A lithium battery pack energy storage device and an energy storage system

Abstract

The present invention belongs to the technical field of lithium battery packs, and specifically relates to a lithium battery pack energy storage device and an energy storage system, including a container. Inside the container, a first partition board and a second partition board are sequentially arranged. A dehumidification mechanism is fixedly arranged on the container and near the position of the first partition board, and a control system is fixedly arranged on the container and near the position of the second partition board. A plurality of lithium battery racks are fixedly installed inside the container and between the first partition board and the second partition board, and a plurality of loading slots are formed on the lithium battery racks. By placing lithium battery packs in the charging and discharging states in the same space and arranging them in a staggered manner, and since the heat is in the same space, the air with higher heat will flow to the air environment with lower heat, thereby making the space around the lithium battery packs more balanced, reducing the targeted accumulation of heat around the lithium batteries, and thus greatly improving the safety of the lithium battery pack energy storage device.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery packs, and specifically relates to a lithium battery pack energy storage device and an energy storage system. Background Art

[0002] With the transformation of the global energy structure and the rapid development of renewable energy, energy storage technology has become a key link in solving the mismatch between energy supply and demand and improving energy utilization efficiency. Lithium batteries, with their advantages of high energy density, long cycle life, environmental protection and no pollution, have become one of the mainstream technologies in the current energy storage field;

[0003] Lithium batteries are extremely sensitive to humidity. Excessive humidity will cause the internal electrolyte of the battery to be diluted and the metal components to corrode, thereby affecting the performance and life of the battery.

[0004] In traditional technologies, the energy storage and energy release of lithium battery packs are divided into two different placement spaces. Inside these two spaces, the lithium batteries in the charging state have less heat and can ensure the safe use of the lithium batteries. In the other space, the lithium batteries in the discharging state will generate a large amount of heat. The rapid accumulation of heat and overheating will cause the internal electrolyte of the lithium battery to expand and decompose, generating a large amount of gas, thereby increasing the pressure inside the battery. This increase in pressure is likely to trigger safety accidents such as battery combustion and explosion, posing a serious threat to personal and property safety. Therefore, a lithium battery pack energy storage device and an energy storage system are proposed for the above problems. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art, the present invention proposes a lithium battery pack energy storage device and an energy storage system.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A lithium battery pack energy storage device and an energy storage system according to the present invention include a container. Inside the container, a first partition board and a second partition board are sequentially arranged. A dehumidification mechanism is fixedly arranged on the container and close to the position of the first partition board. A control system is fixedly arranged on the container and close to the position of the second partition board. Inside the container and between the first partition board and the second partition board, a plurality of lithium battery racks are fixedly installed. A plurality of loading slots are opened on the lithium battery racks. A first fixing frame and a second fixing frame are sequentially arranged on the loading slots. A plurality of first loading seats are fixedly arranged on the first fixing frame. A plurality of second loading seats are fixedly arranged on the second fixing frame. A plurality of third wiring rows are arranged on the outside of the first fixing frame. A plurality of fourth wiring rows are arranged on the outside of the second fixing frame. Lithium battery packs are arranged on both the first loading seats and the second loading seats. A first wiring row and a second wiring row are sequentially installed on both sides of the lithium battery racks on the container;

[0007] The dehumidification mechanism includes a dehumidification cabinet fixedly arranged on the container and near the position of the first partition board. An air inlet box is fixedly arranged on one side of the dehumidification cabinet close to the lithium battery rack. A flow plate is fixedly installed on the air inlet box. A plurality of flow holes are formed in the flow plate. A plurality of air inlet pipes communicating with the flow holes are fixedly arranged on the air inlet box and inside the flow plate. The air inlet pipes are integrally in an S-shaped structure, and a plurality of first flow deflectors and second flow deflectors are sequentially installed inside thereof. The first flow deflectors and the second flow deflectors are arranged in a staggered manner.

[0008] Preferably, a connection box is fixedly arranged on the top of the container, and a plurality of the first wiring rows and a plurality of the second wiring rows both extend to the inside of the connection box.

[0009] Preferably, a closed front door is arranged on the container and outside the control system, and a closed side door is arranged on the container and near the position of the lithium battery rack.

[0010] Preferably, the dehumidification mechanism further includes a fan group fixedly arranged inside the dehumidification cabinet and near the position of the air inlet box. A condenser is fixedly arranged on the dehumidification cabinet and on the side away from the air inlet box of the fan group. An evaporator is fixedly arranged on the condenser. An expansion valve and a compressor are sequentially arranged inside the dehumidification cabinet. A plurality of connecting pipes are fixedly connected to the compressor, and the plurality of connecting pipes are respectively connected to the expansion valve and the condenser.

[0011] Preferably, a water storage tank is fixedly arranged inside the dehumidification cabinet and above the compressor, and the water storage tank is connected to the condenser through a connecting pipe.

[0012] Preferably, a shutter is arranged on the dehumidification cabinet and outside the air inlet box, and a temperature sensor is fixedly arranged under the shutter on the outside of the dehumidification cabinet.

[0013] Preferably, the lithium battery pack includes loading sleeves respectively arranged on the first loading seat and the second loading seat. The lithium batteries are inserted into the loading sleeves, and a plurality of the lithium batteries are respectively electrically connected to the first wiring row and the second wiring row through the third wiring row and the fourth wiring row.

[0014] Preferably, the first loading seat and the second loading seat are arranged in a cross distribution.

[0015] Preferably, a lithium battery pack energy storage system includes:

[0016] Lithium battery pack, the lithium battery pack includes a first distributed lithium battery pack and a second distributed lithium battery pack. Both the first distributed lithium battery pack and the second distributed lithium battery pack can achieve energy storage and energy release. When the first distributed lithium battery pack stores energy, the second distributed lithium battery pack is used for energy release; when the first distributed lithium battery pack releases energy, the second distributed lithium battery pack is used for energy storage;

[0017] Control system, the control system includes a DC cabinet for collecting current and a DC busbar for electrical connection;

[0018] Energy storage distribution system, the energy storage distribution system is used to control the distribution of energy storage and energy release of the first distributed lithium battery pack and the second distributed lithium battery pack, so that the energy storage and energy release of the first distributed lithium battery pack and the second distributed lithium battery pack alternate;

[0019] Dehumidification mechanism, the dehumidification mechanism is used for dehumidification inside the lithium battery pack energy storage system.

[0020] Preferably, the first distributed lithium battery pack and the second distributed lithium battery pack are staggered to achieve uniform heat distribution during the heating process of the entire lithium battery pack energy storage system.

[0021] Advantages of the present invention:

[0022] The present invention provides a lithium battery pack energy storage device and an energy storage system. By placing lithium battery packs in a charging and discharging state in the same space and staggering them, and since heat is in the same space, the air with high heat will flow into the air environment with low heat, making the space around the lithium battery pack more balanced and reducing the targeted accumulation of heat around the lithium battery, thereby greatly improving the safety of the lithium battery pack energy storage device. Description of the drawings

[0023] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0024] In the drawings:

[0025] Figure 1 is the schematic structure of the container of the present invention Figure 1 ;

[0026] Figure 2 is the schematic structure of the container of the present invention Figure 2 ;

[0027] Figure 3 is the schematic structure diagram of the connection box in the present invention;

[0028] Figure 4It is a schematic structural diagram of the lithium battery rack in the present invention;

[0029] Figure 5 It is a schematic structural diagram of the loading sleeve in the present invention;

[0030] Figure 6 It is a schematic structural diagram of the first loading seat in the present invention;

[0031] Figure 7 It is a schematic structural diagram of the dehumidification cabinet in the present invention;

[0032] Figure 8 It is a schematic internal structural diagram of the dehumidification cabinet in the present invention;

[0033] Figure 9 It is a schematic structural diagram of the air inlet box in the present invention;

[0034] Figure 10 It is a schematic structural diagram of the air inlet pipe in the present invention.

[0035] Legend Explanation:

[0036] 1. Container; 2. Closed front door; 3. Connection box; 4. Closed side door; 5. First partition board; 6. Second partition board; 7. Dehumidification mechanism; 8. Control system; 9. First wiring row; 10. Second wiring row; 11. Lithium battery rack; 12. Loading slot; 13. First fixing rack; 14. Second fixing rack; 15. Third wiring row; 16. Fourth wiring row; 17. First loading seat; 18. Loading sleeve; 19. Lithium battery; 20. Second loading seat; 21. Dehumidification cabinet; 22. Fan group; 23. Condenser; 24. Evaporator; 25. Expansion valve; 26. Connecting pipe; 27. Compressor; 28. Temperature sensor; 29. Louver; 30. Air inlet box; 31. Water storage tank; 32. Air inlet pipe; 33. First spoiler; 34. Second spoiler; 35. Flow plate; 36. Flow hole. Detailed Implementation Manner

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0038] The following gives specific embodiments.

[0039] Please refer to Figures 1 - 10, the present invention provides a lithium battery pack energy storage device and an energy storage system, including a container 1. Inside the container 1, a first partition board 5 and a second partition board 6 are sequentially arranged. A dehumidification mechanism 7 is fixedly arranged on the container 1 near the position of the first partition board 5, and a control system 8 is fixedly arranged on the container 1 near the position of the second partition board 6. Inside the container 1 and between the first partition board 5 and the second partition board 6, a plurality of lithium battery racks 11 are fixedly installed. A plurality of loading slots 12 are opened on the lithium battery racks 11. A first fixing frame 13 and a second fixing frame 14 are sequentially arranged on the loading slots 12. A plurality of first loading seats 17 are fixedly arranged on the first fixing frame 13, and a plurality of second loading seats 20 are fixedly arranged on the second fixing frame 14. A plurality of third wiring rows 15 are arranged on the outside of the first fixing frame 13, and a plurality of fourth wiring rows 16 are arranged on the outside of the second fixing frame 14. Lithium battery packs are arranged on both the first loading seats 17 and the second loading seats 20. A first wiring row 9 and a second wiring row 10 are sequentially installed on both sides of the lithium battery racks 11 on the container 1;

[0040] The dehumidification mechanism 7 includes a dehumidification cabinet 21 fixedly arranged on the container 1 near the position of the first partition board 5. An air inlet box 30 is fixedly arranged on one side of the dehumidification cabinet 21 close to the lithium battery rack 11. A flow plate 35 is fixedly installed on the air inlet box 30. A plurality of flow holes 36 are opened on the flow plate 35. A plurality of air inlet pipes 32 communicated with the flow holes 36 are fixedly arranged inside the air inlet box 30 and located on the inner side of the flow plate 35. The air inlet pipes 32 are integrally in an S-shaped structure, and a plurality of first flow deflectors 33 and second flow deflectors 34 are sequentially installed inside thereof. The first flow deflectors 33 and the second flow deflectors 34 are arranged in an alternating manner.

[0041] When the device is in use, the container 1 is used to load the lithium battery pack, and it can make the device move on an engineering vehicle during loading, increasing the usage range of the device. Through the first partition board 5 and the second partition board 6 sequentially arranged inside the container 1, a safety area is formed inside the container 1 and between the first partition board 5 and the second partition board 6. The lithium batteries in this safety area can ensure their safety and prevent accidents during the use of the device. An intelligent fire protection system is arranged inside the safety area, which is a mature existing technology and will not be elaborated in this article. The dehumidification mechanism 7 fixedly arranged on the container 1 near the position of the first partition board 5 is used for the dehumidification work inside the device. Specifically, during the operation of the lithium battery, its temperature will rise. In the case of a large temperature difference between day and night, water droplets will condense inside the device due to the temperature difference and adsorb on the lithium battery or its electrical connection parts, which is likely to cause a short circuit of the lithium battery and result in an electrical fire. Through the dehumidification mechanism inside the device, the inside of the device can always be kept dry, thus ensuring the safe use of the lithium battery;

[0042] The control system 8 fixedly arranged on the container 1 and near the position of the second partition board 6 is used to control the energy storage and release of the lithium battery pack. A plurality of lithium battery racks 11 fixedly installed on the inner side of the container 1 and between the first partition board 5 and the second partition board 6 are used to cooperate with the plurality of loading slots 12 opened on the lithium battery racks 11 for loading the first fixing rack 13 and the second fixing rack 14. Multiple groups of the first fixing rack 13 and the second fixing rack 14 are arranged in the device and are staggered. The first fixing rack 13 and the second fixing rack 14 sequentially arranged on the loading slot 12 are used to load the lithium battery pack. A plurality of first loading seats 17 fixedly arranged on the first fixing rack 13 are used to load the loading sleeve 18. A plurality of second loading seats 20 fixedly arranged on the second fixing rack 14 are also used to load the loading sleeve 18. A plurality of third wiring rows 15 arranged on the outer side of the first fixing rack 13 are used for the electrical connection of the lithium battery pack on the first loading seat 17 to realize the energy storage and release of this group of lithium battery packs. A plurality of fourth wiring rows 16 arranged on the outer side of the second fixing rack 14 are used for the electrical connection of the lithium battery pack on the second loading seat 20 to realize the energy storage and release of this group of lithium battery packs. The lithium battery packs arranged on both the first loading seat 17 and the second loading seat 20 are used for the storage and release of electric energy. The first wiring row 9 and the second wiring row 10 sequentially installed on both sides of the lithium battery rack 11 on the container 1 are respectively used for the electrical connection of the third wiring row 15 and the fourth wiring row 16. The staggered first loading seat 17 and the second loading seat 20 separate the lithium battery packs on the two;

[0043] Lithium battery packs generate heat during both energy storage (charging) and energy release (discharging). Generally, the heat generated during discharging is higher than that during charging. First of all, chemical reactions are involved in both the charging and discharging processes of lithium batteries. These reactions are accompanied by energy conversion and thus generate heat. During charging, the positive electrode material of the lithium battery is oxidized, lithium ions move through the electrolyte to the negative electrode and are reduced by the negative electrode material, and heat is released during this process. During discharging, the process is reversed, but heat is also generated. By arranging the first mounting seat 17 and the second mounting seat 20 in an interleaved manner, it can ensure that the heat accumulation inside the container 1 is more uniform. In traditional technologies, the energy storage and energy release of lithium battery packs are in two different placement spaces. Inside these two spaces, the lithium batteries in the charging state generate less heat, which can ensure the safe use of lithium batteries. In the other space, the lithium batteries in the discharging state generate more heat. The rapid accumulation of heat and overheating can cause the electrolyte inside the lithium battery to expand and decompose, generating a large amount of gas, thereby increasing the pressure inside the battery. This increase in pressure is likely to trigger safety accidents such as battery combustion and explosion, posing a serious threat to personal and property safety. By placing the lithium battery packs in the charging and discharging states in the same space and in an interleaved manner, and since the heat is in the same space, the air with more heat will flow to the air environment with less heat, making the space around the lithium battery pack more balanced and reducing the accumulation of heat, thus greatly improving the safety of the energy storage device of the lithium battery pack;

[0044] The air inlet box 30 fixedly arranged on the side of the dehumidification cabinet 21 close to the lithium battery rack 11 is used to slow down the flow of the air inside the device, so that the air inside the container 1 extends its flow path after entering the dehumidification cabinet 21, thereby ensuring the improvement of the dehumidification effect of the dehumidification cabinet 21 on the hot air in the container 1;

[0045] Through the circulation plate 35 fixedly installed on the air inlet box 30 and the multiple circulation holes 36 opened on the circulation plate 35, the air in the container 1 enters the air inlet pipe 32 through the circulation holes 36. The multiple air inlet pipes 32 fixedly arranged on the air inlet box 30 and located inside the circulation plate 35 and connected to the circulation holes 36 are used to make the flow path of the air in the dehumidification cabinet 21 longer, so that the air stays in the dehumidification cabinet 21 for a longer time, thereby improving the dehumidification effect. The air inlet pipe 32 is integrally in an S-shaped structure and, in cooperation with the multiple first flow deflection plates 33 and second flow deflection plates 34 sequentially installed inside it, realizes the extension of the flow path of the air entering the dehumidification cabinet 21.

[0046] Further, as Figure 1 shown, a connection box 3 is fixedly arranged on the top of the container 1, and multiple first wiring rows 9 and multiple second wiring rows 10 both extend to the inside of the connection box 3.

[0047] When this device is in use, the connection box 3 fixedly arranged at the top of the container 1 is used for loading the first wiring row 9 and the second wiring row 10, and the control system 8 is connected to the inside of the connection box 3 through wires and is respectively connected to the first wiring row 9 and the second wiring row 10, so as to realize the energy storage and energy release distribution of this device.

[0048] Furthermore, as Figure 1 shown, a closed front door 2 is arranged on the container 1 and on the outer side of the control system 8, and a closed side door 4 is arranged on the container 1 and at a position close to the lithium battery rack 11.

[0049] When this device is in use, the closed front door 2 arranged on the container 1 and on the outer side of the control system 8 is used for staff to enter the inside of this device for maintenance, and the closed side door 4 arranged on the container 1 and at a position close to the lithium battery rack 11 is used to directly open or close the container 1 from the side of this device, so as to facilitate the loading and maintenance of the lithium battery pack.

[0050] Furthermore, as Figures 7 - 8 shown, the dehumidification mechanism further includes a fan group 22 fixedly arranged inside the dehumidification cabinet 21 and close to the air inlet box 30, a condenser 23 is fixedly arranged on the dehumidification cabinet 21 and on the side away from the air inlet box 30 of the fan group 22, an evaporator 24 is fixedly arranged on the condenser 23, an expansion valve 25 and a compressor 27 are sequentially arranged inside the dehumidification cabinet 21, and a plurality of connecting pipes 26 are fixedly connected to the compressor 27, and the plurality of connecting pipes 26 are respectively connected to the expansion valve 25 and the condenser 23.

[0051] When this device is in use, the fan group 22 fixedly arranged inside the dehumidification cabinet 21 and close to the air inlet box 30 is used to blow air through the condenser 23 and the evaporator 24 to promote the heat exchange process of this device. The condenser 23 fixedly arranged on the dehumidification cabinet 21 and on the side away from the air inlet box 30 of the fan group 22 is the place where the refrigerant releases heat. Here, the refrigerant changes from a gaseous state to a liquid state and releases the heat absorbed in the evaporator at the same time. The evaporator 24 fixedly arranged on the condenser 23 is the place where the refrigerant evaporates. It absorbs heat and moisture from the flowing air and makes the air dry. The expansion valve 25 arranged inside the dehumidification cabinet 21 is connected between the compressor 27 and the evaporator 24. It regulates the flow rate of the refrigerant to ensure that the refrigerant evaporates at an appropriate pressure and rate in the evaporator 24. The compressor 27 arranged inside the dehumidification cabinet 21 is the core component for dehumidifying this device. It is responsible for compressing the refrigerant to make it circulate in the system, thereby absorbing the heat and moisture in the air and realizing the dehumidification inside this device. The plurality of connecting pipes 26 fixedly connected to the compressor 27 are used for the internal pipe connection of the dehumidification cabinet 21 to make the refrigerant circulate and realize the dehumidification of moisture in the control.

[0052] Further, as Figures 7 - 9 shown, a water storage tank 31 is fixedly arranged inside the dehumidification cabinet 21 and above the compressor 27. The water storage tank 31 is connected to the condenser 23 through a connecting pipe 26.

[0053] When the device is in use, the water storage tank 31 fixedly arranged inside the dehumidification cabinet 21 and above the compressor 27 is used to collect the moisture in the air during the dehumidification process of the dehumidification cabinet 21, preventing water from remaining inside the dehumidification cabinet 21 or the container 1 and affecting the safe operation of the device. The water storage tank 31 is connected to the condenser 23 through the connecting pipe 26.

[0054] Further, as Figure 8 shown, a shutter 29 is arranged outside the air inlet box 30 on the dehumidification cabinet 21, and a temperature sensor 28 is fixedly arranged below the shutter 29 outside the dehumidification cabinet 21.

[0055] When the device is in use, the shutter 29 arranged outside the air inlet box 30 on the dehumidification cabinet 21 is used as the air inlet, and the temperature sensor 28 fixedly arranged below the shutter 29 outside the dehumidification cabinet 21 is used to detect the ambient temperature inside the device. As the temperature rises, the dehumidification power of the dehumidification mechanism 7 inside the device is increased.

[0056] Further, as Figures 5 - 6 shown, the lithium battery pack includes loading sleeves 18 respectively arranged on a first loading seat 17 and a second loading seat 20. Lithium batteries 19 are inserted into the loading sleeves 18, and multiple lithium batteries 19 are electrically connected to a first wiring row 9 and a second wiring row 10 through a third wiring row 15 and a fourth wiring row 16 respectively.

[0057] When the device is in use, the loading sleeves 18 respectively arranged on the first loading seat 17 and the second loading seat 20 are used to load the lithium batteries 19, and the loading sleeves 18 are made of insulating materials. The lithium batteries 19 inserted into the loading sleeves 18 are used as carriers for energy storage and energy release of the device. Multiple lithium batteries 19 are electrically connected to the first wiring row 9 and the second wiring row 10 through the third wiring row 15 and the fourth wiring row 16 respectively, thereby realizing the processes of electrical energy storage and energy release.

[0058] Further, as Figure 6 shown, the first loading seat 17 and the second loading seat 20 are arranged in a cross distribution.

[0059] When this device is in use, the first loading seat 17 and the second loading seat 20 are cross-distributed, and the lithium battery packs on both of them are divided into two parts: a battery pack for energy storage and a battery pack for energy release. During operation, the staggered distribution of the first loading seat 17 and the second loading seat 20 can ensure that the heat accumulation inside the container 1 is more uniform. In the traditional technology, the energy storage and energy release of the lithium battery pack are divided into two different placement spaces. Inside these two spaces, the lithium batteries in the charging state generate less heat, which can ensure the safe use of the lithium batteries. In the other space, the lithium batteries in the discharging state generate more heat. The rapid accumulation of heat and overheating can cause the electrolyte inside the lithium battery to expand and decompose, generating a large amount of gas, thereby increasing the pressure inside the battery. This increase in pressure is likely to trigger safety accidents such as battery combustion and explosion, posing a serious threat to personal and property safety. With this device, the lithium battery packs in the charging and discharging states are placed in the same space and are staggered. Also, because the heat is in the same space, the air with more heat will flow to the air environment with less heat, making the space around the lithium battery pack more balanced.

[0060] Further, as Figures 1 - 10 shown, a lithium battery pack energy storage system includes:

[0061] A lithium battery pack, which includes a first distributed lithium battery pack and a second distributed lithium battery pack. Both the first distributed lithium battery pack and the second distributed lithium battery pack can achieve energy storage and energy release. When the first distributed lithium battery pack stores energy, the second distributed lithium battery pack is used for energy release; when the first distributed lithium battery pack releases energy, the second distributed lithium battery pack is used for energy storage;

[0062] A control system 8, which includes a DC cabinet for collecting current and a DC busbar for electrical connection;

[0063] An energy storage distribution system, which is used to control the distribution of energy storage and energy release of the first distributed lithium battery pack and the second distributed lithium battery pack, so that the energy storage and energy release of the first distributed lithium battery pack and the second distributed lithium battery pack alternate;

[0064] A dehumidification mechanism 7, which is used for dehumidification inside the lithium battery pack energy storage system.

[0065] When this device is in use, the system includes two distributed lithium battery packs, namely the first distributed lithium battery pack and the second distributed lithium battery pack. Both of these lithium battery packs have the functions of energy storage and energy release. Their working modes are backup and alternation with each other to improve the stability and service life of the system. The first distributed lithium battery pack and the second distributed lithium battery pack work alternately. When one battery pack is storing energy, the other battery pack is releasing energy, and vice versa. Thus, it can ensure that during the continuous operation of the system, there is always one battery pack in the working state, improving the reliability and continuous power supply ability of the system;

[0066] The DC cabinet is used to collect and distribute the current generated by the lithium battery packs to ensure the effective transmission of electric energy. The DC busbar, as an electrical connection component, connects each battery pack and the DC cabinet to ensure the efficient flow of current;

[0067] The energy storage distribution system, through intelligent control algorithms, reasonably distributes the energy storage and energy release tasks according to the system requirements and the battery pack status. This distribution method can improve the utilization rate of the battery packs, extend the battery life, and ensure the high efficiency of the system operation;

[0068] Lithium batteries are prone to corrosion and performance degradation in a humid environment. The dehumidification mechanism can effectively reduce the humidity inside the system to ensure the stable operation of the battery packs. By maintaining an appropriate environmental humidity, the dehumidification mechanism helps to improve the service life and safety of the lithium battery packs.

[0069] Furthermore, the first distributed lithium battery pack and the second distributed lithium battery pack are arranged in a staggered manner to achieve uniform heat distribution during the heat generation process of the entire lithium battery pack energy storage system. When this device is in use, lithium batteries generate heat during the charging and discharging process. If the heat cannot be dissipated in a timely and effective manner, it will cause the battery temperature to rise. High temperature will affect the performance of the lithium batteries, and may even cause battery damage, shortened life or safety problems. Uniform heat distribution helps to maintain the temperature balance of each battery cell in the battery pack, thereby improving the stability and safety of the entire system;

[0070] The first distributed lithium battery pack and the second distributed lithium battery pack are not simply arranged side by side, but are arranged in a staggered or spaced manner. This staggered layout can increase the air circulation space between the battery packs, which helps with heat transfer and dissipation. The staggered distribution enables the heat between the battery packs to be transferred more effectively through natural convection or forced ventilation. When one battery pack generates heat during the energy release process, the staggered design helps to transfer the heat to the surrounding air or the cooling system, rather than directly to the adjacent battery pack. This can reduce the temperature rise of the adjacent battery packs and avoid local overheating.

[0071] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A lithium battery energy storage device, comprising a container (1), characterized in that: Inside the container (1), a first partition board (5) and a second partition board (6) are sequentially arranged. A dehumidification mechanism (7) is fixedly arranged on the container (1) near the position of the first partition board (5), and a control system (8) is fixedly arranged on the container (1) near the position of the second partition board (6). Inside the container (1) and between the first partition board (5) and the second partition board (6), a plurality of lithium battery racks (11) are fixedly installed. A plurality of loading slots (12) are formed on the lithium battery racks (11). A first fixing frame (13) and a second fixing frame (14) are sequentially arranged on the loading slots (12). A plurality of first loading seats (17) are fixedly arranged on the first fixing frame (13), and a plurality of second loading seats (20) are fixedly arranged on the second fixing frame (14). A plurality of third wiring rows (15) are arranged on the outer side of the first fixing frame (13), and a plurality of fourth wiring rows (16) are arranged on the outer side of the second fixing frame (14). Lithium battery packs are arranged on both the first loading seats (17) and the second loading seats (20). A first wiring row (9) and a second wiring row (10) are sequentially installed on both sides of the lithium battery racks (11) on the container (1); The first loading seats (17) and the second loading seats (20) are cross - distributed. In the same space, when the lithium battery pack on the first loading seat (17) is in the energy storage state, the lithium battery pack on the second loading seat (20) is in the energy release state; The dehumidification mechanism (7) includes a dehumidification cabinet (21) fixedly arranged on the container (1) near the position of the first partition board (5). An air inlet box (30) is fixedly arranged on one side of the dehumidification cabinet (21) close to the lithium battery racks (11). A flow - through plate (35) is fixedly installed on the air inlet box (30). A plurality of flow - through holes (36) are formed on the flow - through plate (35). A plurality of air inlet pipes (32) communicating with the flow - through holes (36) are fixedly arranged on the air inlet box (30) inside the flow - through plate (35). The air inlet pipes (32) are integrally in an S - shaped structure, and a plurality of first flow - disturbing vanes (33) and second flow - disturbing vanes (34) are sequentially installed inside it. The first flow - disturbing vanes (33) and the second flow - disturbing vanes (34) are cross - distributed.

2. The energy storage device for a lithium battery pack according to claim 1, characterized in that: A connection box (3) is fixedly arranged on the top of the container (1). A plurality of the first wiring rows (9) and a plurality of the second wiring rows (10) all extend to the inside of the connection box (3).

3. The energy storage device for a lithium battery pack according to claim 1, wherein: A closed front door (2) is arranged on the container (1) outside the control system (8), and a closed side door (4) is arranged on the container (1) near the position of the lithium battery racks (11).

4. A lithium battery pack energy storage device according to claim 1, characterized in that: The dehumidification mechanism further includes a blower group (22) fixedly arranged inside the dehumidification cabinet (21) and close to the air inlet box (30). A condenser (23) is fixedly arranged on the dehumidification cabinet (21) and on the side of the blower group (22) away from the air inlet box (30). An evaporator (24) is fixedly arranged on the condenser (23). An expansion valve (25) and a compressor (27) are sequentially arranged inside the dehumidification cabinet (21). A plurality of connecting pipes (26) are fixedly connected to the compressor (27), and the plurality of connecting pipes (26) are respectively connected to the expansion valve (25) and the condenser (23).

5. A lithium battery pack energy storage device according to claim 4, characterized in that: A water storage tank (31) is fixedly arranged inside the dehumidification cabinet (21) and above the compressor (27). The water storage tank (31) is connected to the condenser (23) through a connecting pipe (26).

6. The energy storage device for a lithium battery pack according to claim 1, wherein: A shutter (29) is arranged on the dehumidification cabinet (21) and outside the air inlet box (30). A temperature sensor (28) is fixedly arranged outside the dehumidification cabinet (21) and below the shutter (29).

7. A lithium battery pack energy storage device according to claim 1, characterized in that: The lithium battery pack includes loading sleeves (18) respectively arranged on the first loading seat (17) and the second loading seat (20). Lithium batteries (19) are inserted into the loading sleeves (18), and the plurality of lithium batteries (19) are respectively electrically connected to the first wiring row (9) and the second wiring row (10) through the third wiring row (15) and the fourth wiring row (16).

8. A lithium battery pack energy storage system is applied to a lithium battery pack energy storage device according to any one of claims 1 to 7, and is characterized in that, Comprising: A lithium battery pack, the lithium battery pack includes a first distributed lithium battery group and a second distributed lithium battery group. Both the first distributed lithium battery group and the second distributed lithium battery group can achieve energy storage and energy release. When the first distributed lithium battery group stores energy, the second distributed lithium battery group is used for energy release; when the first distributed lithium battery group releases energy, the second distributed lithium battery group is used for energy storage; A control system (8), the control system includes a DC cabinet for collecting current and a DC bus bar for electrical connection; An energy storage distribution system, the energy storage distribution system is used to control the distribution of energy storage and energy release of the first distributed lithium battery group and the second distributed lithium battery group, so that the energy storage and energy release of the first distributed lithium battery group and the second distributed lithium battery group alternate; A dehumidification mechanism (7), the dehumidification mechanism (7) is used for dehumidifying inside the lithium battery pack energy storage system.

9. The energy storage system of a lithium battery pack according to claim 8, wherein: The first distributed lithium battery group and the second distributed lithium battery group are arranged in an interleaved manner to achieve uniform heat distribution during the heating process of the entire lithium battery pack energy storage system.

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