Energy storage device, energy storage system and charging network

Abstract

The embodiment of the utility model provides an energy storage device, an energy storage system and a charging network. The energy storage device comprises a box body, an electrical component, a heat management module and a connecting pipe. The box body comprises a first cabin, and the first cabin comprises a first box wall. At least part of the electrical component is arranged in the first cabin, the electrical component comprises a battery device and a control module, and the control module is used for electrically controlling the battery device. The heat management module is located above the first box wall and located outside the first cabin, and the heat management module is used for adjusting the temperature of the battery device. The connecting pipe penetrates through the first box wall in the vertical direction, is connected with the battery device and the heat management module and is used for conveying cooling liquid. The energy storage device further comprises a sealing structure, and the sealing structure is used for sealing a gap between the connecting pipe and the first box wall. According to the technical scheme, the reliability of the energy storage device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and in particular, to an energy storage device, an energy storage system, and a charging network. Background Art

[0002] With the rapid development of technology, electric energy has become an indispensable energy source in people's production and life. In order to improve the smoothness of electric energy supply and ensure the normal operation of production and life, energy storage devices are required. As a device for cyclically storing and releasing electric energy, through charging or discharging the energy storage device, electric energy can be stored in the energy storage device or the electric energy stored in the energy storage device can be supplied to the electrical device. Energy storage devices are widely used in industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation, and energy storage power stations and other fields.

[0003] In the development of energy storage device technology, how to improve the reliability of energy storage devices is an urgent technical problem to be solved in energy storage device technology. Summary of the Utility Model

[0004] The present application provides an energy storage device, an energy storage system, and a charging network, which can improve the reliability of the energy storage device.

[0005] The present application is implemented by the following technical solutions:

[0006] In a first aspect, the present application provides an energy storage device, which includes a box body, electrical components, a thermal management module, and a connecting pipe. The box body includes a first compartment, and the first compartment includes a first box wall. At least part of the electrical components is arranged in the first compartment, and the electrical components include a battery device and a control module, and the control module is used for electrically controlling the battery device. The thermal management module is located above the first box wall and outside the first compartment, and the thermal management module is used for regulating the temperature of the battery device. The connecting pipe passes through the first box wall in the vertical direction, and the connecting pipe connects the battery device and the thermal management module, and the connecting pipe is used for transporting the coolant. Among them, the energy storage device further includes a sealing structure, and the sealing structure is used for sealing the gap between the connecting pipe and the first box wall.

[0007] In the technical solution of the embodiment of the present application, by arranging the thermal management module above the first box wall, the thermal management module can share the occupied space with the box body, which is beneficial to saving the floor area of the energy storage device. During the charge and discharge cycle of the battery device, the temperature will rise. When the temperature is too high, there is a risk of affecting the charge and discharge of the battery device and causing thermal runaway of the battery device. By connecting the battery device and the thermal management module through a connecting pipe, the temperature of the battery device is adjusted, which is beneficial to improving the reliability of the energy storage device. The coolant after exchanging heat with the battery device usually flows back to the thermal management module. The thermal management module needs to communicate with the outside to facilitate heat dissipation of the thermal management module. By using a sealing structure to seal the gap between the connecting pipe and the first box wall, the risk of external liquid entering the first compartment and causing short circuit of the battery device is reduced, which is beneficial to improving the reliability of the energy storage device.

[0008] In some embodiments, the energy storage device further includes a heat preservation member. A first cavity is formed inside the first box wall, and the heat preservation member is arranged in the first cavity.

[0009] In the technical solution of the embodiment of the present application, a heat preservation member is arranged inside the first box wall. The heat preservation member separates the inside and outside of the first compartment, so that less heat is exchanged between the outside and the inside of the first compartment, reducing the influence of the outside of the first compartment on the temperature inside the first compartment, thereby reducing the influence of temperature on the battery device, which is beneficial to improving the reliability of the energy storage device.

[0010] In some embodiments, a second cavity is formed inside the first box wall. The first box wall includes a partition wall that separates the first cavity and the second cavity. A part of the connecting pipe is located in the second cavity, and the connecting pipe is arranged at an interval from the partition wall.

[0011] In the technical solution of the embodiment of the present application, the connecting pipe transports the coolant, and the temperature inside the connecting pipe is relatively low. When the outer surface of the connecting pipe contacts the air, condensed water will be generated on the outer surface of the connecting pipe. A part of the connecting pipe is located in the second cavity. By separating the first cavity and the second cavity with a partition wall and arranging the connecting pipe at an interval from the partition wall, the risk of the condensed water generated on the outer surface of the connecting pipe penetrating through the partition wall into the first cavity is reduced, and the risk of the condensed water soaking the heat preservation member and affecting the heat insulation effect of the heat preservation member is reduced, which is beneficial to improving the reliability of the energy storage device.

[0012] In some embodiments, the first box wall is provided with a first opening that communicates with the second cavity, and the sealing structure is arranged in the second cavity.

[0013] In the technical solution of the embodiment of the present application, the sealing structure is arranged in the second cavity. By providing a first opening in the first box wall that communicates with the second cavity, an operating space is provided for the installation of the sealing structure, which is beneficial to improving the convenience of installing the sealing structure.

[0014] In some embodiments, the first tank wall further includes a first wall and a second wall. The first wall and the second wall are disposed opposite to each other in the vertical direction, and the first wall is located below the second wall. The first opening is provided in the first wall. The partition wall surrounds the first opening. One end of the partition wall is connected to the first wall, and the other end is connected to the second wall. The partition wall has a first surface facing the connecting pipe and a second surface facing away from the connecting pipe. The first surface is spaced apart from the connecting pipe. The first surface and the second wall form a second cavity, and the second surface, the first wall, and the second wall form a first cavity.

[0015] In the technical solution of the embodiment of the present application, the second cavity is formed by the partition wall and the second wall, the first cavity is formed by the partition wall, the first wall, and the second wall, and the first surface of the partition wall is spaced apart from the connecting pipe, reducing the risk that the condensed water on the surface of the connecting pipe wets the heat preservation member and thus affects the heat insulation effect of the heat preservation member, which is beneficial to improving the reliability of the energy storage device.

[0016] In some embodiments, the first tank wall further includes a reinforcing wall. The reinforcing wall is disposed in the second cavity, and the reinforcing wall is connected to at least two inner wall surfaces of the second cavity.

[0017] In the technical solution of the embodiment of the present application, by providing the reinforcing wall in the second cavity, it is beneficial to improve the structural strength of the first tank wall, reduce the risk that the damage of the first tank wall causes the damage of the battery cell, and is beneficial to improving the reliability of the energy storage device.

[0018] In some embodiments, the number of the connecting pipes is two. One of the two connecting pipes is used for the thermal management module to deliver the coolant to the battery device, and the other is used for the battery device to deliver the coolant to the thermal management module. The two connecting pipes are spaced apart, and the reinforcing wall separates the two connecting pipes.

[0019] In the technical solution of the embodiment of the present application, by separating the two connecting pipes with the reinforcing wall, on the one hand, when installing the connecting pipes, the two connecting pipes can be respectively installed in the corresponding spaces, reducing the risk that the two connecting pipes affect each other during installation and thus affecting the installation, which is beneficial to improving the installation convenience; on the other hand, during the use or transportation of the energy storage device, the two connecting pipes are respectively located in the corresponding spaces, reducing the risk that the two connecting pipes interfere with each other and cause damage to the connecting pipes, which is beneficial to improving the reliability of the energy storage device.

[0020] In some embodiments, the connecting pipe includes a first section and a second section connected to each other. The first section passes through the first tank wall in the vertical direction, and the second section is located in the first compartment. The second section is configured to be deformable to change the position of the end of the second section away from the first section.

[0021] In the technical solution of the embodiment of the present application, by deforming the second section, the position of the end of the second section facing away from the first section can be changed. When the position of the component connected to the second section is offset or there is a large tolerance, the second section can be deformed to adjust the position of the second section, which is beneficial to improving the convenience of connecting the second section to other components.

[0022] In some embodiments, the second section is configured as a corrugated pipe.

[0023] In the technical solution of the embodiment of the present application, the corrugated pipe can be deformed to change the relative positions of both ends of the corrugated pipe. By setting the second section as a corrugated pipe, the position of the end of the second section facing away from the first section is adjusted, which is beneficial to improving the convenience of connecting the second section to other components.

[0024] In some embodiments, the sealing structure includes a seal and a support. The support and the seal are sleeved around the outer periphery of the connecting pipe. Along the vertical direction, the seal is disposed between the support and the first tank wall, and the support cooperates with the first tank wall to clamp the seal.

[0025] In the technical solution of the embodiment of the present application, by the support cooperating with the first tank wall to clamp the seal, the seal can better seal the gap between the connecting pipe and the first tank wall, reducing the risk of external liquid entering the first compartment and causing a short circuit of the battery device, which is beneficial to improving the reliability of the energy storage device.

[0026] In some embodiments, the first tank wall is provided with a mounting hole. The energy storage device further includes a connecting member that passes through the mounting hole and connects the support, so that the support and the first tank wall clamp the seal.

[0027] In the technical solution of the embodiment of the present application, by connecting the support and the first tank wall with the connecting member, it is convenient for the support to be connected to the first tank wall to clamp the seal, reducing the risk of external liquid entering the first compartment and causing a short circuit of the battery device, which is beneficial to improving the reliability of the energy storage device.

[0028] In some embodiments, the connecting member includes a connecting portion and a fastening portion. The connecting portion passes through the mounting hole. One end of the connecting portion is threadedly connected to the support, and the other end cooperates with the fastening portion. Wherein, there is a gap between the outer surface of the connecting portion and the inner wall surface of the mounting hole, and the fastening portion is limited to the side of the first tank wall facing away from the support.

[0029] In the technical solution of the embodiment of the present application, the first box wall and the support member are connected through the connecting portion and the limiting portion, which is conducive to clamping the seal by the support member and the first box wall. At the same time, by providing a gap between the outer surface of the connecting portion and the inner wall surface of the mounting hole, it is convenient to adjust the mounting position of the connecting member, so as to facilitate the adjustment of the mounting position of the connecting pipe by adjusting the mounting position of the support member. When the position of the component connected to the connecting pipe is offset or there is a large tolerance, the position of the connecting pipe can be adjusted, which is conducive to improving the convenience of connecting the connecting pipe to other components.

[0030] In some embodiments, the box body further includes a second compartment, the second compartment is located above the first box wall, the thermal management module is accommodated in the second compartment, and an air outlet is provided on the top wall of the second compartment.

[0031] In the technical solution of the embodiment of the present application, by arranging the thermal management module in the second compartment, the thermal management module is separated from the outside by the compartment wall of the second compartment, reducing the risk of damage to the thermal management module and improving the reliability of the energy storage device. By providing an air outlet in the second compartment, the heat dissipation effect of the thermal management module is improved, which is conducive to improving the heat exchange effect between the thermal management module and the battery device, and thus conducive to improving the reliability of the energy storage device.

[0032] In a second aspect, the embodiment of the present application further provides an energy storage device, which includes a heat preservation member, a box body, electrical components, a sealing structure, a thermal management module and a connecting pipe. The box body includes a first compartment, and the first compartment includes a first box wall. At least part of the electrical components are arranged in the first compartment, and the electrical components include a battery device and a control module, and the control module is used for electrically controlling the battery device. The thermal management module is used for regulating the temperature of the battery device. The connecting pipe passes through the first box wall, and the connecting pipe connects the battery device and the thermal management module, and the connecting pipe is used for conveying the coolant. The sealing structure is used for sealing the gap between the connecting pipe and the first box wall. Wherein, the first box wall includes a partition wall, and the partition wall is arranged inside the first box wall to divide the internal space of the first box wall into a first cavity and a second cavity, the heat preservation member is arranged in the first cavity, and at least part of the connecting pipe is located in the second cavity, and the connecting pipe located in the second cavity is arranged at an interval from the partition wall.

[0033] In the technical solution of the embodiment of the present application, during the charge and discharge cycle of the battery device, the temperature will rise. When the temperature is too high, there is a risk of affecting the charge and discharge of the battery device and causing thermal runaway of the battery device. By connecting the battery device and the thermal management module through a connecting pipe, the temperature of the battery device is adjusted, which is beneficial to improving the reliability of the energy storage device. By arranging a heat preservation member in the first cavity, the interior and exterior of the first compartment are separated by the heat preservation member, so that less heat is exchanged between the exterior and interior of the first compartment, reducing the temperature of the exterior of the first compartment affecting the interior of the first compartment, thereby reducing the impact of temperature on the battery device and being beneficial to improving the reliability of the energy storage device. The connecting pipe conveys the coolant, and the temperature inside the connecting pipe is relatively low. When the outer surface of the connecting pipe contacts the air, condensed water will be generated on the outer surface of the connecting pipe. A part of the connecting pipe is located in the second cavity. The first cavity and the second cavity are separated by a partition wall, and the connecting pipe and the partition wall are arranged at intervals, reducing the risk of the condensed water generated on the outer surface of the connecting pipe penetrating into the first cavity through the partition wall, and reducing the risk of the condensed water soaking the heat preservation member and thus affecting the heat insulation effect of the heat preservation member, which is beneficial to improving the reliability of the energy storage device.

[0034] In some embodiments, the first box wall further includes a first wall and a second wall, and the first wall and the second wall are oppositely arranged along the thickness direction of the first box wall. One end of the partition wall is connected to the first wall, and the other end is connected to the second wall. The partition wall has a first surface facing the connecting pipe and a second surface facing away from the connecting pipe. The first surface and the second wall form the second cavity, and the second surface, the first wall and the second wall form the first cavity.

[0035] In the technical solution of the embodiment of the present application, the second cavity is formed by the partition wall and the second wall, the first cavity is formed by the partition wall, the first wall and the second wall, and the first surface of the partition wall is arranged at intervals from the connecting pipe, reducing the risk of the condensed water on the surface of the connecting pipe soaking the heat preservation member and thus affecting the heat insulation effect of the heat preservation member, which is beneficial to improving the reliability of the energy storage device.

[0036] In some embodiments, the first box wall further includes a reinforcing wall, and the reinforcing wall is arranged in the second cavity, and the reinforcing wall is connected to at least two inner wall surfaces of the second cavity.

[0037] In the technical solution of the embodiment of the present application, by arranging the reinforcing wall in the second cavity, it is beneficial to improve the structural strength of the first box wall, reduce the risk of damage to the battery cell caused by the damage of the first box wall, and is beneficial to improving the reliability of the energy storage device.

[0038] In some embodiments, the number of the connecting pipes is two. One of the two connecting pipes is used for the thermal management module to convey the coolant to the battery device, and the other is used for the battery device to convey the coolant to the thermal management module. The two connecting pipes are arranged at intervals, and the reinforcing wall separates the two connecting pipes.

[0039] The technical solution of the embodiment of the present application separates the two connecting pipes by a reinforced wall. On the one hand, when installing the connecting pipes, the two connecting pipes can be installed in corresponding spaces respectively, thereby reducing the risk of the two connecting pipes affecting each other during installation and thus affecting the installation, which is beneficial to improving the convenience of installation; on the other hand, during the use or transportation of the energy storage device, the two connecting pipes are respectively located in corresponding spaces, thereby reducing the risk of damage to the connecting pipes due to mutual interference between the two connecting pipes, which is beneficial to improving the reliability of the energy storage device.

[0040] In some embodiments, the connecting tube includes an adjustment section, which is located in the first compartment and connected to the battery device, and the adjustment section is configured to be deformable to change the position of one end of the connecting tube away from the thermal management module.

[0041] The technical solution of the embodiment of the present application can change the position of the adjusting section by deforming the adjusting section. When the position of the component connected to the adjusting section is offset or there is a large tolerance, the position of the adjusting section can be adjusted by deforming the adjusting section, which is beneficial to improving the convenience of connecting the adjusting section with other components.

[0042] In some embodiments, the regulating section is configured as a bellows.

[0043] According to the technical solution of the embodiment of the present application, the bellows can be deformed to change the relative positions of the two ends of the bellows. By setting the adjustment section as the bellows, the position of the adjustment section is adjusted, which is conducive to improving the convenience of connecting the adjustment section with other components.

[0044] In some embodiments, the first box wall has a first opening, and the first opening is communicated with the second cavity.

[0045] According to the technical solution of the embodiment of the present application, the sealing structure is arranged in the second cavity. By arranging a first opening connected to the second cavity on the first box wall, an operating space is provided for the installation of the sealing structure, which is conducive to improving the convenience of installing the sealing structure.

[0046] In some embodiments, the sealing structure includes a sealing member and a support member, which are sleeved on the outer periphery of the connecting pipe. Along the thickness direction of the first box wall, the sealing member is arranged between the support member and the first box wall, and the support member cooperates with the first box wall to clamp the sealing member.

[0047] The technical solution of the embodiment of the present application is to clamp the seal by the support member and the first box wall, so that the seal can better seal the gap between the connecting pipe and the first box wall, reduce the risk of external liquid entering the first compartment and causing a short circuit in the battery device, and help improve the reliability of the energy storage device.

[0048] In some embodiments, the first box wall is provided with a mounting hole, and the energy storage device further comprises a connecting member, which is passed through the mounting hole and connected to the supporting member, so that the supporting member and the first box wall clamp the sealing member.

[0049] The technical solution of the embodiment of the present application connects the support member and the first box wall through a connecting member, which facilitates the connection between the support member and the first box wall to clamp the sealing member, reduces the risk of external liquid entering the first compartment and causing a short circuit in the battery device, and is beneficial to improving the reliability of the energy storage device.

[0050] In some embodiments, the connecting member includes a connecting portion and a fastening portion, the connecting portion is inserted into the mounting hole, one end of the connecting portion is threadedly connected to the support member, and the other end is matched with the fastening portion. There is a gap between the outer surface of the connecting portion and the inner wall surface of the mounting hole, and the fastening portion is limited to the side of the first box wall away from the support member.

[0051] The technical solution of the embodiment of the present application connects the first box wall and the support member through the connection part and the limit part, which is conducive to the support member and the first box wall clamping the sealing member. At the same time, by providing a gap between the outer surface of the connection part and the inner wall surface of the mounting hole, it is convenient to adjust the installation position of the connection member, thereby facilitating the adjustment of the installation position of the connecting pipe by adjusting the installation position of the support member. When the position of the component connected to the connecting pipe is offset or there is a large tolerance, the position of the connecting pipe can be adjusted, which is conducive to improving the convenience of connecting the connecting pipe with other components.

[0052] In a third aspect, an embodiment of the present application further provides an energy storage system, the energy storage system comprising an energy storage converter and any of the above energy storage devices, the energy storage converter being used to electrically connect a power generation device and the energy storage device.

[0053] In a fourth aspect, an embodiment of the present application further provides a charging network, the charging network comprising charging piles and any of the above energy storage devices, the energy storage device being used to provide electrical energy to the charging piles.

[0054] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 A schematic diagram of a charging network provided for some embodiments of the present application;

[0057] Figure 2 Schematic diagram of an energy storage system provided for some embodiments of the present application;

[0058] Figure 3 Schematic diagram of an energy storage device provided for some embodiments of the present application;

[0059] Figure 4 Schematic diagram of a connecting pipe passing through a first tank wall provided for some embodiments of the present application;

[0060] Figure 5 Assembly schematic diagram of a sealing structure and a connecting pipe provided for some embodiments of the present application;

[0061] Figure 6 Schematic diagram of the structure of a first tank wall provided for some embodiments of the present application;

[0062] Figure 7 For Figure 6 Enlarged view at location A in

[0063] Figure 8 Schematic diagram of an energy storage device provided for other embodiments of the present application;

[0064] Figure 9 Schematic diagram of a connecting pipe passing through a first tank wall provided for other embodiments of the present application;

[0065] Figure 10 Assembly schematic diagram of a sealing structure and a connecting pipe provided for other embodiments of the present application;

[0066] Figure 11 Schematic diagram of the structure of a first tank wall provided for other embodiments of the present application;

[0067] Figure 12 For Figure 11 Enlarged view at location B in

[0068] Icon: 1 - Energy storage device; 10 - Box body; 11 - First compartment; 11a - Battery compartment; 11b - Electrical compartment; 111 - First box wall; 1111 - First cavity; 1112 - Second cavity; 1113 - Partition wall; 1113a - First surface; 1113b - Second surface; 1114 - First opening; 1115 - First wall; 1116 - Second wall; 1117 - Third wall; 1118 - Reinforcing wall; 1119 - Mounting hole; 12 - Second compartment; 121 - Air outlet; 20 - Control module; 21 - Battery device; 22 - Electrical components; 30 - Thermal management module; 40 - Connecting pipe; 41 - First section; 42 - Second section; 43 - Adjusting section; 50 - Sealing structure; 51 - Seal; 52 - Support; 60 - Thermal insulation component; 70 - Connector; 71 - Connecting part; 72 - Fastening part; 100 - Charging network; 110 - Charging pile; 200 - Energy storage system; 210 - Energy storage inverter; 220 - Power generation device; X - Horizontal direction; Y - Vertical direction. Detailed implementation manners

[0069] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0070] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0071] Referring to "embodiments" in the present application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0072] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", and "attached" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0073] In the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally represents an "or" relationship between the front and back associated objects.

[0074] In the present application, "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of sheets" refers to two or more sheets (including two sheets).

[0075] The battery device mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0076] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell may be in a cylindrical shape, a flat shape, a cuboid shape, or other shapes, and the embodiments of the present application do not limit this either.

[0077] Generally, a battery cell includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent short circuit between the positive and negative electrodes and allow active ions to pass through at the same time.

[0078] Optionally, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0079] Optionally, the electrode assembly is a stacked structure.

[0080] Optionally, the shape of the electrode assembly can be cylindrical, flat, or prismatic, etc.

[0081] In some embodiments, the battery device may be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0082] In some embodiments, the battery device may be a battery pack, which includes a housing box and battery cells. The battery cells or battery modules are accommodated in the housing box.

[0083] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0084] The energy storage device generally includes a box body, a thermal management module, a connecting pipe, and a battery device. The battery device and the thermal management module are both arranged in the box body. The connecting pipe connects the battery device and the thermal management module to realize the exchange of coolant between the thermal management module and the battery device, facilitating the thermal management module to adjust the temperature of the battery device.

[0085] In order to reduce the floor area of the thermal management module, the thermal management module can be arranged above the battery device, so that the thermal management module and the battery device share the floor area, reducing the additional occupied area for arranging the thermal management module.

[0086] In order to facilitate the heat dissipation of the thermal management module, the thermal management module is generally in communication with the outside of the box body. However, when the thermal management module is in communication with the outside of the box body, external liquid (the liquid can be rainwater, dew or other liquid) may enter the box body, easily come into contact with the battery device, resulting in the risk of short - circuit of the battery device and affecting the reliability of the energy storage device.

[0087] In view of this, to solve the risk that the external liquid contacts the battery device, causes the short - circuit of the battery device, and thus affects the reliability of the energy storage device, an energy storage device is proposed in the embodiments of the present application. The energy storage device includes a box body, electrical components, a thermal management module, and a connecting pipe. The box body includes a first compartment, and the first compartment includes a first box wall. At least part of the electrical components are arranged in the first compartment. The electrical components include a battery device and a control module, and the control module is used for electrical control of the battery device. The thermal management module is located above the first box wall and outside the first compartment, and the thermal management module is used for adjusting the temperature of the battery device. The connecting pipe passes through the first box wall in the vertical direction, and the connecting pipe connects the battery device and the thermal management module, and the connecting pipe is used for transporting coolant. Wherein, the energy storage device further includes a sealing structure, and the sealing structure is used for sealing the gap between the connecting pipe and the first box wall.

[0088] By sealing the gap between the connecting pipe and the first box wall with the sealing structure, the risk of external liquid entering the first compartment and causing the short - circuit of the battery device is reduced, which is beneficial to improving the reliability of the energy storage device.

[0089] The energy storage device disclosed in the embodiments of the present application can be used in energy storage power stations, wind power generation systems, solar power generation systems, charging piles, mobile power systems, or temporary power supply systems, etc. The energy storage power station can store electrical energy during low electricity consumption periods and supply electrical energy to relevant users or electrical equipment during high electricity consumption periods. After the wind energy collected by the wind turbines in the wind power generation system is converted into electrical energy, it is stored by the energy storage device. The solar power generation system can convert solar energy into electrical energy, which is then stored by the energy storage device and supplied to users at the right time. The mobile power system can supply power to relevant electrical equipment in places where the grid power supply system cannot reach, such as remote mountainous areas, secluded wild areas, etc. The temporary power supply system can supply power to users in case of insufficient power supply. The energy storage system provided by the embodiments of the present application can be any power system that requires the use of an energy storage device.

[0090] Please refer to Figure 1 and Figure 3 , Figure 1 which is a schematic diagram of the charging network provided by some embodiments of the present application. The embodiments of the present application provide a charging network 100, and the charging network 100 includes a charging pile 110, which is used to charge electrical equipment. The charging network 100 may further include an energy storage device 1, and the energy storage device 1 is electrically connected to the charging pile 110 and is used to supply electrical energy to the charging pile 110.

[0091] It should be noted that the charging pile 110 and the battery device 21 in the energy storage device 1 are electrically connected through a cable, and the battery device 21 can supply the electrical energy stored in itself to the charging pile 110. The charging pile 110 has a connector, and the connector can be connected to the electrical equipment, so as to supply energy to the electrical equipment. The application of the energy storage device 1 in the charging network 100 can effectively improve the safety of the charging network 100 and also help to improve the flexibility of the charging network 100 during deployment.

[0092] In a charging network 100, there can be one charging pile 110, and the energy storage device 1 supplies electrical energy to one charging pile 110; as Figure 1 shown, there can also be two charging piles 110, or there can be multiple charging piles 110, and the energy storage device 1 supplies electrical energy to multiple charging piles 110.

[0093] The energy storage device 1 can include a box body and a battery device 21, and the battery device 21 is electrically connected to the charging pile 110 to facilitate the battery device to supply electrical energy to the charging pile 110.

[0094] Please refer to Figure 2 , Figure 2Schematic diagram of an energy storage system provided by some embodiments of the present application. Some embodiments of the present application provide an energy storage system 200. The energy storage system 200 includes an energy storage converter 210, and the energy storage converter 210 can be electrically connected to a power generation device 220 to convert the electric power provided by the power generation device 220. The energy storage system 200 may further include an energy storage device 1, and the energy storage device 1 is electrically connected to the energy storage converter 210. The energy storage converter 210 converts the electric energy provided by the power generation device 220 through power conversion and stores it in the energy storage device 1.

[0095] The energy storage converter 210 is used to connect between the power generation device 220 and the energy storage device 1. The power generation device 220 is used to generate electric energy, and the power generation device 220 is used to store the electric energy generated by it in the energy storage device 1 through the energy storage converter 210. The energy storage system 200 applies the energy storage device 1, which can effectively improve the operation safety of the energy storage system 200. In specific implementation, the power generation device 220 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, etc. Among them, the specific type of the power generation device 220 is not limited in the present application.

[0096] As an example, as Figure 2 shown, the energy storage system 200 includes an energy storage device 1 and an energy storage converter 210. Two power generation devices 220 respectively transmit the generated electric energy to the energy storage converter 210, and the electric energy is imported into the energy storage device 1 through the energy storage converter 210 for storage.

[0097] The following introduces the energy storage device 1 in the embodiments of the first aspect.

[0098] Please refer to Figure 3 and Figure 4 , Figure 3 Schematic diagram of an energy storage device provided by some embodiments of the present application, Figure 4 Schematic diagram of a connecting pipe passing through the first box wall provided by some embodiments of the present application. Some embodiments of the present application provide an energy storage device 1. The energy storage device 1 includes a box body 10, electrical components 22, a thermal management module 30, and a connecting pipe 40. The box body 10 includes a first compartment 11, and the first compartment 11 includes a first box wall 111. At least part of the electrical components 22 is arranged in the first compartment 11. The electrical components 22 include a battery device 21 and a control module 20. The control module 20 is used to perform electrical control on the battery device 21. The thermal management module 30 is located above the first box wall 111 and is located outside the first compartment 11. The thermal management module 30 is used to adjust the temperature of the battery device 21. The connecting pipe 40 passes through the first box wall 111 in the vertical direction Y. The connecting pipe 40 connects the battery device 21 and the thermal management module 30. The connecting pipe 40 is used to convey a coolant. Among them, the energy storage device 1 further includes a sealing structure 50, and the sealing structure 50 is used to seal the gap between the connecting pipe 40 and the first box wall 111.

[0099] In some embodiments, the dimensions of the box body 10 may be equal to those of a standard container.

[0100] The standard container may be the size of a standard container during transportation. For example, it may be 20 feet, 30 feet, 40 feet, or 45 feet. The standard container meets the corresponding standards, and its length, width, and height have corresponding dimensions respectively.

[0101] The 20-foot standard container may be: the dimension in the length direction is 6058 mm, with a tolerance of 0 mm - 6 mm; the dimension in the width direction is 2438 mm, with a tolerance of 0 mm - 5 mm; and the dimension in the height direction is 2896 mm, 2591 mm, or not greater than 2438 mm; the tolerance is 0 mm - 5 mm.

[0102] The 30-foot standard container may be: the dimension in the length direction is 9125 mm, with a tolerance of 0 mm - 10 mm; the dimension in the width direction is 2438 mm, with a tolerance of 0 mm - 5 mm; and the dimension in the height direction is 2896 mm, 2591 mm, or not greater than 2438 mm; the tolerance is 0 mm - 5 mm.

[0103] The 40-foot standard container may be: the dimension in the length direction is 12192 mm, with a tolerance of 0 mm - 10 mm; the dimension in the width direction is 2438 mm, with a tolerance of 0 mm - 5 mm; and the dimension in the height direction is 2896 mm, 2591 mm, or not greater than 2438 mm; the tolerance is 0 mm - 5 mm.

[0104] The 45-foot standard container may be: the dimension in the length direction is 13716 mm, with a tolerance of 0 mm - 10 mm; the dimension in the width direction is 2438 mm, with a tolerance of 0 mm - 5 mm; and the dimension in the height direction is 2591 mm or 2896 mm; the tolerance is 0 mm - 5 mm.

[0105] In some embodiments, the dimensions of the box body 10 corresponding to those of the standard container mean that the dimension of the box body 10 in the length direction corresponds to the dimension of the standard container in the length direction, the dimension of the box body 10 in the width direction corresponds to the dimension of the standard container in the width direction, and the dimension of the box body 10 in the height direction corresponds to the dimension of the standard container in the height direction.

[0106] In some embodiments, the box body 10 of the energy storage device 1 may directly use a standard container, or the box body 10 may be processed according to the dimensions of the standard container.

[0107] During transportation, standard containers usually have corresponding transportation specifications. Especially during sea transportation, there are placement areas on the transport ship for each standard container. Matching the size of the box body 10 with that of the standard container facilitates the transportation of the energy storage device 1.

[0108] In some embodiments, at least one of the dimensions of the box body 10 in the length direction, width direction, and height direction may not be equal to the corresponding dimension of the standard container.

[0109] In some embodiments, only one of the dimensions of the box body 10 in the length direction, width direction, and height direction may not be equal to the corresponding dimension of the standard container, and the other two dimensions may be equal to the corresponding two dimensions of the standard container. For example, the dimension of the box body 10 in the length direction may not be equal to the corresponding dimension of the standard container, or the dimension of the box body 10 in the width direction may not be equal to the corresponding dimension of the standard container, or the dimension of the box body 10 in the height direction may not be equal to the corresponding dimension of the standard container.

[0110] In some embodiments, two of the dimensions of the box body 10 in the length direction, width direction, and height direction may not be equal to the corresponding two dimensions of the standard container, and the other dimension may be equal to the corresponding dimension of the standard container. For example, the dimension of the box body 10 in the length direction may be equal to the corresponding dimension of the standard container, or the dimension of the box body 10 in the width direction may be equal to the corresponding dimension of the standard container, or the dimension of the box body 10 in the height direction may be equal to the corresponding dimension of the standard container.

[0111] In some embodiments, the dimensions of the box body 10 in the length direction, width direction, and height direction are not equal to the corresponding dimensions of the standard container.

[0112] In some embodiments, when the size of the box body 10 is not equal to the corresponding size of the standard container, the size of the box body 10 may be smaller than the corresponding size of the standard container; or the size of the box body 10 may be larger than the corresponding size of the standard container. For example, the dimension of the box body 10 in the height direction may be smaller than the dimension of the standard container in the height direction, or the dimension of the box body 10 in the width direction may be smaller than the dimension of the standard container in the height direction, or the dimension of the box body 10 in the length direction may be smaller than the dimension of the standard container in the height direction.

[0113] In some embodiments, based on the usage scenario of the energy storage device 1, when the electricity demand is large, the energy storage device 1 can increase the size of the box body 10, so that the box body 10 can accommodate more battery devices 21, thereby increasing the stored electricity of the energy storage device 1.

[0114] In some embodiments, if the power consumption demand is small, the number of battery devices 21 can be reduced, and the energy storage device 1 can reduce the size of the box body 10 to reduce space waste.

[0115] In some embodiments, the material of the box body 10 can be stainless steel, alloy, etc.

[0116] In some embodiments, there can be multiple battery devices 21. A group of battery devices 21 formed by connecting multiple battery devices 21 in series or in parallel. Multiple battery devices 21 can be arranged along the vertical direction Y. A busbar component can be provided at the bottom of multiple battery devices 21 to output the current of multiple battery devices 21 after converging.

[0117] In some embodiments, the number of battery devices 21 can be multiple. Multiple battery devices 21 can be arranged along the horizontal direction X. Multiple battery devices 21 can be connected in series or in parallel.

[0118] In some embodiments, the horizontal direction can be represented by the direction indicated by the letter X in the figure, the vertical direction can be represented by the direction indicated by the letter Y in the figure. The vertical direction Y can be parallel to the direction of gravity, and the vertical direction Y can be perpendicular to the horizontal direction X.

[0119] In some embodiments, the horizontal direction X can be parallel to the length direction or the width direction of the box body 10, and the vertical direction Y can be parallel to the height direction of the box body 10.

[0120] In some embodiments, the battery device 21 can have a first coolant inlet and a first coolant outlet. The coolant enters the cooling channel of the battery device 21 from the first coolant inlet, exchanges heat with the battery cells in the battery device 21, and then flows out from the first coolant outlet.

[0121] In some embodiments, the number of connecting pipes 40 can be two. One connecting pipe 40 connects the thermal management module 30 and the coolant inlet to transport the coolant in the thermal management module 30 from the coolant inlet to the battery device 21. The other connecting pipe 40 connects the thermal management module 30 and the coolant outlet to transport the coolant after heat exchange in the battery device 21 from the coolant outlet to the thermal management module 30.

[0122] In some embodiments, the way the connecting pipe 40 connects the thermal management module 30 and the battery device 21 can be quick-connect. That is, quick-connect joints are respectively provided at both ends of the connecting pipe 40. Quick-connect joints are also provided on the thermal management module 30 and the battery device 21. The two quick-connect joints of the connecting pipe 40 are respectively connected to the quick-connect joints of the thermal management module 30 and the battery device 21.

[0123] In some embodiments, the coolant can be used to cool down the battery device 21.

[0124] The thermal management module 30 is located outside the first compartment 11. In some embodiments, it can be understood that the thermal management module 30 can be disposed inside the box body 10 or outside the box body 10.

[0125] In some embodiments, the thermal management module 30 may include a pumping device for conveying the coolant and providing power for the conveyance of the coolant.

[0126] In some embodiments, the thermal management module 30 can store the coolant to convey the coolant stored in the thermal management component to the battery device 21 and store the coolant output by the battery device 21 during the heat exchange cycle.

[0127] In some embodiments, the box body 10 may include a first compartment 11. The battery device 21 can be disposed inside the first compartment 11, and the thermal management module 30 can be disposed outside the first compartment 11.

[0128] In some embodiments, the first compartment 11 includes a first box wall 111. During the use of the energy storage device 1, the first box wall 111 can be located above the battery device 21, and the thermal management module 30 can be located above the first box wall 111. That is, the first box wall 111 separates the thermal management module 30 and the battery device 21. The thickness direction of the first box wall 111 can be parallel to the vertical direction Y. When the connecting pipe 40 connects the thermal management module 30 and the battery device 21, a part of the connecting pipe 40 needs to pass through the first box wall 111.

[0129] It should be noted that there can be multiple battery devices 21. Multiple battery devices 21 can all be located below the first box wall 111, or at least some of the battery devices 21 can be located below the first box wall 111. That is, the first box wall 111 can be the highest box wall of the first compartment 11 in the vertical direction Y, or one or several of the box walls of the first compartment 11 can be located above the first box wall 111 in the vertical direction Y.

[0130] In some embodiments, the first compartment 11 may include a battery compartment 11a and an electrical compartment 11b. The battery device 21 is disposed in the battery compartment 11a, where the battery device 21 can be entirely located in the battery compartment 11a, or a part of the battery device 21 can be located in the battery compartment 11a and another part can be located in the electrical compartment 11b. The energy storage device 1 may include a control module 20. The control module 20 can be located in the electrical compartment 11b. The control module can be electrically connected to the battery device 21 for electrically controlling the battery device 21.

[0131] Among them, the connecting pipe 40 can enter the first compartment 11 from the first box wall 111, first pass through the electrical compartment 11b and then enter the battery compartment 11a to be connected to the battery device 21. That is, the electrical compartment 11b and the control module 20 located in the electrical compartment 11b are directly below the thermal management module 30, and the battery compartment 11a and the battery device 21 located in the battery compartment 11a are below the side of the thermal management module 30. Or a part of the battery compartment 11a and a part of the battery device 21 located in the battery compartment 11a are below the side of the thermal management module 30, and another part of the battery compartment 11a and another part of the battery device 21 located in the battery compartment 11a are above the side of the thermal management module 30. Alternatively, the connecting pipe 40 can enter the first compartment 11 from the first box wall 111 and directly enter the battery compartment 11a to be connected to the battery device 21.

[0132] In some embodiments, the connecting pipe 40 can extend entirely along the vertical direction Y. Alternatively, a part of the connecting pipe 40 can extend along the vertical direction Y, and another part of the connecting pipe 40 can extend along the horizontal direction X.

[0133] In some embodiments, the connecting pipe 40 can be integrally formed. The connecting pipe 40 can include a first section 41, and the first section 41 passes through the first box wall 111. That is, a part of the first section 41 can be located outside the first compartment 11, and this part can be connected to the thermal management module 30. A part of the first section 41 can be located inside the first box wall 111, and a part of the first section 41 can be located inside the first compartment 11.

[0134] In some embodiments, the first box wall 111 can be provided with a through hole. The through hole penetrates the two surfaces of the first box wall 111 in the thickness direction along the vertical direction Y, and the first section 41 passes through the through hole to connect the thermal management module 30 and the battery device 21.

[0135] It can be imagined that the outer diameter of the first section 41 can be approximately equal to the inner diameter of the through hole. However, for the convenience of installing the connecting pipe 40, there is still a gap between the outer surface of the first section 41 and the inner surface of the through hole, and liquid may enter the inside of the first compartment 11 through this gap, resulting in the liquid contacting the battery device 21 and causing the battery device 21 to short - circuit.

[0136] Therefore, a sealing structure 50 is provided between the first section 41 and the first box wall 111 to reduce the risk of liquid entering the first compartment 11.

[0137] In some embodiments, the sealing structure 50 may be disposed between the outer surface of the first section 41 and the inner surface of the through hole. The sealing structure 50 may also be disposed on the outer surface of the first tank wall 111, so that after the first section 41 passes through the through hole, the opening of the through hole on the outer surface of the first tank wall 111 is closed. The sealing structure 50 may also be disposed on the inner surface of the first tank wall 111, so that after the first section 41 passes through the through hole, the opening of the through hole on the inner surface of the first tank wall 111 is closed.

[0138] It should be noted that the outer surface of the first tank wall 111 may be the surface of the first tank wall 111 facing the thermal management module 30 in the vertical direction Y, and the inner surface of the first tank wall 111 may be the surface of the first tank wall 111 facing away from the thermal management module 30 in the vertical direction Y.

[0139] In some embodiments, the sealing structure 50 seals the gap between the outer surface of the first section 41 and the inner surface of the through hole described above.

[0140] In the technical solution of the embodiment of the present application, by disposing the thermal management module 30 above the first tank wall 111, the thermal management module 30 can share the occupied space with the box body 10, which is beneficial to saving the floor area of the energy storage device 1. During the charge and discharge cycle of the battery device 21, the temperature will rise. When the temperature is too high, there is a risk of affecting the charge and discharge of the battery device 21 and causing thermal runaway of the battery device 21. By connecting the battery device 21 and the thermal management module 30 through the connecting pipe 40, the temperature of the battery device 21 is adjusted, which is beneficial to improving the reliability of the energy storage device 1. The coolant after heat exchange with the battery device 21 usually flows back to the thermal management module 30. The thermal management module 30 needs to communicate with the outside to facilitate the heat dissipation of the thermal management module 30. By sealing the gap between the connecting pipe 40 and the first tank wall 111 through the sealing structure 50, the risk of external liquid entering the first compartment 11 and causing a short circuit of the battery device 21 is reduced, which is beneficial to improving the reliability of the energy storage device 1.

[0141] Please refer to Figure 6 , Figure 6 , which is a schematic structural diagram of the first tank wall provided by some embodiments of the present application. In some embodiments, the energy storage device 1 further includes a heat preservation member 60. A first cavity 1111 is formed inside the first tank wall 111, and the heat preservation member 60 is disposed in the first cavity 1111.

[0142] In some embodiments, the heat preservation member 60 may be heat preservation rock wool, glass wool, polyurethane foam, etc.

[0143] The charge and discharge performance of the battery device 21 is related to temperature. When the temperature of the battery device 21 is too high or too low, it is easy to cause the charge and discharge efficiency of the battery device 21 to be low or cause the battery device 21 to malfunction.

[0144] Therefore, in some embodiments, the heat insulation member 60 may have a good effect of blocking heat transfer. The first tank wall 111 may have a certain thickness in the vertical direction Y. A first cavity 1111 is formed inside the first tank wall 111, and the heat insulation member 60 is disposed in the first cavity 1111 to isolate the interior of the first compartment 11 from the exterior, reduce the influence of the temperature outside the first compartment 11 on the temperature inside the first compartment 11, and thus reduce the influence of the exterior of the first compartment 11 on the temperature of the battery device 21.

[0145] In some embodiments, the first compartment 11 may include the first tank wall 111 and a plurality of other tank walls. The first tank wall 111 and the plurality of other tank walls together enclose the interior space of the first compartment 11, and the battery device 21 is disposed in the interior space of the first compartment 11. Heat insulation members 60 may be disposed inside both the first tank wall 111 and the plurality of other tank walls.

[0146] In some embodiments, a part of the space of the first cavity 1111 may be provided with the heat insulation member 60, that is, there is a gap between the heat insulation member 60 and a part of the inner wall surface forming the first cavity 1111.

[0147] In some embodiments, the entire space of the first cavity 1111 may be provided with the heat insulation member 60. The heat insulation member 60 may be extruded and disposed in the first cavity 1111, and after being disposed in the first cavity 1111, the heat insulation member 60 resets to fill the space of the first cavity 1111.

[0148] In some embodiments, the first tank wall 111 may be formed by enclosing a plurality of plate members, wherein some of the plate members are spaced apart in the vertical direction Y and some of the plate members are spaced apart in the horizontal direction X, thereby forming the first cavity 1111.

[0149] In some embodiments, the first tank wall 111 may be cast or extruded to form the first cavity 1111 with an opening, and a plate member is provided to close the opening.

[0150] In the technical solution of the embodiment of the present application, the heat insulation member 60 is disposed inside the first tank wall 111, and the interior and exterior of the first compartment 11 are separated by the heat insulation member 60, so that there is less heat exchange between the exterior and the interior of the first compartment 11, reduce the influence of the exterior of the first compartment 11 on the temperature inside the first compartment 11, thereby reducing the influence of the temperature on the battery device 21, which is beneficial to improving the reliability of the energy storage device 1.

[0151] Please refer to Figure 4 and Figure 6, in some embodiments, a second cavity 1112 is formed inside the first box wall 111. The first box wall 111 includes a partition wall 1113 that separates the first cavity 1111 and the second cavity 1112. A part of the connecting pipe 40 is located in the second cavity 1112, and the connecting pipe 40 is arranged at an interval from the partition wall 1113.

[0152] In some embodiments, the partition wall 1113 may extend along the vertical direction Y, and the thickness direction of the partition wall 1113 may be perpendicular to the vertical direction Y.

[0153] In some embodiments, the partition wall 1113 may have two surfaces in the thickness direction. One surface may be used to form the first cavity 1111, and the other surface may be used to form the second cavity 1112.

[0154] Since the connecting pipe 40 is used to transport the coolant, that is, the temperature inside the connecting pipe 40 is relatively low, and the temperature outside the connecting pipe 40 is relatively high. Due to the temperature difference formed between the inside and outside of the connecting pipe 40, condensed water may be formed by condensation on the outer surface of the connecting pipe 40. The condensed water may penetrate through the partition wall 1113 into the first cavity 1111, thereby wetting the heat insulation member 60 and affecting the heat insulation effect of the heat insulation member 60.

[0155] Therefore, in some embodiments, by arranging the partition wall 1113 at an interval from the connecting pipe 40, the risk of the condensed water on the outer surface of the connecting pipe 40 coming into contact with the partition wall 1113 is reduced.

[0156] In some embodiments, the first box wall 111 may be provided with a through hole for the connecting pipe 40 to pass through. The through hole may communicate with the second cavity 1112, so that the connecting pipe 40 passes through the through hole, and a part of the first section 41 of the connecting pipe 40 is located inside the second cavity 1112.

[0157] In the technical solution of the embodiment of the present application, the connecting pipe 40 transports the coolant, and the temperature inside the connecting pipe 40 is relatively low. When the outer surface of the connecting pipe 40 comes into contact with the air, condensed water will be generated on the outer surface of the connecting pipe 40. A part of the connecting pipe 40 is located in the second cavity 1112. The partition wall 1113 separates the first cavity 1111 and the second cavity 1112, and the connecting pipe 40 and the partition wall 1113 are arranged at an interval, reducing the risk that the condensed water generated on the outer surface of the connecting pipe 40 penetrates through the partition wall 1113 into the first cavity 1111, and reducing the risk that the condensed water wets the heat insulation member 60 and thus affects the heat insulation effect of the heat insulation member 60, which is beneficial to improving the reliability of the energy storage device 1.

[0158] Please refer to Figure 4 and Figure 6 and refer to Figure 5 , Figure 5Schematic diagram of the assembly of the sealing structure and the connecting pipe provided by some embodiments of the present application. In some embodiments, a first opening 1114 is provided on the first box wall 111, and the first opening 1114 communicates with the second cavity 1112, and the sealing structure 50 is disposed in the second cavity 1112.

[0159] In some embodiments, the first box wall 111 may include two plate members oppositely disposed along the vertical direction Y, and the partition wall 1113 is connected to the two plate members at both ends in the vertical direction Y, thereby forming a first cavity 1111 and a second cavity 1112.

[0160] In some embodiments, the sealing structure 50 may be disposed in the second cavity 1112. The first box wall 111 may be provided with a through hole for the connecting pipe 40 to pass through. Since the inner diameter of the through hole needs to be approximate to the outer diameter of the connecting pipe 40, that is, the inner diameter of the through hole is small, the space for installing the sealing structure 50 through the through hole is small. Therefore, a first opening 1114 is provided on the first box wall 111, and the first opening 1114 communicates with the second cavity 1112 in the vertical direction Y to facilitate the installation of the sealing structure 50 in the second cavity 1112.

[0161] In some embodiments, the first opening 1114 may be provided on the upper surface of the first box wall 111 in the vertical direction Y, that is, the sealing structure 50 may be disposed on the upper surface of the lower one of the two plate members.

[0162] In some embodiments, the first opening 1114 may be provided on the lower surface of the first box wall 111, that is, the sealing structure 50 may be disposed on the lower surface of the upper one of the two plate members.

[0163] In the technical solution of the embodiment of the present application, the sealing structure 50 is disposed in the second cavity 1112. By providing a first opening 1114 on the first box wall 111 that communicates with the second cavity 1112, an operating space is provided for the installation of the sealing structure 50, which is beneficial to improving the convenience of installing the sealing structure 50.

[0164] Please refer to Figure 4 and Figure 6, in some embodiments, the first box wall 111 further includes a first wall 1115 and a second wall 1116. The first wall 1115 and the second wall 1116 are oppositely arranged along the vertical direction Y, and the first wall 1115 is located below the second wall 1116. The first opening 1114 is provided in the first wall 1115. The partition wall 1113 surrounds the periphery of the first opening 1114. One end of the partition wall 1113 is connected to the first wall 1115, and the other end is connected to the second wall 1116. The partition wall 1113 has a first surface 1113a facing the connecting pipe 40 and a second surface 1113b facing away from the connecting pipe 40. The first surface 1113a is spaced apart from the connecting pipe 40. The first surface 1113a and the second wall 1116 form a second cavity 1112, and the second surface 1113b, the first wall 1115 and the second wall 1116 form a first cavity 1111.

[0165] In some embodiments, the first box wall 111 may include a first wall 1115, a second wall 1116 and a third wall 1117. The first wall 1115 and the second wall 1116 are oppositely arranged along the vertical direction Y, the first wall 1115 is located below the second wall 1116, and the first opening 1114 is provided in the first wall 1115, that is, the first opening 1114 is provided below the second cavity 1112.

[0166] The number of the third walls 1117 may be multiple. The third walls 1117 may extend along the vertical direction Y. The third walls 1117 may surround the outer periphery of the first wall 1115. In the vertical direction Y, one end of the third wall 1117 may be connected to the first wall 1115, and the other end may be connected to the outer periphery of the second wall 1116.

[0167] The first wall 1115 is provided with the first opening 1114. The number of the partition walls 1113 may be multiple. The partition walls 1113 may extend along the vertical direction Y. The first wall 1115 may surround the outer periphery of the first opening 1114. In the vertical direction Y, one end of the partition wall 1113 may be connected to the first wall 1115, and the other end may be connected to the second wall 1116.

[0168] Wherein, the partition wall 1113 may be connected to the first wall 1115 and the second wall 1116 by welding or bolt connection or the like.

[0169] In some embodiments, the partition walls 1113 may be spaced apart from the third walls 1117. The second surface 1113b of the partition wall 1113 facing away from the connecting pipe 40, the surface of the first wall 1115 facing the second wall 1116, the surface of the second wall 1116 facing the first wall 1115, and the surface of the third wall 1117 facing the partition wall 1113 may jointly form the first cavity 1111.

[0170] The first surface 1113a of the partition wall 1113 facing the connecting pipe 40 and the surface of the second wall 1116 facing the first wall 1115 can jointly form a second cavity 1112 with a first opening 1114.

[0171] In some embodiments, with the vertical direction Y as the projection direction, the projection of the first wall 1115 can cover the projection of the partition wall 1113. That is, the first wall 1115 can have a main body portion and a flanging portion. The main body portion and the flanging portion are connected. The main body portion, the second wall 1116, the third wall 1117, and the partition wall 1113 form a first cavity 1111. The flanging portion is located outside the first cavity 1111, and the flanging portion is welded to the partition wall 1113 to facilitate the connection between the partition wall 1113 and the first wall 1115.

[0172] In the technical solution of the embodiment of the present application, the second cavity 1112 is formed by the partition wall 1113 and the second wall 1116, the first cavity 1111 is formed by the partition wall 1113, the first wall 1115, and the second wall 1116, and the first surface 1113a of the partition wall 1113 is spaced from the connecting pipe 40, reducing the risk that the condensate water on the surface of the connecting pipe 40 wets the heat insulation member 60 and thus affects the heat insulation effect of the heat insulation member 60, which is beneficial to improving the reliability of the energy storage device 1.

[0173] Please refer to Figure 4 and Figure 6 , in some embodiments, the first box wall 111 further includes a reinforcing wall 1118. The reinforcing wall 1118 is disposed in the second cavity 1112, and the reinforcing wall 1118 connects at least two inner wall surfaces of the second cavity 1112.

[0174] In some embodiments, the reinforcing wall 1118 can extend along the vertical direction Y, and the reinforcing wall 1118 is located in the second cavity 1112.

[0175] In some embodiments, the reinforcing wall 1118 can connect three inner wall surfaces of the second cavity 1112. One end of the reinforcing wall 1118 above in the vertical direction Y can be connected to the second wall 1116, and both ends of the reinforcing wall 1118 in the horizontal direction X can be respectively connected to two oppositely arranged third walls 1117.

[0176] In some embodiments, the reinforcing wall 1118 can connect two inner wall surfaces of the second cavity 1112. One end of the reinforcing wall 1118 above in the vertical direction Y can be connected to the second wall 1116, and one end of the reinforcing wall 1118 in the horizontal direction X can be connected to one third wall 1117.

[0177] In the technical solution of the embodiment of the present application, by providing a reinforcing wall 1118 in the second cavity 1112, it is beneficial to improve the structural strength of the first box wall 111, reduce the risk of damage to the battery cell caused by the damage of the first box wall 111, and is beneficial to improve the reliability of the energy storage device 1.

[0178] Please refer to Figures 4 to 6 , in some embodiments, the number of the connecting pipes 40 is two. One of the two connecting pipes 40 is used for the thermal management module 30 to deliver the coolant to the battery device 21, and the other is used for the battery device 21 to deliver the coolant to the thermal management module 30. The two connecting pipes 40 are arranged at intervals, and the reinforcing wall 1118 separates the two connecting pipes 40.

[0179] In some embodiments, the number of the connecting pipes 40 can be two. One connecting pipe 40 connects the thermal management module 30 and the coolant inlet to deliver the coolant in the thermal management module 30 from the coolant inlet to the battery device 21, and the other connecting pipe 40 connects the thermal management module 30 and the coolant outlet to deliver the coolant after heat exchange in the battery device 21 from the coolant outlet to the thermal management module 30.

[0180] In some embodiments, the partition wall 1113 is arranged in the second cavity 1112 and can divide the second cavity 1112 into two chambers. One of the two connecting pipes 40 is arranged in one chamber, and the other of the two connecting pipes 40 is arranged in the other chamber.

[0181] In the technical solution of the embodiment of the present application, by separating the two connecting pipes 40 with the reinforcing wall 1118, on the one hand, when installing the connecting pipes 40, the two connecting pipes 40 can be respectively installed in the corresponding spaces, reducing the risk that the two connecting pipes 40 affect each other during installation and thus affecting the installation, which is beneficial to improving the installation convenience; on the other hand, during the use or transportation of the energy storage device 1, the two connecting pipes 40 are respectively located in the corresponding spaces, reducing the risk that the two connecting pipes 40 interfere with each other and cause damage to the connecting pipes 40, which is beneficial to improving the reliability of the energy storage device 1.

[0182] Please refer to Figures 4 to 6 , in some embodiments, the connecting pipe 40 includes a first section 41 and a second section 42 connected to each other. The first section 41 passes through the first box wall 111 along the vertical direction Y, and the second section 42 is located in the first compartment 11. The second section 42 is configured to be able to deform to change the position of the end of the second section 42 away from the first section 41.

[0183] In some embodiments, the first section 41 and the second section 42 can be connected by quick insertion or interference fit.

[0184] In some embodiments, the connecting pipe 40 can be formed by injection molding the second section 42 at one end of the first section 41, or by casting the first section 41 at one end of the second section 42.

[0185] In some embodiments, the second section 42 can extend along the vertical direction Y, and the second section 42 can be deformed so that after one end of the second section 42 is connected to the first section 41, it is deformed along the horizontal direction X, so that the position of the end of the second section 42 away from the first section 41 is changed.

[0186] In some embodiments, the second section 42 can be a bellows, a metal hose or a plastic hose.

[0187] In the technical solution of the embodiment of the present application, by deforming the second section 42, the position of the end of the second section 42 away from the first section 41 can be changed. When the position of the component connected to the second section 42 is offset or there is a large tolerance, the second section 42 can be deformed, so as to adjust the position of the second section 42, which is beneficial to improving the convenience of connecting the second section 42 to other components.

[0188] Please refer to Figures 4 to 6 , in some embodiments, the second section 42 is configured as a bellows.

[0189] In some embodiments, the second section 42 can be a plastic bellows.

[0190] In some embodiments, the second section 42 can be a metal bellows.

[0191] When the energy storage device 1 is transported or used, external vibrations may be transmitted to the energy storage device 1, causing the second section 42 to shake. In some embodiments, the second section 42 can be a metal bellows or a rigid plastic bellows to reduce the risk of interference between the shaking of the second section 42 and the internal structure of the energy storage device 1.

[0192] In the technical solution of the embodiment of the present application, the bellows can be deformed to change the relative positions of both ends of the bellows. By setting the second section 42 as a bellows, the position of the end of the second section 42 away from the first section 41 is adjusted, which is beneficial to improving the convenience of connecting the second section 42 to other components.

[0193] Please refer to Figure 5 and Figure 6 , and refer to Figure 7 , Figure 7 For Figure 6An enlarged view of part A in [description]. In some embodiments, the sealing structure 50 includes a seal 51 and a support 52. The support 52 and the seal 51 are sleeved around the outer periphery of the connecting pipe 40. Along the vertical direction Y, the seal 51 is disposed between the support 52 and the first tank wall 111, and the support 52 cooperates with the first tank wall 111 to clamp the seal 51.

[0194] In some embodiments, the seal 51 can be made of plastic material.

[0195] In some embodiments, the support 52 can be made of metal material.

[0196] In some embodiments, both the support 52 and the seal 51 can be plate-shaped. The support 52 and the seal 51 can both be sleeved around the outer periphery of the connecting pipe 40. The support 52 can be connected to the connecting pipe 40 by welding or casting, and the seal 51 can be injection-molded around the outer periphery of the connecting pipe 40.

[0197] In some embodiments, in the vertical direction Y, the seal 51 can be disposed above the support 52, and the sealing structure 50 can be disposed on the lower surface of the second wall 1116.

[0198] In some embodiments, the support 52 can be connected to the second wall 1116, and during the connection process, the distance between the support 52 and the second wall 1116 in the vertical direction Y gradually decreases, so that the seal 51 is clamped, and the seal 51 seals the gap between the outer peripheral surface of the connecting pipe 40 and the inner peripheral surface of the through hole.

[0199] The technical solution of the embodiment of the present application clamps the seal 51 through the cooperation of the support 52 and the first tank wall 111, so that the seal 51 can better seal the gap between the connecting pipe 40 and the first tank wall 111, reducing the risk of external liquid entering the first compartment 11 and causing the battery device 21 to short-circuit, which is beneficial to improving the reliability of the energy storage device 1.

[0200] Please refer to Figures 5 to 7 , in some embodiments, the first tank wall 111 is provided with a mounting hole 1119, and the energy storage device 1 further includes a connecting member 70. The connecting member 70 passes through the mounting hole 1119 and is connected to the support 52, so that the support 52 and the first tank wall 111 clamp the seal 51.

[0201] In some embodiments, the first tank wall 111 can be provided with a mounting hole 1119, and the mounting hole 1119 can penetrate through two surfaces of the second wall 1116 in the vertical direction Y.

[0202] Among them, the seal 51 can be provided with a hole passage, and the hole passage can penetrate through two surfaces of the seal 51 in the vertical direction Y.

[0203] The support member 52 may be provided with a blind hole, and a thread is provided in the blind hole.

[0204] The connecting member 70 can be inserted into the mounting hole 1119 and passed through the hole of the sealing member 51 to be threadedly connected to the blind hole of the supporting member 52 , thereby connecting the supporting member 52 and the first box wall 111 , and clamping the sealing member 51 through the supporting member 52 and the first box wall 111 .

[0205] In some embodiments, the connector 70 may be a screw, a bolt, or the like.

[0206] The technical solution of the embodiment of the present application connects the support member 52 and the first box wall 111 through the connecting member 70, which facilitates the connection between the support member 52 and the first box wall 111 to clamp the sealing member 51, reduces the risk of external liquid entering the first compartment 11 and causing a short circuit in the battery device 21, and is beneficial to improving the reliability of the energy storage device 1.

[0207] Please refer to Figures 5 to 7 In some embodiments, the connecting member 70 includes a connecting portion 71 and a fastening portion 72. The connecting portion 71 is inserted into the mounting hole 1119. One end of the connecting portion 71 is threadedly connected to the support member 52, and the other end is matched with the fastening portion 72. There is a gap between the outer surface of the connecting portion 71 and the inner wall surface of the mounting hole 1119, and the fastening portion 72 is limited to the side of the first box wall 111 away from the support member 52.

[0208] In some embodiments, the outer peripheral surface of the connection portion 71 may be provided with threads, the support member 52 may be provided with threaded holes, and the connection portion 71 is threadedly connected to the support member 52 .

[0209] In some embodiments, the fastening portion 72 may be integrally formed with the connecting portion 71 , or the fastening portion 72 may be a nut.

[0210] In some embodiments, the connection portion 71 is passed through the mounting hole 1119 , the fastening portion 72 is connected to one end of the connection portion 71 away from the support member 52 , and abuts against a side of the first box wall 111 away from the support member 52 to achieve positioning of the connection portion 71 .

[0211] In some embodiments, a rivet nut may be provided on the side of the support member 52 away from the fastening portion 72. After the connecting portion 71 is passed through the mounting hole 1119, it is connected to the rivet nut. The fastening portion 72 is limited to the side of the first box wall 111 away from the support member 52, thereby achieving clamping of the sealing member 51.

[0212] In some embodiments, the connecting portion 71 may be cylindrical, the mounting hole 1119 may be a circular hole, and the inner diameter of the mounting hole 1119 may be greater than the outer diameter of the connecting portion 71. When the connecting member 70 is installed, the connecting portion 71 can move within the mounting hole 1119. When the position of the connecting pipe 40 is offset, after driving the support member 52 to offset, the connecting member 70 can adaptively adjust its position within the mounting hole 1119.

[0213] The inner diameter of the mounting hole 1119 may be 10 mm, and the outer diameter of the connecting portion 71 may be 6 mm.

[0214] In the technical solution of the embodiment of the present application, the connecting portion 71 and the limiting portion connect the first box wall 111 and the support member 52, which is beneficial for the support member 52 and the first box wall 111 to clamp the seal member 51. At the same time, by providing a gap between the outer surface of the connecting portion 71 and the inner wall surface of the mounting hole 1119, it is convenient to adjust the installation position of the connecting member 70. Thus, by adjusting the installation position of the support member 52, it is convenient to adjust the installation position of the connecting pipe 40. When the position of the component connected to the connecting pipe 40 is offset or there is a large tolerance, the position of the connecting pipe 40 can be adjusted, which is beneficial to improving the convenience of connecting the connecting pipe 40 to other components.

[0215] Please refer to Figure 3 , in some embodiments, the box body 10 further includes a second compartment 12. The second compartment 12 is located above the first box wall 111. The thermal management module 30 is accommodated in the second compartment 12, and an air outlet 121 is provided on the top wall of the second compartment 12.

[0216] In some embodiments, the second compartment 12 may be located above the first box wall 111. Among them, the second compartment 12 may be located above the first compartment 11.

[0217] In some embodiments, the second compartment 12 may be located above a part of the first compartment 11, another part of the first compartment 11 may be located below the second compartment 12, or another part of the first compartment 11 may be flush with the second compartment 12, or another part of the first compartment 11 may be higher than the second compartment 12 in the vertical direction Y.

[0218] In some embodiments, the thermal management module 30 may include a heat dissipation member. The heat dissipation member may be a fan. The heat dissipation member is correspondingly arranged with the air outlet 121, so as to facilitate the thermal management module 30 to dissipate heat to the outside through the air outlet 121.

[0219] The second compartment 12 may further be provided with an air inlet. The air inlet may be provided on the compartment wall of the second compartment 12. Among them, the air inlet may be provided on the side wall of the second compartment, and the side wall is adjacent to the first compartment 11, so that the inside of the second compartment 12 is communicated with the outside.

[0220] In the technical solution of the embodiment of the present application, by arranging the thermal management module 30 in the second compartment 12 and separating the thermal management module 30 from the outside through the compartment wall of the second compartment 12, the risk of damage to the thermal management module 30 is reduced, and the reliability of the energy storage device 1 is improved.

[0221] In some embodiments, the air outlet 121 can communicate the inside and the outside of the second compartment 12.

[0222] In some embodiments, the second compartment 12 can be provided with an air outlet 121. The air outlet 121 can be arranged on the box wall of the second compartment 12, and the air outlet 121 communicates with two surfaces of the box wall in its thickness direction.

[0223] In some embodiments, the air outlet 121 can be arranged on the box wall of the second compartment 12 opposite to the first box wall 111 in the vertical direction Y.

[0224] In the technical solution of the embodiment of the present application, by arranging the air outlet 121 in the second compartment 12, the heat dissipation effect of the thermal management module 30 is improved, which is beneficial to improving the heat exchange effect between the thermal management module 30 and the battery device 21, and thus beneficial to improving the reliability of the energy storage device 1.

[0225] The following introduces the energy storage device 1 of the second aspect embodiment.

[0226] Please refer to Figure 8 and Figure 9 , Figure 8 which are schematic diagrams of the energy storage device provided by other embodiments of the present application. Figure 9 which is a schematic diagram of the connecting pipe passing through the first box wall provided by other embodiments of the present application. The embodiment of the present application also provides an energy storage device 1, which includes a heat preservation member 60, a box body 10, an electrical component 22, a thermal management module 30, a sealing structure 50 and a connecting pipe 40. The box body 10 includes a first compartment 11, and the first compartment 11 includes a first box wall 111. At least part of the electrical component 22 is arranged in the first compartment 11. The electrical component 22 includes a battery device 21 and a control module 20, and the control module 20 is used for electrically controlling the battery device 21. The thermal management module 30 is used for regulating the temperature of the battery device 21. The connecting pipe 40 penetrates through the first box wall 111. The connecting pipe 40 connects the battery device 21 and the thermal management module 30, and the connecting pipe 40 conveys the coolant. The sealing structure 50 is used for sealing the gap between the connecting pipe 40 and the first box wall 111. Among them, the first box wall 111 includes a partition wall 1113, and the partition wall 1113 is arranged inside the first box wall 111 to divide the internal space of the first box wall 111 into a first cavity 1111 and a second cavity 1112. The heat preservation member 60 is arranged in the first cavity 1111, and at least part of the connecting pipe 40 is located in the second cavity 1112. The connecting pipe 40 located in the second cavity 1112 is arranged at an interval from the partition wall 1113.

[0227] In some embodiments, the first compartment 11 may have a cuboid structure, and the first box wall 111 may be any one of the box walls of the first compartment 11. For example, the first box wall 111 may be the box wall of the first compartment 11 in the length direction, and the portion of the connecting pipe 40 located in the second cavity 1112 may extend along the length direction of the first compartment 11; or the first box wall 111 may be the box wall of the first compartment 11 in the width direction, and the portion of the connecting pipe 40 located in the second cavity 1112 may extend along the width direction of the first compartment 11; or the first box wall 111 may be the box wall of the first compartment 11 in the height direction, and the portion of the connecting pipe 40 located in the second cavity 1112 may extend along the height direction of the first compartment 11. That is, the extending direction of the portion of the connecting pipe 40 located in the second cavity 1112 may be parallel to the thickness direction of the first box wall 111.

[0228] It should be noted that, compared with the embodiments of the first aspect, in the embodiments of the second aspect, except for the extending direction of the connecting pipe 40 and the position of the first box wall 111 being different, the structure of the energy storage device 1 here and in the following text is the same as the structure of the energy storage device 1 in the embodiments of the first aspect above. The parts that are the same as those in the embodiments of the first aspect in the following text will not be described otherwise. Among them, the vertical direction Y in the embodiments of the first aspect is replaced by the thickness direction of the first box wall 111 in the embodiments of the second aspect.

[0229] In the technical solution of the embodiments of the present application, the battery device 21 will cause the temperature to rise during the charge and discharge cycle. When the temperature is too high, there is a risk of affecting the charge and discharge of the battery device 21 and causing thermal runaway of the battery device 21. By connecting the battery device 21 and the thermal management module 30 through the connecting pipe 40, the temperature of the battery device 21 is adjusted, which is beneficial to improving the reliability of the energy storage device 1. By arranging the heat insulation member 60 in the first cavity 1111, the inside and outside of the first compartment 11 are separated by the heat insulation member 60, so that less heat exchange occurs between the outside and the inside of the first compartment 11, reducing the temperature outside the first compartment 11 from affecting the temperature inside the first compartment 11, thereby reducing the influence of the temperature on the battery device 21, which is beneficial to improving the reliability of the energy storage device 1. The connecting pipe 40 conveys the coolant, and the temperature inside the connecting pipe 40 is relatively low. When the outer surface of the connecting pipe 40 comes into contact with the air, condensed water will be generated on the outer surface of the connecting pipe 40. A part of the connecting pipe 40 is located in the second cavity 1112. The first cavity 1111 and the second cavity 1112 are separated by the partition wall 1113, and the connecting pipe 40 and the partition wall 1113 are arranged at intervals, reducing the risk that the condensed water generated on the outer surface of the connecting pipe 40 penetrates into the first cavity 1111 through the partition wall 1113, and reducing the risk that the condensed water wets the heat insulation member 60 and thus affects the heat insulation effect of the heat insulation member 60, which is beneficial to improving the reliability of the energy storage device 1.

[0230] Please refer to Figure 8 andFigure 9 , and with reference to Figure 11 , Figure 11 FIG. 5 is a schematic structural view of the first box wall provided for some other embodiments of the present application. In some embodiments, the first box wall 111 further includes a first wall 1115 and a second wall 1116, and the first wall 1115 and the second wall 1116 are oppositely arranged along the thickness direction of the first box wall 111. One end of the partition wall 1113 is connected to the first wall 1115, and the other end is connected to the second wall 1116. The partition wall 1113 has a first surface 1113a facing the connecting pipe 40 and a second surface 1113b facing away from the connecting pipe 40. The first surface 1113a and the second wall 1116 form a second cavity 1112, and the second surface 1113b, the first wall 1115 and the second wall 1116 form a first cavity 1111.

[0231] In the technical solution of the embodiment of the present application, the second cavity 1112 is formed by the partition wall 1113 and the second wall 1116, the first cavity 1111 is formed by the partition wall 1113, the first wall 1115 and the second wall 1116, and the first surface 1113a of the partition wall 1113 is spaced from the connecting pipe 40, reducing the risk that the condensate water on the surface of the connecting pipe 40 wets the heat preservation member 60 and thus affects the heat insulation effect of the heat preservation member 60, which is beneficial to improving the reliability of the energy storage device 1.

[0232] Please refer to Figure 9 and Figure 11 , in some embodiments, the first box wall 111 further includes a reinforcing wall 1118, the reinforcing wall 1118 is arranged in the second cavity 1112, and the reinforcing wall 1118 is connected to at least two inner wall surfaces of the second cavity 1112.

[0233] In the technical solution of the embodiment of the present application, by arranging the reinforcing wall 1118 in the second cavity 1112, it is beneficial to improve the structural strength of the first box wall 111, reduce the risk of damage to the battery cell caused by the damage of the first box wall 111, and is beneficial to improving the reliability of the energy storage device 1.

[0234] Please refer to Figure 9 and Figure 11 , in some embodiments, the number of the connecting pipes 40 is two. One of the two connecting pipes 40 is used for the thermal management module 30 to deliver the coolant to the battery device 21, and the other is used for the battery device 21 to deliver the coolant to the thermal management module 30. The two connecting pipes 40 are spaced apart, and the reinforcing wall 1118 separates the two connecting pipes 40.

[0235] In the technical solution of the embodiment of the present application, the two connecting pipes 40 are separated by the reinforcing wall 1118. On the one hand, when installing the connecting pipes 40, the two connecting pipes 40 can be respectively installed in the corresponding spaces, reducing the risk that the two connecting pipes 40 affect each other during installation and thus affecting the installation, which is beneficial to improving the convenience of installation; on the other hand, during the use or transportation of the energy storage device 1, the two connecting pipes 40 are respectively located in the corresponding spaces, reducing the risk that the two connecting pipes 40 interfere with each other and cause damage to the connecting pipes 40, which is beneficial to improving the reliability of the energy storage device 1.

[0236] Please refer to Figure 9 and Figure 11 and refer to Figure 10 , Figure 10 which is a schematic assembly diagram of the sealing structure and the connecting pipe provided by other embodiments of the present application. In some embodiments, the connecting pipe 40 includes an adjusting section 43. The adjusting section 43 is located in the first compartment 11 and is connected to the battery device 21. The adjusting section 43 is configured to be deformable to change the position of the end of the connecting pipe 40 away from the thermal management module 30.

[0237] In some embodiments, the adjusting section 43 and the other parts of the connecting pipe 40 can be connected by quick insertion or interference fit.

[0238] In some embodiments, the forming method of the connecting pipe 40 can be injection molding the adjusting section 43 at one end of the other part of the connecting pipe 40, or casting the other part of the connecting pipe 40 at one end of the adjusting section 43.

[0239] In some embodiments, the adjusting section 43 can extend along the thickness direction of the first box wall 111. The adjusting section 43 can be deformed so that after one end of the adjusting section 43 is connected to the other part of the connecting pipe 40, it deforms in a direction perpendicular to the thickness direction of the first box wall 111, so that the position of the end of the adjusting section 43 away from the other part of the connecting pipe 40 changes.

[0240] In some embodiments, the adjusting section 43 can be a bellows, a metal hose or a plastic hose.

[0241] In the technical solution of the embodiment of the present application, by deforming the adjusting section 43, the position of the adjusting section 43 can be changed. When the position of the component connected to the adjusting section 43 is offset or there is a large tolerance, the adjusting section 43 can be deformed, thereby adjusting the position of the adjusting section 43, which is beneficial to improving the convenience of connecting the adjusting section 43 to other components.

[0242] Please refer to Figures 9 to 11 , in some embodiments, the adjusting section 43 is configured as a bellows.

[0243] In some embodiments, the adjusting section 43 can be a plastic bellows.

[0244] In some embodiments, the adjusting section 43 may be a metal bellows.

[0245] During the transportation or use of the energy storage device 1, external vibrations may be transmitted to the energy storage device 1, causing the adjusting section 43 to shake. In some embodiments, the adjusting section 43 may be a metal bellows or a rigid plastic bellows to reduce the risk of interference between the shaking of the adjusting section 43 and the internal structure of the energy storage device 1.

[0246] In the technical solution of the embodiment of the present application, the bellows can deform to change the relative positions of both ends of the bellows. By setting the adjusting section 43 as a bellows, the position of the adjusting section 43 can be adjusted, which is beneficial to improving the convenience of connecting the adjusting section 43 with other components.

[0247] Please refer to Figure 9 and Figure 11 , in some embodiments, the first box wall 111 has a first opening 1114, and the first opening 1114 communicates with the second cavity 1112.

[0248] In the technical solution of the embodiment of the present application, the sealing structure 50 is arranged in the second cavity 1112. By providing the first opening 1114 communicating with the second cavity 1112 on the first box wall 111, an operating space is provided for the installation of the sealing structure 50, which is beneficial to improving the convenience of installing the sealing structure 50.

[0249] Please refer to Figure 10 and Figure 11 , and refer to Figure 12 , Figure 12 is Figure 11 the enlarged view of B in . In some embodiments, the sealing structure 50 includes a seal 51 and a support 52. The support 52 and the seal 51 are sleeved around the outer periphery of the connecting pipe 40. Along the thickness direction of the first box wall 111, the seal 51 is arranged between the support 52 and the first box wall 111, and the support 52 cooperates with the first box wall 111 to clamp the seal 51.

[0250] In the technical solution of the embodiment of the present application, by clamping the seal 51 with the cooperation of the support 52 and the first box wall 111, the seal 51 can better seal the gap between the connecting pipe 40 and the first box wall 111, reducing the risk of external liquid entering the first compartment 11 and causing the battery device 21 to short-circuit, which is beneficial to improving the reliability of the energy storage device 1.

[0251] Please refer to Figure 12In some embodiments, the first box wall 111 is provided with a mounting hole 1119 , and the energy storage device 1 further includes a connecting member 70 , which is passed through the mounting hole 1119 and connected to the supporting member 52 , so that the supporting member 52 and the first box wall 111 clamp the sealing member 51 .

[0252] The technical solution of the embodiment of the present application connects the support member 52 and the first box wall 111 through the connecting member 70, which facilitates the connection between the support member 52 and the first box wall 111 to clamp the sealing member 51, reduces the risk of external liquid entering the first compartment 11 and causing a short circuit in the battery device 21, and is beneficial to improving the reliability of the energy storage device 1.

[0253] Please refer to Figures 10 to 12 In some embodiments, the connecting member 70 includes a connecting portion 71 and a fastening portion 72. The connecting portion 71 is inserted into the mounting hole 1119. One end of the connecting portion 71 is threadedly connected to the support member 52, and the other end is matched with the fastening portion 72. There is a gap between the outer surface of the connecting portion 71 and the inner wall surface of the mounting hole 1119, and the fastening portion 72 is limited to the side of the first box wall 111 away from the support member 52.

[0254] The technical solution of the embodiment of the present application connects the first box wall 111 and the support member 52 through the connection part 71 and the limit part, which is conducive to the support member 52 and the first box wall 111 clamping the sealing member 51. At the same time, by providing a gap between the outer surface of the connection part 71 and the inner wall surface of the mounting hole 1119, it is convenient to adjust the installation position of the connection member 70, thereby facilitating the adjustment of the installation position of the connecting pipe 40 by adjusting the installation position of the support member 52. When the position of the component connected to the connecting pipe 40 is offset or there is a large tolerance, the position of the connecting pipe 40 can be adjusted, which is conducive to improving the convenience of connecting the connecting pipe 40 with other components.

[0255] Please refer to Figure 2 The embodiment of the present application further provides an energy storage system 200, which includes an energy storage converter and the energy storage device 1 provided in any of the above embodiments, and the energy storage converter is used to electrically connect the power generation device 220 and the energy storage device 1.

[0256] Please refer to Figure 1 The embodiment of the present application further provides a charging network, the charging network 100 includes a charging pile 110 and an energy storage device 1 provided in any of the above embodiments, and the energy storage device 1 is used to provide electrical energy to the charging pile 110.

[0257] In some embodiments, the energy storage device 1 includes a box body 10, electrical components 22, a thermal management module 30, and a connecting pipe 40. The box body 10 includes a first compartment 11, and the first compartment 11 includes a first box wall 111. At least part of the electrical components 22 is disposed in the first compartment 11. The electrical components 22 include a battery device 21 and a control module 20, and the control module 20 is configured to perform electrical control on the battery device 21. The thermal management module 30 is located above the first box wall 111 and outside the first compartment 11, and the thermal management module 30 is configured to adjust the temperature of the battery device 21. The connecting pipe 40 passes through the first box wall 111 in the vertical direction Y, and the connecting pipe 40 connects the battery device 21 and the thermal management module 30, and the connecting pipe 40 is used to convey a coolant. Wherein, the energy storage device 1 further includes a sealing structure 50, and the sealing structure 50 is configured to seal the gap between the connecting pipe 40 and the first box wall 111.

[0258] In some embodiments, the control module 20 and the battery device 21 are arranged in the horizontal direction X. The control module 20 is located directly below the first box wall 111, and the battery device 21 is located on the side of the first box wall 111. In the vertical direction Y, a part of the battery device 21 is located above the first box wall 111, and a part of the battery device 21 is located below the first box wall 111.

[0259] The technical solution of the embodiment of the present application, by arranging the thermal management module 30 above the first box wall 111, enables the thermal management module 30 to share the occupied space with the box body 10, which is beneficial to saving the floor area of the energy storage device 1. The battery device 21 will cause the temperature to rise during the charge and discharge cycle. When the temperature is too high, there is a risk of affecting the charge and discharge of the battery device 21 and causing thermal runaway of the battery device 21. By connecting the battery device 21 and the thermal management module 30 through the connecting pipe 40, the temperature of the battery device 21 is adjusted, which is beneficial to improving the reliability of the energy storage device 1. The coolant after heat exchange with the battery device 21 usually flows back to the thermal management module 30, and the thermal management module 30 needs to communicate with the outside to facilitate the heat dissipation of the thermal management module 30. By using the sealing structure 50 to seal the gap between the connecting pipe 40 and the first box wall 111, the risk of external liquid entering the first compartment 11 and causing a short circuit of the battery device 21 is reduced, which is beneficial to improving the reliability of the energy storage device 1.

[0260] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and components therein can be replaced with equivalents. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, Comprising: A box body, including a first compartment, and the first compartment includes a first box wall; Electrical components, at least partially disposed in the first compartment, and the electrical components include a battery device and a control module, and the control module is used for electrically controlling the battery device; A thermal management module, located above the first box wall, and the thermal management module is located outside the first compartment, and the thermal management module is used for regulating the temperature of the battery device; A connecting pipe, passing through the first box wall in the vertical direction, and the connecting pipe connects the battery device and the thermal management module, and the connecting pipe is used for conveying a coolant; Wherein, the energy storage device further includes a sealing structure, and the sealing structure is used for sealing the gap between the connecting pipe and the first box wall.

2. The energy storage device according to claim 1, wherein The energy storage device further includes a heat insulation member, a first cavity is formed inside the first box wall, and the heat insulation member is disposed in the first cavity.

3. The energy storage device according to claim 2, wherein, A second cavity is formed inside the first box wall, the first box wall includes a partition wall, and the partition wall separates the first cavity and the second cavity; A part of the connecting pipe is located in the second cavity, and the connecting pipe is spaced apart from the partition wall.

4. The energy storage device according to claim 3, characterized in that, The first box wall is provided with a first opening, the first opening communicates with the second cavity, and the sealing structure is disposed in the second cavity.

5. The energy storage device according to claim 4, wherein The first box wall further includes a first wall and a second wall, the first wall and the second wall are oppositely arranged in the vertical direction and the first wall is located below the second wall, and the first opening is provided on the first wall; The partition wall surrounds the periphery of the first opening, one end of the partition wall is connected to the first wall, the other end is connected to the second wall, the partition wall has a first surface facing the connecting pipe and a second surface facing away from the connecting pipe, the first surface is spaced apart from the connecting pipe, the first surface and the second wall form the second cavity, and the second surface, the first wall and the second wall form the first cavity.

6. The energy storage device according to claim 3, wherein The first box wall further includes a reinforcing wall, the reinforcing wall is disposed in the second cavity, and the reinforcing wall connects at least two inner wall surfaces of the second cavity.

7. The energy storage device according to claim 6, wherein The number of the connecting pipes is two, one of the two connecting pipes is used for the thermal management module to convey the coolant to the battery device, the other is used for the battery device to convey the coolant to the thermal management module, the two connecting pipes are spaced apart, and the reinforcing wall separates the two connecting pipes.

8. The energy storage device according to claim 1, wherein The connecting pipe includes a first section and a second section connected to each other, the first section passes through the first box wall in the vertical direction, the second section is located in the first compartment, and the second section is configured to be deformable to change the position of the end of the second section away from the first section.

9. The energy storage device according to claim 8, wherein The second section is configured as a corrugated pipe.

10. The energy storage device according to claim 1, characterized in that, The sealing structure includes a sealing member and a support member, the support member and the sealing member are sleeved on the outer periphery of the connecting pipe, in the vertical direction, the sealing member is disposed between the support member and the first box wall, and the support member cooperates with the first box wall to clamp the sealing member.

11. The energy storage device according to claim 10, characterized in that, The first box wall is provided with a mounting hole, and the energy storage device further comprises a connecting member, which is passed through the mounting hole and connected to the supporting member, so that the supporting member and the first box wall clamp the sealing member.

12. The energy storage device according to claim 11, wherein, The connecting member comprises a connecting portion and a fastening portion, wherein the connecting portion is inserted into the mounting hole, one end of the connecting portion is threadedly connected to the supporting member, and the other end is matched with the fastening portion; There is a gap between the outer surface of the connecting portion and the inner wall surface of the mounting hole, and the fastening portion is located on a side of the first box wall away from the supporting member.

13. The energy storage device according to claim 1, wherein The box body also includes a second compartment, which is located above the first box wall. The thermal management module is accommodated in the second compartment, and an air outlet is provided on the top wall of the second compartment.

14. An energy storage device, characterized in that, include: Insulation parts; The box body comprises a first compartment, wherein the first compartment comprises a first box wall; an electrical component, at least partially disposed in the first compartment, the electrical component comprising a battery device and a control module, the control module being used to electrically control the battery device; a thermal management module, for regulating the temperature of the battery device; A connecting pipe, which is passed through the first box wall, and connects the battery device and the thermal management module, and is used to transport a coolant; A sealing structure, used for sealing the gap between the connecting pipe and the first box wall; Wherein, the first box wall includes a partition wall, which is arranged inside the first box wall to divide the internal space of the first box wall into a first cavity and a second cavity, the thermal insulation component is arranged in the first cavity, at least part of the connecting pipe is located in the second cavity, and the connecting pipe located in the second cavity is spaced apart from the partition wall.

15. The energy storage device according to claim 14, wherein, The first box wall further comprises a first wall and a second wall, wherein the first wall and the second wall are arranged opposite to each other along the thickness direction of the first box wall; One end of the partition wall is connected to the first wall, and the other end is connected to the second wall. The partition wall has a first surface facing the connecting tube and a second surface facing away from the connecting tube. The first surface and the second wall form the second cavity, and the second surface, the first wall and the second wall form the first cavity.

16. The energy storage device according to claim 14, wherein The first box wall further includes a reinforcing wall, which is disposed in the second cavity and connects at least two inner wall surfaces of the second cavity.

17. The energy storage device according to claim 16, characterized in that, There are two connecting tubes, one of which is used for the thermal management module to transport coolant to the battery device, and the other is used for the battery device to transport coolant to the thermal management module. The two connecting tubes are arranged at intervals, and the reinforcing wall separates the two connecting tubes.

18. The energy storage device according to claim 14, characterized in that, The connecting pipe includes an adjusting section, which is located in the first compartment and connected to the battery device. The adjusting section is configured to be deformable to change the position of an end of the connecting pipe away from the thermal management module.

19. The energy storage device according to claim 18, wherein, The regulating section is configured as a bellows.

20. The energy storage device according to claim 14, characterized in that, The first box wall has a first opening, and the first opening is communicated with the second cavity.

21. The energy storage device according to claim 20, wherein The sealing structure includes a sealing member and a supporting member, wherein the supporting member and the sealing member are sleeved around the outer periphery of the connecting pipe, and along the thickness direction of the first box wall, the sealing member is arranged between the supporting member and the first box wall, and the supporting member cooperates with the first box wall to clamp the sealing member.

22. The energy storage device according to claim 21, wherein The first box wall is provided with a mounting hole, and the energy storage device further comprises a connecting member, which is passed through the mounting hole and connected to the supporting member, so that the supporting member and the first box wall clamp the sealing member.

23. The energy storage device according to claim 22, wherein, The connecting member comprises a connecting portion and a fastening portion, wherein the connecting portion is inserted into the mounting hole, one end of the connecting portion is threadedly connected to the supporting member, and the other end is matched with the fastening portion; There is a gap between the outer surface of the connecting portion and the inner wall surface of the mounting hole, and the fastening portion is located on a side of the first box wall away from the supporting member.

24. An energy storage system, characterized in that, include: Energy storage converter; The energy storage device according to any one of claims 1 to 23, wherein the energy storage converter is used to electrically connect the power generation device and the energy storage device.

25. A charging network, characterized in that, include: Charging stations; An energy storage device as described in any one of claims 1 to 23, wherein the energy storage device is used to provide electrical energy to the charging pile.

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