Energy storage device, energy storage system and charging network

Abstract

The utility model relates to an energy storage device, an energy storage system and a charging network. The energy storage device comprises a box body; the conveying pipeline is arranged in the box body in a penetrating manner; the flexible connecting piece is provided with a first connecting end connected with the box body and a second connecting end connected with the conveying pipeline, and a bending part is arranged between the first connecting end and the second connecting end; the flexible connecting piece is arranged on the periphery of the conveying pipeline in a winding mode, and the inner diameter of the flexible connecting piece is gradually decreased from the first connecting end to the second connecting end. And the bending part is configured to provide a moving space for relative movement between the conveying pipeline and the box body. The flexible connecting piece is connected between the box body and the conveying pipeline, the bending part is arranged between the first connecting end and the second connecting end of the flexible connecting piece, the manufacturing tolerance between the box body and the conveying pipeline can be absorbed through the bending part, the conveying pipeline can move relative to the box body, and therefore the connecting stability and the connecting sealing performance are improved.

Description

Technical Field

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

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

[0003] In the structure of energy storage devices, pipelines are required to transport heat exchange media such as coolant. However, in current energy storage devices, misalignment and other deviations in pipeline connections are prone to occur, affecting the sealing performance of the connections. Utility Model Content

[0004] Therefore, it is necessary to provide an energy storage device, energy storage system, and charging network to address the problem that misalignment and other deviations in the connections of pipelines in current energy storage devices can easily affect the sealing performance of the connections.

[0005] In a first aspect, this application provides an energy storage device, including a housing, a delivery pipeline, and a flexible connector, wherein the delivery pipeline passes through the housing; the flexible connector has a first connecting end connected to the housing and a second connecting end connected to the delivery pipeline, and a bend is provided between the first connecting end and the second connecting end; the flexible connector is arranged around the outer periphery of the delivery pipeline, and the inner diameter of the flexible connector decreases from the first connecting end to the second connecting end; wherein the bend is configured to provide movement space for the relative movement between the delivery pipeline and the housing.

[0006] Therefore, through the above structure, the flexible connector can achieve a flexible connection between the conveying pipeline and the housing, and the bending part absorbs the manufacturing tolerances between the housing and the conveying pipeline, allowing the conveying pipeline to move relative to the housing, thereby improving the connection stability and sealing performance.

[0007] In addition, the flexible connector can absorb both axial and radial deviations between the conveying pipeline and the housing, further improving the connection stability and sealing between the conveying pipeline and the housing.

[0008] In some embodiments, the bends include a plurality of bends, which are sequentially connected and arranged along the axial direction of the delivery pipeline.

[0009] Therefore, the above structure can further improve the absorption efficiency of the bending part for manufacturing tolerances between the housing and the conveying pipeline, and make the connection between the conveying pipeline and the housing more flexible while improving the connection stability and sealing between the conveying pipeline and the housing.

[0010] In some embodiments, the tensile strength of the flexible connector ranges from 3 MPa to 50 MPa. Thus, by setting the tensile strength of the flexible connector within this range, the conveying pipeline and the housing can be effectively connected, and the conveying pipeline can move stably relative to the housing.

[0011] In some embodiments, the flexible connector is constructed as a soft rubber component. Thus, the flexible connector not only provides a sealed connection between the delivery pipeline and the housing, but also allows for movement of the delivery pipeline relative to the housing, effectively absorbing manufacturing tolerances between the delivery pipeline and the housing.

[0012] In some embodiments, the flexible connector is made of any one of thermoplastic polyurethane elastomer, thermoplastic polyester elastomer, thermoplastic polyolefin elastomer, styrene block copolymer, thermoplastic vulcanized rubber, EPDM rubber, natural rubber, and chloroprene rubber.

[0013] In this way, the flexible connector can not only achieve a sealed connection between the conveying pipeline and the housing, but also effectively absorb the manufacturing tolerances between the conveying pipeline and the housing, thus achieving a stable and flexible connection between the conveying pipeline and the housing.

[0014] In some embodiments, the energy storage device further includes a connector that is detachably connected to the housing, and a first connection end is connected to the connector.

[0015] The above structure enables a smooth connection between the conveying pipeline and the housing, and ensures that the flexible connector is stably and sealed between the conveying pipeline and the housing.

[0016] In some embodiments, a first limiting groove is formed on the end face of the first connecting end, and a first buckle is formed at the end of the connector, the first buckle engaging with the first limiting groove; and / or, a second limiting groove is formed on the end face of the second connecting end, and a second buckle is formed by protruding from the outer peripheral surface of the conveying pipeline, the second buckle engaging with the second limiting groove.

[0017] Thus, the above structure enables a quick and stable sealed connection between the flexible connector and the delivery pipeline and the housing.

[0018] In some embodiments, the energy storage device further includes fasteners, with the first connection end connected to the connector via fasteners; and / or, the second connection end connected to the delivery pipeline via fasteners.

[0019] The above structure allows for a more convenient and quicker sealing connection between the flexible connector and the delivery pipeline.

[0020] In some embodiments, the pipeline includes a pipeline body and an insulation layer, wherein the interior of the pipeline body forms a transport channel for transporting the heat exchange medium, and the insulation layer is wrapped around the outer periphery of the pipeline body.

[0021] Therefore, the above structure can reduce the heat exchange between the heat exchange medium inside the conveying channel and the external environment, reduce the impact of the external environment on the heat exchange medium, and improve the heat exchange efficiency.

[0022] Secondly, this application also provides an energy storage system, including the energy storage device described above.

[0023] Thirdly, this application also provides a charging network including the energy storage device described above.

[0024] The aforementioned energy storage device, energy storage system, and charging network are connected between the housing and the delivery pipeline via flexible connectors. A bend is provided between the first and second connecting ends of the flexible connector, which can absorb the manufacturing tolerances between the housing and the delivery pipeline, allowing the delivery pipeline to move relative to the housing, thereby improving connection stability and sealing performance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an energy storage system according to one or more embodiments.

[0026] Figure 2 This is a schematic diagram of the structure of an energy storage submodule according to one or more embodiments.

[0027] Figure 3 This is a schematic diagram of the assembly structure of the housing and delivery pipeline in an energy storage device according to one or more embodiments.

[0028] Figure 4 This is an assembly cross-sectional view of the housing and delivery pipeline in an energy storage device according to one or more embodiments.

[0029] Figure 5 This is an assembly cross-sectional view of the housing and delivery pipeline in an energy storage device according to one or more embodiments.

[0030] Explanation of reference numerals in the attached drawings: 101, Monitoring backend; 102, System controller; 103, Energy storage submodule; 104, Battery management controller; 105, Submodule controller; 10, Energy storage device; 11, Delivery pipeline; 12, Flexible connector; 13, Connector; 14, Fastener; 111, Second snap-fit; 112, Pipeline body; 113, Insulation layer; 114, Delivery channel; 121, First connection end; 122, Second connection end; 123, Bending part; 124, First limiting groove; 125, Second limiting groove; 131, First snap-fit. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0037] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0038] Energy storage devices typically include a housing, a thermal management module, connecting pipes, and a battery unit. Both the battery unit and the thermal management module are housed within the housing. The connecting pipes connect the battery unit and the thermal management module to facilitate the exchange of coolant between the thermal management module and the battery unit, allowing the thermal management module to regulate the temperature of the battery unit.

[0039] The battery device can be a battery module, or when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module. The battery device can also be a battery pack, which includes a housing and battery cells, with the battery cells or battery modules housed in the housing.

[0040] Energy storage devices are used in energy storage systems, specifically, such as Figure 1As shown, the energy storage system includes a monitoring backend 101, a system controller (Valve Base Controller, VBC) 102, multiple energy storage sub-modules 103, a battery management controller (BMC) 104 and a sub-module controller (SMC) 105 corresponding to each energy storage sub-module (SM) 103. The battery management controller 104 and the sub-module controller 105 are connected in a one-to-one communication manner. The monitoring backend 101 is connected to the system controller 102 and each battery management controller 104, and the system controller 102 is also connected to each sub-module controller 105. The battery management controller 104 is used to obtain the status information of the corresponding energy storage sub-module 103. The sub-module controller 105 is used to control the corresponding energy storage sub-module 103. The monitoring backend 101 is used for status monitoring. The system controller 102 is used to obtain the communication status of each communication path in the energy storage system and perform corresponding processing actions according to the communication status.

[0041] In this embodiment of the application, the energy storage system includes multiple energy storage submodules 103. Each energy storage submodule 103 can be composed of multiple electrical cabinets connected in series and / or in parallel. Each electrical cabinet can be composed of multiple electrical boxes connected in series and / or in parallel. Each electrical box can be composed of multiple batteries connected in series and / or in parallel. Figure 2 As shown.

[0042] The energy storage system also includes a battery management controller 104 corresponding to the energy storage submodule 103. The battery management controller 104 can collect the status information of the corresponding energy storage submodule 103 and is responsible for detecting the battery's status, performance, and health status. The aforementioned status information may include voltage, current, temperature, state of charge / discharge, state of charge (SOC), state of health (SOH), etc.

[0043] The energy storage system also includes submodule controllers 105 that are communicatively connected to the battery management controller 104. The battery management controller 104 can transmit the collected status information to the submodule controllers 105, and the submodule controllers 105 can also transmit control commands to the battery management controller 104, thereby controlling the corresponding energy storage submodules 103. For example, controlling the energy storage submodules 103 to enter or leave the energy storage system, and also controlling the charging and discharging of the energy storage submodules 103.

[0044] The energy storage system also includes a system controller 102 and a monitoring backend 101. The system controller 102 is communicatively connected to multiple submodule controllers 105 and the monitoring backend 101, respectively. The monitoring backend 101 is also communicatively connected to multiple battery management controllers 104. The system controller 102 can obtain status information collected by the battery management controllers 104 through the submodule controllers 105 and transmit the status information to the monitoring backend 101. The system controller 102 can also obtain status information collected by the battery management controllers 104 through the monitoring backend 101. The system controller 102 can send control commands to the submodule controllers 105 based on the status information, thereby controlling each energy storage submodule 103. The system controller 102 can determine the communication status of each communication path and take corresponding actions when a communication failure occurs. The monitoring backend 101 can monitor the status of the system controller 102 through communication with the system controller 102, and can also monitor the status of the battery management controllers 104 through communication with them. The monitoring backend 101 is mainly used for monitoring status. In some embodiments, the monitoring backend 101 and the system controller 102 can be integrated as two components into a single hardware device.

[0045] It should be noted that during the operation of energy storage devices, the battery unit generates heat. Therefore, a pipeline structure is required to deliver heat exchange media such as coolant to the battery unit. However, both the pipeline structure and the casing have certain manufacturing tolerances. This can easily lead to misalignment of the connection positions when the pipeline and the casing are connected, affecting the sealing performance of the connection.

[0046] Based on the above considerations, in order to solve the problem that misalignment and other deviations are prone to occur in the connection of pipelines in current energy storage devices, affecting the connection sealing performance, one or more embodiments of this application provide an energy storage device that is connected between the housing and the delivery pipeline by a flexible connector. A bend is provided between the first and second connecting ends of the flexible connector. The bend can absorb the manufacturing tolerances between the housing and the delivery pipeline, allowing the delivery pipeline to move relative to the housing, thereby improving the connection stability and connection sealing performance.

[0047] See Figure 3 and Figure 4 One embodiment of this application provides an energy storage device 10, including a housing (not shown in the figure), a delivery pipeline 11, and a flexible connector 12. The delivery pipeline 11 passes through the housing, and the flexible connector 12 has a first connecting end 121 connected to the housing and a second connecting end 122 connected to the delivery pipeline 11. A bend 123 is provided between the first connecting end 121 and the second connecting end 122. The bend 123 is configured to provide movement space for the relative movement between the delivery pipeline 11 and the housing.

[0048] It should be noted that the energy storage device 10 can be applied to a charging network, which typically includes charging piles. The charging piles can be used to charge electrical equipment, and the energy storage device 10 is electrically connected to the charging piles to provide power to them.

[0049] Specifically, the charging pile and the battery device in the energy storage device 10 are electrically connected via a cable, and the battery device can supply the electrical energy it stores to the charging pile. In a charging network, there can be one, two, or more charging piles.

[0050] The energy storage device 10 typically includes a housing and a battery pack housed within the housing. The housing provides a space for the battery pack and offers some protection. Understandably, the energy storage device 10 may also include electrical components and a thermal management module to enable the storage and transmission of electrical energy.

[0051] Furthermore, the battery device generates a certain amount of heat during operation, and excessively high or low internal temperatures will affect the performance of the battery device.

[0052] Therefore, it is usually necessary to set up a delivery pipeline 11 to deliver heat exchange medium such as coolant into the box to exchange heat with the battery device, so as to keep the battery device in a suitable temperature range and improve its performance.

[0053] One end of the delivery pipeline 11 is located outside the housing and connected to an external rigid pipeline to form a closed heat exchange medium loop. The other end of the delivery pipeline 11 passes through the housing wall and is connected to the battery device to deliver the heat exchange medium to a designated location on the battery device, thereby achieving heat exchange for the battery device.

[0054] Under these conditions, this application provides a flexible connector 12, which connects the housing and the conveying pipeline 11. The first connecting end 121 of the flexible connector 12 is connected to the housing, and the second connecting end 122 is connected to the conveying pipeline 11. A bend 123 is formed between the first connecting end 121 and the second connecting end 122. The bend 123 provides a certain amount of space for the conveying pipeline 11 to move relative to the housing, thereby eliminating manufacturing tolerances during installation and enabling a faster and more stable connection between the conveying pipeline 11 and the housing, improving the sealing performance of the connection.

[0055] Thus, through the above structure, the flexible connector 12 can achieve a flexible connection between the conveying pipeline 11 and the box, and the bending part 123 absorbs the manufacturing tolerance between the box and the conveying pipeline 11, allowing the conveying pipeline 11 to move relative to the box, thereby improving the connection stability and connection sealing performance.

[0056] In some embodiments, the bends 123 include a plurality of bends, and each bend 123 is arranged sequentially along the axial direction of the conveying pipeline 11.

[0057] Specifically, the bending portion 123 can be one or more, and the multiple bending portions 123 can be connected and arranged sequentially along the axial direction of the conveying pipeline 11. In this way, the multiple bending portions 123 can better absorb the manufacturing tolerances between the housing and the conveying pipeline 11, making the connection between the conveying pipeline 11 and the housing more flexible.

[0058] Understandably, the specific number of bends 123 can be adjusted according to actual needs. For example, it can be adjusted according to the specific tolerance between the conveying pipeline 11 and the box, or according to the size of the connection space between the conveying pipeline 11 and the box. This will not be elaborated here.

[0059] Therefore, the above structure can further improve the absorption efficiency of the bending part 123 in terms of the manufacturing tolerance between the housing and the conveying pipeline 11, and make the connection between the conveying pipeline 11 and the housing more flexible while improving the connection stability and sealing between the conveying pipeline 11 and the housing.

[0060] In some embodiments, the flexible connector 12 is arranged around the outer periphery of the delivery pipeline 11, and the inner diameter of the flexible connector 12 decreases from the first connecting end 121 to the second connecting end 122.

[0061] Specifically, the flexible connector 12 is arranged around the circumference of the conveying pipeline 11, thereby better absorbing the manufacturing tolerances between the conveying pipeline 11 and the housing.

[0062] Furthermore, the inner diameter of the flexible connector 12 is set to decrease from the first connecting end 121 to the second connecting end 122. That is, the flexible connector 12 is set to a flared shape with one end larger than the other, thus providing the function of free movement of the conveying pipeline 11 relative to the housing.

[0063] With the above structure, the flexible connector 12 can absorb the axial and radial deviations between the conveying pipeline 11 and the box, further improving the connection stability and sealing between the conveying pipeline 11 and the box.

[0064] In some embodiments, the tensile strength of the flexible connector 12 ranges from 3 MPa to 50 MPa.

[0065] Specifically, the tensile strength of the flexible connector 12 will affect the connection stability and sealing between the conveying pipeline 11 and the housing. Thus, by setting the tensile strength of the flexible connector 12 within the aforementioned range, the conveying pipeline 11 and the housing can be effectively connected, and the conveying pipeline 11 can move stably relative to the housing.

[0066] In some embodiments, the flexible connector 12 is configured as a soft rubber component.

[0067] Specifically, the flexible components can be, but are not limited to, made of plastic. In this way, the flexible connector 12 can not only seal the connection between the conveying pipeline 11 and the housing, but also enable the conveying pipeline 11 to move relative to the housing, effectively absorbing the manufacturing tolerances between the conveying pipeline 11 and the housing.

[0068] In some embodiments, the flexible connector 12 is made of any one of thermoplastic polyurethane elastomer, thermoplastic polyester elastomer, thermoplastic polyolefin elastomer, styrene block copolymer, thermoplastic vulcanized rubber, EPDM rubber, natural rubber, and chloroprene rubber.

[0069] Specifically, the flexible connector 12 can be made of thermoplastic polyurethane elastomer (TPU), thermoplastic polyester elastomer (TPEE), thermoplastic polyolefin elastomer (TPO), styrene block copolymer (SEBS), thermoplastic vulcanizate (TPV), ethylene propylene diene monomer (EPDM), natural rubber (NR), chloroprene rubber (CR), etc.

[0070] The tensile strength ranges for thermoplastic polyurethane elastomers from 15 MPa to 50 MPa, thermoplastic polyester elastomers from 20 MPa to 45 MPa, thermoplastic polyolefin elastomers from 5 MPa to 15 MPa, styrene block copolymers from 3 MPa to 10 MPa, thermoplastic vulcanized rubber from 8 MPa to 25 MPa, ethylene propylene diene monomer (EPDM) rubber from 8 MPa to 18 MPa, natural rubber from 15 MPa to 25 MPa, and chloroprene rubber from 12 MPa to 18 MPa.

[0071] Thus, the flexible connector 12 can not only achieve a sealed connection between the conveying pipeline 11 and the box, but also effectively absorb the manufacturing tolerances between the conveying pipeline 11 and the box, achieving a stable and flexible connection between the conveying pipeline 11 and the box.

[0072] In some embodiments, the energy storage device 10 further includes a connector 13, which is detachably connected to the tank wall, and a first connection end 121 is connected to the connector 13.

[0073] Specifically, the connector 13 can be, but is not limited to, a sheet metal part. The sheet metal part is first detachably connected to the box wall of the box body by bolts or other structures. Then, the first connecting end 121 of the flexible connector 12 is connected to the sheet metal part, and the second connecting end 122 is connected to the conveying pipeline 11, thereby realizing the connection between the conveying pipeline 11 and the box body.

[0074] The above structure enables a smooth connection between the conveying pipeline 11 and the housing, and ensures that the flexible connector 12 is stably and sealed between the conveying pipeline 11 and the housing.

[0075] In some embodiments, a first limiting groove 124 is formed on the end face of the first connecting end 121, and a first latch 131 is formed on the end of the connector 13, the first latch 131 engaging with the first limiting groove 124. And / or, a second limiting groove 125 is formed on the end face of the second connecting end 122, and a second latch 111 protrudes from the outer peripheral surface of the conveying pipeline 11, the second latch 111 engaging with the second limiting groove 125.

[0076] Specifically, the first connecting end 121 and the connecting piece 13 can be engaged with the first buckle 131 and the first limiting groove 124, and the second connecting end 122 and the conveying pipeline 11 can be engaged with the second buckle 111 and the second limiting groove 125.

[0077] Since the flexible connector 12 is elastic, the first buckle 131 and the first limiting groove 124 are interference fit, and the second buckle 111 and the second limiting groove 125 are also interference fit. In this way, the flexible connector 12 can be sealed to the conveying pipeline 11 and the box respectively.

[0078] Thus, through the above structure, a quick and stable sealed connection can be achieved between the flexible connector 12 and the conveying pipeline 11 and the housing, respectively.

[0079] like Figure 5 As shown, in some embodiments, the energy storage device 10 further includes a fastener 14, through which the first connecting end 121 is connected to the connector 13. And / or, the second connecting end 122 is connected to the delivery pipeline 11 through the fastener 14.

[0080] Specifically, the fastener 14 may be, but is not limited to, bolts. The connector 13, the flexible connector 12, and the conveying pipeline 11 may each be provided with flanges, and then the fastener 14 is used to fix and seal the flanges, thereby achieving a sealed connection of the flexible connector 12 between the connector 13 and the conveying pipeline 11.

[0081] With the above structure, the flexible connector 12 can be more easily and quickly sealed between the housing and the conveying pipeline 11.

[0082] In some embodiments, the conveying pipeline 11 includes a pipeline body 112 and an insulation layer 113. The pipeline body 112 forms a conveying channel 114 for conveying heat exchange medium inside, and the insulation layer 113 wraps around the outer periphery of the pipeline body 112.

[0083] Specifically, the interior of the pipeline body 112 is hollow to form a transport channel 114 for transporting the heat exchange medium.

[0084] Furthermore, the insulation layer 113 is wrapped around the outer periphery of the pipeline body 112. In this way, the insulation layer 113 can effectively reduce the heat exchange between the environment and the coolant in the transport channel 114, thereby reducing condensation.

[0085] Therefore, the above structure can reduce the heat exchange between the heat exchange medium inside the conveying channel 114 and the external environment, reduce the impact of the external environment on the heat exchange medium, and improve the heat exchange efficiency.

[0086] Based on the same concept as the energy storage device 10 described above, this application also provides an energy storage system, including the energy storage device 10 as described above.

[0087] Based on the same concept as the energy storage device 10 described above, this application also provides a charging network including the energy storage device 10 as described above.

[0088] According to one or more embodiments, in specific use, a through hole is first made in the wall of the housing. The connector 13 is fixed to the housing wall with screws and surrounds the outside of the through hole. Then, the delivery pipe 11 is passed through the through hole, so that one end of the delivery pipe 11 extends into the interior of the housing and is connected to a designated position of the battery device. The other end of the delivery pipe 11 is connected to an external rigid pipe to form a closed coolant circuit to deliver coolant to the battery device.

[0089] The first connecting end 121 of the flexible connector 12 is connected to the connector 13, and the second connecting end 122 is connected to the conveying pipeline 11. At this time, the flexible connector 12 can absorb the axial and radial deviations of the conveying pipeline 11, eliminate the manufacturing tolerances in the installation process, and enable the conveying pipeline 11 to move relative to the box, thereby improving the connection stability and sealing performance between the conveying pipeline 11 and the box.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An energy storage device, characterized by, include: Box; The delivery pipeline passes through the box body; and A flexible connector has a first connecting end connected to the housing and a second connecting end connected to the conveying pipeline, with a bend between the first connecting end and the second connecting end; the flexible connector is wrapped around the outer periphery of the conveying pipeline, and the inner diameter of the flexible connector decreases from the first connecting end to the second connecting end; The curved portion is configured to provide movement space for the relative movement between the delivery pipeline and the housing.

2. The energy storage device of claim 1, wherein, The bending section includes multiple sections, and each bending section is connected and arranged sequentially along the axial direction of the conveying pipeline.

3. The energy storage device of claim 1, wherein, The tensile strength of the flexible connector ranges from 3 MPa to 50 MPa.

4. The energy storage device of claim 3, wherein, The flexible connector is constructed as a soft rubber component.

5. The energy storage device of claim 4, wherein, The flexible connector is made of any one of the following materials: thermoplastic polyurethane elastomer, thermoplastic polyester elastomer, thermoplastic polyolefin elastomer, styrene block copolymer, thermoplastic vulcanized rubber, EPDM rubber, natural rubber, and chloroprene rubber.

6. The energy storage device of any one of claims 1-5, wherein, The energy storage device also includes a connector, which is detachably connected to the housing, and the first connection end is connected to the connector.

7. The energy storage device of claim 6, wherein, A first limiting groove is formed on the end face of the first connecting end, and a first buckle is formed at the end of the connecting member, the first buckle engaging with the first limiting groove; and / or, a second limiting groove is formed on the end face of the second connecting end, and a second buckle is formed by protruding from the outer circumferential surface of the conveying pipeline, the second buckle engaging with the second limiting groove.

8. The energy storage device of claim 6, wherein, The energy storage device further includes fasteners, and the first connecting end is connected to the connecting member by the fasteners; and / or, the second connecting end is connected to the delivery pipeline by the fasteners.

9. The energy storage device of any one of claims 1-5, wherein, The conveying pipeline includes a pipeline body and an insulation layer. The interior of the pipeline body forms a conveying channel for conveying the heat exchange medium, and the insulation layer wraps around the outer periphery of the pipeline body.

10. An energy storage system characterized by, Includes the energy storage device as described in any one of claims 1-9.

11. A charging network characterized in that, Includes the energy storage device as described in any one of claims 1-9.

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