Battery modules and energy storage systems

Abstract

The technical challenge we aim to solve with regard to battery modules is to provide a battery module that improves cooling efficiency. [Solution] A battery module (1000) is provided, comprising a plurality of secondary batteries (100); and a housing (1200) for housing the plurality of secondary batteries (100), wherein the housing (1200) includes a first cooling plate (310) that supports the lower part of the plurality of secondary batteries (100); and one or more second cooling plates (320) formed in connection with the first cooling plate (310) and surrounding at least a portion of the sides of the plurality of secondary batteries (100).

Description

Technical Field

[0005] , , ,

[0001] The present disclosure relates to a battery module and / or an energy storage system with improved cooling efficiency.

[0002] Reference to related applications This application claims priority based on Korean Patent Application No. 10-2024-0149660, filed with the Korean Intellectual Property Office on October 29, 2024, and incorporates the entire disclosure thereof herein by reference.

Background Art

[0003] A secondary battery is a battery that can be charged and discharged, unlike a primary battery that cannot be charged. Low-capacity secondary batteries are used in portable small electronic devices such as smartphones, feature phones, notebook computers, digital cameras, and video cameras, and high-capacity batteries are widely used as power sources for motor drives such as hybrid vehicles and electric vehicles, and batteries for power storage. Such a secondary battery includes electrodes including a positive electrode and / or a negative electrode, an electrode assembly including the electrodes, a case that houses the same, electrode terminals connected to the electrode assembly, and the like.

[0004] With the increasing demand for secondary batteries, the use in the form of modules including a plurality of secondary batteries rather than a single secondary battery is increasing. A battery module generally includes a plurality of secondary batteries. A battery module can be used by electrically connecting a plurality of secondary batteries. Patent Document 1 discloses a battery module including a holder that is disposed between a plurality of cylindrical battery cells and is cooled by directly contacting the side surfaces of the battery cells.

[0005] The above-described information disclosed in the background art of such an invention is only for improving the understanding of the background of the present invention, and thus may include information that does not constitute the prior art.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Korean Published Patent Publication No. 10-2015-0048501 [Overview of the project] [Problems that the invention aims to solve]

[0007] One embodiment of the present invention is aimed at providing a battery module including a cooling plate and / or an energy storage system including such a battery module.

[0008] For example, one embodiment of the present invention is intended to provide a battery module including a cooling plate provided on the bottom and / or side, and / or an energy storage system including such a battery module.

[0009] One embodiment of the present invention is intended to provide a battery module including a cooling plate that serves as a housing and / or an energy storage system including such a battery module.

[0010] However, the technical problems that the present invention aims to solve are not limited to those described above, and other problems not mentioned can be clearly understood by those skilled in the art from the description of the invention below. [Means for solving the problem]

[0011] A battery module according to one embodiment of the present invention for solving technical problems includes a plurality of secondary batteries; and a housing for housing the plurality of secondary batteries, the housing including a first cooling plate supporting the lower part of the plurality of secondary batteries; and one or more second cooling plates formed in connection with the first cooling plate and surrounding at least a portion of the sides of the plurality of secondary batteries.

[0012] An energy storage system according to one embodiment of the present invention for solving technical problems includes a plurality of battery modules; and a rack for housing the plurality of battery modules, wherein each battery module includes a plurality of secondary batteries; and a housing for housing the plurality of secondary batteries, the housing including a first cooling plate for supporting the lower part of the plurality of secondary batteries; and one or more second cooling plates formed in connection with the first cooling plate and surrounding at least a portion of the sides of the plurality of secondary batteries. [Effects of the Invention]

[0013] According to one embodiment of the present invention, a battery module and / or energy storage system with improved cooling efficiency can be provided.

[0014] According to one embodiment of the present invention, it is possible to provide a battery module and / or energy storage system with reduced manufacturing costs.

[0015] According to one embodiment of the present invention, a battery module and / or energy storage system can be provided that can reduce the number of components.

[0016] However, the effects that can be obtained through the present invention are not limited to those described above, and other technical effects not mentioned can be clearly understood by those skilled in the art from the description of the invention below. [Brief explanation of the drawing]

[0017] The drawings accompanying this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention described later, serve to further illustrate the technical concept of the present invention. Therefore, the present invention should not be construed as being limited only to the matters described in such drawings.

[0018] [Figure 1] Figure 1 is a perspective view of a battery module according to one embodiment of the present invention. [Figure 2] Figure 2 is a perspective view of a secondary battery according to one embodiment of the present invention. [Figure 3] FIG. 3 is a cross-sectional view of a secondary battery according to an embodiment of the present invention. [Figure 4] FIG. 4 is a perspective view of a secondary battery according to an embodiment of the present invention. [Figure 5] FIG. 5 is a cross-sectional view of a battery module according to an embodiment of the present invention. [Figure 6] FIG. 6 is a perspective view of a housing according to an embodiment of the present invention. [Figure 7] FIG. 7 is a perspective view of a housing according to an embodiment of the present invention. [Figure 8] FIG. 8 is a cross-sectional view of a battery module according to an embodiment of the present invention. [Figure 9] FIG. 9 is a cross-sectional view of a battery module according to an embodiment of the present invention. [Figure 10] FIG. 10 is a cross-sectional view of a battery module according to an embodiment of the present invention. [Figure 11] FIG. 11 is a perspective view of an energy storage system according to an embodiment of the present invention. [Figure 12] FIG. 12 is a view showing an enlarged region indicated by M in FIG. 11.

Embodiments for Carrying Out the Invention

[0019] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Prior to this, terms and words used herein and in the claims should not be interpreted in a manner limited to their ordinary or dictionary meanings, but rather should be interpreted in a manner consistent with the technical idea of ​​the present invention, based on the principle that inventors may appropriately define the concepts of terms in order to best describe their invention. Accordingly, it should be understood that the embodiments described herein and the configurations shown in the drawings represent only some of the most preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and that there may be various equivalents and modifications that can substitute for them at the time of filing. Also, where used herein, "comprise, include" and / or "comprising, including" specify the presence of the shapes, figures, stages, actions, members, elements and / or groups thereof mentioned, but do not exclude the presence or addition of one or more other shapes, figures, actions, members, elements and / or groups thereof. Also, when describing embodiments of the present invention, "may" and "may include" "one or more embodiments of the present invention."

[0020] Furthermore, to aid in understanding the invention, the accompanying drawings may not be shown to actual scale, and the dimensions of some components may be exaggerated. Also, the same component may be assigned the same reference numeral in different embodiments.

[0021] The statement that two comparison objects are "identical" means that they are "substantially identical." Therefore, substantial identity may include deviations that are considered low in this industry, for example, deviations of 5% or less. Furthermore, the uniformity of a parameter within a given domain may mean uniformity from an average perspective.

[0022] Although terms such as "first," "second," etc., are used to describe various components, these components are, of course, not limited by these terms. These terms are used solely to distinguish one component from another, and unless otherwise stated, the first component may be the second component.

[0023] Throughout the specification, unless otherwise stated, each component may be singular or plural.

[0024] The placement of any component "above (or below)" or "above (or below)" a component may mean not only that any component is placed in contact with the top (or bottom) surface of the component, but also that other components may be interposed between the component and any component placed on (or below) it.

[0025] Furthermore, when it is stated that any component is “connected,” “joined,” or “connected” to another component, it should be understood that the components may be directly connected to or joined to one another, but may also be “interposed” between each component, or each component may be “connected,” “joined,” or “connected” through another component. Also, when it is said that any part is electrically coupled to another part, this includes not only cases where they are directly connected, but also cases where they are connected with another element in between.

[0026] Throughout the specification, when we say "A and / or B," it means A, B, or A and B unless otherwise specified. That is, "and / or" includes all or any combination of the enumerated items. When we say "C to D," it means C or greater and D or less, unless otherwise specified.

[0027] When syntax such as "at least one of A, B, and C", "at least one of A, B, or C", "at least one selected from the group A, B, and C", or "at least one selected from A, B, and C" is used to specify an inventory of elements A, B, and C, the syntax can refer to any suitable combination.

[0028] The term “use” may be considered synonymous with the term “utilize.” As used herein, “substantially,” “about,” and similar terms are used as approximations, not terms of degree, to account for the inherent variation in measured or calculated values ​​as perceived by a general expert in the art.

[0029] In this specification, terms such as first, second, third, etc., may be used to describe various elements, components, regions, layers, and / or sections, but these elements, components, regions, layers, and / or sections should not be limited by these terms. The terms are used to distinguish one element, component, region, drawing layer, or section from other elements, components, regions, drawing layers, or sections. Accordingly, the first elements, components, regions, layers, or sections discussed below may be named second elements, components, regions, layers, or sections without departing from the teaching of the exemplary embodiments.

[0030] As shown in the drawings, spatial relative terms such as “beneath,” “below,” “lower,” “above,” and “upper” may be used herein for ease of explanation to describe the relationship between one element or feature and another. Spatially relative positions are understood to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figure. For example, if the device in the drawing is inverted, an element described as “beneath” or “below” another element will be understood as “above” or “upper” a different element. Thus, the term “beneath” can encompass both upward and downward directions. The terms used herein are for describing embodiments of the present disclosure and are not intended to limit the present disclosure.

[0031] In this specification, the x-axis represents the width direction of the battery module 1000. In this specification, the y-axis represents the length direction of the battery module 1000, with the y-axis perpendicular to the x-axis. In this specification, the z-axis represents the height direction of the battery module 1000, with the z-axis perpendicular to both the x-axis and the y-axis.

[0032] Figure 1 is a perspective view of the battery module.

[0033] In Figure 1, 1000 represents battery module 1000.

[0034] The battery module 1000 includes a plurality of secondary batteries 100; and a housing 1200 that houses the plurality of secondary batteries 100.

[0035] The battery module 1000 includes a plurality of secondary batteries 100. The secondary batteries 100 can function as unit structures that store and supply power in the battery module 1000.

[0036] The secondary battery 100 includes, for example, a battery cell in which the case 20 of the secondary battery 100 (see Figure 2) is formed in a rectangular shape. However, the shape of the secondary battery 100 applicable to the battery module 1000 according to one embodiment of the present invention is not limited to this. For example, the secondary battery 100 may be formed in various forms such as pouch type, cylindrical type, coin type, etc. Below, the case in which the battery cell included in the battery module 1000 is formed in a rectangular shape will be described as an example.

[0037] Multiple secondary batteries 100 are arranged inside the housing 1200. In this configuration, the housing 1200 forms the general appearance of the battery module 1000. The housing 1200 can function as a structure that supports the multiple secondary batteries 100 as a whole.

[0038] The housing 1200 accommodates multiple secondary batteries 100 in its internal space.

[0039] Multiple secondary batteries 100 are arranged in a first direction within the internal space of the housing 1200.

[0040] The first direction may be the same direction as the longitudinal direction Y of the battery module 1000. For example, the secondary battery 100 includes a first side and a second side that face each other. In this case, the first side and the second side include a broad surface on the side of the secondary battery 100. For example, multiple secondary batteries 100 may be arranged so that the first side of one secondary battery faces the second side of an adjacent battery cell. In this case, the first direction is the direction from the first side to the second side.

[0041] The housing 1200 may include an end plate 1210, a side plate 1220, and a bottom plate 1230 that form an internal space for housing the secondary battery 100.

[0042] The end plate 1210 forms a portion of the side surface of the housing 1200. For example, the end plate 1210 forms the side surface of the housing 1200 that is located in a first direction. This allows the end plate 1210 to be formed opposite a wider surface on the side surface of the secondary battery 100. For example, the end plate 1210 can be formed as a pair of two end plates facing each other, forming both sides of the housing 1200.

[0043] The secondary battery 100 may undergo a swelling phenomenon, where it expands due to repeated charging and discharging. In this case, the swelling phenomenon may be more pronounced on relatively wider sides of the secondary battery 100. The end plate 1210 can restrain the secondary battery 100 from expanding and / or support the appearance of the housing 1200, even if the swelling phenomenon occurs in the secondary battery 100.

[0044] The side plates 1220 form another part of the side surface of the housing 1200. For example, the side plates 1220 form the side surface of the housing 1200 located in a second direction. In this case, the second direction may be the same direction as the width direction (X-axis) of the battery module 1000. In this case, the second direction may be perpendicular to the first direction. For example, the side plates 1220 can be formed by a pair of two side plates facing each other, forming the other two sides of the housing 1200. In this case, each of the side plates 1220 may be connected on one side and the other side to a pair of end plates 1210.

[0045] The lower plate 1230 forms the lower surface of the housing 1200. The lower plate 1230 can, for example, support multiple secondary batteries 100 at the bottom. The lower plate 1230 may be connected to the end plate 1210 and the side plate 1220.

[0046] Through this configuration, the housing 1200 can form an internal space created by the end plate 1210, the side plate 1220, and the lower plate 1230.

[0047] Figure 2 is a perspective view of a secondary battery according to one embodiment of the present invention.

[0048] Figure 3 is a cross-sectional view of a secondary battery according to one embodiment of the present invention.

[0049] Figure 4 is a perspective view of a secondary battery according to one embodiment of the present invention.

[0050] A secondary battery 100 according to one embodiment of the present invention may be formed in various forms of prismatic batteries, as shown in Figures 2 to 4.

[0051] For example, the secondary battery 100 may be formed with an appearance in which the length in the width direction (X-axis) is longer than the length in the height direction (Z-axis), as shown in Figure 2.

[0052] Alternatively, for example, the secondary battery 100 may be formed with an appearance in which the length in the height direction (Z-axis) is longer than the length in the width direction (X-axis), as shown in Figure 4. In this way, the secondary battery 100 can be formed to be relatively long in the height direction (Z-axis) and to form a tall cell shape.

[0053] The secondary battery 100 may include one or more electrode assemblies formed by winding together a positive electrode 11, a negative electrode 12, and a separator membrane 13 as an insulator between the positive electrode 11 and the negative electrode 12, a case 20 in which the electrode assemblies are housed, and a cap assembly 30 coupled to the opening of the case 20.

[0054] In the following description, the secondary battery 100 will be described as a prismatic lithium-ion secondary battery. However, the present invention is not limited thereto, and the secondary battery 100 may be a lithium polymer battery or a cylindrical battery.

[0055] The positive electrode 11 and the negative electrode 12 may include a coated portion which is a region on which an active material is applied to a current collector formed from a thin metal foil, and plain portions 11a and 12a which are regions not coated with the active material.

[0056] The positive electrode 11 and the negative electrode 12 may be wound up after a separator membrane 13 acting as an insulator is interposed between them. However, the present invention is not limited thereto, and the electrode assembly may have a structure in which a positive electrode 11 and a negative electrode 12, each consisting of multiple sheets, are alternately stacked with a separator membrane 13 in between.

[0057] The case 20 forms the overall appearance of the secondary battery 100 and may be made of a conductive metal such as aluminum, aluminum alloy, or nickel-plated steel. The case 20 can also provide a space for housing the electrode assembly.

[0058] The cap assembly 30 may include a cap plate 31 that covers the opening of the case 20, and the case 20 and the cap plate 31 may be made of a conductive material. Here, the terminal 21 electrically connected to the positive electrode 11 or the negative electrode 12 may be installed so as to pass through the cap plate 31 and protrude outward.

[0059] Furthermore, the terminals 21 protruding from the outside of the cap plate 31 may be formed in pairs. The pair of terminals 21 can be connected to the positive electrode 11 and the negative electrode 12, respectively, and function as the positive and negative terminals of the secondary battery 100.

[0060] More specifically, the terminal 21 may be electrically connected to a current collector that includes first and second current collectors (hereinafter referred to as positive and negative current collectors) welded to the positive or negative plain portion 11a or negative plain portion 12a. For example, a pair of terminals 21 may be welded to the positive and negative current collectors 40 and 50, respectively. However, the present invention is not limited thereto, and the terminal 21 and the positive and negative current collectors 40 and 50 may also be formed by integrally joining them. The outer circumferential surface of the upper column of the terminal 21 may be threaded and fixed to the cap plate 31 with a nut.

[0061] However, the present invention is not limited thereto, and the terminal 21 may have a rivet structure and be riveted together, or welded to the cap plate 31.

[0062] Furthermore, the cap plate 31 may be made of a thin plate and may be coupled to the opening of the case 20. The cap plate 31 may have an electrolyte inlet 32 ​​on which a sealing plug 33 can be installed, and a vent 34 may be installed.

[0063] The vent 34 may open and close in conjunction with changes in the internal pressure of the case 20. That is, the vent 34 can remain closed during normal operation of the electrode assembly, thereby sealing the case 20. The vent 34 can be opened when the internal pressure of the case 20 rises above a predetermined level due to overcharging or fire, allowing exhaust materials such as flames and gases to be discharged from inside the case 20 to the outside.

[0064] Furthermore, an insulating member may be installed between the electrode assembly and the cap plate 31. Here, the insulating member may include first and second lower insulating members 60 and 70, and each of the first and second lower insulating members 60 and 70 can be installed between the electrode assembly and the cap plate 31.

[0065] Furthermore, according to this embodiment, one end of a separating member may be installed between the insulating member and the terminal 21 so as to face one side of the electrode assembly.

[0066] Here, the separating member may include first and second separating members 80 and 90.

[0067] Therefore, one end of the first and second separating members 80 and 90, which can be installed between the first and second lower insulating members 60 and 70 and the positive and negative electrode terminals 21 and 22 so as to face one side of the electrode assembly, may be installed.

[0068] In other words, the terminals 21, which are welded to the positive and negative current collectors 40 and 50, can be connected to one end of the first and second lower insulating members 60 and 70 and the first and second separating members 80 and 90.

[0069] Figure 5 is a cross-sectional view of a battery module according to one embodiment of the present invention.

[0070] A battery module 1000 according to one embodiment of the present invention includes a plurality of secondary batteries 100; and a housing 300 for housing the plurality of secondary batteries 100, the housing 300 including a first cooling plate 310 for supporting the lower part of the plurality of secondary batteries 100; and one or more second cooling plates 320 formed in connection with the first cooling plate 310 and surrounding at least a portion of the sides of the plurality of secondary batteries 100.

[0071] The battery module 1000 includes a plurality of secondary batteries 100 and a housing 300. In the description of the battery module 1000, any information that overlaps with the information described with reference to Figures 1 to 4 may be omitted.

[0072] The battery module 1000 may include, for example, multiple secondary batteries 100 as described with reference to Figures 2 to 4.

[0073] Furthermore, for example, the battery module 1000 may include one or more battery stacks 200. The battery stack 200 is formed by arranging a plurality of secondary batteries 100 in a first direction. Two or more battery stacks 200 may be arranged in a second direction, spaced apart from each other at predetermined intervals.

[0074] In this process, the secondary battery 100 may generate heat during the charge-discharge process and / or as the charge-discharge cycle is repeated. If this heat is not cooled, the internal temperature of the battery module 1000 will continue to rise. Furthermore, the increased heat may cause functional, efficiency, and / or safety problems while damaging the components of the battery module 1000.

[0075] Furthermore, as explained with reference to Figure 4, the secondary battery 100 may be formed to be longer in the height direction. In this case, if cooling is carried out only at the bottom of the secondary battery 100, cooling will not be efficiently performed in the middle and upper parts of the secondary battery 100. Moreover, a temperature difference may occur between the upper and lower parts of the secondary battery 100, which may lead to safety problems.

[0076] Therefore, a method is required to maintain the temperature inside the battery module 1000 within a certain range, regardless of the shape or size of the secondary battery 100.

[0077] For this purpose, a battery module 1000 according to one embodiment of the present invention includes a housing 300 which includes a first cooling plate 310 and a second cooling plate 320.

[0078] The first cooling plate 310 can form the lower part of the housing 300.

[0079] For example, the first cooling plate 310 is located below a plurality of secondary batteries 100 and can support the plurality of secondary batteries 100 from below. For example, the first cooling plate 310 can take over the role of the lower plate 1230 described with reference to Figure 1. That is, the first cooling plate 310 according to one embodiment of the present invention can simultaneously perform the role of the lower plate 1230 and the role of a cooling plate.

[0080] For example, if the secondary battery 100 is formed in a rectangular shape, the first cooling plate 310 may be formed in a substantially rectangular plate shape. For example, the first cooling plate 310 may be formed in a rectangular shape that is relatively long in the length direction (Y-axis) of the battery module 1000 and relatively short in the width direction (X-axis) of the battery module 1000.

[0081] Through this, the first cooling plate 310 can support a plurality of secondary batteries 100 arranged in a first direction and / or a plurality of battery stacks 200 arranged in a second direction from below.

[0082] The second cooling plate 320 can form at least a portion of the side of the housing 300.

[0083] For example, the second cooling plate 320 can support multiple secondary batteries 100 from the side while surrounding at least a portion of the sides of the multiple secondary batteries 100. For example, the second cooling plate 320 can take over the role of the side plate 1220 described with reference to Figure 1. That is, the second cooling plate 320 according to one embodiment of the present invention can cool the battery module 1000 while performing the role of the side plate 1220.

[0084] For example, if the secondary battery 100 is formed in a rectangular shape, the second cooling plate 320 may be formed in a substantially rectangular plate shape. For example, the second cooling plate 320 may be formed in a rectangular shape that is relatively long in the length direction (Y-axis) of the battery module 1000 and relatively short in the height direction (Z-axis) of the battery module 1000.

[0085] Furthermore, for example, the second cooling plate 320 may be formed in connection with the first cooling plate 310. For example, the second cooling plate 320 may extend from a surface that is formed longer from the first cooling plate 310. For example, the second cooling plate 320 may be bent and extended in the direction in which the first cooling plate 310 extends, or, for example, be bent and extended in a direction perpendicular to the first cooling plate 310.

[0086] For example, the second cooling plates 320 may be formed in pairs or in pairs. For example, the second cooling plates 320 may be formed in pairs (e.g., 321, 322 in Figure 5) positioned facing each other with the first cooling plate 310 in between.

[0087] In this case, the first cooling plate 310 and the second cooling plate 320 may be connected by welding. However, the method of connecting the first cooling plate 310 and the second cooling plate 320 is not limited to this, and for example, the first cooling plate 310 and the second cooling plate 320 may be connected by various types of joining methods such as bolting and fitting.

[0088] Furthermore, for example, the second cooling plate 320 can also perform the role of the end plate 1210 as described with reference to Figure 1. That is, the second cooling plate 320 according to one embodiment of the present invention can cool the battery module 1000 while performing the role of the end plate 1210.

[0089] The first cooling plate 310 and the second cooling plate 320 can each maintain a constant temperature of the battery module 1000. For example, the first cooling plate 310 and the second cooling plate 320 can effectively remove heat generated from the secondary battery 100 and / or the battery module 1000.

[0090] For example, at least one of the first cooling plate 310 and the second cooling plate 320 includes a cooling channel 340 (see Figure 6) through which a refrigerant for cooling the battery module 1000 circulates.

[0091] In this context, the refrigerant is a medium for cooling. The refrigerant includes, but is not limited to, cooling water.

[0092] For example, the cooling channel 340 may be formed by joining an upper plate and a lower plate, each forming a housing section with an indented structure. In this case, the housing sections of the upper plate and the lower plate may be formed in a corresponding manner to each other.

[0093] Alternatively, for example, the cooling channel 340 may be formed in the form of a pipe. In this case, at least one of the first cooling plate 310 and the second cooling plate 320 may include an upper plate and a lower plate to fix the cooling channel 340. The cooling channel 340 may be located between the upper plate and the lower plate.

[0094] The cooling channel 340 serves as a passage through which the refrigerant can circulate. The refrigerant, via the cooling channel 340, can maintain a constant temperature in the battery module 100 through heat exchange with the secondary battery 100.

[0095] In this case, the cooling channel 340 may be arranged to increase the area over which the refrigerant and the secondary battery 100 can exchange heat. For example, the cooling channel 340 is arranged so that the refrigerant flowing into the refrigerant inlet 341 (see Figure 6) circulates along at least a portion of the first cooling plate 310 and the second cooling plate 320, and then is discharged along the refrigerant outlet (342, see Figure 6). For example, the cooling channel 340 may be arranged in a winding zigzag shape to improve cooling efficiency.

[0096] In this case, the cooling channel 340 may be formed by a single pipe and arranged across the entire first cooling plate 310 and the second cooling plate 320. Alternatively, the cooling channel 340 may be formed by multiple pipes and arranged across each of the first cooling plate 310 and the second cooling plate 320.

[0097] Alternatively, for example, at least one of the first cooling plate 310 and the second cooling plate 320 has one or more cooling holes formed in it for cooling the battery module 1000.

[0098] The cooling holes are formed by penetrating at least one of the first cooling plate 310 and the second cooling plate 320. The cooling holes can form a mesh structure or a honeycomb structure in at least one of the first cooling plate 310 and the second cooling plate 320. Alternatively, multiple cooling holes may be formed spaced apart from at least one of the first cooling plate 310 and the second cooling plate 320.

[0099] The first cooling plate 310 and / or the second cooling plate 320 can dissipate heat generated from the battery module 1000 to the outside through cooling holes while maintaining the appearance of the housing 300.

[0100] For example, at least one of the first cooling plate 310 and the second cooling plate 320 may have cooling holes formed in it, including cooling channels. For example, the cooling holes may be formed in areas through which the cooling channels do not pass. For example, the cooling holes may be formed at points where the cooling efficiency of the refrigerant decreases. Through this, the battery module 1000 can further improve its cooling efficiency.

[0101] Thus, the housing 300 according to one embodiment of the present invention provides a solution for simultaneously cooling the bottom and sides of the battery module 1000. Through this, the battery module 1000 can increase its cooling area and improve its cooling efficiency compared to conventional designs. Furthermore, by providing a solution for cooling the sides of the secondary battery 100, the battery module 1000 can reduce the temperature difference that occurs between the upper and lower parts of the secondary battery 100 and / or the battery module 1000. This provides the battery module 1000 with an improved safety feature. In addition, the battery module 1000 can improve work efficiency by integrating the housing and the cooling plate.

[0102] The battery module 1000 may further include an insulating sheet 400. The insulating sheet 400 can prevent heat from being transferred between the secondary batteries 100.

[0103] The thermal insulation sheet 400 may contain thermal insulation material. For example, the thermal insulation sheet 400 may be formed by mixing a first thermal insulation material and a second thermal insulation material. Alternatively, for example, the thermal insulation sheet 400 may include a first layer (not shown) containing the first thermal insulation material and a second layer containing the second thermal insulation material. In this case, the first layer and the second layer may be formed by alternately laminating them. Alternatively, the first layer may be formed between two second layers.

[0104] For example, the first thermal insulation material may be at least one selected from the group consisting of aerogel, wet silica, dry silica, polyurethane, polystyrene, polyethylene, polyester, and combinations thereof.

[0105] For example, the second insulating material may be at least one selected from the group consisting of mica, sericite, talc, diatomaceous earth, bentonite, silicon, maifan stone, kaolin, polyimide, and polyethylene terephthalate, or a mixture of at least two or more.

[0106] For example, the heat insulating sheet 400 may be located between at least one of the multiple secondary batteries 100. For example, the heat insulating sheet 400 may be located between at least one of the multiple battery stacks 200. For example, the heat insulating sheet 400 may be located between the first battery stack 201 and the second battery stack 202.

[0107] Through this, the battery module 1000 can simultaneously prevent heat transfer and improve cooling efficiency.

[0108] The following provides a more detailed description of this battery module 1000.

[0109] Figure 6 is a perspective view of a housing according to one embodiment of the present invention.

[0110] Figure 7 is a perspective view of a housing according to one embodiment of the present invention.

[0111] A battery module 1000 according to one embodiment of the present invention includes a secondary battery 100 and a housing 300. The housing 300 includes a first cooling plate 310 and a second cooling plate 320.

[0112] As shown in Figures 6 and 7, the second cooling plate 320 includes a first side plate 321 and a second side plate 322 positioned opposite the first side plate 321.

[0113] For example, the first side plate 321 extends from one side of the first cooling plate 310 in the width direction (X-axis) of the battery module 1000. For example, the second side plate 322 extends from the other side of the first cooling plate 310 in the width direction (X-axis) of the battery module 1000. The first side plate 321 and the second side plate 322 can be formed separated by the width of the first cooling plate 310. The first side plate 321 and the second side plate 322 may be positioned facing each other.

[0114] The first side plate 321 and the second side plate 322 are each positioned on the sides of the multiple secondary batteries 100. The first side plate 321 and the second side plate 322 exchange heat with the secondary batteries 100 and / or the battery module 1000 on the sides of the multiple secondary batteries 100. Through this, the first side plate 321 and the second side plate 322 form the sides of the battery module 1000 and at the same time cool the battery module 1000.

[0115] For example, as shown in Figure 6, the housing 300 includes a first cooling plate 310, a second cooling plate 320, and an end plate 330.

[0116] The end plate 330 forms at least a portion of the side surface of the housing 300. Furthermore, the end plate 330 can prevent the secondary battery 100 from swelling if swelling occurs, thereby restraining the secondary battery 100. In this way, the end plate 330 supports the housing 300 and improves its rigidity.

[0117] The end plate 330 may be formed from a flat plate. The end plate 330 is connected to one side and / or the other side of the first cooling plate 310 in the longitudinal direction (Y-axis) of the battery module 1000. For example, the end plate 330 is bent and extends on one side and / or the other side of the first cooling plate 310. For example, the end plate 330 is connected perpendicularly to one side and / or the other side of the first cooling plate 310.

[0118] For example, the end plate 330 includes a first end plate 331 and a second end plate 332. The first end plate 331 connects one side of the first side plate 321 to one side of the second side plate 322. The second end plate 332 connects the other side of the first side plate 321 to the other side of the second side plate 322.

[0119] The end plate 330 supports both ends of multiple secondary batteries 100. For example, the end plate 330 supports both ends of multiple secondary batteries 100 arranged in a first direction.

[0120] For example, the end plate 330 may face each of the secondary batteries located at both ends of the multiple secondary batteries 100. For example, the first end plate 331 may face the secondary battery located at one end of the multiple secondary batteries 100 in the first direction, and the second end plate 332 may face the secondary battery located at the other end of the multiple secondary batteries 100 in the first direction.

[0121] Thus, the housing 300 may include an end plate 330 along with the first cooling plate 310 and the second cooling plate 320. Through this, the housing 300 can simultaneously improve the force supporting the battery module 1000 and the cooling efficiency.

[0122] Alternatively, for example, as shown in Figure 7, the housing 300 includes a first cooling plate 310 and a second cooling plate 320.

[0123] For example, the second cooling plate 320 includes a first side plate 321, a second side plate 322, a third side plate 323, and a fourth side plate 324.

[0124] The third side plate 323 connects one side of the first side plate 321 to one side of the second side plate 322. The fourth side plate 324 connects the other side of the first side plate 321 to the other side of the second side plate 322. The third side plate 323 and the fourth side plate 324 are formed facing each other.

[0125] In this configuration, the first side plate 321 and the second side plate 322 can cool the battery module 1000 via a cooling channel 340 through which the refrigerant circulates. For example, the refrigerant can flow in through the refrigerant inlet 341, circulate through the first side plate 321, the first cooling plate 310, and the second side plate 322, and then be discharged through the refrigerant outlet 342. Additionally, the third side plate 323 and the fourth side plate 324 can cool the battery module 1000 via cooling holes. Through this, the housing 300 can improve cooling efficiency while reducing flow resistance.

[0126] Alternatively, the first side plate 321 and the second side plate 322 can cool the battery module 1000 through cooling holes. Furthermore, the third side plate 323 and the fourth side plate 324 can cool the battery module 1000 through cooling channels 340. For example, refrigerant can flow in through the refrigerant inlet 341, circulate through the third side plate 323, the first cooling plate 310, and the fourth side plate 324, and then be discharged through the refrigerant outlet 342. Through this, the housing 300 provides a solution that reduces flow resistance and improves cooling efficiency while maintaining rigidity.

[0127] Through this structure, the housing 300 can maximize the cooling efficiency of the battery module 1000.

[0128] For example, the battery module 1000 further includes a flow path 350.

[0129] The flow path 350 is formed in the internal space of the housing 300. For example, the flow path 350 is formed in the internal space of the housing 300 along a first direction. The first direction includes, for example, the longitudinal direction (Y-axis) of the battery module 1000.

[0130] For example, the flow path 350 may be formed in the form of a pipe connecting a pair of end plates 330 formed on both sides. Alternatively, for example, the flow path 350 may be formed in the form of a pipe connecting a pair of side plates 323, 324 formed on both sides. Alternatively, for example, the flow path 350 may be formed in the form of a pipe connecting a pair of side plates 321, 322 formed on both sides.

[0131] For example, the flow path 350 may be provided between the first battery stack 201 and the second battery stack 202 when viewed from above. In this case, the flow path 350 may be provided on the top of the secondary battery 100 or on the side of the secondary battery 100.

[0132] Although not shown in Figures 6 and 7, the flow path 350 may be connected to a fire extinguishing agent storage tank located outside the housing 300 via a flow path pipe exposed to the outside of the housing 300. The flow path 350 can be supplied with fire extinguishing agent from the fire extinguishing agent storage tank.

[0133] The flow channel 350 may be formed of a heat-sensitive material that melts at a predetermined temperature or higher.

[0134] In this case, the predetermined temperature may be, for example, the ignition temperature of the secondary battery 100. The predetermined temperature is, for example, 100°C to 150°C. If the predetermined temperature is less than 100°C, the flow path 350 may melt during the charging and discharging process of the secondary battery 100. In this case, a malfunction occurs in which the battery module 1000 does not operate normally. Alternatively, if the predetermined temperature exceeds 150°C, a fire may break out from the secondary battery 100, and after some time, the flow path 350 may melt. In this case, the cooling effect of the battery module 1000 decreases due to the delay in suppressing the fire F. Therefore, it is preferable that the predetermined temperature is, for example, 100°C to 150°C.

[0135] For example, the heat-sensitive material may include PA12 material. Alternatively, the heat-sensitive material may include HDPE, LLDPE, LDPE, ABS, AMSAN, etc. For example, the flow path 350 may be formed in the shape of a tube made of PA12 material.

[0136] The flow path 350 melts at a temperature above a predetermined level, releasing the fire extinguishing agent present within it. Since the flow path 350 is located within the internal space of the housing 300, the fire extinguishing agent can be released into the internal space of the housing 300.

[0137] However, the form and / or arrangement of the channel 350 according to one embodiment of the present invention is not limited thereto. For example, the channel 350 may be installed outside the housing 1200 and capable of injecting a fire extinguishing agent into the housing 300. In this case, the channel 350 can spray the fire extinguishing agent into the housing 300 when the internal temperature of the housing 300 rises above a predetermined temperature. Thus, the channel 350 can be applied to the battery module 1000 in all forms and / or arrangements that enable the spraying of a fire extinguishing agent into the internal space of the housing 300.

[0138] The fire extinguishing agent may include, for example, a liquid fire extinguishing agent. For example, the fire extinguishing agent may include at least one of the following: sulfuric acid, potassium carbonate, sodium bicarbonate, aluminum sulfate, water, halons, halogen compounds, and combinations thereof.

[0139] Alternatively, the fire extinguishing agent may include, for example, a gaseous fire extinguishing agent and / or a solid fire extinguishing agent. For example, the fire extinguishing agent may include at least one of Novec 1230, nitrogen, solid aerosol, and combinations thereof.

[0140] Thus, the battery module 1000, by including the flow path 350, provides a solution that can prevent thermal runaway in the event of it occurring, thereby further improving safety.

[0141] Figure 8 is a cross-sectional view of a battery module according to one embodiment of the present invention.

[0142] A battery module 1000 according to one embodiment of the present invention includes a secondary battery 100 and a housing 300. As described with reference to Figures 1 to 7, the housing 300 includes a first cooling plate 310 and a second cooling plate 320.

[0143] For example, the battery module 1000 includes two or more battery stacks 200 arranged at a predetermined distance d from each other.

[0144] For example, the first cooling plate 310 further includes a first reinforcing member 410 provided at a predetermined interval d. The battery stacks 200 may be arranged at a predetermined interval d to prevent heat conduction between them and / or to leave a sweeping space that occurs during charging and discharging. In this case, the separation of the battery stacks 200 at the predetermined interval d may cause the first cooling plate 310 to be subjected to an uneven load. The first reinforcing member 410 enables the first cooling plate 310 to overcome the uneven load caused by the predetermined interval d.

[0145] Alternatively, for example, the first cooling plate 310 further includes a second reinforcing member 420 provided in a region corresponding to the area connected to the second cooling plate 320. The first cooling plate 310 may be subjected to uneven forces at the edge portion connected to the second cooling plate 320. The second reinforcing member 420 enables the second cooling plate 320 to overcome such forces. The second reinforcing member 420 may be formed, for example, on one side (e.g., 421) of the first cooling plate 310 and / or on the other side (e.g., 422) of the first cooling plate 310.

[0146] The first reinforcing member 410 and / or the second reinforcing member 420 may be made of any material that has higher rigidity than the first cooling plate 310. For example, the first reinforcing member 410 and / or the second reinforcing member 420 may be made of a material that has higher tensile strength than the first cooling plate 310. For example, the first reinforcing member 410 and / or the second reinforcing member 420 may include Al5051, Al5052, Al5053, Al6061, Al6062, Al6063, Al7075, SUS, etc.

[0147] Furthermore, the first cooling plate 310 may also include the first reinforcing member 410 and the second reinforcing member 420 simultaneously.

[0148] In this way, the first cooling plate 310 can improve the lower support function of the battery module 1000 by reinforcing the load through a highly rigid material.

[0149] Figure 9 is a cross-sectional view of a battery module according to one embodiment of the present invention.

[0150] A battery module 1000 according to one embodiment of the present invention includes a secondary battery 100 and a housing 300. As described with reference to Figures 1 to 7, the housing 300 includes a first cooling plate 310 and a second cooling plate 320.

[0151] For example, the battery module 1000 includes two or more battery stacks 200 arranged at a predetermined distance d from each other.

[0152] For example, the first cooling plate 310 is formed with a thickness h2 in the region corresponding to a predetermined interval d that is thicker than the thickness h1 in the region corresponding to the battery stack 200. The battery stacks 200 may be arranged spaced apart from each other by a predetermined interval d to prevent heat conduction between them and / or to leave a sweeping space that occurs during charging and discharging. In this case, the first cooling plate 310 may be subjected to an uneven load due to the separation of the battery stacks 200 by a predetermined interval d. The first cooling plate 310 is made thicker in the region corresponding to the predetermined interval d by making the thickness h2 relatively thicker, thereby enabling the first cooling plate 310 to overcome the uneven load.

[0153] Alternatively, for example, the first cooling plate 310 is formed with a thickness h3 in the area connected to the second cooling plate 320 that is greater than the thickness h1 in the area corresponding to the multiple secondary batteries 100. The first cooling plate 310 may be subjected to uneven forces at the edge portion connected to the second cooling plate 320. By forming the thickness h3 of such connection portion of the first cooling plate 310 to be relatively thick, the first cooling plate 310 is made capable of overcoming uneven loads.

[0154] Furthermore, the first cooling plate 310 can be formed such that h2 and h3 are all thicker than h1.

[0155] Furthermore, the first cooling plate 310 may include a first reinforcing member 410 and / or a second reinforcing member 420, and the thickness of the first cooling plate 310 in the region where the first reinforcing member 410 and / or the second reinforcing member 420 are located may also be increased.

[0156] In this way, the first cooling plate 310 can improve the lower support function of the battery module 1000 by adjusting the thickness of certain areas and reinforcing the load.

[0157] Figure 10 is a cross-sectional view of a battery module according to one embodiment of the present invention.

[0158] A battery module 1000 according to one embodiment of the present invention includes a secondary battery 100 and a housing 300. As described with reference to Figures 1 to 7, the housing 300 includes a first cooling plate 310 and a second cooling plate 320.

[0159] For example, the battery module 1000 further includes a reinforcing plate 430 that supports the lower part of the first cooling plate 310.

[0160] As shown in Figure 10, the reinforcing plate 430 can support all or part of the lower part of the first cooling plate 310. For this purpose, the reinforcing plate 430 may be formed to correspond to the size of the first cooling plate 310. It may also be formed to correspond to the shape of the reinforcing plate 430. Furthermore, the reinforcing plate 430 may be formed in a plate shape to easily support the plate-shaped first cooling plate 310.

[0161] In this case, the reinforcing plate 430 may be made of any material that has higher rigidity than the first cooling plate 310. For example, the reinforcing plate 430 may include Al5051, Al5052, Al5053, Al6061, Al6062, Al6063, Al7075, SUS, etc.

[0162] Furthermore, the reinforcing plate 430 can be applied to the first cooling plate 310 simultaneously with the first reinforcing member 410 and / or the second reinforcing member 420 as described with reference to Figure 8.

[0163] Furthermore, the reinforcing plate 430 can be applied simultaneously with the first cooling plate 310, whose thickness has been adjusted as described with reference to Figure 9.

[0164] Furthermore, the reinforcing plate 430 can be applied simultaneously with the first reinforcing member 410, the second reinforcing member 420, and / or the first cooling plate 310 with adjusted thickness, as described with reference to Figures 8 and 9.

[0165] Through this structure, the first cooling plate 310 can improve the lower support function of the battery module 1000.

[0166] Figure 11 is a perspective view of an energy storage system according to one embodiment of the present invention.

[0167] Figure 12 is a magnified view of the region indicated by M in Figure 11.

[0168] An energy storage system 2000 according to one embodiment of the present invention includes a plurality of battery modules 1000; and racks 2100, 2200 that house the plurality of battery modules 1000.

[0169] The battery module 1000 includes a plurality of secondary batteries 100; and a housing 300 that houses the plurality of secondary batteries 100, the housing 300 including a first cooling plate 310 that supports the lower part of the plurality of secondary batteries 100; and one or more second cooling plates 320 that are connected to the first cooling plate 310 and surround at least a portion of the sides of the plurality of secondary batteries 100.

[0170] Racks 2100 and 2200 provide space in which battery modules 1000 can be stacked. For example, racks 2100 and 2200 provide space in which battery modules 1000 can be stacked vertically.

[0171] In this case, the rack includes a support rack 2200 that extends vertically and is formed in the shape of a rod. Alternatively, the rack includes a support rack 2200 that extends vertically and is formed in the shape of a plate. The rack also includes a horizontal rack 2100 that extends horizontally and is formed in the shape of a plate.

[0172] For example, multiple support racks 2200 extend vertically to the ground and support the energy storage system 2000 as a whole.

[0173] For example, multiple horizontal racks 2100 are each connected to a support rack 2200 horizontally with respect to the ground. Each of the multiple horizontal racks 2100 may also be connected to a support rack 2200 vertically.

[0174] Through this, the rack may be formed in the form of a shelf in which the battery module 1000 can be accommodated overall.

[0175] The battery modules 1000 may be located on a horizontal rack 2100. One or more battery modules 1000 may be placed on a single horizontal rack 2100. Such horizontal racks 2100 can support the load of the battery modules 1000.

[0176] Thus, the energy storage system 2000 according to one embodiment of the present invention provides racks 2100, 2200 with a shelf structure capable of supporting the lower part of the battery module 1000. Through this, the energy storage system 2000 provides a solution that can support the load of the battery module 1000 with improved cooling efficiency.

[0177] The present invention has been described with reference to embodiments shown in the drawings, which are illustrative only, and any person with ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

[0178] Therefore, the scope of technical protection of the present invention should be defined by the claims. [Explanation of Symbols]

[0179] 100 Secondary battery 200 Battery Stack 300 Housing 1000 Battery Modules

Claims

1. Multiple rechargeable batteries; and, A housing for housing the aforementioned multiple secondary batteries; The aforementioned housing is A first cooling plate supporting the lower part of the plurality of secondary batteries; and, A battery module comprising: one or more second cooling plates formed in connection with the first cooling plate and surrounding at least a portion of the sides of the plurality of secondary batteries;

2. The battery module according to claim 1, wherein at least one of the first cooling plate and the second cooling plate includes a cooling channel through which a refrigerant for cooling the battery module circulates.

3. The battery module according to claim 1, wherein at least one of the first cooling plate and the second cooling plate has one or more cooling holes formed therein for cooling the battery module.

4. The battery module according to claim 1, wherein the second cooling plate includes a first side plate and a second side plate positioned opposite to the first side plate.

5. The battery module according to claim 4, further comprising an end plate including a first end plate connecting one side of the first side plate and one side of the second side plate; and a second end plate connecting the other side of the first side plate and the other side of the second side plate.

6. The battery module according to claim 4, wherein the second cooling plate includes a third side plate connecting one side of the first side plate and one side of the second side plate; and a fourth side plate connecting the other side of the first side plate and the other side of the second side plate.

7. The battery module includes two or more battery stacks formed by arranging the plurality of secondary batteries in a first direction, The battery module according to claim 1, wherein the two or more battery stacks are arranged in a second direction at predetermined intervals from each other.

8. The battery module according to claim 7, further comprising: a first cooling plate provided at a predetermined interval; and a first reinforcing member.

9. The battery module according to claim 7, wherein the first cooling plate is formed with a thickness greater in the region corresponding to the predetermined interval than in the region corresponding to the battery stack.

10. The battery module according to claim 1, further comprising: a second reinforcing member provided in a region of the first cooling plate connected to the second cooling plate;

11. The battery module according to claim 1, wherein the first cooling plate is formed with a thickness greater in the region connected to the second cooling plate than in the region corresponding to the plurality of secondary batteries.

12. The battery module according to claim 1, further comprising a reinforcing plate supporting the lower part of the first cooling plate;

13. Multiple battery modules; and, A rack for housing the plurality of battery modules; The aforementioned battery module is Multiple rechargeable batteries; and, A housing for housing the aforementioned multiple secondary batteries; The aforementioned housing is A first cooling plate supporting the lower part of the plurality of secondary batteries; and, An energy storage system comprising: one or more second cooling plates formed in connection with the first cooling plate and surrounding at least a portion of the sides of the plurality of secondary batteries;

14. The energy storage system according to claim 13, wherein at least one of the first cooling plate and the second cooling plate includes a cooling channel through which a refrigerant for cooling the battery module circulates.

15. The second cooling plate includes a first side plate and a second side plate positioned opposite to the first side plate. The energy storage system according to claim 13, further comprising an end plate including a first end plate connecting one side of the first side plate and one side of the second side plate; and a second end plate connecting the other side of the first side plate and the other side of the second side plate.

16. The battery module includes two or more battery stacks, each formed by arranging the plurality of secondary batteries in a first direction and arranging them in a second direction at predetermined intervals from each other. The energy storage system according to claim 13, further comprising: a first cooling plate provided at a predetermined interval; and a first reinforcing member.

17. The battery module includes two or more battery stacks, each formed by arranging the plurality of secondary batteries in a first direction and arranging them in a second direction at predetermined intervals from each other. The energy storage system according to claim 13, wherein the first cooling plate is formed with a thickness greater in the region corresponding to the predetermined interval than in the region corresponding to the battery stack.

18. The energy storage system according to claim 13, further comprising: a second reinforcing member provided in a region of the first cooling plate connected to the second cooling plate;

19. The energy storage system according to claim 13, wherein the first cooling plate is formed with a thickness greater in the region connected to the second cooling plate than in the region corresponding to the plurality of secondary batteries.

20. The energy storage system according to claim 13, further comprising: a reinforcing plate supporting the lower part of the first cooling plate; the battery module;

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