Stacked liquid-cooled energy storage system

Abstract

The present application relates to the technical field of energy storage, in particular to a stacked liquid-cooled energy storage system, comprising a battery cabinet, a plurality of battery packs and a plurality of positioning mechanisms, two positioning mechanisms and the battery cabinet form a first air duct, the positioning mechanism comprises a first positioning member and a second positioning member, the bottom of the first positioning member is provided with a groove; the plurality of battery packs are installed in the battery cabinet by adopting a stacked mode, so that the plurality of battery packs can be quickly installed without setting a complex mounting structure or increasing or decreasing the mounting structure in the battery cabinet, the manufacturing cost of the battery cabinet can be reduced, different numbers of battery packs can be installed according to different needs of customers, the effect of customizing power can be achieved, the two battery packs can be connected through the positioning mechanism, so that the plurality of battery packs can be quickly and stably positioned and connected when stacked, and the alignment installation is more accurate.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and more specifically to a stacked liquid-cooled energy storage system. Background Technology

[0002] To ensure the safe and reliable operation of the energy storage system, a temperature regulation system is added to the energy storage system to ensure that the energy storage system is within a suitable operating temperature range. The temperature regulation system is divided into two main categories: air-cooled system and liquid-cooled system. The liquid-cooled system mainly includes two categories: container and outdoor cabinet. Their common feature is that multiple battery packs (5 to 8) are combined into a cluster, with the smallest single cluster being a unit, and multiple clusters are combined to form a system.

[0003] For existing containers and outdoor cabinets, integrating two or more battery packs into one container or outdoor cabinet has the following disadvantages: 1. The container body and outdoor cabinet body are large in volume, resulting in high transportation costs. At the same time, the arrangement and installation of battery packs and pipelines depend on the installation structure set in the container or cabinet. Setting multiple installation structures in the container or cabinet not only increases the cost in terms of design and production, but also easily leads to the waste of internal installation space. For the same amount of power, the container or outdoor cabinet occupies a large area and has low energy density; 2. When a single battery pack experiences thermal runaway, it can easily lead to the loss of the entire container or outdoor cabinet. In addition, the battery pack is not conducive to installation, replacement and maintenance. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a stacked liquid-cooled energy storage system, in which the battery pack is the smallest unit, and multiple battery packs are detachably stacked in a battery cabinet. Its modular design not only allows customers to customize the power capacity, but also prevents the entire container or outdoor cabinet from being damaged in the event of thermal runaway of a single battery pack. Furthermore, the battery pack can be quickly installed, disassembled, replaced, or repaired.

[0005] The technical solution adopted in this invention is as follows: A stacked liquid-cooled energy storage system includes a battery cabinet and multiple battery packs installed in the battery cabinet. The multiple battery packs are stacked in a row along their height direction in the battery cabinet. Along the width direction of the battery packs, at least two positioning mechanisms are respectively arranged at intervals on both sides of the battery packs. A first air passage is formed between the two positioning mechanisms and the battery cabinet. The positioning mechanism includes a first positioning member and a second positioning member. The first positioning member is fixedly connected to or integrally formed with the shell of the battery pack. The second positioning member is disposed on the top of the first positioning member. A groove is provided at the bottom of the first positioning member. When adjacent battery packs are stacked and installed, the second positioning member extends into the groove and engages with the groove. The battery pack is the smallest unit.

[0006] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0007] 1. Multiple battery packs are stacked in the battery cabinet, which eliminates the need for complex installation structures or adding / removing installation structures in the battery cabinet, thus enabling rapid installation of multiple battery packs and reducing the manufacturing cost of the battery cabinet. At the same time, different numbers of battery packs can be installed according to different customer needs, achieving the effect of customized power. Furthermore, pre-installed battery packs can be provided on a platform, enabling faster compatibility with high-voltage and low-voltage systems.

[0008] 2. Its modular design, by setting the battery pack as the smallest unit, makes it more convenient to stack and install multiple battery packs or to disassemble, replace or repair them when they are damaged.

[0009] 3. The two battery packs can be connected by the first positioning member and the second positioning member, so that multiple battery packs can be quickly connected when stacked. By setting multiple positioning mechanisms on the side of the battery pack, the stacking of the battery packs is more accurately aligned and the connection is more stable. At the same time, the groove can be used to install hooks to suspend the battery packs, so that no additional suspending structure is needed, and the suspending is more stable and convenient.

[0010] 4. The two positioning mechanisms form a first air passage with the battery cabinet, which is conducive to the natural heat dissipation of the battery pack. The first air passage can also be used to install pipes, optimize the wiring layout in the battery cabinet, and improve its internal space utilization and energy density.

[0011] In a preferred embodiment of the present invention, the top surface of the first positioning member is higher than the top surface of the battery pack, so that when two adjacent battery packs are connected by the positioning mechanism, a second air passage is formed between the two battery packs.

[0012] In this solution, since the top surface of the first positioning member is higher than the top surface of the battery pack, when the two battery packs are connected together by multiple positioning mechanisms, a second air passage is formed between the two battery packs. This facilitates the self-heating of the battery pack, the liquid cooling system, and the fire-fighting pipeline, resulting in better cooling of the liquid cooling pipeline and improved pipeline lifespan. Furthermore, when the battery pack experiences thermal runaway, the physically isolated battery packs help suppress the spread of thermal runaway during a fire and facilitate the flow of gas during thermal runaway and subsequent fire-fighting operations.

[0013] In a preferred embodiment of the present invention, the bottom surface of the first positioning member is lower than the bottom surface of the battery pack.

[0014] In this solution, by setting the bottom surface of the first positioning member below the bottom surface of the battery pack, the positioning mechanism can be used as a hoisting structure. During hoisting, the positioning mechanism can be fastened, thus eliminating the need for an additional hoisting structure and making hoisting more stable and convenient.

[0015] In a preferred embodiment of the present invention, when multiple battery packs are stacked and installed by multiple positioning mechanisms, the multiple positioning mechanisms are sequentially connected to form a vertical beam structure.

[0016] In this solution, multiple positioning mechanisms are vertically connected to form a vertical beam structure, which increases the stability of the multiple battery packs after stacking and installation, and can reduce the need for additional vertical beam structures, thereby improving the installation efficiency of the system.

[0017] In a preferred embodiment of the present invention, the first positioning member is provided with a locking member for locking the first positioning member and the second positioning member when the second positioning member is inserted into the groove.

[0018] In this solution, the locking component can be a bolt, pin, buckle, or other means. The locking component can improve the stability of the connection between the positioning mechanisms. Furthermore, the clamp at the end of the locking component can cooperate with the second air duct to install the branch pipes of the liquid cooling pipe and the fire protection pipe. This facilitates the routing and connection of the branch pipes to individual battery packs, optimizes the layout of the lines, and improves the stability of the pipeline installation.

[0019] In a preferred embodiment of the present invention, two liquid cooling pipes and one fire-fighting pipe are also included. The liquid cooling pipes and the fire-fighting pipe are installed in the first air duct. One liquid cooling pipe is used to introduce coolant into each of the liquid cooling plates of the battery packs respectively, and the other liquid cooling pipe is used to remove heat from the coolant outlet. The fire-fighting pipe is used for thermal runaway fire suppression of multiple battery packs.

[0020] In this solution, the liquid cooling pipe and the fire-fighting pipe are installed in the first air duct formed between the multiple positioning mechanisms and the battery cabinet, without the need for additional wiring structures. This is beneficial for the wiring layout of the liquid cooling pipe and the fire-fighting pipe, while also improving the space utilization rate of the battery cabinet and the energy density of a single battery cabinet. Furthermore, the positioning mechanism can limit the pipe position, improving the stability of pipe installation and facilitating system transportation.

[0021] In a preferred embodiment of the present invention, an energy storage high-voltage box is provided above, below, or between two adjacent battery packs forming a battery cluster for battery pack power management and status monitoring, and a fire detector is provided on the top of the battery cabinet for fire monitoring.

[0022] In a preferred embodiment of the present invention, the battery cabinet includes a base, a top sealing plate, and a perimeter sealing plate disposed between the base and the top sealing plate. The perimeter sealing plate is formed by a front sealing plate, a back sealing plate, and two side sealing plates.

[0023] In this solution: 1. The base and the top sealing plate are provided with the same positioning mechanism, which is beneficial for stacking multiple battery packs in the battery cabinet; 2. The base, the top sealing plate, and the surrounding sealing plates are made of stainless steel, which together can provide heat preservation, protection against solar radiation, and protection of internal pipes and cables, etc. After the battery cabinet is assembled, multiple battery packs can be directly stacked in the battery cabinet. Compared with the design, processing, production, assembly, and transportation of containers and outdoor cabinets in the prior art, the battery cabinet of the present invention has a simple structure, lower processing and production costs, lighter weight, and more convenient assembly and transportation.

[0024] In a preferred embodiment of the present invention, a lifting ring is fixedly connected to the upper surface of the top sealing plate.

[0025] In this solution, the lifting ring can be used to hoist the battery cabinet, facilitating its assembly or transportation.

[0026] In a preferred embodiment of the present invention, a base tray is also included, on which multiple battery cabinets are arranged side by side. The base tray is also equipped with a liquid cooling unit, a fire protection cabinet, and an electrical cabinet. The liquid cooling unit is used to circulate coolant in conjunction with the liquid cooling pipes to keep the equipment in the battery cabinets within a suitable operating temperature range. The fire protection cabinet is used in conjunction with the fire protection pipes to provide fire control strategies for the battery pack. The electrical cabinet is used for power convergence, signal feedback processing, and status monitoring of each unit of the energy storage liquid cooling system.

[0027] In this solution, through modular design, different numbers of battery cabinets can be set on the bottom tray as needed, which can more efficiently combine the required liquid-cooled energy storage system. The power can be customized at any time according to different customer needs, which is convenient for transportation. At the same time, by separating the liquid-cooled unit, the fire cabinet and the electrical cabinet from the battery cabinet and installing them separately on the bottom tray, it is beneficial to customize the power, and the assembly, transportation and maintenance work are more convenient. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the stacked liquid-cooled energy storage system of the present invention.

[0029] Figure 2 This is a schematic diagram showing the connection between the battery pack and the positioning mechanism in Embodiment 1 of the stacked liquid-cooled energy storage system of the present invention.

[0030] Figure 3 This is a schematic diagram of the connection between the first connector and the locking component in Embodiment 1 of the stacked liquid-cooled energy storage system of the present invention.

[0031] Figure 4 This is a schematic diagram showing the connection between the second positioning component and the guide rod in Embodiment 2 of the stacked liquid-cooled energy storage system of the present invention.

[0032] Figure 5 This is a schematic diagram showing the connection between the second positioning component and the first positioning component in Embodiment 2 of the stacked liquid-cooled energy storage system of the present invention.

[0033] Figure 6 This is an exploded view of Embodiment 3 of the stacked liquid-cooled energy storage system of the present invention.

[0034] Figure 7 This is a schematic diagram of the overall structure of Embodiment 4 of the stacked liquid-cooled energy storage system of the present invention.

[0035] The attached reference numerals include: 1-battery cabinet, 101-base, 102-top sealing plate, 103-surround sealing plate, 1031-front sealing plate, 1032-back sealing plate, 1033-side sealing plate, 2-battery pack, 3-liquid cooling pipe, 4-fire protection pipe, 5-positioning mechanism, 51-first positioning component, 52-second positioning component, 53-groove, 54-cavity, 55-guide through hole, 56-guide rod, 57-locking component, 6-first air duct, 7-second air duct, 8-energy storage high-pressure box, 9-fire detector, 10-insulation cotton, 11-exhaust hole, 12-lifting ring, 13-bottom tray, 14-liquid cooling unit, 15-fire cabinet, 16-electrical cabinet. Detailed Implementation

[0036] Typical embodiments embodying the features and advantages of the present invention will be specifically described in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0037] In the description of this application, the terms "first", "second", "side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] Example 1

[0039] This embodiment is basically as follows: Figures 1 to 3As shown, this embodiment discloses a stacked liquid-cooled energy storage system, including a battery cabinet 1 and multiple battery packs 2 installed in the battery cabinet 1. The multiple battery packs 2 are stacked in a row along their height direction in the battery cabinet 1. Along the width direction of the battery packs 2, at least two positioning mechanisms 5 are respectively arranged at intervals on both sides of the battery packs 2. A first air passage 6 is formed between the two positioning mechanisms 5 and the battery cabinet 1. The positioning mechanism 5 includes a first positioning member 51 and a second positioning member 52. The first positioning member 51 is fixedly connected to or integrally formed with the shell of the battery pack 2. The second positioning member 52 is disposed on the top of the first positioning member 51. A groove 53 is provided at the bottom of the first positioning member 51. When adjacent battery packs 2 are stacked, the second positioning member 52 extends into the groove 53 and engages with the groove 53. The battery pack 2 is the smallest unit.

[0040] The top surface of the first positioning member 51 is higher than the top surface of the battery pack 2, and the bottom surface of the first positioning member 51 is lower than the bottom surface of the battery pack 2, so that when two adjacent battery packs 2 are connected by the positioning mechanism 5, a second air passage 7 is formed between the two battery packs 2.

[0041] When multiple battery packs 2 are stacked and installed by multiple positioning mechanisms, the multiple positioning mechanisms are connected in sequence to form a vertical beam structure.

[0042] The first positioning member 51 is provided with a locking member 57, which is used to lock the first positioning member 51 and the second positioning member 52 when the second positioning member 52 is inserted into the groove 53.

[0043] It also includes two liquid cooling pipes 3 and one fire-fighting pipe 4. The liquid cooling pipes 3 and the fire-fighting pipe 4 are installed in the first air duct 6. One of the liquid cooling pipes 3 is used to introduce coolant into each of the liquid cooling plates of the battery pack 2, and the other liquid cooling pipe 3 is used to cool the water out and carry away the heat. The fire-fighting pipe 4 is used for thermal runaway fire protection of multiple battery packs 2.

[0044] A high-voltage energy storage box 8 is provided above, below, or between two adjacent battery packs 2 to form a battery cluster. This box is used for power management and status monitoring of the battery packs 2. A fire detector 9 is provided on the top of the battery cabinet 1 to monitor for fires.

[0045] In this embodiment, the multiple battery cells in the battery pack 2 are arranged horizontally. When multiple battery packs 2 are installed in the battery cabinet 1: First, the multiple battery packs 2 are stacked in the battery cabinet 1, thus eliminating the need for complex installation structures or adding / removing installation structures in the battery cabinet 1, enabling rapid installation of multiple battery packs 2, reducing the manufacturing cost of the battery cabinet 1. Furthermore, different numbers of battery packs 2 can be installed according to different customer needs, achieving customized power output. Secondly, pre-installed battery packs 2 can be provided, allowing for faster compatibility with high-voltage and low-voltage systems. Second, two battery packs 2 can be connected by the second positioning member 52 and the recessed area at the bottom of the first positioning member 51. The slot 53 is designed for quick and stable positioning and connection of multiple battery packs 2 when stacked, resulting in more accurate alignment. Third, the slot 53 can be fitted with hooks to suspend the battery packs 2. Simultaneously, the bottom surface of the first positioning member 51 is positioned below the bottom surface of the battery packs 2. In this case, the positioning mechanism 5 can serve as a slinging structure; during slinging, simply fasten the positioning mechanism 5, eliminating the need for additional slinging structures and making slinging more stable and convenient. Fourth, the two positioning mechanisms 5 form a first air duct 6 between themselves and the battery cabinet 1, which facilitates natural heat dissipation of the battery packs 2. The first air duct 6 can also be used to install pipes, optimizing the wiring layout within the battery cabinet 2 and improving its internal space utilization and energy density.

[0046] After multiple battery packs 2 are installed in the battery cabinet 1 via multiple positioning mechanisms 5: 1. The liquid cooling pipe 3 and the fire-fighting pipe are installed in the first air duct 6 formed between the multiple positioning mechanisms 5 and the battery cabinet 1, eliminating the need for additional wiring structures. This facilitates the wiring layout of the liquid cooling pipe 3 and the fire-fighting pipe 4, while also improving the space utilization of the battery cabinet 1 and the energy density of a single battery cabinet 1. Furthermore, the positioning mechanisms 5 can limit the pipe movement, improving the stability of pipe installation and facilitating system transportation; 2. The multiple positioning mechanisms 5 are vertically connected to form a vertical beam structure, increasing the stability of the stacked battery packs 2 and reducing the need for additional vertical beam structures, thus improving system installation efficiency; 3. Since the top surface of the first positioning member 51 is higher than the top surface of the battery pack 2, and the bottom surface of the first positioning member 51 is lower than the bottom surface of the battery pack 2, when two... After the battery packs 2 are connected together by multiple positioning mechanisms 5, a second air passage 7 is formed between two battery packs 2. This facilitates the self-heating of the battery packs 2, the liquid cooling pipes 3, and the fire-fighting pipes 4. The cooling effect of the liquid cooling pipes 3 is better, which improves the service life of the pipeline. At the same time, when the battery packs 2 experience thermal runaway, the physically isolated battery packs 2 can help suppress the spread of thermal runaway in the event of a fire, and also facilitate the flow of gas during thermal runaway and subsequent fire-fighting work. Fourth, the locking member 57 can be made of bolts, pins, buckles, etc. The locking member 57 can improve the stability of the connection between the positioning mechanisms 5. The clamp at the end of the locking member 57 can cooperate with the second air passage 7 to install the branch pipes of the liquid cooling pipes 3 and the fire-fighting pipes 4. This facilitates the routing and connection of branch pipes to individual battery packs 2, optimizes the layout of the line, and improves the stability of the pipeline installation.

[0047] The energy storage high-voltage box 8, through its integrated design, concentrates switching, control, and protection functions into a single battery cabinet 1, reducing the number of devices and floor space. It also enables automatic power monitoring and control, improving system response speed and stability. The fire detector 9 is used to monitor fires, initiate fire extinguishing procedures, and adjust the operating status of the energy storage equipment. The working principles and structures of the energy storage high-voltage box 8 and the fire detector 9 are existing technologies and will not be elaborated upon here. The positioning mechanism 5 can also be installed on the side of the energy storage high-voltage box 8, allowing for adjustments to its installation position according to different project layouts. This enables it to be combined and installed in various locations within the battery cabinet 1 cluster, improving the space utilization rate within the battery cabinet 1. The fire detector 9 is installed on the top of the battery cabinet 1 and works in conjunction with the second air duct 7 to facilitate gas flow when the battery pack 2 experiences thermal runaway, enabling timely activation of fire-fighting measures. Each battery pack 2 is equipped with a nozzle and a sensor, so that when any battery pack 2 experiences thermal runaway, it can be accurately located through its corresponding sensor and the fire-fighting pipe 4, thereby accurately extinguishing the thermal runaway battery pack 2. Compared with the prior art where more than two battery clusters are directly integrated into a container or outdoor cabinet, thermal runaway will directly destroy the entire container or cabinet. The stacked liquid-cooled energy storage system of the present invention can realize fire-fighting of a single battery pack 2 and prevent thermal runaway from damaging other battery packs 2.

[0048] Example 2

[0049] The difference between this embodiment and Embodiment 1 is that: Figure 4 and Figure 5 As shown, the top of the first positioning member 51 is provided with a cavity 54 for the second positioning member 52 to slide and be housed. The side of the second positioning member 52 is provided with a guide hole 55, which communicates with the cavity 54. A guide rod 56 is provided on the outer circumferential surface of the second positioning member 52. One end of the guide rod 56 is fixedly connected to the second positioning member 52, and the other end extends out of the first positioning member 51 through the guide hole 55.

[0050] In this embodiment, the second positioning member 52 is cylindrical, and the diameter and height of the cavity 54 match the diameter and height of the second positioning member 52. The guide hole 55 includes a vertical part and a horizontal part. When the battery pack 2 needs to be disassembled, replaced, or repaired, the guide rod 56 on the side of the target battery pack 2 is rotated. The guide rod 56 moves along the horizontal part of the guide hole 55. When the guide rod 56 moves to the bottom of the horizontal part, the second positioning member 52 slides completely into the cavity 54. The above operation is repeated to slide the second positioning member 52 of the battery pack 2 below into the first positioning member 51. Then, the locking member 57 between the two positioning mechanisms 5 is released, and the target battery pack 2 is pried and pulled out. After the target battery pack 2 is partially pulled out, the locking member 57 is released. The battery pack 2, which is in normal condition above, is supported. After support is completed, the target battery pack 2 is pulled out to disassemble it. Compared with the previous method of disassembling multiple battery packs 2 one by one and then stacking multiple battery packs 2 one by one after replacement, this invention can quickly disassemble, replace or repair the damaged battery pack 2. Each joint of the liquid cooling pipe 3 and the battery pack 2 is provided with a two-way check valve to lock the coolant. Then, the joint can be pulled out to disassemble the damaged battery pack 2. After replacement, the guide rod 56 on the battery pack 2 is moved to insert the second positioning member 52 into the groove 53 of the first positioning member 51 above it. At the same time, the second positioning member 52 is moved and locked in the groove 53 below it, which can realize the quick and stable stacking and installation of the replaced battery pack 2.

[0051] Example 3

[0052] The difference between this embodiment and Embodiment 2 is that: Figure 6 As shown, the battery cabinet 1 includes a base 101, a top sealing plate 102, and a perimeter sealing plate 103 disposed between the base 101 and the top sealing plate 102. The perimeter sealing plate 103 is formed by a front sealing plate 1031, a back sealing plate 1032, and two side sealing plates 1033.

[0053] Insulation cotton 10 is provided on the inner sides of the front sealing plate 1031, the back sealing plate 1032 and the two side sealing plates 1033 respectively.

[0054] The front sealing plate 1031 is provided with an exhaust hole 11, which penetrates the front sealing plate 1031.

[0055] A lifting ring 12 is fixedly connected to the upper surface of the top sealing plate 102.

[0056] In this embodiment, the same positioning mechanism 5 is provided on the base 101 and the top sealing plate 102, which facilitates the stacking and installation of multiple battery packs 2 in the battery cabinet 1. The base 101, the top sealing plate 102, and the surrounding sealing plates 103 are made of stainless steel. Together, they can provide heat preservation, protection against solar radiation, and protection of internal pipes and cables. After the battery cabinet 1 is assembled, multiple battery packs 2 can be directly stacked and installed in the battery cabinet 1. Compared with the design, processing, production, assembly, and transportation of containers and outdoor cabinets in the prior art, the battery cabinet 1 of the present invention has a simple structure, lower processing and production costs, and is lighter in weight, making assembly and transportation more convenient. The insulation cotton 10 provided on it can be used to maintain a constant temperature inside the battery cabinet 1 and prevent dust from entering the battery cabinet 1. The exhaust hole 11 can be used for normal heat dissipation of the battery cabinet 1. The lifting ring 12 can be used to lift the battery cabinet 1. The structure and composition of the battery cabinet 1 are simple, easy to process and form, and reduce processing costs.

[0057] Example 4

[0058] The difference between this embodiment and Embodiment 3 is that: Figure 7 As shown, it also includes a bottom tray 13, on which multiple battery cabinets 1 are arranged side by side. The bottom tray 13 is also equipped with a liquid cooling unit 14, a fire cabinet 15, and an electrical cabinet 16. The liquid cooling unit 14 is used to circulate coolant in conjunction with the liquid cooling pipe 3 so that the equipment in the battery cabinet 1 is in a suitable operating temperature range. The fire cabinet 15 is used in conjunction with the fire pipe 4 to provide fire control strategy for the battery pack 2. The electrical cabinet 16 is used for power convergence, signal feedback processing, and status monitoring for each unit of the energy storage liquid cooling system.

[0059] In this embodiment, the base tray 13 is the main structure that supports the stacked liquid cooling system, including hoisting, transportation, and installation. The base tray 13 is pre-installed with main liquid cooling pipes 3 to provide coolant for cooling, and main fire-fighting pipes 4 to provide fire protection in case of thermal runaway of the battery pack 2, thus reducing on-site installation and commissioning. The liquid cooling unit 14 is installed on the base tray 13 to provide a suitable coolant temperature for the stacked energy storage system, ensuring the cells in the battery pack 2 are at their optimal operating temperature. The fire cabinet 15 is installed on the base tray 13 to provide fire control strategies for the stacked energy storage system, as well as media such as perfluorohexanone and water required for fire protection, enabling more precise and rapid fire protection in case of thermal runaway of the battery pack 2. The electrical cabinet 16 is installed on the base tray 13 to handle current convergence, signal feedback processing, status monitoring, and grid connection for each unit of the stacked energy storage system.

[0060] The stacked liquid-cooled energy storage system of the present invention, through modular design, allows for the installation of different numbers of battery cabinets 1 on the base tray 13 as needed, enabling more efficient combination of the required liquid-cooled energy storage system. Furthermore, the power capacity can be customized according to different customer needs, facilitating transportation. Simultaneously, by separately installing the liquid-cooled unit 14, the fire cabinet 15, and the electrical cabinet 16 from the battery cabinets 1 on the base tray 13, customized power capacity is facilitated, and assembly, transportation, and maintenance are more convenient. After multiple battery cabinets 1 are installed on the same base tray 13, the connection between the cabinet body and the top of the cabinet body can be locked together by the lifting ring 12 and the connecting plate, thereby improving the stability of the entire liquid-cooled energy storage system installation.

[0061] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A stacked liquid-cooled energy storage system, comprising a battery cabinet and multiple battery packs installed in the battery cabinet, characterized in that, Multiple battery packs are stacked in a row along their height direction inside the battery cabinet. At least two positioning mechanisms are spaced apart on both sides of each battery pack along its width direction. A first air passage is formed between the two positioning mechanisms and the battery cabinet. Each positioning mechanism includes a first positioning element and a second positioning element. The first positioning element is fixedly connected to or integrally formed with the shell of the battery pack. The second positioning element is located on top of the first positioning element, and a groove is provided at the bottom of the first positioning element. When adjacent battery packs are stacked, the second positioning element extends into the groove and engages with it. The battery pack is the smallest unit. A cavity is also provided on the top of the first positioning element for the second positioning element to slide and be accommodated. A guide hole is provided on the side of the first positioning element, including a vertical portion and a horizontal portion, and the guide hole communicates with the cavity. A guide rod is provided on the outer circumferential surface of the second positioning element. One end of the guide rod is fixedly connected to the second positioning element, and the other end extends out of the first positioning element through the guide hole.

2. The stacked liquid-cooled energy storage system according to claim 1, characterized in that: The top surface of the first positioning member is higher than the top surface of the battery pack, so that when two adjacent battery packs are connected by the positioning mechanism, a second air passage is formed between the two battery packs.

3. The stacked liquid-cooled energy storage system according to claim 1, characterized in that: The bottom surface of the first positioning member is lower than the bottom surface of the battery pack.

4. The stacked liquid-cooled energy storage system according to claim 1, characterized in that: When multiple battery packs are stacked and installed using multiple positioning mechanisms, the multiple positioning mechanisms are sequentially connected to form a vertical beam structure.

5. The stacked liquid-cooled energy storage system according to claim 1, characterized in that: The first positioning member is provided with a locking member, which is used to lock the first positioning member and the second positioning member when the second positioning member is inserted into the groove.

6. The stacked liquid-cooled energy storage system according to claim 1, characterized in that: It also includes two liquid cooling pipes and one fire-fighting pipe, which are installed in the first air duct. One liquid cooling pipe is used to introduce coolant into each of the liquid cooling plates of the battery pack, and the other liquid cooling pipe is used to remove heat from the coolant outlet. The fire-fighting pipe is used for thermal runaway fire protection of multiple battery packs.

7. The stacked liquid-cooled energy storage system according to claim 1, characterized in that: An energy storage high-voltage box is provided above, below, or between two adjacent battery packs to form a battery cluster, for the purpose of battery pack power management and status monitoring. A fire detector is provided on the top of the battery cabinet for fire monitoring.

8. The stacked liquid-cooled energy storage system according to claim 1, characterized in that: The battery cabinet includes a base, a top sealing plate, and a four-sided sealing plate disposed between the base and the top sealing plate. The four-sided sealing plate is formed by a front sealing plate, a back sealing plate, and two side sealing plates.

9. The stacked liquid-cooled energy storage system according to claim 8, characterized in that: A lifting ring is fixedly connected to the upper surface of the top sealing plate.

10. The stacked liquid-cooled energy storage system according to any one of claims 1 to 9, characterized in that: It also includes a base tray on which multiple battery cabinets are arranged side by side. The base tray is also equipped with a liquid cooling unit, a fire protection cabinet, and an electrical cabinet. The liquid cooling unit is used to circulate coolant in conjunction with the liquid cooling pipes to keep the equipment in the battery cabinets within a suitable operating temperature range. The fire protection cabinet is used in conjunction with the fire protection pipes to provide fire control strategies for the battery pack. The electrical cabinet is used for power convergence, signal feedback processing, and status monitoring for each unit of the energy storage liquid cooling system.

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