Energy storage device and energy storage system

Abstract

The utility model relates to the technical field of energy storage, and discloses an energy storage device and an energy storage system.The energy storage device comprises a cabinet body, a draught fan assembly, a flow equalizing assembly and battery assemblies, the cabinet body is provided with an air channel and a plurality of containing cavities, the containing cavities are used for containing the battery assemblies, each containing cavity is provided with a first air inlet and a first air outlet, and the air channel is in fluid communication with the first air inlet; the head of the battery assembly is located at the first air outlet of the accommodating cavity, and the tail is located at the first air inlet of the accommodating cavity. The fan assembly is provided with a second air outlet and a second air inlet, the second air outlet is in fluid communication with the air duct, and the second air inlet is in fluid communication with the first air outlet. The flow equalizing assembly is located in the air duct and is arranged close to the first air inlet so as to distribute airflow in the air duct into each containing cavity. The air flow is blown from the tail part of the battery assembly to the head part of the battery assembly, and meanwhile, the flow equalizing assembly is arranged in the air duct, so that the air quantity entering each accommodating cavity in the air duct is relatively uniform, and the temperature difference among a plurality of battery assemblies is reduced.

Description

Technical Field

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

[0002] Energy storage devices are used to store and release electrical energy. They typically include multiple battery modules, control modules, and other components. The temperature of the battery modules directly impacts their lifespan, charge / discharge efficiency, thermal runaway risk, maintenance costs, and energy management. Therefore, ensuring temperature uniformity across multiple battery modules is crucial. Utility Model Content

[0003] The main technical problem solved by the embodiments of this application is to provide an energy storage device and energy storage system that can effectively reduce the temperature difference between multiple battery modules and improve the heat dissipation effect of the battery modules.

[0004] To address the aforementioned technical problems, one technical solution adopted in this application embodiment is: providing an energy storage device, including: a cabinet, a battery assembly, a fan assembly, and a flow equalization assembly. The cabinet is provided with an air duct and several receiving cavities. Each receiving cavity is used to accommodate the battery assembly, and each receiving cavity has a first air inlet and a first air outlet. The air duct is fluidly connected to the first air inlet of the receiving cavity. The head of the battery assembly is located at the first air outlet of the receiving cavity, and the tail of the battery assembly is located at the first air inlet of the receiving cavity. The fan assembly is disposed within the cabinet and has a second air outlet and a second air inlet. The second air outlet is fluidly connected to the air duct, and the second air inlet is fluidly connected to the first air outlet. The flow equalization assembly is disposed within the air duct and close to the first air inlet, and is used to distribute the airflow in the air duct to each receiving cavity.

[0005] In some embodiments, the flow equalization assembly includes a first flow equalization plate and a plurality of second flow equalization plates. The first flow equalization plate is disposed at a first air inlet, and the plurality of second flow equalization plates are connected to the first flow equalization plate. The first flow equalization plate is provided with a first through hole, and the second flow equalization plate is provided with a second through hole. The first through hole is used to allow a portion of the airflow to enter the receiving cavity, and the second through hole is used to allow the remaining portion of the airflow to continue flowing in the air duct.

[0006] In some embodiments, a plurality of second flow equalizers are vertically connected to the same side of the first flow equalizer, and the plurality of second flow equalizers are arranged at equal intervals along the thickness direction of the second flow equalizer.

[0007] In some embodiments, the area S1 of the first through hole and the area S2 of the first flow equalization plate satisfy: 40% ≤ S1 / S2 ≤ 90%; and / or, the area S3 of the second through hole and the area S4 of the second flow equalization plate satisfy: 40% ≤ S3 / S4 ≤ 90%.

[0008] In some embodiments, the area S1 of the first through hole and the area S2 of the first flow equalization plate satisfy: 60% ≤ S1 / S2 ≤ 80%; and / or, the area S3 of the second through hole and the area S4 of the second flow equalization plate satisfy: 60% ≤ S3 / S4 ≤ 80%.

[0009] In some embodiments, along the thickness direction of the second flow equalization plate, the height L1 of the receiving cavity and the distance L2 between two adjacent second flow equalization plates satisfy the following condition: L2 = 1.5 * L1.

[0010] In some embodiments, the air duct includes a first section and a second section. The first section is located at the top of the receiving cavity and is connected to the second air outlet of the fan assembly. The second section is vertically connected to the first section and is connected to the first air inlet. The flow equalization component is disposed in the second section.

[0011] In some embodiments, the cabinet includes a first side panel and a second side panel arranged opposite to each other along a first direction, a third side panel and a fourth side panel arranged opposite to each other along a second direction, and a top panel and a bottom panel arranged opposite to each other along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; the first side panel, the second side panel, the third side panel and the first flow equalization plate jointly define the boundary of the second section of the air duct, and the second flow equalization plate connects the first side panel, the second side panel, the first flow equalization plate and the third side panel respectively.

[0012] In some embodiments, the fan assembly is disposed on the fourth side plate, the fan assembly is spaced apart from the receiving cavity, the fan assembly includes a baffle, the baffle is disposed between the second air outlet and the air duct, and the baffle is used to block the fluid communication between the second air outlet and the first air outlet.

[0013] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of this application is to provide an energy storage system, including an energy storage device.

[0014] The beneficial effects of this application embodiment are as follows: The energy storage device of this application embodiment includes a cabinet, a fan assembly, a flow equalization assembly, and a battery assembly. The cabinet is provided with an air duct and several receiving cavities. The receiving cavities are used to accommodate the battery assembly. Each receiving cavity has a first air inlet and a first air outlet. The air duct is fluidly connected to the first air inlet of the receiving cavity. The head of the battery assembly is located at the first air outlet of the receiving cavity, and the tail of the battery assembly is located at the first air inlet of the receiving cavity. The fan assembly is disposed in the cabinet and has a second air outlet and a second air inlet. The second air outlet is fluidly connected to the air duct, and the second air inlet is fluidly connected to the first air outlet. The flow equalization assembly is disposed in the air duct and close to the first air inlet. The flow equalization assembly is used to distribute the airflow in the air duct to each receiving cavity. By blowing the airflow from the tail of the battery assembly to the head of the battery assembly, and simultaneously providing the flow equalization assembly in the air duct, the airflow entering each receiving cavity in the air duct is made more uniform, thereby reducing the temperature difference among multiple battery cavities and improving the temperature uniformity of multiple battery cavities. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is an exploded view of the energy storage device according to an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the energy storage device according to an embodiment of this application, omitting the first side plate;

[0018] Figure 3 This is a schematic diagram of the current sharing component in the energy storage device according to an embodiment of this application;

[0019] Figure 4 yes Figure 3 A magnified schematic diagram of part A in the middle. Detailed Implementation

[0020] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0022] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0023] Please see Figure 1 and Figure 2 This application provides an energy storage device 100, which includes a cabinet 10, a battery assembly 40, a fan assembly 20, and a flow equalization assembly 30. The cabinet 10 has an air duct 11 and several receiving cavities 12, which are arranged perpendicular to the ground. Each receiving cavity 12 is used to accommodate the battery assembly 40. Each receiving cavity 12 has a first air inlet 121 and a first air outlet 122. The air duct 11 is in fluid communication with the first air inlet 121 of the receiving cavity 12. The head 41 of the battery assembly 40 is located at the first air outlet 122 of the receiving cavity 12, and the tail 42 of the battery assembly 40 is located at the first air inlet 121 of the receiving cavity 12. The fan assembly 20 is disposed in the cabinet 10 and has a second air outlet 21 and a second air inlet 22. The second air outlet 21 is in fluid communication with the air duct 11, and the second air inlet 22 is in fluid communication with the first air outlet 122. The second air outlet 21 of the fan assembly 20 is used to blow airflow into the air duct 11, and the second air inlet 22 of the fan assembly 20 is used to absorb the airflow blown out from the first air outlet 122 after passing through the receiving cavity 12. The flow equalization assembly 30 is disposed in the air duct 11 and close to the first air inlet 121. The flow equalization assembly 30 is used to divert the airflow in the air duct 11 to each receiving cavity 12.

[0024] The energy storage device 100 of this application dissipates heat from the battery module 40 by blowing airflow from the tail 42 of the battery module 40 to the head 41 of the battery module 40. At the same time, a flow equalization component 30 is provided in the air duct 11 to make the airflow entering each receiving cavity 12 in the air duct 11 more uniform, thereby reducing the temperature difference of multiple battery modules 40 and improving the temperature uniformity of multiple battery modules 40.

[0025] In some embodiments, please refer to Figures 2 to 4 The flow equalization assembly 30 includes a first flow equalization plate 31 and a plurality of second flow equalization plates 32. The first flow equalization plate 31 is disposed at the first air inlet 121, and the plurality of second flow equalization plates 32 are connected to the first flow equalization plate 31. The first flow equalization plate 31 is provided with a first through hole 311, which is used to allow part of the airflow to enter the receiving cavity 12. The second flow equalization plates 32 are provided with second through holes 321, which are used to allow the remaining part of the airflow to continue flowing in the air duct 11.

[0026] As an example, such as Figure 2 As shown, Figure 2The dashed arrows indicate the direction of airflow. When the airflow in the duct 11 reaches the second flow equalization plate 32a, the second flow equalization plate 32a blocks part of the airflow. This blocked airflow then enters the receiving cavity 12a through the first through hole 311. The airflow passing through the second through hole 321 of the second flow equalization plate 32a continues to move in the duct 11 until it reaches the next second flow equalization plate 32b. This second flow equalization plate 32b also blocks part of the airflow. This blocked airflow flows through the first through hole 311 of the first flow equalization plate 31 to the receiving cavities 12b and 12c. The airflow passing through the second through hole 321 of the second flow equalization plate 32b continues to move until it reaches the next second flow equalization plate 32c, and so on. By setting multiple second flow equalization plates 32 on the first flow equalization plate 31, the airflow in the air duct 11 can be divided one by one, so that the airflow in the multiple receiving cavities 12 is more uniform, thereby minimizing the temperature difference between each battery assembly 40.

[0027] In some embodiments, please refer to Figure 2 Several second flow equalization plates 32 are vertically connected to the same side of the first flow equalization plate 31, and are evenly spaced along the thickness direction of the second flow equalization plates 32. The first flow equalization plate 31 is installed at the first air inlet 121 of the receiving cavity 12 in a direction perpendicular to the ground. The multiple second flow equalization plates 32 are vertically connected to the first flow equalization plate 31, so that the extension direction of the second flow equalization plates 32 is approximately perpendicular to the flow direction of the airflow in the air duct 11. The second flow equalization plates 32 have a blocking effect on the airflow, so that when the airflow passes through a second flow equalization plate 32, part of the airflow can pass through the second flow equalization plate 32, while the other part is blocked by the second flow equalization plate 32, thus achieving the purpose of flow diversion. By setting multiple second flow equalization plates 32 on the same side of the first flow equalization plate 31, the part of the airflow blocked by the second flow equalization plate 32 can directly enter the receiving cavity 12 through the first through hole 311, reducing the probability of airflow turbulence caused by the airflow continuing to move in the air duct 11.

[0028] In some embodiments, the area S1 of the first through hole 311 and the area S2 of the first flow equalization plate 31 satisfy: 40% ≤ S1 / S2 ≤ 90%; and / or, the area S3 of the second through hole 321 and the area S4 of the second flow equalization plate 32 satisfy: 40% ≤ S3 / S4 ≤ 90%. By controlling the ratio of the opening area of ​​the first through hole 311 to the area of ​​the first flow equalization plate 31 within the above range, the first flow equalization plate 31 can have the function of rapid ventilation, reducing the probability that the airflow blocked by the second flow equalization plate 32 will remain in the air duct 11; by controlling the ratio of the opening area of ​​the second through hole 321 to the area of ​​the second flow equalization plate 32 within the above range, the second flow equalization plate 32 can both block part of the airflow and allow part of the airflow to pass through, thereby making the airflow in each receiving cavity 12 approximately uniform.

[0029] In some embodiments, the area S1 of the first through hole 311 and the area S2 of the first flow equalization plate 31 satisfy: 60% ≤ S1 / S2 ≤ 80%; and / or, the area S3 of the second through hole 321 and the area S4 of the second flow equalization plate 32 satisfy: 60% ≤ S3 / S4 ≤ 80%.

[0030] In some embodiments, please refer to Figure 2 Along the thickness direction of the second flow equalization plate 32, the height L1 of the receiving cavity 12 and the distance L2 between two adjacent second flow equalization plates 32 satisfy the following condition: L2 = 1.5 * L1. That is, the interval between two adjacent second flow equalization plates 32 is 1.5 times the height of the receiving cavity 12.

[0031] As an example, there are five receiving cavities 12, which are stacked vertically to the ground. From the top to the bottom of the energy storage device 100, the five receiving cavities 12 are sequentially labeled as receiving cavity 12a, receiving cavity 12b, receiving cavity 12c, receiving cavity 12d, and receiving cavity 12e. There is one first flow equalization plate 31 and three second flow equalization plates 32. From the top to the bottom of the energy storage device 100, the three second flow equalization plates 32 are sequentially labeled as second flow equalization plate 32a, second flow equalization plate 32b, and second flow equalization plate 32c. The second flow equalization plate 32a is located in the middle of receiving cavity 12a, the second flow equalization plate 32b is located between receiving cavities 12b and 12c, and the second flow equalization plate 32c is located in the middle of receiving cavity 12d. When the airflow in the duct 11 reaches the second flow equalization plate 32a, it has a high velocity due to the lack of obstruction. Most of the airflow can pass directly through the second flow equalization plate 32a, while a small portion is blocked by the second flow equalization plate 32a and flows from the first through hole 311 to the receiving cavity 12a. Part of the airflow passing through the second flow equalization plate 32a is blocked by the second flow equalization plate 32b and flows from the first through hole 311 to the receiving cavity 12b. The remaining airflow continues to pass through the second flow equalization plate 32b. After passing through the second flow equalization plate 32b, the airflow velocity decreases to some extent. Therefore, some airflow flows through the first through hole 311 to the receiving cavity 12c, and some airflow is blocked by the second flow equalization plate 32c and flows through the first through hole 311 to the receiving cavity 12d. The remaining gas continues to pass through the second flow equalization plate 32c and eventually flows to the receiving cavity 12e. Of course, the direction of airflow is not absolute. For example, the airflow flowing to the containment cavity 12a is not necessarily all flowing to the containment cavity 12a. There may also be a situation where part of the gas flows to the containment cavity 12b or the containment cavity 12c.

[0032] It is worth noting that in other embodiments, when the number of receiving cavities 12 increases or decreases, the number of second flow equalization plates 32 can also be appropriately increased, decreased or kept unchanged, and the ratio between the distance between two adjacent second flow equalization plates 32 and the height of the receiving cavity 12 can also be appropriately adjusted.

[0033] In some embodiments, please refer to Figure 1 and Figure 2The air duct 11 includes a first section 111 and a second section 112. The first section 111 is located at the top of the receiving cavity 12 and is connected to the second air outlet 21 of the fan assembly 20. The second section 112 is vertically connected to the first section 111 and is connected to the first air inlet 121. The flow equalization assembly 30 is disposed in the second section 112. Compared to the structure where the fan assembly 20 is directly placed at the tail 42 of the battery assembly 40, the second air outlet 21 of the fan assembly 20 has a limited air outlet range and cannot directly cover all the receiving cavities 12. Therefore, this embodiment of the application sets a first section 111 at the top of the receiving cavity 12 and a second section 112 at the first air inlet 121 of the receiving cavity 12, and sets a flow equalization component 30 in the second section 112. On the one hand, it can change the flow direction of the airflow. During operation, the head 41 of the battery assembly 40 has structures such as the output end, and the head 41 has more heat. Blowing the airflow from the tail 42 of the battery assembly 40 to the head 41 of the battery assembly 40 is beneficial to directly blow the heat of the head 41 of the battery assembly 40 out of the receiving cavity 12, so as to achieve rapid heat dissipation. On the other hand, it is beneficial to install the flow equalization component 30 in the second section 112 of the air duct 11, so that the airflow can be more evenly distributed to each receiving cavity 12, thereby making the heat dissipation effect of each battery assembly 40 comparable.

[0034] In some embodiments, please refer to Figure 1 and Figure 2 The cabinet 10 includes a first side panel 13 and a second side panel 14 arranged opposite each other along a first direction, a third side panel 15 and a fourth side panel 16 arranged opposite each other along a second direction, and a top panel 17 and a bottom panel 18 arranged opposite each other along a third direction. The first, second, and third directions are all perpendicular to each other. The first side panel 13, the second side panel 14, the third side panel 15, and the first flow equalization plate 31 together define the boundary of the second section 112 of the air duct 11. The second flow equalization plate 32 connects the first side panel 13, the second side panel 14, the first flow equalization plate 31, and the third side panel 15. Through this structure, on the one hand, multiple side panels are directly spliced ​​with the first flow equalization plate 31 and the second flow equalization plate 32, reducing sheet metal usage and lowering production costs; on the other hand, the flow equalization assembly 30 can directly fill the cross-section of the second section 112 of the air duct 11, allowing for a more uniform distribution of airflow within the air duct 11.

[0035] In some embodiments, please refer to Figure 2The fan assembly 20 is disposed on the fourth side plate 16, and the fan assembly 20 is spaced apart from the receiving cavity 12, so that there is a gap between the fan assembly 20 and the battery assembly 40 to accommodate the gas blown out from the receiving cavity 12. The fan assembly 20 includes a baffle 23, which is disposed between the second air outlet 21 and the air duct 11. The baffle 23 is used to block the fluid communication between the second air outlet 21 and the first air outlet 122, so that most of the airflow blown out from the second air outlet 21 can flow in the air duct 11, reducing the direct flow of airflow from the second air outlet 21 to the second air inlet 22.

[0036] This application also provides an embodiment of an energy storage system, which includes an energy storage device 100. The structure and function of the energy storage device 100 can be found in any of the above embodiments, and will not be repeated here.

[0037] The energy storage device 100 of this application embodiment includes a cabinet 10, a fan assembly 20, a flow equalization assembly 30, and a battery assembly 40. The cabinet 10 is provided with an air duct 11 and several receiving cavities 12. The receiving cavities 12 are used to accommodate the battery assembly 40. The receiving cavities 12 are provided with a first air inlet 121 and a first air outlet 122. The air duct 11 is in fluid communication with the first air inlet 121 of the receiving cavity 12. The head 41 of the battery assembly 40 is located at the first air outlet 122 of the receiving cavity 12, and the tail 42 of the battery assembly 40 is located at the first air inlet 121 of the receiving cavity 12. The fan assembly 20 is disposed in the cabinet 10. The fan assembly 20 is provided with a second air outlet 21 and a second air inlet 22. The second air outlet 21 is in fluid communication with the air duct 11, and the second air inlet 22 is in fluid communication with the first air outlet 122. The flow equalization component 30 is disposed within the air duct 11 and near the first air inlet 121. The flow equalization component 30 is used to distribute the airflow in the air duct 11 to each receiving cavity 12. By blowing the airflow from the tail 42 of the battery assembly 40 to the head 41 of the battery assembly 40, and simultaneously distributing the flow equalization component 30 in the air duct 11, the airflow entering each receiving cavity 12 in the air duct 11 is made more uniform, thereby reducing the temperature difference among the multiple battery assemblies 40 and improving the temperature uniformity of the multiple battery assemblies 40.

[0038] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An energy storage device, characterized by, The energy storage device comprises: a cabinet and a battery assembly, the cabinet is provided with an air duct and a plurality of receiving cavities for accommodating the battery assembly, the receiving cavities are provided with a first air inlet and a first air outlet, the air duct is in fluid communication with the first air inlet of the receiving cavities, the head of the battery assembly is located at the first air outlet of the receiving cavities, and the tail of the battery assembly is located at the first air inlet of the receiving cavities; a fan assembly arranged in the cabinet, the fan assembly is provided with a second air outlet and a second air inlet, the second air outlet is in fluid communication with the air duct, and the second air inlet is in fluid communication with the first air outlet; a flow equalization assembly arranged in the air duct and close to the first air inlet, the flow equalization assembly is used for dividing the airflow in the air duct into each receiving cavity.

2. The energy storage device according to claim 1, wherein the flow equalization assembly comprises a first flow equalization plate and a plurality of second flow equalization plates, the first flow equalization plate is arranged at the first air inlet, and the plurality of second flow equalization plates are connected to the first flow equalization plate; the first flow equalization plate is provided with a first through hole, and the second flow equalization plate is provided with a second through hole, the first through hole is used for allowing part of the airflow to enter the receiving cavities, and the second through hole is used for allowing the remaining part of the airflow to continue to flow in the air duct.

3. The energy storage device according to claim 2, wherein the plurality of second flow equalization plates are all connected to the same side of the first flow equalization plate perpendicularly, and the plurality of second flow equalization plates are arranged at equal intervals along the thickness direction of the second flow equalization plates.

4. The energy storage device according to claim 3, wherein the area S1 of the first through hole and the area S2 of the first flow equalization plate satisfy 40%≤S1 / S2≤90%; and / or the area S3 of the second through hole and the area S4 of the second flow equalization plate satisfy 40%≤S3 / S4≤90%.

5. The energy storage device according to claim 4, wherein the area S1 of the first through hole and the area S2 of the first flow equalization plate satisfy 60%≤S1 / S2≤80%; and / or the area S3 of the second through hole and the area S4 of the second flow equalization plate satisfy 60%≤S3 / S4≤80%.

6. The energy storage device according to claim 3, wherein along the thickness direction of the second flow equalization plate, the height L1 of the receiving cavities and the spacing L2 between adjacent two second flow equalization plates satisfy L2=1.5*L1.

7. The energy storage device according to claim 1, wherein the air duct comprises a first section and a second section, the first section is located at the top of the receiving cavities, the first section is in communication with the second air outlet of the fan assembly, the second section is connected to the first section perpendicularly, the second section is in communication with the first air inlet, and the flow equalization assembly is arranged in the second section.

8. The energy storage device according to claim 2, wherein The cabinet body comprises a first side plate and a second side plate oppositely arranged along a first direction, a third side plate and a fourth side plate oppositely arranged along a second direction, and a top plate and a bottom plate oppositely arranged along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; The first side plate, the second side plate, the third side plate and the first flow uniform plate jointly define the boundary of the second section of the air duct, and the second flow uniform plate is connected to the first side plate, the second side plate, the first flow uniform plate and the third side plate respectively.

9. The energy storage device of claim 8, wherein The fan assembly is arranged on the fourth side plate, and the fan assembly is arranged in a spaced manner with the receiving cavity. The fan assembly comprises a baffle plate arranged between the second air outlet and the air duct. The baffle plate is used to block the fluid communication between the second air outlet and the first air outlet.

10. An energy storage system characterized by, An energy storage device comprising any one of claims 1-9.

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