includes an isolation horizontal plate 211 and an isolation vertical plate 212, the outer surface of the isolation vertical plate 212 is movably connected to the inner surface of the protective shell 1, and the lower end of the isolation horizontal plate 211 is fixedly connected to the inner cavity bottom surface of the explosion-proof cavity 10. A U-shaped notch 2111 is provided on the inner wall of the upper end of the isolation horizontal plate 211, and the inner surface of the U-shaped notch 2111 is movably connected to the inner wall of the embedded vertical groove 2121 provided on the inner wall of the isolation vertical plate 212. The isolation vertical plate 212 is arranged in multiple groups and corresponds to the U-shaped notch 2111. The battery protection unit 22 includes a protection storage rack 221, and side grooves 220 are respectively provided on the inner walls of both sides of the protection storage rack 221. The side grooves 220 are generally in an "A"-shaped notch structure, and the inner surface of the protection storage rack 221 is fixedly installed There is a flame retardant partition 223, a mounting hole 222 is provided on the inner wall of the upper end of the protective storage rack 221, an upper insert 231 is movably installed on the inner surface of the mounting hole 222, a sodium ion battery body 23 is fixedly installed at the lower end of the upper insert 231, three groups of sodium ion battery bodies 23 are provided, and the three groups of sodium ion battery bodies 23 are separated by two groups of flame retardant partitions 223, a battery bottom gasket 232 is fixedly installed at the lower end of the sodium ion battery body 23, heat dissipation holes 311 are evenly provided on the inner wall of the explosion-proof box 31, the heat dissipation holes 311 correspond to the air holes 11, the inner surface of the explosion-proof box 31 is movably connected with the lower outer surface of the protective shell 1, an extension is fixedly added to the upper end of the explosion-proof box 31, and an auxiliary heat dissipation component is provided on the lower surface of the extension, and the auxiliary heat dissipation component includes a mounting side plate 33 fixedly installed at the lower end of the extension, and a heat dissipation fan group 331 is installed on the inner surface of the mounting side plate 33;By installing the protective storage rack 221, the sodium ion battery body 23 is reinforced, and a flame retardant partition 223 is added between the two groups of sodium ion battery bodies 23 to prevent the batteries from exploding. The protective storage rack 221 is used to promote the opening of the side groove 220 to ensure that the sodium ion battery body 23 provides a gas circulation space under normal charging and discharging conditions, thereby avoiding the closure of the protective storage rack 221. At this time, the gas circulation is realized through the heat dissipation through holes 311 evenly opened on the lower inner wall of the explosion-proof box 31. The installation side plates 33 installed on both sides of the explosion-proof box 31 are used as limit supports to prevent the heat dissipation. The fan group 331 is assembled. When the heat dissipation fan group 331 is in continuous operation, the gas is driven to enter the inner cavity of the explosion-proof chamber 10 through the heat dissipation through hole 311 and the air vent 11. The airflow rises from the bottom to the bottom of the protective storage rack 221, effectively realizing the circulation ventilation of the sodium ion battery pack body 23 in normal operation, avoiding heat accumulation during the charging and discharging process, affecting its performance, further strengthening the protection effect of the battery pack, reducing the possibility of thermal expansion or spontaneous combustion of the battery pack, so that the battery can maintain a relatively stable temperature during charging and discharging, and the heat dissipation effect is improved, while the charging and discharging efficiency of the battery is significantly improved. ;

[0046] Embodiment 3, refer to the attached Figure 1-17On the basis of the second embodiment, in order to achieve the isolation of the sodium ion battery pack body 23 that has been abnormal, so as to avoid affecting the normal battery pack next to it: the falling flame retardant unit 32 includes a fixed limiting plate 321, the lower end of the fixed limiting plate 321 is fixedly connected to the upper surface of the extension, and the upper end of the fixed limiting plate 321 is fixedly connected to the upper end of the protective shell 1, and a limiting groove 322 for auxiliary limiting is opened on the inner wall of the fixed limiting plate 321, and a movable bracket 323 is movably installed on the inner surface of the limiting groove 322, and the outer surface of the movable bracket 323 The movable bracket 323 is movably engaged with the inner wall of the square groove preset on the inner wall of one side of the protective storage rack 221, and a guide rod 3231 is slidably installed on the inner wall of the movable bracket 323 away from the protective storage rack 221. One end of the guide rod 3231 is fixedly connected to the outer surface of the explosion-proof box 31, and an anti-drop sheet 3232 is fixedly installed on the other end of the guide rod 3231. The inner side of the anti-drop sheet 3232 is fixedly connected with an abutting spring 3233. The other end of the abutting spring 3233 is fixedly connected to the movable bracket 3 The outer surface of 23 is fixedly connected, and the abutment spring 3233 is slidably sleeved on the outside of the guide rod 3231; when the sodium ion battery pack body 23 is heated and expanded, exceeding a certain predetermined temperature value, the protective storage rack 221 is deformed and expanded, and one side of the protective storage rack 221 pushes one end of the plugged movable rack 323, at which time the movable rack 323 is separated from the protective storage rack 221 by the influence of external force, and at this time the movable rack 323 moves on the surface of the guide rod 3231, and the abutment spring 3233 is stretched by the pushing force, and then, After the movable bracket 323 is completely disengaged from the preset square groove on one side of the protective storage rack 221, the protective storage rack 221 falls as a whole into the isolated explosion-proof chamber 10. At this time, the movable bracket 323 releases the restriction on the protective storage rack 221, and cooperates with the reverse elastic force of the abutment spring 3233 to drive the movable bracket 323 to be pushed back to the inner side of the protective shell 1. The reason for adding two sets of abutment springs 3233 to realize the resetting of the movable bracket 323 is to achieve the blocking of the missing groove on the upper inner wall of the protective shell 1, thereby preventing external air from entering and accelerating the combustion of the fire.

[0047] Embodiment 4, refer to the attached Figure 1-17On the basis of the third embodiment, in order to achieve buffering protection for the entire sodium ion battery pack body 23 after falling, and to recycle the electrolyte that may leak and overflow: the falling flame retardant unit 32 also includes a falling buffer component 4 and an electrolyte treatment component 5, the falling buffer component 4 includes a receiving seat 41 fixedly installed at the lower end of the battery bottom gasket 232, the outer surface of the receiving seat 41 is fixedly connected to the lower end inner wall of the protective storage rack 221, and the lower end of the receiving seat 41 is fixedly installed with a polyimide buffer column 411 and a curved elastic high-temperature alloy 412, the curved elastic high-temperature alloy 412 is provided with two groups and is centered about the polyimide buffer column 411. The axis is mirror-imaged, the lower ends of the polyimide buffer column 411 and the curved elastic high-temperature alloy 412 are respectively fixedly connected with elastic buffer touch plates 42, the electrolyte treatment component 5 includes an electrolyte absorption box 51 fixedly installed on the bottom surface of the inner cavity of the explosion-proof chamber 10, the upper end of the electrolyte absorption box 51 is provided with an embedding groove 511, the inner surface of the embedding groove 511 is embedded with a filter concave plate 52, a drain pipe 53 is connected through the inner wall of one side of the electrolyte absorption box 51, the inner cavity surface of the drain pipe 53 is provided with an electromagnetic valve, and an absorption box protection component 43 is fixedly added to the upper surface of the receiving seat 41; after the protective storage rack 221 falls abnormally into the explosion-proof chamber 10 as a whole, the isolation cross plate 211 and the isolation vertical plate 212 are used to isolate adjacent battery groups separately. At this time, the receiving seat 41 connected to the battery bottom gasket 232 at the bottom of the protective storage rack 221 is used as a connector. The elastic buffer touch plate 42 first contacts the surface of the filter concave plate 52 at the upper end of the electrolyte absorption box 51. At this time, the polyimide buffer column 411 and the curved elastic high-temperature alloy 412 are deformed by the pressure applied from the outside, and the elastic force of the two is used to weaken the external impact force, so as to achieve the dispersion of the impact force after the protective storage rack 221 falls, reduce the impact on the entire sodium ion battery pack body 23, and avoid the impact explosion of the sodium ion battery pack body 23. The receiving seat 41 at the upper end of the electrolyte absorption box 51 abuts against the bottom of the protective storage rack 221, ensuring the self-protection of the electrolyte absorption box 51. At this time, the filter concave plate 52 is embedded through the embedding groove 511. The filter concave plate 52 is embedded in the interior of the embedding groove 511 with a concave structure as a whole, which can filter and store impurities in the electrolyte. The electrolyte penetrates to the bottom of the inner cavity of the electrolyte absorption box 51 through the filter concave plate 52. When the electrolyte needs to be cleaned, the solenoid valve inside the drain pipe 53 is opened to realize the effective discharge of the electrolyte, avoid the corrosion of the equipment caused by the accumulation of the electrolyte, and further strengthen the protection of the sodium ion battery pack.

[0048] Embodiment 5, refer to the attached Figure 1-17On the basis of the fourth embodiment, the present embodiment adds an absorption box protection component 43: the absorption box protection component 43 includes an anti-collision convex rod fixedly installed on the upper surface of the electrolyte absorption box 51, a reinforcing column is fixedly installed on the central inner wall of the anti-collision convex rod, and an elastic arc-shaped curved plate is fixedly installed on the upper end of the anti-collision convex rod. The elastic arc-shaped curved plates are arranged in four groups, and the lower ends of the outer sides of the four groups of elastic arc-shaped curved plates are respectively hinged with buffer deformation elastic wires, and the other ends of the buffer deformation elastic wires are respectively hinged with the outer surface of the upper end of the anti-collision convex rod; by adding an absorption box protection component at the upper end of the electrolyte absorption box 51, it is to ensure that after the battery protection unit 22 falls as a whole, the impact force of the gravity of the falling battery protection unit 22 is avoided to cause the electrolyte absorption In order to prevent the box 51 from being damaged, when the falling buffer assembly 4 contacts the surface of the filter concave plate 52, a certain space is reserved between the bottom position of the battery protection unit 22 and the filter concave plate 52 to prevent the impact force of the falling protection storage rack 221 from causing the impact deformation of the filter concave plate 52. Through such a setting, on the one hand, the electrolyte absorption box 51 can be prevented from being damaged by external impact force, and on the other hand, the filter concave plate 52 can be prevented from being deformed, which affects the filtering effect of impurities in the leaked electrolyte and the effective discharge of the filtered electrolyte, and avoids the deformation and extrusion of the drain pipe 53 to cause the electrolyte to be blocked, so as to prevent the leaked electrolyte from accumulating inside and affecting the performance of other sodium-ion batteries, thereby further extending the service life of the entire component.

[0049] Embodiment 6, a method for using a sodium ion battery assembly for energy storage, comprising the following steps:

[0050] Step 1: The sodium ion battery pack body 23 is respectively installed inside the protective storage rack 221, and the flame retardant partition 223 is used to achieve flame retardant isolation of adjacent batteries, and an explosion-proof box 31 for explosion-proof is installed at the lower end of the protective shell 1. The air vents 11 and the heat dissipation through holes 311 are opened to achieve gas circulation, and the heat dissipation fan group 331 is used to achieve circulating heat dissipation at the bottom of the sodium ion battery pack body 23;

[0051] Step 2: Install the assembled sodium ion battery pack between the two groups of isolation vertical plates 212 in sequence to realize the separation and arrangement of the battery pack, and then complete the cover protection of the protective shell 1 with the protective top cover 12 to realize the normal use of the sodium ion battery pack and the normal charging and discharging operation of the battery pack;

[0052] Step 3: Once the protective storage rack 221 expands and deforms, the falling flame retardant unit 32 is separated from it, and the sodium ion battery pack body 23 falls into the explosion-proof chamber 10 under the action of gravity for isolation, and is isolated from the adjacent battery packs that have not experienced abnormalities;

[0053] Step 4: After the sodium ion battery body 23 falls, its bottom position conflicts with the upper end of the electrolyte absorption box 51 at the bottom of the inner cavity of the explosion-proof chamber 10, and the additional fall buffer component 4 is added to weaken the impact force on the filter concave plate 52, thereby achieving fall buffering of the sodium ion battery body 23 and preventing the filter concave plate 52 from being deformed by external force impact;

[0054] Step 5: A single abnormal battery pack falls and is isolated separately. Finally, the operator disassembles and replaces the abnormal battery pack and thoroughly cleans the electrolyte that may have leaked.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sodium ion battery assembly for energy storage, comprising a protective housing (1), Features: An explosion-proof cavity (10) is provided at the lower end of the protective shell (1), and an air vent (11) is provided on the inner wall of the explosion-proof cavity (10). A protective top cover (12) is detachably mounted on the upper end of the protective shell (1). A battery storage mechanism (2) is provided inside the protective shell (1), and the battery storage mechanism (2) includes an isolation unit (21) and a battery protection unit (22). An explosion-proof mechanism (3) is installed on the outer side of the lower end of the protective shell (1), and the explosion-proof mechanism (3) includes an explosion-proof box (31) and a falling flame retardant unit (32). The isolation unit (21) comprises an isolation horizontal plate (211) and an isolation vertical plate (212); the outer surface of the isolation vertical plate (212) is movably engaged with the inner surface of the protective housing (1); the lower end of the isolation horizontal plate (211) is fixedly connected to the inner cavity bottom surface of the explosion-proof cavity (10); a U-shaped notch (2111) is provided on the inner wall of the upper end of the isolation horizontal plate (211); the inner surface of the U-shaped notch (2111) is movably engaged with the inner wall of an inlay vertical groove (2121) provided on the inner wall of the isolation vertical plate (212); the isolation vertical plates (212) are arranged in a plurality of groups and correspond to the U-shaped notches (2111); The battery protection unit (22) comprises a protection storage rack (221), side grooves (220) are respectively provided on the inner walls on both sides of the protection storage rack (221), and the side grooves (220) are in an "A"-shaped notch structure as a whole. A flame retardant partition (223) is fixedly installed on the inner surface of the protection storage rack (221); a mounting hole (222) is provided on the inner wall at the upper end of the protection storage rack (221), and an upper insert (231) is movably installed on the inner surface of the mounting hole (222), and a sodium ion battery pack body (23) is fixedly installed at the lower end of the upper insert (231), and the sodium ion battery pack body (23) is provided in three groups, and the three groups of the sodium ion battery pack bodies (23) are separated by two groups of the flame retardant partitions (223), and a battery bottom gasket (232) is fixedly installed at the lower end of the sodium ion battery pack body (23); The inner wall of the explosion-proof box (31) is evenly provided with heat dissipation holes (311), the heat dissipation holes (311) correspond to the air holes (11), the inner surface of the explosion-proof box (31) is movably connected to the lower outer surface of the protective shell (1), an extension is fixedly provided at the upper end of the explosion-proof box (31), an auxiliary heat dissipation component is provided on the lower surface of the extension, the auxiliary heat dissipation component includes a mounting side plate (33) fixedly mounted on the lower end of the extension, and a heat dissipation fan group (331) is installed on the inner surface of the mounting side plate (33); The falling flame retardant unit (32) comprises a fixed limiting plate (321), the lower end of the fixed limiting plate (321) is fixedly connected to the upper surface of the extension, and the upper end of the fixed limiting plate (321) is fixedly connected to the upper end of the protective shell (1), and a limiting groove (322) for auxiliary limiting is provided on the inner wall of the fixed limiting plate (321); A movable bracket (323) is movably mounted on the inner surface of the limiting groove (322); the outer surface of the movable bracket (323) is slidably connected to the inner wall of the protective housing (1) and the explosion-proof box (31); one end of the movable bracket (323) is movably engaged with the inner wall of a square groove preset on one side of the inner wall of the protective storage rack (221); a guide rod (3231) is slidably mounted on the inner wall of the side of the movable bracket (323) away from the protective storage rack (221); One end of the guide rod (3231) is fixedly connected to the outer surface of the explosion-proof box (31), and the other end of the guide rod (3231) is fixedly mounted with an anti-slip sheet (3232), the inner side of the anti-slip sheet (3232) is fixedly connected with an abutment spring (3233), the other end of the abutment spring (3233) is fixedly connected to the outer surface of the movable bracket (323), and the abutment spring (3233) is slidably sleeved on the outside of the guide rod (3231).

2. A sodium ion battery assembly for energy storage according to claim 1, Features: The falling flame retardant unit (32) further comprises a falling buffer component (4) and an electrolyte treatment component (5); the falling buffer component (4) comprises a receiving seat (41) fixedly mounted on the lower end of the battery bottom gasket (232); the outer surface of the receiving seat (41) is fixedly connected to the inner wall of the lower end of the protective storage rack (221); a polyimide buffer column (411) and a curved elastic high-temperature alloy (412) are fixedly mounted on the lower end of the receiving seat (41); two groups of the curved elastic high-temperature alloy (412) are arranged and are mirror-distributed with respect to the central axis of the polyimide buffer column (411); and the lower ends of the polyimide buffer column (411) and the curved elastic high-temperature alloy (412) are respectively fixedly connected to elastic buffer touch plates (42).

3. A sodium ion battery assembly for energy storage according to claim 2, Features: The electrolyte treatment assembly (5) comprises an electrolyte absorption box (51) fixedly mounted on the bottom surface of the inner cavity of the explosion-proof cavity (10); an embedding groove (511) is provided at the upper end of the electrolyte absorption box (51); a filter concave plate (52) is embedded and mounted on the inner surface of the embedding groove (511); a drainage pipe (53) is connected through the inner wall of one side of the electrolyte absorption box (51); an electromagnetic valve is provided on the inner cavity surface of the drainage pipe (53); and an absorption box protection assembly (43) is fixedly provided on the upper surface of the receiving seat (41).

4. A method for using a sodium ion battery assembly for energy storage, which is based on the sodium ion battery assembly for energy storage described in any one of claims 1 to 3. Features: The method for using the sodium ion battery assembly for energy storage comprises the following steps: Step 1: The sodium ion battery pack bodies (23) are respectively installed inside the protective storage rack (221), and the flame retardant partition (223) is used to achieve flame retardant isolation of adjacent batteries, and an explosion-proof box (31) for explosion prevention is installed at the lower end of the protective shell (1). The air vents (11) and the heat dissipation holes (311) are provided to achieve gas circulation, and the heat dissipation fan group (331) is used to achieve circulating heat dissipation at the bottom of the sodium ion battery pack body (23); Step 2: sequentially installing the assembled sodium ion battery pack between two groups of isolation vertical plates (212) to achieve separated arrangement of the battery pack, and then completing the covering and protection of the protective housing (1) with the protective top cover (12) to achieve normal use of the sodium ion battery pack and normal charging and discharging operation of the battery pack; Step 3: Once the protective storage rack (221) expands and deforms, the falling flame retardant unit (32) separates from it, and the sodium ion battery pack body (23) falls into the explosion-proof chamber (10) under the action of gravity for isolation, and is isolated from adjacent battery packs that have not experienced any abnormality; Step 4: After the sodium ion battery pack body (23) falls, its bottom position contacts the upper end of the electrolyte absorption box (51) at the bottom of the inner cavity of the explosion-proof cavity (10), and the fall buffer component (4) is added to weaken the impact force on the filter concave plate (52), thereby achieving fall buffering of the sodium ion battery pack body (23) and preventing the filter concave plate (52) from being deformed by external force impact; Step 5: A single abnormal battery pack falls and is isolated separately. Finally, the operator disassembles and replaces the abnormal battery pack and thoroughly cleans the electrolyte that may have leaked.

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