Energy storage apparatus

Abstract

The present application relates to the technical field of energy storage, and provides an energy storage apparatus. The energy storage apparatus comprises a cabinet, a battery apparatus, a heat exchange unit, a thermal management assembly, and a reversing assembly. The heat exchange unit has a first outlet and a first inlet. The thermal management assembly comprises a plurality of thermal management components. A flow channel for a heat exchange medium to flow is formed inside each thermal management component. Each flow channel is provided with a first communication port and a second communication port. Each thermal management component forms a heat exchange circuit with the heat exchange unit. The reversing assembly is disposed on the heat exchange circuit. The reversing assembly has a first state and a second state. The reversing assembly is configured to: in the first state, communicate the first outlet with the first communication port and communicate the first inlet with the second communication port; and in the second state, communicate the first outlet with the second communication port and communicate the first inlet with the first communication port. Thus, the reversal of the heat exchange medium within the flow channel of the thermal management component is achieved, thereby alleviating the phenomenon of non-uniform heat exchange of the thermal management component.

Description

Energy storage devices Cross-reference to related applications

[0001] This application claims priority to Chinese patent application 2024116052372 entitled “Energy Storage Device”, filed on November 11, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of energy storage technology, and more specifically, to an energy storage device. Background Technology

[0003] In recent years, with the rapid development of technology, major base stations, such as 5G base stations, have been vigorously promoted. Among the basic operating equipment of base stations, energy storage devices play a crucial role in energy storage and supply. These energy storage devices include multiple battery units to increase the voltage and capacity of the energy storage system. Because the battery units generate a large amount of heat during continuous charging and discharging, the internal temperature of the energy storage device can rise sharply, severely affecting its performance and lifespan. Therefore, related technologies typically incorporate thermal management components to cool the battery units. However, the heat exchange capacity of existing thermal management components is uneven, resulting in poor heat exchange efficiency and causing energy storage devices to still suffer from short lifespans or poor performance during use. Summary of the Invention

[0004] This application provides an energy storage device that can effectively improve the performance and service life of the energy storage device.

[0005] In a first aspect, embodiments of this application provide an energy storage device, including a cabinet, a battery device, a heat exchange unit, a thermal management component, and a reversing component; the battery device is housed within the cabinet and includes multiple battery cells; the heat exchange unit provides a heat exchange medium and has a first outlet for the heat exchange medium to flow out and a first inlet for the heat exchange medium to flow in; the thermal management component includes multiple thermal management parts configured to manage the temperature of the battery device, and each thermal management part has a flow channel for the heat exchange medium to flow through, the flow channel having a first connection port and a second connection port, each thermal management part forming a heat exchange loop with the heat exchange unit; the reversing component is disposed on the heat exchange loop, and the reversing component has a first state and a second state, the reversing component being configured to: in the first state, connect the first outlet and the first connection port and connect the first inlet and the second connection port; in the second state, connect the first outlet and the second connection port and connect the first inlet and the first connection port.

[0006] In the above technical solution, the thermal management assembly is equipped with multiple thermal management components, each of which forms a heat exchange loop with the heat exchange unit. A reversing component is installed on the heat exchange loop. The reversing component enables communication between the first outlet and the first connecting port, and between the first inlet and the second connecting port, in a first state. In a second state, it enables communication between the first outlet and the second connecting port, and between the first inlet and the first connecting port. This allows the heat exchange medium to be redirected within the flow channels of the thermal management components. This energy storage device, with its parallel structure, reduces the mutual influence of the heat exchange media within the flow channels of the multiple thermal management components and minimizes the temperature difference of the heat exchange media within the flow channels, thereby effectively improving efficiency. On the one hand, it improves the heat exchange uniformity among multiple thermal management components. On the other hand, switching the flow direction of the heat exchange medium in the flow channel of the thermal management component during the use of the energy storage device can effectively alleviate the phenomenon that the temperature of the heat exchange medium at the first connection port is lower than that at the second connection port, or the temperature of the heat exchange medium at the second connection port is lower than that at the first connection port. This can improve the phenomenon of excessive temperature difference in different areas of the thermal management component during use, thereby alleviating the phenomenon of uneven heat exchange in the thermal management component. This improves the effect of the thermal management component in temperature management of the battery device, and further improves the temperature consistency among multiple battery cells in the battery device or the temperature consistency of the battery cells themselves, which is beneficial to improving the service life and performance of the energy storage device.

[0007] In some embodiments, the reversing assembly includes a first valve module and a second valve module; the first valve module has a second inlet, a second outlet, and a third outlet, the second inlet being connected to the first outlet, and the second outlet and the third outlet being configured to selectively connect to the second inlet; the second valve module has a fourth outlet, a third inlet, and a fourth inlet, the fourth outlet being connected to the first inlet, and the third inlet and the fourth inlet being configured to selectively connect to the fourth outlet; wherein the second outlet and the third inlet are both connected to the first connection port, and the third outlet and the fourth inlet are both connected to the second connection port.

[0008] In the above technical solution, the first valve module is provided with a second inlet, a second outlet, and a third outlet. The second inlet is connected to the first outlet of the heat exchange unit, and the second outlet and the third outlet can be selectively connected to the second inlet. The second valve module is also provided with a fourth outlet, a third inlet, and a fourth inlet. The fourth outlet is connected to the first inlet of the heat exchange unit, and the third inlet and the fourth inlet can be selectively connected to the fourth outlet. This allows the reversing component to have a first state that enables communication between the first outlet and the first connecting port, as well as between the first inlet and the second connecting port, and a second state that enables communication between the first outlet and the second connecting port, as well as between the first inlet and the first connecting port. Thus, the reversing component enables the heat exchange medium to be reversed within the flow channel of the heat management component. The structure is simple and easy to control.

[0009] In some embodiments, the first valve module is a three-way valve.

[0010] In the above technical solution, by setting the first valve module as a three-way valve, the first valve module has a second inlet, a second outlet and a third outlet, and the second outlet and the third outlet can be selectively connected to the second inlet. The structure is simple and easy to assemble.

[0011] In some embodiments, the first valve module includes a first valve and a second valve, both of which are two-way valves; wherein the first valve has two first ports, the second valve has two second ports, one of the first ports of the first valve and one of the second ports of the second valve are connected to form a second inlet, the other first port of the first valve is a second outlet, and the other second port of the second valve is a third outlet.

[0012] In the above technical solution, the first valve module is provided with a first valve and a second valve, both of which are two-way valves. By connecting one first port of the first valve and one second port of the second valve to form the second inlet of the first valve module, and the other first port of the first valve and the other second port of the second valve to be the second outlet and the third outlet of the first valve module respectively, the second outlet and the third outlet can be selectively connected to the second inlet. The structure is simple and can reduce the mutual influence between the second outlet and the third outlet, which is beneficial to improving the stability of the first valve module.

[0013] In some embodiments, the second valve module is a three-way valve.

[0014] In the above technical solution, by setting the second valve module as a three-way valve, the second valve module has a fourth outlet, a third inlet and a fourth inlet, and the third inlet and the fourth inlet can be selectively connected to the fourth outlet. The structure is simple and easy to assemble.

[0015] In some embodiments, the second valve module includes a third valve and a fourth valve, both of which are two-way valves; wherein the third valve has two third ports, the fourth valve has two fourth ports, one of the third ports of the third valve and one of the fourth ports of the fourth valve are connected to form the fourth outlet, the other third port of the third valve is the third inlet, and the other fourth port of the fourth valve is the fourth inlet.

[0016] In the above technical solution, the second valve module is provided with a third valve and a fourth valve, both of which are two-way valves. By connecting one third port of the third valve and one fourth port of the fourth valve to form the fourth outlet of the second valve module, and the other third port of the third valve and the other fourth port of the fourth valve to be the third inlet and the fourth inlet of the second valve module respectively, the third inlet and the fourth inlet can be selectively connected to the fourth outlet. The structure is simple and can reduce the mutual influence between the third inlet and the fourth inlet, which is beneficial to improving the stability of the second valve module.

[0017] In some embodiments, both the first valve module and the second valve module are three-way ball valves.

[0018] In the above technical solution, by setting both the first valve module and the second valve module as three-way ball valves, the flow direction of the heat exchange medium in the flow channel of the heat management component can be switched by the reversing component, and the adjustment angle of the first valve module and the second valve module can be more flexible. This reduces the difficulty of switching the flow direction of the heat exchange medium by the reversing component, while also regulating the flow rate of the heat exchange medium.

[0019] In some embodiments, the thermal management component further includes a first delivery pipe and a second delivery pipe, wherein the first connection ports of the plurality of thermal management components are all connected to the first delivery pipe, and the second connection ports of the plurality of thermal management components are all connected to the second delivery pipe; wherein the reversing component is configured to: connect the first outlet and the first delivery pipe and connect the first inlet and the second delivery pipe in the first state; and connect the first outlet and the second delivery pipe and connect the first inlet and the first delivery pipe in the second state.

[0020] In the above technical solution, the thermal management component is provided with a first conveying pipe and a second conveying pipe. The first conveying pipe is connected to the first connection port of multiple thermal management components, and the second conveying pipe is connected to the second connection port of multiple thermal management components, so as to realize the parallel connection between multiple thermal management components. In this case, by setting the reversing component to connect the first outlet and the first conveying pipe and the first inlet and the second conveying pipe in the first state, and to connect the first outlet and the second conveying pipe and the first inlet and the first conveying pipe in the second state, the reversing component can simultaneously switch the flow direction of the heat exchange medium in the flow channel of multiple thermal management components, so as to facilitate control and assembly.

[0021] In some embodiments, the energy storage device includes a plurality of battery packs, each battery pack including a plurality of battery devices arranged along a first direction, the plurality of battery packs being arranged along a second direction perpendicular to the first direction; wherein, the energy storage device includes a plurality of thermal management components, each corresponding to one of the battery packs.

[0022] In the above technical solution, the energy storage device is provided with multiple battery packs, and each battery pack is provided with multiple battery devices arranged along the first direction, thereby increasing the capacity of the energy storage device. By providing a thermal management component for each battery pack, the capacity of the energy storage device can be increased while the temperature of the multiple battery devices in each battery pack can be easily managed, thereby reducing the temperature rise of the energy storage device during use, which is beneficial to improving the reliability of the energy storage device and reducing the assembly difficulty of the energy storage device.

[0023] In some embodiments, the energy storage device includes a plurality of the commutation components, and each of the thermal management components is connected to the heat exchange unit via one of the commutation components.

[0024] In the above technical solution, the energy storage device is equipped with multiple commutation components, and each commutation component corresponds to a thermal management component, so that the flow direction switching of the heat exchange medium in the flow channel of the thermal management component of each thermal management component is controlled by the corresponding commutation component. This makes each thermal management component a structure that is independently controlled by the corresponding commutation component, so that the flow direction switching of the heat exchange medium among multiple thermal management components does not affect each other.

[0025] In some embodiments, the energy storage device further includes a plurality of first detection modules and a plurality of first control modules, wherein the first detection modules, the first control modules, the commutation components, and the thermal management components correspond one-to-one, and each first control module is electrically connected to the corresponding first detection module and the corresponding commutation component; wherein, the first detection module is used to detect the first temperature of the heat exchange medium in the first delivery pipe of the corresponding thermal management component and the second temperature of the heat exchange medium in the second delivery pipe, and the first control module is configured to control the corresponding commutation component to switch between the first state and the second state when the difference between the first temperature and the second temperature is greater than a first preset value.

[0026] In the above technical solution, the energy storage device is further equipped with multiple first detection modules and multiple first control modules. The first control modules, commutation components, and thermal management components are all one-to-one corresponding structures. The first detection modules can detect the first temperature of the heat exchange medium in the first delivery pipe and the second temperature of the heat exchange medium in the second delivery pipe of the corresponding thermal management component. This allows the first control module to control the corresponding commutation component to switch between the first and second states based on the detection results of the corresponding first detection modules. This enables the automatic switching of the commutation component's state according to the actual usage of the thermal management component, thereby further improving the automation level of the commutation component and further mitigating the phenomenon of excessive temperature difference in different areas of the thermal management component during use. This further alleviates the phenomenon of uneven heat exchange in the thermal management component, thereby further improving the effect of the thermal management component in temperature management of the battery device, which is conducive to further improving the service life and performance of the energy storage device.

[0027] In some embodiments, the energy storage device further includes a first pipeline and a second pipeline, wherein the first delivery pipes of the plurality of thermal management components are all connected to the first pipeline, and the second delivery pipes of the plurality of thermal management components are all connected to the second pipeline; wherein the first pipeline and the second pipeline are connected to the heat exchange unit through a reversing component, the reversing component being configured to: connect the first outlet and the first pipeline and connect the first inlet and the second pipeline in the first state; and connect the first outlet and the second pipeline and connect the first inlet and the first pipeline in the second state.

[0028] In the above technical solution, the first pipeline of the energy storage device is connected to the first delivery pipeline of multiple thermal management components, and the second pipeline of the energy storage device is connected to the second delivery pipeline of multiple thermal management components, so that the multiple thermal management components are connected in parallel through the first pipeline and the second pipeline. By setting the first pipeline and the second pipeline to be connected to the heat exchange unit through a reversing component, the reversing component can connect the first outlet and the first pipeline and the first inlet and the second pipeline in the first state, and can connect the first outlet and the second pipeline and the first inlet and the first pipeline in the second state. In this way, the flow direction of the heat exchange medium in the flow channel of the thermal management component of multiple thermal management components can be switched simultaneously through a reversing component. The structure is simple and easy to control and operate.

[0029] In some embodiments, the energy storage device further includes a second detection module and a second control module, wherein the second control module is electrically connected to the second detection module and the commutation component; wherein the second detection module is used to detect a third temperature of the heat exchange medium in the first pipeline and a fourth temperature of the heat exchange medium in the second pipeline, and the second control module is configured to control the commutation component to switch between the first state and the second state when the difference between the third temperature and the fourth temperature is greater than a second preset value.

[0030] In the above technical solution, the energy storage device is further equipped with a second detection module and a second control module. The second detection module can detect the third temperature of the heat exchange medium in the first pipeline and the fourth temperature of the heat exchange medium in the second pipeline. This allows the second control module to control the commutation component to switch between the first and second states based on the detection results of the second detection module. This enables automatic switching of the commutation component's state according to the actual usage of the thermal management component, thereby further improving the automation level of the commutation component and mitigating the excessive temperature difference between different areas of the thermal management component during use. This further alleviates the uneven heat exchange phenomenon in the thermal management component, thereby further improving the effect of the thermal management component in temperature management of the battery device, which is beneficial to further improving the service life and performance of the energy storage device.

[0031] In some embodiments, the energy storage device includes a plurality of the commutation components, each of which corresponds to a thermal management component, and each thermal management component is connected to the heat exchange unit through one of the commutation components.

[0032] In the above technical solution, the energy storage device is equipped with multiple commutation components, and each thermal management component is equipped with a corresponding commutation component, so that the flow direction switching of the heat exchange medium in the flow channel of each thermal management component is controlled by the corresponding commutation component, thereby making each thermal management component a structure that is independently controlled by the corresponding commutation component, so as to realize that the flow direction switching of the heat exchange medium among multiple thermal management components does not affect each other.

[0033] In some embodiments, the energy storage device further includes a plurality of third detection modules and a plurality of third control modules, wherein the third detection modules, the third control modules, the commutation components, and the thermal management components correspond one-to-one, and each third control module is electrically connected to the corresponding third detection module and the corresponding commutation component; wherein, the third detection module is used to detect the fifth temperature and the sixth temperature of the heat exchange medium at the first connection port of the corresponding thermal management component, and the third control module is configured to control the corresponding commutation component to switch between the first state and the second state when the difference between the fifth temperature and the sixth temperature is greater than the third preset value.

[0034] In the above technical solution, the energy storage device is also equipped with multiple third detection modules and multiple third control modules. The third control modules, commutation components, and thermal management components are all one-to-one corresponding structures. The third detection modules can detect the fifth temperature and the sixth temperature of the heat exchange medium at the first connection port of the corresponding thermal management component. This allows the third control module to control the corresponding commutation component to switch between the first and second states based on the detection results of the corresponding third detection modules. This enables the automatic switching of the commutation component's state according to the actual usage of the thermal management component, thereby further improving the automation level of the commutation component and further mitigating the phenomenon of excessive temperature differences in different areas of the thermal management component during use. This further alleviates the phenomenon of uneven heat exchange in the thermal management component, thereby further improving the effect of the thermal management component in temperature management of the battery device, which is conducive to further improving the service life and performance of the energy storage device.

[0035] In some embodiments, the battery device further includes a housing, in which a plurality of battery cells are housed, and the plurality of battery cells are arranged in a second direction and a third direction; wherein the thermal management component is provided on at least one side of the battery device in the first direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0036] In the above technical solution, the multiple battery cells of the battery device are arranged in a structure along the second direction and the third direction in the housing. By providing a thermal management component on at least one side of the battery device along the first direction, the thermal management component can be correspondingly arranged with the multiple battery cells in the housing of the battery device, thereby facilitating heat exchange between the thermal management component and the multiple battery cells in the battery device, which is beneficial to further improve the heat exchange effect between the thermal management component and the battery device.

[0037] In some embodiments, the energy storage device includes a battery pack, the battery pack including a plurality of battery devices arranged along the first direction, each battery device having the thermal management component disposed on at least one side of the first direction.

[0038] In the above technical solution, the battery pack of the energy storage device is provided with multiple battery devices arranged along the first direction, and each battery device is provided with a thermal management component on at least one side of the first direction. This can improve the heat exchange effect of the thermal management component on the multiple battery devices, which is beneficial to reduce the temperature rise of the energy storage device during use. On the other hand, it can optimize the internal structural layout of the energy storage device and reduce the assembly difficulty between the battery devices and the thermal management component.

[0039] In some embodiments, the thermal management component corresponds one-to-one with the battery device, and the thermal management component is disposed at the bottom of the battery device.

[0040] In the above technical solution, by placing the thermal management component at the bottom of the battery device in the first direction, the thermal management component can provide some support to the battery device to improve structural stability. On the other hand, it can realize the battery device as a bottom heat exchange structure, which is conducive to improving the heat exchange effect between the thermal management component and the battery device.

[0041] In some embodiments, along the first direction, the projection of the battery device is located within the corresponding thermal management component.

[0042] In the above technical solution, by setting the projection of the battery device in the first direction to be located inside the thermal management component, multiple battery cells in the battery device can correspond to at least a portion of the thermal management component in the first direction, and the thermal management component corresponds to the entire battery device in the first direction, thereby further improving the heat exchange effect between the thermal management component and the battery device, which is beneficial to improving the service life and performance of the energy storage device.

[0043] In some embodiments, in a projection plane perpendicular to the first direction, the area defined by the outer contours of the orthographic projections of the plurality of battery cells is greater than or equal to 0.48m². 2 .

[0044] In the above technical solution, the area defined by the outer contour of the projection of multiple battery cells in the first direction is set to be greater than or equal to 0.48m². 2 This increases the number of battery cells housed within the battery pack, enabling larger capacity battery packs. This, in turn, increases the overall capacity of the energy storage device. Furthermore, it alleviates uneven heat exchange in the thermal management components while simultaneously improving the thermal management components' ability to manage the battery pack's temperature. This ultimately enhances the lifespan and performance of large-capacity energy storage devices.

[0045] In some embodiments, the battery cell has a capacity greater than or equal to 200 Ah.

[0046] In the above technical solution, by setting the capacity of the battery cell to be greater than or equal to 200Ah, a large-capacity battery device can be achieved, thereby increasing the overall capacity of the energy storage device. This not only increases the capacity of the energy storage device but also alleviates the phenomenon of uneven heat exchange in the thermal management components, thereby improving the effect of the thermal management components in temperature management of the battery device. This is beneficial to improving the service life and performance of the large-capacity energy storage device. Attached Figure Description

[0047] 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.

[0048] Figure 1 is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application;

[0049] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0050] Figure 3 is a partial structural schematic diagram of the thermal management system of an energy storage device provided in some embodiments of this application;

[0051] Figure 4 is a partial enlarged view of point A in the thermal management system shown in Figure 3;

[0052] Figure 5 is a schematic diagram of the structure of the thermal management component of the thermal management system provided in some embodiments of this application;

[0053] Figure 6 is a simplified structural diagram of the thermal management system of the energy storage device provided in some embodiments of this application;

[0054] Figure 7 is a schematic diagram of the structure of the thermal management component of the thermal management assembly provided in some embodiments of this application;

[0055] Figure 8 is a simplified structural diagram of the thermal management system of an energy storage device provided in some embodiments of this application;

[0056] Figure 9 is a simplified structural diagram of the first valve module of the thermal management system of an energy storage device provided in some embodiments of this application;

[0057] Figure 10 is a simplified structural diagram of the second valve module of the thermal management system of an energy storage device provided in some embodiments of this application;

[0058] Figure 11 is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application;

[0059] Figure 12 is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application.

[0060] Icons: 100 - Energy storage device; 10 - Cabinet; 20 - Battery pack; 21 - Battery unit; 211 - Housing; 2111 - First housing body; 2112 - Second housing body; 212 - Individual battery cell; 30 - Thermal management system; 31 - Heat exchanger unit; 311 - First outlet; 312 - First inlet; 32 - Thermal management component; 321 - Thermal management part; 3211 - Flow channel; 3212 - First connection port; 3213 - Second connection port; 322 - First conveying pipe; 323 - Second conveying pipe; 33 - Reversing component; 331 - First valve module; 3311 - Second inlet; 3312 - Second outlet; 3313 - Third outlet; 3314 - First valve; 3314a - First interface; 3315 - Second valve; 3315b - Second interface; 3316 - First tee pipe; 3316a - First opening; 332 - Second valve module; 3321 - Fourth outlet; 3322 - Third inlet; 3323 - Fourth inlet; 3324 - Third valve; 3324a - Third interface; 3325 - Fourth valve; 3325a - Fourth interface; 3326 - Second tee pipe; 3326a - Second opening; 333 - First connecting pipe; 334 - Second connecting pipe; 335 - Third connecting pipe; 336 - Fourth connecting pipe; 34 - First pipeline; 35 - Second pipeline; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0061] 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 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.

[0062] 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.

[0063] In this application, the reference to "embodiment" means that a particular 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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0064] 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.

[0065] 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.

[0066] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0067] In this application, "multiple" means two or more (including two).

[0068] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0069] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0070] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include, but are not limited to, square battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0071] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0072] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0073] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0074] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0075] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0076] As an example, the enclosure may include a first enclosure body and a second enclosure body. The first enclosure body and the second enclosure body are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, which can be either sealed or unsealed. The first enclosure body may be a top cover or a bottom plate.

[0077] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0078] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0079] The energy storage device mentioned in the embodiments of this application includes one or more battery clusters to improve the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices, and the multiple battery devices in each battery cluster may be arranged in a single row or multiple rows; that is, each battery cluster may include one or more battery packs, and each battery pack includes multiple battery devices stacked on top of each other. The multiple battery devices are connected in series through a busbar to improve the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0080] In some embodiments, the energy storage device includes a housing, with a door on at least one side. The energy storage device is an energy storage container or an energy storage cabinet.

[0081] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0082] Energy storage devices possess outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide applicability, and low self-discharge coefficient, making them an important component of today's new energy development. The development of battery technology must simultaneously consider multiple design factors, such as energy density, cycle life, discharge capacity, and charge / discharge rate.

[0083] For typical energy storage devices, multiple battery units are included to increase the voltage and capacity of the energy storage device. However, due to the large amount of heat generated by the battery units during continuous charging and discharging, the internal temperature of the energy storage device can rise sharply, severely affecting its performance and lifespan. This temperature rise becomes even more pronounced with increasing capacity demands. To address this issue, related technologies typically incorporate thermal management components within the energy storage device for heat exchange with the battery units. These components cool the battery units through heat exchange. While thermal management components can manage the temperature of the battery device to reduce the risk of temperature rise during use, existing thermal management components typically have a unidirectional flow of coolant inside. This results in a significant temperature difference between different areas of the thermal management component used for heat exchange with the battery device, where the temperature near the coolant inlet is lower than the temperature near the coolant outlet. Consequently, the heat exchange is uneven, leading to poor heat exchange efficiency between the thermal management component and the battery device within the energy storage device. This, in turn, results in problems such as short lifespan or poor performance of the energy storage device during use.

[0084] Based on the above considerations, in order to solve the problems of short service life or poor performance of energy storage devices, this application provides an energy storage device, which includes a cabinet, a battery unit, a heat exchange unit, a thermal management component, and a commutation component. The battery unit is housed within the cabinet and includes multiple individual battery cells. The heat exchange unit provides a heat exchange medium and has a first outlet for the heat exchange medium and a first inlet for the heat exchange medium to flow into. The thermal management component includes multiple thermal management elements configured to manage the temperature of the battery unit. Each thermal management element has a flow channel for the heat exchange medium, with a first connection port and a second connection port. Each thermal management element forms a heat exchange loop with the heat exchange unit. The commutation component is disposed on the heat exchange loop and has a first state and a second state. The commutation component is configured to: in the first state, connect the first outlet and the first connection port and connect the first inlet and the second connection port; in the second state, connect the first outlet and the second connection port and connect the first inlet and the first connection port.

[0085] In this type of energy storage device, the thermal management assembly includes multiple thermal management components. Each thermal management component forms a heat exchange loop with the heat exchange unit, and a reversing component is installed on the heat exchange loop. The reversing component enables communication between the first outlet and the first connecting port, and between the first inlet and the second connecting port, in a first state. In a second state, it enables communication between the first outlet and the second connecting port, and between the first inlet and the first connecting port. This allows the heat exchange medium to change direction within the flow channels of the thermal management components. This structure allows multiple thermal management components to be connected in parallel, reducing mutual interference between the heat exchange media within the flow channels of the components and minimizing temperature differences. This effectively... Improving the heat exchange uniformity among multiple thermal management components, and switching the flow direction of the heat exchange medium in the flow channel of the thermal management component during the use of the energy storage device, can effectively alleviate the phenomenon that the temperature of the heat exchange medium at the first connection port is lower than that at the second connection port, or the temperature of the heat exchange medium at the second connection port is lower than that at the first connection port. This can improve the phenomenon of excessive temperature difference in different areas of the thermal management component during use, thereby alleviating the phenomenon of uneven heat exchange in the thermal management component, improving the temperature management effect of the thermal management component on the battery device, and further improving the temperature consistency among multiple battery cells in the battery device or the temperature consistency of the battery cells themselves, which is beneficial to improving the service life and performance of the energy storage device.

[0086] The energy storage device disclosed in this application can be used, but is not limited to, in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. The energy storage device can store electrical energy as needed and output it at appropriate times. For example, the energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. For ease of explanation, the specific structure of the energy storage device is described in detail below with reference to the accompanying drawings.

[0087] Please refer to Figure 1, which is a structural schematic diagram of an energy storage device 100 provided in some embodiments of this application. This application provides an energy storage device 100, which includes a cabinet 10 and a battery pack 20. The battery pack 20 is housed within the cabinet 10 and includes a plurality of battery devices 21.

[0088] The cabinet 10 provides storage space for the battery pack 20. The cabinet 10 can have various shapes, such as a cylinder, cuboid, or cube. For example, in Figure 1, the cabinet 10 is a cuboid.

[0089] Optionally, the energy storage device 100 may include one battery pack 20 or multiple battery packs 20. For example, in FIG1, the energy storage device 100 includes multiple battery packs 20 arranged along a second direction Y, and each battery pack 20 includes multiple battery devices 21 arranged along a first direction X. In some embodiments, the interior of the cabinet 10 may be divided to form multiple receiving compartments arranged along the second direction Y, and each receiving compartment is used to receive one battery pack 20.

[0090] In some embodiments, referring to FIG2, which is an exploded view of the structure of a battery device 21 provided in some embodiments of the present application, the battery device 21 may include a housing 211 and a battery cell 212, the battery cell 212 being housed within the housing 211.

[0091] The housing 211 provides assembly space for the battery cells 212, and can adopt various structures. The housing 211 may include a first housing body 2111 and a second housing body 2112, which overlap each other, jointly defining the assembly space for accommodating the battery cells 212. The second housing body 2112 can be a hollow structure open at one end, while the first housing body 2111 can be a plate-like structure, covering the open side of the second housing body 2112, so that the first housing body 2111 and the second housing body 2112 jointly define the assembly space; alternatively, both the first housing body 2111 and the second housing body 2112 can be hollow structures open on one side, with the open side of the first housing body 2111 covering the open side of the second housing body 2112.

[0092] Of course, in the embodiments of this application, the shape of the box 211 formed by the first box body 2111 and the second box body 2112 can also be various, such as a cylinder, a cuboid, or a cube. For example, in FIG2, the shape of the box 211 is a cuboid.

[0093] In the battery device 21, multiple battery cells 212 can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 212 are connected in both series and parallel. Multiple battery cells 212 can be directly connected in series, parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 212 is housed in the housing 211. Of course, the battery device 21 can also be formed by first connecting multiple battery cells 212 in series, parallel, or in a mixed manner to form a battery module, and then connecting multiple battery modules in series, parallel, or in a mixed manner to form a whole assembly, which is then housed in the housing 211.

[0094] For example, the housing 211 of the battery device 21 is provided with multiple rows of battery cells 212 arranged along the second direction Y, and each row of battery cells 212 includes multiple battery cells 212 arranged along the third direction Z, so that the multiple battery cells 212 are arranged in a structure in the second direction Y and the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0095] In some embodiments, the battery device 21 may also include other structures. For example, the battery device 21 may also include a busbar component for connecting multiple battery cells 212 to achieve electrical connection between the multiple battery cells 212. Exemplarily, the busbar component may be made of aluminum, copper, or aluminum alloy, etc.

[0096] Each battery cell 212 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but the embodiments of this application are not limited to these. The battery cell 212 can be in the form of a cuboid, a cylinder, a prism, or other shapes. For example, in Figure 2, the battery cell 212 is a cylindrical structure.

[0097] In some embodiments, as shown in FIG1, the energy storage device 100 may also be provided with a thermal management system 30. The thermal management system 30 includes a heat exchange unit 31 and a thermal management component 32. The heat exchange unit 31 is used to provide a heat exchange medium. The thermal management component 32 is connected to the heat exchange unit 31. The thermal management component 32 is disposed inside the cabinet 10 and is used to exchange heat with the battery device 21 to manage the temperature of the battery device 21.

[0098] For example, the heat exchange unit 31 can be a structure installed outside the cabinet 10 of the energy storage device 100, or it can be a structure installed inside the cabinet 10 of the energy storage device 100. When the heat exchange unit 31 is installed outside the cabinet 10 of the energy storage device 100, the heat exchange unit 31 can be a structure installed on the cabinet 10 of the energy storage device 100, or it can be not connected to the cabinet 10 of the energy storage device 100. If the heat exchange unit 31 is a structure installed on the cabinet 10 of the energy storage device 100, then the heat exchange unit 31 can be installed on the top or side of the cabinet 10 of the energy storage device 100, etc.

[0099] According to some embodiments of this application, referring to Figures 1 and 2, and further referring to Figures 3, 4, 5, 6, and 7, Figure 3 is a partial structural schematic diagram of the thermal management system 30 of the energy storage device 100 provided in some embodiments of this application; Figure 4 is a partial enlarged view of point A of the thermal management system 30 shown in Figure 3; Figure 5 is a structural schematic diagram of the thermal management component 32 of the thermal management system 30 provided in some embodiments of this application; Figure 6 is a simplified structural diagram of the thermal management system 30 of the energy storage device 100 provided in some embodiments of this application; and Figure 7 is a structural schematic diagram of the thermal management component 321 of the thermal management component 32 provided in some embodiments of this application. This application provides an energy storage device 100, which includes a cabinet 10, a battery device 21, a heat exchange unit 31, a thermal management component 32, and a commutation component 33. The battery device 21 is housed within the cabinet 10, and the battery device 21 includes a housing 211 and a plurality of battery cells 212 housed within the housing. The heat exchanger unit 31 provides a heat exchange medium and has a first outlet 311 for the heat exchange medium to flow out and a first inlet 312 for the heat exchange medium to flow into. The thermal management assembly 32 includes multiple thermal management components 321 configured to manage the temperature of the battery device 21. Each thermal management component 321 has a flow channel 3211 for the heat exchange medium to flow through it, and the flow channel 3211 has a first connection port 3212 and a second connection port 3213. Each thermal management component 321 forms a heat exchange loop with the heat exchanger unit 31. A reversing assembly 33 is disposed on the heat exchange loop and has a first state and a second state. The reversing assembly 33 is configured to: in the first state, connect the first outlet 311 and the first connection port 3212 and connect the first inlet 312 and the second connection port 3213; in the second state, connect the first outlet 311 and the second connection port 3213 and connect the first inlet 312 and the first connection port 3212.

[0100] In this embodiment, the cabinet 10 of the energy storage device 100 serves to house the battery device 21. The energy storage device 100 includes multiple battery packs 20, which are arranged along the second direction Y within the cabinet 10. Each battery pack 20 includes multiple battery devices 21, which are stacked along the first direction X. It should be noted that in an embodiment where only one battery device 21 is housed within the cabinet 10 of the energy storage device 100, each battery device 21 is provided with multiple thermal management components 321. These multiple thermal management components 321 can be located on one side of the battery device 21 in multiple directions, enabling heat exchange between multiple sides of the battery device 21. For example, the battery device 21 may have thermal management components 321 on both sides in the first direction X, both sides in the second direction Y, and both sides in the third direction Z.

[0101] The heat exchange unit 31 serves to provide the heat exchange medium. In other words, the heat exchange unit 31 can cool the heat exchange medium, enabling it to provide a cooled heat exchange medium to the thermal management component 321 and also to cool the heat exchange medium flowing out of the thermal management component 321. For example, the heat exchange unit 31 can be a water-cooled chiller or an air-cooled chiller, etc. The specific structure of the heat exchange unit 31 can be found in related technologies and will not be described in detail here.

[0102] For example, the heat exchange medium provided by the heat exchange unit 31 can be a gas, such as air or hydrogen, or a liquid, such as water, brine solution or liquid nitrogen.

[0103] The heat exchange unit 31 has a first outlet 311 from which the heat exchange medium flows out and a first inlet 312 from which the heat exchange medium flows in. That is, the first outlet 311 of the heat exchange unit 31 is the outlet from which the cooled heat exchange medium flows out, while the first inlet 312 is the inlet from which the heat exchange medium flowing out of the heat management component 321 of the heat exchange unit 31 flows in for cooling.

[0104] The thermal management assembly 32 includes a plurality of thermal management components 321, which are configured to manage the temperature of the battery device 21. In other words, the thermal management components 321 are components for exchanging heat with the battery device 21 to cool the battery device 21.

[0105] The heat management component 321 has an internal flow channel 3211 for the flow of the heat exchange medium. The flow channel 3211 has a first connecting port 3212 and a second connecting port 3213. That is, the heat management component 321 has an internal flow channel 3211, and the flow channel 3211 has a first connecting port 3212 and a second connecting port 3213 at its two ends for the inflow and outflow of the heat exchange medium, respectively. It should be noted that if the heat exchange medium flows into the first connecting port 3212, the heat exchange medium flows out through the second connecting port 3213; conversely, if the heat exchange medium flows out through the first connecting port 3212, the heat exchange medium flows into the second connecting port 3213. The specific structure of the heat management component 321 can be found in related technologies and will not be described in detail here.

[0106] Each thermal management component 321 forms a heat exchange loop with the heat exchange unit 31. That is, the first connection ports 3212 of the multiple thermal management components 321 of the thermal management assembly 32 are interconnected, either directly or indirectly. For example, the first connection ports 3212 of the multiple thermal management components 321 are all connected to the first conveying pipe 322, so that the first connection ports 3212 of the multiple thermal management components 321 of the thermal management assembly 32 are interconnected. Correspondingly, the second connection ports 3213 of the multiple thermal management components 321 of the thermal management assembly 32 are also interconnected. The second connection port 3213 of 321 is interconnected, and can be directly or indirectly connected. For example, the second connection ports 3213 of multiple heat management components 321 are all connected to the second delivery pipe 323, so that the second connection ports 3213 of multiple heat management components 321 of heat management assembly 32 are interconnected, so that the heat exchange medium flowing out of the flow channel 3211 of one heat management component 321 will directly return to the heat exchange unit 31, and will not flow into other heat management components 321. This ensures that the heat exchange medium flowing into the flow channel 3211 of each heat management component 321 is the heat exchange medium flowing out of the first outlet 311 of the heat exchange unit 31, and not the heat exchange medium flowing out of the flow channel 3211 of other heat management components 321.

[0107] For example, referring to Figures 5 and 6, the thermal management component 32 may further include a first delivery pipe 322 and a second delivery pipe 323. The first connection ports 3212 of the plurality of thermal management components 321 are all connected to the first delivery pipe 322, and the second connection ports 3213 of the plurality of thermal management components 321 are all connected to the second delivery pipe 323, so as to realize that the first connection ports 3212 of the plurality of thermal management components 321 of the thermal management component 32 are connected in parallel and the second connection ports 3213 of the plurality of thermal management components 321 of the thermal management component 32 are also connected in parallel.

[0108] The commutation assembly 33 is located on the heat exchange circuit, that is, the commutation assembly 33 is located between the thermal management component 321 and the heat exchange unit 31.

[0109] The commutation component 33 has a first state and a second state. The commutation component 33 is configured such that, in the first state, it connects the first outlet 311 and the first connecting port 3212, and also connects the first inlet 312 and the second connecting port 3213; in the second state, it connects the first outlet 311 and the second connecting port 3213, and also connects the first inlet 312 and the first connecting port 3212. That is, when the commutation component 33 switches from the first state to the second state or from the second state to the first state, it can change the flow path 3211 of the heat exchange medium within the heat management component 321. The flow direction is such that the heat exchange medium flows from the second connection port 3213 to the first connection port 3212 or from the first connection port 3212 to the second connection port 3213. It should be noted that when the reversing component 33 is in the first state, the heat exchange medium in the flow channel 3211 of the heat management component 321 flows from the first connection port 3212 to the second connection port 3213. When the reversing component 33 is in the second state, the heat exchange medium in the flow channel 3211 of the heat management component 321 flows from the second connection port 3213 to the first connection port 3212.

[0110] Optionally, the reversing assembly 33 can have various structures. For example, the reversing assembly 33 can be a two-position four-way valve disposed between the thermal management component 321 and the heat exchange unit 31. Correspondingly, the two position states of the two-position four-way valve are the first state and the second state of the reversing assembly 33, respectively. Of course, the reversing assembly 33 can also be two three-way valves disposed between the thermal management component 321 and the heat exchange unit 31, or it can be two sets of two-way valves disposed between the thermal management component 321 and the heat exchange unit 31, with each set of two-way valves including two two-way valves.

[0111] In this embodiment, the thermal management component 32 is provided with multiple thermal management parts 321. Each thermal management part 321 forms a heat exchange loop with the heat exchange unit 31, and a reversing component 33 is provided on the heat exchange loop. The reversing component 33 can realize the connection between the first outlet 311 and the first connecting port 3212 and between the first inlet 312 and the second connecting port 3213 when in the first state, and realize the connection between the first outlet 311 and the second connecting port 3213 and between the first inlet 312 and the first connecting port 3212 when in the second state, so as to realize the reversal of the heat exchange medium in the flow channel 3211 of the thermal management part 321. The energy storage device 100 with this structure can realize the parallel structure of multiple thermal management parts 321, which is beneficial to reduce the mutual influence of the heat exchange medium in the flow channel 3211 of multiple thermal management parts 321, and can realize the small temperature difference of the heat exchange medium in the flow channel 3211 of multiple thermal management parts 321. This effectively improves the heat exchange uniformity among multiple thermal management components 321. On the other hand, switching the flow direction of the heat exchange medium in the flow channel 3211 of the thermal management component 321 during the use of the energy storage device 100 can effectively alleviate the phenomenon that the temperature of the heat exchange medium at the first connection port 3212 of the thermal management component 321 is lower than that at the second connection port 3213, or the temperature of the heat exchange medium at the second connection port 3213 is lower than that at the first connection port 3212. This improves the phenomenon of excessive temperature difference in different areas of the thermal management component 321 during use, thereby alleviating the phenomenon of uneven heat exchange in the thermal management component 321. This enhances the effect of the thermal management component 32 in temperature management of the battery device 21, thereby improving the temperature consistency among multiple battery cells 212 in the battery device 21 or the temperature consistency of the battery cells 212 themselves, which is beneficial to improving the service life and performance of the energy storage device 100.

[0112] According to some embodiments of this application, referring to Figures 3, 4, 5, and 6, the reversing assembly 33 may include a first valve module 331 and a second valve module 332. The first valve module 331 has a second inlet 3311, a second outlet 3312, and a third outlet 3313. The second inlet 3311 communicates with the first outlet 311, and the second outlet 3312 and the third outlet 3313 are configured to selectively communicate with the second inlet 3311. The second valve module 332 has a fourth outlet 3321, a third inlet 3322, and a fourth inlet 3323. The fourth outlet 3321 communicates with the first inlet 312, and the third inlet 3322 and the fourth inlet 3323 are configured to selectively communicate with the fourth outlet 3321. The second outlet 3312 and the third inlet 3322 are both connected to a first connection port 3212, and the third outlet 3313 and the fourth inlet 3323 are both connected to the second connection port 3213.

[0113] Specifically, the second inlet 3311 of the first valve module 331 is connected to the first outlet 311 of the heat exchange unit 31, and the second outlet 3312 and the third outlet 3313 of the first valve module 331 are configured to be selectively connected to the second inlet 3311 of the first valve module 331, so that the second outlet 3312 and the third outlet 3313 of the first valve module 331 are selectively connected to the first outlet 311 of the heat exchange unit 31. That is, when the second outlet 3312 of the first valve module 331 is connected to the first outlet 311 of the heat exchange unit 31, the third outlet 3313 of the first valve module 331 is disconnected from the first outlet 311 of the heat exchange unit 31, and vice versa.

[0114] The fourth outlet 3321 of the second valve module 332 is connected to the first inlet 312 of the heat exchanger unit 31, and the third inlet 3322 and the fourth inlet 3323 of the second valve module 332 are configured to be selectively connected to the fourth outlet 3321 of the second valve module 332, so that the third inlet 3322 and the fourth inlet 3323 of the second valve module 332 are selectively connected to the first inlet 312 of the heat exchanger unit 31. That is, when the third inlet 3322 of the second valve module 332 is connected to the first inlet 312 of the heat exchanger unit 31, the fourth inlet 3323 of the second valve module 332 is disconnected from the first inlet 312 of the heat exchanger unit 31, and vice versa.

[0115] In this embodiment, both the second outlet 3312 and the third inlet 3322 are connected to the first connecting port 3212, and both the third outlet 3313 and the fourth inlet 3323 are connected to the second connecting port 3213. It should be noted that, referring to Figure 6, when the second outlet 3312 of the first valve module 331 is connected to the second inlet 3311 of the first valve module 331, and the third outlet 3313 of the first valve module 331 is disconnected from the second inlet 3311 of the first valve module 331, the second valve module 332... When the fourth inlet 3323 is connected to the fourth outlet 3321 of the second valve module 332, and the third inlet 3322 of the second valve 3315 is disconnected from the fourth outlet 3321 of the second valve module 332, the reversing assembly 33 is in the first state, so that the reversing assembly 33 can realize the connection between the first connection port 3212 of the thermal management component 321 and the first outlet 311 of the heat exchange unit 31, and the connection between the second connection port 3213 of the thermal management component 321 and the first inlet 312 of the heat exchange unit 31, so that the thermal management component... The heat exchange medium in the flow channel 3211 of 321 has a structure that allows the medium to flow from the first connecting port 3212 to the second connecting port 3213; the third outlet 3313 of the first valve module 331 is connected to the second inlet 3311 of the first valve module 331, and the second outlet 3312 of the first valve module 331 is disconnected from the second inlet 3311 of the first valve module 331; the third inlet 3322 of the second valve module 332 is connected to the fourth outlet 3321 of the second valve module 332, and the fourth outlet of the second valve 3315... When the inlet 3323 is disconnected from the fourth outlet 3321 of the second valve module 332, the reversing assembly 33 is in the second state, so that the reversing assembly 33 can realize the second connection port 3213 of the thermal management component 321 is connected to the first outlet 311 of the heat exchange unit 31, and the first connection port 3212 of the thermal management component 321 is connected to the first inlet 312 of the heat exchange unit 31, so that the heat exchange medium in the flow channel 3211 of the thermal management component 321 flows from the second connection port 3213 to the first connection port 3212.

[0116] In this embodiment, the first valve module 331 is provided with a second inlet 3311, a second outlet 3312, and a third outlet 3313. The second inlet 3311 is connected to the first outlet 311 of the heat exchanger unit 31. The second outlet 3312 and the third outlet 3313 can be selectively connected to the second inlet 3311. The second valve module 332 is provided with a fourth outlet 3321, a third inlet 3322, and a fourth inlet 3323. The fourth outlet 3321 is connected to the first inlet 312 of the heat exchanger unit 31. The third inlet 3322 and the fourth outlet 3323 are connected to the first outlet 3321 and the third outlet 3322 and the third outlet 3313. The inlet 3323 can be selectively connected to the fourth outlet 3321, so that the reversing component 33 has a first state that realizes the connection between the first outlet 311 and the first connection port 3212 and between the first inlet 312 and the second connection port 3213, and a second state that realizes the connection between the first outlet 311 and the second connection port 3213 and between the first inlet 312 and the first connection port 3212. Thus, the heat exchange medium can be reversed in the flow channel 3211 of the heat management component 321 through the reversing component 33. The structure is simple and easy to control.

[0117] In some embodiments, as shown in Figures 4 and 6, the first valve module 331 is a three-way valve. That is, the three connection ports of the three-way valve are the second inlet 3311, the second outlet 3312, and the third outlet 3313 of the first valve module 331.

[0118] For example, the first valve module 331 can be a manual three-way valve or an automatic three-way valve. Similarly, the structure of the first valve module 331 as a three-way valve can be various, such as a T-type three-way ball valve, a Y-type three-way ball valve, an L-type three-way ball valve, or a three-way butterfly valve.

[0119] In this embodiment, by setting the first valve module 331 as a three-way valve, the first valve module 331 has a second inlet 3311, a second outlet 3312 and a third outlet 3313, and the second outlet 3312 and the third outlet 3313 can be selectively connected to the second inlet 3311. The structure is simple and easy to assemble.

[0120] In some embodiments, referring to Figures 8 and 9, Figure 8 is a simplified structural diagram of the thermal management system 30 of the energy storage device 100 provided in some embodiments of this application, and Figure 9 is a simplified structural diagram of the first valve module 331 of the thermal management system 30 of the energy storage device 100 provided in some embodiments of this application. The first valve module 331 may include a first valve 3314 and a second valve 3315, both of which are two-way valves. The first valve 3314 has two first ports 3314a, and the second valve 3315 has two second ports 3315b. One first port 3314a of the first valve 3314 and one second port 3315b of the second valve 3315 are connected to form a second inlet 3311. The other first port 3314a of the first valve 3314 is a second outlet 3312, and the other second port 3315b of the second valve 3315 is a third outlet 3313.

[0121] In this configuration, a first port 3314a of the first valve 3314 and a second port 3315b of the second valve 3315 are connected to form a second inlet 3311. In other words, a first port 3314a of the first valve 3314 and a second port 3315b of the second valve 3315 are connected in parallel to form the second inlet 3311 of the first valve module 331.

[0122] Optionally, as shown in Figures 8 and 9, the first valve module 331 may further include a first tee pipe 3316, which has three first openings 3316a. Two of the three first openings 3316a are respectively connected to a first interface 3314a of the first valve 3314 and a first interface 3314a of the second valve 3315. The other first opening 3316a forms the second inlet 3311 of the first valve module 331, thereby reducing the difficulty of connecting a first interface 3314a of the first valve 3314 and a second interface 3315b of the second valve 3315 to form the second inlet 3311.

[0123] For example, the first valve 3314 can be a manual two-way valve or an automatic two-way valve. Similarly, the structure of the first valve 3314 as a two-way valve can also be various, such as a two-way ball valve, a two-way shut-off valve, a two-way butterfly valve, etc.

[0124] For example, the second valve 3315 can be a manual two-way valve or an automatic two-way valve. Similarly, the structure of the second valve 3315 as a two-way valve can also be various, such as a two-way ball valve, a two-way shut-off valve, a two-way butterfly valve, etc.

[0125] In this embodiment, the first valve module 331 is provided with a first valve 3314 and a second valve 3315, both of which are two-way valves. By connecting one first port 3314a of the first valve 3314 and one second port 3315b of the second valve 3315, a second inlet 3311 of the first valve module 331 is formed. The other first port 3314a of the first valve 3314 and the other second port 3315b of the second valve 3315 are respectively the second outlet 3312 and the third outlet 3313 of the first valve module 331, so that the second outlet 3312 and the third outlet 3313 can be selectively connected to the second inlet 3311. The structure is simple and can reduce the mutual influence between the second outlet 3312 and the third outlet 3313, which is beneficial to improving the stability of the first valve module 331 in use.

[0126] In some embodiments, as shown in Figures 4 and 6, the second valve module 332 is a three-way valve. That is, the three connection ports of the three-way valve are the second inlet 3311, the second outlet 3312, and the third outlet 3313 of the second valve module 332.

[0127] For example, the second valve module 332 can be a manual three-way valve or an automatic three-way valve. Similarly, the structure of the second valve module 332 as a three-way valve can be various, such as a T-type three-way ball valve, a Y-type three-way ball valve, an L-type three-way ball valve, or a three-way butterfly valve.

[0128] In this embodiment, by setting the second valve module 332 as a three-way valve, the second valve module 332 has a fourth outlet 3321, a third inlet 3322 and a fourth inlet 3323, and the third inlet 3322 and the fourth inlet 3323 can be selectively connected to the fourth outlet 3321. The structure is simple and easy to assemble.

[0129] In some embodiments, referring to FIG8 and further referring to FIG10, FIG10 is a simplified structural diagram of the second valve module 332 of the thermal management system 30 of the energy storage device 100 provided in some embodiments of the present application. The second valve module 332 may include a third valve 3324 and a fourth valve 3325, both of which are two-way valves. The third valve 3324 has two third ports 3324a, and the fourth valve 3325 has two fourth ports 3325a. One third port 3324a of the third valve 3324 and one fourth port 3325a of the fourth valve 3325 are connected to form a fourth outlet 3321. The other third port 3324a of the third valve 3324 is a third inlet 3322, and the other fourth port 3325a of the fourth valve 3325 is a fourth inlet 3323.

[0130] Among them, a third port 3324a of the third valve 3324 and a fourth port 3325a of the fourth valve 3325 are connected to form a fourth outlet 3321. That is to say, a third port 3324a of the third valve 3324 and a fourth port 3325a of the fourth valve 3325 are connected in parallel to form the fourth outlet 3321 of the second valve module 332.

[0131] Optionally, as shown in Figures 8 and 10, the second valve module 332 may further include a second tee pipe 3326, which has three second openings 3326a. Two of the three second openings 3326a are respectively connected to a third interface 3324a of the third valve 3324 and a fourth interface 3325a of the fourth valve 3325. The other second opening 3326a forms the fourth outlet 3321 of the second valve module 332, thereby reducing the difficulty of connecting a third interface 3324a of the third valve 3324 and a fourth interface 3325a of the fourth valve 3325 to form the fourth outlet 3321.

[0132] For example, the third valve 3324 can be a manual two-way valve or an automatic two-way valve. Similarly, the structure of the third valve 3324 as a two-way valve can also be various, such as a two-way ball valve, a two-way shut-off valve, a two-way butterfly valve, etc.

[0133] For example, the fourth valve 3325 can be a manual two-way valve or an automatic two-way valve. Similarly, the structure of the fourth valve 3325 as a two-way valve can also be various, such as a two-way ball valve, a two-way stop valve, a two-way butterfly valve, etc.

[0134] In this embodiment, the second valve module 332 is provided with a third valve 3324 and a fourth valve 3325, both of which are two-way valves. By connecting one third port 3324a of the third valve 3324 and one fourth port 3325a of the fourth valve 3325, a fourth outlet 3321 of the second valve module 332 is formed. The other third port 3324a of the third valve 3324 and the other fourth port 3325a of the fourth valve 3325 are respectively the third inlet 3322 and the fourth inlet 3323 of the second valve module 332, so that the third inlet 3322 and the fourth inlet 3323 can be selectively connected to the fourth outlet 3321. The structure is simple and can reduce the mutual influence between the third inlet 3322 and the fourth inlet 3323, which is beneficial to improving the stability of the second valve module 332.

[0135] According to some embodiments of this application, as shown in Figures 4 and 6, both the first valve module 331 and the second valve module 332 are three-way ball valves. The specific structure of the three-way ball valve can be found in related technologies and will not be repeated here.

[0136] In this embodiment, by setting both the first valve module 331 and the second valve module 332 as three-way ball valves, the flow direction of the heat exchange medium in the flow channel 3211 of the heat management component 321 can be switched by the reversing component 33, while the adjustment angle of the first valve module 331 and the second valve module 332 can be made more flexible. This reduces the difficulty of switching the flow direction of the heat exchange medium by the reversing component 33, and also allows for the regulation of the flow rate of the heat exchange medium.

[0137] According to some embodiments of this application, referring to Figures 3, 4, 5, and 6, the thermal management assembly 32 may further include a first delivery pipe 322 and a second delivery pipe 323. The first connection ports 3212 of a plurality of thermal management components 321 are all connected to the first delivery pipe 322, and the second connection ports 3213 of a plurality of thermal management components 321 are all connected to the second delivery pipe 323. The reversing assembly 33 is configured to: in a first state, connect the first outlet 311 and the first delivery pipe 322 and connect the first inlet 312 and the second delivery pipe 323; in a second state, connect the first outlet 311 and the second delivery pipe 323 and connect the first inlet 312 and the first delivery pipe 322.

[0138] In this configuration, the first connection ports 3212 of multiple thermal management components 321 are all connected to the first delivery pipe 322, meaning that the first connection ports 3212 of multiple thermal management components 321 are connected in parallel through the first delivery pipe 322. The second connection ports 3213 of multiple thermal management components 321 are all connected to the second delivery pipe 323, meaning that the second connection ports 3213 of multiple thermal management components 321 are connected in parallel through the second delivery pipe 323.

[0139] Optionally, referring to Figure 6, in an embodiment where the energy storage device 100 includes a first valve module 331 and a second valve module 332, the commutation assembly 33 may further include a first connecting pipe 333, a second connecting pipe 334, a third connecting pipe 335, and a fourth connecting pipe 336. The first connecting pipe 333 connects the second outlet 3312 and the first delivery pipe 322, the second connecting pipe 334 connects the third outlet 3313 and the second delivery pipe 323, the third connecting pipe 335 connects the third inlet 3322 and the first delivery pipe 322, and the fourth connecting pipe 336 connects the fourth inlet 3323 and the second delivery pipe 323, so as to reduce the assembly difficulty between the commutation assembly 33 and the thermal management assembly 32.

[0140] In this embodiment, the thermal management component 32 is provided with a first delivery pipe 322 and a second delivery pipe 323. The first delivery pipe 322 is connected to the first connection port 3212 of the multiple thermal management components 321, and the second delivery pipe 323 is connected to the second connection port 3213 of the multiple thermal management components 321, so as to realize the parallel connection between the multiple thermal management components 321. In this embodiment, by setting the reversing component 33 to connect the first outlet 311 and the first delivery pipe 322 and the first inlet 312 and the second delivery pipe 323 in the first state, and to connect the first outlet 311 and the second delivery pipe 323 and the first inlet 312 and the first delivery pipe 322 in the second state, the reversing component 33 can simultaneously switch the flow direction of the heat exchange medium in the flow channel 3211 of the multiple thermal management components 321, so as to facilitate control and assembly.

[0141] In some embodiments, referring to Figures 1 and 5, the energy storage device 100 may include a plurality of battery packs 20, each battery pack 20 including a plurality of battery devices 21 arranged along a first direction X, and the plurality of battery packs 20 arranged along a second direction Y, which is perpendicular to the first direction X. The energy storage device 100 includes a plurality of thermal management components 32, each corresponding to one of the battery packs 20.

[0142] It should be noted that the multiple battery devices 21 within the energy storage device 100 form multiple battery clusters connected in parallel. That is, the energy storage device 100 includes multiple battery clusters, which are arranged in parallel, and each battery cluster includes multiple battery devices 21 connected in series. Correspondingly, each battery cluster may include only one battery pack 20. In other words, each battery pack 20 is a battery cluster, and the multiple battery devices 21 in each battery pack 20 are connected in series, while the multiple battery packs 20 are connected in parallel. Of course, in some embodiments, each battery cluster may also include multiple battery packs 20, that is, the multiple battery devices 21 in the multiple battery packs 20 in a battery cluster are connected in series.

[0143] In this embodiment, the energy storage device 100 is provided with multiple battery packs 20, and each battery pack 20 is provided with multiple battery devices 21 arranged along the first direction X, thereby increasing the capacity of the energy storage device 100. By providing a thermal management component 32 for each battery pack 20, the capacity of the energy storage device 100 can be increased while the temperature of the multiple battery devices 21 in each battery pack 20 can be easily managed, thereby reducing the temperature rise of the energy storage device 100 during use, which is beneficial to improving the reliability of the energy storage device 100 and reducing the assembly difficulty of the energy storage device 100.

[0144] According to some embodiments of this application, as shown in Figures 1, 4 and 6, the energy storage device 100 includes a plurality of commutation components 33, and each thermal management component 32 is connected to the heat exchange unit 31 through a commutation component 33.

[0145] Each thermal management component 32 is connected to the heat exchange unit 31 through a reversing component 33. That is, a reversing component 33 is provided between each thermal management component 32 and the heat exchange unit 31, so that each reversing component 33 can switch the flow direction of the heat exchange medium in the first delivery pipe 322 and the second delivery pipe 323 of the corresponding thermal management component 32, so as to simultaneously switch the flow direction of the heat exchange medium in the flow channel 3211 of each thermal management component 321 of the corresponding thermal management component 32.

[0146] Optionally, referring to Figures 4 and 6, the thermal management system 30 of the energy storage device 100 may further include a first pipeline 34 and a second pipeline 35. Both the first pipeline 34 and the second pipeline 35 are respectively configured to correspond one-to-one with the reversing assembly 33. One end of the first pipeline 34 is connected to the first outlet 311 of the heat exchanger unit 31, and the other end is connected to the reversing assembly 33. Correspondingly, one end of the second pipeline 35 is connected to the first inlet 312 of the heat exchanger unit 31, and the other end is connected to the reversing assembly 33. It should be noted that in embodiments where the reversing assembly 33 includes a first valve module 331 and a second valve module 332, the second inlet 3311 of the first valve module 331 is connected to the first pipeline 34, such that the first... The second inlet 3311 of the valve module 331 is connected to the first outlet 311 of the heat exchange unit 31 through the first pipe 34. Correspondingly, the fourth outlet 3321 of the second valve module 332 is connected to the second pipe 35, so that the fourth outlet 3321 of the second valve module 332 is connected to the first inlet 312 of the heat exchange unit 31 through the second pipe 35. Similarly, the second outlet 3312 of the first valve module 331 and the third inlet 3322 of the second valve module 332 are both connected to the first conveying pipe 322, and the third outlet 3313 of the first valve module 331 and the fourth inlet 3323 of the second valve module 332 are both connected to the second conveying pipe 323.

[0147] In this embodiment, the energy storage device 100 is provided with a plurality of commutation components 33, and each commutation component 33 is provided with a corresponding thermal management component 32, so that the flow direction switching of the heat exchange medium in the flow channel 3211 of the thermal management component 321 of each thermal management component 32 is controlled by the corresponding commutation component 33, thereby making each thermal management component 32 a structure that is independently controlled by the corresponding commutation component 33, so as to realize that the flow direction switching of the heat exchange medium among the plurality of thermal management components 32 does not affect each other.

[0148] In some embodiments, the energy storage device 100 may further include multiple first detection modules and multiple first control modules, with each first detection module, first control module, commutation component 33, and thermal management component 32 corresponding to one another. Each first control module is electrically connected to the corresponding first detection module and the corresponding commutation component 33. The first detection module is used to detect the first temperature of the heat exchange medium in the first delivery pipe 322 and the second temperature of the heat exchange medium in the second delivery pipe 323 of the corresponding thermal management component 32. The first control module is configured to control the corresponding commutation component 33 to switch between the first state and the second state when the difference between the first temperature and the second temperature is greater than a first preset value.

[0149] The first detection module is used to detect the first temperature of the heat exchange medium in the first delivery pipe 322 and the second temperature of the heat exchange medium in the second delivery pipe 323 of the corresponding thermal management component 32. The first detection module consists of two first temperature detection elements respectively set on the first delivery pipe 322 and the second delivery pipe 323, so that the two first temperature detection elements are used to detect the first temperature of the heat exchange medium in the first delivery pipe 322 and the second temperature of the heat exchange medium in the second delivery pipe 323. The structure of the first temperature detection element can be various, such as a temperature probe, a temperature sensor or a temperature measuring electronic thermometer.

[0150] The first control module is responsible for controlling the operation of the commutation component 33 after comparing the difference between the first temperature and the second temperature with a first preset value. The specific structure of the first control module can be found in relevant technologies, and will not be described in detail here.

[0151] For example, the first preset value is 3 degrees Celsius.

[0152] In this embodiment, the energy storage device 100 is further provided with multiple first detection modules and multiple first control modules, and the first control modules, commutation components 33 and thermal management components 32 are all one-to-one corresponding structures. The first detection modules can detect the first temperature of the heat exchange medium in the first delivery pipe 322 and the second temperature of the heat exchange medium in the second delivery pipe 323 of the corresponding thermal management component 32. This allows the first control module to control the corresponding commutation component 33 to switch between the first state and the second state according to the detection results of the corresponding first detection modules. This enables the automatic switching of the state of the commutation component 33 according to the actual usage of the thermal management component 321, thereby further improving the automation level of the commutation component 33 and further improving the phenomenon of excessive temperature difference in different areas of the thermal management component 321 during use. This further alleviates the phenomenon of uneven heat exchange in the thermal management component 321, and further improves the effect of the thermal management component 32 in temperature management of the battery device 21, which is conducive to further improving the service life and performance of the energy storage device 100.

[0153] Of course, in some embodiments, the energy storage device 100 may have other structures. Please refer to Figure 11, which is a structural schematic diagram of the energy storage device 100 provided in some embodiments of this application. The thermal management system 30 of the energy storage device 100 may further include a first pipeline 34 and a second pipeline 35. The first delivery pipes 322 of the plurality of thermal management components 32 are all connected to the first pipeline 34, and the second delivery pipes 323 of the plurality of thermal management components 32 are all connected to the second pipeline 35. The first pipeline 34 and the second pipeline 35 are connected to the heat exchange unit 31 through a reversing component 33. The reversing component 33 is configured to: in a first state, connect the first outlet 311 and the first pipeline 34 and connect the first inlet 312 and the second pipeline 35; in a second state, connect the first outlet 311 and the second pipeline 35 and connect the first inlet 312 and the first pipeline 34.

[0154] In this configuration, the first delivery pipes 322 of the multiple thermal management components 32 are all connected to the first pipeline 34, meaning that the first delivery pipes 322 of the multiple thermal management components 32 are connected in parallel through the first pipeline 34. The second delivery pipes 323 of the multiple thermal management components 32 are all connected to the second pipeline 35, meaning that the second delivery pipes 323 of the multiple thermal management components 32 are connected in parallel through the second pipeline 35.

[0155] The first pipeline 34 and the second pipeline 35 are connected to the heat exchange unit 31 through a reversing assembly 33. That is, the reversing assembly 33 is a structure that is disposed between the first pipeline 34 and the heat exchange unit 31 and between the second pipeline 35 and the heat exchange unit 31, so that one reversing assembly 33 can switch the flow direction of the heat exchange medium in the first pipeline 34 and the second pipeline 35, so as to simultaneously switch the flow direction of the heat exchange medium in the flow channel 3211 of each heat management component 321. That is, the first pipeline 34 and the second pipeline 35 are connected to the first outlet 311 and the first inlet 312 of the heat exchange unit 31 through a reversing assembly 33.

[0156] It should be noted that in the embodiment where the reversing assembly 33 includes a first valve module 331 and a second valve module 332, the second outlet 3312 of the first valve module 331 and the third inlet 3322 of the second valve module 332 are both connected to the first pipeline 34, and the third outlet 3313 of the first valve module 331 and the fourth inlet 3323 of the second valve module 332 are both connected to the second pipeline 35.

[0157] In this embodiment, the first pipeline 34 of the energy storage device 100 is connected to the first delivery pipeline 322 of the multiple thermal management components 32, and the second pipeline 35 of the energy storage device 100 is connected to the second delivery pipeline 323 of the multiple thermal management components 32, so that the multiple thermal management components 32 are connected in parallel through the first pipeline 34 and the second pipeline 35. By setting the first pipeline 34 and the second pipeline 35 to be connected to the heat exchange unit 31 through a reversing component 33, the reversing component 33 can connect the first outlet 311 and the first pipeline 34 and the first inlet 312 and the second pipeline 35 in the first state, and can connect the first outlet 311 and the second pipeline 35 and the first inlet 312 and the first pipeline 34 in the second state. In this way, the flow direction of the heat exchange medium in the flow channel 3211 of the thermal management component 321 of the multiple thermal management components 32 can be switched simultaneously through a reversing component 33. The structure is simple and easy to control and operate.

[0158] In some embodiments, the energy storage device 100 may further include a second detection module and a second control module, the second control module being electrically connected to the second detection module and the commutation assembly 33. The second detection module is used to detect a third temperature of the heat exchange medium in the first pipeline 34 and a fourth temperature of the heat exchange medium in the second pipeline 35, and the second control module is configured to control the commutation assembly 33 to switch between a first state and a second state when the difference between the third temperature and the fourth temperature is greater than a second preset value.

[0159] The second detection module is used to detect the third temperature of the heat exchange medium in the first pipe 34 and the fourth temperature of the heat exchange medium in the second pipe 35. The second detection module consists of two second temperature detection elements respectively installed on the first pipe 34 and the second pipe 35, so that the two second temperature detection elements are used to detect the third temperature of the heat exchange medium in the first pipe 34 and the fourth temperature of the heat exchange medium in the second pipe 35. The structure of the second temperature detection element can be various, such as a temperature probe, a temperature sensor or a temperature measuring electronic thermometer.

[0160] The second control module is responsible for controlling the operation of the commutation component 33 after comparing the difference between the third and fourth temperatures with the second preset value. The specific structure of the second control module can be found in the relevant technology, and will not be described in detail here.

[0161] For example, the second preset value is 5 degrees Celsius.

[0162] In this embodiment, the energy storage device 100 is further provided with a second detection module and a second control module. The second detection module can detect the third temperature of the heat exchange medium in the first pipeline 34 and the fourth temperature of the heat exchange medium in the second pipeline 35. The second control module can control the commutation component 33 to switch between the first state and the second state according to the detection results of the corresponding second detection module. This enables the automatic switching of the state of the commutation component 33 according to the actual usage of the thermal management component 32, thereby further improving the automation level of the commutation component 33 and further improving the phenomenon of excessive temperature difference in different areas of the thermal management component 321 during use. This further alleviates the phenomenon of uneven heat exchange in the thermal management component 321, thereby further improving the effect of the thermal management component 32 in temperature management of the battery device 21, which is conducive to further improving the service life and performance of the energy storage device 100.

[0163] Of course, the structure of the energy storage device 100 is not limited to this. In other embodiments, the energy storage device 100 can also have other structures. For example, please refer to Figure 12, which is a schematic diagram of the structure of the energy storage device 100 provided in some embodiments of this application. The energy storage device 100 includes a plurality of commutation components 33, each of which corresponds to a thermal management component 321. Each thermal management component 321 is connected to the heat exchange unit 31 through a commutation component 33.

[0164] Each thermal management component 321 is connected to the heat exchange unit 31 through a reversing assembly 33. That is, each thermal management component 321 of each thermal management component 32 is provided with a corresponding reversing assembly 33, so that each reversing assembly 33 can only switch the flow direction of the heat exchange medium in the flow channel 3211 of the corresponding thermal management component 321.

[0165] It should be noted that in the embodiment where the thermal management component 32 includes a first delivery pipe 322 and a second delivery pipe 323, and the first connection ports 3212 of multiple thermal management components 321 are all connected to the first delivery pipe 322, and the second connection ports 3213 of multiple thermal management components 321 are all connected to the second delivery pipe 323, then the reversing component 33 is a structure disposed between the thermal management component 321 and the first delivery pipe 322 and between the thermal management component 321 and the second delivery pipe 323. In the embodiment where the reversing component 33 includes a first valve module 331 and a second delivery pipe 322, the reversing component 33 is a structure disposed between the thermal management component 321 and the first delivery pipe 322 and between the thermal management component 321 and the second delivery pipe 323. In the embodiment of the two valve module 332, the second inlet 3311 of the first valve module 331 is connected to the first conveying pipe 322, so that the second inlet 3311 of the first valve module 331 is connected to the first outlet 311 of the heat exchange unit 31 through the first conveying pipe 322. Correspondingly, the fourth outlet 3321 of the second valve module 332 is connected to the second conveying pipe 323, so that the fourth outlet 3321 of the second valve module 332 is connected to the first inlet 312 of the heat exchange unit 31 through the second conveying pipe 323.

[0166] In this embodiment, the energy storage device 100 is provided with a plurality of commutation components 33, and each thermal management component 321 is provided with a corresponding commutation component 33, so that the flow direction switching of the heat exchange medium in the flow channel 3211 of each thermal management component 321 is controlled by the corresponding commutation component 33, thereby making each thermal management component 321 a structure that is independently controlled by the corresponding commutation component 33, so that the flow direction switching of the heat exchange medium among the plurality of thermal management components 321 does not affect each other.

[0167] In some embodiments, the energy storage device 100 may further include multiple third detection modules and multiple third control modules. The third detection modules, third control modules, commutation components 33, and thermal management components 321 correspond one-to-one. Each third control module is electrically connected to its corresponding third detection module and its corresponding commutation component 33. The third detection module is used to detect a fifth temperature and a sixth temperature of the heat exchange medium at the first connection port 3212 of the corresponding thermal management component 321. The third control module is configured to control the corresponding commutation component 33 to switch between a first state and a second state when the difference between the fifth temperature and the sixth temperature is greater than a third preset value.

[0168] The third detection module is used to detect the fifth temperature and the sixth temperature of the heat exchange medium at the first connection port 3212 of the corresponding thermal management component 321. The third detection module consists of two third temperature detection elements respectively set at the first connection port 3212 and the second connection port 3213 of the thermal management component 321, so that the two third temperature detection elements are used to detect the fifth temperature and the sixth temperature of the heat exchange medium at the first connection port 3212, respectively. The structure of the third temperature detection element can be various, such as a temperature probe, a temperature sensor, or a temperature measuring electronic thermometer.

[0169] The third control module is responsible for controlling the operation of the commutation component 33 after comparing the difference between the fifth and sixth temperatures with the third preset value. The specific structure of the third control module can be found in the relevant technology, and will not be described in detail here.

[0170] For example, the third preset value is 2 degrees Celsius.

[0171] In this embodiment, the energy storage device 100 is further provided with multiple third detection modules and multiple third control modules. The third control modules, commutation components 33, and thermal management components 321 are all one-to-one corresponding structures. The third detection modules can detect the fifth temperature and the sixth temperature of the heat exchange medium at the first connection port 3212 of the corresponding thermal management component 321. This allows the third control modules to control the corresponding commutation components 33 to switch between the first and second states based on the detection results of the corresponding third detection modules. This enables the automatic switching of the state of the commutation components 33 according to the actual usage of the thermal management components 321, thereby further improving the automation level of the commutation components 33 and further improving the phenomenon of excessive temperature difference in different areas of the thermal management components 321 during use. This further alleviates the phenomenon of uneven heat exchange in the thermal management components 321, thereby further improving the effect of the thermal management components 321 in temperature management of the battery device 21, which is beneficial to further improving the service life and performance of the energy storage device 100.

[0172] According to some embodiments of this application, referring to Figures 1 and 2, the battery device 21 may further include a housing 211, in which a plurality of battery cells 212 are housed, and the plurality of battery cells 212 are arranged in a manner along the second direction Y and the third direction Z. A thermal management component 321 is provided on at least one side of the battery device 21 along the first direction X, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0173] In this configuration, multiple battery cells 212 are arranged in the second direction Y and the third direction Z. That is, the housing 211 of the battery device 21 contains multiple rows of battery cells 212 arranged along the second direction Y. Each row of battery cells 212 includes multiple battery cells 212 arranged along the third direction Z, such that the orthographic projection of the multiple battery cells 212 in the plane perpendicular to the first direction X is a non-overlapping structure.

[0174] In this embodiment, the multiple battery cells 212 of the battery device 21 are arranged in a structure along the second direction Y and the third direction Z within the housing 211. By providing a thermal management component 321 on at least one side of the battery device 21 along the first direction X, the thermal management component 321 can be correspondingly arranged with the multiple battery cells 212 within the housing 211 of the battery device 21. This facilitates heat exchange between the thermal management component 321 and the multiple battery cells 212 within the battery device 21, which is beneficial to further improve the heat exchange effect between the thermal management component 321 and the battery device 21.

[0175] In some embodiments, referring to FIG1, the energy storage device 100 includes a battery pack 20, the battery pack 20 including a plurality of battery devices 21 arranged along a first direction X, and each battery device 21 having a thermal management component 321 disposed on at least one side in the first direction X.

[0176] For example, the plurality of battery devices 21 in each battery pack 20 are arranged at intervals along the first direction X, and at least one thermal management component 321 is provided between each pair of adjacent battery devices 21.

[0177] In this embodiment, the battery pack 20 of the energy storage device 100 is provided with a plurality of battery devices 21 arranged along the first direction X, and each battery device 21 is provided with a thermal management component 321 on at least one side in the first direction X. This can improve the heat exchange effect of the thermal management component 32 on the plurality of battery devices 21, which is beneficial to reduce the temperature rise of the energy storage device 100 during use. On the other hand, it can optimize the internal structural layout of the energy storage device 100 and reduce the assembly difficulty between the battery devices 21 and the thermal management component 321.

[0178] In some embodiments, the thermal management component 321 corresponds one-to-one with the battery device 21, and the thermal management component 321 is provided at the bottom of the battery device 21.

[0179] For example, in FIG1, each battery device 21 is provided with at least one thermal management component 321 at its bottom in the first direction X.

[0180] It should be noted that a thermal management component 321 is provided at the bottom of the battery device 21, that is, a thermal management component 321 is provided at the bottom of the battery device 21 in the direction of gravity.

[0181] In this embodiment, by placing the thermal management component 321 at the bottom of the battery device 21 in the first direction X, the thermal management component 321 can provide some support for the battery device 21 to improve structural stability. On the other hand, it can realize the battery device 21 as a bottom heat exchange structure, which is beneficial to improving the heat exchange effect between the thermal management component 321 and the battery device 21.

[0182] In some embodiments, along the first direction X, the projection of the battery device 21 is located within the corresponding thermal management component 321, that is, in the same plane perpendicular to the first direction X, the orthographic projection of the battery device 21 is located within the orthographic projection of the corresponding thermal management component 321, that is, each thermal management component 321 covers the corresponding battery device 21 in the first direction X.

[0183] In this embodiment, by setting the projection of the battery device 21 in the first direction X to be located within the thermal management component 321, the multiple battery cells 212 in the battery device 21 can correspond to at least a portion of the thermal management component 321 in the first direction X, and the thermal management component 321 is aligned with the entire battery device 21 in the first direction X. This further improves the heat exchange effect between the thermal management component 321 and the battery device 21, which is beneficial to improving the service life and performance of the energy storage device 100.

[0184] According to some embodiments of this application, referring to FIG2, in a projection plane perpendicular to the first direction X, the area defined by the outer contours of the orthographic projections of a plurality of battery cells 212 is greater than or equal to 0.48m². 2 .

[0185] For example, the area defined by the outer contour of the orthographic projection of the plurality of battery cells 212 in a projection plane perpendicular to the first direction X can be 0.48m². 2 0.49m 2 0.5m 2 0.51m 2 0.52m 2 0.53m 2 0.54m 2 0.55m 2 0.58m 2 0.6m 2 0.65m 2 0.7m 2 0.75m 2 0.8m2 0.85m 2 0.9m 2 0.95m 2 1m 2 1.05m 2 or 1.1m 2 wait.

[0186] In this embodiment, the area defined by the outer contour of the projection of the plurality of battery cells 212 in the first direction X is set to be greater than or equal to 0.48m². 2 This increases the number of battery cells 212 that can be accommodated in the housing 211 of the battery device 21, thereby achieving a large-capacity battery device 21. This increases the overall capacity of the energy storage device 100, and while increasing the capacity of the energy storage device 100, it also alleviates the phenomenon of uneven heat exchange in the thermal management component 321. This improves the temperature management effect of the thermal management component 32 on the battery device 21, which is beneficial to improving the service life and performance of the large-capacity energy storage device 100.

[0187] According to some embodiments of this application, the capacity of the battery cell 212 is greater than or equal to 200Ah.

[0188] Among them, the capacity of battery cell 212 refers to the amount of electricity stored in battery cell 212.

[0189] For example, the capacity of the battery cell 212 can be 200Ah, 210Ah, 220Ah, 221Ah, 222Ah, 225Ah, 228Ah, 230Ah, 235Ah, 240Ah, 245Ah, 250Ah, 260Ah, 270Ah, 280Ah, 300Ah, 310Ah, 320Ah, 330Ah, 340Ah, 350Ah, 380Ah, 400Ah, 450Ah, 500Ah, 550Ah, 600Ah, or 650Ah. h, 700Ah, 750Ah, 800Ah, 850Ah, 900Ah, 950Ah, 1000Ah, 1100Ah, 1200Ah, 1300Ah, 1400Ah, 1500Ah, 1600Ah, 1700Ah , 1800Ah, 1900Ah, 2000Ah, 2100Ah, 2200Ah, 2300Ah, 2400Ah, 2500Ah, 2600Ah, 2700Ah, 2800Ah, 2900Ah or 3000Ah, etc.

[0190] It should be noted that the capacity of a single 212 battery cell can be obtained by testing as follows:

[0191] At 25°C, battery cell 212 is left to stand for 5 minutes, then discharged at a constant current of 0.33C to the lower cutoff voltage. After standing for 5 minutes, it is charged at a constant current of 0.33C to the upper cutoff voltage, and then charged at a constant voltage at the upper cutoff voltage until the current is 0.05C. After standing for 5 minutes, it is discharged at a constant current of 0.33C to the lower cutoff voltage. The discharge capacity at this time is recorded, which is the capacity of battery cell 212.

[0192] The upper and lower cutoff voltages can be the charge / discharge voltages recommended in the product specifications of battery cell 212. For example, when the positive electrode active material includes lithium iron phosphate and the negative electrode active material includes graphite, the upper cutoff voltage of battery cell 212 can be 3.65V and the lower cutoff voltage can be 2.5V.

[0193] In this embodiment, by setting the capacity of the battery cell 212 to be greater than or equal to 200Ah, a large-capacity battery device 21 is achieved, thereby increasing the overall capacity of the energy storage device 100. This not only increases the capacity of the energy storage device 100 but also alleviates the uneven heat exchange phenomenon of the thermal management component 321, thereby improving the temperature management effect of the thermal management component 32 on the battery device 21. This is beneficial to improving the service life and performance of the large-capacity energy storage device 100.

[0194] According to some embodiments of this application, referring to Figures 1 to 7, this application provides an energy storage device 100, which includes a cabinet 10, a battery pack 20, and a thermal management system 30. Multiple battery packs 20 are arranged along a second direction Y within the cabinet 10. Each battery pack 20 includes multiple battery devices 21 arranged along a first direction X. Each battery device 21 includes a housing 211 and multiple battery cells 212 housed within the housing 211. The battery cells 212 are arranged in a specific order along the second direction Y and a third direction Z, i.e., the battery device 21 includes multiple rows of battery cells 212 arranged along the second direction Y, and each row of battery cells 212 includes multiple battery cells 212 arranged along the third direction Z. The second direction Y, the third direction Z, and the first direction X are mutually perpendicular. The thermal management system 30 includes a heat exchanger unit 31, a thermal management component 32, a commutation component 33, a first pipeline 34, and a second pipeline 35. The heat exchanger unit 31 is used to provide the heat exchange medium. The heat exchanger unit 31 has a first outlet 311 for the heat exchange medium to flow out and a first inlet 312 for the heat exchange medium to flow in. The thermal management assembly 32 includes a plurality of thermal management components 321, a first conveying pipe 322 and a second conveying pipe 323. The thermal management components 321 correspond one-to-one with the battery devices 21. Along the first direction X, the bottom of each battery device 21 is provided with a thermal management component 321, and the projection of the battery device 21 is located within the corresponding thermal management component 321. The thermal management component 321 is configured to manage the temperature of the battery device 21. The interior of the thermal management component 321 has a flow channel 3211 for the flow of the heat exchange medium. The flow channel 3211 has a first connection port 3212 and a second connection port 3213. The first connection ports 3212 of the multiple thermal management components 321 are all connected to the first delivery pipe 322, and the second connection ports 3213 of the multiple thermal management components 321 are all connected to the second delivery pipe 323. Each thermal management component 321 forms a heat exchange loop with the heat exchange unit 31.A reversing assembly 33 is disposed on the heat exchange circuit. The reversing assembly 33 includes a first valve module 331 and a second valve module 332. The first valve module 331 is a three-way valve and has a second inlet 3311, a second outlet 3312, and a third outlet 3313. The second inlet 3311 is connected to the first outlet 311 through a first pipe 34. The second outlet 3312 and the third outlet 3313 are configured to be selectively connected to the second inlet 3311. The second valve module 332 is a three-way valve and has a fourth outlet 3321, a third inlet 3322, and a fourth inlet 3323. The fourth outlet 3321 is connected to the second pipe 35. The first inlet 312 is connected to the second outlet 3321. The third inlet 3322 and the fourth inlet 3323 are configured to be selectively connected to the fourth outlet 3321. The second outlet 3312 and the third inlet 3322 are both connected to the first conveying pipe 322, and the third outlet 3313 and the fourth inlet 3323 are both connected to the second conveying pipe 323. The reversing assembly 33 has a first state and a second state. The reversing assembly 33 is configured to: in the first state, connect the first outlet 311 and the first conveying pipe 322 and connect the first inlet 312 and the second conveying pipe 323; in the second state, connect the first outlet 311 and the second conveying pipe 323 and connect the first inlet 312 and the first conveying pipe 322. There are multiple thermal management assemblies 32 and reversing assemblies 33, and each thermal management assembly 32 corresponds one-to-one with the battery pack 20. Each thermal management assembly 32 is connected to the heat exchange unit 31 through a reversing assembly 33. The energy storage device 100 also includes multiple first detection modules and multiple first control modules. The first detection modules, first control modules, commutation components 33 and thermal management components 32 correspond one-to-one. Each first control module is electrically connected to the corresponding first detection module and the corresponding commutation component 33. The first detection module is used to detect the first temperature of the heat exchange medium in the first delivery pipe 322 and the second temperature of the heat exchange medium in the second delivery pipe 323 of the corresponding thermal management component 32. The first control module is configured to control the corresponding commutation component 33 to switch between the first state and the second state when the difference between the first temperature and the second temperature is greater than a first preset value.

[0195] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0196] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage device, comprising: Cabinet; A battery assembly, housed within the cabinet, comprising multiple individual battery cells; A heat exchange unit for providing a heat exchange medium, the heat exchange unit having a first outlet for the heat exchange medium to flow out and a first inlet for the heat exchange medium to flow in; A thermal management assembly includes multiple thermal management components configured to manage the temperature of the battery device. Each thermal management component has a flow channel for the flow of the heat exchange medium, and the flow channel has a first connection port and a second connection port. Each thermal management component forms a heat exchange loop with the heat exchange unit. as well as A reversing assembly is disposed on the heat exchange circuit. The reversing assembly has a first state and a second state. The reversing assembly is configured to connect the first outlet and the first connecting port and connect the first inlet and the second connecting port in the first state. In the second state, the first outlet and the second connection port are connected, and the first inlet and the first connection port are also connected.

2. The energy storage device according to claim 1, wherein, The commutation component includes: A first valve module has a second inlet, a second outlet and a third outlet, wherein the second inlet is connected to the first outlet, and the second outlet and the third outlet are configured to be selectively connected to the second inlet; The second valve module has a fourth outlet, a third inlet, and a fourth inlet, the fourth outlet being connected to the first inlet, and the third inlet and the fourth inlet being configured to be selectively connected to the fourth outlet; The second outlet and the third inlet are both connected to the first connection port, and the third outlet and the fourth inlet are both connected to the second connection port.

3. The energy storage device according to claim 2, wherein, The first valve module is a three-way valve.

4. The energy storage device according to claim 2, wherein, The first valve module includes a first valve and a second valve, both of which are two-way valves; The first valve has two first ports, the second valve has two second ports, one of the first ports of the first valve and one of the second ports of the second valve are connected to form the second inlet, the other first port of the first valve is the second outlet, and the other second port of the second valve is the third outlet.

5. The energy storage device according to any one of claims 2-4, wherein, The second valve module is a three-way valve.

6. The energy storage device according to any one of claims 2-4, wherein, The second valve module includes a third valve and a fourth valve, both of which are two-way valves; The third valve has two third ports, the fourth valve has two fourth ports, one of the third ports of the third valve and one of the fourth ports of the fourth valve are connected to form the fourth outlet, the other third port of the third valve is the third inlet, and the other fourth port of the fourth valve is the fourth inlet.

7. The energy storage device according to claim 2, wherein, Both the first valve module and the second valve module are three-way ball valves.

8. The energy storage device according to any one of claims 1-7, wherein, The thermal management assembly further includes a first delivery pipe and a second delivery pipe, and the first communication ports of the plurality of thermal management components are all connected to the first delivery pipe, and the second communication ports of the plurality of thermal management components are all connected to the second delivery pipe; The reversing component is configured to: connect the first outlet and the first delivery pipe and connect the first inlet and the second delivery pipe in the first state; and connect the first outlet and the second delivery pipe and connect the first inlet and the first delivery pipe in the second state.

9. The energy storage device according to claim 8, wherein, The energy storage device includes multiple battery packs, each battery pack including multiple battery devices arranged along a first direction, and the multiple battery packs arranged along a second direction, which is perpendicular to the first direction. The energy storage device includes multiple thermal management components, each corresponding to a battery pack.

10. The energy storage device according to claim 9, wherein, The energy storage device includes a plurality of the commutation components, and each of the thermal management components is connected to the heat exchange unit through one of the commutation components.

11. The energy storage device according to claim 10, wherein, The energy storage device further includes multiple first detection modules and multiple first control modules. The first detection module, the first control module, the commutation component and the thermal management component correspond one-to-one. Each first control module is electrically connected to the corresponding first detection module and the corresponding commutation component. The first detection module is used to detect the first temperature of the heat exchange medium in the first delivery pipe and the second temperature of the heat exchange medium in the second delivery pipe of the corresponding thermal management component. The first control module is configured to control the corresponding reversing component to switch between the first state and the second state when the difference between the first temperature and the second temperature is greater than a first preset value.

12. The energy storage device according to claim 9, wherein, The energy storage device further includes a first pipeline and a second pipeline, wherein the first delivery pipes of the plurality of thermal management components are all connected to the first pipeline, and the second delivery pipes of the plurality of thermal management components are all connected to the second pipeline; The first pipeline and the second pipeline are connected to the heat exchange unit through a reversing assembly. The reversing assembly is configured to: connect the first outlet and the first pipeline and connect the first inlet and the second pipeline in the first state; and connect the first outlet and the second pipeline and connect the first inlet and the first pipeline in the second state.

13. The energy storage device according to claim 12, wherein, The energy storage device further includes a second detection module and a second control module, wherein the second control module is electrically connected to the second detection module and the commutation component; The second detection module is used to detect the third temperature of the heat exchange medium in the first pipeline and the fourth temperature of the heat exchange medium in the second pipeline. The second control module is configured to control the commutation component to switch between the first state and the second state when the difference between the third temperature and the fourth temperature is greater than a second preset value.

14. The energy storage device according to any one of claims 1-7, wherein, The energy storage device includes a plurality of the commutation components, each of which corresponds to a thermal management component. Each thermal management component is connected to the heat exchange unit through one of the commutation components.

15. The energy storage device according to claim 14, wherein, The energy storage device also includes multiple third detection modules and multiple third control modules. The third detection modules, third control modules, commutation components and thermal management components correspond one-to-one. Each third control module is electrically connected to the corresponding third detection module and the corresponding commutation component. The third detection module is used to detect the fifth temperature and the sixth temperature of the heat exchange medium at the first connection port of the corresponding thermal management component. The third control module is configured to control the corresponding commutation component to switch between the first state and the second state when the difference between the fifth temperature and the sixth temperature is greater than a third preset value.

16. The energy storage device according to any one of claims 1-15, wherein, The battery device further includes a housing, in which a plurality of battery cells are housed, and the plurality of battery cells are arranged in a second direction and a third direction. The thermal management component is provided on at least one side of the battery device in the first direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

17. The energy storage device according to claim 16, wherein, The energy storage device includes a battery pack, which includes a plurality of battery devices arranged along the first direction, and each battery device has the thermal management component disposed on at least one side of the first direction.

18. The energy storage device according to claim 17, wherein, The thermal management component corresponds to the battery device one by one, and the thermal management component is provided at the bottom of the battery device.

19. The energy storage device according to claim 18, wherein, Along the first direction, the projection of the battery device is located within the corresponding thermal management component.

20. The energy storage device according to any one of claims 16-19, wherein, In a projection plane perpendicular to the first direction, the area defined by the outer contours of the orthographic projections of the plurality of battery cells is greater than or equal to 0.48m². 2 .

21. The energy storage device according to any one of claims 1-20, wherein, The battery cell has a capacity greater than or equal to 200Ah.

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