Energy storage device

Abstract

The utility model provides an energy storage device. The energy storage device comprises a battery cabinet, at least two battery clusters and a cooling unit. The battery cabinet comprises a box body, partition plates and end plates. The partition plate is arranged in the box body and divides the box body into a cooling bin and a battery bin. The end plate is arranged in the battery bin and divides the battery bin into at least two containing cavities in the first direction. The end plate is provided with an air inlet, a ventilation cavity and an air outlet. The ventilation cavity is communicated with the air inlet and the air outlet. Each battery cluster is of an integral structure integrated by at least two battery monomers and a cooling plate positioned between the battery monomers, and at least one battery cluster is accommodated in each accommodating cavity. The cooling unit is installed in the cooling bin and comprises a dehumidification unit and a cooling unit. The dehumidification unit communicates with the air inlet and is used for guiding air into the ventilation cavity through the air inlet. And the gas outlet is used for enabling gas in the ventilation cavity to flow out to the battery cluster. The cooling unit is communicated with the cooling plate to form a heat dissipation channel, and the heat dissipation channel is used for allowing a refrigerant to circularly flow so as to dissipate heat of the battery monomers.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an energy storage device. Background Art

[0002] With the continuous development of power generation technology and the increase in the scale of new energy power generation, energy storage devices have been more and more widely promoted and applied. Usually, the energy storage device includes a box, multiple battery clusters arranged in the box, and a high-voltage box for managing the battery modules in the battery cluster. As a key system structure of energy storage technology, the stable operation of the battery cluster is particularly critical. In order to ensure the stable operation of the battery cluster, a liquid cooling unit is usually designed to cool and dissipate the heat of the battery cells in the battery cluster.

[0003] When the liquid cooling unit is cooling the battery cells, if the temperature of the cooling plate itself is low and the humidity in the box is high, condensation will appear on the cooling plate. If the condensation is not handled in time, it will easily cause leakage or component damage if it comes into contact with live components, leading to dangerous accidents. In addition, if the electrical components in the energy storage device are operated in a high humidity environment for a long time, the service life of the electrical components will be shortened. Utility Model Content

[0004] In view of the above problems, the present application provides an energy storage device that can at least solve the problem that when cooling and dissipating heat for battery cells, untreated condensed water comes into contact with charged components, causing leakage or component damage, thereby leading to dangerous accidents.

[0005] In a first aspect, the present application provides an energy storage device, which includes a battery cabinet, at least two battery clusters, and a cooling unit installed in the cooling bin. The battery cabinet includes a box, a partition, and an end plate. The partition is arranged in the box and divides the box into a cooling bin and a battery bin. The end plate is arranged in the battery bin and divides the battery bin into at least two accommodating chambers in a first direction. The end plate is provided with an air inlet, a ventilation cavity, and an air outlet. The ventilation cavity is connected to both the air inlet and the air outlet. The battery cluster is an integral structure integrated by at least two battery cells and a cooling plate located between the battery cells, and at least one battery cluster is arranged in each accommodating chamber. The cooling unit includes a dehumidification unit and a cooling unit. The dehumidification unit is connected to the air inlet and is used to introduce gas into the ventilation cavity through the air inlet. The air outlet is used for the gas in the ventilation cavity to flow out to the battery cluster in the accommodating chamber, and the cooling unit is connected to the cooling plate to form a heat dissipation channel. The heat dissipation channel is used for circulating a refrigerant to dissipate heat from the battery cells.

[0006] In the above technical solution, the energy storage device is connected to the cooling plate through the cooling unit, so that a heat dissipation channel for circulating refrigerant is formed between the battery clusters, which can dissipate heat for the battery cells. The energy storage device is also connected to the air inlet of the partition through the dehumidification unit, and gas is introduced into the ventilation cavity of the partition from the air inlet. The gas in the ventilation cavity flows out from the air outlet to the battery cluster in the accommodating cavity, so that condensed water formed in the process of heat dissipation of the battery cells by the cooling unit can be removed, which can avoid leakage and damage to charged components. On the one hand, it can ensure the safety of the use of the energy storage device, and on the other hand, it can extend the service life of the electrical components in the energy storage device.

[0007] As an optional technical solution of the present application, at least two of the battery clusters are arranged along the first direction and supported on the bottom of the battery compartment, and the end plate abuts against the side surfaces of the battery clusters.

[0008] In the above technical solution, the battery cluster is carried at the bottom of the battery compartment, and the end plate is in contact with the side of the battery cluster, which can provide the battery cluster with lateral (first direction) clamping force and longitudinal (second direction) supporting force, thereby firmly fixing the battery cluster in the battery compartment; on the other hand, compared with the traditional solution in which the battery module (including a shell and a battery cell arranged in the shell) is fixedly installed in the battery compartment through a supporting structure (including a lateral load-bearing beam and a longitudinal load-bearing beam), the present technical solution cancels the supporting structure, thereby increasing the installation space actually used to install the battery cluster in the battery compartment.

[0009] As an optional technical solution of the present application, the battery cells are glued to each other, and the cooling plates are glued to the battery cells to form a battery cluster with an integral structure.

[0010] In the above technical solution, the battery cells are directly glued to each other, and the cooling plate is directly glued to the battery cells, which eliminates the concept of battery modules in the traditional solution and saves the shell and seals used to encapsulate the battery cells. On the one hand, it saves costs, and on the other hand, it can also improve the space utilization of the battery compartment, that is, it can accommodate more battery cells.

[0011] As an optional technical solution of the present application, each of the battery clusters includes at least two battery cells. Each of the battery cells includes at least two battery cells. In each of the battery cells, at least two of the battery cells are arranged along the first direction and / or along the second direction. The cooling plate is arranged between two adjacent battery cells. The battery cells and the cooling plate are arranged alternately along the first direction or the second direction in sequence, and the first direction is perpendicular to the second direction.

[0012] In the above technical solution, the battery cells and the cooling plates are arranged alternately along the first direction or the second direction, which enables the cooling plates and the battery cells to fully contact each other, thereby reducing the temperature, and can provide a more flexible arrangement to adapt to different accommodating cavities.

[0013] As an optional technical solution of the present application, the end plate is provided with the air outlet at least on a side facing the battery cluster.

[0014] In the above technical solution, the gas outlet is at least arranged on the side facing the battery cluster, so that the gas can reach the battery cluster with less loss, thereby promoting the circulation of gas between the battery clusters and improving the efficiency and effect of eliminating condensed water.

[0015] As an optional technical solution of the present application, the thickness of the end plate in the first direction is adjustable, so that the size of the accommodating cavity in the first direction is adjustable.

[0016] In the above technical solution, the thickness of the end plate in the first direction is adjustable. Compared with the traditional solution in which a certain space needs to be reserved in the first direction in order to ensure the disassembly and assembly error / tolerance of the battery cluster, the end plate with adjustable thickness can adapt to the disassembly and assembly error / tolerance, and there is no need to reserve space in the first direction, which can save space in the battery compartment in the first direction, so that more battery cells can be loaded in the battery compartment, thereby increasing the overall battery capacity of the energy storage device.

[0017] As an optional technical solution of the present application, the ventilation cavity includes a first cavity. The air inlet includes a first air inlet. The air outlet includes a first air outlet. The first air inlet and the first air outlet are all connected to the first cavity. The end plate includes a first plate body, a second plate body and a first connecting member. The first plate body is fixedly mounted on the battery compartment. The second plate body is movably mounted on the battery compartment. The second plate body is spaced apart from the first plate body and together with the first plate body, forms the first cavity. The first air inlet is located at the top and / or bottom of the first cavity. The first air outlet is provided on the second plate body. The first connecting member is located in the first cavity and connects the first plate body and the second plate body. The first connecting member can be extended or deformed to adjust the distance between the second plate body and the first plate body in the first direction.

[0018] In the above technical solution, on the one hand, the energy storage device is connected to the first cavity through the first air inlet and the first air outlet respectively, so that the gas can flow out to the battery cluster in the accommodating cavity, thereby removing condensed water; on the other hand, the energy storage device can expand or deform by using the first connecting member, and the distance between the second plate body and the first plate body in the first direction can be adjusted. Compared with the traditional solution that needs to reserve a certain space in the first direction in order to ensure the disassembly and assembly error / tolerance of the battery cluster, the distance between the second plate body and the first plate body is adjustable and can adapt to the disassembly and assembly error / tolerance of the battery cluster on one side of the end plate, and there is no need to reserve space for the battery cluster on this side in the first direction, thereby facilitating the disassembly and assembly and maintenance of the battery cluster.

[0019] As an optional technical solution of the present application, the first connecting member includes a plurality of connecting rods, which are hinged end to end and enclose a hollow polygonal deformable structure.

[0020] In the above technical solution, the first connecting member is a hollow polygonal deformable structure formed by a plurality of connecting rods hinged end to end. When the second plate moves closer to or away from the first plate, the second plate can drive the plurality of connecting rods to move relative to each other, thereby adjusting the size of the hollow space of the polygonal deformable structure, thereby realizing the adjustment of the distance between the second plate and the first plate.

[0021] As an optional technical solution of the present application, the first connecting member is an elastic telescopic member. The opposite ends of the elastic telescopic member are respectively connected to the first plate body and the second plate body. The elastic telescopic member can be elastically deformed when subjected to force.

[0022] In the above technical solution, the first connecting member is an elastic telescopic member. When the second plate moves closer to or farther from the first plate, the second plate can compress the elastic telescopic member or pull up the elastic telescopic member, thereby adjusting the deformation of the elastic telescopic member, thereby adjusting the distance between the second plate and the first plate. At the same time, the elastic telescopic member has a simple structure, low cost, and is easy to install.

[0023] As an optional technical solution of the present application, the first connecting member is a hard telescopic member. The hard telescopic member includes a stator and a mover. One of the stator and the mover is connected to the first plate body, and the other is connected to the second plate body. The mover can be telescopic relative to the stator.

[0024] In the above technical solution, the first connecting member is a hard telescopic member including a stator and a mover. The mover can be telescoped relative to the stator to drive the second plate body to approach or move away from the first plate body, thereby actively adjusting the distance between the second plate body and the first plate body, with a high degree of automation.

[0025] As an optional technical solution of the present application, the ventilation cavity also includes a second cavity. The air inlet includes a second air inlet. The air outlet includes a second air outlet. The second air inlet is connected to the second air outlet and the second cavity. The end plate also includes a third plate and a second connecting member. The third plate is movably mounted on the battery compartment. The third plate is spaced apart from the first plate and forms the second cavity together with the first plate. The second air inlet is located at the top and / or bottom of the second cavity. The second air outlet is provided on the third plate. A connecting hole is provided on the first plate. The first cavity is connected to the second cavity through the connecting hole to form the ventilation cavity. The second connecting member is located in the second cavity and connects the first plate and the third plate. The second connecting member can be extended or deformed to adjust the distance between the third plate and the first plate in the first direction.

[0026] In the above technical solution, the energy storage device can expand and contract or deform using the second connecting member, and can adjust the distance between the third plate and the first plate in the first direction. Compared with the traditional solution that needs to reserve a certain space in the first direction in order to ensure the disassembly and assembly error / tolerance of the battery cluster, the distance between the third plate and the first plate is adjustable and can adapt to the disassembly and assembly error / tolerance of the battery cluster on one side of the end plate. There is no need to reserve space for the battery cluster on this side in the first direction, thereby facilitating the disassembly and assembly and maintenance of the battery cluster.

[0027] As an optional technical solution of the present application, the second connecting member includes a plurality of connecting rods, which are hinged end to end and enclose a hollow polygonal deformable structure.

[0028] In the above technical solution, the second connecting member is a hollow polygonal deformable structure formed by multiple connecting rods hinged at the end. When the third plate moves closer to or away from the first plate, the third plate can drive the multiple connecting rods to move relative to each other, thereby adjusting the size of the hollow space of the polygonal deformable structure, thereby realizing the adjustment of the distance between the third plate and the first plate.

[0029] As an optional technical solution of the present application, the second connecting member is an elastic telescopic member. The opposite ends of the elastic telescopic member are respectively connected to the third plate body and the second plate body. The elastic telescopic member can be elastically deformed when subjected to force.

[0030] In the above technical solution, the second connecting member is an elastic telescopic member. When the third plate moves closer to or farther from the first plate, the third plate can compress the elastic telescopic member or pull up the elastic telescopic member, thereby adjusting the deformation of the elastic telescopic member, thereby adjusting the distance between the third plate and the first plate. At the same time, the elastic telescopic member has a simple structure, low cost, and is easy to install.

[0031] As an optional technical solution of the present application, the second connecting member is a hard telescopic member. The hard telescopic member includes a stator and a mover. One of the stator and the mover is connected to the first plate body, and the other is connected to the third plate body. The mover can be telescopic relative to the stator.

[0032] In the above technical solution, the second connecting member is a hard telescopic member including a stator and a mover. The mover can be telescopic relative to the stator to drive the third plate body to approach or move away from the first plate body, so as to actively adjust the distance between the third plate body and the first plate body, and the degree of automation is relatively high.

[0033] As an optional technical solution of the present application, the first air outlet, the connecting hole and the second air outlet are aligned in the first direction.

[0034] In the above technical solution, the first air outlet, the connecting hole and the second air outlet are aligned in a first direction, and the gas flowing into the ventilation cavity from the air inlet can flow freely and unimpeded in the first cavity and the second cavity. This can improve the flow efficiency of the gas flowing from the first air outlet and the second air outlet to the battery cluster, thereby improving the effect and efficiency of removing condensed water through air cooling.

[0035] As an optional technical solution of the present application, the cooling unit further includes a dehumidification channel. The dehumidification channel is arranged in the battery cabinet. The inlet of the dehumidification channel is connected to the dehumidification unit. The outlet of the dehumidification channel is connected to the air inlet.

[0036] In the above technical solution, the outlet of the dehumidification channel is connected to the air inlet, so that the gas generated by the dehumidification unit can be introduced into the air inlet through the dehumidification channel and used to remove condensed water.

[0037] As an optional technical solution of the present application, the dehumidification channel includes at least two outlets. The air inlet portions at opposite ends of the end plate at least in a third direction correspond to one outlet of the dehumidification channel respectively, and the third direction is perpendicular to the first direction.

[0038] In the above technical solution, the air inlet parts of the end plate at least at the two opposite ends in the third direction respectively correspond to the outlet of a dehumidification channel, which can further improve the gas circulation and enhance the effect of removing condensed water.

[0039] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0041] Figure 1 A schematic diagram of the three-dimensional structure of an energy storage device according to some embodiments of the present application;

[0042] Figure 2 for Figure 1 The three-dimensional structural schematic diagram of the energy storage device shown in FIG. 1 with the cover removed;

[0043] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of a battery cluster in the energy storage device shown;

[0044] Figure 4 for Figure 1 A schematic diagram of a three-dimensional structure of an end plate of the energy storage device shown in one perspective;

[0045] Figure 5 for Figure 1 A schematic diagram of the three-dimensional structure of the end plate of the energy storage device shown in another perspective;

[0046] Figure 6 for Figure 4 An enlarged schematic diagram of the end plate VI of the energy storage device shown;

[0047] Figure 7 A schematic diagram of a case where the connecting member of the end plate of the energy storage device is an elastic telescopic member;

[0048] Figure 8 A schematic diagram of a case where the connecting member of the end plate of the energy storage device is a hard telescopic member;

[0049] Fig. 9 for Figure 1 A schematic diagram of a dehumidification channel of an energy storage device shown in front view;

[0050] Fig.10 for Figure 1 A schematic diagram of a dehumidification channel of an energy storage device is shown in a top view.

[0051] The reference numerals in the specific implementation manner are as follows:

[0052] Energy storage device 100;

[0053] Battery cabinet 10, box body 11, cooling chamber 111, battery chamber 113, accommodating cavity 1131, bottom 1133 of box body, bottom 1135 of battery chamber, cover body 12, partition 13, end plate 15, air inlet 151, first air inlet 1511, second air inlet 1513, ventilation cavity 152, first cavity 1521, second cavity 1523, air outlet 153, first air outlet 1531, second air outlet 1533, first plate body 154, second plate body 155, first connecting member 156, third plate body 157, second connecting member 158, polygonal deformable structure 1591, connecting rod 15911, hollow space 15913, elastic telescopic member 1593, hard telescopic member 1595, stator 15951, mover 15953, connecting hole 1597;

[0054] Battery cluster 30 , battery unit 31 , battery cell 311 , cooling plate 33 , side 301 of battery cluster, top 303 of battery cluster, bottom 305 of battery cluster;

[0055] Cooling unit 50, dehumidification unit 51, cooling unit 53, dehumidification channel 55, first dehumidification outlet 551, second dehumidification outlet 553, first direction X, second direction Y, third direction Z. DETAILED DESCRIPTION

[0056] The following detailed description of the implementation of the technical solution of the present application is provided in conjunction with the accompanying drawings. The following implementation is only used to more clearly illustrate the technical solution of the present application, and is therefore only used as an example, and cannot be used to limit the scope of protection of the present application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific implementation methods and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0058] In the description of the implementation methods of this application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the implementation methods of this application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0059] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0060] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0061] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0062] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "liquid level", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0063] In the description of the implementation methods of the present application, unless otherwise clearly stipulated and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two+ elements.

[0064] See also Figure 1 and Figure 2The present application provides an energy storage device 100, which includes: a battery cabinet 10, at least two battery clusters 30 and a cooling unit 50. The battery cabinet 10 includes a box 11, a partition 13 and an end plate 15. The partition 13 is arranged in the box 11 and divides the box 11 into a cooling chamber 111 and a battery chamber 113. The end plate 15 is arranged in the battery chamber 113 and divides the battery chamber 113 into at least two accommodating chambers 1131 in a first direction X. Figure 4 or Figure 5 The end plate 15 is provided with an air inlet 151, a vent cavity 152 and an air outlet 153. The vent cavity 152 is connected to both the air inlet 151 and the air outlet 153. Figure 3 The battery cluster 30 is an integral structure integrated by at least two battery cells 311 and a cooling plate 33 located between the battery cells 311. At least one battery cluster 30 is accommodated in each accommodating cavity 1131. The cooling unit 50 is installed in the cooling bin 111. The cooling unit 50 includes a dehumidification unit 51 and a cooling unit 53. The dehumidification unit 51 is connected to the air inlet 151 and is used to introduce gas into the ventilation cavity 152 through the air inlet 151. The air outlet 153 is used for the gas in the ventilation cavity 152 to flow out to the battery cluster 30 in the accommodating cavity 1131. The cooling unit 53 is connected to the cooling plate 33 to form a heat dissipation channel (not shown). The heat dissipation channel is used for the circulation of refrigerant to dissipate heat from the battery cells 311.

[0065] Among them, a rectangular coordinate system is established with the length, width and height of the battery cabinet 10 as three axes. In some embodiments, the first direction X is the height direction of the battery cabinet 10, the second direction Y is the length direction of the battery cabinet 10, and the third direction Z is the width direction of the battery cabinet 10. In other embodiments, the first direction X is the length direction of the battery cabinet 10, the second direction Y is the height direction of the battery cabinet 10, and the third direction Z is the width direction of the battery cabinet 10. In still other embodiments, the first direction X is the width direction of the battery cabinet 10, the second direction Y is the length direction of the battery cabinet 10, and the third direction Z is the height direction of the battery cabinet 10. This application only takes the example that the first direction X is the length direction of the battery cabinet 10, the second direction Y is the height direction of the battery cabinet 10, and the third direction Z is the width direction of the battery cabinet 10. Figure 1 shown.

[0066] Specifically, in some embodiments of the present application, the battery cabinet 10 includes a box body 11 and a cover body 12. The cross-section of the battery cabinet 10 (the plane cut by the XZ plane) can be, but is not limited to, circular, elliptical, square or other polygonal. The material of the battery cabinet 10 includes, but is not limited to, metal or non-metal. Among them, metals include aluminum, iron, steel, aluminum alloy or iron alloy, etc., while non-metals include, but are not limited to plastics, etc. In the present application, the cross-section of the battery cabinet 10 is square, so that it can be easily integrated into the energy storage device 100. In the present application, the material of the battery cabinet 10 is aluminum alloy, so that while ensuring the rigidity, it can also make the energy storage device 100 lighter and easier to transport.

[0067] More specifically, the box body 11 and the cover body 12 are combined to form a battery cabinet 10, and the battery cluster 30 is contained in the battery compartment 113 of the box body 11. The box body 11 is a component in the battery cabinet 10 that loads and supports the battery cluster 30. One end of the box body 11 is closed, and the other end is provided with an opening. The opening is used for the battery cluster 30 to be loaded into the box body 11. The cover body 12 is a component in the battery cabinet 10 that covers the opening. The connection between the box body 11 and the cover body 12 can be detachably connected or non-detachably connected. The detachable connection includes but is not limited to a screw connection, a snap connection, or a combination of a screw connection and a snap connection. The non-detachable connection includes but is not limited to a glue connection, a welding connection, or a combination of a glue connection and a welding connection. In the present application, the box body 11 and the cover body 12 are detachably connected. In the present application, the cover body 12 is a cabinet door that can be opened and closed.

[0068] In addition, when the battery cabinet 10 includes a box body 11 and a cover body 12, the battery cabinet 10 may not be limited to being made of one material. For example, the box body 11 and the cover body 12 may be made of the same material, both of which are aluminum alloy. The battery cabinet 10 may also be made of different materials for different components. For example, the box body 11 is made of a metal material, and the cover body 12 is made of plastic. Of course, the material of the box body 11 and the material of the cover body 12 may also be a combination of other different materials, which are not listed here one by one.

[0069] More specifically, the box 11 is a container in which objects can be placed. In an embodiment of the present application, the box 11 is a component in the battery cabinet 10 that loads and supports the battery cluster 30. The partition 13 is arranged in the box 11, and is used to separate the box 11 of the battery cabinet 10 into a cooling compartment 111 and a battery compartment 113. The connection between the partition 13 and the box 11 can be detachably connected or non-detachably connected. The detachable connection includes but is not limited to a screw connection, a snap connection, or a combination of a screw connection and a snap connection. The non-detachable connection includes but is not limited to a glue connection, a welding connection, or a combination of a glue connection and a welding connection. In the present application, the partition 13 is detachably connected to the box 11.

[0070] Among them, the partition 13 can separate the box body 11 of the battery cabinet 10 into the cooling chamber 111 and the battery chamber 113, and make the two chambers into independent sealed chambers, so that the cooling chamber 111 and the battery chamber 113 interfere with each other. For example, the partition 13 can block the gas introduced into the battery chamber 113 by the dehumidification unit 51 from entering the cooling chamber 111, that is, the partition 13 confines the dehumidification gas to the battery chamber 113, which can enhance the circulation of the gas in the battery chamber 113 and further improve the efficiency of removing condensed water. For another example, the components in the cooling chamber 111 will generate heat or emit radiation, and the partition 13 can block the heat or radiation from being transmitted to the battery chamber 113, thereby ensuring that the battery cells 311 in the battery chamber 113 can work normally and stably.

[0071] Specifically, the end plate 15 is disposed in the battery compartment 113 and is detachably connected to the box body 11. The end plate 15 is connected to the bottom 1133 of the box body. In the present application, the bottom 1133 of the box body is the bottom of the inner wall of the box body 11. The end plate 15 can divide the battery compartment 113 into at least two accommodating chambers 1131 in the first direction X. There is at least one battery cluster 30 in each accommodating chamber 1131. In an embodiment of the present application, a total of eight end plates 15 are provided in the box body 11. The end plate 15 divides the battery compartment 113 in the box body 11 into seven accommodating chambers 1131, and each accommodating chamber 1131 contains a battery cluster 30. In other embodiments of the present application, different numbers of end plates 15 can be set according to different needs to meet the needs.

[0072] More specifically, see Figure 4 and Figure 5 , the end plate 15 is provided with an air inlet 151, a ventilation cavity 152 and an air outlet 153. The ventilation cavity 152 is located on the body of the end plate 15. The air inlet 151 and the air outlet 153 are arranged on any plate surface of the end plate 15. The ventilation cavity 152, the air inlet 151 and the air outlet 153 are all connected, so that the end plate 15 can exchange gas with the outside in the first direction X, the second direction Y and the third direction Z. It can be understood that in other embodiments, the setting of the air inlet 151, the ventilation cavity 152 and the air outlet 153 can also only allow the end plate 15 to exchange gas with the outside in the first direction X and the second direction Y, or to exchange gas with the outside in the third direction Z and the second direction Y, etc., which are not listed here one by one.

[0073] See also Figure 2 Specifically, the cooling chamber 111 is used to store the cooling unit 50 and other functional electronic devices, thereby isolating the battery cluster 30 in the battery chamber 113 from other functional electronic devices, which is convenient for unified maintenance and management. The battery chamber 113 is used to store the battery cluster 30.

[0074] Please also read Figures 2 to 5In some embodiments of the present application, the cooling unit 50 includes a dehumidification unit 51 and a cooling unit 53. The dehumidification unit 51 is arranged inside the cooling bin 111, and is used to provide gas for removing condensed water. The dehumidification unit 51 is connected to the air inlet 151 of the end plate 15. In some embodiments of the present application, the dehumidification unit 51 is a box structure, which can be at least one of a fan, a centrifugal fan, and a blower. In other embodiments of the present application, the dehumidification unit 51 can be any electronic device that can generate airflow and has a power that meets the requirements for removing condensed water. The cooling unit 53 is a box structure, which integrates electronic devices such as a compressor, an evaporator, a condenser, and a liquid storage dryer. The cooling unit 53 can be set at any position in the cooling bin 111.

[0075] A battery cell 311 is the smallest unit for storing and releasing electrical energy. Multiple battery cells 311 can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells 311 are connected in series and in parallel. Multiple battery cells 311 can be directly connected in series, in parallel, or in mixed connection. In the present application, each battery cluster 30 includes at least two battery cells 31, and each battery cell 31 includes at least two battery cells 311. That is, a battery cell 31 composed of at least two battery cells 311, and at least two battery cells 31 constitute a battery cluster 30, and the battery cells 311, the battery cells 31, and the battery cluster 30 can all store and release energy.

[0076] Specifically, please combine Figure 3 The battery cluster 30 is an integral structure composed of at least two battery cells 311 and a cooling plate 33 located between the battery cells 311. The battery cluster 30 is disposed in the accommodating cavity 1131. At least one battery cluster 30 is accommodated in each accommodating cavity 1131. It is understood that the number of battery cells 311 in the battery cluster 30 can be adaptively adjusted according to the application scenario and capacity of the battery cluster 30.

[0077] The cooling plate 33 is connected with the cooling unit 53 to form a heat dissipation channel, and the cooling unit 53 is connected with the cooling plate 33 to form a heat dissipation channel, which can supply refrigerant to circulate to dissipate heat to the battery cells 311, and is connected with the air inlet 151 of the end plate 15 through the dehumidification unit 51, and gas is introduced into the ventilation cavity 152 of the end plate 15 from the air inlet 151, and the gas in the ventilation cavity 152 flows out from the air outlet 153 to the battery cluster 30 in the accommodating cavity 1131, so that condensed water formed in the process of heat dissipation of the battery cells 311 by the cooling unit 53 can be removed, thereby avoiding leakage and damage to charged components.

[0078] In the above technical solution, on the one hand, the energy storage device 100 is connected with the cooling plate 33 through the cooling unit 53, and a heat dissipation channel is formed between the battery clusters 30, which can provide a refrigerant for circulation, thereby dissipating heat for the battery cells 311, and is connected with the air inlet 151 of the end plate 15 through the dehumidification unit 51, and gas is introduced into the ventilation cavity 152 of the end plate 15 from the air inlet 151, and the gas in the ventilation cavity 152 flows out from the air outlet 153 to the battery cluster 30 in the accommodating cavity 1131, so that condensed water formed in the process of heat dissipation of the battery cells 311 by the cooling unit 53 can be removed, leakage and damage to charged components can be avoided, which can not only ensure the safety of the energy storage device 100, but also extend the service life of the electrical components in the energy storage device 100.

[0079] On the other hand, the end plate 15 is arranged in the battery compartment 113, which can provide lateral (first direction X) clamping force and longitudinal (second direction Y) supporting force for the battery cluster 30. Compared with the traditional solution in which the battery module (including a shell and a battery cell arranged in the shell) is fixedly installed in the battery compartment 113 through a supporting structure (including a lateral load-bearing beam and a longitudinal load-bearing beam), the present application cancels the supporting structure and increases the installation space actually used to install the battery cluster 30 in the battery compartment 113.

[0080] On the other hand, the energy storage device 100 is directly combined with the battery cells 311, and then the battery cluster 30 is integrated with the cooling plate 33 between the battery cells 311, thereby eliminating the concept of battery modules in the traditional solution and eliminating the shell and seals used to encapsulate the battery cells 311. On the one hand, it saves costs, and on the other hand, it can also improve the space utilization of the battery compartment 113, that is, it can accommodate more battery cells 311.

[0081] See also Figure 2 and Figure 3 In some embodiments, at least two battery clusters 30 are arranged along the first direction X and supported on the bottom 1135 of the battery compartment, and the end plate 15 abuts against the side surface 301 of the battery cluster.

[0082] Specifically, in the battery compartment 113, there are multiple accommodating cavities 1131, and the accommodating cavities 1131 can be flexibly determined according to conditions such as the number of battery clusters 30. There is at least one battery cluster 30 in each accommodating cavity 1131, and the number of battery clusters 30 can also be flexibly determined according to actual requirements. In the present application, eight end plates 15 are provided in the battery compartment 113, thereby dividing the battery compartment 113 into seven accommodating cavities 1131, and each accommodating cavity 1131 contains a battery cluster 30. The battery clusters 30 are arranged along the first direction X and carried on the bottom 1135 of the battery compartment. The end plates 15 are arranged in the battery compartment 113 and conflict with the side surfaces 301 of the battery clusters.

[0083] In the above technical solution, the battery cluster 30 is carried on the bottom 1135 of the battery compartment, and the end plate 15 is in contact with the side 301 of the battery cluster, which can provide the battery cluster 30 with a lateral (first direction X) clamping force and a longitudinal (second direction Y) supporting force, so that the battery cluster 30 can be firmly fixed in the battery compartment 113; on the other hand, compared with the traditional solution in which the battery module (including a shell and a battery cell 311 arranged in the shell) is fixedly installed in the battery compartment 113 through a supporting structure (including a lateral load-bearing beam and a longitudinal load-bearing beam), the present application cancels the supporting structure, thereby increasing the installation space actually used to install the battery cluster 30 in the battery compartment 113.

[0084] See also Figure 3 In some embodiments, the battery cells 311 are glued to each other, and the cooling plates 33 are glued to the battery cells 311 to form a battery cluster 30 with an integral structure.

[0085] Specifically, the battery cells 311 are stacked with each other, and the battery cells 311 are directly glued with each other. The battery cells 311 can be glued and arranged in any combination with other battery cells 311 in any one or more directions of the first direction X, the second direction Y, and the third direction Z, which is not limited in this application.

[0086] In the above technical solution, the battery cells 311 are directly glued to each other, and the cooling plate 33 is directly glued to the battery cells 311, which eliminates the concept of battery module in the traditional solution and saves the shell and seal for encapsulating the battery cells 311. Force can be directly applied between the battery cells 311 and the battery cells 311, between the cooling plate 33 and the battery cells 311, and between the battery cells 311 and the bottom 1135 of the battery compartment, avoiding the traditional solution (including the shell and the battery cells 311 arranged in the shell) being fixedly installed in the battery compartment 113 through the supporting structure (including the transverse load-bearing beam and the longitudinal load-bearing beam), saving space in the first direction X, the second direction Y and the third direction Z, which saves cost on the one hand and improves the space utilization rate of the battery compartment 113 on the other hand, that is, it can accommodate more battery cells 311.

[0087] See also Figure 3 In some embodiments, in each battery unit 31, at least two battery cells 311 are arranged along the first direction X and / or along the second direction Y. The cooling plate 33 is disposed between two adjacent battery cells 31. The battery cells 311 and the cooling plate 33 are arranged alternately along the first direction X or the second direction Y, and the first direction X is perpendicular to the second direction Y.

[0088] Specifically, in the present application, each battery cluster 30 includes at least two battery cells 31, and each battery cell 31 includes at least two battery cells 311. This configuration can provide higher battery energy density and system flexibility. In each battery cell 31, at least two battery cells 311 are arranged along the first direction X and / or along the second direction Y. This means that in the present application, the battery cells 311 can be arranged in the length and width of the battery compartment 113. Such a layout increases the diversity of the design, so that the energy storage device 100 can better adapt to different space constraints and power requirements.

[0089] The cooling plate 33 is disposed between two adjacent battery cells 31. The battery cells 311 and the cooling plates 33 are arranged alternately along the first direction X or the second direction Y, ensuring effective contact between the cooling plates 33 and the battery cells 311. With such a layout, the energy storage device 100 has improved cooling efficiency, which helps to maintain a suitable operating temperature of the battery cells 311, prolong their life and improve their performance.

[0090] The first direction X and the second direction Y are arranged perpendicularly, which can maximize the use of space and improve the overall compactness of the energy storage device 100. This vertical arrangement makes the arrangement of the battery cells 31 and the cooling plate 33 more flexible, helps to optimize the design of the energy storage device 100 and improve the overall performance and reliability of the energy storage device 100.

[0091] In the above technical solution, the battery cells 311 and the cooling plates 33 are arranged alternately along the first direction X or the second direction Y, so that the cooling plates 33 and the battery cells 311 are in full contact with each other, and the refrigerant in the heat dissipation channel formed by the connection between the cooling unit 53 and the cooling plate 33 can dissipate heat from the battery cells 311. In each battery unit 31, at least two battery cells 311 are arranged along the first direction X and / or along the second direction Y, so that the arrangement of the battery cluster 30 can be more flexible and more adaptable to the battery compartment 113.

[0092] See also Figure 2 and Figure 3 In some embodiments, at least one side of the end plate 15 facing the battery cluster 30 is provided with an air outlet 153 .

[0093] Specifically, two battery clusters 30 are arranged along the first direction X and supported on the bottom 1135 of the battery compartment. The end plate 15 is in conflict with the side 301 of the battery cluster. For the same battery cluster 30, the side of the end plate 15 facing the battery cluster 30 is the side in conflict with the side 301 of the battery cluster. This side is the first side of the end plate 15 in this embodiment. The other side without conflict is the second side of the end plate 15. For the same battery cluster 30, the first side of the end plate 15 in conflict with it is provided with an air outlet 153. Optionally, the second side may also be provided with an air outlet 153.

[0094] In the above technical solution, the dehumidification unit 51 is connected to the air inlet 151 of the end plate 15. In this way, the gas generated by the dehumidification unit 51 enters the ventilation cavity 152 of the end plate 15 through the air inlet 151, and then flows out to the battery cluster 30 through the air outlet 153. The energy storage device 100 is provided with an air outlet 153 on the side of the end plate 15 facing away from the battery cluster 30, which can further promote the circulation of gas between the battery clusters 30 and improve the efficiency and effect of eliminating condensed water.

[0095] See also Figure 4 In some embodiments, the thickness of the end plate 15 in the first direction X is adjustable so that the size of the accommodating cavity 1131 in the first direction X is adjustable.

[0096] Specifically, the thickness of the end plate 15 in the first direction X is adjustable, so that the thickness of the end plate 15 can be adjusted as needed to adapt to the accommodating cavities 1131 of different sizes. In other words, the end plate 15 can be adjusted according to the size and layout requirements of the battery cluster 30 by adjusting the thickness of the end plate 15, so that the size of the accommodating cavity 1131 in the first direction X can be adjusted accordingly.

[0097] In the above technical solution, the thickness of the end plate 15 in the first direction X is adjustable, which can further save space in the first direction X. The thickness of the end plate 15 of the energy storage device 100 can be adjusted according to actual conditions, so that the size of the accommodating cavity 1131 in the first direction X can be flexibly adjusted. Compared with the traditional solution that requires a certain space to be reserved in the first direction X in order to ensure the disassembly and assembly error / tolerance of the battery cluster, the end plate 15 with adjustable thickness can adapt to the disassembly and assembly error / tolerance, and there is no need to reserve space in the first direction X, which can save the space of the battery compartment 113 in the first direction X, so that more battery cells 311 can be loaded in the battery compartment 113, thereby increasing the overall battery capacity of the energy storage device 100.

[0098] Please also read Figure 2 and Figure 4In some embodiments, the ventilation cavity 152 includes a first cavity 1521. The air inlet 151 includes a first air inlet 1511. The air outlet 153 includes a first air outlet 1531. The first air inlet 1511 and the first air outlet 1531 are both connected to the first cavity 1521. The end plate 15 includes a first plate body 154, a second plate body 155 and a first connecting member 156. The first plate body 154 is fixedly mounted on the battery compartment 113. The second plate body 155 is movably mounted on the battery compartment 113. The second plate body 155 is spaced apart from the first plate body 154 and together with the first plate body 154, forms a first cavity 1521. The first air inlet 1511 is located at the top and / or bottom of the first cavity 1521. The first air outlet 1531 is provided on the second plate body 155. The first connecting member 156 is located in the first cavity 1521 and connects the first plate body 154 and the second plate body 155. The first connecting member 156 can be extended or deformed to adjust the distance between the second plate body 155 and the first plate body 154 in the first direction X.

[0099] Specifically, the ventilation cavity 152 is a space inside the end plate 15. The first cavity 1521 is formed by the first plate body 154 and the second plate body 155 being spaced apart and opposite to each other. The first connecting member 156 is located in the first cavity 1521 and connects the first plate body 154 and the second plate body 155, and can be expanded or deformed. The first connecting member 156 adjusts the volume of the first cavity 1521 by adjusting the distance between the second plate body 155 and the first plate body 154 in the first direction X. In the present application, the first air inlet 1511 and the first air outlet 1531 are both connected to the first cavity 1521, thereby forming a channel for gas flow. The channel can allow the gas to flow smoothly to the battery cluster 30 in the accommodating cavity 1131. Specifically, the gas enters the first cavity 1521 from the first air inlet 1511 and then flows out from the first air outlet 1531 to the battery cluster 30 on the first side of the end plate 15 (the side where the second plate body 155 is located) to dehumidify the battery cluster 30 on this side.

[0100] Specifically, the first air inlet 1511 is one or more openings on the end plate 15, and is used to introduce external air generated by the dehumidification unit 51 (a fan in the present application) into the ventilation cavity 152. The first air inlet 1511 is located at the top and / or bottom of the first cavity 1521, and is connected to the first cavity 1521 and the first air outlet 1531, and can allow external air to enter the first cavity 1521 and flow out from the first air outlet 1531 to the battery cluster 30 on the first side of the end plate 15, and take away the condensed water on the battery cluster 30 on this side.

[0101] The first gas outlet 1531 is also one or more openings on the second plate 155 , and is used to discharge the gas in the first cavity 1521 , so that the gas in the first cavity 1521 flows out to the battery cluster 30 in the accommodating cavity 1131 , promoting the circulation of the gas.

[0102] The end plate 15 is a component installed in the battery compartment 113 of the energy storage device 100. In some embodiments, the end plate 15 may include a first plate 154 and a second plate 155. The first plate 154 is fixed in the battery compartment 113 and connected to the bottom 1135 of the battery compartment. The first connecting member 156 connecting the first plate 154 and the second plate 155 can be extended or deformed, and correspondingly, the second plate 155 can be movably installed in the battery compartment 113. The second plate 155 is spaced apart from the first plate 154, and together with the first plate 154, forms a first cavity 1521.

[0103] Specifically, the first connecting member 156 is located in the first cavity 1521. The first connecting member 156 connects the first plate 154 and the second plate 155. The first connecting member 156 has a retractable or deformable characteristic, and can adjust the distance between the second plate 155 and the first plate 154 in the first direction X. The function of the first connecting member 156 is to provide an adjustment space when the end plate 15 adjusts its position, so as to obtain a receiving cavity 1131 of different volumes, so as to adapt to different battery cluster 30 sizes and layout requirements.

[0104] In the above technical solution, the energy storage device 100, on the one hand, is connected with the first cavity 1521 through the first air inlet 1511 and the first air outlet 1531, respectively, to form a gas flow channel. When the fan inside the energy storage device 100 is working, the generated gas enters the first cavity 1521 through the first air inlet 1511, flows to the first air outlet 1531 through the channel, and finally flows out to the battery cluster 30 in the accommodating cavity 1131 to remove the condensed water generated during the heat dissipation process of the battery cluster 30. On the other hand, the energy storage device 100 can be extended or deformed by using the first connecting member 156, and the extendable or deformable characteristics of the first connecting member 156 make the position of the end plate 15 flexible to adjust, and the distance between the second plate body 155 and the first plate body 154 in the first direction X can be adjusted. Compared with the traditional solution in which a certain space needs to be reserved in the first direction X in order to ensure the disassembly and assembly error / tolerance of the battery cluster, the distance between the second plate 155 and the first plate 154 is adjustable and can adapt to the disassembly and assembly error / tolerance of the battery cluster 30 on one side of the end plate 15. There is no need to reserve space for the battery cluster 30 on this side in the first direction X, thereby facilitating the disassembly and assembly and maintenance of the battery cluster, thereby ensuring the efficient operation and convenience of maintenance of the energy storage device 100.

[0105] See also Figures 4 to 6 In some embodiments, the first connecting member 156 includes a plurality of connecting rods 15911. The plurality of connecting rods 15911 are hinged end to end and enclose a hollow polygonal deformable structure 1591. The distance between the second plate 155 and the first plate 154 is positively correlated with the size of the hollow space 15913 of the first connecting member 156.

[0106] Specifically, the first connecting member 156 includes a plurality of connecting rods 15911. The plurality of connecting rods 15911 are hinged end to end to form a hollow polygonal structure. The connection of the connecting rods 15911 enables the first connecting member 156 to be deformed, and the shape and size of the first connecting member 156 can be adjusted as needed. The distance between the second plate body 155 and the first plate body 154 is positively correlated with the size of the hollow space 15913 of the first connecting member 156, that is, the larger the distance between the second plate body 155 and the first plate body 154, the larger the volume of the hollow space 15913; the smaller the distance between the second plate body 155 and the first plate body 154, the smaller the volume of the hollow space 15913.

[0107] In the above technical solution, the first connecting member 156 is a hollow polygonal deformable structure formed by a plurality of connecting rods 15911 hinged end to end. When the second plate 156 moves relative to the first plate 154 to approach or move away from each other, the second plate 155 can drive the plurality of connecting rods 15911 to move relative to each other, thereby adjusting the size of the hollow space 15913 of the polygonal deformable structure, thereby adjusting the distance between the second plate 155 and the first plate 154. The adjustable distance between the second plate 155 and the first plate 154 can adapt to the disassembly and assembly error / tolerance of the battery cluster 30 on one side of the end plate 15, and there is no need to reserve space for the battery cluster 30 on this side in the first direction X, thereby facilitating the disassembly and maintenance of the battery cluster 30, and improving the maintainability of the energy storage device 100.

[0108] See also Figure 4 , Figure 5 and Figure 7 In some embodiments, the first connecting member 156 is an elastic member 1593. The opposite ends of the elastic member 1593 are respectively connected to the first plate 154 and the second plate 155. The elastic member 1593 can be elastically deformed when subjected to force. The distance between the second plate 155 and the first plate 154 is negatively correlated with the deformation of the elastic member 1593.

[0109] Specifically, the first connecting member 156 is a spring or made of elastic material, and the opposite ends of the first connecting member 156 are respectively connected to the first plate 154 and the second plate 155. When subjected to external force, the elastic stretch member 1593 will undergo elastic deformation, and this deformation will cause the distance between the second plate 155 and the first plate 154 to change. In some embodiments, the distance between the second plate 155 and the first plate 154 is negatively correlated with the deformation of the elastic stretch member 1593, that is, the greater the distance between the second plate 155 and the first plate 154, the smaller the deformation of the elastic stretch member 1593 (the closer to the natural state without deformation); the smaller the distance between the second plate 155 and the first plate 154, the greater the deformation of the elastic stretch member 1593 (the more compressed). In other embodiments, the distance between the second plate 155 and the first plate 154 is positively correlated with the deformation of the elastic expansion member 1593, that is, the greater the distance between the second plate 155 and the first plate 154, the greater the deformation of the elastic expansion member 1593 (the more stretched); the smaller the distance between the second plate 155 and the first plate 154, the greater the deformation of the elastic expansion member 1593 (the closer to the natural state without deformation). Therefore, the energy storage device 100 can control the distance between the second plate 155 and the first plate 154 by adjusting the deformation of the elastic expansion member 1593.

[0110] In the above technical solution, the first connecting member 156 is an elastic elastic member 1593. When the second plate 155 moves relative to the first plate 154 and approaches or moves away from each other, the second plate 155 can compress the elastic elastic member 1593 or pull up the elastic elastic member 1593, thereby adjusting the deformation of the elastic elastic member 1593, thereby adjusting the distance between the second plate 155 and the first plate 154. At the same time, the elastic elastic member 1593 has a simple structure, low cost, and is easy to install, which makes it easier to disassemble and maintain the battery cluster 30, thereby improving the maintainability of the energy storage device 100.

[0111] See also Figure 4 , Figure 5 and Figure 8 In some embodiments, the first connecting member 156 is a rigid telescopic member 1595. The rigid telescopic member 1595 includes a stator 15951 and a mover 15953. One of the stator 15951 and the mover 15953 is connected to the first plate 154, and the other is connected to the second plate 155. The mover 15953 can be telescopic relative to the stator 15951. The distance between the second plate 155 and the first plate 154 is positively correlated with the telescopic amount of the rigid telescopic member 1595.

[0112] Specifically, the first connecting member 156 can be composed of a stator 15951 and a mover 15953. One of the stator 15951 and the mover 15953 is connected to the first plate 154, and the other is connected to the second plate 155. The mover 15953 can be telescopic relative to the stator 15951, thereby changing the distance between the second plate 155 and the first plate 154. Specifically, the distance between the second plate 155 and the first plate 154 is positively correlated with the telescopic amount of the hard telescopic member 1595. That is, the greater the distance between the second plate 155 and the first plate 154, the greater the telescopic amount of the hard telescopic member 1595; the smaller the distance between the second plate 155 and the first plate 154, the smaller the telescopic amount of the hard telescopic member 1595.

[0113] In the above technical solution, the first connecting member 156 is a hard telescopic member 1595 including a stator 15951 and a mover 15953. The mover 15953 can be telescopic relative to the stator 15951 to drive the second plate 155 to approach or move away from the first plate 152, so as to actively adjust the distance between the second plate 155 and the first plate 152, with a high degree of automation, making it more convenient to disassemble and maintain the battery cluster 30, and improving the maintainability of the energy storage device 100.

[0114] See also Figures 4 to 6 In some embodiments, the ventilation cavity 152 further includes a second cavity 1523. The air inlet 151 further includes a second air inlet 1513. The air outlet 153 further includes a second air outlet 1533. The second air inlet 1513 and the second air outlet 1533 are both connected to the second cavity 1523. The end plate 15 further includes a third plate body 157 and a second connecting member 158. The third plate body 157 is movably mounted on the battery compartment 113. The third plate body 157 is spaced apart from the first plate body 154 and together with the first plate body 154, encloses the second cavity 1523. The second air inlet 1513 is located at the top and / or bottom of the second cavity 1523. The second air outlet 1533 is provided on the third plate body 157, and a connecting hole 1597 is provided on the first plate body 154. The first cavity 1521 is connected to the second cavity 1523 through the connecting hole 1597 to form the ventilation cavity 152.

[0115] The second connecting member 158 is located in the second cavity 1523 and connects the first plate 154 and the third plate 157. The second connecting member 158 can be extended or deformed to adjust the distance between the third plate 157 and the first plate 154 in the first direction X.

[0116] Specifically, the ventilation cavity 152 is a space inside the end plate 15. The first cavity 1521 is connected to the second cavity 1523 through the connecting hole 1597 to form the ventilation cavity 152. The third plate body 157 and the first plate body 154 are spaced apart from each other, thereby jointly enclosing the second cavity 1523. The second connecting member 158 is located in the second cavity 1523 and can be expanded or deformed. The second connecting member 158 connects the first plate body 154 and the third plate body, and the volume of the second cavity 1523 is adjusted by adjusting the distance between the third plate body 157 and the first plate body 154 in the first direction X. In the present application, the second air inlet 1513 and the second air outlet 1533 are both connected to the second cavity 1523, thereby forming a gas flow channel, which allows the gas to flow smoothly to the battery cluster 30 in the accommodating cavity 1131.

[0117] Specifically, the second air inlet 1513 is one or more openings on the end plate 15, and is used to introduce external air generated by the dehumidification unit 51 (a fan in this application) into the ventilation cavity 152. The second air inlet 1513 is located at the top and / or bottom of the second cavity 1523, and is connected to the second cavity 1523 and the second air outlet 1533, and can allow external air to enter the second cavity 1523 and flow out from the second air outlet 1533 to the battery cluster 30 on the second side of the end plate 15, and take away the condensed water on the battery cluster 30 on this side.

[0118] The second gas outlet 1533 is also one or more openings on the third plate 157 for discharging the gas in the second cavity 1523 so that the gas in the second cavity 1523 flows out to the battery cluster 30 in the accommodating cavity 1131 to promote the circulation of the gas.

[0119] The end plate 15 further includes a third plate 157. The first plate 154 is fixed in the battery compartment 113 and connected to the bottom 1135 of the battery compartment. Since the second connecting member 158 connecting the first plate 154 and the third plate 157 can be extended or deformed, the third plate 157 can be movably installed in the battery compartment 113, spaced from the first plate 154, and together with the first plate 154, enclose the second cavity 1523.

[0120] Specifically, the second connecting member 158 is located in the second cavity 1523 and connects the first plate 154 and the third plate 157. The second connecting member 158 has a retractable or deformable characteristic, and can adjust the distance between the third plate 157 and the first plate 154 in the first direction X. The function of the second connecting member 158 is to provide an adjustment space when adjusting the end plate 15 to adjust its position, so as to obtain a receiving cavity 1131 of different volumes to adapt to different battery cluster 30 sizes and layout requirements.

[0121] In the above technical solution, the second air inlet 1513 and the second air outlet 1533 are connected through the second cavity 1523, and the first cavity 1521 and the second cavity 1523 are connected through the connecting hole 1597 to form a ventilation cavity 152, thereby forming a gas flow channel. When the fan inside the energy storage device 100 is working, the generated gas enters the second cavity 1523 through the second air inlet 1513, flows to the second air outlet 1533 through the channel, enters the first cavity 1521 through the first air inlet 1511, flows to the first air outlet 1531 through the channel, and finally enters the battery cluster 30 in the accommodating cavity 1131 on the opposite sides of the end plate 15, so as to remove the condensed water generated during the heat dissipation of the battery cluster 30 on the opposite sides of the end plate 15.

[0122] On the other hand, the energy storage device 100 can expand or deform by using the second connecting member 158, and the distance between the third plate 157 and the first plate 154 in the first direction X can be adjusted. Compared with the traditional solution in which a certain space needs to be reserved in the first direction X to ensure the disassembly and assembly error / tolerance of the battery cluster, the distance between the third plate 157 and the first plate 154 is adjustable and can adapt to the disassembly and assembly error / tolerance of the battery cluster 30 on one side of the end plate 15, and there is no need to reserve space for the battery cluster 30 on this side in the first direction X, thereby facilitating the disassembly and assembly and maintenance of the battery cluster 30, thereby ensuring efficient operation and convenient maintenance of the energy storage device 100.

[0123] See also Figures 4 to 6 In some embodiments, the second connecting member 158 includes a plurality of connecting rods 15911, which are hinged end to end and form a hollow polygonal deformable structure 1591, and the distance between the third plate body and the first plate body 154 is positively correlated with the size of the hollow space 15913 of the second connecting member 158.

[0124] Specifically, the second connecting member 158 includes a plurality of connecting rods 15911. The plurality of connecting rods 15911 are hinged end to end to form a hollow polygonal structure. The connection of the connecting rods 15911 enables the second connecting member 158 to be deformed, and the shape and size of the second connecting member 158 can be adjusted as needed. The distance between the third plate body 157 and the first plate body 154 is positively correlated with the size of the hollow space 15913 of the second connecting member 158, that is, the greater the distance between the third plate body 157 and the first plate body 154, the greater the volume of the hollow space 15913; the smaller the distance between the third plate body 157 and the first plate body 154, the smaller the volume of the hollow space 15913.

[0125] In the above technical solution, the second connecting member 158 is a hollow polygonal deformable structure formed by a plurality of connecting rods 15911 hinged end to end. When the third plate 157 moves relative to the first plate 154 to approach or move away from each other, the third plate 157 can drive the plurality of connecting rods 15911 to move relative to each other, thereby adjusting the size of the hollow space 15913 of the polygonal deformable structure, thereby adjusting the distance between the second plate 155 and the first plate 154. The adjustable distance between the third plate 157 and the first plate 154 can adapt to the disassembly and assembly error / tolerance of the battery cluster 30 on one side of the end plate 15, and there is no need to reserve space for the battery cluster 30 on this side in the first direction X, thereby facilitating the disassembly and maintenance of the battery cluster 30, and improving the maintainability of the energy storage device 100.

[0126] See also Figure 4 , Figure 5 and Figure 7 In some embodiments, the second connecting member 158 is an elastic member 1593. The opposite ends of the elastic member 1593 are respectively connected to the third plate 157 and the second plate 155. The elastic member 1593 can be elastically deformed when subjected to force. The distance between the third plate 157 and the first plate 154 is negatively correlated with the deformation of the elastic member 1593.

[0127] Specifically, the second connecting member 158 is a spring or can be made of an elastic material, and the opposite ends of the second connecting member 158 are respectively connected to the first plate 154 and the third plate 157. When subjected to external forces, the elastic expansion member 1593 will undergo elastic deformation, and this deformation will cause the distance between the third plate 157 and the first plate 154 to change. Specifically, in some embodiments, the distance between the third plate 157 and the first plate 154 is negatively correlated with the deformation of the elastic expansion member 1593, that is, the greater the distance between the third plate 157 and the first plate 154, the smaller the deformation of the elastic expansion member 1593 (the closer to the natural state without deformation); the smaller the distance between the third plate 157 and the first plate 154, the greater the deformation of the elastic expansion member 1593 (the more compressed). In other embodiments, the distance between the third plate 157 and the first plate 154 is positively correlated with the deformation of the elastic expansion member 1593, that is, the greater the distance between the third plate 157 and the first plate 154, the greater the deformation of the elastic expansion member 1593 (the more stretched); the smaller the distance between the third plate 157 and the first plate 154, the greater the deformation of the elastic expansion member 1593 (the closer to the natural state without deformation). Therefore, the energy storage device 100 can control the distance between the third plate 157 and the first plate 154 by adjusting the deformation of the elastic expansion member 1593.

[0128] In the above technical solution, the first connecting member 156 is an elastic elastic member 1593. When the second plate 155 moves relative to the first plate 154 and approaches or moves away from each other, the third plate 157 can compress the elastic elastic member 1593 or pull up the elastic elastic member 1593, thereby adjusting the deformation of the elastic elastic member 1593, thereby adjusting the distance between the third plate 157 and the first plate 154. At the same time, the elastic elastic member 1593 has a simple structure, low cost, and is easy to install, which makes it easier to disassemble and maintain the battery cluster 30, thereby improving the maintainability of the energy storage device 100.

[0129] See also Figure 4 , Figure 5 and Figure 8 In some embodiments, the second connecting member 158 is a hard telescopic member 1595. The hard telescopic member 1595 includes a stator 15951 and a mover 15953. One of the stator 15951 and the mover 15953 is connected to the first plate 154, and the other is connected to the third plate 157. The mover 15953 can be telescopic relative to the stator 15951, and the distance between the third plate 157 and the first plate 154 is positively correlated with the telescopic amount of the hard telescopic member 1595.

[0130] Specifically, the second connecting member 158 can be composed of a stator 15951 and a mover 15953. One of the stator 15951 and the mover 15953 is connected to the first plate 154, and the other is connected to the third plate 157. The mover 15953 can be telescopic relative to the stator 15951, thereby changing the distance between the third plate 157 and the first plate 154. Specifically, the distance between the third plate 157 and the first plate 154 is positively correlated with the telescopic amount of the hard telescopic member. That is, the greater the distance between the third plate 157 and the first plate 154, the greater the telescopic amount of the hard telescopic member 1595; the smaller the distance between the third plate 157 and the first plate 154, the smaller the telescopic amount of the hard telescopic member 1595.

[0131] In the above technical solution, the first connecting member 156 is a hard telescopic member 1595 including a stator 15951 and a mover 15953. The mover 15953 can be telescopic relative to the stator 15951 to drive the third plate 157 to approach or move away from the first plate 152, so as to actively adjust the distance between the third plate 157 and the first plate 152, with a high degree of automation, making it more convenient to disassemble and maintain the battery cluster 30, and improving the maintainability of the energy storage device 100.

[0132] Please also read Figures 4 to 6 In some embodiments, the first air outlet 1531 , the connecting hole 1597 , and the second air outlet 1533 are aligned in the first direction X.

[0133] In the above technical solution, the three spaces of the first air outlet 1531, the connecting hole 1597 and the second air outlet 1533 are aligned in the first direction X, which means that they are aligned in the same direction, and the gas flowing into the ventilation cavity 152 from the air inlet 151 can flow freely and unimpeded in the first cavity 1521 and the second cavity 1523, and the gas transmission path between them is more direct and smooth, which reduces the resistance in the gas transmission process, improves the flow efficiency of the gas from the first air outlet 1531 and the second air outlet 1533 to the battery cluster 30, and can further improve the effect of removing condensed water by the fan, so that the gas can flow more smoothly, improve the effect and efficiency of removing condensed water by air cooling, and effectively prevent the accumulation of condensed water and the impact on the operation of the energy storage device 100.

[0134] See also Figures 9 and 10 In some embodiments, the cooling unit 50 further includes a dehumidification channel 55 , which is disposed in the battery cabinet 10 , an inlet of the dehumidification channel 55 is connected to the dehumidification unit 51 , and an outlet of the dehumidification channel 55 is connected to the air inlet 151 .

[0135] Specifically, the dehumidification channel 55 is a channel provided in the battery cabinet 10 and connecting the dehumidification unit 51 and the end plate 15. The dehumidification channel 55 is used to introduce the gas generated by the dehumidification unit 51 into the ventilation cavity 152 through the air inlet 151 of the end plate 15, so that the gas flows out to the battery cluster 30. Specifically, after the dehumidification unit 51 generates gas, since the inlet of the dehumidification channel 55 is connected to the dehumidification unit 51, the gas can enter the dehumidification channel 55 from the inlet of the dehumidification channel 55. The dehumidification channel 55 transports the gas to the outlet of the dehumidification channel 55 of the battery compartment 113. The outlet of the dehumidification channel 55 is arranged opposite to the air inlet 151 of the end plate 15, so the gas is introduced into the ventilation cavity 152 through the air inlet 151. The gas in the ventilation cavity 152 flows out from the air outlet 153 of the end plate 15 to the battery cluster 30 in the accommodating cavity 1131.

[0136] In the above technical solution, the inlet of the dehumidification channel 55 is connected to the dehumidification unit 51, and the outlet of the dehumidification channel 55 is connected to the air inlet 151 of the end plate 15. The gas generated by the dehumidification unit 51 can be introduced into the air inlet 151 of the end plate 15 through the dehumidification channel 55, thereby providing a channel for removing condensed water from the cooling chamber 111 to the battery chamber 113.

[0137] See also Fig. 9 and Fig.10 The outlets of the dehumidification channel 55 include at least two. The air inlet 151 portions at the two opposite ends of the end plate 15 at least in the second direction Z correspond to an outlet of the dehumidification channel 55 respectively. The second direction Z is perpendicular to both the first direction X and the second direction Y.

[0138] Specifically, the outlet of the dehumidification channel 55 includes a first dehumidification outlet 551 and a second dehumidification outlet 553. In the third direction Z, the air inlet 1511 corresponds to the first dehumidification outlet 551, and the air inlet 1513 also corresponds to the second dehumidification outlet 553. After the dehumidification unit 51 generates gas, since the inlet of the dehumidification channel 55 is connected to the dehumidification unit 51, the gas can enter the dehumidification channel 55 from the inlet of the dehumidification channel 55. The dehumidification channel 55 transports the gas to the first dehumidification outlet 551 and the second dehumidification outlet 553. Since the first dehumidification outlet 551 and the second dehumidification outlet 553 respectively correspond to the air inlet 151 parts at the opposite ends, the gas enters the first cavity 1521 through the first air inlet 1511, and then flows out from the first air outlet 1531 to the battery cluster 30 on the first side of the end plate 15, and enters the second cavity 1523 through the second air inlet 1513, and then flows out from the second air outlet 1533 to the battery cluster 30 on the second side (opposite to the first side) of the end plate 15.

[0139] In the above technical solution, the air inlet 151 parts at the opposite ends of the end plate 15 at least in the third direction Z respectively correspond to the outlet of a dehumidification channel 55, thereby providing at least two channels for gas to flow out to the battery cluster 30, which can further improve gas circulation and enhance the effect of removing condensed water.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An energy storage device, characterized in that: The energy storage device comprises: A battery cabinet, the battery cabinet comprising a box body, a partition and an end plate, the partition being arranged in the box body and dividing the box body into a cooling chamber and a battery chamber, the end plate being arranged in the battery chamber and dividing the battery chamber into at least two accommodating chambers in a first direction, the end plate being provided with an air inlet, a ventilation chamber and an air outlet, the ventilation chamber being in communication with both the air inlet and the air outlet; at least two battery clusters, each battery cluster being an integral structure formed by integrating at least two battery cells and a cooling plate located between the battery cells, and each of the accommodating cavities containing at least one battery cluster; and A cooling unit is installed in the cooling bin, the cooling unit includes a dehumidification unit and a cooling unit, the dehumidification unit is connected with the air inlet, and is used to introduce gas into the ventilation cavity through the air inlet, the air outlet is used to allow the gas in the ventilation cavity to flow out to the battery cluster in the accommodating cavity, the cooling unit is connected with the cooling plate to form a heat dissipation channel, and the heat dissipation channel is used for circulating refrigerant to dissipate heat from the battery cells.

2. The energy storage device according to claim 1, characterized in that: At least two of the battery clusters are arranged along the first direction and supported on the bottom of the battery compartment, and the end plate abuts against the side surfaces of the battery clusters.

3. The energy storage device according to claim 1, characterized in that: The battery cells are glued to each other, and the cooling plates are glued to the battery cells to form a battery cluster with an integral structure.

4. The energy storage device according to claim 1, characterized in that: Each of the battery clusters includes at least two battery cells, each of the battery cells includes at least two battery cells, in each of the battery cells, at least two of the battery cells are arranged along the first direction and / or along the second direction, the cooling plate is arranged between two adjacent battery cells, the battery cells and the cooling plate are arranged alternately along the first direction or the second direction in sequence, and the first direction is perpendicular to the second direction.

5. The energy storage device according to claim 1, characterized in that: The end plate is provided with the air outlet at least on one side facing the battery cluster.

6. The energy storage device according to claim 1, characterized in that: The thickness of the end plate in the first direction is adjustable, so that the size of the accommodating cavity in the first direction is adjustable.

7. The energy storage device according to claim 6, characterized in that: The ventilation cavity includes a first cavity, the air inlet includes a first air inlet, the air outlet includes a first air outlet, and the first air inlet and the first air outlet are all connected to the first cavity; the end plate includes: A first plate, wherein the first plate is fixedly mounted on the battery compartment; a second plate, the second plate being movably mounted on the battery compartment, the second plate being spaced apart from the first plate and facing each other, and forming the first cavity together with the first plate, the first air inlet being located at the top and / or bottom of the first cavity, and the first air outlet being arranged on the second plate; and A first connecting member is located in the first cavity and connects the first plate body and the second plate body. The first connecting member can be extended or deformed to adjust the distance between the second plate body and the first plate body in the first direction.

8. The energy storage device according to claim 7, characterized in that: The first connecting member comprises a plurality of connecting rods, which are hinged end to end and enclose a hollow polygonal deformable structure; or The first connecting member is an elastic member, the opposite ends of which are respectively connected to the first plate body and the second plate body, and the elastic member can be elastically deformed when subjected to force; or The first connecting member is a hard telescopic member, and the hard telescopic member includes a stator and a mover. One of the stator and the mover is connected to the first plate body, and the other is connected to the second plate body. The mover can be telescopic relative to the stator.

9. The energy storage device according to claim 7, characterized in that: The ventilation cavity further includes a second cavity, the air inlet includes a second air inlet, the air outlet includes a second air outlet, and the second air inlet and the second air outlet are all connected to the second cavity; the end plate further includes: a third plate body, the third plate body being movably mounted on the battery compartment, the third plate body being spaced apart from the first plate body and opposite to each other, and forming the second cavity together with the first plate body, the second air inlet being located at the top and / or bottom of the second cavity, the second air outlet being arranged on the third plate body, the first plate body being provided with a connecting hole, the first cavity and the second cavity being connected through the connecting hole to form the ventilation cavity; and The second connecting member is located in the second cavity and connects the first plate body and the third plate body. The second connecting member can be extended or deformed to adjust the distance between the third plate body and the first plate body in the first direction.

10. The energy storage device according to claim 9, characterized in that: The second connecting member comprises a plurality of connecting rods, which are hinged end to end and enclose a hollow polygonal deformable structure; or The second connecting member is an elastic member, the opposite ends of which are respectively connected to the third plate body and the second plate body, and the elastic member can be elastically deformed when subjected to force; or The second connecting member is a hard telescopic member, and the hard telescopic member includes a stator and a mover, one of the stator and the mover is connected to the first plate body, and the other is connected to the third plate body, and the mover can be telescopic relative to the stator.

11. The energy storage device according to claim 9, characterized in that: The first air outlet, the communicating hole and the second air outlet are aligned in the first direction.

12. The energy storage device according to claim 1, characterized in that: The cooling unit also includes: A dehumidification channel is provided in the battery cabinet, an inlet of the dehumidification channel is communicated with the dehumidification unit, and an outlet of the dehumidification channel is communicated with the air inlet.

13. The energy storage device according to claim 12, characterized in that: The dehumidification channel has at least two outlets, and the air inlet portions at opposite ends of the end plate at least in a third direction respectively correspond to one outlet of the dehumidification channel, and the third direction is perpendicular to the first direction.

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