An energy storage system

Abstract

The present application discloses an energy storage system, which belongs to the field of energy storage technology. The energy storage system includes a battery pack, a liquid cooling unit, and a dehumidification device. The liquid cooling unit is provided with a liquid cooling pipeline, and the liquid cooling pipeline is connected to the battery pack; the dehumidification device includes a dehumidification module, and the dehumidification module is provided with a cooling pipe and a dehumidification air duct. The cooling pipe is connected to the liquid cooling unit through the liquid cooling pipeline. The cooling pipe is configured to cool and dehumidify the airflow flowing through the dehumidification air duct, and the dehumidification device is configured to direct the airflow flowing through the dehumidification air duct to the battery pack; the present application is connected to the hot air flow through the dehumidification air duct, and the coolant in the cooling pipe cools the hot air flow flowing through the dehumidification air duct, and the hot air flow contacts the cooling pipe, and condensation water is formed on the surface of the cooling pipe to achieve dehumidification. In addition, the liquid cooling unit and the dehumidification device can work separately or simultaneously to achieve liquid cooling of the battery pack and dehumidification and cooling of the environment in the battery compartment.

Description

Technical Field

[0001] The present application belongs to the field of energy storage technology, and specifically relates to an energy storage system. Background Art

[0002] With the rapid development of the energy storage industry, the safety performance requirements for battery systems are becoming increasingly higher. In existing liquid-cooled industrial and commercial energy storage systems, the battery compartment often faces the problem of condensation inside the compartment. To solve the condensation problem, semiconductor dehumidifiers or compression refrigeration dehumidifiers are generally added, but there are disadvantages such as poor dehumidification effect and temperature rise in the battery compartment. Summary of the invention

[0003] Purpose of the invention: The embodiment of the present application provides an energy storage system, which aims to overcome the current technical problems of poor dehumidification effect in the battery compartment and temperature rise in the battery compartment.

[0004] Technical solution: An energy storage system disclosed in an embodiment of the present application includes:

[0005] Battery pack;

[0006] A liquid cooling unit, provided with a liquid cooling pipeline, wherein the liquid cooling pipeline is connected to the battery pack;

[0007] The dehumidification device includes a dehumidification module, the dehumidification module is provided with a cooling pipe and a dehumidification air duct, the cooling pipe is connected to the liquid cooling unit through the liquid cooling pipeline, the cooling pipe is configured to cool and dehumidify the airflow flowing through the dehumidification air duct, and the dehumidification device is configured to direct the airflow flowing through the dehumidification air duct to the battery pack.

[0008] In some embodiments, the dehumidification device also includes an exhaust duct, which is connected to the dehumidification module and connected to the air outlet of the dehumidification duct; the exhaust duct has an exhaust port, and the exhaust port is used to direct the airflow to at least one side of the battery pack in its thickness direction.

[0009] In some embodiments, the exhaust duct includes:

[0010] A first shunt pipe is arranged along the thickness direction of the battery pack, and the exhaust port is opened on the first shunt pipe;

[0011] The second shunt pipe has one end connected to the first shunt pipe, the other end connected to the dehumidification module, and communicated with the air outlet of the dehumidification air duct.

[0012] In some embodiments, the second shunt tube is extended along the length direction of the battery pack, or the second shunt tube is arranged along the width direction of the battery pack.

[0013] In some embodiments, the dehumidification device includes an air duct, which is connected to the dehumidification module, and the air outlet of the air duct is connected to the air inlet of the dehumidification air duct, and the air inlet of the air duct is arranged close to the side of the battery pack away from the exhaust port.

[0014] In some embodiments, the air duct is extended along the length direction of the battery pack, or the air duct is arranged along the width direction of the battery pack.

[0015] In some embodiments, the liquid cooling circuit includes:

[0016] a first water inlet pipe, one end of which is connected to the water outlet of the liquid cooling unit, and the other end of which is connected to the water inlet of the battery pack;

[0017] a first water outlet pipe, one end of which is connected to the water inlet of the liquid cooling unit, and the other end of which is connected to the water outlet of the battery pack;

[0018] A second water inlet pipe, one end of which is connected to the water outlet of the liquid cooling unit, and the other end of the second water inlet pipe is connected to one end of the cooling pipe;

[0019] A second water outlet pipe has one end connected to the water inlet of the liquid cooling unit, and the other end of the second water outlet pipe is connected to the other end of the cooling pipeline.

[0020] In some embodiments, the energy storage system further comprises:

[0021] a first solenoid valve, disposed on the first water inlet pipe, the first solenoid valve being configured to control the communication between the liquid cooling unit and the battery pack;

[0022] A second solenoid valve is disposed on the second water inlet pipe, and the second solenoid valve is configured to control the communication between the liquid cooling unit and the cooling pipeline.

[0023] In some embodiments, when the first solenoid valve is opened and the second solenoid valve is closed, the battery pack is cooled by a liquid cooling plate therein, and the dehumidification device is closed;

[0024] When the first solenoid valve is closed and the second solenoid valve is opened, the battery pack is air-cooled by the dehumidification device, and the liquid cooling plate in the battery pack is closed;

[0025] When both the first solenoid valve and the second solenoid valve are opened, the battery pack is cooled by liquid through the liquid cooling plate therein and is cooled by air through the dehumidification device.

[0026] In some embodiments, the dehumidification device further comprises:

[0027] A condensation module is arranged on the cooling pipe, and the condensation module is located in the dehumidification air duct;

[0028] A fan connected to the dehumidification module and arranged on the dehumidification air duct;

[0029] The water receiving box is connected to the dehumidification module and is arranged below the condensation module for receiving condensed water generated by the condensation module.

[0030] In some embodiments, the battery pack has a plurality of battery packs, and the plurality of battery packs are arranged in sequence at intervals;

[0031] There are a plurality of the exhaust ports, and the plurality of the exhaust ports are arranged along the thickness direction of the battery pack, so as to direct the airflow to at least one side of the battery pack in the thickness direction thereof;

[0032] The size of at least one of the air outlets is different from the sizes of the other air outlets.

[0033] An energy storage system according to an embodiment of the present application comprises a battery pack, a liquid cooling unit and a dehumidification device, wherein the liquid cooling unit is provided with a liquid cooling pipeline connected to the battery pack; the dehumidification device comprises a dehumidification module, the dehumidification module is provided with a cooling pipe and a dehumidification air duct, the cooling pipe is connected to the liquid cooling pipe and is connected in parallel with the battery pack, the cooling pipe is configured to cool and dehumidify the air flow passing through the dehumidification air duct, and the dehumidification device is configured to direct the air flow passing through the dehumidification air duct to the battery pack; the present application is connected to the hot air flow in the battery compartment through the dehumidification air duct, the coolant in the liquid cooling unit cools the hot air flow passing through the dehumidification air duct through the cooling pipe to achieve cooling, and the hot air flow contacts the cooling pipe to form condensed water on the surface of the cooling pipe to achieve dehumidification, that is, after dehumidification and cooling by the dehumidification device, the cooled and dehumidified air flow is then introduced into the battery compartment to cool and dehumidify the environment in the battery compartment. In addition, the liquid cooling unit and the dehumidification device can work separately or simultaneously to realize liquid cooling of the battery pack and dehumidification and cooling of the environment inside the battery compartment. Such a design can improve the safety performance of the energy storage system and ensure that the battery pack operates under appropriate temperature and humidity conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1A simplified schematic diagram of the overall structure of the energy storage system in the embodiment of the present application;

[0036] Figure 2 A schematic diagram of the location setting of an exhaust duct in an embodiment of the present application;

[0037] Figure 3 A schematic diagram of another arrangement of the exhaust duct in an embodiment of the present application;

[0038] Figure 4 A schematic diagram of the location setting of an air duct in an embodiment of the present application;

[0039] Figure 5 A schematic diagram of another arrangement of the positions of the air guide duct in an embodiment of the present application;

[0040] Reference numerals:

[0041] 10-battery pack; 11-first water inlet; 12-first water outlet;

[0042] 20-liquid cooling unit; 21-liquid cooling pipeline; 211-main water inlet pipeline; 212-main water outlet pipeline; 213-first water inlet pipe; 214-first water outlet pipe; 215-second water inlet pipe; 216-second water outlet pipe;

[0043] 30-dehumidification device; 31-dehumidification module; 311-cooling pipe; 312-dehumidification air duct; 32-exhaust air duct; 321-exhaust port; 322-first shunt pipe; 323-second shunt pipe; 33-condensation module; 34-fan; 35-water receiving box;

[0044] 40-first solenoid valve;

[0045] 50 - second solenoid valve;

[0046] 60-Air duct. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically limited. The terms "first", "second", "third", etc. are only used to name the parts or embodiments with numbers for the convenience of description, and do not imply that there is an order of importance between the parts or embodiments.

[0049] In the drawings of the embodiments of the present application, the arrow marked with X represents the first direction X, the arrow marked with Y represents the second direction Y, and the arrow marked with Z represents the third direction Z. The description of the present application introduces the first direction X, the second direction Y and the third direction Z in order to more clearly describe the structure and relative position relationship of each component in the energy storage system. In practical applications, the first direction X, the second direction Y and the third direction Z can point to any direction in space. The first direction X is the length direction of the battery pack, the second direction Y is the width direction of the battery pack, and the third direction Z is the thickness direction of the battery pack, which is also the stacking direction of each battery pack. Optionally, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0050] As the preface to the embodiments of the present application, with the rapid development of the energy storage industry, the safety performance requirements for battery systems are becoming increasingly higher. In existing liquid-cooled industrial and commercial energy storage systems, the battery compartment often faces the problem of condensation inside the compartment. To solve the condensation problem, a semiconductor dehumidifier or a compression refrigeration dehumidifier is generally added, but there are disadvantages of poor dehumidification effect and temperature rise inside the battery compartment.

[0051] Poor dehumidification: Although a dehumidifier can help reduce humidity in the battery compartment, sometimes the dehumidification effect may not be ideal. Especially in high humidity environments or when humidity is severe, the dehumidifier may not be able to completely eliminate moisture, causing condensation problems to persist.

[0052] Temperature increase: Semiconductor dehumidifiers or compression refrigeration dehumidifiers require additional energy to operate, which may cause the temperature in the battery compartment to rise. High temperature environment has an adverse effect on the performance and life of the battery, which may accelerate the aging process of the battery and reduce the capacity and cycle life.

[0053] Increased cost: Adding a dehumidifier will increase the cost of the system. Dehumidifiers are more expensive and require additional energy consumption to operate, which may have a certain impact on the economic feasibility of the energy storage system.

[0054] In view of this, an embodiment of the present application provides an energy storage system, aiming to solve at least one of the above-mentioned technical problems.

[0055] In some embodiments, see Figure 1 , Figure 1 It is a simplified schematic diagram of the overall structure of the energy storage system in the embodiment of the present application. The energy storage system includes a battery pack 10, a liquid cooling unit 20, and a dehumidification device 30, wherein the liquid cooling unit 20 is provided with a liquid cooling pipeline 21, and the liquid cooling pipeline 21 is connected to the battery pack 10; the dehumidification device 30 includes a dehumidification module 31, and the dehumidification module 31 is provided with a cooling pipe 311 and a dehumidification air duct 312, and the cooling pipe 311 is connected to the liquid cooling unit 20 through the liquid cooling pipeline 21, and the cooling pipe 311 is configured to cool and dehumidify the airflow flowing through the dehumidification air duct 312, and the dehumidification device 30 is configured to direct the airflow flowing through the dehumidification air duct 312 to the battery pack 10. Among them, the battery pack 10 is arranged in a battery compartment, and the battery compartment has a plurality of battery packs 10 arranged in sequence. This embodiment is to dehumidify and cool the environment in the battery compartment to prevent moisture and high temperature from affecting the battery performance.

[0056] It should be noted that the liquid cooling unit 20 is a device, which is usually composed of a coolant circulation system and a cooling device. The liquid cooling unit 20 absorbs the heat generated by the battery pack 10 through the circulation of the coolant and takes it away. The liquid cooling unit 20 is connected to the battery pack 10 through the liquid cooling pipeline 21, and the coolant is transferred to the battery pack 10 to cool the battery pack 10. The liquid cooling pipeline 21 is a pipeline system connecting the liquid cooling unit 20 and the battery pack 10. The liquid cooling pipeline 21 is responsible for transporting the coolant from the liquid cooling unit 20 to the battery pack 10, and bringing the hot coolant back to the liquid cooling unit 20 for recycling. The liquid cooling pipeline 21 is usually made of high temperature resistant and corrosion resistant materials to ensure the safe transmission and effective cooling of the coolant.

[0057] It should be noted that the function of the dehumidification device 30 is to reduce the humidity and temperature of the environment near the battery pack 10 to prevent moisture and high temperature from affecting the battery performance. The dehumidification device 30 includes a dehumidification module 31, and the dehumidification module 31 includes a cooling pipe 311 and a dehumidification air duct 312. The cooling pipe 311 is configured to cool and dehumidify the airflow flowing through the dehumidification air duct 312. Through the cooling and dehumidification process, the coolant passes through the cooling pipe 311 to cool the hot air flow flowing through the dehumidification air duct 312. At the same time, the hot air flow contacts the cooling pipe 311, and condensed water is formed on the surface of the cooling pipe 311. In this way, the humidity in the airflow can be reduced to achieve the dehumidification effect. The dehumidification device 30 directs the airflow cooled and dehumidified through the dehumidification air duct 312 to the battery pack 10 to achieve cooling and dehumidification of the environment near the battery pack 10.

[0058] It can be understood that the cooling pipe 311 is connected to the liquid cooling unit 20 through the liquid cooling pipeline 21, that is, the cooling pipe 311 is connected to the liquid cooling pipeline 21, and the cooling pipe 311 and the battery pack 10 are connected in parallel, which means that the liquid cooling of the battery pack 10 and the cooling and dehumidification of the environment in the battery compartment are two relatively independent systems. That is, the battery pack 10 can be liquid-cooled alone, and the environment in the battery compartment can be dehumidified and cooled alone, or the battery pack 10 can be liquid-cooled and the environment in the battery compartment can be dehumidified and cooled at the same time.

[0059] It should be noted that the battery pack 10 has a first water inlet 11 and a first water outlet 12. The first water inlet 11 is connected to the water outlet of the liquid cooling unit 20 through a liquid cooling pipeline 21, and the first water outlet 12 is connected to the water inlet of the liquid cooling unit 20 through a liquid cooling pipeline 21. The first water inlet 11 and the first water outlet 12 are located on the same side of the battery pack 10, and the first water inlet 11 and the first water outlet 12 are arranged along the first direction X.

[0060] In view of this, the liquid cooling unit 20 in the energy storage system of this embodiment is connected to the battery pack 10 through the liquid cooling pipeline 21, and is used to cool the battery pack 10. The cold source of the cooling pipeline 311 is supplied by the liquid cooling unit 20 through the liquid cooling pipeline 21, and is connected to the hot air flow in the battery compartment (not shown in the figure) through the dehumidification air duct 312. The coolant cools the hot air flow flowing through the dehumidification air duct 312 through the cooling pipeline 311 to achieve cooling. At the same time, the hot air flow contacts the cooling pipeline 311, and condensed water is formed on the surface of the cooling pipeline 311 to achieve dehumidification, that is, after dehumidification and cooling by the dehumidification device 30, the cooled and dehumidified air flow is passed into the battery compartment again to cool and dehumidify the environment in the battery compartment. In addition, the liquid cooling unit 20 and the dehumidification device 30 can work separately or simultaneously to achieve liquid cooling of the battery pack 10 and dehumidification and cooling of the environment in the battery compartment. Such a design can improve the safety performance of the energy storage system and ensure that the battery pack 10 operates under suitable temperature and humidity conditions.

[0061] In some embodiments, see Figures 2 to 5 , Figure 2 This is a schematic diagram of the location of an exhaust duct in an embodiment of the present application. Figure 3 This is a schematic diagram of another arrangement of the exhaust duct in the embodiment of the present application. Figure 4 This is a schematic diagram of the location of the air duct in an embodiment of the present application. Figure 5 The figure is a schematic diagram of the position setting of the air duct in the embodiment of the present application. The dehumidification device 30 also includes an exhaust duct 32, which is connected to the dehumidification module 31 and connected to the air outlet of the dehumidification duct 312. The exhaust duct 32 has an exhaust port 321, which is used to direct the airflow to at least one side of the battery pack 10 in the thickness direction thereof.

[0062] It should be noted that the function of the exhaust duct 32 is to guide the airflow processed by the dehumidification module 31 from the air outlet of the dehumidification duct 312 to a position close to the battery pack 10. Through the exhaust port 321, the dehumidification device 30 can send the dehumidified and cooled airflow to at least one side of the battery pack 10 in the thickness direction of the battery pack 10, so as to achieve the cooling of the battery pack 10 and the reduction of the humidity of the environment near the battery pack 10. Such a design can ensure that the effect of the dehumidification device 30 directly acts on the surface of the battery pack 10, especially in the thickness direction of the battery pack 10. By guiding the dehumidified airflow to a position close to the battery pack 10, the humidity and temperature of the environment near the battery pack 10 can be better controlled, thereby improving the performance and safety of the battery system and the temperature uniformity of the battery pack environment system.

[0063] In some embodiments, see Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the location of an exhaust duct in an embodiment of the present application. Figure 3 The figure is a schematic diagram of another arrangement of the exhaust duct in the embodiment of the present application. The dehumidification module 31 is arranged close to the side of the battery pack 10 away from the exhaust port 321. The exhaust duct 32 includes a first shunt pipe 322 and a second shunt pipe 323. The first shunt pipe 322 is arranged along the thickness direction of the battery pack 10, and the exhaust port 321 is opened on the first shunt pipe 322; one end of the second shunt pipe 323 is connected to the first shunt pipe 322, and the other end is connected to the dehumidification module 31, and is connected to the air outlet of the dehumidification duct 312.

[0064] It should be noted that in this embodiment, the moisture near the battery pack 10 is taken away by circulating airflow, and then passed to the vicinity of the battery pack 10 after cooling and dehumidification. In this embodiment, the dehumidification module 31 is arranged close to the side of the battery pack 10 away from the exhaust port 321, which means that the air inlet of the dehumidification module 31 needs to be as far away from the exhaust port 321 as possible, that is, the airflow discharged from the exhaust port 321 needs to flow as long as possible before entering the dehumidification device 30 from the air inlet of the dehumidification module 31 for cooling and dehumidification, so as to better cool and dehumidify the environment near the battery pack 10. The purpose of this design is to allow the airflow to flow a longer path in the exhaust duct 32, increase the cooling effect, and allow moisture to be better removed during the exhaust process.

[0065] It can be understood that the exhaust duct 32 includes a first shunt pipe 322 and a second shunt pipe 323. The first shunt pipe 322 is arranged along the thickness direction of the battery pack 10, that is, the first shunt pipe 322 is arranged along the third direction Z, which plays the role of diverting and guiding the airflow. The first shunt pipe 322 is located near the battery pack 10 and extends along the thickness direction (third direction Z) of the battery pack 10. An exhaust port 321 is provided on the first shunt pipe 322 for discharging the airflow after cooling and dehumidification. The second shunt pipe 323 is connected to the first shunt pipe 322, and plays the role of connecting and extending the airflow. One end of the second shunt pipe 323 is connected to the first shunt pipe 322, and the other end is connected to the dehumidification module 31, and is connected to the air outlet of the dehumidification duct 312. The design of the second shunt pipe 323 allows the airflow to enter from the dehumidification module 31, and then flow to the first shunt pipe 322 through the second shunt pipe 323. Through such an exhaust air duct 32 structure, the airflow enters the second diverter pipe 323 from the dehumidification module 31, then flows to the first diverter pipe 322, and finally is discharged through the exhaust port 321 of the first diverter pipe 322. This structure can effectively guide the airflow, so that the airflow from the dehumidification module 31 can pass through a longer path, thereby increasing the cooling effect.

[0066] In some embodiments, the dehumidification module 31 is arranged close to the side of the battery pack 10 away from the exhaust port 321, so that the airflow discharged from the exhaust port 321 flows as far as possible and then enters the dehumidification device 30 from the air inlet of the dehumidification module 31 for cooling and dehumidification. The exhaust air duct 32 is arranged at the following two locations:

[0067] like Figure 2 As shown, in this solution, the second shunt pipe 323 is extended along the length direction of the battery pack 10, that is, the second shunt pipe 323 is extended along the first direction X. As can be seen from the figure, the hot air flow in the battery compartment enters from the air inlet of the dehumidification module 31, and after cooling and dehumidification by the dehumidification module 31, it flows to the second shunt pipe 323 and the first shunt pipe 322 in sequence, and then is discharged from the exhaust port 321. The discharged airflow flows along the length direction of the battery pack 10 (the first direction X), flows through at least one side of the battery pack 10 in its thickness direction (the third direction Z), and then enters the dehumidification device 30 from the air inlet of the dehumidification module 31 again, forming a cycle.

[0068] like Figure 3As shown, in this solution, the second shunt pipe 323 is extended along the width direction of the battery pack 10, that is, the second shunt pipe 323 is extended along the second direction Y. As can be seen from the figure, the hot air flow in the battery compartment enters from the air inlet of the dehumidification module 31, and after being cooled and dehumidified by the dehumidification module 31, it flows to the second shunt pipe 323 and the first shunt pipe 322 in sequence, and then is discharged from the exhaust port 321. The discharged airflow flows along the width direction (second direction Y) of the battery pack 10, flows through at least one side of the battery pack 10 in its thickness direction (third direction Z), and then enters the dehumidification device 30 from the air inlet of the dehumidification module 31 again, forming a cycle.

[0069] In view of this, both solutions in this embodiment can realize the circulation of airflow, so that the exhausted airflow can pass through a longer path, thereby increasing the cooling effect. The specific solution to be selected should be determined according to the actual situation and design requirements.

[0070] In some embodiments, see Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the location of the air duct in an embodiment of the present application. Figure 5 This is a schematic diagram of another arrangement of the position of the air duct in the embodiment of the present application. The dehumidification module 31 is arranged close to the battery pack 10 on the side facing the exhaust port 321. In order to prevent the airflow discharged from the exhaust port 321 from short-circuiting, the airflow needs to flow as long as possible before entering the dehumidification device 30 from the air inlet of the dehumidification module 31 for cooling and dehumidification. In this embodiment, the dehumidification device 30 includes an air duct 60, which is connected to the dehumidification module 31, and the air outlet of the air duct 60 is connected to the air inlet of the dehumidification air duct 312, and the air inlet of the air duct 60 is arranged close to the battery pack 10 on the side away from the exhaust port 321.

[0071] It should be noted that in this embodiment, the moisture near the battery pack 10 is taken away by circulating airflow, and then passed to the vicinity of the battery pack 10 after cooling and dehumidification. In this embodiment, the dehumidification module 31 is arranged close to the battery pack 10 on the side facing the exhaust port 321, which means that the air inlet of the dehumidification module 31 is close to the exhaust port 321. There is a situation where the airflow enters the air inlet of the dehumidification module 31 for dehumidification and cooling again just after the exhaust port 321 discharges the airflow. At this time, the dehumidification and cooling effect is general. Therefore, in this embodiment, the air duct 60 is arranged to extend the distance between the air inlet (airflow inlet) of the air duct 60 and the exhaust port 321, so as to better cool and dehumidify the environment near the battery pack 10. The purpose of this design is to allow the airflow to flow a longer path in the exhaust duct 32, increase the cooling effect, and allow moisture to be better taken away during the exhaust process.

[0072] It can be understood that the exhaust duct 32 is arranged near the battery pack 10 along the thickness direction of the battery pack 10 (the third direction Z), and plays the role of diverting and guiding the airflow. An exhaust port 321 is opened on the exhaust duct 32 to discharge the airflow after cooling and dehumidification. The guide pipe is connected to the dehumidification module 31, and the air outlet of the air duct 60 is connected to the air inlet of the dehumidification duct 312, which plays the role of connecting and extending the airflow. The air duct 60 extends the airflow in the battery compartment to the dehumidification device 30 for cooling and dehumidification. The air duct 60 extends the path of the airflow discharged from the exhaust port 321 and increases the cooling and dehumidification effect. Through this design, the airflow enters from the air inlet of the air duct 60, passes through the dehumidification module 31 for cooling and dehumidification, and then flows to the exhaust duct 32, and finally is discharged through the exhaust port 321 of the exhaust duct 32. This structure can effectively guide the airflow, so that the airflow coming out of the dehumidification module 31 can pass through a longer path, increasing the cooling effect.

[0073] In some embodiments, the dehumidification module 31 is arranged close to the side of the battery pack 10 away from the exhaust port 321, so that the airflow discharged from the exhaust port 321 flows as far as possible and then enters the dehumidification device 30 from the air inlet of the dehumidification module 31 for cooling and dehumidification. The exhaust air duct 32 is arranged at the following two locations:

[0074] like Figure 4 As shown, in this solution, the air duct 60 is extended along the length direction of the battery pack 10, that is, the air duct 60 is extended along the first direction X. As can be seen from the figure, the hot air flow in the battery compartment enters from the air inlet of the air duct 60, flows to the exhaust duct 32 after being cooled and dehumidified by the dehumidification module 31, and then is discharged from the exhaust port 321. The exhausted airflow flows along the length direction of the battery pack 10, flows through at least one side of the battery pack 10 in its thickness direction, and then enters the dehumidification device 30 again from the air inlet of the air duct 60 to form a cycle.

[0075] like Figure 5 As shown, in this solution, the air duct 60 is extended along the width direction of the battery pack 10, that is, the air duct 60 is extended along the second direction Y. As can be seen from the figure, the hot air flow in the battery compartment enters from the air inlet of the air duct 60, flows to the exhaust duct 32 after being cooled and dehumidified by the dehumidification module 31, and then is discharged from the exhaust port 321. The exhausted airflow flows along the width direction of the battery pack 10, flows through at least one side of the battery pack 10 in its thickness direction, and then enters the dehumidification device 30 again from the air inlet of the air duct 60 to form a cycle.

[0076] In view of this, both solutions in this embodiment can realize the circulation of airflow, so that the exhausted airflow can pass through a longer path, thereby increasing the cooling effect. The specific solution to be selected should be determined according to the actual situation and design requirements.

[0077] In some embodiments, the liquid cooling circuit 21 includes a first water inlet pipe 213, a first water outlet pipe 214, a second water inlet pipe 215, and a second water outlet pipe 216, wherein one end of the first water inlet pipe 213 is connected to the water outlet of the liquid cooling unit 20, and the other end of the first water inlet pipe 213 is connected to the water inlet (first water inlet 11) of the battery pack 10; one end of the first water outlet pipe 214 is connected to the water inlet of the liquid cooling unit 20, and the other end of the first water outlet pipe 214 is connected to the water outlet (first water outlet 12) of the battery pack 10; one end of the second water inlet pipe 215 is connected to the water outlet of the liquid cooling unit 20, and the other end of the second water inlet pipe 215 is connected to one end of the cooling pipe 311; one end of the second water outlet pipe 216 is connected to the water inlet of the liquid cooling unit 20, and the other end of the second water outlet pipe 216 is connected to the other end of the cooling pipe 311.

[0078] It should be noted that the liquid cooling circuit 21 may also include a main water inlet pipe 211 and a main water outlet pipe 212, wherein the main water inlet pipe 211 is connected to the water outlet of the liquid cooling unit 20; and the main water outlet pipe 212 is connected to the water inlet of the liquid cooling unit 20. That is, one end of the first water inlet pipe 213 is connected to the main water inlet pipe 211, and the other end of the first water inlet pipe 213 is connected to the water inlet (first water inlet 11) of the battery pack 10; one end of the first water outlet pipe 214 is connected to the main water outlet pipe 212, and the other end of the first water outlet pipe 214 is connected to the water outlet (first water outlet 12) of the battery pack 10; one end of the second water inlet pipe 215 is connected to the main water inlet pipe 211, and the other end of the second water inlet pipe 215 is connected to one end of the cooling pipe 311; one end of the second water outlet pipe 216 is connected to the main water outlet pipe 212, and the other end of the second water outlet pipe 216 is connected to the other end of the cooling pipe 311.

[0079] It can be understood that the main water inlet pipe 211 passes the coolant to the first water inlet pipe 213 and the second water inlet pipe 215, that is, the main water inlet pipe passes the cold source to the battery pack 10 and the dehumidification device 30 respectively. The main water outlet pipe receives the coolant in the liquid cooling unit 20, and passes it to the battery pack 10, the dehumidification device 30, and then to the liquid cooling unit 20 to form a cycle. One end of the first water inlet pipe 213 is connected to the main water inlet pipe 211, and the other end is connected to the water inlet (first water inlet 11) of the battery pack 10, so as to introduce the coolant into the battery pack 10. One end of the first water outlet pipe 214 is connected to the main water outlet pipe 212, and the other end is connected to the water outlet (first water outlet 12) of the battery pack 10, so as to discharge the coolant from the battery pack 10. One end of the second water inlet pipe 215 is connected to the main water inlet pipe 211, and the other end is connected to one end of the cooling pipe 311, so as to introduce the coolant into the cooling pipe 311. One end of the second water outlet pipe 216 is connected to the main water outlet pipe 212, and the other end is connected to the other end of the cooling pipe 311, so that the coolant is discharged from the cooling pipe 311. The coolant passes through the dehumidification device 30 in the process of passing through the cooling pipe 311. Such a design of the liquid cooling pipeline 21 can realize the circulation of the coolant, introduce the coolant from the liquid cooling unit 20 into the liquid cooling system, and then enter the battery pack 10 through the first water inlet pipe 213 for cooling, and then discharge from the battery pack 10 through the first water outlet pipe 214. At the same time, the coolant can also enter the cooling pipe 311 through the second water inlet pipe 215, cool and dehumidify the environment in the battery compartment through the dehumidification device 30, and finally be discharged through the second water outlet pipe 216. Such a design of the liquid cooling pipeline 21 can effectively reduce the temperature of the battery pack 10 and the environment in the battery compartment, provide a cooling effect, and ensure the normal operation and safety of the system. The design of the liquid cooling system and the pipe connection method can be adjusted and optimized according to specific application requirements and system design.

[0080] In some embodiments, the dehumidification system also includes a first solenoid valve 40 and a second solenoid valve 50. The first solenoid valve 40 is disposed on the first water inlet pipe 213, and the first solenoid valve 40 is configured to control the connection between the liquid cooling unit 20 and the battery pack 10; the second solenoid valve 50 is disposed on the second water inlet pipe 215, and the second solenoid valve 50 is configured to control the connection between the liquid cooling unit 20 and the cooling pipe 311.

[0081] It should be noted that the first solenoid valve 40 is arranged on the first water inlet pipe 213 to control the communication between the liquid cooling unit 20 and the battery pack 10. The function of the first solenoid valve 40 is to control whether the coolant flows to the battery pack 10 according to system requirements. When the first solenoid valve 40 is opened, the coolant can flow to the battery pack 10 for cooling; when the first solenoid valve 40 is closed, the coolant will be prevented from flowing to the battery pack 10. The second solenoid valve 50 is arranged on the second water inlet pipe 215 to control the communication between the liquid cooling unit 20 and the cooling pipe 311. The function of the second solenoid valve 50 is to control whether the coolant flows to the cooling pipe 311 according to system requirements. When the second solenoid valve 50 is opened, the coolant can flow to the cooling pipe 311 to cool and dehumidify the environment in the battery compartment; when the second solenoid valve 50 is closed, the coolant will be prevented from flowing to the cooling pipe 311. Through the control of the first solenoid valve 40 and the second solenoid valve 50, the communication and isolation between the liquid cooling unit 20 and the battery pack 10 and the cooling pipe 311 can be achieved. Such a design can flexibly control the flow path of the coolant according to system requirements and working conditions to achieve cooling and dehumidification of the battery pack 10 and other components.

[0082] Specifically, by controlling the switches of the first solenoid valve 40 and the second solenoid valve 50, the energy storage system has three cooling modes: pure liquid cooling mode, pure air cooling mode, and air-liquid composite mode. In the normal mode, the first solenoid valve 40 is open and the second solenoid valve 50 is closed, and the battery pack 10 is cooled in a pure liquid cooling mode. The battery pack 10 only performs liquid cooling and heat dissipation through the liquid cooling plate therein; when the ambient humidity in the battery compartment rises to the working threshold of the dehumidification module 31, the first solenoid valve 40 and the second solenoid valve 50 are both opened, and the battery pack 10 is cooled in an air-liquid composite mode. The battery pack 10 performs liquid cooling and heat dissipation through the liquid cooling plate therein, and performs air cooling and heat dissipation through the dehumidification device 30. The air cooling and heat dissipation reduces and evenly adjusts the ambient temperature of the battery compartment while dehumidifying the battery compartment. When the ambient humidity in the battery compartment is lower than the working threshold of the dehumidification module 31, the first solenoid valve 40 and the second solenoid valve 50 are both opened, and the battery pack 10 is cooled in an air-liquid composite mode. The battery pack 10 performs liquid cooling and heat dissipation through the liquid cooling plate therein, and performs air cooling and heat dissipation through the dehumidification device 30. The air cooling and heat dissipation reduces and evenly adjusts the ambient temperature of the battery compartment while dehumidifying the battery compartment. When the temperature drops to the set threshold, the first solenoid valve 40 opens and the second solenoid valve 50 closes, and the liquid cooling mode of the battery pack 10 is restored to the pure liquid cooling mode; when the ambient temperature of the battery compartment is close to supporting the natural heat dissipation of the battery pack 10, the first solenoid valve 40 closes and the second solenoid valve 50 opens, and the cooling mode of the battery pack 10 is the pure air cooling mode, and the battery pack 10 is only air-cooled and dissipated through the dehumidification device 30. The air-cooling and dissipation dehumidifies the battery compartment and further reduces the ambient temperature of the battery compartment. The heat exchange between the battery pack 10 and the liquid cooling plate therein is enhanced through the turbulence of the exhaust air duct 32, thereby supporting the natural heat dissipation of the battery pack 10. When the battery system is not working, the battery pack 10 does not need to dissipate heat, the first solenoid valve 40 is closed, and the second solenoid valve 50 is closed when the battery compartment environment does not need to be dehumidified (the humidity has not reached the working threshold of the dehumidification module 31) and opened when the battery compartment environment needs to be dehumidified (the humidity reaches the working threshold of the dehumidification module 31). Therefore, the dehumidification system can dehumidify the battery compartment environment in time, thereby improving the safety and reliability of the system.

[0083] It should be noted that when the humidity of the battery compartment environment rises to the working threshold of the dehumidification module 31, the dehumidification module 31 starts to work; when the humidity drops below the set threshold, the dehumidification module 31 stops working. The specific working threshold of the dehumidification module 31 can be adjusted according to the battery compartment environment and the use environment, and is not specifically limited in this embodiment.

[0084] In some embodiments, the dehumidification device 30 also includes a condensation module 33, a fan 34, and a water collection box 35, wherein the condensation module 33 is arranged on the cooling pipe 311, and the condensation module 33 is located in the dehumidification air duct 312; the fan 34 is connected to the dehumidification module 31, and the fan 34 is arranged on the dehumidification air duct 312; the water collection box 35 is connected to the dehumidification module 31, and is arranged below the condensation module 33 for receiving the condensed water generated by the condensation module 33.

[0085] It is understandable that the condensation module 33 is arranged on the cooling pipe 311 and is located in the dehumidification air duct 312. The function of the condensation module 33 is to connect to the cold source in the cooling pipe 311, and the airflow in the dehumidification air duct 312 condenses into liquid water on its surface after contacting the condensation module 33. Through the condensation module 33, the dehumidification device 30 can remove moisture from the airflow in the battery compartment connected to the dehumidification air duct 312 to achieve a dehumidification effect; at the same time, the airflow in the connected battery compartment can be cooled to achieve a cooling and cooling effect. The fan 34 is connected to the dehumidification module 31 and is arranged on the dehumidification air duct 312. The function of the fan 34 is to generate an airflow to direct the airflow in the battery compartment connected to the dehumidification air duct 312 to the condensation module 33 to promote cooling and dehumidification. The operation of the fan 34 can increase air flow and improve the dehumidification effect. It should be noted that in the solution of setting up the air duct 60 , the fan 34 can also guide the gas in the battery compartment to flow from the air inlet of the air duct 60 to the dehumidification module 31 .

[0086] It should be noted that the condensation module 33 can adopt a condenser, which is usually composed of a metal pipe and a heat sink. The condenser cools the hot gas or moisture into a liquid state to achieve the condensation of moisture. The condenser is usually in contact with a cooling medium (such as water or a refrigerant), and condenses the moisture into water through the process of heat transfer and mass transfer. The condensation module 33 can also adopt a condensation plate, which is usually made of a heat-conducting material. The condensation plate cools the moisture into a liquid state by contacting the cooling medium. The surface of the condensation plate usually has a large surface area to increase the condensation effect. The condensation module 33 can also adopt a condensation tube, which is usually made of metal or plastic. The condensation tube cools the moisture on the surface of the pipe and condenses it into a liquid state by passing the moisture through the inside of the pipe. The design of the condensation tube can be adjusted according to specific needs, such as increasing the length of the pipe or increasing the surface area of ​​the pipe to improve the condensation effect. In this embodiment, the condensation module 33 can adopt the above-mentioned device or other devices to achieve the purpose of cooling and dehumidifying the gas, which is not specifically limited here.

[0087] It is understandable that the water receiving box 35 is used to receive the condensed water generated by the condensation module 33. During the dehumidification process, the condensation module 33 condenses moisture into liquid water through cooling. These condensed water droplets will be collected in the water receiving box 35. The water receiving box 35 is usually located below the condensation module 33 to facilitate the collection of condensed water. It can be designed as a container or a pipe, and the specific form can be adjusted according to the system design and requirements. The water receiving box 35 needs to have sufficient capacity to ensure that it can accommodate the condensed water generated by the condensation module 33, and needs to be sealed to prevent the condensed water from leaking. Through the water receiving box 35, the condensed water can be effectively collected and discharged to avoid adverse effects on the system and the environment. The condensed water can be further processed or discharged, or recycled when necessary. In order to facilitate the discharge of the condensed water in the water receiving box 35, a pipe can be set at the bottom of the water receiving box 35 to facilitate the discharge of the condensed water to the outside of the dehumidification module 31.

[0088] In some embodiments, there are multiple battery packs 10, which are arranged in sequence. There are multiple exhaust ports 321, which are arranged along the thickness direction of the battery pack 10 to direct airflow to at least one side of the battery pack 10 in the thickness direction.

[0089] It should be noted that the number of the exhaust ports 321 is n. 1 , the number of battery packs is n 2 , satisfying n 2 +1=n 1 That is, the exhaust port 321 is directed toward the gap between adjacent battery packs 10 or toward the gap between the inner wall of the battery compartment and the battery pack 10, so that the airflow discharged from the exhaust port 321 can flow through each side surface in the thickness direction of the battery pack 10, cooling the battery pack 10 and cooling and dehumidifying the environment near the battery pack 10.

[0090] Specifically, the size of each exhaust port 321 can be the same. The technical effects brought about include manufacturing simplification: the uniform size of the exhaust port 321 can simplify the manufacturing and installation process, reduce production complexity and cost. Standardized components are easier to mass produce and manage inventory. Design consistency: Exhaust ports 321 of the same size can simplify the design process, reduce the possibility of design changes, and improve the consistency and reliability of the design. Maintenance convenience: During maintenance and replacement, the use of exhaust ports 321 of the same size can reduce the variety of spare parts and reduce maintenance complexity and cost. Airflow uniformity: Exhaust ports 321 of the same size help to achieve uniform distribution of airflow, although this depends on the specific system configuration and airflow dynamics. Cost-effectiveness: Since the need for components of different sizes is reduced, material and production costs may be reduced, thereby improving overall cost-effectiveness. Modular design: Exhaust ports 321 of the same size help to achieve modular design, so that the system can be more easily expanded or adjusted.

[0091] Specifically, the size of at least one exhaust port 321 is different from the size of other exhaust ports 321. Because the gaps between adjacent battery packs 10 and the distances between the battery packs 10 and the inner wall of the battery compartment are different, the size of each exhaust port 321 can be designed accordingly. That is, the size of at least one exhaust port 321 is different from the size of other exhaust ports 321. In addition, the top of the battery compartment is generally a hot air gathering area, and the size of the exhaust port 321 at the top can be set to be larger than that of other exhaust ports 321, so that they all have a larger diversion capacity, thereby achieving a uniform effect of the ambient temperature of the battery compartment. It can be understood that in order to achieve a uniform cooling and dehumidification effect on the battery compartment environment, the size of the corresponding exhaust port 321 can be designed for different areas and different gaps in the battery compartment, so as to achieve a uniform cooling and dehumidification effect on the battery compartment environment by exhausting airflow from each exhaust port 321. That is, the size of the exhaust port 321 can be adjusted according to specific cooling requirements and space limitations to ensure optimal performance and efficiency.

[0092] The above is a detailed introduction to an energy storage system provided in an embodiment of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of each embodiment of the present application.

Claims

1. An energy storage system, characterized in that: include: Battery pack (10); A liquid cooling unit (20) is provided with a liquid cooling pipeline (21), wherein the liquid cooling pipeline (21) is connected to the battery pack (10); The dehumidification device (30) comprises a dehumidification module (31), wherein the dehumidification module (31) is provided with a cooling pipe (311) and a dehumidification air duct (312), wherein the cooling pipe (311) is connected to the liquid cooling unit (20) via the liquid cooling pipeline (21), wherein the cooling pipe (311) is configured to cool and dehumidify the airflow flowing through the dehumidification air duct (312), and wherein the dehumidification device (30) is configured to direct the airflow flowing through the dehumidification air duct (312) to the battery pack (10).

2. The energy storage system according to claim 1, characterized in that: The dehumidification device (30) further comprises an exhaust duct (32), wherein the exhaust duct (32) is connected to the dehumidification module (31) and communicates with an air outlet of the dehumidification duct (312); the exhaust duct (32) has an exhaust port (321), and the exhaust port (321) is used to direct the air flow to at least one side of the battery pack (10) in the thickness direction thereof.

3. The energy storage system according to claim 2, characterized in that: The exhaust air duct (32) comprises: A first shunt pipe (322) is arranged along the thickness direction of the battery pack (10), and the exhaust port (321) is opened on the first shunt pipe (322); The second shunt pipe (323) has one end connected to the first shunt pipe (322) and the other end connected to the dehumidification module (31), and is communicated with the air outlet of the dehumidification air duct (312).

4. The energy storage system according to claim 3, characterized in that: The second shunt tube (323) is arranged to extend along the length direction of the battery pack (10), or the second shunt tube (323) is arranged along the width direction of the battery pack (10).

5. The energy storage system according to claim 2, characterized in that: The dehumidification device (30) comprises an air duct (60), the air duct (60) is connected to the dehumidification module (31), and the air outlet of the air duct (60) is connected to the air inlet of the dehumidification air duct (312), and the air inlet of the air duct (60) is arranged close to the side of the battery pack (10) away from the air outlet (321).

6. The energy storage system according to claim 5, characterized in that: The air duct (60) is arranged to extend along the length direction of the battery pack (10), or the air duct (60) is arranged along the width direction of the battery pack (10).

7. The energy storage system according to claim 1, characterized in that: The liquid cooling pipeline (21) comprises: A first water inlet pipe (213), one end of which is connected to the water outlet of the liquid cooling unit (20), and the other end of the first water inlet pipe (213) is connected to the water inlet of the battery pack (10); A first water outlet pipe (214), one end of which is connected to the water inlet of the liquid cooling unit (20), and the other end of which is connected to the water outlet of the battery pack (10); A second water inlet pipe (215), one end of which is connected to the water outlet of the liquid cooling unit (20), and the other end of the second water inlet pipe (215) is connected to one end of the cooling pipe (311); A second water outlet pipe (216) has one end connected to the water inlet of the liquid cooling unit (20), and the other end of the second water outlet pipe (216) is connected to the other end of the cooling pipe (311).

8. The energy storage system according to claim 7, characterized in that: The energy storage system further comprises: a first solenoid valve (40), arranged on the first water inlet pipe (213), the first solenoid valve (40) being configured to control the communication between the liquid cooling unit (20) and the battery pack (10); A second solenoid valve (50) is disposed on the second water inlet pipe (215), and the second solenoid valve (50) is configured to control the communication between the liquid cooling unit (20) and the cooling pipeline (311).

9. The energy storage system according to claim 8, characterized in that: When the first solenoid valve (40) is opened and the second solenoid valve (50) is closed, the battery pack (10) is cooled by liquid cooling through the liquid cooling plate therein, and the dehumidification device (30) is closed; When the first solenoid valve (40) is closed and the second solenoid valve (50) is opened, the battery pack (10) is air-cooled by the dehumidification device (30), and the liquid cooling plate in the battery pack (10) is closed; When both the first solenoid valve (40) and the second solenoid valve (50) are opened, the battery pack (10) is cooled by liquid via the liquid cooling plate therein, and is cooled by air via the dehumidification device (30).

10. The energy storage system according to claim 1, characterized in that: The dehumidification device (30) further comprises: A condensation module (33) is arranged on the cooling pipe (311), and the condensation module (33) is located in the dehumidification air duct (312); A fan (34) connected to the dehumidification module (31), and the fan (34) is arranged on the dehumidification air duct (312); A water receiving box (35) is connected to the dehumidification module (31) and is disposed below the condensation module (33) for receiving condensed water generated by the condensation module (33).

11. The energy storage system according to claim 2, characterized in that: There are a plurality of battery packs (10), and the plurality of battery packs (10) are arranged in sequence and spaced apart from each other; There are a plurality of the exhaust ports (321), and the plurality of the exhaust ports (321) are arranged along the thickness direction of the battery pack (10) and are used to direct the airflow to at least one side of the battery pack (10) in the thickness direction thereof; The size of at least one of the air outlets (321) is different from the sizes of the other air outlets (321).

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