Energy storage device

Abstract

The utility model relates to an energy storage device. Comprising a shell, a battery cluster and a cooling mechanism, the shell comprises a shell, a first separator and a second separator, the shell defines a containing cavity for containing the first separator, the first separator divides the containing cavity into a first cavity and a second cavity which are arranged in the height direction of the shell, the cooling mechanism is located in the first cavity, and the battery cluster is located in the second cavity; the battery cluster comprises a plurality of battery modules arranged along the height direction of the shell; the second isolation pieces are located in the first cavity and divide the first cavity into a plurality of separation cavities arranged in the length direction of the shell, the cooling mechanism comprises a plurality of cooling units, and the different cooling units are located in the different separation cavities respectively. In this way, the cooling mechanism can make full use of the residual space in the height direction of the shell, it is ensured that the number of battery clusters capable of being installed in the shell is increased, and finally the area energy density of the energy storage device is improved.

Description

Technical Field

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

[0002] Energy storage devices are used to store and output energy, and are widely used in the field of new energy. For traditional energy storage devices, it is usually difficult to install a sufficient number of battery modules in a limited space, so that the energy storage device has a limited amount of energy stored per unit area when the area occupied is fixed, thus affecting the area energy density of the energy storage device. Summary of the invention

[0003] A technical problem solved by the present application is how to increase the area energy density of the energy storage device.

[0004] An energy storage device includes a shell, a battery cluster and a cooling mechanism, wherein the shell includes an outer shell, a first isolating member and a second isolating member, the outer shell encloses a receiving cavity for accommodating the first isolating member, the first isolating member divides the receiving cavity into a first cavity and a second cavity arranged along the height direction of the shell, the cooling mechanism is located in the first cavity, the battery cluster is located in the second cavity, and the battery cluster includes a plurality of battery modules arranged along the height direction of the shell; the number of the second isolating members is plural and they are located in the first cavity, and the plurality of the second isolating members divide the first cavity into a plurality of separated cavities arranged along the length direction of the shell, and the cooling mechanism includes a plurality of cooling units, and different cooling units are respectively located in different separated cavities.

[0005] In one embodiment, there are multiple battery clusters, all of which are arranged to form at least one row of battery cells, and the battery clusters in the same row of battery cells are arranged along the length direction of the shell.

[0006] In one embodiment, there are multiple battery clusters, all of which are arranged to form multiple rows and columns of battery cells, the battery clusters in the same column of battery cells are arranged along the width direction of the shell, the number of cooling units is equal to the number of columns of the battery cells, and the projections of different cooling units along the height direction of the shell can cover the battery cells in different columns.

[0007] In one of the embodiments, the projection of the cooling unit along the height direction of the housing can cover all the battery clusters in the same column of the battery cells.

[0008] In one embodiment, the battery cluster and the first isolating member are spaced apart from each other along a height direction of the housing.

[0009] In one of the embodiments, a dimension of the spacing space between the battery cluster and the first separator in the height direction of the housing is 100 mm to 130 mm.

[0010] In one embodiment, a through hole connecting the first cavity and the second cavity is formed on the first isolating member, and a cooling pipe of the cooling mechanism is passed through the through hole to be connected with the battery cluster.

[0011] In one of the embodiments, in the height direction of the shell, the size of the first cavity is recorded as A1, and the size of the accommodating cavity is recorded as A2, wherein 1 / 7≤A1 / A2≤1 / 3.

[0012] In one embodiment, it further includes a high-voltage control unit located in the second cavity, the number of the high-voltage control units is equal to and corresponds to the battery clusters, and the high-voltage control unit is located on a side of the battery cluster away from the first cavity.

[0013] In one embodiment, the housing includes a main body and a switch door, wherein the switch door is rotatably connected to the main body and can open or close the second chamber.

[0014] In one embodiment, the shell further includes a filter element with filter holes, the first cavity forms an air inlet and an air outlet on the shell, the air inlet and the air outlet are arranged along the width direction of the shell, the filter element is connected to the shell and covers the air inlet and the air outlet, and the filter holes connect the first cavity and the outside.

[0015] In one embodiment, the shell further includes a third isolating member connected to the first isolating member, the third isolating member divides the accommodating chamber into a third chamber and a fourth chamber arranged along the length direction of the shell, the third chamber includes the first chamber and the second chamber, the energy storage device further includes a control mechanism and a fire-fighting mechanism, and the control mechanism and the fire-fighting mechanism are both located in the fourth chamber.

[0016] A technical effect of an embodiment of the present application is: since the first cavity and the second cavity are arranged along the height direction of the shell, the battery cluster and the cooling mechanism are arranged along the height direction of the shell. In this way, the cooling mechanism can make full use of the remaining space in the height direction of the shell, and avoid the cooling mechanism from compressing the remaining space perpendicular to the height direction of the shell, thereby extending the installation space of the battery cluster in the direction perpendicular to the height direction of the shell, so that when the shell of the entire energy storage device has a certain footprint, the number of battery clusters that can be installed in the shell increases, thereby improving the energy value of the energy storage device per unit footprint, and ultimately improving the area energy density of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of an energy storage device provided in one embodiment.

[0018] Figure 2 for Figure 1 A front view of the energy storage device shown.

[0019] Figure 3 for Figure 1 A schematic diagram of the partial three-dimensional exploded structure of the energy storage device shown.

[0020] Figure 4 for Figure 1 A schematic diagram of the partial planar structure of the energy storage device shown.

[0021] Figure 5 for Figure 4 Top view of the .

[0022] Figure 6 for Figure 1 Schematic diagram of the three-dimensional structure of the battery module in the energy storage device shown.

[0023] Figure numerals: energy storage device 10, shell 100, housing 110, main body 111, switch door 112, first isolation member 121, second isolation member 122, third isolation member 123, accommodating chamber 130, first chamber 131, partition chamber 1311, air inlet 1312, air outlet 1313, second chamber 132, partition space 1321, third chamber 133, fourth chamber 134, filter 150, filter hole 151, battery cluster 200, battery module 210, cooling mechanism 300, cooling unit 310, control mechanism 410, fire fighting mechanism 420, high voltage control unit 430. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0030] See also Figure 1 , Figure 2 and Figure 3 In one embodiment of the present application, an energy storage device 10 includes a housing 100, a battery cluster 200, a cooling mechanism 300, a control mechanism 410, and a fire fighting mechanism 420. A housing 130 is provided in the housing 100, and the battery cluster 200, the cooling mechanism 300, the control mechanism 410, and the fire fighting mechanism 420 are all accommodated in the housing 130.

[0031] See also Figure 1 , Figure 2 and Figure 3 In some embodiments, the housing 100 includes an outer shell 110, a first isolating member 121, a second isolating member 122, and a third isolating member 123. The outer shell 110 encloses a receiving cavity 130, and the third isolating member 123 and the first isolating member 121 are located in the receiving cavity 130. The outer shell 110 may be in the shape of a rectangular parallelepiped, so that the entire housing 100 is in the shape of a rectangular parallelepiped. For example, the housing 100 may be a standard 20-foot container, so that the length dimension of the housing 100 may be 6058 mm, the width dimension may be 2438 mm, and the height dimension may be 2896 mm. Figure 1In the figure, the X-axis represents the length direction of the housing 100, the Y-axis represents the width direction of the housing 100, and the Z-axis represents the height direction of the housing 100. Both the third isolating member 123 and the first isolating member 121 can be plate-shaped structures. The third isolating member 123 is connected to the housing 110. The first isolating member 121 is connected to the third isolating member 123 and separates the accommodating chamber 130 into a first chamber 131 and a second chamber 132 that are independently arranged. The first chamber 131 and the second chamber 132 are arranged along the height direction of the housing 100. The third isolating member 123 separates the accommodating chamber 130 into a third chamber 133 and a fourth chamber 134 that are independently arranged. The third chamber 133 and the fourth chamber 134 are arranged along the length direction of the housing 100. The third chamber 133 includes the first chamber 131 and the second chamber 132. It can be understood that the first isolating member 121 separates the third chamber 133 into the first chamber 131 and the second chamber 132. The dimensions of the fourth cavity 134 and the third cavity 133 along the height direction of the housing 100 may be equal to the dimensions of the accommodating cavity along the height direction of the housing 100. The fourth cavity 134 and the third cavity 133 are arranged along the length direction of the housing 100 respectively. The third isolating member 123 may have good thermal insulation performance, reducing the speed at which the heat between the fourth cavity 134 and the third cavity 133 is transferred through the third isolating member 123. The volume of the third cavity 133 may be much larger than the volume of the fourth cavity 134. The first isolating member 121 is located in the third cavity 133 and is connected to the housing 110 and the third isolating member 123. At the same time, the first isolating member 121 separates the third cavity 133 into a first cavity 131 and a second cavity 132. The dimensions of the first cavity 131 and the second cavity 132 along the length direction of the housing 100 may be equal to the dimensions of the third cavity 133 along the length direction of the housing. The volume of the second cavity 132 may be much larger than the volume of the first cavity 131. The first cavity 131 and the second cavity 132 are arranged along the height direction of the housing 100. Along the height direction of the housing 100, the first cavity 131 may be located directly above the second cavity 132. In other embodiments, the housing 100 may also be in a prism shape or the like.

[0032] See also Figure 1 , Figure 2 and Figure 3 In some embodiments, the second isolating member 122 may also be a plate-like structure. The number of the second isolating members 122 is multiple and accommodated in the first cavity 131. The second isolating members 122 are arranged at intervals along the length direction of the shell 100. The multiple second isolating members 122 divide the first cavity 131 into multiple partition cavities 1311. Obviously, the partition cavities 1311 are arranged along the length direction of the shell 100.

[0033] See also Figure 3 , Figure 4 and Figure 5 In some embodiments, the battery cluster 200 is located in the second cavity 132, and the battery cluster 200 includes a plurality of battery modules 210 (eg Figure 6 ), the battery module 210 is used to store and output electric energy, and multiple battery modules 210 in the battery cluster 200 are arranged along the height direction of the housing 100, for example, multiple battery modules 210 are stacked on each other along the height direction of the housing 100, and the number of battery modules 210 in one battery cluster 200 may be eight, etc. The number of battery clusters 200 may be multiple, and all battery clusters 200 may be arranged in the second cavity 132 to form at least one row of battery cells, and multiple battery clusters 200 in the same row of battery cells are arranged along the length direction of the housing 100. The number of rows of battery cells may be one, two or three rows, etc., and the number of battery clusters 200 included in each row of battery cells is equal, so that all battery clusters 200 are arranged to form multiple rows and multiple columns of battery cells, and a column of battery cells includes multiple battery clusters 200, and the battery clusters 200 in the same column of battery cells are arranged along the width direction of the housing 100.

[0034] See also Figure 1 and Figure 2 In some embodiments, the housing 110 includes a main body 111 and a switch door 112, the main body 111 encloses a receiving cavity 130, and the switch door 112 is rotatably connected to the main body 111 and corresponds to the second cavity 132, so that the switch door 112 can open or close the second cavity 132. The number of the switch doors 112 can be equal to the number of the battery clusters 200, so that the switch doors 112 and the battery clusters 200 form a one-to-one correspondence, and each time a switch door 112 is opened, one of the battery clusters 200 will be exposed in the second cavity 132, so that it is convenient for operators to install, disassemble or maintain the battery clusters 200.

[0035] See also Figure 3 , Figure 4 and Figure 5 In some embodiments, the cooling mechanism 300 is disposed in the first cavity 131, and a liquid flow channel is provided in the cooling mechanism 300, and the liquid flow channel has a liquid inlet and a liquid outlet. When a coolant such as ethanol or water is introduced into the liquid inlet, the coolant will absorb the heat of the cooling mechanism 300, and the coolant that absorbs the heat will be discharged from the liquid outlet, so that the coolant absorbs heat and cools the cooling mechanism 300. When the liquid continuously flows in from the liquid inlet and flows out from the liquid outlet, the coolant can continuously absorb heat and cool the cooling mechanism 300, so the cooling mechanism 300 will have a cooling function. In view of the fact that the cooling mechanism 300 is disposed in the first cavity 131, the heat generated by the battery cluster 200 will enter the first cavity 131 and be absorbed by the cooling mechanism 300 and discharged to the outside of the energy storage device 10, and finally the heat generated by the battery cluster 200 is discharged to the outside of the energy storage device 10 through the cooling mechanism 300, thereby realizing the heat dissipation function of the cooling mechanism 300 for the battery cluster 200.

[0036] In some embodiments, a through hole connecting the first cavity 131 and the second cavity 132 is provided on the first isolation member 123, and a cooling pipe of the cooling mechanism 300 is passed through the through hole, so that the cooling pipe enters from the first cavity 131 into the second cavity 132 and is connected to a heat sink having a heat dissipation channel in the battery module 210, thereby connecting the tube cavity of the cooling pipe with the heat dissipation channel of the battery module 210. When the coolant flows in the heat dissipation channel, the heat dissipation channel will absorb the heat of the battery module 210 and discharge it to the outside of the energy storage device 10 through the cooling mechanism 300, thereby achieving heat dissipation of the battery module 210 and the entire battery cluster 200.

[0037] See also Figure 3 , Figure 4 and Figure 5 In some embodiments, the cooling mechanism 300 includes a plurality of cooling units 310, and the number of the cooling units 310 is equal to the number of the partition chambers 1311, so that the cooling units 310 and the partition chambers 1311 form a one-to-one correspondence, that is, different cooling units 310 are respectively located in different partition chambers 1311. Through the action of the second isolation member 122, the independence of each partition chamber 1311 and the cooling unit 310 can be maintained, and interference between the cooling units 310 can be avoided. When the battery clusters 200 are arranged to form multiple rows and columns of battery cells, the number of cooling units 310 is equal to the number of columns of battery cells, and the projections of different cooling units 310 along the height direction of the shell 100 can cover cooling units 310 in different columns, so that each cooling unit 310 is responsible for simultaneously dissipating heat for multiple battery clusters 200 in a column of battery cells, and multiple battery clusters 200 can share one cooling unit 310. On the one hand, this can reduce the number of cooling units 310 used, and on the other hand, battery cells in different columns can dissipate heat through different cooling units 310, which can also improve the heat dissipation efficiency of each column of battery cells, thereby reducing the temperature difference between each battery cluster 200, avoiding the formation of local high temperature in the accommodating cavity 130, and preventing the components in the accommodating cavity 130 from being damaged at high temperature, thereby improving the service life of the entire energy storage device 10.

[0038] See also Figure 3 , Figure 4 and Figure 5In some embodiments, the first cavity 131 forms an air inlet 1312 and an air outlet 1313 on the housing 110, and the air inlet 1312 and the air outlet 1313 are arranged along the width direction of the housing 100, so that the air inlet 1312 and the air outlet 1313 are respectively located on opposite sides of the width direction of the housing 100. The airflow can enter the first cavity 131 from the air inlet 1312 and flow out from the air outlet 1313, so that the convection of gas is formed in the first cavity 1313, and the convection of gas will further dissipate heat and cool the cooling mechanism 300, thereby improving the heat dissipation efficiency of the cooling mechanism 300 for the battery cluster 200, and then improving the heat dissipation efficiency of the entire energy storage device 10.

[0039] See also Figure 3 , Figure 4 and Figure 5 The housing 100 may further include a filter 150. The filter 150 may be a thin plate-shaped structure. A plurality of filter holes 151 may be provided on the filter 150. There are two filter elements 150. One of the filter elements 150 is connected to the housing 100 and covers the air inlet 1312. The filter holes 151 on the filter element 150 communicate with the outside and the first cavity 131. Another filter element 150 is connected to the housing 100 and covers the air outlet 133. The filter holes 151 on the filter element 150 communicate with the outside and the first cavity 131. External gas enters the first cavity 131 through the filter holes 151 on one of the filter elements 150, and flows out of the first cavity 131 through the filter holes 151 on the other filter element 150. By providing the filter element 150, while ensuring that sufficient airflow enters the first cavity 131 to form convection to dissipate heat and cool the cooling mechanism 300, large particles of foreign matter can be effectively prevented from entering the first cavity 131 and corroding the cooling mechanism 300.

[0040] See also Figure 2 , Figure 3 and Figure 4In some embodiments, the upper end of the battery cluster 200 and the first isolating member 121 are spaced apart in the height direction of the housing 100, so that the height of the first isolating member 121 in the height direction of the housing 100 is greater than the height of the upper end of the battery cluster 200, thereby forming a spacing space 1321 between the battery cluster 200 and the first isolating member 121. Obviously, the spacing space 1321 is a part of the second cavity 132. The dimension H of the spacing space 1321 in the height direction of the housing 100 can be 100 mm to 130 mm, for example, the specific dimension H of the spacing space 1321 in the height direction of the housing 100 can be 100 mm, 120 mm, 125 mm, or 130 mm. By setting the spacing space 1321, components such as fire pipeline speed and induction devices can be arranged in the spacing space 1321, that is, the spacing space 1321 provides sufficient installation space for the arrangement of fire pipeline speed and induction devices.

[0041] See also Figure 4 In some embodiments, the energy storage device 10 further includes a high-voltage control unit 430, and the number of the high-voltage control units 430 is equal to that of the battery clusters 200, so that the high-voltage control units 430 and the battery clusters 200 form a one-to-one correspondence. The high-voltage control unit 430 is located on the side of the battery cluster 200 away from the first cavity 131, that is, the high-voltage control unit 430 is located below the battery cluster 200. The high-voltage control unit 430 is located below the battery cluster 200, that is, the high-voltage control unit 430 is located on the side of the battery cluster 200 away from the first cavity 131. The high-voltage control unit 430 is used to perform high-voltage control on the battery cluster 200.

[0042] See also Figure 1 , Figure 2 and Figure 3 In some embodiments, the control mechanism 410 and the fire fighting mechanism 420 are located in the fourth cavity 134. The control mechanism 410 is used to control the working condition of the battery cluster 200, and the fire fighting mechanism 420 is used to deal with the fire prevention or explosion prevention of the entire energy storage device 10, thereby improving the safety of the energy storage device 10. Obviously, since the fourth cavity 134 and the third cavity 133 are arranged along the length direction of the shell 100, the control mechanism 410 and the fire fighting mechanism 420 are arranged along the length direction of the shell 100 with the battery cluster 200. In addition, since the first cavity 131 and the second cavity 132 are arranged along the height direction of the shell 100, the battery cluster 200 and the cooling mechanism 300 are arranged along the height direction of the shell 100.

[0043] Assume that the accommodating cavity 130 is divided into two cavities, which are respectively recorded as a battery cavity and a device cavity. The battery cavity and the device cavity are arranged along the length direction of the shell 100, the battery cluster 200 is located in the battery cavity, and the cooling mechanism 300 is located in the device cavity. In this way, on the one hand, the cooling mechanism 300 occupies a larger space in the length direction of the shell 100, thereby compressing the space occupied by the battery cluster 200 in the length direction of the shell 100, and also makes it impossible to effectively make full use of the remaining space in the height direction of the shell 100, so that when the shell 100 of the entire energy storage device 10 occupies a certain area, the number of battery clusters 200 that can be installed in the shell 100 is reduced, thereby affecting the energy value of the energy storage device 10 per unit area, and ultimately affecting the area energy density of the energy storage device 10. On the other hand, the same cooling mechanism 300 is used to dissipate heat for all battery clusters 200, that is, all battery clusters 200 share one cooling mechanism 300, so that the battery clusters 200 arranged close to the cooling mechanism 300 have a higher heat dissipation effect and a lower temperature, while the battery clusters 200 arranged far from the cooling mechanism 300 have a relatively poor heat dissipation effect and a higher temperature, thereby causing local high temperature in the energy storage device 10, which is not conducive to improving the life of the energy storage device 10.

[0044] It can be understood that, under the above assumptions, when a 20-foot shell 100 is used to form a 20-foot container, only ten battery clusters 200 can be installed in the battery cavity, and the ten battery clusters 200 are arranged to form two rows of battery cells, and each row of battery cells includes five battery clusters 200. The total capacity formed by the ten battery clusters 200 cannot reach the preset value, so that the total capacity of the 20-foot container formed by the 20-foot shell 100 cannot reach the preset value. Given that the size of a 20-foot container is a standard size, when it is necessary to make the energy storage device 10 reach the preset value, the size of the container will inevitably increase, resulting in the size of the container being a non-standard size, which is not conducive to the transportation of the energy storage device 10 at home and abroad, and increases the transportation cost of the energy storage device 10.

[0045] As for the energy storage device 10 in the above embodiment, the battery cluster 200 and the cooling mechanism 300 are arranged along the height direction of the shell 100. In this way, the cooling mechanism 300 can make full use of the remaining space in the height direction of the shell 100, thereby extending the installation space of the battery cluster 200 in the length direction of the shell 100, so that the number of battery clusters 200 that can be installed in the shell 100 increases when the shell 100 of the entire energy storage device 10 occupies a certain area, thereby improving the energy value of the energy storage device 10 per unit area, and finally improving the area energy density of the energy storage device 10. In addition, different columns of battery cells can be radiated through different cooling units 310, which can also improve the heat dissipation efficiency of each column of battery cells, thereby reducing the temperature difference between each battery cluster 200, avoiding the formation of local high temperature in the accommodating cavity 130, and preventing the components in the accommodating cavity 130 from being damaged at high temperature, thereby improving the service life of the entire energy storage device 10.

[0046] It can be understood that for the energy storage device 10 in the above embodiment, when a container of the same size as the above assumption is used, that is, a 20-foot shell 100 is also used to form a 20-foot container, the energy storage device 10 can be installed with twelve battery clusters 200, and the twelve battery clusters 200 are arranged to form two rows of battery cells, and each row of battery cells includes six battery clusters 200. The total capacity formed by the twelve battery clusters 200 can reach the preset value, so that the total capacity of the 20-foot container formed by the 20-foot shell 100 can reach the preset value. Obviously, when the size of the shell 100 remains unchanged with the above assumption, the energy storage device 10 can be installed with two more battery clusters 200, thereby effectively improving the area energy density of the energy storage device 10. Moreover, when the area energy density is improved, the size of the shell 100 still remains the standard 20 feet, which facilitates the transportation of the entire energy storage device 10 at home and abroad.

[0047] In some embodiments, the dimension of the first cavity 131 in the height direction of the housing 100 is A1, which can also be understood as the height of the first cavity 131 is A1, and the dimension of the accommodating cavity 130 in the height direction of the housing 100 is A2, which can also be understood as the height of the accommodating cavity 130 is A2, wherein 1 / 7≤A1 / A2≤1 / 3. For example, the specific value of A1 / A2 can be 1 / 7, 1 / 6, 1 / 4 or 1 / 3, etc.

[0048] Specifically, when A1 / A2 is less than 1 / 7, the volume of the first cavity 131 for accommodating the cooling mechanism 300 will be small, resulting in the problem that the cooling mechanism 300 is difficult to assemble when being replaced or loaded, increasing the assembly cost. Moreover, the first cavity 131 with a smaller volume can only accommodate the cooling mechanism 300 with a smaller volume, thereby reducing the heat dissipation power of the cooling mechanism 300, and ultimately affecting the heat dissipation effect of the entire energy storage device 10. When A1 / A2 is greater than 1 / 3, the spacing space 1321 between the battery cluster 200 and the first isolating member 121 will be smaller, so that the installation space of the fire protection pipeline line is insufficient, and the battery cluster 200 and the entire energy storage device 10 have safety hazards. When 1 / 7≤A1 / A2≤1 / 3, on the one hand, suitable installation space can be reserved for each component to improve the utilization rate of the space. On the other hand, in order to make the volume of the cooling mechanism 300 large enough to meet the heat dissipation requirements, the volume of the first cavity 131 is also large enough to improve the assembly efficiency of the cooling mechanism 300. On the other hand, it can provide sufficient installation space for the fire protection pipeline harness, eliminate safety hazards, achieve electrical isolation, and meet the overall safety of the energy storage device 10, thereby ensuring the use of the product.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An energy storage device, characterized in that: The invention comprises a shell, a battery cluster and a cooling mechanism, wherein the shell comprises an outer shell, a first isolating member and a second isolating member, the outer shell encloses a receiving cavity for accommodating the first isolating member, the first isolating member divides the receiving cavity into a first cavity and a second cavity arranged along the height direction of the shell, the cooling mechanism is located in the first cavity, the battery cluster is located in the second cavity, and the battery cluster comprises a plurality of battery modules arranged along the height direction of the shell; the number of the second isolating members is plural and they are located in the first cavity, the plurality of the second isolating members divide the first cavity into a plurality of separated cavities arranged along the length direction of the shell, the cooling mechanism comprises a plurality of cooling units, and different cooling units are respectively located in different separated cavities.

2. The energy storage device according to claim 1, characterized in that: There are multiple battery clusters, all of which are arranged to form at least one row of battery cells, and the battery clusters in the same row of battery cells are arranged along the length direction of the shell.

3. The energy storage device according to claim 1, characterized in that: There are multiple battery clusters, all of which are arranged to form multiple rows and columns of battery cells. The battery clusters in the same column of battery cells are arranged along the width direction of the shell. The number of cooling units is equal to the number of columns of battery cells, and the projections of different cooling units along the height direction of the shell can cover battery cells in different columns.

4. The energy storage device according to claim 3, characterized in that: The projection of the cooling unit along the height direction of the housing can cover all the battery clusters in the same column of the battery cells.

5. The energy storage device according to claim 1, characterized in that: The battery cluster and the first spacer are spaced apart from each other in a height direction of the housing.

6. The energy storage device according to claim 5, characterized in that: A dimension of a spacing space between the battery cluster and the first separator in a height direction of the housing is 100 mm to 130 mm.

7. The energy storage device according to claim 1, characterized in that: The first isolating member is provided with a through hole communicating the first cavity and the second cavity, and a cooling pipe of the cooling mechanism is passed through the through hole to be connected with the battery cluster.

8. The energy storage device according to claim 1, characterized in that: In the height direction of the shell, the size of the first cavity is recorded as A1, and the size of the accommodating cavity is recorded as A2, wherein 1 / 7≤A1 / A2≤1 / 3.

9. The energy storage device according to claim 1, characterized in that: It also includes a high-voltage control unit located in the second cavity, the number of the high-voltage control units is equal to and corresponds to the battery clusters, and the high-voltage control unit is located on a side of the battery cluster away from the first cavity.

10. The energy storage device according to claim 1, characterized in that: The housing comprises a main body and a switch door, wherein the switch door is rotatably connected to the main body and can open or close the second cavity.

11. The energy storage device according to claim 1, characterized in that: The shell also includes a filter element with filter holes, the first cavity forms an air inlet and an air outlet on the shell, the air inlet and the air outlet are arranged along the width direction of the shell, the filter element is connected to the shell and covers the air inlet and the air outlet, and the filter holes connect the first cavity and the outside.

12. The energy storage device according to claim 1, characterized in that: The shell also includes a third isolating member connected to the first isolating member, the third isolating member divides the accommodating chamber into a third chamber and a fourth chamber arranged along the length direction of the shell, the third chamber includes the first chamber and the second chamber, the energy storage device also includes a control mechanism and a fire-fighting mechanism, and the control mechanism and the fire-fighting mechanism are both located in the fourth chamber.

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