Energy storage cabinets and outdoor energy storage equipment

Abstract

The utility model relates to an energy storage cabinet and an outdoor energy storage device. The outdoor energy storage device comprises an energy storage cabinet. By arranging end covers above the circumferential surrounding walls, adding top covers on the end covers, adding reinforcing ribs between the top cover and the end covers, and arranging heat-insulating parts in each isolation area surrounded by the reinforcing ribs, on the one hand, the top of the product is reliably reinforced to avoid deformation damage and increase of the matching gap, thereby ensuring normal sealing protection; on the other hand, the heat transfer between the top cover and the end cover is isolated by the arrangement of the heat-insulating parts, so that even if the top cover is heated due to direct sunlight, the heat will not be directly transferred to the end cover, thereby avoiding further transfer of heat to the inside of the cabinet, so that the product does not need to adjust the temperature for a long time to balance the heat flowing in from the top, thereby effectively reducing energy consumption; since the direct and large-scale transfer of heat from the top to the inside of the cabinet is avoided, the electronic components of the cabinet can be prevented from aging rapidly due to excessive temperature, thereby effectively improving the durability of the product.

Description

Technical Field

[0001] The utility model relates to the field of energy storage, in particular to an energy storage cabinet and outdoor energy storage equipment. Background Art

[0002] Energy storage equipment plays a very important role in energy conversion and energy storage. Moreover, with the popularization of renewable energy and the development of smart grids, energy storage equipment has been enriched in functions, its application scenarios have been broadened, and it has become more adaptable to different electricity products.

[0003] Energy storage equipment usually has multiple energy storage units, inverters, charge controllers, battery management modules, cooling systems and other functional devices in the energy storage cabinet. However, energy storage cabinets still have certain shortcomings in practical applications:

[0004] For example, the durability of the cabinet's top cover is poor, and it is easy to corrode or wear during use, resulting in the failure of the top cover's protection, and thus the failure of waterproofing. For another example, if the product is placed outdoors, the top cover will be exposed to direct sunlight for a long time, causing the heat of the top cover to rise abnormally, causing the heat to be continuously transferred to the inside of the cabinet through the top cover, so that the cooling system inside the cabinet needs to maintain high power operation to balance the influx of heat, which in turn leads to high energy consumption of the product. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an energy storage cabinet and an outdoor energy storage device, which can solve the problems of poor durability and excessive energy consumption.

[0006] The first aspect of the utility model provides an energy storage cabinet, which includes:

[0007] A cabinet body, wherein a circumferential wall is arranged in the circumferential direction of the cabinet body;

[0008] A cover assembly, the cover assembly comprising an end cover disposed above the cabinet, a top cover disposed above the end cover, and a plurality of reinforcing ribs disposed on the top cover, the end cover shielding the opening above the circumferential surrounding wall, each of the reinforcing ribs being located between the end cover and the top cover, and each of the reinforcing ribs defining a plurality of isolation areas on the top cover; and

[0009] The heat preservation component comprises a plurality of heat preservation parts, and each of the heat preservation parts is arranged in each of the isolation areas in a one-to-one correspondence.

[0010] Preferably, the circumferential wall is an integrally formed structure; or

[0011] The circumferential wall and the end cover are an integrally formed structure.

[0012] Preferably, the cover assembly includes two reinforcing ribs, the two reinforcing ribs cross each other, and the two reinforcing ribs define four isolation areas on the top cover, and the thermal insulation component is arranged in each isolation area.

[0013] Preferably, each peripheral edge of the top cover is bent in the same direction to form a plurality of lips, and each of the lips surrounds an isolation cavity;

[0014] Some of the reinforcing ribs are arranged one by one on the inner side walls of each of the lips, and the remaining reinforcing ribs are located in the isolation cavity, and each of the reinforcing ribs divides the isolation cavity into a plurality of isolation areas.

[0015] Preferably, the two reinforcing ribs are an integrally formed structure, and the cross-section of each reinforcing rib is U-shaped.

[0016] Preferably, a plurality of top hanging holes are provided on the top cover;

[0017] The energy storage cabinet further includes a lifting assembly, which includes a plurality of lifting holes, each of which is located on each of the reinforcing ribs, and each of the lifting holes is aligned and connected with each of the top lifting holes in a one-to-one correspondence.

[0018] Preferably, the lifting assembly includes a plurality of lifting ears, each of the lifting ears is used to penetrate each of the top hanging holes in a one-to-one correspondence, and each of the lifting ears is used to be installed in each of the lifting holes in a one-to-one correspondence.

[0019] Preferably, the thermal insulation member comprises glass wool, mineral wool, polyester fiber, polyurethane foam or polystyrene board; or

[0020] A protective layer is arranged on the outer side of the top cover.

[0021] Preferably, the cabinet further comprises a base and a bracket arranged on the base, the circumferential wall is arranged around the outer side of the circumference of the bracket, and the end cover is arranged above the bracket.

[0022] The second aspect of the utility model further provides an outdoor energy storage device, which includes the energy storage cabinet described in any one of the above technical solutions, and the outdoor energy storage device includes a heat dissipation system, a control system and a plurality of energy storage units;

[0023] Each of the energy storage units is disposed in the cabinet, the heat dissipation system and the control system are respectively disposed on the cabinet, the heat dissipation system is used to adjust the temperature in the cabinet, and the control system is electrically connected to each of the energy storage units.

[0024] The implementation of this utility model has the following beneficial effects:

[0025] The utility model relates to an energy storage cabinet and an outdoor energy storage device. The outdoor energy storage device comprises an energy storage cabinet. By arranging an end cover above a circumferential wall, adding a top cover on the end cover, adding reinforcing ribs between the top cover and the end cover, and arranging a heat preservation member in each isolation area surrounded by the reinforcing ribs, on the one hand, the top of the product is reliably reinforced to avoid deformation damage and increase of the matching gap, thereby ensuring normal sealing protection. On the other hand, the heat transfer between the top cover and the end cover is isolated by the arrangement of the heat preservation member, so that even if the top cover is heated due to direct sunlight, the heat will not be directly transferred to the end cover, thereby avoiding further transfer of the heat to the inside of the cabinet, so that the product does not need to adjust the temperature for a long time to balance the heat flowing in from the top, thereby effectively reducing energy consumption.

[0026] In addition, since the heat is prevented from being directly transferred from the top to the inside of the cabinet, it can also prevent the electronic components of the cabinet from aging faster due to excessive temperature, effectively improving the durability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0028] Figure 1 It is a schematic diagram of the structure of an outdoor energy storage device in some embodiments of the utility model;

[0029] Figure 2 It is a partial structural schematic diagram of the energy storage cabinet in some embodiments of the utility model. DETAILED DESCRIPTION

[0030] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0031] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 invention.

[0033] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] Figure 1 The energy storage cabinet 10 in some embodiments of the utility model is shown, and the energy storage cabinet 10 plays the role of providing an installation position and providing a storage space. The energy storage cabinet 10 includes a cabinet body 1, a cover assembly 2 and a heat preservation assembly 3. The cabinet body 1 plays the role of main body support, the cover assembly 2 is used to shield the upper part of the cabinet body 1, and the heat preservation assembly 3 plays the role of heat insulation.

[0035] like Figure 1 As shown, a circumferential wall 11 is provided in the circumferential direction of the cabinet 1 ; it can be understood that the circumferential wall 11 is used to shield the cabinet 1 in all directions around the cabinet 1 , so as to protect the components and parts arranged in the cabinet 1 .

[0036] like Figure 1 and Figure 2As shown, the cover assembly 2 includes an end cover 21 arranged above the cabinet body 1, a top cover 22 arranged above the end cover 21, and a plurality of reinforcing ribs 23 arranged on the top cover 22. The end cover 21 covers the opening above the circumferential wall 11, and each reinforcing rib 23 is located between the end cover 21 and the top cover 22. Each reinforcing rib 23 defines a plurality of isolation areas 2221 on the top cover 22; the insulation assembly 3 includes a plurality of insulation parts 31, and each insulation part 31 is arranged one by one in each isolation area 2221.

[0037] It can be understood that the end cover 21 is used to shield the top of the corresponding cabinet 1, the top cover 22 is used to shield the top of the end cover 21, the reinforcing ribs 23 are used to structurally reinforce the top cover 22, and the isolation area 2221 is used to accommodate the insulation component 31, and the insulation component 31 is used to block the heat exchange between the end cover 21 and the top cover 22.

[0038] It should be noted that, on the one hand, the spacing between the end cover 21 and the top cover 22 prevents heat from being directly transferred to the end cover 21 through the top cover 22; on the other hand, the thermal insulation components 31 arranged between the end cover 21 and the top cover 22 can further play a role in thermal insulation; the working effects of both aspects effectively block the heat transfer from the top cover 22 to the inside of the cabinet 1, and prevent the heat dissipation mechanism or heat exchange mechanism arranged in the energy storage cabinet 10 from working for a long time due to excessively high temperature, thereby effectively reducing the energy consumption of the product.

[0039] It should also be noted that since reinforcing ribs 23 are provided on the top cover 22 for reinforcement, the top cover 22 exposed to the outside can be prevented from unexpected deformation, thereby ensuring that the fitting clearance between the top cover and other components will not increase due to deformation, thereby ensuring the sealing of the fitting connection position and ensuring that the product has a high level of protection.

[0040] Furthermore, since the top cover 22 and the end cover 21 jointly shield the top of the cabinet 1, they play a front-and-rear protective role. Even if the top cover 22, which is an exposed part, is worn or deformed, the end cover 21, which is closer to the top of the cabinet body 1, still shields and isolates the top of the cabinet 1, thereby ensuring the protection of the product.

[0041] It should be further explained that the size specifications of each isolation area 2221 can be configured to be equal or unequal. Of course, when the setting positions of each reinforcement rib 23 are different, the contours of each isolation area 2221 will also be different, and the size specifications and shape contours of each corresponding insulation member 31 will also be different. Preferably, the contour shape of each insulation member 31 is adapted to the contour of the corresponding isolation area 2221, that is, the space of each isolation area 2221 is fully filled with insulation members 31, so that effective heat isolation is achieved at different positions, further reducing the energy consumption cost of the product in temperature regulation, and further avoiding accelerated aging of internal components of the product due to excessive temperature.

[0042] Furthermore, the heat-insulating member 31 can be any component or structure that can play a heat-insulating role in the prior art, that is, the heat-insulating member 31 can be configured to be made of any material that can play a heat-insulating role in the prior art, as long as the heat-insulating member 31 can effectively isolate the temperature of both sides at the setting position. Of course, the thickness of the heat-insulating member 31 can be flexibly set according to the requirements of the material and the temperature isolation requirements.

[0043] like Figure 1 As shown, in some embodiments of the energy storage cabinet 10, the circumferential wall 11 is an integrally formed structure. Specifically, a whole piece of metal plate can be cut, and then the metal plate with excess scraps cut off can be bent so that the metal plate is arranged in a cylindrical shape. In this way, the sealing performance of the corners of the circumferential wall 11 in the circumferential direction can be improved to prevent pollutants from penetrating from the corners of the circumferential wall 11.

[0044] like Figure 1 As shown, in some embodiments of the energy storage cabinet 10 , the circumferential wall 11 and the end cover 21 are an integrally formed structure.

[0045] It can be understood that the circumferential wall 11 and the end cover 21 in this embodiment are made of the same metal plate through cutting and bending; in this way, in addition to protecting the corners of the circumferential wall 11, the direct connection position between the circumferential wall 11 and the end cover 21 can also be sealed to a certain extent.

[0046] like Figure 2 As shown, in some embodiments of the energy storage cabinet 10 , the cover assembly 2 includes two reinforcing ribs 23 , which cross each other. The two reinforcing ribs 23 define four isolation areas 2221 on the top cover 22 , and a thermal insulation member 31 is disposed in each isolation area 2221 .

[0047] It is understandable that the angle at which the reinforcing ribs 23 intersect can be flexibly set, for example, the angle at which the reinforcing ribs 23 intersect can be configured to be 45°, 60°, 30°, 90° or various angles. A heat preservation member 31 is disposed in each isolation area 2221 .

[0048] Preferably, the two reinforcing ribs 23 intersect at 90°.

[0049] like Figure 1 and Figure 2 As shown, in some embodiments of the energy storage cabinet 10, each peripheral edge of the top cover 22 is bent in the same direction to form a plurality of lips 221, and each lip 221 surrounds an isolation cavity 222;

[0050] Some of the reinforcing ribs 23 are disposed one by one on the inner side walls of each lip edge 221 , and the remaining reinforcing ribs 23 are located in the isolation cavity 222 . Each reinforcing rib 23 divides the isolation cavity 222 into a plurality of isolation areas 2221 .

[0051] It is understandable that each lip 221 can be configured to be formed by bending once from the peripheral edge portion of the top cover 22, or can be configured to be formed by bending twice, three times, four times or more than four times. Further, the number of bends of the lips 221 at different positions can be configured to be the same or different.

[0052] It should be noted that the bent lip 221 is arranged at a certain angle to the top cover 22, and a reinforcing rib 23 is arranged on the inner side of each lip 221, so that the lip 221 can be prevented from being deformed due to being held against the end cover 21, thereby improving durability. In particular, if the lip 221 is configured to be sealed by being held against the end cover 21, the reinforcement of the lip 221 by the reinforcing rib 23 can ensure the sealing between the lip and the end cover 21.

[0053] Preferably, two adjacent lips 221 are configured to abut against each other or be welded to each other, and it is preferred to ensure the sealing between the lips 221 .

[0054] like Figure 2 As shown, in some embodiments of the energy storage cabinet 10 , the two reinforcing ribs 23 are an integrally formed structure, and the cross-section of each reinforcing rib 23 is U-shaped.

[0055] It is understandable that cutting, bending and the like can be performed on a metal sheet to simultaneously form two reinforcing ribs 23 .

[0056] It is also understandable that the U-shaped reinforcement ribs 23 can reduce weight to a certain extent, avoiding deformation of the top cover 22 and the end cover 21 due to excessive weight of the reinforcement ribs 23 themselves, while at the same time providing sufficient mechanical strength.

[0057] like Figure 1 and Figure 2 As shown, in some embodiments of the energy storage cabinet 10, a plurality of top hanging holes 223 are provided on the top cover 22;

[0058] The energy storage cabinet 10 further includes a lifting assembly 4 , which includes a plurality of lifting holes, each of which is located on each reinforcing rib 23 , and each of which is aligned and connected with each of the top lifting holes 223 in a one-to-one correspondence.

[0059] It can be understood that the number of top hanging holes 223 is equal to the number of lifting holes. When the energy storage cabinet 10 needs to be hoisted, the lifting equipment can be correspondingly inserted and installed in the top hanging holes 223 and the lifting holes. The lifting holes are arranged on the reinforcing ribs 23, and the lifting force points can be placed on the reinforcing ribs 23 with higher strength, avoiding hoisting deformation at other positions during hoisting.

[0060] Furthermore, if a frame is provided inside the cabinet 1, and the frame is configured to be connected by a plurality of rods, the reinforcing ribs 23 can be further directly connected to the frame, so that the force during hoisting is concentrated on the reinforcing ribs 23 and the frame, avoiding deformation of other parts with weaker strength. Figure 1 As shown, in some embodiments of the energy storage cabinet 10, the lifting assembly 4 includes a plurality of lifting ears 42, each lifting ear 42 is used to penetrate each top lifting hole 223 in a one-to-one correspondence, and each lifting ear 42 is used to be installed in each lifting hole in a one-to-one correspondence.

[0061] It can be understood that the lifting ear 42 and the lifting hole can be configured to be detachably connected or fixedly connected, and the detachable connection method includes a threaded connection, a snap connection or other detachable connection methods that are reliable for lifting in the prior art.

[0062] In some embodiments, a lifting ring may be used instead of the lifting ear 42 to perform a product lifting operation.

[0063] Specifically, in some embodiments of the energy storage cabinet 10, the thermal insulation member 31 includes glass wool, mineral wool, polyester fiber, polyurethane foam or polystyrene board. It is understandable that the thermal insulation member 31 made of the corresponding material can be selected based on comprehensive considerations such as actual application requirements, design requirements and production costs.

[0064] Preferably, a protective layer is provided on the outer side of the top cover 22 .

[0065] It can be understood that the outer side of the top cover 22 refers to the side exposed to the outside of the product, and the protective layer can be made of various materials in the prior art that can play a rust-proof and / or heat-insulating role.

[0066] like Figure 1 As shown, in some embodiments of the energy storage cabinet 10, the cabinet body 1 also includes a base 12 and a bracket (not shown) arranged on the base 12, the circumferential wall 11 is arranged around the outer side of the periphery of the bracket, and the end cover 21 is arranged above the bracket.

[0067] It can be understood that the bracket can be configured to be connected by a plurality of connecting rods, and the bracket plays a major role in bearing the weight. The base 12 is used to support the bracket from the bottom.

[0068] Figure 1The outdoor energy storage device 1a in some embodiments of the utility model is shown. The outdoor energy storage device 1a includes an energy storage cabinet 10. The outdoor energy storage device also includes a heat dissipation system, a control system and a plurality of energy storage units.

[0069] Each energy storage unit is arranged in the cabinet 1, and the heat dissipation system and the control system are respectively arranged on the cabinet 1. The heat dissipation system is used to adjust the temperature in the cabinet 1, and the control system 20 is electrically connected to each energy storage unit.

[0070] It can be understood that the heat dissipation system is a prior art, which is used to adjust the internal temperature of the cabinet 1 to ensure that the temperature is suitable for the product to work. The control system is used to monitor the working conditions of each energy storage unit and the corresponding device. The control system 20 includes a plurality of display lights 30 arranged on the cabinet 1. The energy storage unit is used to store electrical energy, and each energy storage unit is connected and conducted according to the design.

[0071] The implementation of this utility model has the following beneficial effects:

[0072] The utility model relates to an energy storage cabinet and an outdoor energy storage device. The outdoor energy storage device comprises an energy storage cabinet. By arranging an end cover above a circumferential wall, adding a top cover on the end cover, adding reinforcing ribs between the top cover and the end cover, and arranging a heat preservation member in each isolation area surrounded by the reinforcing ribs, on the one hand, the top of the product is reliably reinforced to avoid deformation damage and increase of the matching gap, thereby ensuring normal sealing protection. On the other hand, the heat transfer between the top cover and the end cover is isolated by the arrangement of the heat preservation member, so that even if the top cover is heated due to direct sunlight, the heat will not be directly transferred to the end cover, thereby avoiding further transfer of the heat to the inside of the cabinet, so that the product does not need to adjust the temperature for a long time to balance the heat flowing in from the top, thereby effectively reducing energy consumption.

[0073] In addition, since the heat is prevented from being directly transferred from the top to the inside of the cabinet, it can also prevent the electronic components of the cabinet from aging faster due to excessive temperature, effectively improving the durability of the product.

[0074] The scheme of the utility model has been described in detail above with reference to the accompanying drawings. In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. Those skilled in the art should also know that the actions and modules involved in the specification are not necessarily required for the utility model. In addition, it can be understood that the steps in the method of the embodiment of the utility model can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the utility model can be merged, divided and deleted according to actual needs.

[0075] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An energy storage cabinet, characterized in that: include: A cabinet body, wherein a circumferential wall is arranged in the circumferential direction of the cabinet body; A cover assembly, the cover assembly comprising an end cover disposed above the cabinet, a top cover disposed above the end cover, and a plurality of reinforcing ribs disposed on the top cover, the end cover shielding the opening above the circumferential surrounding wall, each of the reinforcing ribs being located between the end cover and the top cover, and each of the reinforcing ribs defining a plurality of isolation areas on the top cover; and The heat preservation component comprises a plurality of heat preservation parts, and each of the heat preservation parts is arranged in each of the isolation areas in a one-to-one correspondence.

2. The energy storage cabinet according to claim 1, characterized in that: The circumferential wall is an integrally formed structure; or The circumferential wall and the end cover are an integrally formed structure.

3. The energy storage cabinet according to claim 1, characterized in that: The cover assembly includes two reinforcing ribs, the two reinforcing ribs cross each other, and the two reinforcing ribs define four isolation areas on the top cover, and the thermal insulation component is arranged in each isolation area.

4. The energy storage cabinet according to claim 1 or 3, characterized in that: Each peripheral edge of the top cover is bent in the same direction to form a plurality of lips, and each of the lips surrounds an isolation cavity; Some of the reinforcing ribs are arranged one by one on the inner side walls of each of the lips, and the remaining reinforcing ribs are located in the isolation cavity, and each of the reinforcing ribs divides the isolation cavity into a plurality of isolation areas.

5. The energy storage cabinet according to claim 3, characterized in that: The two reinforcing ribs are an integrally formed structure, and the cross section of each reinforcing rib is U-shaped.

6. The energy storage cabinet according to claim 1 or 3, characterized in that: The top cover is provided with a plurality of top hanging holes; The energy storage cabinet further includes a lifting assembly, which includes a plurality of lifting holes, each of which is located on each of the reinforcing ribs, and each of the lifting holes is aligned and connected with each of the top lifting holes in a one-to-one correspondence.

7. The energy storage cabinet according to claim 6, characterized in that: The hanging assembly includes a plurality of hanging ears, each of which is used to penetrate each of the top hanging holes in a one-to-one correspondence, and each of the hanging ears is used to be installed in each of the hanging holes in a one-to-one correspondence.

8. The energy storage cabinet according to claim 1, characterized in that: The thermal insulation member comprises glass wool, mineral wool, polyester fiber, polyurethane foam or polystyrene board; or A protective layer is arranged on the outer side of the top cover.

9. The energy storage cabinet according to claim 1, characterized in that: The cabinet also includes a base and a bracket arranged on the base, the circumferential wall is arranged around the outer side of the peripheral edge of the bracket, and the end cover is arranged above the bracket.

10. An outdoor energy storage device, characterized in that: An energy storage cabinet comprising any one of claims 1 to 9, wherein the outdoor energy storage device comprises a heat dissipation system, a control system and a plurality of energy storage units; Each of the energy storage units is disposed in the cabinet, the heat dissipation system and the control system are respectively disposed on the cabinet, the heat dissipation system is used to adjust the temperature in the cabinet, and the control system is electrically connected to each of the energy storage units.

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