Energy storage shell, energy storage device and energy storage system

Abstract

The utility model discloses an energy storage shell, an energy storage device and an energy storage system. The energy storage shell is provided with a containing cavity, a first opening and a second opening, the containing cavity is used for containing a module to be cooled, and the first opening and the second opening are both communicated with the containing cavity to form a first channel. An interlayer is arranged at the bottom of the energy storage shell and provided with a containing cavity, a first connector and a second connector, and the containing cavity communicates with the first connector and the second connector to form a second channel. And the first passage and the second passage are used for jointly forming a cooling circulation loop for circulation of a cooling medium.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly relates to an energy storage housing, an energy storage device, and an energy storage system. Background Art

[0002] In recent years, with the accelerated development of the new energy industry, energy storage devices have been more and more widely promoted and applied. Generally, an energy storage device includes an energy storage housing and a module to be cooled accommodated inside the energy storage housing. To ensure the stable operation of the energy storage device, a cooling medium is usually transported into the energy storage housing to cool the module to be cooled, such as cooling and dissipating heat from a battery module and a control module.

[0003] Currently, pipelines are usually arranged outside the energy storage housing, and the cooling medium is transported through the pipelines into the energy storage housing to form a cooling circulation loop. However, the pipelines do not directly contact the module to be cooled. Before the cooling medium in the pipelines enters the energy storage housing, it directly transfers heat to the surrounding air, resulting in energy dissipation, so that the cooling energy of the cooling medium in the pipelines cannot be fully absorbed by the module to be cooled, resulting in poor heat dissipation efficiency of the module to be cooled (such as a battery module and a control module) inside the energy storage housing. Summary of the Invention

[0004] The present application provides an energy storage housing, an energy storage device, and an energy storage system.

[0005] In a first aspect, an embodiment of the present application provides an energy storage housing. The energy storage housing is provided with a receiving cavity, a first opening, and a second opening. The receiving cavity is used to accommodate the module to be cooled. The first opening and the second opening are both communicated with the receiving cavity to form a first passage. A sandwich layer is provided at the bottom of the energy storage housing. The sandwich layer is provided with a receiving cavity, a first interface, and a second interface. The receiving cavity is communicated with the first interface and the second interface to form a second passage. The first passage and the second passage are used to jointly form a cooling circulation loop for the cooling medium to flow through.

[0006] In some embodiments, the sandwich layer includes a bottom wall, a top wall, and a side wall connecting the bottom wall and the top wall. The receiving cavity is surrounded by the bottom wall, the top wall, and the side wall.

[0007] In some embodiments, the sandwich layer includes a bottom wall, a top wall, a side wall connecting the bottom wall and the top wall, and a blocking member disposed in the receiving cavity. The receiving cavity is surrounded by the bottom wall, the top wall, the side wall, and the blocking member.

[0008] In some embodiments, the blocking member is located on the flow path of the cooling medium flowing from the first interface towards the second interface, and is spaced from both the first interface and the second interface.

[0009] In certain embodiments, the blocking member includes at least one of a columnar structure, a block structure, a sheet structure, a plate structure, and a maze structure.

[0010] In some embodiments, the first interface and the first opening are both located on a first side of the energy storage housing, the second interface and the second opening are both located on a second side of the energy storage housing, and the first side of the energy storage housing is opposite to the second side of the energy storage housing.

[0011] In a second aspect, an embodiment of the present application provides an energy storage device, which includes the energy storage housing and a module to be cooled described in any one of the above embodiments, wherein the module to be cooled is accommodated in the accommodating cavity.

[0012] In some embodiments, the energy storage device further includes a first branch pipe, a second branch pipe and a connecting pipe, wherein the first branch pipe is connected to the outside of the energy storage shell and is connected to the first interface; the second branch pipe is connected to the outside of the energy storage shell and is connected to the first opening; the connecting pipe is connected to the outside of the energy storage shell, and the second interface is connected to the second opening through the connecting pipe.

[0013] In some embodiments, the second interfaces include at least two, the connecting tubes include at least two, the second openings include at least two, at least two connecting tubes correspond to at least two second interfaces and at least two second openings, respectively, and the connecting tubes are connected to the corresponding second interfaces and the corresponding second openings, respectively.

[0014] In some embodiments, the energy storage shells include at least two, the modules to be cooled include at least two, at least two modules to be cooled are respectively accommodated in at least two of the energy storage shells, and at least two of the energy storage shells are stacked. The energy storage device also includes a first main pipe and a second main pipe, one of the first main pipe and the second main pipe is used for the cooling medium to flow in, and the other is used for the cooling medium to flow out, the first interface is connected to the first main pipe through a first branch pipe, the first opening is connected to the second main pipe through a second branch pipe, and the second interface is connected to the second opening through a connecting pipe to form the cooling circulation loop.

[0015] In certain embodiments, the first main pipe or the second main pipe is provided with an input main port for the cooling medium to flow in, and a conveying distance between the first interface and the input main port is negatively correlated with the volume of the accommodating chamber.

[0016] In certain embodiments, the blocking member in the interlayer is a protrusion, and along the direction of the first main pipe or the second main pipe away from the input main port, the volume of the protrusion in the plurality of interlayers gradually increases.

[0017] In some embodiments, the first main pipe is provided with an input main port for the cooling medium to flow in, the second main pipe is provided with an output main port for the cooling medium to flow out, the first branch pipe is configured to input the cooling medium in the first main pipe into the accommodation cavity through the first interface, the connecting pipe is configured to input the cooling medium output from the second interface into the accommodation cavity through the second opening, the second branch pipe is configured to input the cooling medium output from the first opening into the second main pipe, and the cooling medium in the cooling circulation loop flows along a first circulation direction.

[0018] In some embodiments, the second main pipe is provided with an input main port for the cooling medium to flow in, the first main pipe is provided with an output main port for the cooling medium to flow out, the second branch pipe is configured to input the cooling medium in the second main pipe into the accommodation cavity through the first opening, the connecting pipe is configured to input the cooling medium output from the second opening into the accommodation cavity through the second interface, the first branch pipe is configured to input the cooling medium output from the first interface into the first main pipe, the cooling medium in the cooling circulation loop flows along a second circulation direction, and the first circulation direction is opposite to the second circulation direction.

[0019] In some embodiments, when the cooling medium in the cooling circulation loop circulates along the first circulation direction, the flow area of the first interface and / or the flow area of the second opening gradually increases in the first circulation direction; when the cooling medium in the cooling circulation loop flows along the second circulation direction, the flow area of the second interface and / or the flow area of the first opening gradually increases in the second circulation direction.

[0020] In some embodiments, there are at least two energy storage housings, and there are at least two to-be-cooled modules. At least two of the to-be-cooled modules are respectively accommodated in at least two of the energy storage housings; the to-be-cooled modules in at least two of the energy storage housings are battery modules, and the to-be-cooled module in one of the energy storage housings is a control module. At least two of the energy storage devices having the battery modules are stacked, and the energy storage device having the control module is disposed on the top of the energy storage device having the battery module at the uppermost layer.

[0021] In some embodiments, there are at least two first interfaces, and there are at least two first branch pipes. At least two of the first branch pipes correspond to at least two of the first interfaces respectively, and the first branch pipes are respectively connected to the first main pipe and the corresponding first interface.

[0022] In some embodiments, there are at least two of the first openings, and at least two of the second branch pipes. The at least two second branch pipes respectively correspond to the at least two first openings, and the second branch pipes respectively communicate the second main pipe with the corresponding first openings.

[0023] In some embodiments, the module to be cooled includes a battery module and a control module.

[0024] In a third aspect, embodiments of the present application provide an energy storage system, which includes the energy storage device according to any one of the above embodiments.

[0025] In the energy storage housing, energy storage device and energy storage system of the present application, the accommodation cavity of the energy storage housing communicates with the first opening and the second opening to form a first passage. The interlayer communicates with the first interface and the second interface through the accommodation cavity to form a second passage. The first passage communicates with the second passage to form a cooling circulation loop for the cooling medium to flow through. The cooling medium can circulate in the cooling circulation loop to dissipate heat from the module to be cooled in the accommodation cavity. Since the interlayer is provided at the bottom of the energy storage housing, that is, the interlayer is provided inside the energy storage housing, the interlayer will not have excessive heat transfer with the surrounding air. That is, the cooling energy of the cooling medium in the interlayer can be fully absorbed by the module to be cooled, thereby improving the heat dissipation efficiency of the module to be cooled in the accommodation cavity.

[0026] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0028] Figure 1 is a perspective structural view of an energy storage device according to some embodiments of the present application;

[0029] Figure 2 is Figure 1 the front view of the energy storage device shown;

[0030] Figure 3 is Figure 1 the rear view of the energy storage device shown;

[0031] Figure 4 is Figure 1 the sectional view of the energy storage device shown;

[0032] Figure 5 is Figure 1 the structural view of a part of the energy storage device shown;

[0033] Figure 6 is Figure 1 a schematic structural view of a partial structure of the energy storage device shown;

[0034] Figure 7 is a schematic plan view of an energy storage device according to another embodiment of the present application;

[0035] Figure 8 is a schematic plan view of a partial structure of an energy storage device;

[0036] Figure 9 is a schematic perspective view of a partial structure of another energy storage device;

[0037] Figure 10 is a schematic structural view of an energy storage system according to some embodiments of the present application.

[0038] Description of main element numbers:

[0039] Energy storage system 100;

[0040] Energy storage device 10, energy storage housing 11, accommodation cavity 111, first opening 113, second opening 115, sandwich layer 116, receiving cavity 117, first interface 118, second interface 119, bottom wall 1161, top wall 1163, side wall 1165, plugging member 1167, module to be cooled 13, battery module 131, battery cell 1311, control module 133, first main pipe 31, second main pipe 32, input main port 301, output main port 303, first branch pipe 33, second branch pipe 34, connecting pipe 35, energy storage cabinet 30. Detailed implementation manners

[0041] In the description of the present application, some of the disclosed content has been correspondingly shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The content described below with reference to the drawings is exemplary and is only used to explain the present application and should not be construed as a limitation to the present application.

[0042] In the description of the present application, many different contents or examples are disclosed to implement different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0044] In the description of the present application, it should be understood that the terms used to indicate orientation or positional relationship (such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc.) are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and facilitating the understanding of the corresponding embodiments, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to indicate orientation or positional relationship should not be construed as a limitation to the present application.

[0045] In the description of the present application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0046] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0047] Please refer to Figures 1 to 3 , the energy storage device 10 of the embodiment of the present application includes an energy storage housing 11 and a module to be cooled 13. The energy storage housing 11 is provided with a receiving cavity 111, a first opening 113 and a second opening 115. The receiving cavity 111 is used to accommodate the module to be cooled 13. Both the first opening 113 and the second opening 115 communicate with the receiving cavity 111 to form a first passage. A sandwich layer 116 is provided at the bottom of the energy storage housing 11. The sandwich layer 116 is provided with a receiving cavity 117, a first interface 118 and a second interface 119. The receiving cavity 117 communicates with both the first interface 118 and the second interface 119 to form a second passage. The first passage and the second passage are used to jointly form a cooling circulation loop for the cooling medium to flow through.

[0048] Taking the length, width, and height of the energy storage device 10 as the three axes to establish a rectangular coordinate system, for example, the first direction X is the length direction of the energy storage device 10, the second direction Y is the width direction of the energy storage device 10, and the third direction Z is the height direction of the energy storage device 10, as follows Figure 1 shown.

[0049] Specifically, when the module 13 to be cooled operates, it generates heat. The module 13 to be cooled includes a battery module 131 and a control module 133. For example, the battery module 131 generates heat during charging and / or discharging, and the control module 133 also generates heat during the process of controlling the charging and / or discharging of the battery module 131. The accumulation of heat will cause the temperature of the module 13 to be cooled to rise, which will in turn affect the working performance and service life of the module 13 to be cooled. Therefore, the energy storage device 10 needs to cool the module 13 to be cooled. Conventionally, the energy storage device usually sets pipes outside the energy storage housing to transport the cooling medium into the accommodating cavity of the energy storage housing. After the cooling medium in the accommodating cavity absorbs the heat of the module 13 to be cooled immersed therein, it flows out of the accommodating cavity and takes away the heat, thereby cooling the module 13 to be cooled.

[0050] In the energy storage housing 11 of the present application, a sandwich layer 116 is provided at the bottom of the energy storage housing 11, that is, the energy storage housing 11 includes a bottom and an upper part above the bottom, and the sandwich layer 116 is provided at the bottom. In some embodiments, the upper part and the sandwich layer 116 are an integral structure, that is, the upper part and the sandwich layer 116 are a whole structure, thereby being able to improve the overall strength of the energy storage housing 11 and ensure the stability and reliability of the operation of the energy storage device 11. In other embodiments, the upper part and the sandwich layer 116 are a split structure, that is, the upper part and the sandwich layer 116 are two different structures. In one example, the upper part and the sandwich layer 116 can be combined together by a detachable connection method to form the energy storage housing 11, and the detachable connection method includes but is not limited to snap connection or threaded connection, etc. In another example, the upper part and the sandwich layer 116 can be combined together by a non-detachable connection method to form the energy storage housing 11, and the non-detachable connection method includes but is not limited to bonding or welding, etc.

[0051] In the present application, the upper part and the sandwich layer 116 are an integral structure, that is, the sandwich layer 116 is provided inside the energy storage housing 11 and is a part of the energy storage housing 11. The energy storage housing 11 can divide the interior of the energy storage housing 11 into an accommodating cavity 111 and a receiving cavity 117 by setting a partition. The part of the energy storage housing 11 that surrounds and forms the receiving cavity 117 is the sandwich layer 116. The accommodating cavity 111 is used to accommodate the module 13 to be cooled.

[0052] On the one hand, the interlayer 116 serves as one of the transmission channels for the cooling medium, and is used to transmit the cooling medium into the accommodation cavity 111 to cool the module 13 to be cooled in the accommodation cavity 111. On the other hand, during the process of transporting the cooling medium to the accommodation cavity 111, the interlayer 116 can serve as a device for initially dissipating heat from the module 13 to be cooled, that is, the cooling medium in the accommodation cavity 117 can also cool the module 13 to be cooled.

[0053] The cooling cycle loop further includes a cooling unit (not shown), and the cooling cycle loop transfers the cooling medium in the cooling unit to the energy storage device 10. The cooling unit is a component that uses the cooling medium to cool the module 13 to be cooled, and the cooling unit may include a compressor, an evaporator, a condenser, valves, pipelines, a liquid storage dryer, etc. Specifically, after the cooling medium with a lower temperature in the cooling unit enters the cooling cycle loop and absorbs the heat generated by the module 13 to be cooled, its temperature becomes higher, while the cooling medium with a higher temperature returns to the cooling unit from the cooling cycle loop and becomes a cooling medium with a lower temperature again after being processed by the cooling unit. The cooling medium with a lower temperature can return to the cooling cycle loop again to dissipate heat from the module 13 to be cooled in a cycle. It should be noted that in this application, since the cooling medium dissipates heat from the module 13 to be cooled in an immersion manner, the cooling medium needs to have the following characteristics: good electrical insulation, non-flammable and with a high flash point, an appropriate working temperature range, a long service life, good material compatibility, low weight, low viscosity, low corrosiveness, and sustainability. The cooling medium can be a coolant, a cooling gas, or a mixture of a coolant and a cooling gas. For example, the cooling medium includes, but is not limited to, hydrofluoroether, silicone oil, water (electrical isolation needs to be achieved by using a silicone sealant or boron nitride), helium, nitrogen, or hydrocarbons, etc.

[0054] In the energy storage housing 11 of this application, the accommodation cavity 111 communicates with the first opening 113 and the second opening 115 to form a first passage, and the interlayer 116 communicates with the first interface 118 and the second interface 119 through the accommodation cavity 117 to form a second passage. The first passage communicates with the second passage to form a cooling cycle loop for the cooling medium to flow through. The cooling medium can circulate in the cooling cycle loop to dissipate heat from the module 13 to be cooled in the accommodation cavity 111. Since the interlayer 116 is provided at the bottom of the energy storage housing 11, that is, the interlayer 116 is provided inside the energy storage housing 11, the interlayer 116 will not transfer heat to the surrounding air too much. That is, the cooling energy of the cooling medium in the interlayer 116 can be fully absorbed by the module 13 to be cooled, thereby improving the heat dissipation efficiency of the module 13 to be cooled in the accommodation cavity 111.

[0055] In addition, the cooling circulation loop formed by the first passage and the second passage provides two levels of cooling effects for the module 13 to be cooled. On the one hand, the first passage allows the cooling medium to enter the accommodation cavity 111 of the module 13 to be cooled, and directly exchange heat with the module 13 to be cooled inside the accommodation cavity 111, thereby cooling the module 13 to be cooled. On the other hand, before or after the cooling medium is transported into the accommodation cavity 111, the interlayer 116, which is part of the cooling circulation loop, is provided below the accommodation cavity 111, allowing the cooling medium to exchange heat with the accommodation cavity 111, further cooling the module 13 to be cooled. Therefore, during the circulation of the cooling medium, the energy storage housing 11 of the present application enables the module 13 to be cooled to absorb the cooling energy of the cooling medium in the accommodation cavity 111 and the accommodation cavity 117, thereby improving the heat dissipation efficiency of the module 13 to be cooled.

[0056] Please refer to Figure 2 and Figure 5 , in some embodiments, the interlayer 116 includes a bottom wall 1161, a top wall 1163, and side walls 1165 connecting the bottom wall 1161 and the top wall 1163. The accommodation cavity 117 is surrounded by the bottom wall 1161, the top wall 1163, and the side walls 1165.

[0057] Specifically, the bottom wall 1161 of the interlayer 116 is the bottom wall of the energy storage housing 11, and the top wall 1163 can be the aforementioned partition plate, which can contact the module 13 to be cooled to cool the module 13 to be cooled. The side walls 1165 are part of the side walls of the energy storage housing 11. The side walls 1165 can be one or more, depending on the structural shape of the interlayer 116. When the interlayer 116 is a cylindrical structure, the side wall 1165 is one; when the interlayer 116 is a quadrangular prism structure, the side walls 1165 are four; when the interlayer 116 is a triangular prism structure, the side walls 1165 are three, and so on, which will not be listed one by one here. In the embodiments of the present application, the interlayer 116 is a quadrangular prism structure and includes four side walls 1165. In some examples, the shape of the interlayer 116 is the same as the shape of the module 13 to be cooled, and the sizes of the bottom wall 1161 and the top wall 1163 of the interlayer 116 are respectively the same as the sizes of the bottom and the top of the module 13 to be cooled. In this way, the cooling medium can exchange heat with all positions of the top and the bottom of the module 13 to be cooled, further improving the heat dissipation efficiency.

[0058] In some other embodiments, please refer to 2, Figure 3 and Figure 9, the interlayer 116 includes a bottom wall 1161, a top wall 1163, a side wall 1165 connecting the bottom wall 1161 and the top wall 1163, and a plugging member 1167 disposed in the accommodation cavity 117. The accommodation cavity 117 is surrounded by the bottom wall 1161, the top wall 1163, the side wall 1165 and the plugging member 1167. When the sizes of the bottom wall 1161, the top wall 1163 and the side wall 1165 of each interlayer 116 are the same, the conveying distance between the first interface 118 and the input main port 301 can be made negatively correlated with the volume of the interlayer 116 by designing the plugging member 1167, such as Figure 9 shown.

[0059] Specifically, the plugging member 1167 is an element with a certain volume and is used to adjust the volume of the accommodation cavity 117. Since the sizes of the bottom wall 1161, the top wall 1163 and the side wall 1165 of each interlayer 116 are the same, the volumes of the spaces surrounded by the bottom wall 1161, the top wall 1163 and the side wall 1165 of each interlayer 116 are the same. Therefore, increasing the volume of the plugging member 1167 can make the plugging member 1167 occupy more space, thereby reducing the volume of the accommodation cavity 111. The plugging member 1167 can be disposed at least at one of the bottom wall 1161 of the interlayer 116, the top wall 1163 of the interlayer 116 and the side wall 1165 of the interlayer 116, and there is no limitation here. The plugging member 1167 can be fixed to at least one of the bottom wall 1161, the top wall 1163 and the side wall 1165 by non-detachable means such as gluing connection, hot melt connection or interference connection, or can also be fixed to at least one of the bottom wall 1161, the top wall 1163 and the side wall 1165 by detachable means such as snap connection, screw connection or bolt connection, and there is no limitation here.

[0060] Please refer to 2, Figure 4 and Figure 9 , in some embodiments, the plugging member 1167 is located on the flow path of the cooling medium flowing from the first interface 118 towards the second interface 119 and is spaced from both the first interface 118 and the second interface 119.

[0061] Specifically, when the cooling medium flows along the first circulation direction, the flow path of the cooling medium in the accommodation cavity 117 of the interlayer 116 is: from the first interface 118 to the second interface 119. The blocking member 1167 provided on the flow path can guide the flow direction of the cooling medium entering the accommodation cavity 117, so that the cooling medium can be transported in the accommodation cavity 117 in a diffusion potential after entering the accommodation cavity 117 from the first interface 118, increasing the projected area of the flow path of the cooling medium in the XY plane, which is beneficial to large-area heat exchange with the energy storage housing 11. The projection of the blocking member 1167 in the XY plane does not coincide with the projections of the first interface 118 and the second interface 119 in the XY plane, so that the blocking member 1167 does not block the cooling medium at the first interface 118 and the second interface 119, ensuring the smooth flow of the cooling medium in the accommodation cavity 117.

[0062] Similarly, when the cooling medium flows along the second circulation direction, the flow path of the cooling medium in the accommodation cavity 117 of the interlayer 116 is: from the second interface 119 to the first interface 118. The blocking member 1167 provided on the flow path can guide the flow direction of the cooling medium entering the accommodation cavity 117, so that the cooling medium can be transported in the accommodation cavity 117 in a diffusion potential after entering the accommodation cavity 117 from the second interface 119, increasing the projected area of the flow path of the cooling medium in the XY plane, which is beneficial to large-area heat exchange with the energy storage housing 11. The projection of the blocking member 1167 in the XY plane does not coincide with the projections of the first interface 118 and the second interface 119 in the XY plane, so that the blocking member 1167 does not block the cooling medium at the first interface 118 and the second interface 119, ensuring the smooth flow of the cooling medium in the accommodation cavity 117.

[0063] Please refer to Figure 9 , in some embodiments, the blocking member 1167 includes at least one of a columnar structure, a block structure, a sheet structure, a plate structure, and a labyrinth structure.

[0064] Specifically, the blocking member 1167 can have various forms in the accommodation cavity 117. In the embodiments of the present application, the blocking member 1167 is a quadrilateral plate structure. In other embodiments of the present application, the blocking member 1167 can be a columnar structure distributed in an array form, or other forms of structures, or a combination of multiple structures. On the premise of meeting the volume requirements of the accommodation cavity 117, the blocking member 1167 can be set in various structures according to process requirements.

[0065] Please refer to Figure 2 and Figure 3, in some embodiments, both the first interface 118 and the first opening 113 are located on the first side of the energy storage housing 11. Both the second interface 119 and the second opening 115 are located on the second side of the energy storage housing 11. The first side of the energy storage housing 11 is opposite to the second side of the energy storage housing 11.

[0066] Specifically, the opposite first side and second side of the energy storage housing 11 can be the two opposite sides in the first direction X, or the two opposite sides in the second direction Y. In this embodiment, the first side and the second side are the two opposite sides of the energy storage housing 11 in the second direction Y, that is, the width direction of the module to be cooled 13.

[0067] The first interface 118 and the second interface 119 are respectively located on the first side and the second side of the energy storage housing 11, which can increase the flow path of the cooling medium in the interlayer 116, so that the cooling medium can fully exchange heat with the energy storage housing 11, improving the heat dissipation efficiency. The first opening 113 and the second opening 115 are respectively located on the first side and the second side of the energy storage housing 11, which can increase the flow path of the cooling medium in the module to be cooled 13, so that the cooling medium can fully exchange heat with the module to be cooled 13, improving the heat dissipation efficiency.

[0068] Please refer to Figure 3 and Figure 7 , in some embodiments, the second interface 119 includes at least two. The connecting pipes 35 include at least two. The second opening 115 includes at least two. At least two connecting pipes 35 correspond to at least two second interfaces 119 and at least two second openings 115 respectively. The connecting pipes 35 respectively connect the corresponding second interfaces 119 and the corresponding second openings 115.

[0069] Specifically, in the embodiments of the present application, there are two second interfaces 119 and two connecting pipes 35 respectively, thus constructing two conveying paths for the cooling medium. When the cooling medium flows in the first circulation direction, the conveying path is the path for the cooling medium to output from the second interface 119 along the connecting pipe 35 into the module 13 to be cooled; when the cooling medium flows in the second circulation direction, the conveying path is the path for the cooling medium to input into the second interface 119 along the connecting pipe 35. In other embodiments of the present application, the second interface 119 and the connecting pipe 35 may be two, three, four, five or more. The two conveying paths can increase the flow rate of the cooling medium per unit time and improve the heat exchange efficiency. The two conveying paths can also provide redundancy and backup. When a failure occurs in the second interface 119 or the connecting pipe 35 in any one of the conveying paths, resulting in the inability to convey the cooling medium, it can be ensured that there is still one conveying path in the first circulation direction to output the cooling medium in the interlayer 116 from the second interface 119 to the connecting pipe 35, ensuring that the cooling medium can be output from the interlayer 116 in time, and avoiding damage to the interlayer 116 due to excessive pressure caused by too much cooling medium in the accommodation cavity 117. The two conveying paths can also ensure that there is still one conveying path in the second circulation direction to input the cooling medium from the module 13 to be cooled into the interlayer 116, ensuring that the cooling medium can be input into the interlayer 116 in time, thereby cooling the energy storage housing 11.

[0070] Please refer to Figures 1 to 3 , in some embodiments, the module 13 to be cooled includes a battery module 131 and a control module 133.

[0071] In some embodiments, the module 13 to be cooled is a battery module 131. The battery module 131 is an aggregate composed of multiple battery cells 1311 for energy storage. The battery cell 1311 is the smallest unit for storing and releasing electrical energy. The battery module 131 can store and release energy by connecting and controlling the battery cells 1311. In the battery module 131, there are multiple battery cells 1311, and the multiple battery cells 1311 can be connected in series, in parallel or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the multiple battery cells 1311. The multiple battery cells 1311 can be directly connected in series, in parallel or in a hybrid connection together, and then the battery module 131 composed of the multiple battery cells 1311 is accommodated in the accommodation cavity 111. The battery module 131 may further include other structures. For example, the battery module 131 may further include a busbar component (not shown in the figure) for realizing the electrical connection among the multiple battery cells 1311. It can be understood that the number of battery cells 1311 in the battery module 131 can be adaptively adjusted according to the application scenario.

[0072] In some other embodiments, the module 13 to be cooled is the control module 133. The control module 133 can obtain information of the battery cells 1311 and manage the operation of the battery cells 1311 based on this information. The control module 133 is electrically connected to the battery module 131 through a power line. Specifically, the control module 133 is electrically connected to the battery module 131 through a power line. Of course, the module 13 to be cooled may also include both the battery module 131 and the control module 133. In this case, the module 13 to be cooled includes the battery cells 1311 loaded in the battery module 131 and the control module 133.

[0073] Please refer to Figure 2 、 Figures 3 to 6 and, in some embodiments, the energy storage device 10 further includes a first branch pipe 33, a second branch pipe 34 and a connecting pipe 35. The first branch pipe 33 is connected outside the energy storage housing 11 and communicates with the first interface 118. The second branch pipe 34 is connected outside the energy storage housing 11 and communicates with the first opening 113. The connecting pipe 35 is connected outside the energy storage housing 11, and the second interface 119 communicates with the second opening 115 through the connecting pipe 35.

[0074] Specifically, the first branch pipe 33 and the second branch pipe 34 can enable the energy storage device 10 to communicate with the outside (such as the first main pipe 31 and the second main pipe 32). The connecting pipe 35 is used to connect the accommodation cavity 111 and the receiving cavity 117 so that the cooling medium can flow between the accommodation cavity 111 and the receiving cavity 117.

[0075] Please refer to Figure 2 、 Figures 3 to 6 and, in some embodiments, the energy storage device 10 further includes a first main pipe 31 and a second main pipe 32. One of the first main pipe 31 and the second main pipe 32 is used for the cooling medium to flow in, and the other is used for the cooling medium to flow out. The first interface 118 communicates with the first main pipe 31 through the first branch pipe 33, the first opening 113 communicates with the second main pipe 32 through the second branch pipe 34, and the second interface 119 communicates with the second opening 115 through the connecting pipe 35 to form a cooling circulation loop. Among them, the first main pipe 31 is provided with an input total port 301 for the cooling medium to flow in, and the second main pipe 32 is provided with an output total port 303 for the cooling medium to flow out.

[0076] Specifically, the first branch pipe 33 is used to input the cooling medium in the first main pipe 31 into the receiving cavity 117 through the first interface 118. The connecting pipe 35 is used to input the cooling medium output from the second interface 119 into the accommodation cavity 111 through the second opening 115. The second branch pipe 34 is used to input the cooling medium output from the first opening 113 into the second main pipe 32. At this time, the cooling medium in the cooling circulation loop flows along the first circulation direction.

[0077] The process of the cooling medium flowing in the first circulation direction is as follows: The cooling medium at a relatively low temperature in the cooling unit enters the first main pipe 31 from the input total port 301, then enters the first branch pipe 33. After passing through the first branch pipe 33, it enters the accommodation cavity 117 of the interlayer 116 from the first interface 118, and then is output to the connecting pipe 35 from the second interface 119 of the interlayer 116. It enters the accommodation cavity 111 of the module 13 to be cooled through the second opening 115 by the connecting pipe 35. The cooling medium is in direct contact with the module 13 to be cooled provided in the accommodation cavity 111. After the cooling medium absorbs the heat of the module 13 to be cooled, its temperature becomes higher, and it flows out from the first opening 113 to the second main pipe 32, and is output from the output total port 303 of the second main pipe 32 and re-enters the cooling unit. The cooling unit processes the cooling medium at a higher temperature into a cooling medium at a relatively low temperature, and the cooling medium at a relatively low temperature enters the first main pipe 31 from the input total port 301 again and circulates in the first circulation direction.

[0078] For a combination of a module 13 to be cooled and the interlayer 116 at the bottom of the energy storage housing 11, in the third direction Z, the cooling medium flowing in the first circulation direction first enters the interlayer 116 at the bottom of the energy storage housing 11, and then flows out from the second interface 119 to the connecting pipe 35, enters the module 13 to be cooled from the second opening 115 and then flows out from the first opening 113. Therefore, for such a combination, in the first circulation direction, the flow path distance of the cooling medium is twice the length of the module 13 to be cooled in the second direction Y, that is, the cooling medium flows through the module 13 to be cooled twice. The lengthening of the flow path is beneficial to the full heat exchange between the cooling medium and the module 13 to be cooled, and improves the heat dissipation efficiency of the cooling module 30.

[0079] Please refer to Figure 2 and Figure 3 , in some embodiments, when the cooling medium in the cooling circulation loop flows in the first circulation direction, the flow area of the first interface 118 gradually increases in the first circulation direction.

[0080] Specifically, the "flow-through area of the first interface 118" refers to the area of the cross-section obtained by intercepting the first interface 118 with the YZ plane. The flow-through area of the first interface 118 near the first main pipe 31 is smaller than the flow-through area of the first interface 118 near the accommodation cavity 117, and the flow-through area of the first interface 118 gradually increases in the first circulation direction. Along the first circulation direction, the cross-section obtained by intercepting the first interface 118 with the XY plane can be a gradually expanding trapezoid. The first interface 118 is designed such that the flow-through area gradually increases in the first circulation direction, which can reduce the resistance of the cooling medium entering the accommodation cavity 117, increase the flow rate of the cooling medium when entering the accommodation cavity 117, shorten the time for the cooling medium to enter the interlayer 116, promote the circulation of the cooling medium in the accommodation cavity 117, so as to quickly and timely take away the heat of the interlayer 116, thereby improving the heat dissipation efficiency of the interlayer 116.

[0081] Please continue to refer to Figure 2 and Figure 3 , in some other embodiments, when the cooling medium in the cooling circulation loop flows in the first circulation direction, the flow-through area of the second opening 115 gradually increases in the first circulation direction.

[0082] Specifically, the "flow-through area of the second opening 115" refers to the area of the cross-section obtained by intercepting the second opening 115 with the YZ plane. The flow-through area of the second opening 115 near the accommodation cavity 117 is larger than the flow-through area of the second opening 115 near the communication pipe 35, and the flow-through area of the second opening 115 gradually increases in the first circulation direction. Along the first circulation direction, the cross-section obtained by intercepting the second opening 115 with the XY plane can be a gradually expanding trapezoid. The second opening 115 is designed such that the flow-through area gradually increases in the first circulation direction, which can reduce the resistance of the cooling medium entering the accommodation chamber 111, increase the flow rate of the cooling medium when entering the accommodation chamber 111, shorten the time for the cooling medium to enter the accommodation chamber 111, promote the circulation of the cooling medium in the accommodation chamber 111, so as to quickly and timely take away the heat of the module 13 to be cooled in the accommodation chamber 111, thereby improving the heat dissipation efficiency of dissipating heat from the module 13 to be cooled.

[0083] Please continue to refer to Figure 2 and Figure 3, in some other embodiments, when the cooling medium in the cooling circulation loop flows along the first circulation direction, the flow-through areas of the first interface 118 and the second opening 115 both gradually increase in the first circulation direction. For the explanations here, please refer to the foregoing text and will not be elaborated herein. Since the flow-through areas of the first interface 118 and the second opening 115 both gradually increase in the first circulation direction, on the one hand, the resistance for the cooling medium to enter the accommodation chamber 117 can be reduced, the flow velocity of the cooling medium when entering the accommodation chamber 117 can be increased, the time for the cooling medium to enter the interlayer 116 can be shortened, the circulation of the cooling medium in the accommodation chamber 117 can be promoted, so as to quickly and timely take away the heat of the interlayer 116, thereby improving the heat dissipation efficiency of the interlayer 116; on the other hand, the resistance for the cooling medium to enter the accommodation cavity 111 can also be reduced, the flow velocity of the cooling medium when entering the accommodation cavity 111 can be increased, the time for the cooling medium to enter the accommodation cavity 111 can be shortened, the circulation of the cooling medium in the accommodation cavity 111 can be promoted, so as to quickly and timely take away the heat of the module 13 to be cooled in the accommodation cavity 111, thereby improving the heat dissipation efficiency for cooling the module 13 to be cooled.

[0084] Please refer to Figure 7 , in other embodiments, the first main pipe 31 is not the input main pipe as Figure 2 shown, and the second main pipe 32 is not Figure 2 shown as the output main pipe either. On the contrary, the first main pipe 31 is the output main pipe, and the second main pipe 32 is the input main pipe. Specifically, the second main pipe 32 is provided with an input main port 301 for the cooling medium to flow in, and the first main pipe 31 is provided with an output main port 303 for the cooling medium to flow out.

[0085] Specifically, the second branch pipe 34 is used to input the cooling medium in the second main pipe 32 into the accommodation cavity 111 through the first opening 113. The connecting pipe 35 is used to input the cooling medium output from the second opening 115 into the accommodation chamber 117 through the second interface 119. The first branch pipe 33 is used to input the cooling medium output from the first interface 118 into the first main pipe 31. At this time, the cooling medium in the cooling circulation loop flows along the second circulation direction. The first circulation direction is opposite to the second circulation direction.

[0086] The process of the cooling medium flowing along the second circulation direction is as follows: The cooling medium at a relatively low temperature in the cooling unit enters the second main pipe 32 from the input total port 301, then enters the second branch pipe 34. After passing through the second branch pipe 34, it enters the accommodating cavity 111 from the first opening 113. The cooling medium is in direct contact with the module 13 to be cooled disposed in the accommodating cavity 111. After the cooling medium absorbs the heat of the module 13 to be cooled, its temperature rises. Then it is output from the second opening 115 to the connecting pipe 35, enters the accommodating cavity 117 from the second interface 119 after passing through the connecting pipe 35, and is then output from the first interface 118 of the interlayer 116 to the first main pipe 31. It is output from the output total port 303 of the first main pipe 31 and re-enters the cooling unit. The cooling unit processes the cooling medium at a relatively high temperature into a cooling medium at a relatively low temperature, and the cooling medium at a relatively low temperature enters the second main pipe 32 from the input total port 301 again and circulates along the second circulation direction.

[0087] When the temperature of the module 13 to be cooled is too high and needs to be cooled in time, after flowing out of the cooling unit, the cooling medium along the second circulation direction can directly enter the accommodating cavity 111 only after passing through the second main pipe 32 and the second branch pipe 34, come into contact with the module 13 to be cooled in time and cool the module 13 to be cooled, reducing the safety accident caused by the too high temperature of the module 13 to be cooled.

[0088] Please continue to refer to Figure 7 , in some embodiments, when the cooling medium in the cooling circulation loop flows along the second circulation direction, the flow-through area of the first opening 113 gradually increases in the second circulation direction.

[0089] Specifically, the "flow-through area of the first opening 113" refers to the area of the cross-section obtained by intercepting the first opening 113 with the XZ plane. The flow-through area of the first opening 113 near the second main pipe 32 is smaller than the flow-through area of the first opening 113 near the accommodating cavity 111, and the flow-through area of the first opening 113 gradually increases in the second circulation direction. Along the second circulation direction, the cross-section obtained by intercepting the first opening 113 with the XY plane can be an expanding trapezoid. The first opening 113 is designed to have a gradually increasing flow-through area in the second circulation direction, which can reduce the resistance of the cooling medium entering the accommodating cavity 111, increase the flow velocity of the cooling medium when entering the accommodating cavity 111, shorten the time for the cooling medium to contact the module 13 to be cooled, and thus improve the heat dissipation efficiency of the cooling medium inside the accommodating cavity 111 for the module 13 to be cooled.

[0090] Please refer to Figure 7 , in certain embodiments, when the cooling medium in the cooling circulation loop flows along the second circulation direction, the flow-through area of the second interface 119 gradually increases in the second circulation direction.

[0091] Specifically, the "flow-through area of the second interface 119" refers to the area of the cross-section obtained by intercepting the second interface 119 with the YZ plane. The flow-through area of the second interface 119 near the communication pipe 35 is smaller than the flow-through area of the second interface 119 near the accommodation cavity 117, and the flow-through area of the second interface 119 gradually increases in the first circulation direction. Along the second circulation direction, the cross-section obtained by intercepting the second interface 119 with the XY plane can be trapezoidal. The second interface 119 is designed to have a gradually increasing flow-through area in the second circulation direction, which can reduce the resistance of the cooling medium entering the accommodation cavity 117, increase the flow rate of the cooling medium when entering the accommodation cavity 117, shorten the time for the cooling medium to enter the interlayer 116, promote the timely outflow of the cooling medium with a higher temperature after contacting the module 13 to be cooled and carry away the heat, and improve the heat exchange efficiency of the circulation loop.

[0092] Please refer to Figure 4 and Figure 7 , in some embodiments, when the cooling medium in the cooling circulation loop flows along the second circulation direction, the flow-through areas of the second interface 119 and the first opening 113 both gradually increase in the second circulation direction. The explanation here refers to the previous text and will not be elaborated here. Since the flow-through areas of the second interface 119 and the first opening 113 both gradually increase in the second circulation direction, on the one hand, it can reduce the resistance of the cooling medium entering the accommodation cavity 111, increase the flow rate of the cooling medium when entering the accommodation cavity 111, and shorten the time for the cooling medium to contact the module 13 to be cooled, thereby improving the heat dissipation efficiency of the cooling medium inside the accommodation cavity 111 for the module 13 to be cooled; on the other hand, it can reduce the resistance of the cooling medium entering the accommodation cavity 117, increase the flow rate of the cooling medium when entering the accommodation cavity 117, shorten the time for the cooling medium to enter the interlayer 116, promote the timely outflow of the cooling medium with a higher temperature after contacting the module 13 to be cooled and carry away the heat, and improve the heat exchange efficiency of the circulation loop.

[0093] The conveying distance between the first interface 118 and the input total port 301 is negatively correlated with the volume of the interlayer 116.

[0094] Specifically, taking Figure 6Taking the first circulation direction shown as an example, after the cooling medium enters the input main port 301, the cooling medium will flow into each interlayer 116 from the first main pipe 31 along the first branch pipes 33 corresponding to different interlayers 116 successively. Since the distances between the respective interlayers 116 and the input main port 301 are different (the flow paths have differences in distance), for the interlayer 116 that is farther from the input main port 301, the cooling medium arrives and enters later. At the same time, since the cooling medium has a certain mass, affected by gravity, the flow rate of the cooling medium in the first circulation direction will slow down due to gravity. More specifically, the flow rate of the cooling medium in the first main pipe 31 will slow down along the third direction Z and away from the input main port 301, and thus it will also affect the time when the cooling medium reaches the different interlayers 116 in the third direction Z. Among them, in the embodiment where the energy storage devices 10 are stacked in the third direction Z, the time when the cooling medium reaches the first interface 118 of the interlayer 116 will be earlier than the time when the cooling medium reaches the first interface 118 of the interlayer 116 of the top energy storage device 10.

[0095] More specifically, the slowdown of the flow rate of the cooling medium in the third direction Z will further affect the flow rate when the cooling medium enters the interlayer 116. Generally, different flow rates result in different flow-through amounts in different interlayers within the same time. Therefore, the heat exchange efficiencies of different interlayers are also different. The flow-through amount is the total amount of the cooling medium input into the interlayer per unit time. The interlayer with a larger flow-through amount per unit time can take away the heat of the module 13 to be cooled faster, has a higher heat exchange efficiency, and a better heat dissipation effect. Among them, when the energy storage devices are stacked in the third direction Z, if the volumes of different interlayers are the same, the flow rate of the cooling medium in the interlayer of the bottom energy storage device is greater than the flow rate of the cooling medium in the interlayer of the top energy storage device. As a result, the time to fill the top interlayer will be much later than the time to fill the bottom interlayer, which causes a delay in the heat dissipation of the module 13 to be cooled in contact with the top interlayer by the cooling medium in the cooling circulation loop, and further leads to uneven heat dissipation of different modules 13 to be cooled in the third direction Z, that is, the heat of the module 13 to be cooled closer to the input main port is dissipated earlier, and the heat of the module 13 to be cooled farther from the input main port is dissipated later. This will affect the working stability of the entire energy storage device 10. Therefore, it is necessary to change the volumes of different interlayers in the third direction Z so that the time for the cooling medium to fill the interlayer 116 is basically the same.

[0096] Specifically, negative correlation means that: for the interlayer 116 with a shorter conveying distance between the first interface 118 and the input main port 301, its (the interlayer 116) volume is larger; for the interlayer 116 with a longer conveying distance between the first interface 118 and the input main port 301, its volume is smaller, such as Figure 8 and Figure 9As shown. When the cooling medium flows in the first circulation direction, the conveying distance between the first interface 118 and the input main port 301 is: the first distance that the cooling medium flows from the input main port 301 in the first main pipe 31 to the first branch pipe 33, plus the second distance (i.e., the pipe length of the first branch pipe 33) that it flows in the first branch pipe 33 to the first interface 118.

[0097] Please refer to Figure 7 , in some embodiments, when the cooling medium flows in the second circulation direction, the second main pipe 32 is provided with an input main port 301 for the cooling medium to flow in. The conveying distance between the first interface 118 and the input main port 301 is also negatively correlated with the volume of the interlayer 116.

[0098] Specifically, taking Figure 7 the second circulation direction shown as an example, after the cooling medium enters the input main port 301, the cooling medium will flow into each energy storage device 10 from the second main pipe 32 along the first branch pipes 33 corresponding to different energy storage devices 10 in sequence. Since the distances between the energy storage devices 10 and the input main port 301 are different (the flow paths have differences in distance), the farther the energy storage device 10 is from the input main port 301, the later the cooling medium arrives and enters. At the same time, since the cooling medium has a certain mass, affected by gravity, the flow rate of the cooling medium in the second circulation direction will slow down due to gravity. More specifically, the flow rate of the cooling medium in the second main pipe 32 will slow down along the third direction Z and away from the input main port 301, so it will also affect the time when the cooling medium reaches different energy storage devices 10 in the third direction Z. Among them, in the embodiment where the energy storage devices 10 are stacked in the third direction Z, the time when the cooling medium reaches the first opening 113 of the bottom energy storage device 10 will be earlier than the time when the cooling medium reaches the first opening 113 of the top energy storage device 10. Correspondingly, the time when the cooling medium flows out from the second opening 115 of the bottom energy storage device 10 and reaches the corresponding second interface 119 will also be earlier than the time when the cooling medium reaches the second opening 115 of the top and reaches the corresponding second interface 119. If the volumes of different interlayers are the same, the time when the cooling medium fills the bottom interlayer will be much earlier than the time when the cooling medium fills the top interlayer, resulting in a delay in the heat dissipation of the module 13 to be cooled in contact with the top interlayer, and further causing uneven heat dissipation of different modules 13 to be cooled in the third direction Z, that is, the heat of the module 13 closer to the input main port is dissipated earlier, and the heat of the module 13 farther from the input main port is dissipated later, which will affect the working stability of the entire energy storage device 10. Therefore, it is necessary to change the volumes of different interlayers in the third direction Z so that the time for the cooling medium to fill the interlayer 116 is basically the same.

[0099] Specifically, the explanation of the negative correlation is the same as that in the previous text and will not be elaborated here. When the cooling medium flows in the second circulation direction, the conveying distance between the first interface 118 and the input main port 301 is: the first distance that the cooling medium flows from the first joint 118 into the first branch pipe 33 and flows in the first branch pipe 33 to the first main pipe 31 (i.e., the pipe length of the first branch pipe 33), plus the second distance that it flows in the first main pipe 31 to the output main port 303.

[0100] Whether the cooling medium flows along the first circulation direction as in Figure 2 or along the second circulation direction as in Figure 7 Taking the five interlayers (interlayer 116a, interlayer 116b, interlayer 116c, interlayer 116d, interlayer 116e) corresponding to the five energy storage devices 10 as an example, the conveying distances La of the interlayer 116a, Lb of the interlayer 116b, Lc of the interlayer 116c, Ld of the interlayer 116d, and Le of the interlayer 116e satisfy the relationship: La > Lb > Lc > Ld > Le. Therefore, the volumes Sa of the corresponding interlayer 116a, Sb of the interlayer 116b, Sc of the interlayer 116c, Sd of the interlayer 116d, and Se of the interlayer 116e satisfy the relationship: Sa < Sb < Sc < Sd < Se.

[0101] In some embodiments, the accommodating cavity 117 is surrounded by a bottom wall 1161, a top wall 1163, and a side wall 1165. At this time, the dimensions of the bottom wall 1161, the top wall 1163, and the side wall 1165 can be changed to achieve a negative correlation between the conveying distance between the first interface 118 and the input main port 301 and the volume of the interlayer 116, as shown in Figure 8 shown.

[0102] Please refer to 2, Figure 3 and Figure 9 , in some embodiments, the blocking member 1167 is a convex block. In one example, along the direction of the first main pipe 31 away from the input main port 301, the volume of the convex blocks in the multiple interlayers 116 gradually increases. Please refer to 7 and Figure 9 , in another example, along the direction of the second main pipe 32 away from the input main port 301, the volume of the convex blocks in the multiple interlayers 116 gradually increases.

[0103] Specifically, the convex block is a protrusion in the accommodating cavity 111 and is used to adjust the volume of the accommodating cavity 111. The volume of the convex block gradually increases, that is, V 1167a <V 1167b <V 1167c <V 1167d , which can make the volume of the accommodating cavity 111 of the interlayer 116 along the direction of the first main pipe 31 away from the input main port 301 gradually decrease, that is, V 116a<V 116b <V 116c <V 116d 。

[0104] Please refer to Figure 2 and Figure 3 In some embodiments, the energy storage device 10 includes at least two energy storage housings 11, the energy storage device 10 includes at least two modules to be cooled 13, the at least two modules to be cooled 13 are respectively accommodated in the at least two energy storage housings 11, the modules to be cooled 13 in the at least two energy storage housings 11 are battery modules 131, the module to be cooled 13 in one of the energy storage housings 11 is a control module 133, at least two energy storage devices 10 having battery modules 131 are stacked, and the energy storage device 10 having the control module 133 is disposed on top of the energy storage device 10 having the battery module 131 at the uppermost layer.

[0105] Specifically, the battery module 131 or the control module 133 can be placed in the accommodation cavity 111 of the energy storage housing 11. The control module 133 can be one or more. The plurality of energy storage devices 10 are stacked in the third direction Z. The arrangement of the energy storage device 10 having the control module 133 and the energy storage device 10 having the battery module 131 is not limited. The energy storage device 10 having the control module 133 can be disposed at the bottom of the energy storage device 10 having the battery module 131 at the lowermost layer, or at the top of the energy storage device 10 having the battery module 131 at the uppermost layer, or between two adjacent energy storage devices 10 having the battery module 131, thereby increasing the flexibility of the layout. In the embodiments of the present application, the energy storage device 10 having the control module 133 is disposed on top of the energy storage device 10 having the battery module 131 at the uppermost layer.

[0106] Please refer to Figure 2 and Figure 7 In some embodiments, the first interface 118 includes at least two. The first branch pipes 33 include at least two. The at least two first branch pipes 33 respectively correspond to the at least two first interfaces 118. The first branch pipes 33 are respectively communicated with the first main pipe 31 and the corresponding first interfaces 118.

[0107] Specifically, in the embodiments of the present application, there are two first interfaces 118 and two first branch pipes 33 respectively, thereby constructing two conveying paths for the cooling medium. When the cooling medium flows in the first circulation direction, the conveying path is the path for the cooling medium to be input from the first main pipe 31 to the first interface 118 along the first branch pipe 33; when the cooling medium flows in the second circulation direction, the conveying path is the path for the cooling medium to be output from the first interface 118 and input into the first main pipe 31 through the first branch pipe 33. In other embodiments of the present application, the first interface 118 and the first branch pipe 33 may be two, three, four, five or more. The two conveying paths can increase the flow rate of the cooling medium per unit time and improve the efficiency of heat exchange. The two conveying paths can also provide redundancy and backup. When the first interface 118 or the first branch pipe 33 in any one of the conveying paths fails and cannot convey the cooling medium, it can be ensured that there is still a conveying path in the first circulation direction to convey the cooling medium to the interlayer 116, ensuring the cooling efficiency of the interlayer 116 for the energy storage housing 11. The two conveying paths can also ensure that there is still a conveying path in the second circulation direction to output the cooling medium to the first main pipe 31, ensuring that the cooling medium with a higher temperature can be timely output from the interlayer 116 and improving the heat dissipation efficiency of the cooling module 30.

[0108] Please refer to Figure 2 and Figure 7 , in some embodiments, the first opening 113 includes at least two. The second branch pipe 34 includes at least two. At least two second branch pipes 34 correspond to at least two first openings 113 respectively. The second branch pipes 34 are respectively connected to the second main pipe 32 and the corresponding first opening 113.

[0109] Specifically, in the embodiments of the present application, there are two first openings 113 and two second branch pipes 34 respectively, thereby constructing two conveying paths for the cooling medium. When the cooling medium flows in the first circulation direction, the conveying path is the path for the cooling medium to be input from the first opening 113 in the accommodating cavity 111 to the second branch pipe 34; when the cooling medium flows in the second circulation direction, the conveying path is the path for the cooling medium to be output from the second main pipe 32 to the second branch pipe 34 and input into the accommodating cavity 111 from the first opening 113. In other embodiments of the present application, the number of the first openings 113 and the second branch pipes 34 can be two, three, four, five or more. The two conveying paths can increase the flow rate of the cooling medium per unit time and improve the heat exchange efficiency. The two conveying paths can also provide redundancy and backup. When a failure occurs in the first opening 113 or the second branch pipe 34 in any one of the conveying paths, resulting in the inability to convey the cooling medium, it can be ensured that there is still one conveying path in the first circulation direction to output the cooling medium in the accommodating cavity 111 to the second branch pipe 34, ensuring that the cooling medium with a higher temperature can be timely output from the accommodating cavity 111 and ensuring the heat dissipation efficiency for the module 13 to be cooled. The two conveying paths can also ensure that there is still one conveying path in the second circulation direction to output the cooling medium in the second main pipe 32 to the second branch pipe 34 and input it into the module 13 to be cooled from the first opening 113, ensuring that the cooling medium can timely contact the module 13 to be cooled and exchange heat with the module 13 to be cooled, and improving the heat exchange efficiency of the module 13 to be cooled in the accommodating cavity 111.

[0110] Please refer to FIGS. 1, Figure 2 , Figure 3 and Figure 10 , embodiments of the present application provide an energy storage system 100. The energy storage system 100 includes the energy storage device 10 according to any one of the above embodiments.

[0111] Specifically, the energy storage system 100 is composed of one or more energy storage devices 10. The arrangement manner of the multiple energy storage devices 10 is not limited in the present application, and the multiple energy storage devices 10 are accommodated in the energy storage cabinet 30.

[0112] In the energy storage housing 11 of the energy storage device 10 of the energy storage system 100, the accommodation cavity 111 communicates with the first opening 113 and the second opening 115 to form a first passage. The interlayer 116 communicates with the first interface 118 and the second interface 119 through the accommodation cavity 117 to form a second passage. The first passage communicates with the second passage to form a cooling circulation loop for the cooling medium to flow through. The cooling medium can circulate in the cooling circulation loop to dissipate heat from the module 13 to be cooled in the accommodation cavity 111. Since the interlayer 116 is provided at the bottom of the energy storage housing 11, that is, the interlayer 116 is provided inside the energy storage housing 11, the interlayer 116 will not have excessive heat transfer with the surrounding air. That is, the cooling energy of the cooling medium in the interlayer 116 can be fully absorbed by the module 13 to be cooled, thereby improving the heat dissipation efficiency of the module 13 to be cooled in the accommodation cavity 111.

[0113] In addition, the cooling circulation loop formed by the first passage and the second passage provides two levels of cooling effects for the module 13 to be cooled. On the one hand, the first passage allows the cooling medium to enter the accommodation cavity 111 of the module 13 to be cooled and directly exchange heat with the module 13 to be cooled inside the accommodation cavity 111, thereby cooling the module 13 to be cooled. On the other hand, before or after the cooling medium is delivered into the accommodation cavity 111, the interlayer 116, which is a part of the cooling circulation loop, is provided below the accommodation cavity 111, allowing the cooling medium to exchange heat with the accommodation cavity 111 and further cooling the module 13 to be cooled. Therefore, during the circulation of the cooling medium, the energy storage housing 11 of the present application enables the module 13 to be cooled to absorb the cooling energy of the cooling medium in the accommodation cavity 111 and the accommodation cavity 117, thereby improving the heat dissipation efficiency of the module 13 to be cooled.

[0114] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to the embodiments of the present application without departing from the principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. An energy storage housing (11), characterized in that: The energy storage housing (11) is provided with a receiving cavity (111), a first opening (113) and a second opening (115); the receiving cavity (111) is used to receive the module (13) to be cooled; the first opening (113) and the second opening (115) are both in communication with the receiving cavity (111) to form a first passage; The bottom of the energy storage housing (11) is provided with an interlayer (116), the interlayer (116) is provided with a receiving cavity (117), a first interface (118) and a second interface (119), the receiving cavity (117) is communicated with the first interface (118) and the second interface (119) to form a second passage, and the first passage and the second passage are used to jointly form a cooling circulation loop for circulating a cooling medium.

2. The energy storage housing (11) according to claim 1, characterized in that: The interlayer (116) includes a bottom wall (1161), a top wall (1163), and a side wall (1165) connecting the bottom wall (1161) and the top wall (1163), and the accommodating cavity (117) is surrounded by the bottom wall (1161), the top wall (1163), and the side wall (1165).

3. The energy storage housing (11) according to claim 1, characterized in that: The interlayer (116) includes a bottom wall (1161), a top wall (1163), a side wall (1165) connecting the bottom wall (1161) and the top wall (1163), and a blocking piece (1167) arranged in the accommodating cavity (117); the accommodating cavity (117) is surrounded by the bottom wall (1161), the top wall (1163), the side wall (1165) and the blocking piece (1167).

4. The energy storage housing (11) according to claim 3, characterized in that: The blocking member (1167) is located on a flow path of the cooling medium flowing from the first interface (118) toward the second interface (119), and is spaced apart from both the first interface (118) and the second interface (119).

5. The energy storage housing (11) according to claim 3, characterized in that: The blocking member (1167) includes at least one of a columnar structure, a block structure, a sheet structure, a plate structure and a maze structure.

6. The energy storage housing (11) according to claim 1, characterized in that: The first interface (118) and the first opening (113) are both located on a first side of the energy storage housing (11), the second interface (119) and the second opening (115) are both located on a second side of the energy storage housing (11), and the first side of the energy storage housing (11) is opposite to the second side of the energy storage housing (11).

7. An energy storage device (10), characterized in that: include: The energy storage housing (11) according to any one of claims 1 to 6; and A module to be cooled (13), wherein the module to be cooled (13) is accommodated in the accommodation cavity (111).

8. The energy storage device (10) according to claim 7, characterized in that: The energy storage device (10) further comprises: A first branch pipe (33), the first branch pipe (33) is connected to the outside of the energy storage housing (11) and communicates with the first interface (118); a second branch pipe (34), the second branch pipe (34) being connected to the outside of the energy storage housing (11) and communicating with the first opening (113); and A connecting pipe (35), the connecting pipe (35) is connected to the outside of the energy storage housing (11), and the second interface (119) is connected to the second opening (115) through the connecting pipe (35).

9. The energy storage device (10) according to claim 8, characterized in that: The second interfaces (119) include at least two, the connecting tubes (35) include at least two, and the second openings (115) include at least two. The at least two connecting tubes (35) correspond to the at least two second interfaces (119) and the at least two second openings (115), respectively, and the connecting tubes (35) are connected to the corresponding second interfaces (119) and the corresponding second openings (115), respectively.

10. The energy storage device (10) according to claim 8, characterized in that: The energy storage shell (11) includes at least two, the modules (13) to be cooled include at least two, the at least two modules (13) to be cooled are respectively accommodated in the at least two energy storage shells (11), and the at least two energy storage shells (11) are stacked. The energy storage device (10) also includes a first main pipe (31) and a second main pipe (32), one of the first main pipe (31) and the second main pipe (32) is used for the cooling medium to flow in, and the other is used for the cooling medium to flow out. The first interface (118) is connected to the first main pipe (31) through a first branch pipe (33), the first opening (113) is connected to the second main pipe (32) through a second branch pipe (34), and the second interface (119) is connected to the second opening (115) through a connecting pipe (35), so as to form the cooling circulation loop.

11. The energy storage device (10) according to claim 10, characterized in that: The first main pipe (31) or the second main pipe (32) is provided with an input main port (301) for the cooling medium to flow in, and the conveying distance between the first interface (118) and the input main port (301) is negatively correlated with the volume size of the accommodating chamber (117).

12. The energy storage device (10) according to claim 11, characterized in that: The blocking member (1167) in the interlayer (116) is a protrusion, and along the direction of the first main pipe (31) or the second main pipe (32) away from the input main port (301), the volume of the protrusions in the plurality of interlayers (116) gradually increases.

13. The energy storage device (10) according to claim 10, characterized in that: The first main pipe (31) is provided with an input main port (301) for the cooling medium to flow in, the second main pipe (32) is provided with an output main port (303) for the cooling medium to flow out, the first branch pipe (33) is used to input the cooling medium in the first main pipe (31) into the accommodating chamber (117) through the first interface (118), the connecting pipe (35) is used to input the cooling medium output from the second interface (119) into the accommodating chamber (111) through the second opening (115), the second branch pipe (34) is used to input the cooling medium output from the first opening (113) into the second main pipe (32), and the cooling medium in the cooling circulation loop flows along a first circulation direction; or The second main pipe (32) is provided with an input main port (301) for the cooling medium to flow in, the first main pipe (31) is provided with an output main port (303) for the cooling medium to flow out, the second branch pipe (34) is used to input the cooling medium in the second main pipe (32) into the accommodating chamber (111) through the first opening (113), the connecting pipe (35) is used to input the cooling medium output from the second opening (115) into the accommodating chamber (117) through the second interface (119), the first branch pipe (33) is used to input the cooling medium output from the first interface (118) into the first main pipe (31), and the cooling medium in the cooling circulation loop flows along a second circulation direction, and the first circulation direction is opposite to the second circulation direction.

14. The energy storage device (10) according to claim 13, characterized in that: When the cooling medium in the cooling circulation loop circulates along a first circulation direction, the flow area of ​​the first interface (118) and / or the flow area of ​​the second opening (115) gradually increases in the first circulation direction; When the cooling medium in the cooling circulation loop flows along the second circulation direction, the flow area of ​​the second interface (119) and / or the flow area of ​​the first opening (113) gradually increases in the second circulation direction.

15. The energy storage device (10) according to claim 11, characterized in that: The energy storage shells (11) include at least two, the modules to be cooled (13) include at least two, and the at least two modules to be cooled (13) are respectively accommodated in the at least two energy storage shells (11); the modules to be cooled (13) in at least two of the energy storage shells (11) are battery modules (131), the module to be cooled (13) in one of the energy storage shells (11) is a control module (133), at least two of the energy storage devices (10) having the battery modules (131) are stacked, and the energy storage device (10) having the control module (133) is arranged on top of the energy storage device (10) having the battery module (131) in the uppermost layer.

16. The energy storage device (10) according to any one of claims 10 to 15, characterized in that: The first interfaces (118) include at least two, the first branch pipes (33) include at least two, at least two of the first branch pipes (33) correspond to at least two of the first interfaces (118) respectively, and the first branch pipes (33) are respectively connected to the first main pipe (31) and the corresponding first interfaces (118).

17. The energy storage device (10) according to any one of claims 10 to 15, characterized in that: The first openings (113) include at least two, the second branch pipes (34) include at least two, at least two of the second branch pipes (34) correspond to at least two of the first openings (113), respectively, and the second branch pipes (34) are respectively connected to the second main pipe (32) and the corresponding first openings (113).

18. The energy storage device (10) according to claim 7, characterized in that: The module to be cooled (13) comprises a battery module (131) and a control module (133).

19. An energy storage system (100), characterized in that: include: At least one energy storage device (10) according to any one of claims 7 to 18.

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