Energy storage system

Abstract

The utility model relates to an energy storage system, which comprises a battery rack body, the battery rack body comprises a plurality of liquid cooling assemblies stacked in sequence, each liquid cooling assembly comprises a liquid cooling plate, four corners of the bottom of each liquid cooling plate are respectively and fixedly connected with a support stand column, and the top edge of each liquid cooling plate is connected with a fence; the battery pack comprises a plurality of batteries which are sequentially arranged in the liquid cooling assembly in an array mode, the bottom of each battery exchanges heat with the liquid cooling plate, and the battery pack is limited in the space formed by the enclosure. A plurality of battery rack bodies are fixedly arranged in the box body, and the plurality of battery rack bodies are arranged in the box body in an array manner and are fixedly connected with the bottom of the box body. The battery pack does not need to be manufactured into a battery pack structure, and when the battery pack is assembled and used, the battery rack body, the battery pack and the box body are transported to a site in a spare part state and then are installed on site, so that the design requirement of a product on the strength in transportation is reduced, the energy density of an energy storage system is improved, and the production cost is reduced.

Description

Technical Field

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

[0002] Battery Energy Storage System (BESS) is a system that uses secondary batteries as energy storage carriers to store and supply electrical energy for a certain period of time. The electrical energy it provides has functions such as smooth transition, peak shaving and valley filling, and frequency and voltage regulation.

[0003] Current energy storage systems include common forms such as energy storage containers and energy storage cabinets, which are generally composed of a box, a battery cluster rack, and battery packs installed on the battery cluster rack. In existing transportation methods, energy storage systems are generally assembled in the factory and then transported to the destination as a whole. Due to factors such as the shaking and vibration of the box during transportation, the overall structural strength requirements of the system are relatively high, so more structural parts are required to meet the strength design requirements. For example, the battery pack needs to be assembled on the box of the battery pack. Therefore, due to its transportation requirements, the existing energy storage system uses more structural parts, which in turn leads to an increase in manufacturing costs. At the same time, due to the large number of structural parts occupying space, the energy density of the energy storage system cannot be further improved. Summary of the invention

[0004] The embodiment of the present application provides an energy storage system to solve the problems of low integration, high component cost and low energy density of energy storage containers in the related art.

[0005] The present application provides an energy storage system, including:

[0006] A battery frame, wherein the battery frame comprises a plurality of liquid cooling components stacked in sequence, wherein the liquid cooling components comprise a liquid cooling plate arranged in a horizontal direction, wherein the four bottom corners of the liquid cooling plate are respectively fixedly connected to support columns, and the top edge of the liquid cooling plate is connected to a fence;

[0007] A battery pack, the battery pack comprising a plurality of batteries arranged in an array in sequence in a liquid cooling assembly, the bottom of each battery exchanging heat with the liquid cooling plate, the battery pack being constrained in a space formed by the enclosure to limit expansion of the battery pack;

[0008] A box body, wherein a plurality of the battery racks are fixedly arranged in the box body, the plurality of the battery racks are arranged in an array in the box body and are fixedly connected to the bottom of the box body.

[0009] In some embodiments: the liquid cooling plate is a rectangular plate structure, a plurality of fluid channels are provided in the liquid cooling plate, a cooling liquid inlet connected to the fluid channel is provided at one end of the liquid cooling plate, and a cooling liquid outlet connected to the fluid channel is provided at the other end of the liquid cooling plate;

[0010] The two adjacent layers of liquid cooling plates are connected via a cooling liquid pipeline, one end of the cooling liquid pipeline is connected to the cooling liquid outlet of the lower layer of the liquid cooling plate, and the other end of the cooling liquid pipeline is connected to the cooling liquid inlet of the upper layer of the liquid cooling plate.

[0011] In some embodiments: the bottom of the support column is a hollow structure with an opening at the bottom, and positioning protrusions are fixedly connected to the four corners of the top of the liquid cooling plate, and the projections of the positioning protrusions and the support column in the vertical direction overlap with each other.

[0012] In some embodiments: a guide piece is provided on the top of the positioning protrusion, and the guide piece is a spherical structure or a conical structure. A fastener connected to the positioning protrusion is connected to the support column. The enclosure includes two longitudinal beams that are parallel to each other and spaced apart, and two cross beams that are parallel to each other and spaced apart, and the ends of the longitudinal beams and the cross beams are fixedly connected to the positioning protrusion.

[0013] In some embodiments: the top of the liquid cooling plate is coated with thermally conductive adhesive for bonding the battery, the bottom of the battery is fixedly connected to the liquid cooling plate through the thermally conductive adhesive, and an aerogel insulation pad and a buffer pad are filled between two adjacent batteries.

[0014] In some embodiments: an insulating film is filled between the battery pack and the enclosure, the batteries of the battery pack are arranged in staggered or same positive and negative directions, and the battery pack on the upper layer is connected to the battery pack on the lower layer through a bus bar.

[0015] In some embodiments: the battery pack also includes a low-voltage wiring harness connected to the electrodes of each of the batteries through a bar, the low-voltage wiring harness is connected to a battery monitoring unit for monitoring the operating status of each of the batteries, and the battery monitoring unit is fixed on the side wall of the liquid cooling plate.

[0016] In some embodiments: an insulation layer is provided on the side wall of the periphery of the liquid cooling plate, a plurality of guide grooves are provided on the bottom surface of the liquid cooling plate to discharge condensed water to the periphery of the liquid cooling plate, and absorbent cotton is also provided at the bottom of the liquid cooling plate to absorb condensed water, and the absorbent cotton is located between two adjacent guide grooves.

[0017] In some embodiments: a dehumidifier and a desiccant are disposed in the box.

[0018] In some embodiments: a door panel that flips up is provided on one side of the box body, and the door panel is connected to the box body through an electric support rod.

[0019] The beneficial effects of the technical solution provided by this application include:

[0020] The embodiment of the present application provides an energy storage system. Since the energy storage system of the present application is provided with a battery rack, the battery rack includes a plurality of sequentially stacked liquid cooling components, the liquid cooling components include a liquid cooling plate arranged in a horizontal direction, the four corners of the bottom of the liquid cooling plate are respectively fixedly connected with support columns, and the top edge of the liquid cooling plate is connected with a fence; a battery pack, the battery pack includes a plurality of batteries sequentially arranged in an array in the liquid cooling component, the bottom of each battery is in heat exchange with the liquid cooling plate, and the battery pack is confined in the space formed by the fence. A box, a plurality of battery racks are fixedly arranged in the box, the plurality of battery racks are arranged in an array in the box, and are fixedly connected to the bottom of the box.

[0021] Therefore, the battery pack of the present application no longer needs to be made into a battery pack structure. When assembled for use, the above-mentioned battery frame, battery pack and box are transported to the site in a loose state and then installed on site, thereby reducing the design requirements for the product's strength during transportation, improving the energy density of the energy storage system, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the embodiment of the present application without a box.

[0024] Figure 2 This is a schematic diagram of the structure of an embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the structure of the liquid cooling assembly of an embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the structure of the liquid cooling assembly and battery pack according to an embodiment of the present application.

[0027] Reference numerals:

[0028] 10. Battery frame; 11. Liquid cooling plate; 12. Support column; 13. Crossbeam; 14. Longitudinal beam; 15. Positioning bump; 16. Coolant pipeline; 17. Battery monitoring unit; 20. Battery pack; 21. Battery; 30. Box; 31. Door panel; 32. Electric support rod. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The embodiment of the present application provides an energy storage system that can solve the problems of low integration, high component cost, and low energy density of energy storage containers in the related art.

[0031] See also Figures 1 to 4 , an embodiment of the present application provides an energy storage system, comprising:

[0032] The battery rack 10 includes a plurality of liquid cooling components stacked in sequence, each layer of the liquid cooling components includes a liquid cooling plate 11 arranged in a horizontal direction, and support columns 12 are fixedly connected to the four corners of the bottom of the liquid cooling plate 11, and a fence is connected to the top edge of the liquid cooling plate 11. The fence and the liquid cooling plate 11 together form a battery pack accommodating space that is open upward.

[0033] The battery pack 20 includes a plurality of batteries 21 arranged in an array in sequence in a liquid cooling assembly. The bottom of each battery 21 is in heat exchange with the liquid cooling plate 11. The battery pack 20 is confined in a battery pack accommodation space that is open upward and is formed between the enclosure and the liquid cooling plate 11. The liquid cooling plate 11 serves as both a liquid cooling device for cooling the battery 21 and a supporting device for the battery frame 10. In addition to being used to limit the battery pack 20, the enclosure also serves to constrain the battery pack 20 to solve the expansion problem of the battery pack 20 during the charging and discharging process.

[0034] The box 30 has a plurality of battery racks 10 fixed therein. The plurality of battery racks 10 are arranged in an array in the box 30 and are fixedly connected to the bottom of the box 30. The box 30 is used to protect the battery racks 10 and the battery pack 20 installed therein.

[0035] The energy storage system of the embodiment of the present application has a plurality of battery racks 10 fixedly disposed in a box 30, each battery rack 10 is provided with a plurality of liquid cooling components stacked in sequence, a battery pack 20 is placed in each layer of the liquid cooling components, and the battery pack 20 and the battery rack 10 together constitute a battery cluster.

[0036] The liquid cooling assembly is provided with a liquid cooling plate 11, and support columns 12 are fixedly connected to the four corners of the bottom of the liquid cooling plate 11, and a fence is connected to the top edge of the liquid cooling plate 11. In addition to being used to limit the battery pack 20, the fence also plays a role in constraining the battery pack 20 to solve the expansion problem of the battery pack 20 during the charging and discharging process. The liquid cooling plate 11, the support column 12 and the fence constitute a simple support structure for placing the battery pack 20, and the battery pack 20 does not need to be made into a battery pack structure.

[0037] When assembled for use, the battery frame 10, battery pack 20 and box 30 are transported to the site in a loose state and then installed on site, thereby reducing the design requirements for the strength of the product during transportation, improving the energy density of the energy storage system, and reducing production costs.

[0038] In some alternative embodiments: See Figure 1 As shown, an embodiment of the present application provides an energy storage system, in which the liquid cooling plate 11 of the energy storage system is a rectangular plate structure, a plurality of fluid channels are opened in the liquid cooling plate 11, a cooling liquid inlet connected to the fluid channel is provided at one end of the liquid cooling plate 11, and a cooling liquid outlet connected to the fluid channel is provided at the other end of the liquid cooling plate.

[0039] The two adjacent layers of liquid cooling plates 11 are connected via a cooling liquid pipeline 16, one end of the cooling liquid pipeline 16 is connected to the cooling liquid outlet of the lower layer of the liquid cooling plate 11, and the other end of the cooling liquid pipeline 16 is connected to the cooling liquid inlet of the upper layer of the liquid cooling plate 11. A pressurized circulation device is connected between the liquid cooling plates 11 at the uppermost layer or the lowermost layer in the battery rack 10, and the pressurized circulation device circulates the cooling liquid in each layer of the liquid cooling plates 11.

[0040] In some alternative embodiments: See Figure 1 and Figure 3 As shown, the embodiment of the present application provides an energy storage system, the bottom of the support column 12 of the energy storage system is a hollow structure with an opening at the bottom. Positioning protrusions 15 are vertically fixedly connected to the four corners of the top of the liquid cooling plate 11, and the projections of the positioning protrusions 15 and the support column 12 in the vertical direction overlap each other.

[0041] A guide piece 13 is provided on the top of the positioning protrusion 15 for facilitating positioning with the support column 12 of the upper liquid cooling plate 11. The guide piece 13 is a spherical structure or a conical structure, and a fastener (not shown in the figure) connected to the positioning protrusion 15 is connected to the support column 12. When the upper and lower layers of liquid cooling components are stacked and installed, the support column 12 of the liquid cooling component on the upper layer is sleeved on the positioning protrusion 15 of the liquid cooling component on the lower layer, so that the upper and lower layers of liquid cooling components are accurately aligned.

[0042] The enclosure includes two longitudinal beams 14 that are parallel to each other and spaced apart, and the ends of the longitudinal beams 14 are fixedly connected to the positioning protrusions 15. The two ends of the two longitudinal beams 14 are respectively connected to the four positioning protrusions 15 to form a rectangular accommodation space to limit the movement of the battery pack 20 on the top of the liquid cooling plate 11.

[0043] In some alternative embodiments: See Figure 1 As shown, an embodiment of the present application provides an energy storage system, in which the top of the liquid cooling plate 11 of the energy storage system is coated with a thermal conductive adhesive (not shown in the figure) for bonding the battery 21, the bottom of each battery 21 is fixedly connected to the liquid cooling plate 11 by the thermal conductive adhesive, and an aerogel insulation pad (not shown in the figure) and a buffer pad (not shown in the figure) are filled between two adjacent batteries 21.

[0044] An insulating film is filled between the battery pack 20 and the enclosure longitudinal beam 14, and the insulating film is used to insulate the electrical contact between the battery pack 20 and the enclosure. The batteries of the battery pack 20 are arranged in staggered or same positive and negative directions, and the battery pack 20 located in the upper layer is connected to the battery pack 20 located in the lower layer through a busbar, which can be copper or aluminum.

[0045] In some alternative embodiments: See Figure 1 and Figure 2 As shown, the embodiment of the present application provides an energy storage system, wherein the battery pack 20 of the energy storage system further includes a low-voltage harness (not shown) connected to the electrodes of each battery 21 through a bar sheet (not shown in the figure), and the low-voltage harness is connected to a battery monitoring unit 17 for monitoring the operating status of each battery 21, and the battery monitoring unit 17 is fixed on the side wall of the liquid cooling plate 11. The battery monitoring unit 17 is used to monitor the current, voltage, temperature and other information of the battery pack 20.

[0046] In order to prevent the liquid cooling plate 11 from exchanging heat to the surroundings, an insulation layer is provided on the side walls of the outer periphery of the liquid cooling plate 11, and a plurality of guide grooves (not shown in the figure) are opened on the bottom surface of the liquid cooling plate 11 to discharge condensed water to the outer periphery of the liquid cooling plate. The bottom of the liquid cooling plate 11 is also provided with absorbent cotton (not shown in the figure) for absorbing condensed water, and the absorbent cotton is located between two adjacent guide grooves.

[0047] The guide groove is used to guide the condensed water formed at the bottom of the liquid cooling plate 11 to the periphery of the liquid cooling plate 11. The absorbent cotton at the bottom of the liquid cooling plate 11 is used to absorb the condensed water to prevent the condensed water from dripping onto the lower battery pack 20 and causing short circuit or corrosion of the battery pack 20. In order to reduce the generation of condensed water, a dehumidifier (not shown in the figure) and a desiccant (not shown in the figure) are provided in the box 30.

[0048] In order to facilitate the installation of the battery frame 10 and the battery pack 20 into the box 30, a door panel 31 that flips upward is provided on one side of the box 30, and the door panel 31 is connected to the top of the box 30 by a hinge to maximize the opening of the box 30. The door panel 31 is connected to the box 30 by an electric support rod 32, and the electric support rod 32 automatically opens or closes the door panel 31.

[0049] How it works

[0050] The embodiment of the present application provides an energy storage system. Since the energy storage system of the present application is provided with a battery rack 10, the battery rack 10 includes a plurality of sequentially stacked liquid cooling components, the liquid cooling components include a liquid cooling plate 11 arranged in a horizontal direction, and support columns 12 are fixedly connected to the four corners of the bottom of the liquid cooling plate 11, and the top edge of the liquid cooling plate 11 is connected to a fence; a battery pack 20, the battery pack 20 includes a plurality of batteries 21 sequentially arranged in an array in the liquid cooling component, the bottom of each battery 21 is in heat exchange with the liquid cooling plate 11, and the battery pack 20 is confined in the space formed by the fence. A box 30, a plurality of battery racks 10 are fixedly arranged in the box 30, and the plurality of battery racks 10 are arranged in an array in the box 30 and are fixedly connected to the bottom of the box 30.

[0051] Therefore, the energy storage system of the present application is provided with a plurality of battery racks 10 fixedly disposed in a box 30, each battery rack 10 is provided with a plurality of liquid cooling components stacked in sequence, and battery packs 20 are placed in each layer of liquid cooling components, and the battery packs 20 and the battery racks 10 together constitute a battery cluster. The liquid cooling component is provided with a liquid cooling plate 11, and support columns 12 are fixedly connected to the four corners of the bottom of the liquid cooling plate 11, and a fence is connected to the top edge of the liquid cooling plate 11. The battery pack 20 does not need to be made into a battery pack structure. When assembled for use, the above-mentioned battery rack 10, battery pack 20 and box 30 are transported to the site in a scattered state and then installed on site, thereby reducing the design requirements for the strength of the product during transportation, improving the energy density of the energy storage system, and reducing production costs.

[0052] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0053] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0054] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An energy storage system, characterized in that: include: A battery frame (10), the battery frame (10) comprising a plurality of sequentially stacked liquid cooling components, the liquid cooling components comprising a liquid cooling plate (11) arranged in a horizontal direction, the four bottom corners of the liquid cooling plate (11) being respectively fixedly connected to support columns (12), and the top edge of the liquid cooling plate (11) being connected to a baffle; A battery pack (20), the battery pack (20) comprising a plurality of batteries (21) arranged in an array in sequence in a liquid cooling assembly, the bottom of each battery (21) exchanging heat with the liquid cooling plate (11), and the battery pack (20) being constrained in a space formed by the enclosure to limit expansion of the battery pack (20); A box (30) is provided with a plurality of battery racks (10) fixedly disposed in the box (30); the plurality of battery racks (10) are arranged in an array in the box (30) and are fixedly connected to the bottom of the box (30).

2. An energy storage system according to claim 1, characterized in that: The liquid cooling plate (11) is a rectangular plate structure, a plurality of fluid channels are provided in the liquid cooling plate (11), one end of the liquid cooling plate is provided with a cooling liquid inlet connected to the fluid channel, and the other end of the liquid cooling plate is provided with a cooling liquid outlet connected to the fluid channel; The two adjacent layers of liquid cooling plates (11) are connected via a cooling liquid pipeline (16), one end of the cooling liquid pipeline (16) is connected to the cooling liquid outlet of the lower layer of the liquid cooling plate (11), and the other end of the cooling liquid pipeline (16) is connected to the cooling liquid inlet of the upper layer of the liquid cooling plate (11).

3. An energy storage system according to claim 1 or 2, characterized in that: The bottom of the support column (12) is a hollow structure with an opening at the bottom, and the four corners of the top of the liquid cooling plate (11) are fixedly connected with positioning protrusions (15), and the projections of the positioning protrusions (15) and the support column (12) in the vertical direction overlap with each other.

4. An energy storage system according to claim 3, characterized in that: The positioning protrusion (15) is a spherical structure or a conical structure, and a fastener connected to the positioning protrusion (15) is connected to the support column (12). The enclosure includes two longitudinal beams (14) that are parallel to each other and spaced apart, and two cross beams (13) that are parallel to each other and spaced apart, and the ends of the longitudinal beams (14) and the cross beams (13) are fixedly connected to the positioning protrusion (15).

5. An energy storage system according to claim 1, characterized in that: The top of the liquid cooling plate (11) is coated with a heat-conducting adhesive for bonding the battery (21), the bottom of the battery (21) is fixedly connected to the liquid cooling plate (11) via the heat-conducting adhesive, and an aerogel insulation pad and a buffer pad are filled between two adjacent batteries (21).

6. An energy storage system according to claim 1, characterized in that: An insulating film is filled between the battery group (20) and the enclosure, the batteries (21) of the battery group (20) are arranged in staggered or identical positive and negative directions, and the battery group (20) located on the upper layer is connected to the battery group (20) located on the lower layer via a busbar.

7. An energy storage system according to claim 1, characterized in that: The battery pack (20) further comprises a low-voltage wiring harness connected to electrodes of each of the batteries (21) via a bar, the low-voltage wiring harness being connected to a battery monitoring unit (17) for monitoring the operating status of each of the batteries (21), the battery monitoring unit (17) being fixed on a side wall of the liquid cooling plate (11).

8. An energy storage system according to claim 1, characterized in that: An insulation layer is provided on the side wall of the outer periphery of the liquid cooling plate (11), a plurality of guide grooves for discharging condensed water to the outer periphery of the liquid cooling plate are provided on the bottom surface of the liquid cooling plate (11), and absorbent cotton for absorbing condensed water is also provided at the bottom of the liquid cooling plate, and the absorbent cotton is located between two adjacent guide grooves.

9. An energy storage system according to claim 1, characterized in that: A dehumidifier and a desiccant are arranged in the box (30).

10. An energy storage system according to claim 1, characterized in that: A door panel (31) that flips upward is provided on one side of the box body (30), and the door panel (31) is connected to the box body (30) via an electric support rod (32).

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