Energy storage cabinet and energy storage system

Abstract

This application provides an energy storage cabinet and energy storage system, belonging to the technical field of energy storage equipment. The energy storage cabinet includes a battery compartment and a heat dissipation shell. The battery compartment contains multiple stacked battery cells. The heat dissipation shell is detachably connected to the battery compartment and has a receiving cavity with an opening facing the battery compartment. The heat dissipation shell also has a docking member outside for connecting to external devices. The receiving cavity contains at least one power component and at least one connector. The power component is configured to connect to the battery cells via the connector and to the external device via the docking member, thereby electrically connecting the battery cells and the external device. The energy storage cabinet provided in this application integrates the power component and the connector within the heat dissipation shell, forming a modular assembly that facilitates the disassembly, assembly, and maintenance of the power component.

Description

Technical Field

[0001] This application relates to energy storage equipment technology, and more particularly to an energy storage cabinet and energy storage system. Background Technology

[0002] The residential energy storage system is assembled by stacking multiple battery packs and inverters. The battery pack is an independent functional unit with a battery compartment and a battery optimizer inside.

[0003] In related technologies, the battery compartment integrates battery cells and related connecting harnesses that connect to the battery cells, and the battery cells are electrically connected to the battery optimizer through the connecting harnesses.

[0004] The battery optimizer includes consumable components such as cooling fans, requiring regular maintenance. Because the connecting harness is integrated into the battery compartment, disassembling and assembling the battery optimizer requires disconnecting the cells and the connecting harness within a limited operating space, making disassembly difficult and hindering maintenance efficiency. Summary of the Invention

[0005] This application provides an energy storage cabinet and an energy storage system to solve the technical problem of inconvenient disassembly and assembly of battery optimizers in related technologies.

[0006] On one hand, embodiments of this application provide an energy storage cabinet, including:

[0007] A battery compartment containing multiple stacked battery cells;

[0008] A heat dissipation housing is detachably connected to the battery compartment. The heat dissipation housing has a receiving cavity with an opening facing the battery compartment, and the heat dissipation housing has a docking part for connecting to external devices.

[0009] The cavity contains at least one power component and at least one connector. The power component is configured to connect to the battery cell via the connector and to the external device via the docking member, thereby electrically connecting the battery cell and the external device.

[0010] In some possible implementations, it also includes:

[0011] A support member is disposed in the receiving cavity and is detachably connected to the heat dissipation housing. The power component is disposed on the side of the support member opposite to the opening.

[0012] A control component is provided on the side of the support member away from the power component. The control component is connected to the power component. There are heat dissipation gaps between the support member and the control component, and between the power component and the support member.

[0013] In some possible implementations, the support member is provided with a plurality of support columns spaced apart, the control component is supported on the support columns, and the control component and the support columns are connected by bolts that pass through both.

[0014] In some possible implementations, the heat sink housing has a first mounting portion and a second mounting portion internally configured. The power component is connected to the first mounting portion by a first fastener that passes through both of them, and the support member is connected to the second mounting portion by a second fastener that passes through both of them.

[0015] The first mounting part and the second mounting part are arranged with their orthogonal projections on the heat dissipation housing offset.

[0016] In some possible implementations, the heat dissipation housing has heat dissipation fins on the outer wall facing away from the opening, and the inner wall of the receiving cavity has a heat-conducting portion protruding toward the opening, with at least a portion of the power component abutting against the heat-conducting portion.

[0017] In some possible implementations, the connector is a busbar or a flexible circuit board.

[0018] In some possible implementations, the battery compartment includes:

[0019] Supporting framework;

[0020] Multiple side panels are connected to the support frame to enclose and form a compartment for accommodating the battery cells;

[0021] At least one clamping plate is elastically connected to the side panel. The clamping plate is clamped between the battery cell and the side panel, and the clamping plate engages with the battery cell to fix the battery cell in the housing.

[0022] In some possible implementations, the elastic force between the clamping plate and the side panel is adjustable; the clamping plate is provided with a plurality of pressure detection elements at intervals, the pressure detection elements being used to detect the pressure value between the clamping plate and the battery cell.

[0023] In some possible implementations, an elastic medium layer is provided between the side panel and the clamping plate, the elastic medium layer being a rubber layer, a foam layer, or a spring sheet layer;

[0024] Alternatively, multiple springs may be provided between the side panel and the clamping plate.

[0025] On the other hand, embodiments of this application also provide an energy storage system, including an energy storage cabinet as described in any of the preceding claims.

[0026] The energy storage cabinet provided in this application embodiment integrates power components and connectors into the receiving cavity of the heat dissipation shell, forming a modular assembly. Since the heat dissipation shell and the battery compartment are detachably connected, when it is necessary to replace or maintain the power components, the entire heat dissipation shell can be removed from the battery compartment, and the power components and connectors can be removed from the battery compartment along with the heat dissipation shell. This avoids disconnecting the connectors and the battery cells in a confined space, which helps to reduce the difficulty of maintenance operations and improve maintenance efficiency.

[0027] In addition, the heat dissipation housing serves both as a component integration and heat dissipation unit. The housing cavity provides installation space for power components and connectors, and it also dissipates heat from the power components to the outside. Power components do not require separate mounting brackets and cooling fans, which helps reduce the number of parts and makes the energy storage cabinet more compact. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] Figure 1 This is a schematic diagram of the structure of the energy storage cabinet provided in the embodiments of this application;

[0030] Figure 2 This is a schematic diagram showing the connection between the heat sink and the power component provided in an embodiment of this application;

[0031] Figure 3 for Figure 2 A schematic diagram of the provided heat sink housing from another perspective;

[0032] Figure 4 A schematic diagram of the connection structure of the power component, support component and control component provided in the embodiments of this application;

[0033] Figure 5 This is a schematic diagram of the connection structure between the side panel and the clamping plate provided in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the connection structure of the side panel and the clamping plate provided in another embodiment of this application.

[0035] Explanation of reference numerals in the attached figures

[0036] 100-Battery compartment; 110-Battery cell; 120-Support frame; 130-Side panel; 140-Clamping plate; 150-Elastic dielectric layer; 160-Spring component; 170-Pressure detection component;

[0037] 200 - Heat dissipation housing;

[0038] 210 - Receiving cavity; 220 - Connecting part; 230 - Power component; 240 - Connecting part; 250 - Supporting part; 251 - Supporting column; 260 - Control component; 270 - First mounting part; 280 - Second mounting part; 290 - Heat dissipation fins; 291 - Heat conducting part.

[0039] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0042] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0043] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0044] Unless otherwise stated, the term "multiple" means two or more.

[0045] As mentioned in the background art, in related technologies, the battery compartment integrates battery cells and related connecting harnesses connected to the battery cells, and the battery cells are electrically connected to the battery optimizer through the connecting harnesses.

[0046] The battery optimizer includes consumable components such as cooling fans, requiring regular maintenance. Because the connecting harness is integrated into the battery compartment, disassembling and assembling the battery optimizer requires disconnecting the cells and the connecting harness within a limited operating space, making disassembly difficult and hindering maintenance efficiency.

[0047] Based on the above description, one or more embodiments of this application provide an energy storage cabinet and an energy storage system. In the energy storage cabinet, power components and connectors are integrated in the receiving cavity of the heat dissipation shell to form a modular component. Since the heat dissipation shell and the battery compartment are detachably connected, when it is necessary to replace or maintain the power components, the entire heat dissipation shell can be removed from the battery compartment. The power components and connectors can be removed from the battery compartment along with the heat dissipation shell. This avoids disconnecting the connectors and the battery cells in a confined space, which helps to reduce the difficulty of maintenance operations and improve maintenance efficiency.

[0048] The following description, in conjunction with the accompanying drawings, illustrates the solutions of the embodiments of this application.

[0049] like Figure 1 and Figure 2 As shown in the figure, this application embodiment provides an energy storage cabinet, including a battery compartment 100 and a heat dissipation shell 200.

[0050] The battery compartment 100 contains multiple stacked battery cells 110; a heat dissipation housing 200 is detachably connected to the battery compartment 100, the heat dissipation housing 200 has a receiving cavity 210 with an opening facing the battery compartment 100, and a docking member 220 for connecting to an external device is provided outside the heat dissipation housing 200; wherein, at least one power component 230 and at least one connector 240 are provided in the receiving cavity 210, the power component 230 is configured to be connected to the battery cell 110 through the connector 240 and connected to an external device through the docking member 220, so as to electrically connect the battery cell 110 and the external device.

[0051] As can be seen from the above description, the energy storage cabinet provided in this application embodiment utilizes the receiving cavity 210 formed by the heat dissipation shell 200 to integrate the power component 230 and the connector 240 of the battery optimizer in the related technology into the receiving cavity 210. When it is necessary to disassemble and maintain the power component 230, it is only necessary to remove the heat dissipation shell 200 as a whole from the battery compartment 100. There is no need to disconnect the electrical connection between the connector 240 and the cell 110 in a small space, which helps to reduce the difficulty of maintenance operations.

[0052] The docking component 220 in this embodiment can be a conductive bar, terminal block, plug-in connector, or spring contact. The docking component 220 is adapted to the docking interface corresponding to the external device, and the docking method can be pin-and-hole mating or spring contact mating. During disassembly and maintenance, the heat sink 200, together with the docking component 220, power component 230 and connector 240 thereon, can be disassembled as a whole, further simplifying the maintenance process.

[0053] like Figure 2 As shown, in some embodiments, the energy storage cabinet also includes a support 250 and a control component 260.

[0054] The support member 250 is disposed in the receiving cavity 210 and is detachably connected to the heat dissipation shell 200. The power component 230 is disposed on the side of the support member 250 away from the opening. The control component 260 is disposed on the side of the support member 250 away from the power component 230. The control component 260 is connected to the power component 230. There are heat dissipation gaps between the support member 250 and the control component 260, and between the power component 230 and the support member 250.

[0055] In the above embodiment, the heat dissipation housing 200 has a receiving cavity 210 with an opening facing the battery compartment 100. The heat dissipation housing 200 is fastened to the top of the battery compartment 100 and connected by fasteners that pass through both. Along the bottom of the receiving cavity 210 towards the opening, a power component 230, a support member 250, and a control member 260 are arranged sequentially. The support member 250 is located on the side of the power component 230 facing the opening and is detachably connected to the heat dissipation housing 200. A heat dissipation gap exists between the support member 250 and the power component 230. This gap separates the heat conduction paths of the power component 230 and the support member 250, preventing the heat generated by the power component 230 from being directly conducted to the control member 260 through the support member 250. The support member 250 itself also serves as a heat radiation shield. Furthermore, the heat dissipation gap between the power component 230 and the support member 250 provides a channel for airflow within the receiving cavity 210, facilitating the removal of some heat from the surface of the power component 230.

[0056] like Figure 4 As shown, the control component 260 is located on the side of the support member 250 away from the power component 230, that is, at the closest point to the opening of the receiving cavity 210. A heat dissipation gap is also provided between the control component 260 and the support member 250. This heat dissipation gap maintains a distance between the control component 260 and the support member 250, preventing radiant heat or residual heat from the support member 250 from being directly conducted to the control component 260. This further reduces the operating temperature of the control component 260, which helps extend its service life and ensures operational stability.

[0057] In energy storage systems based on related technologies, the battery optimizer includes a power conversion circuit and a control management circuit. The power conversion circuit is responsible for the charging and discharging management and energy conversion of the battery, and includes power components such as converters, power switching devices, inductors, and transformers. It is the main functional execution part and heat source in the battery optimizer. The control management circuit is responsible for monitoring and controlling the power conversion circuit, and includes control chips, communication modules, battery management units, etc. Its power consumption and heat generation are relatively low.

[0058] In this embodiment, the power component 230 is the power conversion circuit of the battery optimizer in the related art, and the control component 260 is the control management circuit of the battery optimizer. The control component 260 and the power component 230 are electrically connected through a wiring harness or flexible circuit board to transmit control signals and monitoring data. In this embodiment, the power component 230 and the control component 260 are arranged in layers within the receiving cavity 210 of the heat dissipation housing 200, instead of the traditional co-plane or co-surface arrangement. The two are separated by a support member 250. This design can achieve thermal isolation between the power component 230 and the control component 260 while retaining the function of the battery optimizer, and also solves the thermal coupling problem caused by the co-plane or co-surface arrangement in the prior art.

[0059] For example, a plurality of support columns 251 are spaced apart on the support member 250, and the control component 260 is supported on the support columns 251. The control component 260 and the support columns 251 are connected by bolts that pass through both of them.

[0060] In the above embodiment, the support column 251 extends from the side surface of the support member 250 toward the control member 260 toward the opening of the receiving cavity 210. The support column 251 can be integrally formed with the support member 250, for example, by stretching a columnar protrusion on a metal sheet through a stamping process, or the support column 251 is an independent part, which is fixed to the support member 250 by welding, riveting or threaded connection.

[0061] The control component 260 is supported on the support column 251. The support column 251 forms a heat dissipation gap between the control component 260 and the support component 250. Therefore, the height of the support column 251 also corresponds to the size of the heat dissipation gap. The height of the support column 251 can be adjusted according to the heat dissipation requirements and the size of the control component 260.

[0062] Specifically, the control component 260 has mounting holes corresponding to the support column 251, and the support column 251 has threaded holes. Bolts are screwed into the threaded holes of the support column 251 through the mounting holes on the control component 260, thereby fixing the control component 260 to the support column 251.

[0063] The control component 260 is supported by support columns 251 and fastened with bolts, resulting in high connection rigidity. This prevents loosening or displacement under transportation vibration or operational impact conditions, thus ensuring the reliability of the electrical connection. Furthermore, the multiple support columns 251 are spaced apart on the support member 250, distributing the fixing force of the control component 260 across multiple support points. This helps avoid stress concentration that could cause the control component 260's circuit board to bend or solder joints to crack, thereby improving the structural reliability of the control component 260.

[0064] In some embodiments, such as Figure 3 and Figure 4 As shown, the heat sink housing 200 has a first mounting part 270 and a second mounting part 280 inside. The power component 230 is connected to the first mounting part 270 by a first fastener that passes through both of them. The support member 250 is connected to the second mounting part 280 by a second fastener that passes through both of them. The first mounting part 270 and the second mounting part 280 are arranged with their orthographic projections on the heat sink housing 200 offset.

[0065] For example, the first mounting part 270 and the second mounting part 280 are integrally formed bosses, protrusions, ribs or recesses on the inner wall of the heat sink housing 200, or the first mounting part 270 and the second mounting part 280 are mounting blocks that are independently formed and fixed to the inner wall of the heat sink housing 200.

[0066] A threaded hole is provided on the first mounting part 270, and a corresponding mounting hole is provided on the power component 230. A first fastener passes through the mounting hole of the power component 230 and is screwed into the threaded hole of the first mounting part 270, fixing the power component 230 to the first mounting part 270. After the power component 230 is fixed, its heat dissipation surface is in close contact with the bottom wall of the heat dissipation housing 200, directly conducting heat. Similarly, a threaded hole is provided on the second mounting part 280, and a corresponding mounting hole is provided on the support member 250. A second fastener passes through the mounting hole of the support member 250 and is screwed into the threaded hole of the second mounting part 280, fixing the support member 250 to the second mounting part 280. After the support member 250 is fixed, the receiving cavity 210 is divided into an inner region and an outer region, with the power component 230 located in the inner region and the control component 260 located in the outer region.

[0067] Here, the first and second fasteners can be screws, bolts, or studs. The number of the first mounting part 270 and the second mounting part 280 can be adjusted according to actual installation requirements, as long as they correspond to the mounting points of the power component 230 and the support member 250.

[0068] It should be noted that the first mounting part 270 and the second mounting part 280 are arranged in a staggered manner on the heat dissipation housing 200, that is, when viewed along the direction perpendicular to the opening plane of the receiving cavity 210, the projection areas of the first mounting part 270 and the second mounting part 280 do not overlap.

[0069] During assembly or disassembly, the operating tools can independently approach the first and second fasteners, avoiding interference and obstruction between them in the assembly direction. During maintenance, the support 250 or power component 230 can also be disassembled independently without having to remove another component first in order to approach a certain fastener. The assembly process is smooth and efficient.

[0070] Furthermore, since the first mounting part 270 and the second mounting part 280 are misaligned, the first fastener and the second fastener corresponding to the power component 230 and the support member 250 can be operated independently. When the control component 260 needs to be inspected, the support member 250 and the control component 260 on it can be removed separately without touching the power component 230. Layered independent disassembly and assembly helps to improve the convenience of maintenance operations and reduce maintenance time.

[0071] like Figure 2 and Figure 3 As shown, in some embodiments, the heat dissipation housing 200 has heat dissipation fins 290 on the outer wall of the side opposite to the opening, and the receiving cavity 210 has a heat-conducting part 291 protruding toward the opening on the inner wall, and at least a portion of the power component 230 abuts against the heat-conducting part 291.

[0072] In the above embodiments, the heat dissipation fins 290 are integrally formed with the bottom outer wall of the heat dissipation housing 200, for example, by die casting, extrusion or machining. The heat dissipation fins 290 are arranged in multiple parallel pieces, and airflow channels are formed between adjacent heat dissipation fins 290 to increase the contact area between the heat dissipation housing 200 and the external air, thereby improving the heat dissipation efficiency under natural convection or forced air cooling conditions.

[0073] Here, the heat-conducting part 291 is integrally formed with the heat dissipation housing 200. For example, a boss, rib, or pillar structure is formed on the inner side of the bottom wall of the heat dissipation housing 200. The heat-conducting part 291 transfers the heat inside the receiving cavity 210 to the heat dissipation housing 200, and then conducts it to the heat dissipation fins 290 for dissipation. The power component 230 is provided with a slot for fitting the heat-conducting part 291. The shape and size of the slot are adapted to the protruding part of the heat-conducting part 291. The heat-conducting part 291 is embedded in the slot of the power component 230, and the two form a surface contact. The heat generated by the power component 230 is directly introduced into the heat dissipation housing 200 through the heat-conducting part 291. The slot and the heat-conducting part 291 fit together and can also play a role in pre-assembly positioning.

[0074] By setting the slot and the heat-conducting part 291 to fit together, the heat is directly conducted to the heat dissipation shell 200 through the heat-conducting part 291, and then dissipated through the heat dissipation fins 290. The thermal resistance is small and the heat dissipation effect is higher.

[0075] As an alternative implementation, the connector 240 can be a busbar or a flexible circuit board, with one end connected to the battery cell 110 and the other end connected to the power component 230. Exemplarily, when the connector 240 is a busbar, the power component 230, the connector 240, the battery cell 110, and the connector 240 are all electrically connected by bolts. For example, the battery cell 110 may have a terminal post, and one end of the connector 240 may have a connection hole matching the terminal post, and be fixedly connected to the terminal post by a fastening bolt.

[0076] When disassembling the heat sink housing 200, the connection between the connector 240 and the battery cell 110 can be disconnected from the side panel 130 of the battery compartment 100 first. After disconnecting the wiring harness of each component, the connector 240 can be removed together with the heat sink housing 200, avoiding working in the narrow space of the battery compartment 100 and making disassembly easier.

[0077] like Figure 1 , Figure 5 and Figure 6 As shown in the embodiment of this application, the battery compartment 100 includes a support frame 120, a plurality of side panels 130 and at least one clamping plate 140.

[0078] Multiple side panels 130 are connected to the support frame 120 to enclose and form a compartment for accommodating the battery cell 110; a clamping plate 140 is elastically connected to the side panels 130, and the clamping plate 140 is clamped between the battery cell 110 and the side panels 130. The clamping plate 140 and the battery cell 110 are engaged to fix the battery cell 110 in the compartment.

[0079] In the above embodiments, the support frame 120 is the skeleton structure of the battery compartment 100. It can be formed by welding or bolting metal profiles, or by bending sheet metal parts. The support frame 120 provides the overall structural strength and rigidity of the battery compartment 100, bears the weight of the battery cell 110 and external loads, and serves as the mounting base for the side panel 130.

[0080] The side panels 130 are made of metal sheets such as steel plates and aluminum alloy plates, and are fixed to the support frame 120 by means of screws, riveting, or welding. Multiple side panels 130 together form a semi-enclosed compartment. The clamping plate 140 is elastically connected to the side panels 130, that is, the clamping plate 140 is not directly and rigidly fixed to the side wall of the side panel 130, but is connected to the side panel 130 through an elastic structure or elastic element. When the clamping plate 140 is subjected to the expansion force of the battery cell 110, it can produce a small displacement relative to the side panel 130. The elastic structure or elastic element applies an elastic restoring force to the clamping plate 140, and this restoring force is transmitted in the opposite direction to the battery cell 110, keeping the battery cell 110 clamped and preventing the battery cell 110 from accidentally shifting.

[0081] In this embodiment, the clamping plate 140 has a snap-fit ​​structure adapted to the shape of the battery cell 110 on its side facing the battery cell 110, such as a groove, rib, claw, or contoured surface. The corresponding part of the outer shell of the battery cell 110 fits into the snap-fit ​​structure, restricting the displacement of the battery cell 110 within the compartment. Through the snap-fit ​​engagement between the clamping plate 140 and the battery cell 110, and the clamping force provided by the elastic connection between the clamping plate 140 and the side panel 130, the battery cell 110 can be stably fixed within the compartment without the need for external steel straps or baffles. This simplifies the assembly structure of the battery cell 110, reduces the overall volume occupied by the battery pack, and eliminates the need for steel strap binding, thus improving the assembly efficiency of the battery pack.

[0082] In the above embodiments, the number of clamping plates 140 can be one or more. When multiple clamping plates 140 are provided, each side panel 130 facing the battery cell 110 is elastically connected to a clamping plate 140. Alternatively, among the two side panels 130 on opposite sides, a clamping plate 140 is provided on one side, and the battery cell 110 on the other side directly abuts against the inner wall of the compartment. As long as the clamping plate 140 has an elastic force to press against the battery cell 110, it is sufficient.

[0083] By setting a clamping plate 140 on the side of the side panel 130, the clamping plate 140 and the side panel 130 are elastically connected. When the battery cell 110 expands slightly due to cyclic aging, the elastically connected clamping plate 140 can absorb the deformation and prevent the expansion force from being directly transmitted to the side panel 130, causing the compartment to deform. In addition, the continuous clamping force provided by the elastic connection ensures that the clamping plate 140 and the battery cell 110 always maintain a snap-fit ​​fit. During long-term operation, the battery cell 110 will not loosen, which is beneficial to improving the overall service life of the energy storage cabinet.

[0084] Furthermore, the elastic force between the clamping plate 140 and the side panel 130 is adjustable; multiple pressure detection elements 170 are spaced apart on the clamping plate 140, which are used to detect the pressure values ​​between the clamping plate 140 and the battery cell 110. The pressure detection elements 170 can be piezoresistive pressure sensors, piezoelectric pressure sensors, capacitive pressure sensors, or thin-film pressure sensors as described in related technologies. The pressure detection elements 170 are electrically connected to the battery management system via signal lines to transmit pressure data in real time.

[0085] Here, as Figure 5 As shown, an elastic medium layer 150 is provided between the side panel 130 and the clamping plate 140. The elastic medium layer 150 can be a rubber layer, a foam layer, or a spring sheet layer; alternatively, multiple spring elements 160 can be provided between the side panel 130 and the clamping plate 140. The rubber layer can be a gasket or plate made of natural rubber, silicone rubber, EPDM rubber, etc.; the foam layer can be made of foamed silicone, foamed polyurethane, or foamed EVA material, which has low density and high compressibility, and can provide a large compression stroke under a small preload, making it suitable for absorbing the small expansion deformation of the battery cell 110; the spring sheet layer can be a wave spring sheet or a stack of butterfly spring sheets. The elastic medium layer 150 can be a single plate covering the entire back of the clamping plate 140, or it can be an elastic medium layer 150 with multiple separate pads, each corresponding to the position of the pressure detection element 170, to provide local elastic force.

[0086] When using the elastic medium layer 150, adjusting bolts can be inserted through the side panel 130. The adjusting bolts are connected to the clamping plate 140, and the elastic medium layer 150 is clamped between the side panel 130 and the clamping plate 140. When the adjusting bolts are tightened, the elastic medium layer 150 is further compressed, and the preload increases. When the adjusting bolts are loosened, the preload decreases. There can be multiple adjusting bolts, corresponding to the segmented arrangement of the elastic medium layer 150, to achieve independent adjustment of the elastic force in different areas.

[0087] like Figure 6 As shown, when a spring element 160 is installed between the side panel 130 and the clamping plate 140, the spring element 160 can be fitted onto a guide post or guide sleeve. The guide post is fixed to the clamping plate 140 or the side panel 130 to ensure that the spring element 160 does not tilt during compression. The total elastic force can be adjusted by replacing the spring element 160 with one of different wire diameters or free heights, or by increasing or decreasing the number of spring elements 160. Alternatively, adjusting bolts can be installed on the side panel 130 and the clamping plate 140, and the pre-compression of the spring element 160 can be adjusted by rotating the adjusting bolts to achieve adjustment of the elastic effect.

[0088] During assembly, operators can tighten the adjusting bolts using a torque-controlled tool, and the pressure value applied to the battery cell 110 by the clamping plate 140 is monitored in real time by the pressure detection device 170. Adjustment stops when the pressure value reported by the pressure detection device 170 reaches the preset target range. Historical pressure data during assembly can be recorded in the battery management system for subsequent maintenance.

[0089] It should be noted that the preset target range corresponding to the pressure detection component 170 also needs to be adjusted for different types and specifications of battery cells 110. For example, referring to the cycle life test data of battery cells 110 provided by the battery cell manufacturer, the expansion force curve of battery cells 110 under different cycle numbers and different initial preloads is obtained. The initial preload corresponding to the force that will not cause the expansion force of battery cells 110 to exceed its safety tolerance threshold within the preset cycle life is selected as the upper limit reference value. Combining the friction between battery cells 110 and clamping plate 140, the overall mass of battery cells 110 and the operating conditions of battery compartment 100, the minimum positive pressure required to ensure that battery cells 110 will not slip is the lower limit reference value of the preset target range.

[0090] By setting up a pressure detection component 170, the long-term monitoring data of the pressure detection component 170 can be analyzed in conjunction with the electrical parameters of the battery cell 110 to identify abnormal expansion trends of the battery cell 110 and issue remote early warnings in advance. This helps reduce the risk of safety accidents and improves the intelligent operation and maintenance level of the energy storage system. In addition, the elastic dielectric layer 150 or the spring component 160 can absorb the deformation of the battery cell 110 during cyclic aging and expansion, converting the displacement caused by expansion into elastic potential energy, rather than directly transmitting rigid stress to the side panel 130 and the support frame 120. This effectively avoids structural failures such as deformation of the battery compartment 100 and cracking of welds due to long-term operation, and improves the overall service life of the battery compartment 100.

[0091] Another embodiment of this application also provides an energy storage system, including the energy storage cabinet as in any of the above embodiments, wherein adjacent energy storage cabinets are electrically connected by a docking member 220.

[0092] Since the energy storage system includes the energy storage cabinet as described in any of the above embodiments, it has all the advantages of an energy storage cabinet.

[0093] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An energy storage cabinet, characterized in that, include: A battery compartment (100) is provided with multiple stacked battery cells (110). A heat dissipation housing (200) is detachably connected to the battery compartment (100). The heat dissipation housing (200) has a receiving cavity (210) with an opening facing the battery compartment (100). The heat dissipation housing (200) is provided with a docking part (220) for connecting to external devices. The cavity (210) is provided with at least one power component (230) and at least one connector (240). The power component (230) is configured to be connected to the battery cell (110) via the connector (240) and to the external device via the docking part (220) to electrically connect the battery cell (110) and the external device.

2. The energy storage cabinet according to claim 1, characterized in that, Also includes: A support member (250) is disposed in the receiving cavity (210) and is detachably connected to the heat dissipation housing (200). The power component (230) is disposed on the side of the support member (250) away from the opening. A control component (260) is disposed on the side of the support member (250) away from the power component (230). The control component (260) is connected to the power component (230). There are heat dissipation gaps between the support member (250) and the control component (260), and between the power component (230) and the support member (250).

3. The energy storage cabinet according to claim 2, characterized in that, The support member (250) is provided with a plurality of support columns (251) spaced apart. The control component (260) is supported on the support columns (251). The control component (260) and the support columns (251) are connected by bolts that pass through both of them.

4. The energy storage cabinet according to claim 2, characterized in that, The heat sink housing (200) has a first mounting part (270) and a second mounting part (280) inside. The power component (230) is connected to the first mounting part (270) by a first fastener that passes through both of them. The support member (250) is connected to the second mounting part (280) by a second fastener that passes through both of them. The first mounting part (270) and the second mounting part (280) are arranged with their orthogonal projections offset on the heat dissipation housing (200).

5. The energy storage cabinet according to claim 1, characterized in that, The heat dissipation housing (200) has heat dissipation fins (290) on the outer wall of the side opposite to the opening, and a heat-conducting part (291) protruding toward the opening is formed on the inner wall of the receiving cavity (210), and at least a portion of the power component (230) abuts against the heat-conducting part (291).

6. The energy storage cabinet according to claim 1, characterized in that, The connector (240) is a busbar or a flexible circuit board.

7. The energy storage cabinet according to any one of claims 1 to 6, characterized in that, The battery compartment (100) includes: Support frame (120); Multiple side panels (130) are connected to the support frame (120) to enclose and form a compartment for accommodating the battery cell (110); At least one clamping plate (140) is elastically connected to the side panel (130). The clamping plate (140) is clamped between the battery cell (110) and the side panel (130). The clamping plate (140) engages with the battery cell (110) to fix the battery cell (110) in the compartment.

8. The energy storage cabinet according to claim 7, characterized in that, The elastic force between the clamping plate (140) and the side panel (130) is adjustable; a plurality of pressure detection elements (170) are provided on the clamping plate (140) at intervals, and the pressure detection elements (170) are used to detect the pressure value between the clamping plate (140) and the battery cell (110).

9. The energy storage cabinet according to claim 7, characterized in that, An elastic medium layer (150) is provided between the side panel (130) and the clamping plate (140), and the elastic medium layer (150) is a rubber layer, a foam layer or a spring sheet layer; Alternatively, a plurality of spring elements (160) may be provided between the side panel (130) and the clamping plate (140).

10. An energy storage system, characterized in that, Includes the energy storage cabinet as described in any one of claims 1 to 9.

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