Energy storage battery cabinet and energy storage system having the same

Abstract

The present invention discloses an energy storage battery cabinet and an energy storage system having the same, wherein the energy storage battery cabinet comprises: a cabinet, wherein the width W1 of the cabinet, the depth D1 of the cabinet and the height H1 of the cabinet satisfy: 0.8≤W1 / D1≤1.2, 0.8≤(W1+D1) / H1≤1.2; a plurality of battery cells, wherein the plurality of battery cells are arranged in the cabinet, wherein the length L of the battery cell, the thickness D of the battery cell and the width H of the battery cell satisfy: (D+H) / L≤0.2; wherein the volume V1 of each battery cell and the volume V3 of the cabinet satisfy: 0.0004≤V1 / V3≤0.001. The energy storage battery cabinet according to an embodiment of the present invention controls the size parameters of the cabinet and the size parameters of the battery cell, thereby improving the volume utilization rate and capacity density of the battery cell while taking into account the output voltage of the energy storage battery cabinet.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to an energy storage battery cabinet and an energy storage system having the same. Background Art

[0002] In the related art, a plurality of battery packs are usually placed in the energy storage cabinet, and a plurality of battery cells are contained in the battery pack. The battery pack in the energy storage cabinet has a shell and other structures. The volumetric cell utilization rate (Volumetric Cell To System, VCTS) has been downgraded twice. The size and volume of the cabinet body of the energy storage battery cabinet and the size and volume of the battery cells are set unreasonably, resulting in a decrease in the volumetric cell utilization rate. Generally, the volumetric cell utilization rate is less than 28%, resulting in a low energy density. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an energy storage battery cabinet, which has the advantages of high cell volume utilization and high energy density by controlling the size parameters of the cabinet body and the size parameters of the battery cell, while taking into account the output voltage of the energy storage battery cabinet.

[0004] The present invention also provides an energy storage system having the above energy storage battery cabinet.

[0005] In order to achieve the above-mentioned purpose, according to a first aspect of the present invention, an energy storage battery cabinet is provided, comprising: a cabinet body, wherein the width W1 of the cabinet body, the depth D1 of the cabinet body and the height H1 of the cabinet body satisfy: 0.8≤W1 / D1≤1.2, 0.8≤(W1+D1) / H1≤1.2; a plurality of battery cells, wherein the plurality of battery cells are arranged in the cabinet body, and the length L of the battery cell, the thickness D of the battery cell and the width H of the battery cell satisfy: (D+H) / L≤0.2; wherein the volume V1 of each of the battery cells and the volume V3 of the cabinet body satisfy: 0.0004≤V1 / V3≤0.001.

[0006] The energy storage battery cabinet according to the embodiment of the present invention has the advantages of high cell volume utilization and high energy density by controlling the size parameters of the cabinet body and the size parameters of the battery cells, while taking into account the output voltage of the energy storage battery cabinet.

[0007] According to some embodiments of the present invention, the battery cell is configured in a rectangular parallelepiped shape.

[0008] According to some embodiments of the present invention, the sum V2 of the volumes of the plurality of battery cells and the volume V3 of the cabinet satisfy: 0.35≤V2 / V3≤0.5.

[0009] According to some embodiments of the present invention, the length L of the battery cell, the thickness D of the battery cell and the width H of the battery cell satisfy: 400mm≤L≤1200mm, 10mm≤D≤40mm, 60mm≤H≤150mm.

[0010] According to some embodiments of the present invention, the length L of the battery cell, the thickness D of the battery cell and the width H of the battery cell satisfy: 800mm≤L≤970mm, 10mm≤D≤30mm, 80mm≤H≤130mm.

[0011] According to some embodiments of the present invention, the width W1 of the cabinet, the depth D1 of the cabinet, and the height H1 of the cabinet satisfy: 600mm≤W1≤1200mm, 700mm≤D1≤1250mm, 1300≤H1≤2600mm.

[0012] According to some embodiments of the present invention, the length L of the battery cell and the width W1 of the cabinet satisfy: 0.35≤L / W1<1.

[0013] According to some embodiments of the present invention, the energy storage battery cabinet further includes: a plurality of battery cell layer groups, wherein the plurality of battery cell layer groups are stacked along the height direction of the cabinet, and each of the battery cell layer groups includes at least one battery cell in one of the width direction and the depth direction of the cabinet and includes a plurality of battery cells in the other direction.

[0014] According to some embodiments of the present invention, the length direction of the battery cells is arranged along the width direction of the cabinet, the thickness direction of the battery cells is arranged along the depth direction of the cabinet, and the width direction of the battery cells is arranged along the height direction of the cabinet.

[0015] According to some embodiments of the present invention, the number of the battery core layer groups is 8 to 18.

[0016] According to some embodiments of the present invention, after the multiple battery cell layer groups are arranged in the height direction of the cabinet, the overall width is W2, the depth is D2, and the height is H2, wherein 500mm≤W2≤1100mm; 450mm≤D2≤1000mm; 1150mm≤H2≤2450mm.

[0017] According to some embodiments of the present invention, a plurality of the battery cell layer groups constitute a battery cell unit; or a plurality of the battery cell layer groups constitute a plurality of battery cell units, and the plurality of the battery cell units are arranged in the height direction of the cabinet; wherein each of the battery cell units includes a plurality of the battery cell layer groups, and two adjacent battery cell layer groups of each of the battery cell units abut against each other.

[0018] According to some embodiments of the present invention, there is an air duct gap between the battery cells of two adjacent battery cell layer groups of each of the battery cell units.

[0019] According to some embodiments of the present invention, a dimension of the air duct gap in a height direction of the cabinet is 5 mm to 20 mm.

[0020] According to some embodiments of the present invention, each of the battery layer groups further includes: a first bottom plate and a second bottom plate, the first bottom plate and the second bottom plate are spaced apart along one of the width direction of the cabinet and the depth direction of the cabinet, and for two adjacent battery layer groups of each battery cell unit, the first bottom plate and the second bottom plate of one battery layer group abut against the battery cells of the other battery layer group, and a duct gap is formed between the first bottom plate and the second bottom plate.

[0021] According to some embodiments of the present invention, each of the battery layer groups further includes: a first side panel and a second side panel, the first side panel and the second side panel are spaced apart along the width direction of the cabinet and the other direction of the depth direction of the cabinet, the two ends of the first bottom panel are respectively connected to one end of the first side panel and one end of the second side panel, and the two ends of the second bottom panel are respectively connected to the other end of the first side panel and the other end of the second side panel; wherein, for two battery layer groups adjacent to each other in the height direction of the cabinet, the first bottom panel of one battery layer group is respectively stopped against the first side panel and the second side panel of the other battery layer group, and the second bottom panel of one battery layer group is respectively stopped against the first side panel and the second side panel of the other battery layer group.

[0022] According to some embodiments of the present invention, the first bottom plate and the second bottom plate are both provided with one of the limiting columns and the limiting holes, and the first side plate and the second side plate are both provided with the other of the limiting columns and the limiting holes; wherein, for two battery cell layer groups adjacent in the height direction of the cabinet, the limiting columns of one battery cell layer group cooperate with the limiting holes of the other battery cell layer group.

[0023] According to some embodiments of the present invention, one of the limiting columns and the limiting holes is distributed at both ends of the first bottom plate and at both ends of the second bottom plate; the other of the limiting columns and the limiting holes is distributed at both ends of the first side plate and at both ends of the second side plate.

[0024] According to some embodiments of the present invention, for two battery cell layer groups adjacent to each other in the height direction of the cabinet, the first side plate of the other battery cell layer group is fastened to the first bottom plate and the second bottom plate of the one battery cell layer group by a first fastener, and the second side plate of the other battery cell layer group is fastened to the first bottom plate and the second bottom plate of the one battery cell layer group by a second fastener.

[0025] According to some embodiments of the present invention, the first fasteners are distributed at two ends of the first side plate; and the second fasteners are distributed at two ends of the second side plate.

[0026] According to some embodiments of the present invention, each of the battery cell units includes a base and a plurality of battery cells of the battery cell unit are supported on the base.

[0027] According to some embodiments of the present invention, at least one restraint belt is provided above each battery cell unit, both ends of each restraint belt are respectively connected to pull rods, and the lower end of each pull rod is connected to the base of the battery cell unit.

[0028] According to some embodiments of the present invention, the energy storage battery cabinet further includes: a refrigeration unit, which is installed in the cabinet and located on one side of the cabinet in the depth direction of the cabinet, the refrigeration unit having an air outlet and a return air outlet, and the cabinet is constructed with a heat dissipation duct connected to the air outlet on one side in the height direction of the cabinet, and there is an air duct gap between the battery cells of two adjacent battery cell layer groups in the height direction of the cabinet; wherein, after the air flow flows into the heat dissipation duct from the air outlet, it flows through the multiple battery cell layer groups from the other side in the depth direction of the cabinet and from both sides in the width direction of the cabinet, and flows into the return air outlet through the air duct gap.

[0029] According to some embodiments of the present invention, the cabinet has a cabinet door on one side in the depth direction thereof; the energy storage battery cabinet also includes a refrigeration unit, which is installed in the cabinet; wherein the refrigeration unit is installed on the cabinet door, and the multiple battery cell layer groups enter and exit the cabinet by opening the cabinet door.

[0030] According to some embodiments of the present invention, the cabinet door is provided with an external circulation air inlet, an external circulation air outlet and an exhaust device, and the external circulation air inlet, the external circulation air outlet and the exhaust device are arranged along the height direction of the cabinet body.

[0031] According to some embodiments of the present invention, the cabinet door is provided with a maintenance door which can be opened and closed relative to the cabinet door, and the maintenance door is located at a lower part of the cabinet door in the height direction of the cabinet body.

[0032] According to an embodiment of the second aspect of the present invention, an energy storage system is provided, comprising at least one energy storage battery cabinet according to the embodiment of the first aspect of the present invention.

[0033] The energy storage system according to the embodiment of the second aspect of the present invention controls the size parameters of the cabinet and the size parameters of the battery cells by utilizing the energy storage battery cabinet according to the embodiment of the first aspect of the present invention, and has the advantages of high battery cell volume utilization and high energy density, while taking into account the output voltage of the energy storage system.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 It is a schematic structural diagram of a closed cabinet door of an energy storage battery cabinet according to an embodiment of the present invention.

[0037] Figure 2 2 is a schematic structural diagram of an energy storage battery cabinet with its door opened according to an embodiment of the present invention.

[0038] Figure 3 It is a schematic structural diagram of a battery cell unit of an energy storage battery cabinet according to an embodiment of the present invention.

[0039] Figure 4 2 is a schematic structural diagram of a battery cell unit of an energy storage battery cabinet from another perspective according to an embodiment of the present invention.

[0040] Figure 5 It is a schematic structural diagram of an energy storage battery cabinet with its door opened according to another embodiment of the present invention.

[0041] Figure 6 is an exploded view of an energy storage battery cabinet according to another embodiment of the present invention.

[0042] Figure 7 is a schematic structural diagram of an energy storage system according to an embodiment of the present invention.

[0043] Figure 8 yes Figure 3 A partial enlarged view of the D area in the middle.

[0044] Fig. 9 is an exploded view of a battery cell layer group of an energy storage battery cabinet according to an embodiment of the present invention.

[0045] Reference numerals:

[0046] Energy storage battery cabinet 1, energy storage system 2,

[0047] Cabinet 100, cabinet door 110, heat dissipation duct 120, external circulation air inlet 130, external circulation air outlet 140, exhaust device 150, maintenance door 160,

[0048] The battery cell 200, the battery cell layer group 210, the battery cell unit 220, the air duct gap 230, the first bottom plate 240, the second bottom plate 250, the base 260, the restraint belt 270, the pull rod 280,

[0049] Refrigeration unit 300 , first side plate 400 , second side plate 500 , limiting pillar 600 , limiting hole 700 . DETAILED DESCRIPTION

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like 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 invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In the description of the present invention, "plurality" means two or more than two, and "several" means one or more.

[0053] The energy storage battery cabinet 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0054] like Figure 1-Figure 7 As shown, the energy storage battery cabinet 1 according to an embodiment of the present invention includes a cabinet body 100 and a plurality of battery cells 200 .

[0055] The width W1 of the cabinet 100, the depth D1 of the cabinet 100, and the height H1 of the cabinet 100 satisfy: 0.8≤W1 / D1≤1.2, 0.8≤(W1+D1) / H1≤1.2. A plurality of battery cells 200 are arranged in the cabinet 100, and the length L of the battery cell 200, the thickness D of the battery cell 200, and the width H of the battery cell 200 satisfy: (D+H) / L≤0.2. Among them, the volume V1 of each battery cell 200 and the volume V3 of the cabinet 100 satisfy: 0.0004≤V1 / V3≤0.001.

[0056] The energy storage battery cabinet 1 can meet the needs of industrial and commercial energy storage and household energy storage. In addition, the volume of each battery cell 200 can be 1.20×10 -3 m 3 ~1.24×10 -3 m 3For example, the volume of cell 200 is 1.22×10 -3 m 3 The width, depth and height of the cabinet 100 are calculated by the distance between its outer sides. In addition, the volume of the battery cell 200 is the product of its length L, thickness D and width H, wherein the length L of the battery cell 200 includes the poles at both ends of the battery cell 200.

[0057] According to the energy storage battery cabinet 1 of the embodiment of the present invention, the ratio of the width W1 and the depth D1 of the cabinet 100 is set to 0.8-1.2, for example, the ratio of the width W1 and the depth D1 of the cabinet 100 can be 0.8, 0.85, 0.9, 0.95, 1, 1.05, 1.1, 1.15 or 1.2. The ratio of the sum of the width W1 and the depth D1 of the cabinet 100 to the height H1 of the cabinet 100 is 0.8-1.2, for example, the ratio of the sum of the width W1 and the depth D1 of the cabinet 100 to the height H1 of the cabinet 100 can be 0.8, 0.85, 0.9, 0.95, 1, 1.05, 1.1, 1.15 and 1.2. In this way, the width and depth of the energy storage battery cabinet 1 are close to the same, and the height of the energy storage battery cabinet 1 is close to twice its width or depth.

[0058] In addition, the length L of the battery cell 200, the thickness D of the battery cell 200 and the width H of the battery cell 200 satisfy: (D+H) / L≤0.2, which can ensure that the thickness and width of the battery cell 200 are much smaller than the length of the battery cell 200, so that the battery cell 200 is constructed as a long strip structure.

[0059] Among them, the volume V1 of each battery cell 200 and the volume V3 of the cabinet 100 satisfy: 0.0004≤V1 / V3≤0.001. By setting V1 / V3 to be not less than 0.0004 and not more than 0.001, the number of battery cells 200 accommodated in a unit volume of the energy storage battery cabinet 1 of the present invention is appropriate, and the output voltage of the energy storage battery cabinet 1 can be guaranteed while improving the volume utilization rate of the energy storage battery cabinet 1.

[0060] For example, if V1 / V3≤0.0004, the volume of a single battery cell 200 accounts for a small proportion. To ensure the output voltage of the energy storage system 2, the number of battery cells 200 is within a certain range. Therefore, there will be more space in the energy storage battery cabinet 1 where battery cells 200 are not arranged, and the volume utilization rate of the energy storage battery cabinet 1 will be low; if V1 / V3>0.001, the volume of a single battery cell 200 accounts for too large a proportion. Even if as many battery cells 200 as possible are arranged in the energy storage battery cabinet 1 to improve the volume utilization rate, the number of battery cells 200 will not be too large. Therefore, the overall output voltage of the battery cells 200 cannot reach the output voltage required by the energy storage battery cabinet 1, that is, the output voltage of the energy storage battery cabinet 1 cannot be taken into account.

[0061] In this way, on the one hand, it can be avoided that the volume of the cabinet 100 is much larger than the volume of the battery cells 200, and the cabinet 100 can be filled with no excessive battery cells 200, which is convenient for assembly, and multiple battery cells 200 can fill the cabinet 100 as much as possible, avoiding a low number of battery cells 200 in the cabinet 100 per unit volume, thereby improving the volume utilization rate of the battery cells 200.

[0062] On the other hand, the volume difference between the cabinet 100 and the battery cells 200 can be avoided to be too small, and the number of battery cells 200 in the cabinet 100 can reach a certain value, thereby ensuring that the overall output voltage of the battery cells 200 is within a certain range, so that the output voltage of the energy storage battery cabinet 1 meets the use requirements.

[0063] In summary, 0.8≤W1 / D1≤1.2, 0.8≤(W1+D1) / H1≤1.2, (D+H) / L≤0.2, and 0.0004≤V1 / V3≤0.001. The energy storage battery cabinet 1 that meets the above four conditions has a high cell volume utilization rate, a high energy density, and a moderate volume, while taking into account the output voltage of the energy storage battery cabinet 1.

[0064] Thus, the energy storage battery cabinet 1 according to the embodiment of the present invention has the advantages of high cell volume utilization and high energy density by controlling the size parameters of the cabinet body 100 and the size parameters of the battery cell 200 , while taking into account the output voltage of the energy storage battery cabinet 1 .

[0065] According to some specific embodiments of the present invention, Figure 2-Figure 4 As shown, the battery cell 200 is configured in a rectangular parallelepiped shape. It should be noted that the battery cell 200 may be substantially in a rectangular parallelepiped shape, but not necessarily in a strict rectangular parallelepiped shape.

[0066] Compared with cylindrical cells or special-shaped cells with more curved surfaces, except for necessary structures (such as heat insulation treatment) in the energy storage battery cabinet 1, when the rectangular cells 200 are stacked, the space volume in the energy storage battery cabinet 1 can be utilized to the maximum extent, thereby improving the space utilization rate. For example, the rectangular cells 200 can utilize the space in the width direction of the energy storage battery cabinet 1 to the maximum extent in the length direction, and when the rectangular cells 200 are placed side by side along the thickness direction and the height direction, the space in the depth direction of the energy storage battery cabinet 1 can be utilized to the maximum extent.

[0067] According to some specific embodiments of the present invention, Figure 2 and Figure 5As shown, the sum of the volumes V2 of the multiple battery cells 200 and the volume V3 of the cabinet 100 satisfy: 0.35≤V2 / V3≤0.5. For example, when the voltage of each battery cell 200 is about 3.2V, each battery cell 200 is in the optimal working state, the voltage range of the energy storage battery cabinet 1 is within 998.4VDC~1497.6VDC, and the energy storage battery cabinet 1 achieves the optimal efficiency.

[0068] Based on the limitations of V2 / V3 and V1 / V3, the number of battery cells 200 can be determined, thereby determining the output voltage of the energy storage battery cabinet 1 and ensuring the efficiency of the energy storage battery cabinet 1. This solution can take into account both the volume utilization rate of the energy storage battery cabinet 1 and the output voltage of the energy storage battery cabinet 1, that is, it can take into account both the volume utilization rate of the energy storage battery cabinet 1 and the efficiency of the energy storage battery cabinet 1.

[0069] For example, the space in the cabinet 100 other than the space occupied by the battery cell 200 can be used to arrange the control unit, the refrigeration unit 300, the fire fighting unit and other units. In this way, while improving the battery cell volume utilization rate of the energy storage battery cabinet 1, there can also be sufficient space to arrange other units, the space utilization of the energy storage battery cabinet 1 is more sufficient, and the volume of the energy storage battery cabinet 1 does not need to be set too large, which is convenient for the energy storage battery cabinet 1 to be applied to different scenarios, and the battery cell volume utilization rate of the energy storage battery cabinet 1 can be as low as 35% and as high as 50%. The battery cell volume utilization rate of the energy storage battery cabinet 1 of the present invention far exceeds the battery cell volume utilization rate of the energy storage battery cabinet in the related art, and the energy storage battery cabinet 1 of the present invention has a higher energy density.

[0070] According to some specific embodiments of the present invention, Figure 3 and Figure 4 As shown, the length L of the battery cell 200 and the width W1 of the cabinet 100 satisfy: 0.35≤L / W1<1. Further, the length L of the battery cell 210 and the width W1 of the cabinet 100 satisfy: 0.8≤L / W1<1.

[0071] The ratio of the length L of the battery cell 200 to the width of the cabinet 100 is not less than 0.8, the gap between the battery cell 200 in the length direction and the inner wall of the cabinet 100 within the unit volume is smaller, and the battery cell volume utilization rate is higher. For example, the battery cell volume utilization rate can reach 42.7%, and the ratio of the length L of the battery cell 200 to the width of the cabinet 100 is less than 1. Therefore, the length direction of the battery cell 200 and the width direction of the cabinet 100 can be arranged in the same way, and the arrangement of the battery cell 200 in the cabinet 100 is more diverse.

[0072] According to some specific embodiments of the present invention, Figure 3 and Figure 4As shown, the length L of the battery cell 200, the thickness D of the battery cell 200 and the width H of the battery cell 200 satisfy: 400mm≤L≤1200mm, 10mm≤D≤40mm, 60mm≤H≤150mm. For example, L can be 500mm, 550mm, 600mm, 650mm, 700mm, 750mm, 800mm, 850mm, 900mm, 950mm, 1000mm, 1050mm, 1100mm, 1150mm or 1200mm.

[0073] The energy storage battery cabinet 1 used in the home generally adopts a wall-mounted structure, and the battery cells 200 need to be as flat as possible, and the battery cells 200 on each battery cell layer group 210 also need to be as flat as possible after being arranged. In this way, after the energy storage battery cabinet 1 using the above battery cells 200 is hung on the wall, the size of the protrusion from the wall is less likely to exceed 500mm, so that it hardly interferes with the normal activities of users at home, and better meets the use needs of home users.

[0074] According to some specific embodiments of the present invention, Figure 3 and Figure 4 As shown, the length L of the battery cell 200, the thickness D of the battery cell 200 and the width H of the battery cell 200 satisfy: 800mm≤L≤970mm, 10mm≤D≤30mm, 80mm≤H≤130mm. For example, L can be 800mm, 820mm, 840mm, 860mm, 880mm, 900mm, 920mm, 940mm, 960mm or 970mm.

[0075] The energy storage battery cabinet 1 used in industry and commerce generally requires one battery cell 200 to be arranged in the first direction, and multiple battery cells 200 can be stacked in the second direction and the third direction. In this way, the energy storage battery cabinet 1 using the above battery cells 200 can store more electricity and has a stronger power supply capacity, meeting the use needs of industry and commerce.

[0076] According to some specific embodiments of the present invention, Figure 3 and Figure 4 As shown, the width W1 of the cabinet 100 , the depth D1 of the cabinet 100 , and the height H1 of the cabinet 100 satisfy: 600 mm≤W1≤1200 mm, 700 mm≤D1≤1250 mm, 1300≤H1≤2600 mm.

[0077] In this way, the size of the energy storage battery cabinet 1 will not be too large, the structural strength of the energy storage battery cabinet 1 can be ensured, and it is easy to hoist, and the size of the energy storage battery cabinet 1 will not be too small, and the energy storage battery cabinet 1 has sufficient space for arranging the battery cells 200, thereby increasing the power supply time of the energy storage battery cabinet 1. For example, the energy storage battery cabinet 1 can be stacked, combined, transported, and used in a 20GP container or a 40GP container. Ten energy storage battery cabinets 1 can be transported in a 20GP container, and 20 energy storage battery cabinets 1 can be transported in a 40GP container, and the transportation cost is significantly reduced.

[0078] According to some specific embodiments of the present invention, Figure 3 As shown, multiple battery cells 200 form multiple battery cell layer groups 210, and multiple battery cell layer groups 210 are stacked along the height direction of the cabinet 100. Each battery cell layer group 210 includes at least one battery cell 200 in one direction of the width direction and the depth direction of the cabinet 100 and includes multiple battery cells 200 in the other direction.

[0079] In actual application of the energy storage battery cabinet 1, the height direction of the cabinet 100 is generally vertical, the bottom surface of each battery cell layer group 210 is stopped against the top surface of the battery cell layer group 210 below it, and under the action of gravity, except for the bottom battery cell layer group 210, each of the other battery cell layer groups 210 will be pressed to the battery cell layer group 210 adjacent to it below, so that the abutment between the multiple battery cell layer groups 210 is reliable, so that the multiple battery cell layer groups 210 are limited to each other, so as to achieve stable positioning of the multiple battery cell layer groups 210 in the cabinet 100 and ensure the safety of electrical connection.

[0080] Compared with the energy storage battery cabinet in the related art that fixes the position of the battery cell layer group by setting a structure such as a bracket or a shell, the energy storage battery cabinet 1 of the present invention is limited by multiple battery cell layer groups 210 themselves, and there is no need to set an additional limiting and fixing structure, thereby reducing the number of parts. Therefore, more space in the energy storage battery cabinet 1 can be used to arrange the battery cells 200, thereby improving the energy density of the energy storage battery cabinet 1 and the volume utilization of the battery cells 200.

[0081] According to some specific embodiments of the present invention, Figure 2-Figure 5 As shown, the length direction of the battery cell 200 is arranged along the width direction of the cabinet 100 , the thickness direction of the battery cell 200 is arranged along the depth direction of the cabinet 100 , and the width direction of the battery cell 200 is arranged along the height direction of the cabinet 100 .

[0082] The length of the battery cell 200 is generally greater than the thickness of the battery cell 200 and the width of the battery cell 200. By arranging the length of the battery cell 200 along the width direction of the cabinet 100, on the premise of meeting the electrical safety requirements, the length of the battery cell 200 can be roughly the same as the width of the cabinet 100, so that the battery cell 200 can fill the cabinet 100 as much as possible in the width direction of the cabinet 100, and the number of battery cells 200 arranged in each battery layer group 210 along the depth direction of the cabinet 100 can be determined according to the relationship between the thickness of the battery and the depth of the cabinet 100, so that the battery cell 200 can fill the cabinet 100 as much as possible in the depth direction of the cabinet 100. In this way, the battery cell volume utilization and energy density of the energy storage battery cabinet 1 can be improved.

[0083] According to some specific embodiments of the present invention, Figure 2-Figure 5 As shown, the number of the battery cell layer groups 210 is 8 to 18.

[0084] Since the battery cell layer groups 210 need to support each other, when the energy storage battery cabinet 1 is used, one of the two outermost battery cell layer groups 210 will inevitably bear the pressure of the remaining battery cell layer groups 210. Therefore, by setting the number of battery cell layer groups 210 to be no more than 18, it is possible to avoid the outermost battery cell layer groups 210 being broken due to pressure, thereby ensuring the service life of each battery cell layer group 210. In addition, the number of battery cell layer groups 210 is no less than 8, which can increase the volume utilization rate of the battery cells 200 of the energy storage battery cabinet 1 and extend the power supply time of the energy storage battery cabinet 1.

[0085] According to some specific embodiments of the present invention, Figure 2-Figure 5 As shown, after the multiple battery cell layer groups 210 are arranged in the height direction of the cabinet 100, the overall width is W2, the depth is D2, and the height is H2, wherein 500mm≤W2≤1100mm; 450mm≤D2≤1000mm; 1150mm≤H2≤2450mm.

[0086] In this way, on the one hand, the overall size of the multiple battery layer groups 210 will not be too large, suitable for different usage scenarios, and the energy storage battery cabinet 1 using the multiple battery layer groups 210 of the present invention is also easy to move and disassemble, and on the other hand, the overall size of the multiple battery layer groups 210 will not be too small, so the power stored in the multiple battery layer groups 210 can meet the use of most situations, and the endurance is strong. In addition, the overall size of the battery layer group 210 is more compatible with the cabinet 100, and the volume utilization rate is also higher.

[0087] According to some specific embodiments of the present invention, Figure 3-Figure 6As shown, a plurality of cell layer groups 210 constitute a cell unit 220, or a plurality of cell layer groups 210 constitute a plurality of cell units 220, and the plurality of cell units 220 are arranged in the height direction of the cabinet 100. Each cell unit 220 includes a plurality of cell layer groups 210, and two adjacent cell layer groups 210 of each cell unit 220 abut against each other.

[0088] In this way, there is no need to set up additional protective structures between the battery cells 200 of each battery cell layer group 210, thereby reducing the number of parts in the energy storage battery cabinet 1. More space in the energy storage battery cabinet 1 can be used to arrange the battery cells 200, thereby achieving the purpose of improving the battery cell volume utilization and energy density of the energy storage battery cabinet 1.

[0089] According to some specific embodiments of the present invention, Figure 3-Figure 6 As shown, there is an air duct gap 230 between the battery cells 200 of two adjacent battery cell layer groups 210 of each battery cell unit 220 .

[0090] In this way, the battery cells 200 of two adjacent battery cell layer groups 210 will not directly transfer heat to each other, which can avoid heat accumulation between the battery cells 200, and the heat exchange area between the battery cells 200 of each battery cell layer group 210 and the air in the energy storage battery cabinet 1 is larger, thereby improving the heat dissipation capacity of the battery cells 200.

[0091] According to some specific embodiments of the present invention, Figure 3-Figure 6 As shown, the dimension of the air duct gap 230 in the height direction of the cabinet 100 is 5 mm to 20 mm.

[0092] In this way, the distance between the battery cells 200 of the two battery cell layer groups 210 is not less than 5 mm, which can facilitate sufficient heat dissipation of the battery cells 200 of each battery cell layer group 210 and avoid thermal runaway caused by heat accumulation. In addition, the distance between the battery cells 200 of the two battery cell layer groups 210 is not greater than 20 mm, which can ensure the battery cell volume utilization and energy density of the energy storage battery cabinet 11.

[0093] According to some specific embodiments of the present invention, Figure 3-Figure 6 , Figure 8 As shown, each battery layer group 210 also includes a first bottom plate 240 and a second bottom plate 250, and the first bottom plate 240 and the second bottom plate 250 are spaced apart along one of the width direction of the cabinet 100 and the depth direction of the cabinet 100. For two adjacent battery layer groups 210 of each battery cell unit 220, the first bottom plate 240 and the second bottom plate 250 of one battery layer group 210 stop against the battery cell 200 of the other battery layer group 210, and a duct gap 230 is formed between the first bottom plate 240 and the second bottom plate 250.

[0094] The arrangement of the first bottom plate 240 and the second bottom plate 250, on the one hand, can support adjacent battery cell layer groups 210, so that the plurality of battery cell layer groups 210 can rely on the first bottom plate 240 and the second bottom plate 250 to limit and support each other, and fix the relative positions between the plurality of battery cell layer groups 210; on the other hand, the first bottom plate 240 and the second bottom plate 250 can guide the gas entering into the air duct gap 230, thereby improving the heat dissipation efficiency of the gas to the battery cell 200, making the battery cell 200 less susceptible to heat damage, and extending the service life of the energy storage battery cabinet 1.

[0095] According to some specific embodiments of the present invention, Figure 3-Figure 6 As shown, each battery cell unit 220 includes a base 260 and a plurality of battery cells 200 of the battery cell unit 220 are supported on the base 260. Each base 260 may be directly connected to the cabinet 100.

[0096] In this way, when there are multiple battery cell units 220, the number of bases 260 corresponds one-to-one to the number of battery cell units 220, so that the maximum pressure on the battery cell layer group 210 in each battery cell unit 220 can be reduced, which can increase the number of battery cell units 220 in the energy storage battery cabinet 1 and reduce the probability of damage to the battery cell layer group 210 in each battery cell unit 220.

[0097] According to some specific embodiments of the present invention, Figure 3-Figure 6 As shown, at least one restraint belt 270 is disposed above each battery cell unit 220 , and both ends of each restraint belt 270 are respectively connected to a pull rod 280 , and the lower end of each pull rod 280 is connected to the base 260 of the battery cell unit 220 .

[0098] Among them, the pull rod 280 can extend along the height direction of the cabinet 100, and the pull rod 280 is located on the opposite sides of the battery cell layer group 210 in the width direction or depth direction of the cabinet 100. That is to say, if the pull rod 280 is located on both sides of the battery cell layer group 210 in the width direction of the cabinet 100, the restraint belt 270 can extend along the width direction of the cabinet 100, and the pull rod 280 can fix and limit the battery cell layer group 210 in the width direction of the cabinet 100; if the pull rod 280 is located on both sides of the battery cell layer group 210 in the depth direction of the cabinet 100, the restraint belt 270 can extend along the depth direction of the cabinet 100, and the pull rod 280 can fix and limit the battery cell layer group 210 in the depth direction of the cabinet 100.

[0099] In addition, through the cooperation of the restraint belt 270 and the pull rod 280, the battery cell layer group 210 can be fixed and limited in the height direction of the cabinet 100, and the position of the battery cell layer group 210 is not easy to change, which ensures the reliability of the electrical connection of the battery cell 200, and is conducive to improving the safety and structural stability of the energy storage battery cabinet 1. In addition, there is no need to set up an additional fixing structure between at least two battery cell layer groups 210, so there is more space in the energy storage battery cabinet 1 for arranging the battery cell layer group 210, and the volume utilization rate of the battery cell 200 will be greatly improved.

[0100] According to some specific embodiments of the present invention, Fig. 9 As shown, each battery cell layer group 210 also includes a first side panel 400 and a second side panel 500, which are respectively located on both sides of the battery cell layer group 210, and the first side panel 400 and the second side panel 500 are relatively arranged along the width direction and the other direction of the depth direction of the cabinet 100, and the two ends of the first bottom plate 240 are respectively connected to one end of the first side panel 400 and one end of the second side panel 500, and the two ends of the second bottom plate 250 are respectively connected to the other end of the first side panel 400 and the other end of the second side panel 500.

[0101] Among them, for two battery cell layer groups 210 adjacent in the height direction of the cabinet 100, the first bottom plate 240 of one battery cell layer group 210 respectively stops against the first side plate 400 and the second side plate 500 of the other battery cell layer group 210, and the second bottom plate 250 of one battery cell layer group 210 respectively stops against the first side plate 400 and the second side plate 500 of the other battery cell layer group 210.

[0102] In this way, the two adjacent battery cell layer groups 210 do not need to be directly stopped by the battery cell 200, thereby reducing the probability of the battery cell 200 being broken by force, and the first side plate 400 and the second side plate 500 are located on opposite sides of the battery cell layer group 210, which can prevent the two adjacent battery cell layer groups 210 from being deflected by force, and the arrangement of the battery cell layer group 210 is more stable.

[0103] In some specific embodiments of the present invention, Fig. 9 As shown, the first bottom plate 240 and the second bottom plate 250 are both provided with one of the limiting columns 600 and the limiting holes 700 , and the first side plate 400 and the second side plate 500 are both provided with the other of the limiting columns 600 and the limiting holes 700 .

[0104] Among them, for two battery cell layer groups 210 adjacent to each other in the height direction of the cabinet 100 , the limiting pillars 600 of one battery cell layer group 210 are matched with the limiting holes 700 of the other battery cell layer group 210 .

[0105] The cooperation between the limiting holes 700 and the limiting posts 600 can fix the positions of adjacent battery cell layer groups 210 to prevent the adjacent battery cell layer groups 210 from rotating relative to each other, thereby achieving higher positioning accuracy, more reliable assembly and electrical connection, and higher safety.

[0106] In some specific embodiments of the present invention, Fig. 9 As shown, one of the limiting columns 600 and limiting holes 700 is distributed at both ends of the first bottom plate 240 and both ends of the second bottom plate 250, and the other of the limiting columns 600 and limiting holes 700 is distributed at both ends of the first side plate 400 and both ends of the second side plate 500.

[0107] In this way, there are more fixing points between adjacent battery cell layer groups 210, which further improves the positioning accuracy between adjacent battery cell layer groups 210, makes the assembly and electrical connection more reliable, and improves safety.

[0108] In some specific embodiments of the present invention, Fig. 9 As shown, for two battery layer groups 210 adjacent in the height direction of the cabinet 100, the first side plate 400 of the other battery layer group 210 is fastened with the first bottom plate 240 and the second bottom plate 250 of one battery layer group 210 by a first fastener, and the second side plate 500 of the other battery layer group 210 is fastened with the first bottom plate 240 and the second bottom plate 250 of one battery layer group 210 by a second fastener. The first fastener and the second fastener may be threaded fasteners.

[0109] In this way, the relative positions of adjacent battery cell layer groups 210 can be fixed to prevent the adjacent battery cell layer groups 210 from being separated during transportation or assembly, so that the adjacent battery cell layer groups 210 can be disassembled and assembled as a whole, which not only has high assembly efficiency, but also can ensure the positioning accuracy between adjacent battery cell layer groups 210 during the entire transportation and assembly process, so that the overall assembly accuracy of the energy storage battery cabinet 1 is higher, and the assembly and electrical connection are more reliable and safer.

[0110] In some specific embodiments of the present invention, Fig. 9 As shown, the first fasteners are distributed at both ends of the first side plate 400 , and the second fasteners are distributed at both ends of the second side plate 500 .

[0111] In this way, there are multiple fixed points between the relative positions of adjacent battery cell layer groups 210, and adjacent battery cell layer groups 210 are less likely to separate, which can more reliably ensure the positioning accuracy between adjacent battery cell layer groups 210, so that the overall assembly accuracy of the energy storage battery cabinet 1 is higher, and the assembly and electrical connection are more reliable and safer.

[0112] According to some specific embodiments of the present invention, Figure 2and Figure 5 As shown, the energy storage battery cabinet 1 also includes a refrigeration unit 300, which is installed in the cabinet 100 and is located on one side of the cabinet 100 in the depth direction of the cabinet 100. The refrigeration unit 300 has an air outlet and a return air outlet. The cabinet 100 is configured with a heat dissipation duct 120 connected to the air outlet on one side in the height direction of the cabinet 100, and there is an air duct gap 230 between the cells 200 of two adjacent cell layer groups 210 in the height direction of the cabinet 100. After the airflow flows into the heat dissipation duct 120 from the air outlet, it flows through the multiple cell layer groups 210 from the other side in the depth direction of the cabinet 100 and the two sides in the width direction of the cabinet 100, and flows into the return air outlet through the air duct gap 230.

[0113] By providing the refrigeration unit 300, the gas in the energy storage battery cabinet 1 is driven to circulate, and heat can be exchanged with the gas in the energy storage battery cabinet 1 to reduce the temperature of the gas in the energy storage battery cabinet 1, so that the low-temperature gas in the energy storage battery cabinet 1 can cool and dissipate the heat of the battery cells 200 in the energy storage battery cabinet 1, thereby avoiding heat accumulation of the battery cells 200 of the energy storage battery cabinet 1 to cause thermal runaway, thereby improving the safety of the energy storage battery cabinet 1.

[0114] Since there is a duct gap 230 between the cells 200 of two adjacent cell layer groups 210, the heat exchange area between the gas in the energy storage battery cabinet 1 and each cell 200 is larger, thereby improving the heat exchange efficiency. In addition, the refrigeration unit 300 is located on one side of the cabinet 100 in the depth direction of the cabinet 100, so the refrigeration unit 300 will not arrange the cell layer groups 210 along the height of the cabinet 100, which can increase the number of cell layer groups 210, thereby increasing the number of cells 200, thereby improving the volume utilization rate of the cells 200 of the energy storage battery cabinet 1.

[0115] According to some specific embodiments of the present invention, Figure 1 , Figure 2 and Figure 5 As shown, the cabinet 100 has a cabinet door 110 on one side in the depth direction thereof, and the energy storage battery cabinet 1 further includes a refrigeration unit 300, which is installed in the cabinet 100. The refrigeration unit 300 is installed on the cabinet door 110, and the plurality of battery cell layer groups 210 enter and exit the cabinet 100 by opening the cabinet door 110.

[0116] By providing the refrigeration unit 300, the gas in the energy storage battery cabinet 1 is driven to circulate, and heat can be exchanged with the gas in the energy storage battery cabinet 1 to reduce the temperature of the gas in the energy storage battery cabinet 1, so that the low-temperature gas in the energy storage battery cabinet 1 can cool and dissipate the heat of the battery cells 200 in the energy storage battery cabinet 1, thereby avoiding heat accumulation of the battery cells 200 of the energy storage battery cabinet 1 to cause thermal runaway, thereby improving the safety of the energy storage battery cabinet 1.

[0117] In addition, the refrigeration unit 300 can be directly accessed by opening the cabinet door 110, which is convenient for later maintenance of the refrigeration unit 300. Moreover, the refrigeration unit 300 is not installed on the cabinet body 100, and will not interfere with the disassembly and assembly of the battery layer group 210, thereby reducing the difficulty of disassembly and assembly.

[0118] According to some specific embodiments of the present invention, Figure 1 , Figure 2 and Figure 5 As shown, the cabinet door 110 is provided with an external circulation air inlet 130 , an external circulation air outlet 140 and an exhaust device 150 .

[0119] In this way, the air in the cabinet 100 can be replaced to prevent hot air from accumulating in the cabinet 100, thereby reducing the phenomenon of overheating of the battery cell 200 and thermal runaway, and the external circulation air inlet 130, the external circulation air outlet 140 and the exhaust device 150 are directly installed on the cabinet door 110, so when the cabinet door 110 is opened, the two ends of the external circulation air inlet 130, the two ends of the external circulation air outlet 140 and the two ends of the exhaust device 150 can be cleaned, and cleaning is more convenient.

[0120] In addition, the external circulation air inlet 130, the external circulation air outlet 140 and the exhaust device 150 are arranged along the height direction of the cabinet 100, so it is easy to distinguish the external circulation air inlet 130, the external circulation air outlet 140 and the exhaust device 150, which is more convenient during assembly.

[0121] According to some specific embodiments of the present invention, Figure 1 , Figure 2 and Figure 5 As shown, the cabinet door 110 is provided with a maintenance door 160 which can be opened and closed relative to the cabinet door 110 , and the maintenance door 160 is located at a lower portion of the cabinet door 110 in a height direction of the cabinet body 100 .

[0122] Among them, the maintenance door 160 can be used to maintain the control circuit in the energy storage battery cabinet 1. When the energy storage battery cabinet 1 is subsequently maintained, there is no need to open the main body of the cabinet door 110, so the battery cell 200 will not be directly exposed to the air, and the safety can be greatly improved. In addition, since the maintenance door 160 is located at the lower part of the cabinet door 110 in the height direction of the cabinet body 100, the cabinet door 110 is at a higher height, which is convenient for opening and closing, and the battery cell 200 can be easily placed in or taken out.

[0123] The energy storage system 2 according to an embodiment of the present invention is described below with reference to the accompanying drawings. Figure 4 As shown, the energy storage system 2 includes at least one energy storage battery cabinet 1 according to an embodiment of the present invention.

[0124] The energy storage system 2 according to the embodiment of the present invention, by utilizing the energy storage battery cabinet 1 according to the above embodiment of the present invention, controls the size parameters of the cabinet body 100 and the size parameters of the battery cell 200, has the advantages of high energy density and large battery cell volume utilization, and can also take into account the output voltage of the energy storage system 2.

[0125] Other structures and operations of the energy storage battery cabinet 1 and the energy storage system 2 having the same according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0126] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0127] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An energy storage battery cabinet, It is characterized in that include: A cabinet, wherein the width W1 of the cabinet, the depth D1 of the cabinet and the height H1 of the cabinet satisfy the following conditions: 0.8≤W1 / D1≤1.2, 0.8≤(W1+D1) / H1≤1.2; A plurality of battery cells, wherein the plurality of battery cells are arranged in the cabinet, and the length L of the battery cell, the thickness D of the battery cell and the width H of the battery cell satisfy: (D+H) / L≤0.2; Wherein, the volume V1 of each of the battery cells and the volume V3 of the cabinet satisfy: 0.0004≤V1 / V3≤0.001; The sum V2 of the volumes of the plurality of battery cells and the volume V3 of the cabinet satisfy: 0.35≤V2 / V3≤0.

5.

2. The energy storage battery cabinet according to claim 1, It is characterized in that The battery cell is configured in a rectangular parallelepiped shape.

3. The energy storage battery cabinet according to claim 1, It is characterized in that The length L of the battery cell, the thickness D of the battery cell and the width H of the battery cell satisfy: 400mm≤L≤1200mm, 10mm≤D≤40mm, 60mm≤H≤150mm.

4. The energy storage battery cabinet according to claim 1, It is characterized in that The length L of the battery cell, the thickness D of the battery cell and the width H of the battery cell satisfy: 800mm≤L≤970mm, 10mm≤D≤30mm, 80mm≤H≤130mm.

5. The energy storage battery cabinet according to claim 1, It is characterized in that The width W1 of the cabinet, the depth D1 of the cabinet and the height H1 of the cabinet satisfy: 600 mm≤W1≤1200 mm, 700 mm≤D1≤1250 mm, 1300 mm≤H1≤2600 mm.

6. The energy storage battery cabinet according to claim 1, It is characterized in that The length L of the battery cell and the width W1 of the cabinet satisfy: 0.35≤L / W1<1.

7. The energy storage battery cabinet according to claim 1, It is characterized in that Also includes: A plurality of battery layer groups are stacked along the height direction of the cabinet, and each of the battery layer groups includes at least one battery cell in one direction of the width direction and the depth direction of the cabinet and includes a plurality of battery cells in another direction.

8. The energy storage battery cabinet according to claim 7, It is characterized in that The length direction of the battery cell is arranged along the width direction of the cabinet, the thickness direction of the battery cell is arranged along the depth direction of the cabinet, and the width direction of the battery cell is arranged along the height direction of the cabinet.

9. The energy storage battery cabinet according to claim 7, It is characterized in that The number of the battery core layer groups is 8 to 18.

10. The energy storage battery cabinet according to claim 7, It is characterized in that The multiple battery layer groups arranged in the height direction of the cabinet have an overall width of W2, a depth of D2, and a height of H2, wherein 500mm≤W2≤1100mm; 450mm≤D2≤1000mm; 1150mm≤H2≤2450mm.

11. The energy storage battery cabinet according to claim 7, It is characterized in that A plurality of said battery core layers constitute a battery core unit; or A plurality of the battery layer groups constitute a plurality of battery units, and the plurality of battery units are arranged in the height direction of the cabinet; Wherein, each of the battery core units includes a plurality of the battery core layer groups, and two adjacent battery core layer groups of each of the battery core units abut against each other.

12. The energy storage battery cabinet according to claim 11, It is characterized in that There is an air duct gap between the cells of two adjacent cell layer groups of each cell unit.

13. The energy storage battery cabinet according to claim 12, It is characterized in that The dimension of the air duct gap in the height direction of the cabinet is 5 mm to 20 mm.

14. The energy storage battery cabinet according to claim 11, It is characterized in that Each of the battery core layer groups further comprises: A first bottom plate and a second bottom plate, wherein the first bottom plate and the second bottom plate are spaced apart along one of the width direction and the depth direction of the cabinet, and for two adjacent cell layer groups of each cell unit, the first bottom plate and the second bottom plate of one cell layer group abut against the cells of the other cell layer group, and a duct gap is formed between the first bottom plate and the second bottom plate.

15. The energy storage battery cabinet according to claim 14, It is characterized in that Each of the battery core layer groups further comprises: A first side panel and a second side panel, wherein the first side panel and the second side panel are spaced apart in the other of a width direction of the cabinet and a depth direction of the cabinet, two ends of the first bottom panel are respectively connected to one end of the first side panel and one end of the second side panel, and two ends of the second bottom panel are respectively connected to the other end of the first side panel and the other end of the second side panel; Among them, for the two battery cell layer groups adjacent to each other in the height direction of the cabinet, the first bottom plate of one battery cell layer group respectively abuts against the first side plate and the second side plate of the other battery cell layer group, and the second bottom plate of one battery cell layer group respectively abuts against the first side plate and the second side plate of the other battery cell layer group.

16. The energy storage battery cabinet according to claim 15, It is characterized in that The first bottom plate and the second bottom plate are both provided with one of a limiting column and a limiting hole, and the first side plate and the second side plate are both provided with the other of the limiting column and the limiting hole; Wherein, for two battery cell layer groups adjacent to each other in the height direction of the cabinet, the limiting pillars of one battery cell layer group are matched with the limiting holes of the other battery cell layer group.

17. The energy storage battery cabinet according to claim 16, It is characterized in that The one of the limiting column and the limiting hole is distributed at two ends of the first bottom plate and two ends of the second bottom plate; The other of the limiting columns and the limiting holes is distributed at two ends of the first side plate and two ends of the second side plate.

18. The energy storage battery cabinet according to claim 15, It is characterized in that For two battery cell layer groups adjacent to each other in the height direction of the cabinet, the first side plate of the other battery cell layer group is fastened to the first bottom plate and the second bottom plate of the one battery cell layer group by a first fastener, and the second side plate of the other battery cell layer group is fastened to the first bottom plate and the second bottom plate of the one battery cell layer group by a second fastener.

19. The energy storage battery cabinet according to claim 18, It is characterized in that The first fasteners are distributed at both ends of the first side plate; The second fasteners are distributed at two ends of the second side plate.

20. The energy storage battery cabinet according to claim 11, It is characterized in that Each of the battery cell units comprises a base and a plurality of battery cells of the battery cell unit are supported on the base.

21. The energy storage battery cabinet according to claim 20, It is characterized in that At least one restraint belt is arranged above each of the battery cell units, and both ends of each of the restraint belts are respectively connected to pull rods, and the lower end of each of the pull rods is connected to the base of the battery cell unit.

22. The energy storage battery cabinet according to claim 7, It is characterized in that Also includes: A refrigeration unit, the refrigeration unit is installed in the cabinet and is located on one side of the cabinet in the depth direction of the cabinet, the refrigeration unit has an air outlet and an air return outlet, a heat dissipation air duct connected to the air outlet is constructed on one side of the cabinet in the height direction of the cabinet, and an air duct gap is provided between the battery cells of two adjacent battery cell layer groups in the height direction of the cabinet; Among them, after the airflow flows into the heat dissipation duct from the air outlet, it flows through the multiple battery layer groups from the other side in the depth direction of the cabinet and the two sides in the width direction of the cabinet, and flows into the return air outlet through the duct gap.

23. The energy storage battery cabinet according to claim 7, It is characterized in that The cabinet body has a cabinet door on one side in the depth direction thereof; The energy storage battery cabinet further comprises a refrigeration unit, which is installed in the cabinet; Wherein, the refrigeration unit is installed on the cabinet door, and the multiple battery cell layer groups enter and exit the cabinet by opening the cabinet door.

24. The energy storage battery cabinet according to claim 23, It is characterized in that The cabinet door is provided with an external circulation air inlet, an external circulation air outlet and an exhaust device, and the external circulation air inlet, the external circulation air outlet and the exhaust device are arranged along the height direction of the cabinet body.

25. The energy storage battery cabinet according to claim 23, It is characterized in that The cabinet door is provided with a maintenance door which can be opened and closed relative to the cabinet door, and the maintenance door is located at the lower part of the cabinet door in the height direction of the cabinet body.

26. An energy storage system, It is characterized in that Comprising at least one energy storage battery cabinet according to any one of claims 1-25.

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