Energy storage device, energy storage system and charging network

Abstract

This application provides an energy storage device, an energy storage system, and a charging network. The energy storage device includes a housing, multiple battery packs, a thermal management module, a first branch pipeline, a second branch pipeline, two main pipelines, and a drain valve. The battery packs are housed within the housing and include multiple battery devices arranged along the direction of gravity. Each battery device includes a first coolant inlet and a first coolant outlet. The first branch pipeline corresponds one-to-one with each battery pack, and the coolant inlet of each battery device in the battery pack is connected to the first branch pipeline. The second branch pipeline also corresponds one-to-one with each battery pack, and the coolant outlet of each battery device in the battery pack is connected to the second branch pipeline. The first main pipeline connects the thermal management module and the multiple first branch pipelines, and the second main pipeline connects the thermal management module and the multiple second branch pipelines. A drain valve is located on at least one main pipeline. The technical solution provided by this application can improve the economic efficiency of the energy storage device.

Description

Technical Field

[0001] This application relates to the field of battery device technology, and more specifically, to an energy storage device, an energy storage system, and a charging network. Background Technology

[0002] With the rapid development of technology, electricity has become an indispensable energy source in people's production and daily life. To improve the smoothness of electricity supply and ensure the normal operation of production and daily life, energy storage devices are needed. As devices that cyclically store and release electrical energy, energy storage devices store electrical energy or supply the stored energy to electrical devices through charging or discharging. Energy storage devices are widely used in industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation, and energy storage power stations.

[0003] In the development of energy storage devices, in addition to improving their performance, how to improve their economic efficiency is also an issue that cannot be ignored. Therefore, how to improve the economic efficiency of energy storage devices is a technical problem that requires continuous improvement in energy storage technology. Summary of the Invention

[0004] This application provides an energy storage device, an energy storage system, and a charging network, which can improve the economic efficiency of the energy storage device.

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, this application provides an energy storage device, comprising a housing, multiple battery packs, a thermal management module, multiple first branch pipes, multiple second branch pipes, two main pipes, and a drain valve. The multiple battery packs are disposed within the housing, each battery pack comprising multiple battery devices arranged along the direction of gravity, and each battery device includes a first coolant inlet and a first coolant outlet. The thermal management module is used to exchange coolant with the battery devices, and includes a second coolant inlet and a second coolant outlet. Each of the multiple first branch pipes corresponds one-to-one with a battery pack, and the first coolant inlet of each battery device in a battery pack is connected to a first branch pipe. Each of the multiple second branch pipes also corresponds one-to-one with a battery pack, and the first coolant outlet of each battery device in a battery pack is connected to a second branch pipe. The two main pipes include a first main pipe and a second main pipe. The first main pipe connects to a second coolant outlet and multiple first branch pipes, and the second main pipe connects to a second coolant inlet and multiple second branch pipes. A drain valve is disposed on at least one main pipe.

[0007] The technical solution of this application embodiment, because a drain valve is installed on the main pipeline, allows the coolant in the battery device to be drained before the battery device can be removed when the battery device malfunctions. Compared to installing drain valves on each first branch pipeline and each second branch pipeline, installing the drain valve on the main pipeline reduces the number of drain valves, thus saving costs. Furthermore, the reduced number of drain valves minimizes their impact on the inner diameter of the main pipeline, thereby reducing the flow resistance of the transported coolant and lowering energy consumption, thus improving the economic efficiency of the energy storage device. In addition, the reduced number of drain valves saves internal space in the energy storage device, improving its space utilization.

[0008] In some embodiments, there are two drain valves, which are respectively installed on two main pipelines.

[0009] The technical solution of this application embodiment improves drainage efficiency by setting two drain valves on two main pipelines and draining through the two drain valves.

[0010] In some embodiments, the energy storage device further includes multiple switching valves, with both the first branch line and the second branch line equipped with switching valves.

[0011] The technical solution of this application embodiment uses a switching valve to open or close the internal passage of the pipeline. Switching valves are set in the first branch pipeline and the second branch pipeline. When draining, the first branch pipeline and the second branch pipeline corresponding to the target battery device group are opened, while the first branch pipeline and the second branch pipeline corresponding to other battery device groups are closed. This reduces the amount of coolant drained from the battery devices in other battery device groups, which helps to improve the draining efficiency, reduce the risk of coolant waste, and save costs.

[0012] In some embodiments, the main conduit is located below the battery pack in the direction of gravity.

[0013] The technical solution of this application embodiment improves drainage efficiency by placing the main pipeline below the battery pack, so that when the drain valve drains, the coolant in the battery pack flows into the main pipeline due to gravity.

[0014] In some embodiments, the housing includes a first compartment and a second compartment, with the battery pack disposed in the first compartment and the thermal management module disposed in the second compartment. A drain valve is disposed in the second compartment.

[0015] The technical solution of this application embodiment, by setting the battery device group in the first compartment and the drain valve in the second compartment, that is, isolating the drain valve and the battery device group, reduces the risk of short circuit of the battery device in the battery device group caused by the drain valve leaking coolant, which is conducive to improving the reliability of the energy storage device.

[0016] In some embodiments, the housing includes a first compartment and a second compartment, with the battery pack disposed in the first compartment and the thermal management module disposed in the second compartment. A drain valve is disposed in the first compartment and located below the battery pack.

[0017] The technical solution of this application embodiment, by setting the drain valve below the battery assembly, allows the coolant in the battery assembly to flow better into the drain valve due to gravity when the drain valve is draining, which helps to improve the draining efficiency.

[0018] In some embodiments, the inner diameter of the main pipeline is larger than the inner diameter of the first branch pipeline, and the inner diameter of the main pipeline is larger than the inner diameter of the second branch pipeline.

[0019] In the technical solution of this application embodiment, the inner diameter of the main pipeline is larger than the inner diameter of the first branch pipeline, and the inner diameter of the main pipeline is larger than the inner diameter of the second branch pipeline. By setting the drain valve in the main pipeline, the drain valve has a smaller impact on the inner diameter of the main pipeline, thereby reducing the impact of the drain valve on the flow resistance of the coolant transported in the pipe wall, reducing the risk of increasing the energy consumption of transported coolant, and improving the economy of the energy storage device. At the same time, because the inner diameter of the main pipeline is larger, the draining speed is faster, which helps to improve the draining efficiency of the drain valve.

[0020] In some embodiments, an opening is provided on the wall of the main pipeline, at least a portion of the drain valve is located outside the pipe wall, and one end of the drain valve is welded to the periphery of the opening.

[0021] The technical solution of this application embodiment reduces the influence of the drain valve on the inner diameter of the main pipeline by welding the drain valve to the main pipeline, thereby reducing the influence of the drain valve on the flow resistance in the main pipeline, reducing the risk of increasing the energy consumption of transporting coolant, and improving the economy of the energy storage device.

[0022] In some embodiments, the main pipeline includes a first pipe section, a second pipe section, and a tee pipe. The tee pipe includes a first end, a second end, and a third end that are interconnected. The first end is connected to the first pipe section, the second end is connected to the second pipe section, and the third end is connected to a drain valve.

[0023] The technical solution of this application embodiment connects the drain valve to the main pipeline through a three-way pipe, which helps to improve the convenience of drain valve installation.

[0024] In some embodiments, the energy storage device further includes a connecting pipe, one end of which is connected to a third end and the other end of which is connected to a drain valve.

[0025] The technical solution of this application embodiment connects the drain valve and the main pipeline through a connecting pipe, which can change the position of the drain valve, allowing the drain valve to be moved to a more spacious position for draining, thereby improving the convenience of draining and reducing the risk of coolant leaking into the energy storage device during draining.

[0026] In some embodiments, the drain valve is connected to the third end via a quick-release mechanism.

[0027] The technical solution of this application embodiment connects the drain valve and the main pipeline through a quick-release mechanism, which helps to improve the convenience of installing and disassembling the drain valve.

[0028] In some embodiments, the quick-release mechanism includes a first chuck, a second chuck, and a clamp. The first chuck is integrally formed with the third end, the second chuck is connected to the drain valve, and the clamp is sleeved on the first chuck and the second chuck, and the first chuck and the second chuck are connected by the clamp.

[0029] The technical solution of this application embodiment connects the drain valve and the main pipeline through a first chuck and a second chuck, which helps to improve the convenience of installing and disassembling the drain valve.

[0030] In some embodiments, the energy storage device further includes a first branch pipe and a second branch pipe, wherein the first coolant inlet is connected to the first sub-pipe through the first branch pipe, and the first coolant outlet is connected to the second sub-pipe through the second branch pipe.

[0031] The technical solution of this application embodiment connects the first branch pipe and the first coolant inlet through the first branch pipe, enabling coolant to be delivered to the battery device. Connecting the second branch pipe and the first coolant outlet through the second branch pipe allows coolant to be output from the battery device, thus improving the reliability of the heat exchange cycle of the energy storage device.

[0032] In some embodiments, the dimensions of the container are equal to those of a standard shipping container.

[0033] The technical solution of this application embodiment sets the size of the container to be equal to that of a standard container, so that the energy storage device occupies the same space as a standard container during transportation, which complies with the transportation specifications of standard containers and facilitates the transportation of energy storage devices.

[0034] In some embodiments, at least one of the dimensions of the container in the length direction, the width direction, and the height direction is not equal to the dimensions corresponding to a standard container.

[0035] The technical solution of this application embodiment improves the practicality and applicability of the energy storage device by setting at least one dimension of the container to be different from that of a standard container and changing the size of the container based on the actual use of the energy storage device.

[0036] Secondly, embodiments of this application also provide an energy storage system, which includes an energy storage converter and an energy storage device as described above, wherein the energy storage converter is used to electrically connect the power generation device and the energy storage device.

[0037] Thirdly, embodiments of this application also provide a charging network, which includes charging piles and energy storage devices as described above, wherein the energy storage devices are used to provide electrical energy to the charging piles.

[0038] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 A schematic diagram of a charging network provided for some embodiments of this application;

[0041] Figure 2 Schematic diagram of an energy storage system provided for some embodiments of this application;

[0042] Figure 3 This is a schematic diagram of the internal structure of an energy storage device provided in some embodiments of this application;

[0043] Figure 4 This is an internal schematic diagram of an energy storage device provided in some embodiments of this application;

[0044] Figure 5 Internal schematic diagram of an energy storage device provided in other embodiments of this application;

[0045] Figure 6 This is a schematic diagram showing the connection between the main pipeline and the drain valve provided in some embodiments of this application;

[0046] Figure 7 A schematic diagram showing the connection between the main pipeline and the drain valve for some embodiments of this application;

[0047] Figure 8 Schematic diagram of the connection between the main pipeline and the drain valve provided for other embodiments of this application;

[0048] Figure 9 This is a schematic diagram of the connection between the main pipeline and the drain valve provided in some embodiments of this application.

[0049] Icons: 1-Energy storage device; 10-Box; 11-First compartment; 12-Second compartment; 13-Panel; 14-Separator; 20-Battery assembly; 21-Battery assembly; 211-First coolant inlet; 212-First coolant outlet; 30-Thermal management module; 31-Second coolant outlet; 32-Second coolant inlet; 40-First branch pipe; 41-Second branch pipe; 42-First branch pipe; 43-Second branch pipe; 50-Main pipe; 51-Opening; 52-First pipe Section; 53-Second pipe section; 54-Tee pipe; 541-First end; 542-Second end; 543-Third end; 55-First main pipeline; 56-Second main pipeline; 60-Drain valve; 70-Switch valve; 80-Connecting pipe; 90-Quick release mechanism; 91-First chuck; 92-Second chuck; 93-Clamp; 100-Charging network; 110-Charging pile; 200-Energy storage system; 210-Power conversion device; 220-Power generation device; X-Horizontal direction; Y-Gravity direction. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0052] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0055] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0056] The battery device mentioned in the embodiments of this application may include a single physical module containing one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed via a busbar.

[0057] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0058] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0059] Optionally, the electrode assembly has a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0060] Optionally, the electrode assembly has a stacked structure.

[0061] Optionally, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0062] In some embodiments, the battery device may be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0063] In some embodiments, the battery device may be a battery pack, which includes a housing and individual battery cells, wherein the individual battery cells or battery modules are housed in the housing.

[0064] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0065] Typically, an energy storage device includes a thermal management module, two main pipelines, a first branch pipeline, and a second branch pipeline. The main pipelines connect to the thermal management module. The first branch pipeline connects to one main pipeline and the first coolant inlet of the battery unit. The second branch pipeline connects to the other main pipeline and the first coolant outlet of the battery unit. The thermal management module supplies coolant to the battery unit through the first coolant inlet via the main pipeline and the first branch pipeline. The coolant exchanges heat with the battery unit, thereby regulating its temperature. After heat exchange, the coolant is returned to the thermal management module via the first coolant outlet, the second branch pipeline, and the other main pipeline, thus achieving coolant circulation.

[0066] Typically, there are multiple battery units in an energy storage device, and correspondingly, there are also multiple first and second branch pipes. Both the first and second branch pipes are equipped with drain valves. When a battery unit malfunctions and needs to be repaired or replaced, the coolant in the malfunctioning battery unit needs to be drained before the malfunctioning battery unit is removed from the energy storage device. This reduces the risk of coolant leakage in the energy storage device causing a short circuit.

[0067] However, due to the large number of first and second branch pipes, a greater number of drain valves are required, increasing the cost of these valves. Furthermore, the drain valves, located within the pipes, reduce the pipe's inner diameter, increasing the flow resistance of the coolant and consequently increasing the energy consumption required for the thermal management module to transport coolant. This further increases the cost of coolant transport and negatively impacts the economics of the energy storage device.

[0068] In view of this, to address the problem of a large number of drain valves in energy storage devices leading to poor economic efficiency, this application proposes an energy storage device. The energy storage device includes a housing, multiple battery packs, a thermal management module, multiple first branch pipes, multiple second branch pipes, two main pipes, and drain valves. Multiple battery packs are housed within the housing, each battery pack comprising multiple battery devices arranged along the direction of gravity. Each battery device includes a first coolant inlet and a first coolant outlet. The thermal management module exchanges coolant with the battery devices and includes a second coolant inlet and a second coolant outlet. Each of the multiple first branch pipes corresponds one-to-one with a battery pack, with the first coolant inlet of each battery device in the battery pack connected to a first branch pipe. Each of the multiple second branch pipes also corresponds one-to-one with a battery pack, with the first coolant outlet of each battery device in each battery pack connected to a second branch pipe. The two main pipes include a first main pipe and a second main pipe. The first main pipe connects to the second coolant outlet and multiple first branch pipes, and the second main pipe connects to the second coolant inlet and multiple second branch pipes. A drain valve is installed on at least one main pipeline for draining coolant.

[0069] Because a drain valve is installed on the main pipeline, when the battery unit of the energy storage device malfunctions, the coolant in the battery unit can be drained through the drain valve before the battery unit can be removed. Compared to installing drain valves on each first and second branch pipeline, installing the drain valve on the main pipeline for draining reduces the number of drain valves, thus saving costs. Furthermore, the fewer drain valves required reduce their impact on the inner diameter of the main pipeline, thereby reducing the flow resistance of the transported coolant and lowering energy consumption, which improves the economics of the energy storage device. In addition, the fewer drain valves required save internal space in the energy storage device, improving its space utilization rate.

[0070] The energy storage devices disclosed in this application can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage power stations can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. Wind power generation systems collect wind energy from wind turbines, convert it into electrical energy, and store it in the energy storage device. Solar power generation systems can convert solar energy into electrical energy, store it in the energy storage device, and supply it to users as needed. Mobile power systems can supply power to relevant electrical equipment in areas where the mains power supply cannot reach, such as remote mountainous areas and remote wilderness areas. Temporary power supply systems can supply power to users when power supply is insufficient. The energy storage system provided in this application can be any power system that requires energy storage devices.

[0071] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a charging network provided in some embodiments of this application. Embodiments of this application provide a charging network 100, which includes a charging pile 110 for charging electrical equipment. The charging network 100 may also include an energy storage device 1, which is electrically connected to the charging pile 110 and provides electrical energy to the charging pile 110.

[0072] It should be noted that the charging pile 110 is electrically connected to the battery cells in the energy storage device 1 via cables, and the battery cells can supply the charging pile 110 with their stored electrical energy. The charging pile 110 has a connector that can be connected to electrical equipment, thereby replenishing the equipment's energy. The application of the energy storage device 1 in this charging network 100 can effectively improve the safety of the charging network 100 and also help to improve the flexibility of the charging network 100 during deployment.

[0073] In a charging network 100, there can be one charging pile 110, and the energy storage device 1 provides power to the charging pile 110; there can also be multiple charging piles 110, and the energy storage device 1 provides power to multiple charging piles 110.

[0074] The energy storage device 1 may include a housing 10 and a battery device 21, which is electrically connected to the charging pile 110 so that the battery device 21 can provide power to the charging pile 110.

[0075] As an example, such as Figure 1 As shown, the charging network 100 includes an energy storage device 1 and two charging piles 110, with the energy storage device 1 providing power to the two charging piles 110.

[0076] Please refer to Figure 2 , Figure 2 This is a schematic diagram of an energy storage system provided in some embodiments of this application. Embodiments of this application provide an energy storage system 200. The energy storage system 200 includes a power conversion device 210, which is electrically connected to a power generation device 220 to convert the electrical power provided by the power generation device 220. The energy storage system 200 may also include an energy storage device 1, which is electrically connected to the power conversion device 210. The power conversion device 210 converts the electrical energy provided by the power generation device 220 and stores it in the energy storage device 1.

[0077] A power conversion device 210 is used to connect between the power generation device 220 and the energy storage device 1. The power generation device 220 generates electrical energy and stores the generated electrical energy in the energy storage device 1 via the power conversion device 210. The use of the energy storage device 1 in the energy storage system 200 can effectively improve the operational safety of the energy storage system 200. In specific implementations, the power generation device 220 can be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, etc. This application does not limit the specific type of the power generation device 220.

[0078] As an example, such as Figure 2 As shown, the energy storage system 200 includes an energy storage device 1 and a power conversion device 210. Two power generation devices 220 respectively transmit the generated electrical energy to the power conversion device 210, and the power conversion device 210 introduces the electrical energy into the energy storage device 1 for storage.

[0079] Please refer to Figures 3 to 5 , Figure 3 This is a schematic diagram of the internal structure of an energy storage device provided in some embodiments of this application. Figure 4 This is a schematic diagram of the internal structure of an energy storage device provided in some embodiments of this application. Figure 5 This is an internal schematic diagram of an energy storage device provided for other embodiments of this application. Figure 3 The battery packs are concealed within. This application provides an energy storage device 1, which includes a housing 10, multiple battery packs 20, a thermal management module 30, multiple first branch pipes 40, multiple second branch pipes 41, two main pipes 50, and a drain valve 60. The multiple battery packs 20 are disposed within the housing 10. Each battery pack 20 includes multiple battery devices 21 arranged along the gravitational direction Y. Each battery device includes a first coolant inlet 211 and a first coolant outlet 212. The thermal management module 30 is used to exchange coolant with the battery devices 21. The thermal management module 30 includes a second coolant inlet 32 ​​and a second coolant outlet 31. Each of the multiple first branch pipes 40 corresponds one-to-one with each of the multiple battery packs 20. The first coolant inlet 211 of each battery device 21 in the battery pack 20 is connected to the first branch pipe 40. Multiple second branch pipes 41 correspond one-to-one with multiple battery device groups 20. The first coolant outlet 212 of the battery device 21 in the battery device group 20 is connected to the second branch pipe 41. Two main pipes 50 include a first main pipe 55 and a second main pipe 56. The first main pipe 55 connects the second coolant outlet 31 and multiple first branch pipes 40, and the second main pipe 56 connects the second coolant inlet 32 ​​and multiple second branch pipes 41. A drain valve 60 is provided on at least one main pipe 50 for draining coolant.

[0080] In some embodiments, the energy storage device 1 includes a housing 10, which can be a standard shipping container or other metal housing 10.

[0081] In some embodiments, the housing 10 may be made of stainless steel, alloy, or the like.

[0082] In some embodiments, the battery device group 20 can be a group of battery devices 21 connected in series or in parallel. The multiple battery devices 21 can be arranged along the gravitational direction Y. A current-collecting component can be provided at the bottom of the multiple battery devices 21 to collect the current of the multiple battery devices 21 and then output it.

[0083] In some embodiments, the battery pack 20 may also be formed by connecting multiple battery cells in series or in parallel.

[0084] In some embodiments, a battery pack 20 may be packaged and then placed inside the housing 10, or a battery pack 20 may be directly placed inside the housing 10 by connecting it directly to the battery device 21.

[0085] In some embodiments, the number of battery device groups 20 can be multiple, and the multiple battery device groups 20 can be arranged along the horizontal direction X. The multiple battery device groups 20 can be connected in series or in parallel.

[0086] In some embodiments, the horizontal direction X can be represented by the direction indicated by the letter X in the figure, and the gravitational direction Y can be represented by the direction indicated by the letter Y in the figure.

[0087] In some embodiments, the horizontal direction X can be parallel to the length or width direction of the box 10, and the gravity direction Y can be parallel to the height direction of the box 10.

[0088] In some embodiments, the number of battery device groups 20 can be multiple, such as two, three, four, etc.

[0089] In some embodiments, the number of battery devices 21 in the battery device group 20 can be multiple, such as two, three, four, etc.

[0090] In some embodiments, the number of battery packs 20 may be four.

[0091] In some embodiments, the number of battery devices 21 in a battery device group 20 may be eight.

[0092] In some embodiments, the battery device 21 may have a first coolant inlet 211 and a first coolant outlet 212. The coolant enters the cooling channel of the battery device 21 from the first coolant inlet 211, exchanges heat with the battery cells in the battery device 21, and then flows out from the first coolant outlet 212.

[0093] In some embodiments, coolant may be used to cool the battery device 21.

[0094] In some embodiments, the thermal management module 30 may be disposed within the housing 10.

[0095] In some embodiments, the thermal management module 30 may include a pumping device for delivering coolant, and the thermal management module 30 provides power for the delivery of coolant.

[0096] In some embodiments, the thermal management module 30 may store coolant to deliver the coolant stored in the thermal management component to the battery device 21, and store the coolant output by the battery device 21 during heat exchange cycles.

[0097] In some embodiments, the energy storage device 1 may include a first branch line 40, a second branch line 41, and a main line 50.

[0098] The number of main pipes 50 can be two. The main pipes 50 can include a first main pipe 55 and a second main pipe 56. The first main pipe 55 is connected to the second coolant outlet 31 and the first branch pipe 40 of the thermal management module 30, and the second main pipe 56 is connected to the second coolant inlet 32 ​​and the second branch pipe 41 of the thermal management module.

[0099] In some embodiments, when the thermal management module 30 outputs coolant, the coolant flows through the second coolant outlet 31, the first main pipe 55, and the first branch pipe 40, and then exchanges heat with the battery device 21 through the first coolant inlet 211 of the battery device 21 via the first branch pipe 40.

[0100] In some embodiments, during coolant return, the coolant after heat exchange in the battery device 21 flows out through the first coolant outlet 212 of the battery device 21, flows through the second branch pipe 41 to the second main pipe 56, and returns to the thermal management module 30 through the second coolant inlet 32.

[0101] In some embodiments, there are two main pipes 50, that is, the main pipes 50 are the first-stage pipes for coolant circulation.

[0102] In some embodiments, there are multiple first branch lines 40, and the number of first branch lines 40 is the same as the number of battery device groups 20, with one battery device group 20 corresponding to one first branch line 40.

[0103] In some embodiments, there are multiple second branch lines 41, and the number of second branch lines 41 is the same as the number of battery device groups 20, with one battery device group 20 corresponding to one second branch line 41.

[0104] In some embodiments, the first branch pipe 40 and the second branch pipe 41 are secondary pipes for coolant circulation.

[0105] In some embodiments, the energy storage device 1 further includes a drain valve 60. The drain valve 60 is used to drain coolant from the pipelines and the battery device 21.

[0106] For example, when one of the battery devices 21 in the energy storage device 1 needs maintenance or repair, the battery device 21 needs to be removed from the energy storage device 1. Since the faulty battery device 21 contains coolant, and the pipeline connected to the faulty battery device 21 also contains coolant, directly removing the faulty battery device 21 will cause coolant leakage, thereby posing a risk of short circuit to other battery devices 21 in the energy storage device 1, or short circuit to electrical components in the energy storage device 1.

[0107] At this time, the coolant is discharged through the drain valve 60 to reduce the risk of short circuit in the energy storage device 1.

[0108] In some embodiments, the number of drain valves 60 can be one, and one drain valve 60 can be provided in the first main pipeline 55.

[0109] In some embodiments, the number of drain valves 60 can be one, and one drain valve 60 can be provided in the second main pipeline 56.

[0110] In some embodiments, the number of drain valves 60 can be two, with one drain valve 60 located in the first main pipeline 55 and the other drain valve 60 located in the second main pipeline 56.

[0111] In some embodiments, the number of drain valves 60 can be multiple, and multiple drain valves 60 can be provided in the same main pipeline 50.

[0112] In some embodiments, the number of drain valves 60 can be multiple, and some of the multiple drain valves 60 can be set in the first main pipeline 55, and other parts can be set in the second main pipeline 56.

[0113] It should be noted that in one part of the multiple drain valves 60 and another part of the multiple drain valves 60, the number of drain valves 60 can be multiple or one.

[0114] In this embodiment of the technical solution, since a drain valve 60 is provided on the main pipeline 50, when the battery device 21 of the energy storage device 1 malfunctions, the coolant in the battery device 21 can be drained through the drain valve 60 before the battery device 21 can be removed. Compared to providing drain valves 60 on each first branch pipeline 40 and each second branch pipeline 41, providing drain valves 60 on the main pipeline 50 for draining reduces the number of drain valves 60, which is beneficial for cost savings. Simultaneously, since the number of drain valves 60 is smaller, the impact of the drain valves 60 on the inner diameter of the main pipeline 50 is reduced, thereby reducing the flow resistance of the transported coolant, reducing the energy consumption of transported coolant, and improving the economic efficiency of the energy storage device 1. Furthermore, since the number of drain valves 60 is smaller, the internal space of the energy storage device 1 is saved, which is beneficial for improving the space utilization rate of the energy storage device 1.

[0115] Please refer to Figures 3 to 5 In some embodiments, there are two drain valves 60, which are respectively installed in two main pipelines 50.

[0116] In some embodiments, the number of drain valves 60 can be two, with one drain valve 60 disposed on the first main pipeline 55 and the other drain valve 60 disposed on the second main pipeline 56.

[0117] In some embodiments, both drain valves 60 may be opened to drain the coolant from the two main pipes 50, the faulty battery device 21, and the first branch pipe 40 and the second branch pipe 41 corresponding to the faulty battery device 21.

[0118] In some embodiments, one of the two drain valves 60 can be used for draining coolant, while the other drain valve 60 can inject gas into the main pipeline 50 to use the gas pressure to squeeze out the coolant, thus facilitating the draining of coolant by one drain valve 60.

[0119] The technical solution of this application embodiment improves drainage efficiency by setting two drain valves 60 on two main pipelines 50 respectively and draining through the two drain valves 60.

[0120] Please refer to Figures 3 to 5 In some embodiments, the energy storage device 1 further includes multiple switching valves 70, and both the first branch line 40 and the second branch line 41 are provided with switching valves 70.

[0121] In some embodiments, the energy storage device 1 may include a plurality of switching valves 70, the number of which may be the sum of the number of first branch lines 40 and the number of second branch lines 41.

[0122] In some embodiments, each first branch line 40 may be provided with a switching valve 70, and each second branch line 41 may be provided with a switching valve 70.

[0123] In some embodiments, the switching valve 70 can control the opening and closing of the flow path in the first branch pipe 40.

[0124] In some embodiments, the switching valve 70 can control the opening and closing of the flow path in the second branch pipe 41.

[0125] In some embodiments, when the battery device 21 fails, the switching valve 70 of the first branch line 40 corresponding to the failed battery device 21 is opened, the switching valve 70 of the second branch line 41 corresponding to the failed battery device 21 is opened, and the switching valves 70 of other first branch lines 40 and other second branch lines 41 are closed.

[0126] Open the drain valve 60 so that the drain valve 60 can drain the coolant in the main pipe 50, drain the coolant in the first branch pipe 40 corresponding to the faulty battery device 21, drain the coolant in the second branch pipe 41 corresponding to the faulty battery device 21, and drain the coolant in the faulty battery device 21.

[0127] It should be noted that since the switching valves 70 of the other first branch pipe 40 and the other second branch pipe 41 are all closed, the drain valve 60 will not affect the coolant in the other first branch pipe 40 and the other second branch pipe 41 when it drains.

[0128] Furthermore, although the drain valve 60 discharges coolant from the main pipe 50, the cost of the discharged coolant is negligible compared to the savings in the cost of the drain valve 60 and the reduction in heat exchange cycle energy consumption, due to the low cost of coolant.

[0129] In the technical solution of this application embodiment, the switching valve 70 is used to open or block the internal passage of the pipeline. The switching valve 70 is set in the first branch pipeline 40 and the second branch pipeline 41. When draining, the first branch pipeline 40 and the second branch pipeline 41 corresponding to the target battery device group 20 are opened, and the first branch pipeline 40 and the second branch pipeline 41 corresponding to other battery device groups 20 are blocked. This reduces the amount of coolant drained from the battery devices 21 in other battery device groups 20, which helps to improve the draining efficiency, reduce the risk of coolant waste, and save costs.

[0130] Please refer to Figures 3 to 5 In some embodiments, the main conduit 50 is located below the battery pack 20 in the gravitational direction Y.

[0131] In some embodiments, the energy storage device 1 may include a tray 13, with multiple battery packs 20 located above the tray 13 in the gravitational direction Y, the tray 13 supporting the multiple battery packs 20, and a main pipeline 50 located below the tray 13.

[0132] In some embodiments, when the faulty battery device 21 needs to be removed, the thermal management module 30 is first stopped from operating, and the power to deliver coolant is no longer provided. At this time, due to gravity, the coolant flows to the main pipe 50 located below, so that the coolant flows into the main pipe 50.

[0133] The drain valve 60 is installed on the main pipeline 50 to facilitate the draining of liquid.

[0134] The technical solution of this application embodiment is to set the main pipeline 50 below the battery device group 20, so that when the drain valve 60 drains, the coolant in the battery device 21 flows into the main pipeline 50 due to gravity, which helps to improve the draining efficiency.

[0135] Please refer to Figure 3 and Figure 4 In some embodiments, the housing 10 includes a first compartment 11 and a second compartment 12, with the battery assembly 20 disposed in the first compartment 11 and the thermal management module 30 disposed in the second compartment 12. A drain valve 60 is disposed in the second compartment 12.

[0136] In some embodiments, the housing 10 may include a first compartment 11 and a second compartment 12, wherein the first compartment 11 and the second compartment 12 may be separated by a partition 14, and the partition 14 may be installed inside the housing 10 by means of bolts or welding.

[0137] In some embodiments, the battery pack 20 may be disposed in the first compartment 11, which is the battery compartment that houses the battery pack 21.

[0138] In some embodiments, the thermal management module 30 may be located in the second compartment 12, which is also the unit compartment.

[0139] In some embodiments, in order to reduce the impact of the thermal management module 30 and other components on the battery pack 20, the first compartment 11 and the second compartment 12 are typically isolated from each other.

[0140] In some embodiments, the main conduit 50 is connected to the thermal management module 30. The first branch conduit 40 and the second branch conduit 41 are both connected to the main conduit 50 and the battery assembly 20. A portion of the main conduit 50 may be located in the first compartment 11, and another portion may be located in the second compartment 12. Both the first branch conduit 40 and the second branch conduit 41 may be located in the first compartment 11.

[0141] In some embodiments, the drain valve 60 may be provided in the second compartment 12, and the drain valve 60 may be provided on the main pipeline 50 located in the second compartment 12.

[0142] It is understandable that there may be a risk of coolant leakage during the draining process of the drain valve 60, or that the drain valve 60 is located on the main pipeline 50, and there is a risk of coolant leakage at its connection point. In order to reduce the risk of coolant leakage causing a short circuit in the battery pack 20, the drain valve 60 is located in the second compartment 12.

[0143] The technical solution of this application embodiment, by setting the battery device group 20 in the first compartment 11 and the drain valve 60 in the second compartment 12, isolates the drain valve 60 from the battery device group 20, reduces the risk of short circuit of the battery device 21 in the battery device group 20 due to coolant leakage from the drain valve 60, and helps to improve the reliability of the energy storage device 1.

[0144] Please refer to Figure 3 and Figure 5 In some embodiments, the housing 10 includes a first compartment 11 and a second compartment 12, with the battery assembly 20 disposed in the first compartment 11 and the thermal management module 30 disposed in the second compartment 12. A drain valve 60 is disposed in the first compartment 11 and located below the battery assembly 20.

[0145] In some embodiments, the main conduit 50 is connected to the thermal management module 30. The first branch conduit 40 and the second branch conduit 41 are both connected to the main conduit 50 and the battery assembly 20. A portion of the main conduit 50 may be located in the first compartment 11, and another portion may be located in the second compartment 12. Both the first branch conduit 40 and the second branch conduit 41 may be located in the first compartment 11.

[0146] In some embodiments, the drain valve 60 may be provided in the second compartment 12, or the drain valve 60 may be provided on the main pipeline 50 located in the first compartment 11.

[0147] It is understandable that, in order to facilitate the maintenance and repair of the battery unit 21, a door is usually provided in the space where the battery unit group 20 is located, that is, the first compartment 11 is provided with a door.

[0148] To facilitate drainage via the drain valve 60, the drain valve 60 can be installed in the first compartment 11.

[0149] It should be noted that the first compartment 11 and the second compartment 12 can be separated by a partition 14, which is installed inside the housing 10 by welding or bolting. When it is necessary to repair the components of the second compartment 12, the partition 14 needs to be removed, which is time-consuming and labor-intensive.

[0150] In some embodiments, a portion of the main conduit 50 may be located in the first compartment 11 and below the tray 13. A portion of the first branch conduit 40 and a portion of the second branch conduit 41 may be located above the tray 13 to connect to the battery assembly 20 located above the tray 13. Another portion of the first branch conduit 40 and another portion of the second branch conduit 41 may be located below the tray 13 to connect to the main conduit 50 located below the tray 13.

[0151] In some embodiments, in order to make the battery devices 21 in the battery device group 20 more compact, so as to facilitate the parallel or series connection of the battery devices 21 in the battery device group 20, the space utilization rate of the space above the tray 13 in the first compartment 11 is higher. That is, it is more difficult to install the drain valve 60 in the remaining space, and it is also more difficult to operate the drain valve 60 to drain after it is installed.

[0152] Therefore, the drain valve 60 is located below the battery assembly 20. The drain valve 60 is located in the main pipeline 50 located below the tray 13.

[0153] Similar to the main pipe 50 being located below the battery pack 20, in some embodiments, when a faulty battery pack 21 needs to be removed, the thermal management module 30 will first stop operating, ceasing to provide power for the delivery of coolant. At this time, due to gravity, the coolant flows towards the drain valve 60 located below, causing the coolant to converge in the main pipe 50, facilitating drainage through the drain valve 60.

[0154] In some embodiments, it should be noted that the drain valve 60 is located below the battery assembly 20, that is, the drain valve 60 and the main pipeline 50 can be located below the battery assembly 20, and the drain valve 60 and the main pipeline 50 can be located below the first branch pipeline 40 and the second branch pipeline 41.

[0155] The technical solution of this application embodiment is to place the drain valve 60 below the battery device group 20, so that when the drain valve 60 drains, the coolant in the battery device 21 can flow into the drain valve 60 better due to gravity, which is beneficial to improving the draining efficiency.

[0156] In some embodiments, the inner diameter of the main pipe 50 is larger than the inner diameter of the first branch pipe 40, and the inner diameter of the main pipe 50 is larger than the inner diameter of the second branch pipe 41.

[0157] In some embodiments, the main pipe 50 is a primary pipe, and the first branch pipe 40 and the second branch pipe 41 are secondary pipes.

[0158] In some embodiments, when the thermal management module 30 delivers coolant, the coolant is delivered to the first main pipe 55, and a plurality of first branch pipes 40 are connected to the first main pipe 55 to divert the coolant in the first main pipe 55.

[0159] In some embodiments, when the battery device 21 outputs coolant, the coolant is delivered to a plurality of second branch pipes 41, and the coolant in the second branch pipes 41 merges in the second main pipe 56.

[0160] The flow rate in the first main pipe 55 can be equal to the flow rate in multiple first branch pipes 40, meaning the flow rate in the first main pipe 55 is greater than the flow rate in any one of the first branch pipes 40. To meet the flow demand, the inner diameter of the first main pipe 55 is larger than the inner diameter of the first branch pipes 40.

[0161] The flow rate in the second main pipe 56 can be equal to the flow rate in multiple second branch pipes 41, meaning the flow rate in the second main pipe 56 is greater than the flow rate in one of the second branch pipes 41. To meet the flow demand, the inner diameter of the second main pipe 56 is larger than the inner diameter of the second branch pipes 41.

[0162] In some embodiments, the inner diameters of the first main pipe 55 and the second main pipe 56 may be equal, and the inner diameters of the first branch pipe 40 and the second branch pipe 41 may be equal.

[0163] Typically, after setting the drain valve 60, the inner diameter of the pipeline will be reduced. Since the inner diameter of the main pipeline 50 is relatively large, the reduction is small and has little impact on the flow resistance in the main pipeline 50.

[0164] In addition, since the space under the tray 13 is relatively large, when installing the drain valve 60, the inner diameter of the main pipeline 50 can be appropriately increased before installing the drain valve 60.

[0165] In the technical solution of this application embodiment, the inner diameter of the main pipe 50 is larger than the inner diameter of the first branch pipe 40, and the inner diameter of the main pipe 50 is larger than the inner diameter of the second branch pipe 41. By setting the drain valve 60 in the main pipe 50, the drain valve 60 has a smaller impact on the inner diameter of the main pipe 50, thereby reducing the impact of the drain valve 60 on the flow resistance of the coolant transported in the pipe wall, reducing the risk of increasing the energy consumption of the transported coolant, and improving the economy of the energy storage device 1. At the same time, because the inner diameter of the main pipe 50 is larger, the draining speed is faster, which helps to improve the draining efficiency of the drain valve 60.

[0166] Please refer to Figures 3 to 5 and refer to Figure 6 , Figure 6This is a schematic diagram of the connection between a main pipeline and a drain valve provided in some embodiments of this application. In some embodiments, an opening 51 is provided on the wall of the main pipeline 50, at least a portion of the drain valve 60 is located outside the pipe wall, and one end of the drain valve 60 is welded to the periphery of the opening 51.

[0167] In some embodiments, the main conduit 50 may be made of metal, such as iron, aluminum, stainless steel, alloy, etc.

[0168] In some embodiments, the main pipe 50 may be manufactured by casting.

[0169] In some embodiments, the opening 51 can be connected to the flow channel of the main pipe 50. The opening 51 can be integrally formed with the main pipe 50 or formed by machining, such as milling.

[0170] In some embodiments, the drain valve 60 may also be made of metal, such as iron, aluminum, stainless steel, alloy, etc.

[0171] In some embodiments, the drain valve 60 and the main pipeline 50 can be connected by welding. One end of the drain valve 60 is welded to the periphery of the opening 51, so that the drain valve 60 is in communication with the flow channel of the main pipeline 50.

[0172] In this case, the drain valve 60 can be welded to one end of the opening 51 without extending beyond the inner wall of the pipe, thus not affecting the inner diameter of the main pipe 50. Alternatively, the drain valve 60 can be welded to one end of the opening 51 with a small extension beyond the inner wall of the pipe, thus having a smaller impact on the inner diameter of the main pipe 50.

[0173] The technical solution of this application embodiment reduces the influence of the drain valve 60 on the inner diameter of the main pipeline 50 by welding the drain valve 60 to the main pipeline 50, thereby reducing the influence of the drain valve 60 on the flow resistance in the main pipeline 50, reducing the risk of increasing the energy consumption of transporting coolant, and improving the economy of the energy storage device 1.

[0174] Please refer to Figures 3 to 5 and refer to Figures 7 to 9 , Figure 7 This is a schematic diagram showing the connection between the main pipeline and the drain valve in some embodiments of this application. Figure 8 This is a schematic diagram showing the connection between the main pipeline and the drain valve in some other embodiments of this application. Figure 9 This is a schematic diagram of the connection between the main pipeline and the drain valve provided in some embodiments of this application. In some embodiments, the main pipeline 50 includes a first pipe section 52, a second pipe section 53, and a tee pipe 54. The tee pipe 54 includes a first end 541, a second end 542, and a third end 543 that are interconnected. The first end 541 is connected to the first pipe section 52, the second end 542 is connected to the second pipe section 53, and the third end 543 is connected to the drain valve 60.

[0175] In some embodiments, the tee 54 may include a first end 541, a second end 542, and a third end 543 that are interconnected.

[0176] In some embodiments, the first end 541 may be sleeved on the outer peripheral wall of the first pipe segment 52, and the second end 542 may be sleeved on the outer peripheral wall of the second pipe segment 53.

[0177] Alternatively, in some embodiments, the first pipe segment 52 may be sleeved on the outer peripheral wall of the first end 541, and the second pipe segment 53 may be sleeved on the outer peripheral wall of the second end 542.

[0178] In some embodiments, the third end 543 may be connected to the drain valve 60, so that the drain valve 60 is connected to the main pipeline 50.

[0179] The technical solution of this application embodiment connects the drain valve 60 to the main pipeline 50 via a three-way pipe 54, thereby improving the ease of installation of the drain valve 60.

[0180] Please refer to Figure 7 and Figure 8 In some embodiments, the energy storage device 1 further includes a connecting pipe 80, one end of which is connected to a third end 543, and the other end is connected to a drain valve 60.

[0181] In some embodiments, the main pipe 50 may be made of PE (Polyethylene). The drain valve 60 may also be made of PE, and the connecting pipe 80 may also be made of PE.

[0182] Alternatively, the main pipe 50 can be made of metal, the drain valve 60 can also be made of metal, and the connecting pipe 80 can also be made of metal.

[0183] Alternatively, one or both of the following materials may be metal: the main pipe 50, the drain valve 60, and the connecting pipe 80; and the other materials may be PE.

[0184] In some embodiments, the connecting pipe 80 may be made of PE, which has good deformation capacity, allowing the connecting pipe 80 to be bent, thus improving the convenience of drainage.

[0185] In some embodiments, the length of the connecting pipe 80 is not limited, and different sizes of connecting pipe 80 can be replaced based on the drainage requirements, so that the drainage valve 60 can be extended outside the energy storage device 1 when draining.

[0186] Please refer to Figure 7In some embodiments, the connection between the connecting pipe 80 and the third end 543 can be an interference fit. The connection between the connecting pipe 80 and the drain valve 60 can also be an interference fit.

[0187] Please refer to Figure 8 In some embodiments, the connecting pipe 80 and the third end 543 can be connected via a quick-connect fitting. To improve the reliability of the connection, the quick-connect fitting can be made of metal. Specifically, the quick-connect fitting involves providing a male connector at the third end 543 and a female connector at the connecting pipe 80. Similarly, the connecting pipe 80 and the drain valve 60 can also be connected via a quick-connect fitting.

[0188] The technical solution of this application embodiment connects the drain valve 60 and the main pipeline 50 through the connecting pipe 80, which can change the position of the drain valve 60, so that the drain valve 60 can be moved to a more spacious position for draining, which helps to improve the convenience of draining and reduce the risk of coolant leaking into the energy storage device 1 during draining.

[0189] Please refer to Figures 3 to 5 and refer to Figure 9 In some embodiments, the drain valve 60 is connected to the third end 543 via a quick-release mechanism 90.

[0190] In some embodiments, the drain valve 60 can be connected to the third end 543 via a quick-release mechanism 90. The quick-release mechanism 90 can be a mounting base and a mounting plug. One of the third end 543 and the drain valve 60 is provided with a mounting base, and the other is provided with a mounting plug. The mounting plug is detachably connected to the mounting base, thereby enabling quick installation and quick removal of the drain valve 60 and the third end 543.

[0191] The technical solution of this application embodiment connects the drain valve 60 and the main pipeline 50 through the quick-release mechanism 90, which helps to improve the convenience of installing and disassembling the drain valve 60.

[0192] Please refer to Figure 9 In some embodiments, the quick-release mechanism 90 includes a first chuck 91, a second chuck 92, and a clamp 93. The first chuck 91 is integrally formed with the third end 543, the second chuck 92 is connected to the drain valve 60, and the clamp 93 is sleeved on the first chuck 91 and the second chuck 92. The first chuck 91 and the second chuck 92 are connected by the clamp 93.

[0193] In some embodiments, the quick-release mechanism 90 may include a first chuck 91 and a second chuck 92. The first chuck 91 and the second chuck 92 may be made of metal, and the drain valve 60 may also be made of metal. The drain valve 60 and the second chuck 92 may be welded together.

[0194] In some embodiments, the main pipe 50 may be made of PE, and the first chuck 91 may be integrally molded with the third end 543 by insert injection molding.

[0195] In some embodiments, when the drain valve 60 is connected to the third end 543, the first chuck 91 and the second chuck 92 are connected, and the clamp 93 is fitted onto the connection between the first chuck 91 and the second chuck 92. To improve sealing, a sealing ring can be provided at the connection between the first chuck 91 and the second chuck 92. The sealing ring is fitted onto the connection between the first chuck 91 and the second chuck 92, and the clamp 93 locks the first chuck 91 and the second chuck 92 together.

[0196] When it is necessary to separate the drain valve 60 and the main pipeline 50, the clamp 93 is opened, thereby separating the first chuck 91 and the second chuck 92.

[0197] The technical solution of this application embodiment connects the drain valve 60 and the main pipeline 50 through the first chuck 91 and the second chuck 92, which helps to improve the convenience of installing and disassembling the drain valve 60.

[0198] Please refer to Figures 3 to 5 In some embodiments, the energy storage device 1 further includes a first branch pipe 42 and a second branch pipe 43, wherein the first coolant inlet 211 is connected to the first branch pipe 40 through the first branch pipe 42, and the first coolant outlet 212 is connected to the second branch pipe 41 through the second branch pipe 43.

[0199] In some embodiments, there may be multiple first branch pipes 42, and multiple first branch pipes 42 are connected to the first branch pipe 40.

[0200] In some embodiments, there may be multiple second branch pipes 43, and multiple second branch pipes 43 are connected to the second branch pipe 41.

[0201] One battery pack 20 may correspond to one first branch pipe 40 and one second branch pipe 41. One battery pack 20 may include multiple battery devices 21, and each battery device 21 of the battery pack 20 is connected to one first branch pipe 42 and one second branch pipe 43. The first branch pipe 42 is connected to the first coolant inlet 211 of the battery device 21, and the second branch pipe 43 is connected to the first coolant outlet 212 of the battery device 21.

[0202] In some embodiments, the thermal management module 30 delivers coolant to the first main pipeline 55. The coolant flows into the first coolant inlet 211 of the battery device 21 via the first branch pipeline 40 and the first branch pipeline 42. After exchanging heat with the battery device 21, the coolant enters the second branch pipeline 43 via the first coolant outlet 212 of the battery device 21, and then flows back to the thermal management module 30 via the second branch pipeline 41 and the second main pipeline 56.

[0203] That is, the main pipeline 50 is a primary pipeline, the first branch pipeline 40 and the second branch pipeline 41 are secondary pipelines, and the first branch pipeline 42 and the second branch pipeline 43 are tertiary pipelines.

[0204] The technical solution of this application embodiment connects the first branch pipe 40 and the first coolant inlet 211 through the first branch pipe 42, so that coolant can be delivered to each battery device 21. The second branch pipe 43 connects the second branch pipe 41 and the first coolant outlet 212, so that coolant can be output from each battery device 21, which helps to improve the reliability of the heat exchange cycle of the energy storage device 1.

[0205] In some embodiments, the dimensions of the container 10 are equal to those of a standard shipping container.

[0206] A standard container can be a container of the standard size used in transportation, such as 20 feet, 30 feet, 40 feet or 45 feet, which meets the corresponding standards and has corresponding dimensions for length, width and height.

[0207] A standard 20-foot container can have the following dimensions: length 6058mm, tolerance 0mm-6mm; width 2438mm, tolerance 0mm-5mm; and height 2896mm, 2591mm, or no greater than 2438mm, with a tolerance of 0mm-5mm.

[0208] A standard 30-foot container can have the following dimensions: length 9125mm, tolerance 0mm-10mm; width 2438mm, tolerance 0mm-5mm; and height 2896mm, 2591mm, or no more than 2438mm, with a tolerance of 0mm-5mm.

[0209] A standard 40-foot container can have the following dimensions: length 12192mm, tolerance 0mm-10mm; width 2438mm, tolerance 0mm-5mm; and height 2896mm, 2591mm, or no more than 2438mm, with a tolerance of 0mm-5mm.

[0210] A standard 45-foot container can have the following dimensions: length 13716mm, tolerance 0mm-10mm; width 2438mm, tolerance 0mm-5mm; and height 2591mm or 2896mm, tolerance 0mm-5mm.

[0211] In some embodiments, for housings 10 of various sizes, dimensions within ±5% of their dimensions can be considered as dimensions within tolerance ranges.

[0212] In some embodiments, the dimensions of the container 10 may be equal to those of a standard shipping container.

[0213] In some embodiments, the dimensions of the container 10 corresponding to the dimensions of a standard container refer to the dimensions of the container 10 along the length direction corresponding to the dimensions of the standard container along the length direction, the dimensions of the container 10 along the width direction corresponding to the dimensions of the standard container along the width direction, and the dimensions of the container 10 along the height direction corresponding to the dimensions of the standard container along the height direction.

[0214] That is, the dimensions of the container 10 along the length direction are the same as those of the standard container along the length direction, the dimensions of the container 10 along the width direction are the same as those of the standard container along the width direction, and the dimensions of the container 10 along the height direction are the same as those of the standard container along the height direction.

[0215] In some embodiments, the housing 10 of the energy storage device 1 can be a standard container, or the housing 10 can be manufactured according to the dimensions of a standard container.

[0216] During transportation, standard containers usually have corresponding transportation specifications. Especially during sea transportation, the transport ship has a placement area for each standard container, and the size of the container 10 corresponds to the size of the standard container, which facilitates the transportation of the energy storage device 1.

[0217] The technical solution of this application embodiment sets the size of the container 10 to be equal to the size of a standard container, so that the energy storage device 1 occupies the same space as a standard container during transportation, which complies with the transportation specifications of standard containers and facilitates the transportation of the energy storage device 1.

[0218] In some embodiments, at least one of the dimensions of the container 10 in the length direction, the width direction, and the height direction is not equal to the dimensions corresponding to a standard container.

[0219] In some embodiments, only one of the dimensions of the container 10 along its length, width, and height may be different from the dimensions corresponding to a standard container, while the dimensions of the other two may be equal to the dimensions corresponding to both of a standard container. For example, the dimensions of the container 10 along its length, width, and height may all be different from the dimensions corresponding to a standard container.

[0220] In some embodiments, two of the dimensions of the container 10 along its length, width, and height may not be equal to the dimensions of two corresponding to a standard container, while the dimension of the third may be equal to the dimensions of a standard container. For example, the dimensions of the container 10 along its length, width, and height may all be equal to the dimensions of a standard container.

[0221] In some embodiments, the dimensions of the container 10 along the length direction, the width direction, and the height direction are not equal to the dimensions corresponding to a standard container.

[0222] In some embodiments, when the dimensions of the container 10 are not equal to the dimensions corresponding to a standard container, the dimensions of the container 10 may be smaller than the dimensions corresponding to a standard container; or the dimensions of the container 10 may be larger than the dimensions corresponding to a standard container. For example, the dimensions of the container 10 along the height direction may be smaller than the dimensions of the standard container along the height direction, the dimensions of the container 10 along the width direction may be smaller than the dimensions of the standard container along the height direction, or the dimensions of the container 10 along the length direction may be smaller than the dimensions of the standard container along the height direction.

[0223] In some embodiments, depending on the usage scenario of the energy storage device 1, if the power demand is large, the size of the housing 10 of the energy storage device 1 can be increased so that the housing 10 can accommodate more battery devices 21, thereby increasing the energy storage capacity of the energy storage device 1.

[0224] In some embodiments, if the power demand is low, the number of battery devices 21 can be reduced, and the size of the energy storage device 1 housing 10 can be reduced to reduce space waste.

[0225] The technical solution of this application embodiment is to improve the practicality and applicability of the energy storage device 1 by setting at least one dimension of the container 10 to be different from the dimension corresponding to the standard container and changing the dimension of the container 10 based on the actual use of the energy storage device 1.

[0226] Please refer to Figure 2 This application embodiment also provides an energy storage system 200, which includes an energy storage converter and an energy storage device 1 as described above. The energy storage converter is used to electrically connect the power generation device 220 and the energy storage device 1.

[0227] Please refer to Figure 1 This application embodiment also provides a charging network 100, which includes a charging pile 110 and an energy storage device 1 as described above. The energy storage device 1 is used to provide electrical energy to the charging pile 110.

[0228] Please refer to Figures 3 to 5 In some embodiments, the energy storage device 1 includes a housing 10, multiple battery packs 20, a thermal management module 30, multiple first branch pipes 40, multiple second branch pipes 41, two main pipes 50, multiple first branch pipes 42, and multiple second branch pipes 43. Both main pipes 50 are connected to the thermal management module 30. The multiple first branch pipes 40 are connected to one main pipe 50, and the multiple second branch pipes 41 are connected to the other main pipe 50. Each first branch pipe 40 is connected to multiple first branch pipes 42, and each second branch pipe 41 is connected to multiple second branch pipes 43.

[0229] In some embodiments, the number of main pipes 50 is two, including a first main pipe 55 and a second main pipe 56.

[0230] Each battery device group 20 includes multiple battery devices 21. Each battery device includes a first coolant inlet 211 and a first coolant outlet 212. The first coolant inlet 211 of each battery device 21 is connected to a first branch pipe 42, and the first coolant outlet 212 of each battery device 21 is connected to a second branch pipe 43.

[0231] In some embodiments, the thermal management module includes a second coolant outlet 31 and a second coolant inlet 32. The thermal management module 30 delivers coolant to the first main pipeline 55 through the second coolant outlet 31. The coolant flows into the first coolant inlet 211 of the battery device 21 through the first branch pipeline 40 and the first branch pipeline 42. After exchanging heat with the battery device 21, the coolant enters the second branch pipeline 43 through the first coolant outlet 212 of the battery device 21, flows back to the thermal management module 30 through the second branch pipeline 41 and the second main pipeline 56, and then through the second coolant inlet 32.

[0232] In some embodiments, there are two drain valves 60, and the two drain valves 60 are respectively provided in two main pipelines 50.

[0233] In some embodiments, the number of switching valves 70 is multiple, and each first branch line 40 and each second branch line 41 is provided with a switching valve 70.

[0234] In some embodiments, when the battery device 21 in the energy storage device 1 fails, the thermal management module 30 is shut down, that is, the second coolant outlet 31 and the second coolant inlet 32 ​​are closed, so that the thermal management module 30 and the two main pipelines 50 are not connected. The switch valve 70 on the first branch pipeline 40 of the battery device group 20 corresponding to the failed battery device 21 is opened, the switch valve 70 on the second branch pipeline 41 of the battery device group 20 corresponding to the failed battery device 21 is opened, and the switch valve 70 on the first branch pipeline 40 of other battery device groups 20 and the switch valve 70 on the second branch pipeline 41 of other battery device groups 20 are closed.

[0235] Open the drain valve 60 to drain the coolant from the faulty battery device 21, the coolant from the other battery devices 21 in the battery group 20 corresponding to the faulty battery device 21, the coolant from the first branch pipe 40 of the battery group 20 corresponding to the faulty battery device 21, the coolant from the second branch pipe 41 of the battery group 20 corresponding to the faulty battery device 21, and the coolant from the two main pipes 50.

[0236] In some embodiments, the drain valve 60 can drain liquid in one manner while the other drain valve 60 injects gas.

[0237] In this embodiment of the technical solution, since a drain valve 60 is provided on the main pipeline 50, when the battery device 21 of the energy storage device 1 malfunctions, the coolant in the battery device 21 can be drained through the drain valve 60 before the battery device 21 can be removed. Compared to providing drain valves 60 on each first branch pipeline 40 and each second branch pipeline 41, providing drain valves 60 on the main pipeline 50 for draining reduces the number of drain valves 60, which is beneficial for cost savings. Simultaneously, since the number of drain valves 60 is smaller, the impact of the drain valves 60 on the inner diameter of the main pipeline 50 is reduced, thereby reducing the flow resistance of the transported coolant, reducing the energy consumption of transported coolant, and improving the economic efficiency of the energy storage device 1. Furthermore, since the number of drain valves 60 is smaller, the internal space of the energy storage device 1 is saved, which is beneficial for improving the space utilization rate of the energy storage device 1.

[0238] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: Box; Multiple battery device groups are disposed inside the housing. Each battery device group includes multiple battery devices arranged along the direction of gravity. Each battery device includes a first coolant inlet and a first coolant outlet. A thermal management module is used to exchange coolant with the battery device, and the thermal management module includes a second coolant inlet and a second coolant outlet; Multiple first branch pipes correspond one-to-one with multiple battery device groups, and the first coolant inlet of multiple battery devices in the battery device group is connected to the corresponding first branch pipe; Multiple second branch pipes correspond one-to-one with multiple battery device groups, and the first coolant outlet of multiple battery devices in the battery device group is connected to the corresponding second branch pipe; Two main pipelines, including a first main pipeline and a second main pipeline, wherein the first main pipeline is connected to the second coolant outlet and a plurality of first branch pipelines, and the second main pipeline is connected to the second coolant inlet and a plurality of second branch pipelines; A drain valve is provided on at least one of the main pipelines.

2. The energy storage device according to claim 1, characterized in that, There are two drain valves, which are respectively installed on the two main pipelines.

3. The energy storage device according to claim 1, characterized in that, The energy storage device also includes multiple switching valves, and both the first branch pipeline and the second branch pipeline are equipped with the switching valves.

4. The energy storage device according to claim 1, characterized in that, In the direction of gravity, the main pipeline is located below the battery pack.

5. The energy storage device according to claim 1, characterized in that, The enclosure includes a first compartment and a second compartment, the battery pack is located in the first compartment, and the thermal management module is located in the second compartment; The drain valve is located in the second compartment.

6. The energy storage device according to claim 1, characterized in that, The enclosure includes a first compartment and a second compartment, the battery pack is located in the first compartment, and the thermal management module is located in the second compartment; The drain valve is located in the first compartment and below the battery assembly.

7. The energy storage device according to claim 1, characterized in that, The inner diameter of the main pipeline is larger than the inner diameter of the first branch pipeline, and the inner diameter of the main pipeline is larger than the inner diameter of the second branch pipeline.

8. The energy storage device according to claim 1, characterized in that, The main pipeline has an opening in its wall, at least a portion of which is located outside the pipe wall, and one end of which is welded to the periphery of the opening.

9. The energy storage device according to claim 1, characterized in that, The main pipeline includes a first pipe section, a second pipe section, and a tee pipe. The tee pipe includes a first end, a second end, and a third end that are interconnected. The first end is connected to the first pipe section, the second end is connected to the second pipe section, and the third end is connected to the drain valve.

10. The energy storage device according to claim 9, characterized in that, The energy storage device also includes a connecting pipe, one end of which is connected to the third end, and the other end of which is connected to the drain valve.

11. The energy storage device according to claim 9, characterized in that, The drain valve is connected to the third end via a quick-release mechanism.

12. The energy storage device according to claim 11, characterized in that, The quick-release mechanism includes a first chuck, a second chuck, and a clamp. The first chuck is integrally formed with the third end, the second chuck is connected to the drain valve, and the clamp is sleeved on the first chuck and the second chuck, and the first chuck and the second chuck are connected by the clamp.

13. The energy storage device according to claim 1, characterized in that, The energy storage device further includes a first branch pipe and a second branch pipe. The first coolant inlet is connected to the first branch pipe through the first branch pipe, and the first coolant outlet is connected to the second branch pipe through the second branch pipe.

14. The energy storage device according to claim 1, characterized in that, The dimensions of the container are the same as those of a standard shipping container.

15. The energy storage device according to claim 1, characterized in that, At least one of the dimensions of the container in the length direction, width direction, and height direction is not equal to the dimensions corresponding to a standard container.

16. An energy storage system, characterized in that, include: Energy storage converter; The energy storage device as described in any one of claims 1-15, wherein the energy storage converter is used to electrically connect the power generation device and the energy storage device.

17. A charging network, characterized in that, include: Charging stations; The energy storage device as described in any one of claims 1-15 is used to provide electrical energy to the charging pile.

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