Sodium battery PACK ventilation structure

Abstract

The invention belongs to the technical field of sodium battery accessories, and particularly relates to a sodium battery PACK ventilation structure which comprises an outer shell and a whole set of sodium batteries. The outer shell comprises a U-shaped bottom shell from the left side, an upper sealing plate, a left sealing plate and a right sealing plate are respectively mounted at the top, the left side and the right side of the bottom shell through bolts, and a cavity for accommodating the whole group of sodium batteries is defined by the bottom shell, the upper sealing plate, the left sealing plate and the right sealing plate. According to the invention, a stable forced ventilation airflow channel is formed through the clearance fit among the exhaust fan, the ventilation holes and the battery pack, so that the heat generated during the working of the battery can be quickly discharged, and the heat dissipation efficiency is effectively improved; meanwhile, the BMS battery management system controls the exhaust fan to switch corresponding rotating speed gears in different temperature threshold intervals according to temperature data collected by the temperature sensor, self-adaptive adjustment of the heat dissipation intensity is achieved, on the premise that the heat dissipation effect is guaranteed, energy consumption is reduced, and good energy-saving performance is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of sodium battery accessories, and particularly to a ventilation structure for a sodium battery PACK. Background Art

[0002] As a new type of energy storage battery, sodium batteries have advantages such as low cost, rich resources, and high safety, and have broad application prospects in energy storage power stations, new energy vehicles and other fields. During the operation of a sodium battery PACK, heat is generated. If the heat cannot be dissipated in time, it will cause the battery temperature to rise, affecting the charge and discharge performance and cycle life of the battery, and may even cause potential safety hazards in severe cases.

[0003] The existing ventilation structures of sodium battery PACKs mostly adopt natural ventilation or forced ventilation with a fixed rotation speed. The natural ventilation has a low heat dissipation efficiency and is difficult to meet the heat dissipation requirements of high-power sodium battery PACKs; the forced ventilation with a fixed rotation speed cannot adaptively adjust the ventilation intensity according to the change of battery temperature, resulting in problems such as high energy consumption or untimely heat dissipation. At the same time, the internal structure stability of the existing sodium battery PACKs is insufficient, and the battery pack is prone to shaking and collision during transportation or use, affecting the reliability of the electrical connection of the battery, further reducing the use safety and service life of the sodium battery PACK. Therefore, a ventilation structure for a sodium battery PACK needs to be developed. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] To solve the above technical problems, according to one aspect of the present invention, the following technical solutions are provided:

[0006] A ventilation structure for a sodium battery PACK, which includes an outer shell and a whole group of sodium batteries;

[0007] The outer shell includes a bottom shell that is "凵"-shaped when viewed from the left side. The top, left side, and right side of the bottom shell are respectively installed with an upper sealing plate, a left sealing plate, and a right sealing plate through bolts. The bottom shell, the upper sealing plate, the left sealing plate, and the right sealing plate enclose a cavity for accommodating the whole group of sodium batteries. An air extraction fan is installed on the side wall of the left sealing plate by bolt embedding, and a ventilation hole for air flow is opened on the side wall of the right sealing plate;

[0008] The complete sodium battery pack includes an upper assembly frame and a lower assembly frame arranged symmetrically in the horizontal direction. Multiple vertical battery packs are arranged in an array between the upper assembly frame and the lower assembly frame. Each battery pack consists of multiple vertically arrayed batteries, and a gap is left between each battery to allow airflow.

[0009] The cavity is equipped with a BMS battery management system, which is electrically connected to the entire sodium battery pack to collect battery temperature data in real time. The BMS battery management system is also connected to the exhaust fan via a signal. The BMS battery management system presets multiple temperature threshold ranges, and each temperature threshold range corresponds to a preset speed setting of the exhaust fan. When the battery temperature is in different threshold ranges, the exhaust fan automatically switches to the corresponding speed setting.

[0010] As a preferred embodiment of the ventilation structure of a sodium battery PACK according to the present invention, a dust filter is installed on the side wall of the right sealing plate by bolts, and the mesh size of the dust filter is smaller than the diameter of the ventilation hole.

[0011] In a preferred embodiment of the sodium battery PACK ventilation structure described in this invention, multiple battery packs are arranged alternately in opposite directions. The upper and lower end faces of the upper and lower assembly frames are respectively provided with connection ports for the positive and negative terminals of the battery packs to be exposed. Multiple upper conductive plates are provided above the upper assembly frame to contact one end of the positive and negative terminals of the multiple battery packs. Multiple lower conductive plates are provided below the lower assembly frame to contact the other end of the positive and negative terminals of the multiple battery packs. All the battery packs form a series circuit through the upper and lower conductive plates.

[0012] In a preferred embodiment of the sodium battery PACK ventilation structure described in this invention, the upper assembly frame and the lower assembly frame are respectively composed of multiple upper sub-frames and lower sub-frames spliced ​​together. The upper sub-frames and lower sub-frames are generally rectangular plates. Multiple vertical assembly blocks are fixedly protruding from two adjacent sides of the upper and lower sub-frames at equal intervals. Assembly slots for fitting and connecting the assembly blocks are recessed at equal intervals from two other adjacent sides of the upper and lower sub-frames. The assembly slots are dovetail-shaped. An upper insulating partition and a lower insulating partition are respectively attached to the top of the upper conductive plate and the bottom of the lower conductive plate. An upper buffer plate and a lower buffer plate are respectively attached to the top of the upper insulating partition and the bottom of the lower insulating partition.

[0013] As a preferred solution of a sodium battery PACK ventilation structure according to the present invention, wherein: a stable holder is installed inside the cavity through bolts. The stable holder is in a "mouth" shape in the side view direction, and the upper surface of the inner top of the stable holder is closely attached to the upper surface of the upper buffer plate, and the lower surface of the inner bottom of the stable holder is closely attached to the lower surface of the lower buffer plate. Stable holding plates are respectively arranged at the front and rear of the inner side of the stable holder, and a plurality of slots for the assembly inserts to be inserted are equally spaced up and down on the side wall of the stable holder.

[0014] As a preferred solution of a sodium battery PACK ventilation structure according to the present invention, wherein: the sides of the two upper conductive plates on the leftmost side are respectively convexly fixedly provided with a positive electrode plate and a negative electrode plate. The positive electrode column and the negative electrode column are respectively installed on the left side of the left sealing plate through bolts. One end of the positive electrode column and the negative electrode column extends into the cavity. The positive electrode plate and the positive electrode column are connected by bolts and a positive electrode connecting plate, and the negative electrode plate and the negative electrode column are connected by bolts and a negative electrode connecting plate.

[0015] As a preferred solution of a sodium battery PACK ventilation structure according to the present invention, wherein: a plurality of temperature sensors are installed at a position close to the battery pack inside the cavity. The plurality of temperature sensors are evenly distributed among multiple groups of battery packs, and all the temperature sensors are signal-connected to the BMS battery management system for collecting battery temperature data in different regions and feeding it back to the BMS battery management system.

[0016] As a preferred solution of a sodium battery PACK ventilation structure according to the present invention, wherein: the temperature threshold range at least includes a low-temperature range, a normal-temperature range, a high-temperature range, and an ultra-high-temperature range;

[0017] Among them, the test temperature of the low-temperature range is less than or equal to 30 °C;

[0018] The test temperature of the normal-temperature range is greater than 30 °C and less than or equal to 45 °C;

[0019] The test temperature of the high-temperature range is greater than 45 °C and less than or equal to 60 °C;

[0020] The test temperature of the ultra-high-temperature range is greater than or equal to 60 °C.

[0021] As a preferred solution of a sodium battery PACK ventilation structure according to the present invention, wherein: an alarm indicator light electrically connected to the BMS battery management system is installed on the outer side wall of the left sealing plate. When the battery temperature is in the ultra-high-temperature range and lasts for more than 5 minutes, the BMS battery management system controls the alarm indicator light to flash an alarm signal and at the same time controls the exhaust fan to operate at the highest speed.

[0022] The beneficial effects of the present invention are:

[0023] 1. By coordinating the gaps between the exhaust fan, ventilation holes, and battery pack, a stable forced ventilation airflow channel is formed, which can quickly dissipate the heat generated during battery operation and effectively improve heat dissipation efficiency. At the same time, the BMS battery management system controls the exhaust fan to switch the corresponding speed level in different temperature threshold ranges based on the temperature data collected by the temperature sensor, realizing adaptive adjustment of heat dissipation intensity. While ensuring heat dissipation effect, it reduces energy consumption and has good energy-saving performance.

[0024] 2. The upper and lower assembly frames adopt a sub-frame splicing structure. The assembly blocks cooperate with the dovetail-shaped assembly slots, which are firmly spliced ​​and easy to disassemble and maintain. At the same time, the stable retainer and the stable retainer plate fix the entire sodium battery pack from multiple directions, which effectively improves the structural stability of the sodium battery PACK, reduces the shaking and collision of the battery pack during transportation or use, and ensures the reliability of electrical connections.

[0025] 3. The upper and lower insulating partitions improve electrical safety and prevent short circuit accidents; the upper and lower buffer plates can absorb vibration and impact, reducing damage to components; the alarm indicator light will promptly sound an alarm when the temperature is too high, making it easier for staff to handle abnormalities in a timely manner. These designs together improve the safety and service life of the sodium battery PACK. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal components of the bottom shell and the upper sealing plate of the present invention;

[0029] Figure 3 This is an exploded view of the present invention;

[0030] Figure 4 For the present invention Figure 3 Exploded view of the middle components;

[0031] Figure 5 For the present invention Figure 4 Exploded view of the middle components;

[0032] Figure 6 This is a schematic diagram of the upper and lower sub-frames of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the stabilizing cage and stabilizing plate of the present invention;

[0034] Figure 8 For the present invention Figure 2 A schematic diagram of the structure from the side view.

[0035] In the diagram: 100 - Outer shell; 101 - Bottom shell; 102 - Upper sealing plate; 103 - Left sealing plate; 104 - Right sealing plate; 105 - Exhaust fan; 106 - Ventilation hole; 200 - Complete sodium battery pack; 201 - Upper assembly frame; 202 - Lower assembly frame; 203 - Battery pack; 204 - Connection port; 205 - Upper conductive plate; 206 - Lower conductive plate; 207 - Upper subframe; 208 - Lower subframe; 209 - Assembly plug; 210 - Assembly Slot; 211-Upper insulating partition; 212-Lower insulating partition; 213-Upper buffer plate; 214-Lower buffer plate; 215-Stable retainer; 216-Stable retainer plate; 217-Card slot; 218-Positive electrode plate; 219-Negative electrode plate; 220-Positive electrode post; 221-Negative electrode post; 222-Positive electrode connection plate; 223-Negative electrode connection plate; 300-BMS battery management system; 301-Temperature sensor; 302-Alarm indicator light. Detailed Implementation

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0039] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0040] Please see Figures 1-8 The diagram shows a structural schematic of an embodiment of a sodium battery PACK ventilation structure according to the present invention. Please refer to [link / reference]. Figures 1-8, a detailed introduction to a ventilation structure of a sodium battery PACK is provided.

[0041] A ventilation structure of a sodium battery PACK includes a housing 100 and a set of sodium batteries 200. The housing 100 includes a bottom shell 101 that呈“凵”字状 when viewed from the left side. The length of the bottom shell 101 is designed to fit the size of the set of sodium batteries 200. The top, left, and right sides of the bottom shell 101 are respectively installed with an upper cover plate 102, a left cover plate 103, and a right cover plate 104 by bolts. The bottom shell 101, the upper cover plate 102, the left cover plate 103, and the right cover plate 104 enclose a cavity for accommodating the set of sodium batteries 200. The size of this cavity is adapted to the external dimensions of the set of sodium batteries 200, providing a stable installation space for the set of sodium batteries 200. A suction fan 105 is installed on the side wall of the left cover plate 103 by bolt embedding, and ventilation holes 106 for air flow are opened on the side wall of the right cover plate 104. The ventilation holes 106 are arranged in an array. The arrayed ventilation holes 106 can ensure uniform air inflow into the cavity, cooperate with the suction fan 105 to form a stable air flow channel, and effectively improve the heat dissipation efficiency.

[0042] The set of sodium batteries 200 includes a horizontally arranged upper assembly frame 201 and a lower assembly frame 202 that are symmetrically arranged up and down. Multiple sets of vertical battery groups 203 are arranged in an array between the upper assembly frame 201 and the lower assembly frame 202. Each set of battery groups 203 is composed of multiple vertically arrayed batteries, and there are gaps for air flow left between each battery, enabling the air flow to pass through the battery groups 203 smoothly, fully contact the battery surface,带走 the heat generated during battery operation,有助于提升散热的均匀性,进而改善电池的工作环境,延长电池的使用寿命.

[0043] A BMS battery management system 300 is installed in the cavity. The installation position of the BMS battery management system 300 is close to the side of the left cover plate 103, facilitating signal connection with the suction fan 105 and the temperature sensor 301. The BMS battery management system 300 is electrically connected to the set of sodium batteries 200 to collect battery temperature data in real time, and the BMS battery management system 300 is signal-connected to the suction fan 105. The BMS battery management system 300 presets multiple temperature threshold intervals, and each temperature threshold interval corresponds to a preset rotation speed gear of the suction fan 105. When the battery temperature is in different threshold intervals, the suction fan 105 automatically switches to the corresponding rotation speed gear. This adaptive rotation speed adjustment method can accurately control the heat dissipation intensity according to the battery temperature change, reduce energy consumption while ensuring the heat dissipation effect, and has a good energy-saving effect.

[0044] A dust filter is installed on the side wall of the right sealing plate 104 by bolts. The mesh size is smaller than the opening of the ventilation hole 106. The dust filter can effectively block dust, particulate matter and other impurities in the air from entering the cavity, preventing impurities from adhering to the battery surface or entering the battery, affecting the battery's electrical performance and heat dissipation effect, and at the same time helping to extend the service life of the exhaust fan 105 and the battery.

[0045] Multiple battery packs 203 are arranged alternately in opposite directions. The upper and lower end faces of the upper assembly frame 201 and the lower assembly frame 202 are respectively opened with connection ports 204 for the positive and negative ends of the battery packs 203 to be exposed. The number of connection ports 204 is the same as the number of battery packs 203, and the diameter of the ports is adapted to the diameter of the positive and negative ends of the battery packs 203. Multiple upper conductive plates 205 are arranged above the upper assembly frame 201, which are in contact with one end of the positive and negative ends of the multiple battery packs 203. Multiple lower conductive plates 206 are arranged below the lower assembly frame 202, which are in contact with the other end of the positive and negative ends of the multiple battery packs 203. All the battery packs 203 form a series circuit through the upper conductive plates 205 and the lower conductive plates 206. This series connection method can ensure stable current transmission between the battery packs 203. At the same time, the structural design of the upper conductive plates 205 and the lower conductive plates 206 facilitates installation and maintenance and helps to improve assembly efficiency.

[0046] The upper assembly frame 201 and the lower assembly frame 202 are respectively composed of multiple upper sub-frames 207 and lower sub-frames 208. The upper sub-frames 207 and lower sub-frames 208 are generally rectangular plates. Multiple vertical assembly blocks 209 are fixedly and fixedly protruding at equal intervals on two adjacent sides of the upper sub-frames 207 and lower sub-frames 208. Assembly slots 210 are recessed at equal intervals on two other adjacent sides of the upper sub-frames 207 and lower sub-frames 208 to fit and connect with the assembly blocks 209. The assembly slots 210 are dovetail-shaped, and the dovetail-shaped assembly slots 210 and assembly blocks 209 have good connection stability. Qualitatively, it can effectively prevent the upper sub-frame 207 and the lower sub-frame 208 from loosening or shifting after splicing, and improve the overall structural strength of the upper assembly frame 201 and the lower assembly frame 202. The top of the upper conductive plate 205 and the bottom of the lower conductive plate 206 are respectively attached to the upper insulating partition 211 and the lower insulating partition 212. The top of the upper insulating partition 211 and the bottom of the lower insulating partition 212 are respectively attached to the upper buffer plate 213 and the lower buffer plate 214, which can appropriately absorb the vibration and impact generated during transportation or use, reduce damage to the battery pack 203 and the conductive plate, and extend the service life of the sodium battery PACK.

[0047] Inside the cavity, a stable cage 215 is installed by bolts. The stable cage 215 is in a "square" shape when viewed from the side. The inner top of the stable cage 215 is closely attached to the upper surface of the upper buffer plate 213, and the inner bottom of the stable cage 215 is closely attached to the lower surface of the lower buffer plate 214. On the front and back sides inside the stable cage 215, stable holding plates 216 are respectively arranged and fixedly connected to the stable cage 215 by welding. At equal intervals up and down on the side wall of the stable cage 215, a plurality of slots 217 for the assembly inserts 209 to be inserted into are provided. The number and size of the slots 217 are adapted to the assembly inserts 209. The cooperation of the stable cage 215 and the stable holding plates 216 can fix the whole set of sodium batteries 200 from four directions of up, down, front and back, effectively improving the installation stability of the whole set of sodium batteries 200 in the cavity, preventing the battery pack 203 from shaking or displacing, and ensuring the reliability of the electrical connection;

[0048] On the sides of the two upper conductive plates 205 located on the leftmost side, a positive plate 218 and a negative plate 219 are respectively convexly and fixedly arranged. On the left side of the left sealing plate 103, a positive electrode column 220 and a negative electrode column 221 are respectively installed by bolts. One end of the positive electrode column 220 and the negative electrode column 221 extends into the cavity. The positive plate 218 and the positive electrode column 220 are connected by bolts and a positive connection plate 222, and the negative plate 219 and the negative electrode column 221 are connected by bolts and a negative connection plate 223;

[0049] A plurality of temperature sensors 301 are installed at a position in the cavity close to the battery pack 203. The plurality of temperature sensors 301 are evenly distributed among the multiple battery packs 203, and all the temperature sensors 301 are signal-connected to the BMS battery management system 300, and are used to collect battery temperature data in different regions and feedback it to the BMS battery management system 300. The plurality of evenly distributed temperature sensors 301 can comprehensively and accurately collect the temperature information of different regions of the battery pack 203, provide a reliable decision-making basis for the BMS battery management system 300, and make the speed adjustment of the exhaust fan 105 more accurate;

[0050] The temperature threshold range at least includes a low-temperature range, a normal-temperature range, a high-temperature range and an ultra-high-temperature range; among them, the test temperature in the low-temperature range is less than or equal to 30 °C; the test temperature in the normal-temperature range is greater than 30 °C and less than or equal to 45 °C; the test temperature in the high-temperature range is greater than 45 °C and less than or equal to 60 °C; the test temperature in the ultra-high-temperature range is greater than or equal to 60 °C. This division of the temperature range conforms to the working temperature characteristics of sodium batteries and can cover the temperature change range of sodium batteries under different working conditions;

[0051] An alarm indicator 302, electrically connected to the BMS battery management system 300, is installed on the outer wall of the left sealing plate 103. When the battery temperature is in the overheating range and lasts for more than 5 minutes, the BMS battery management system 300 controls the alarm indicator 302 to flash an alarm signal and simultaneously controls the exhaust fan 105 to run at its highest speed. The alarm indicator 302 can promptly remind the staff that the sodium battery PACK has an overheating abnormality, so that the staff can take timely measures to avoid safety accidents. The exhaust fan 105 running at its highest speed can maximize heat dissipation efficiency, quickly reduce the battery temperature, and ensure the safe operation of the sodium battery PACK.

[0052] During use, the heat generated by the battery pack 203 is dissipated into the cavity through the gaps between the batteries in the sodium battery pack's ventilation structure. Temperature sensor 301 transmits the collected temperature data to the BMS (Battery Management System) 300. The BMS 300 determines the temperature threshold range and controls the exhaust fan 105 to operate at the corresponding speed. Outside air, filtered through a dust filter, enters the cavity through ventilation holes 106, exchanges heat with the battery pack 203, and is then exhausted from the cavity by the exhaust fan 105, achieving rapid heat dissipation. When the battery temperature is too high, alarm indicator 302 promptly sounds an alarm, alerting personnel to take action and ensuring the safe and stable operation of the sodium battery pack.

[0053] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sodium battery PACK ventilation structure, comprising a housing (100) and a set of sodium batteries (200), characterized in that: The housing (100) includes a bottom shell (101) in the shape of a "U" when viewed from the left side. The top, left side, and right side of the bottom shell (101) are respectively installed with an upper cover plate (102), a left cover plate (103), and a right cover plate (104) by bolts. The bottom shell (101), the upper cover plate (102), the left cover plate (103), and the right cover plate (104) enclose a cavity for accommodating the set of sodium batteries (200). An exhaust fan (105) is installed on the side wall of the left cover plate (103) by bolt embedding, and a ventilation hole (106) for air flow is opened on the side wall of the right cover plate (104); The set of sodium batteries (200) includes a horizontally arranged upper assembly frame (201) and a lower assembly frame (202) which are symmetrically arranged up and down. A plurality of vertical battery groups (203) are arranged in an array between the upper assembly frame (201) and the lower assembly frame (202). Each battery group (203) is composed of multiple vertically arranged batteries, and a gap for air flow is reserved between each battery; A BMS battery management system (300) is installed in the cavity. The BMS battery management system (300) is electrically connected to the set of sodium batteries (200) to collect battery temperature data in real time, and the BMS battery management system (300) is signal-connected to the exhaust fan (105). The BMS battery management system (300) presets multiple temperature threshold intervals, and each temperature threshold interval corresponds to a preset speed gear of the exhaust fan (105). When the battery temperature is in different threshold intervals, the exhaust fan (105) automatically switches to the corresponding speed gear.

2. The sodium battery PACK ventilation structure according to claim 1, characterized in that: A dust-proof filter screen is installed on the side wall of the right cover plate (104) by bolts, and the pore diameter of the dust-proof filter screen is smaller than the diameter of the ventilation hole (106).

3. The ventilation structure of a sodium battery PACK according to claim 1, characterized in that: The multiple battery groups (203) are arranged in an alternating positive and negative manner group by group. Connection ports (204) for the positive and negative ends of the battery groups (203) to leak out are respectively opened on the upper and lower end faces of the upper assembly frame (201) and the lower assembly frame (202). Above the upper assembly frame (201), there are multiple upper conductive plates (205) in contact with one end of the positive and negative ends of the multiple battery groups (203), and below the lower assembly frame (202), there are multiple lower conductive plates (206) in contact with the other end of the positive and negative ends of the multiple battery groups (203). All the battery groups (203) form a series circuit through the upper conductive plates (205) and the lower conductive plates (206).

4. The ventilation structure of a sodium battery PACK according to claim 3, characterized in that: The upper assembly frame (201) and the lower assembly frame (202) are respectively formed by splicing a plurality of upper sub - frames (207) and lower sub - frames (208). The upper sub - frames (207) and the lower sub - frames (208) are in the shape of rectangular plates as a whole. On two adjacent side edges of the upper sub - frames (207) and the lower sub - frames (208), a plurality of vertical assembly insertion blocks (209) are fixedly protruded at equal intervals. On the other two adjacent side edges of the upper sub - frames (207) and the lower sub - frames (208), a plurality of assembly slots (210) for fitting and connecting with the assembly insertion blocks (209) are recessed at equal intervals. The assembly slots (210) are in the shape of dovetail grooves. On the top of the upper conductive plate (205) and the bottom of the lower conductive plate (206), an upper insulating partition (211) and a lower insulating partition (212) are respectively arranged in a fitting manner. On the top of the upper insulating partition (211) and the bottom of the lower insulating partition (212), an upper buffer plate (213) and a lower buffer plate (214) are respectively arranged in a fitting manner.

5. A sodium battery PACK ventilation structure according to claim 4, characterized in that: A stable holder (215) is installed inside the cavity by bolts. The stable holder (215) is in the shape of a "square" in the side - view direction. The inner top of the stable holder (215) is closely attached to the upper surface of the upper buffer plate (213), and the inner bottom of the stable holder (215) is closely attached to the lower surface of the lower buffer plate (214). Stable holding plates (216) are respectively arranged at the front and back inside the stable holder (215). A plurality of slots (217) for the assembly insertion blocks (209) to be inserted into are arranged at equal intervals up and down on the side walls of the stable holder (215).

6. The ventilation structure of a sodium battery PACK according to claim 3, characterized in that: On the side edges of the two left - most upper conductive plates (205), a positive electrode plate (218) and a negative electrode plate (219) are respectively protruded and fixed. On the left side of the left sealing plate (103), a positive electrode column (220) and a negative electrode column (221) are respectively installed by bolts. One ends of the positive electrode column (220) and the negative electrode column (221) extend into the cavity. The positive electrode plate (218) and the positive electrode column (22) are connected by bolts and a positive electrode connecting plate (222). The negative electrode plate (219) and the negative electrode column (221) are connected by bolts and a negative electrode connecting plate (223).

7. The ventilation structure of a sodium battery PACK according to claim 1, characterized in that: A plurality of temperature sensors (301) are installed at positions close to the battery pack (203) inside the cavity. The plurality of temperature sensors (301) are evenly distributed among multiple groups of battery packs (203), and all the temperature sensors (301) are signal - connected to the BMS battery management system (300) for collecting battery temperature data in different regions and feeding it back to the BMS battery management system (300).

8. The ventilation structure of a sodium battery PACK according to claim 7, characterized in that: The temperature threshold range at least includes a low - temperature range, a normal - temperature range, a high - temperature range, and an ultra - high - temperature range; Among them, the test temperature of the low - temperature range is less than or equal to 30 °C; The test temperature of the normal - temperature range is greater than 30 °C and less than or equal to 45 °C; The test temperature of the high - temperature range is greater than 45 °C and less than or equal to 60 °C; The test temperature of the ultra - high - temperature range is greater than or equal to 60 °C.

9. A sodium battery PACK ventilation structure according to claim 8, characterized in that: An alarm indicator (302) electrically connected to the BMS battery management system (300) is installed on the outer wall of the left sealing plate (103). When the battery temperature is in the ultra-high temperature range and the duration exceeds 5 minutes, the BMS battery management system (300) controls the alarm indicator (302) to flash an alarm signal and controls the exhaust fan (105) to run at the highest speed.

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