Energy storage battery unit

Abstract

The utility model provides a kind of energy storage battery unit, belong to energy storage equipment technical field, including battery cabin, power distribution cabin and liquid cooling machine cabin;The inside of battery cabin is equipped with battery cluster;The inside of power distribution cabin is equipped with electrical module;The inside of liquid cooling machine cabin is equipped with liquid cooling unit;Liquid cooling pipeline is connected to liquid cooling unit, and liquid cooling pipeline is located battery cabin, for battery cluster heat dissipation;Liquid cooling pipeline has extension section, and extension section extends into power distribution cabin, for electrical module heat dissipation.The utility model adds extension section on liquid cooling pipeline, introduces it into power distribution cabin, and carries out heat dissipation for electrical module, and heat is brought to the liquid cooling unit of liquid cooling machine cabin by cooling liquid and is concentrated processing, there is no hot air discharge in power distribution cabin, eliminates local heat island effect, and will not cause thermal interference to other adjacent equipment.Meanwhile, since air conditioner is discarded, critical failure point is reduced, and the operation stability and reliability of entire energy storage battery unit are improved.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage equipment technology, and more specifically, it relates to an energy storage battery unit. Background Technology

[0002] Energy storage battery units are the core equipment for realizing the spatiotemporal migration and intelligent management of energy. Their core role is to effectively solve the problem of instantaneous and time-specific imbalance between power supply and demand through large-scale storage and precise release of electrical energy.

[0003] Energy storage battery units generally include a battery compartment, a power distribution compartment, and a liquid cooling compartment. The battery compartment houses battery clusters for energy storage, while the power distribution compartment contains electrical modules. The liquid cooling compartment houses a liquid cooling unit connected to liquid cooling pipes located within the battery compartment, which are used to dissipate heat from the battery clusters.

[0004] Due to the high IP protection level of the power distribution compartment, it is not possible to use ventilation holes for heat dissipation; air conditioning is the only option.

[0005] However, the hot air from air conditioners may exacerbate the heat island effect or affect other equipment; in addition, air conditioners require frequent maintenance, resulting in high maintenance costs and poor stability. Utility Model Content

[0006] The purpose of this invention is to provide an energy storage battery unit that aims to solve the problems of exacerbating the heat island effect and high maintenance costs caused by the use of air conditioning to dissipate heat from the power distribution compartment.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an energy storage battery unit, comprising: The battery compartment contains battery clusters. The power distribution compartment contains electrical modules; and The liquid-cooled compartment contains a liquid-cooled unit; the liquid-cooled unit is connected to a liquid-cooled pipeline located in the battery compartment for heat dissipation of the battery clusters; the liquid-cooled pipeline has an extension that extends into the power distribution compartment for heat dissipation of the electrical modules.

[0008] In one possible implementation, the liquid cooling pipeline includes an inlet pipe having the extended portion.

[0009] In some embodiments, the liquid cooling pipeline further includes a liquid outlet pipe, which also has the extended section.

[0010] In one possible implementation, the power distribution compartment and the liquid cooling compartment are located on the same side of the battery compartment, with the liquid cooling compartment located above the power distribution compartment.

[0011] In some embodiments, the extension segment includes: The vertical section, with its upper end passing through the power distribution compartment and connected to the liquid cooling unit; and The horizontal section has one end connected to the lower end of the vertical section, and the other end passes through the power distribution compartment and extends into the battery compartment.

[0012] In one possible implementation, the electrical module is located on the periphery of the extension section, and a fan assembly is provided inside the power distribution compartment and / or on the electrical module, the fan assembly being used to create a circulating flow of air within the power distribution compartment.

[0013] In some embodiments, the fan assembly is mounted on the electrical module and includes a first fan and a second fan; the second fan is located downstream of the first fan in the airflow circulation path.

[0014] In some embodiments, the air inlet side of the first fan faces the power distribution compartment, and the air outlet side faces the interior of the electrical module; the air inlet side of the second fan faces the interior of the electrical module, and the air outlet side faces the outer extension.

[0015] In some embodiments, a heat exchanger is provided in the power distribution compartment; the heat exchanger is located between the second fan and the extension section along the airflow circulation path.

[0016] In one possible implementation, the power distribution compartment is equipped with a dehumidifier.

[0017] The beneficial effects of the energy storage battery unit provided by this utility model are as follows: Compared with the prior art, the energy storage battery unit of this utility model utilizes the liquid cooling pipeline of the liquid cooling system, which was originally only used for heat dissipation of the battery clusters. By adding an extension section to the liquid cooling pipeline, it is introduced into the power distribution compartment to dissipate heat for the electrical modules. The heat is carried by the coolant to the liquid cooling unit in the liquid cooling compartment for centralized treatment. There is no hot air emission in the power distribution compartment, which fundamentally eliminates the local heat island effect and will not cause thermal interference to the compartment or other adjacent equipment.

[0018] In addition, the liquid cooling pipeline is a relatively closed static system with extremely low maintenance requirements. The power distribution compartment dissipates heat through the liquid cooling pipeline, requiring no additional maintenance, which significantly reduces maintenance workload and costs. At the same time, by eliminating air conditioning, it reduces critical failure points and improves the operational stability and reliability of the entire energy storage battery unit. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of the energy storage battery unit provided for an embodiment of this utility model (the side panel of the power distribution compartment is not shown in the figure). Figure 2 for Figure 1 Enlarged structural diagram of point A in the middle circle; Figure 3 This is a structural schematic diagram of the energy storage battery unit provided in an embodiment of the present utility model from another angle (the side panel of the power distribution compartment is not shown in the figure).

[0021] In the picture: 1. Battery compartment; 2. Power distribution compartment; 3. Liquid-cooled engine compartment; 4. Electrical modules; 5. Extension section; 51. Vertical section; 52. Horizontal section; 6. Fan assembly; 61. First fan; 62. Second fan; 7. Dehumidifier. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] Please refer to the following: Figure 1 and Figure 2 The energy storage battery unit provided by this utility model will now be described. The energy storage battery unit includes a battery compartment 1, a power distribution compartment 2, and a liquid cooling compartment 3; the battery compartment 1 houses battery clusters; the power distribution compartment 2 houses electrical modules 4; the liquid cooling compartment 3 houses a liquid cooling unit; the liquid cooling unit is connected to liquid cooling pipes located in the battery compartment 1 for heat dissipation of the battery clusters; the liquid cooling pipes have an extension section 5 that extends into the power distribution compartment 2 for heat dissipation of the electrical modules 4.

[0024] This energy storage battery unit resembles a shipping container, with its internal cavity divided into a battery compartment 1, a power distribution compartment 2, and a liquid-cooled compartment 3. Battery compartment 1 houses multiple battery clusters, which are the basic physical and core functional units in the energy storage battery unit, enabling energy storage and release. A battery cluster is formed by integrating a large number of individual cells together in series and parallel, creating a device capable of large-scale energy storage. The battery cluster is the physical entity that directly executes the instructions of the battery management system, performing specific charging and discharging operations. In large-scale energy storage systems, battery clusters are typically considered the smallest unit for energy management and control. The system can independently control the charging and discharging of individual battery clusters and monitor their status.

[0025] The liquid cooling unit and liquid cooling piping constitute a liquid cooling system, primarily used for heat dissipation from the battery clusters. The liquid cooling unit can employ a structure common in existing technologies, providing cooling power to drive the coolant (usually a mixture of water and ethylene glycol) to continuously circulate within the closed liquid cooling piping; and dissipating the heat carried back by the coolant from the battery clusters to the external environment through its own air-liquid heat exchanger and fan components, thereby cooling the coolant.

[0026] Liquid cooling piping achieves efficient heat dissipation by closely fitting the battery cluster. For example, the support tray or bracket beneath the battery cluster can be made into a hollow structure, filled with cooling channels. The entire battery cluster rests directly on the support tray or bracket, allowing for large-area heat exchange at the bottom. Of course, other layouts can also be used for liquid cooling piping to dissipate heat from the battery cluster. Using liquid cooling piping to dissipate heat from battery clusters is a conventional technology and will not be elaborated upon here.

[0027] Electrical module 4 is housed within power distribution compartment 2. Electrical module 4 can serve as the control module for the energy storage battery system, acting as its nerve center and power hub, undertaking tasks such as power conversion, distribution, control, and protection. Electrical module 4 can integrate various electronic components, such as converters / PCS, grid-connected switchgear, transformers, controllers, fuses, circuit breakers, and surge protectors; all of these electronic components can be integrated within power distribution compartment 2. Electrical module 4 can also be an uninterruptible power supply (UPS) to power the electrical equipment of the energy storage battery unit, such as liquid-cooled units, fire-fighting equipment, and lighting equipment. It should be noted that the installation of electrical module 4 within power distribution compartment 2 to achieve specific functions is existing technology and will not be elaborated upon here.

[0028] To ensure the long-term safe and stable operation of delicate electronic components in harsh environments, the power distribution compartment 2 is generally a closed cavity with high IP rating requirements. Since the electronic components generate heat during operation, heat dissipation is necessary for the power distribution compartment 2.

[0029] This embodiment utilizes liquid cooling pipes to dissipate heat from the power distribution compartment 2. Specifically, the liquid cooling pipes have an extension section 5 that extends into the power distribution compartment 2. The extension section 5 can be attached to the electrical module 4 to remove heat from the electrical module 4; alternatively, the extension section 5 can be placed inside the power distribution compartment 2, using a fan assembly 6 to circulate the air within the compartment, allowing cool air to enter the electrical module 4 and remove its heat. The heated air is cooled by the extension section 5 after passing through it.

[0030] The extension section 5 can be a specific segment of the liquid cooling pipeline or a branch section. Specifically, the extension section 5 can pass through the bulkhead through a sealed interface to maintain the original sealing integrity of the power distribution compartment 2. Since the temperature of the coolant is much lower than that of the battery cluster, even if a small portion of the coolant extends into the power distribution compartment 2 through the extension section 5, it will not affect the heat dissipation of the battery cluster.

[0031] Compared with the prior art, the energy storage battery unit provided by this utility model utilizes the liquid cooling pipeline of the liquid cooling system, which was originally only used for heat dissipation of the battery clusters. By adding an extension section 5 to the liquid cooling pipeline, it is introduced into the power distribution compartment 2 to dissipate heat for the electrical module 4. The heat is carried by the coolant to the liquid cooling unit in the liquid cooling compartment 3 for centralized treatment. There is no hot air emission in the power distribution compartment 2, which fundamentally eliminates the local heat island effect and will not cause thermal interference to the compartment or other adjacent equipment.

[0032] The liquid cooling pipeline is a relatively closed, static system with extremely low maintenance requirements. The power distribution compartment 2 utilizes the liquid cooling pipeline for heat dissipation, requiring no additional maintenance, which significantly reduces maintenance workload and costs. At the same time, by eliminating air conditioning, it reduces critical failure points and improves the operational stability and reliability of the entire energy storage battery unit.

[0033] In this embodiment, the thermal management of the battery cluster and electrical module 4 is uniformly handled by the liquid cooling unit. A central control system can intelligently adjust the flow and temperature of the coolant according to the different operating conditions of the battery and electrical equipment, thereby achieving precise temperature control and energy efficiency optimization.

[0034] In some embodiments, the liquid cooling pipeline includes an inlet pipe having the aforementioned extension 5.

[0035] The inlet pipe contains coolant that has just come out of the liquid cooling unit, has been cooled, and is at its lowest temperature. Introducing this cooling capacity first into the electrical distribution compartment 2 can provide the strongest cooling capacity and the greatest temperature difference driving force for the heat-generating electrical modules 4, ensuring the highest heat dissipation efficiency.

[0036] Preferably, the outer section 5 of the inlet pipe is closer to the liquid cooling unit, and the coolant flows in the order of first the electrical distribution compartment 2 and then the battery compartment 1. After absorbing heat from the electrical module 4, the coolant temperature will rise slightly, but this temperature is usually still cold enough for the heat dissipation requirements of the battery cluster. This achieves gradient, series cooling of two heat sources in one system, resulting in high system efficiency and a logically sound system.

[0037] In some embodiments, the liquid cooling pipeline further includes a liquid outlet pipe, which also has the aforementioned extended section 5. That is, the power distribution compartment 2 has two extended sections 5, such as... Figure 1 and Figure 3 As shown, one of the extended sections 5 is part of the inlet pipe, and the other extended section 5 is part of the outlet pipe.

[0038] Although the temperature of the outlet pipe is higher than that of the inlet pipe, the temperature of the outlet pipe does not exceed 22.5℃ (the temperature difference between the outlet and inlet pipes is 2-5℃), while the ambient temperature of the power distribution compartment 2 is generally 50-60℃. Therefore, there is still a significant temperature difference between the outlet pipe and the power distribution compartment 2. The outlet pipe can also actively extract a large amount of heat from the environment of the power distribution compartment 2. This makes the power distribution compartment 2 equivalent to having two independent liquid cooling heat dissipation surfaces, which multiplies its total heat dissipation capacity, far exceeding the design of a single inlet pipe extension section 5.

[0039] Preferably, the outer extension 5 of the liquid outlet pipe is also close to the liquid cooling unit. The heat dissipated by the outer extension 5 of the liquid outlet pipe to the power distribution compartment 2 will not increase the heat dissipation burden of the battery cluster.

[0040] In some embodiments, the positional relationship between the power distribution compartment 2 and the liquid cooling compartment 3 can be as follows: Figure 1 and Figure 3 The structure shown is described in the following document. Figure 1 and Figure 3 The power distribution compartment 2 and the liquid cooling compartment 3 are located on the same side of the battery compartment 1, and the liquid cooling compartment 3 is located above the power distribution compartment 2.

[0041] Battery compartment 1 occupies most of the space of the energy storage battery unit. Power distribution compartment 2 and liquid cooling compartment 3 are integrated on the same side of battery compartment 1, forming a compact functional module. This reduces the total footprint and pipeline intersections of the energy storage battery unit, making the structure of the entire energy storage battery unit more regular and facilitating its layout and installation in a limited space.

[0042] Since the liquid cooling compartment 3 is located above the power distribution compartment 2, it provides the shortest physical path for the extension section 5 of the liquid cooling pipeline to extend into the power distribution compartment 2. The liquid cooling pipeline does not need to travel a long distance around other compartments, but directly enters the power distribution compartment 2 from the upper liquid cooling compartment 3, resulting in a simple and reasonable structure.

[0043] The length of the liquid cooling piping (including inlet and outlet pipes) is minimized, meaning that the resistance to coolant flow within the piping is reduced. This also lowers the pumping power required by the liquid cooling unit, reducing system energy consumption. Furthermore, it reduces the amount of material used in the piping itself and installation complexity, lowering initial investment costs.

[0044] In addition, shorter piping means less loss of cooling / heat during coolant transport. The low-temperature coolant from the liquid chiller can reach the battery cluster and power distribution compartment 2 with a lower temperature rise, resulting in higher heat dissipation efficiency; at the same time, the heat brought back from battery compartment 1 and power distribution compartment 2 can also return to the liquid chiller for heat dissipation more quickly, forming a highly efficient cycle.

[0045] In addition, the liquid cooling unit itself generates heat and noise during operation. Placing it at the top allows its cooling fan to directly exhaust hot air upwards, completely avoiding heat pollution or interference from its hot air and noise to the battery compartment 1 on the side and the power distribution compartment 2 below.

[0046] Please see Figure 2 Based on the above embodiments, the extension section 5 includes a vertical section 51 and a horizontal section 52; the upper end of the vertical section 51 passes through the power distribution compartment 2 and is connected to the liquid cooling unit; one end of the horizontal section 52 is connected to the lower end of the vertical section 51, and the other end passes through the power distribution compartment 2 and extends into the battery compartment 1.

[0047] In this embodiment, the extension section 5 specifically adopts a structural design with a vertical section 51 and a horizontal section 52, achieving the shortest and most direct physical connection from the liquid cooler unit to the power distribution compartment 2 and the battery compartment 1. The coolant enters vertically downwards from the upper liquid cooler unit through the vertical section 51 into the power distribution compartment 2, and then directly into the battery compartment 1 through the horizontal section 52. This reduces pipe bends and overall length, lowers the load on the liquid cooler unit's cooling pump, and further saves energy. The coolant can reach the heat dissipation end at the fastest speed and with the least temperature rise, ensuring the strongest cooling capacity.

[0048] The upper end of the vertical part 51 extends into the liquid cooling compartment 3 and connects to the liquid cooling unit. Therefore, only a high standard of sealing treatment (such as using high-performance sealing rings or welding) is required at the partition between the liquid cooling compartment 3 and the power distribution compartment 2 to ensure that the overall IP protection level of the power distribution compartment 2 is not compromised.

[0049] In some embodiments, the heat dissipation of the electrical module 4 described above can be achieved by... Figure 2 The structure shown is described in the following document. Figure 2 The electrical module 4 is located on the periphery of the extension section 5. The power distribution compartment 2 and / or the electrical module 4 are provided with a fan assembly 6, which is used to make the airflow in the power distribution compartment 2 form a circulating flow.

[0050] In this embodiment, airflow circulation is used to dissipate heat from the electrical module 4. The outer extension section 5 acts as a cold source, and the fan assembly 6 drives air to circulate within the power distribution compartment 2, continuously blowing the cool air from the surface of the outer extension section 5 onto the electrical module 4. The cold air enters the electrical module 4, carrying away its heat. The heated air is then cooled by the outer extension section 5 after passing through it.

[0051] The electrical module 4 is cooled by airflow circulation. The extension section 5 only needs to be installed in the power distribution compartment 2, which simplifies the installation location requirements of the extension section 5 and also simplifies the structure of the extension section 5, thereby reducing the load on the cooling pump and saving energy.

[0052] Please see Figure 2 Based on the above implementation, the fan assembly 6 is mounted on the electrical module 4 and includes a first fan 61 and a second fan 62; in the airflow circulation path, the second fan 62 is located downstream of the first fan 61.

[0053] The first fan 61 is located on the air inlet side of the electrical module 4. Its function is to act as a powerful suction source, actively and quickly drawing cool air into the electrical module 4. This creates a negative pressure zone in the electrical module 4 area, ensuring that heat is not trapped. The second fan 62 is located downstream of the first fan 61, also on the air outlet side of the electrical module 4. It is used to extract the hot air that has passed through the electrical module 4 and discharge it to the power distribution compartment 2.

[0054] The combination of the first fan 61 and the second fan 62 together forms a stable forced circulation air duct, which enables the airflow in the power distribution compartment 2 to form a directional and efficient flow path, so as to ensure that the cold air can continuously pass through the electrical module 4 to dissipate heat.

[0055] Please see Figure 2 Based on the above implementation, the air inlet side of the first fan 61 faces the power distribution compartment 2 and the air outlet side faces the interior of the electrical module 4; the air inlet side of the second fan 62 faces the interior of the electrical module 4 and the air outlet side faces the outer extension 5.

[0056] The first fan 61 has its air inlet side facing the electrical distribution compartment 2 and its air outlet side facing the interior of the electrical module 4. This means that the first fan 61 no longer simply draws cold air away from the outside of the module, but actively forces the air in the electrical distribution compartment 2 into the internal cavities and gaps of the electrical module 4. It can force the cooling airflow to penetrate the core heat-generating area inside the electrical module 4 to improve the heat dissipation effect.

[0057] The second fan 62 has its air inlet side facing the inside of the electrical module 4 and its air outlet side facing the outer extension section 5. This means that the second fan 62 directly draws out the air heated by the electrical module 4 and precisely sprays it onto the outer extension section 5 of the liquid cooling pipeline. This ensures that all air heated by the electrical module 4 must flow to the outer extension section 5, realizing point-to-point direct heat transport from the heat source to the cold source and completely eliminating the possibility of hot air lingering elsewhere.

[0058] In some embodiments, the power distribution compartment 2 is also provided with a heat exchanger; the heat exchanger is located between the second fan 62 and the extension section 5 in the airflow circulation path.

[0059] The function of the heat exchanger is to preliminarily cool the hot airflow before it reaches the outer extension section 5, thereby intercepting a portion of the heat load. The heat exchanger is located at the point in the airflow path with the highest temperature, that is, when the hot air has just been discharged from the electrical module 4 by the second fan 62, but has not yet reached the outer extension section 5.

[0060] A heat exchanger is added inside the power distribution compartment 2, working in conjunction with the outer extension section 5, to achieve two-stage heat exchange for the hot air passing through the electrical module 4. The heat exchanger first performs preliminary cooling on the hottest exhaust gas, intercepting and dissipating most of the heat. The outer extension section 5 then performs secondary cooling on the already preliminarily cooled air, reducing the temperature to the target value. This cascaded utilization method improves the heat handling capacity and efficiency of the power distribution compartment 2, making it particularly suitable for scenarios with high power density and stringent heat dissipation requirements.

[0061] In some embodiments, the aforementioned power distribution compartment 2 is also equipped with a dehumidifier 7, such as... Figure 3 As shown.

[0062] Since the power distribution compartment 2 is a closed cavity, air cooling within the sealed space can lead to condensation. When humid air comes into contact with a surface whose temperature is lower than the air's dew point, the water vapor in the air will condense into liquid water. If condensation occurs in critical areas such as the liquid cooling pipes, the circuit boards of the electrical module 4, and the high-voltage terminals, it can cause problems such as electrical short circuits, shortened creepage distances, and metal corrosion.

[0063] The function of dehumidifier 7 is to actively and continuously remove water vapor from the closed-loop air in the power distribution compartment 2, keeping the dew point temperature of the air consistently below the surface temperature of the outer extension section 5, thereby eliminating the risk of condensation, achieving dry cooling, and ensuring electrical safety. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy storage battery unit, characterized in that, include: Battery compartment (1), which contains battery clusters; The power distribution compartment (2) is equipped with electrical modules (4); as well as The liquid-cooled compartment (3) is equipped with a liquid-cooled unit inside; the liquid-cooled unit is connected to a liquid-cooled pipeline, which is located in the battery compartment (1) and is used to dissipate heat for the battery cluster; the liquid-cooled pipeline has an extension section (5), which extends into the power distribution compartment (2) and is used to dissipate heat for the electrical module (4).

2. The energy storage battery unit as described in claim 1, characterized in that, The liquid cooling pipeline includes a liquid inlet pipe, which has the extended section (5).

3. The energy storage battery unit as described in claim 2, characterized in that, The liquid cooling pipeline also includes a liquid outlet pipe, which also has the extension section (5).

4. The energy storage battery unit as described in claim 1, characterized in that, The power distribution compartment (2) and the liquid cooling compartment (3) are located on the same side of the battery compartment (1), and the liquid cooling compartment (3) is located above the power distribution compartment (2).

5. The energy storage battery unit as described in claim 4, characterized in that, The extension segment (5) includes: The vertical section (51) extends through the power distribution compartment (2) at its upper end and connects to the liquid cooling unit; and The horizontal part (52) is connected at one end to the lower end of the vertical part (51), and the other end passes through the power distribution compartment (2) and extends into the battery compartment (1).

6. The energy storage battery unit as described in claim 1, characterized in that, The electrical module (4) is located on the periphery of the extension section (5). A fan assembly (6) is provided inside the power distribution compartment (2) and / or on the electrical module (4). The fan assembly (6) is used to make the airflow inside the power distribution compartment (2) form a circulating flow.

7. The energy storage battery unit as described in claim 6, characterized in that, The fan assembly (6) is mounted on the electrical module (4) and includes a first fan (61) and a second fan (62); in the path of airflow circulation, the second fan (62) is located downstream of the first fan (61).

8. The energy storage battery unit as described in claim 7, characterized in that, The first fan (61) has its air inlet side facing the power distribution compartment (2) and its air outlet side facing the interior of the electrical module (4); the second fan (62) has its air inlet side facing the interior of the electrical module (4) and its air outlet side facing the outer extension (5).

9. The energy storage battery unit as described in claim 8, characterized in that, The power distribution compartment (2) is equipped with a heat exchanger; the heat exchanger is located between the second fan (62) and the extension section (5) on the airflow circulation path.

10. The energy storage battery unit as described in claim 1, characterized in that, The power distribution compartment (2) is equipped with a dehumidifier (7).

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