Battery assembly

Abstract

The invention relates to a battery assembly comprising a battery housing having a bottom surface on which a cooling channel is provided. The plurality of fastening grooves are formed by recessing the bottom surface at a plurality of points on the bottom surface. The battery assembly also includes a battery module. The lower surface of the battery module is disposed on the bottom surface of the battery case. The plurality of coupling units are disposed at an edge of the lower surface at a plurality of points on the lower surface. The coupling unit is positioned to protrude toward the bottom surface in a manner corresponding to the plurality of fastening grooves. When the battery module is disposed on the battery case, respective ones of the coupling units are inserted into respective ones of the fastening grooves so as to be fastened to the fastening grooves and maintain the lower surface in contact with the cooling channels on the bottom surface.

Description

Technical Field

[0001] The present disclosure relates to a battery module and more particularly to a battery case and a battery module seated in the battery case. Background Art

[0002] Batteries have been widely used in mobile devices, auxiliary power equipment, etc. In addition, batteries have attracted attention as a main power source for electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, etc. In the prior art, these vehicles have been proposed as an alternative to solve various problems caused by gasoline vehicles or diesel engine vehicles, such as air pollution.

[0003] Since a large amount of electricity is required to drive an electric vehicle, dozens of battery cells or up to thousands of battery cells are generally required. The configuration of an electric vehicle battery may vary depending on the type of electric vehicle. However, generally, an electric vehicle battery is configured with battery cells, battery modules, and battery packs.

[0004] Generally, when a battery module placed in a battery case forms a battery pack, there are two methods of coupling the battery module to the battery case. The first method is to make flanges to which a fastening mechanism is coupled protrude from the front and rear of the battery module respectively and couple the fastening mechanism to the flanges after the battery module is placed. The second method is to form a placement surface to which a fastening mechanism is coupled on each edge portion of the battery module. However, both methods have disadvantages.

[0005] Specifically, since a separate component is required in the battery housing so as to fix the fastening surface corresponding to the protruding flange to the battery module, the first method has the disadvantage of reducing the space for the battery housing. As the space of the battery housing is reduced, the space for the battery module placed in the battery housing is also reduced. Therefore, the size or number of battery cells installed in the battery module is reduced. Therefore, the first method has the disadvantage of reducing energy density.

[0006] In the second method, the fastening surface is fixed to each edge of the battery module. Therefore, each edge is bent to fix the fastening placement area of ​​the fastening unit in the battery module. Therefore, the excess sealing material of the packaged battery cell installed in the battery module must be bent. Since the platform portion of the battery cell (i.e., the excess sealing material of the packaged battery cell) is bent, the exhaust for injecting the internal gas may not occur smoothly. Therefore, the problem of reduced stability of the battery arises. Summary of the invention

[0007] According to an embodiment of the present disclosure, a battery assembly is provided. More particularly, an embodiment of the present disclosure provides a coupling structure of a battery housing and a battery module disposed in the battery housing. In the prior art, the battery housing and the battery module are coupled to each other using a bolt fastening technique. However, the bolt fastening technique has the disadvantage of reducing the stability of the battery and the energy density of the battery pack.

[0008] Therefore, an object of the present disclosure is to provide a battery assembly from which not only the component structure required to couple the battery housing and the interior of the battery pack to each other is eliminated, but also the fastening mounting surface fixed to the edge of the battery module is eliminated. The battery assembly can improve the stability of the battery and the energy density of the battery pack.

[0009] The technical objectives of the present disclosure are not limited to the above technical objectives. A person skilled in the art should easily understand other technical objectives not mentioned from the following description.

[0010] According to aspects of the present disclosure, a battery assembly is provided. The battery assembly includes a battery housing having a bottom surface, and a cooling channel is provided on the bottom surface. A plurality of fastening grooves are formed by recessing the bottom surface at a plurality of points on the bottom surface. The battery module also includes a battery module. The lower surface of the battery module is disposed on the bottom surface of the battery housing. A plurality of coupling units are disposed at the edge of the lower surface of the battery module at a plurality of points on the lower surface of the battery module. The coupling units of the plurality of coupling units are positioned to protrude toward the bottom surface of the battery housing in a manner corresponding to the plurality of fastening grooves. When the battery module is disposed on the battery housing, the corresponding coupling units of the coupling units are inserted into the corresponding fastening grooves of the fastening grooves to hook and fix to the fastening grooves and keep the lower surface of the battery module in close contact with the cooling channel on the bottom surface.

[0011] In an embodiment, the cooling channel may be formed by extrusion molding in a vertical direction. A flow path may be formed as a straight line in the cooling channel along the vertical direction, and the cooling medium flows along the flow path.

[0012] In an embodiment, a plurality of flow paths may be formed in the cooling channel. The fastening grooves of the plurality of fastening grooves may be formed in a manner to avoid overlapping with the cooling channel.

[0013] In an embodiment, a plurality of flow paths may be formed in the cooling channel. At least some of the plurality of flow paths are spaced apart from each other. The fastening groove may be formed at a point where the flow paths are spaced apart from each other.

[0014] In an embodiment, the coupling unit may be welded or chemically bonded to clamps provided at both sides of the battery module. The clamps may be pressed against the battery module.

[0015] In an embodiment, the upper end of the coupling unit among the plurality of coupling units may be extended in a horizontal direction to form a coupling installation surface. When the coupling installation surface is in contact with the fixture surface, the coupling unit may be welded or chemically bonded to the fixture.

[0016] In an embodiment, the injection hole may be formed in the battery case in such a manner as to penetrate the bottom surface of the battery case. After the battery module is seated, the gap filler may be applied through the injection hole.

[0017] In an embodiment, the fastening groove may be a hole in the battery case such that the hole passes through the bottom surface of the battery case.

[0018] In the battery assembly, the coupling unit may be formed in a manner that a length in a height direction of the coupling unit is greater than a depth of the fastening groove. When the coupling unit is inserted into the fastening groove, a lower end portion of the coupling unit may be exposed below a bottom surface of the battery housing.

[0019] In an embodiment, the first fixing portion may be formed at the lower end of the coupling unit in a manner protruding in the vertical direction. The fastening groove may be formed in a manner that the length of the fastening groove in the vertical direction is equal to or greater than the length of the lower end of the coupling unit in the vertical direction. When inserted into the fastening groove, the coupling unit may slide in a manner that prevents a gap from occurring between the upper end of the coupling unit and the fastening groove. The lower end of the coupling unit may be extended laterally in a manner that comes into surface contact with the battery housing.

[0020] In an embodiment, the lower end of the coupling unit may be extended laterally so as to come into surface contact with the battery housing. A fixing material may be applied near the surface contact portion to fix the coupling unit.

[0021] In an embodiment, the first binding unit and the second binding unit may be formed in a manner corresponding to each other in a state where the lower end of the coupling unit is extended laterally in a manner of contacting the battery housing surface. The first binding unit and the second binding unit may be respectively disposed at the lower end of the coupling unit and the battery housing.

[0022] In an embodiment, the second fixing portion may be formed at an end of the first fixing portion in a manner of protruding in the height direction. A coupling groove may be formed in the battery housing, and the second fixing portion is coupled to the coupling groove, so that when the coupling unit is inserted into the fastening groove, the second fixing portion can be coupled to the coupling groove.

[0023] In an embodiment, the coupling unit may be formed in such a manner that the lower end of the coupling unit extends in the horizontal direction. One side portion of the fastening groove may be formed to have a greater width in the horizontal direction than the lower end of the coupling unit in such a manner that the laterally extending lower end of the coupling unit passes through the fastening groove. The coupling unit may be inserted into the fastening groove via one side portion of the fastening groove and may slide to the other side portion to be fixed, the other side portion having a smaller width in the horizontal direction than the one side portion.

[0024] In an embodiment, a blocking portion may be formed at the other side of the fastening groove in a manner of protruding in a vertical direction, and the coupling unit may slide to the other side of the fastening groove. The coupling unit may be fixed to the fastening groove by the blocking portion.

[0025] In an embodiment, corresponding pack side members may be provided at both sides of the battery housing. The battery modules may be coupled in such a manner that the lower edges of the battery modules are directly inserted into the corners formed by the pack side members and the cooling channels.

[0026] According to an embodiment of the present disclosure, the battery housing and the battery module are coupled to each other by adopting a novel fastening technology instead of the fastening technology used in the prior art. Therefore, when compared with the battery assembly in the prior art, the stability and energy density of the battery can be improved.

[0027] In addition, the component structure required for coupling the battery housing and the battery module in the prior art can be eliminated, thereby reducing the weight of the battery assembly. In addition, the space on the width of the battery housing (otherwise occupied by the component) can be used to load the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0029] Figure 1 is a diagram showing a battery assembly according to an embodiment of the present disclosure;

[0030] Figure 2 The present invention is shown in the embodiment of the present invention. Figure 1 Figure 1 shows a battery module in FIG.

[0031] Figure 3 The present invention is shown in the embodiment of the present invention. Figure 1 Figure 2 shows a battery housing in FIG.

[0032] Figure 4 is a diagram showing a state in which a coupling unit according to a first embodiment of the present disclosure is inserted into a fastening groove;

[0033] Figure 5The present invention is shown in the embodiment of the present invention. Figure 4 A diagram showing a state in which the coupling unit is fixed to the battery housing;

[0034] Figure 6 is a diagram showing a state where the second embodiment of the present disclosure is inserted into a fastening groove;

[0035] Figure 7 The present invention is shown in the embodiment of the present invention. Figure 6 A diagram showing a state in which the coupling unit is fixed to the battery housing;

[0036] Figure 8 is a diagram showing a state in which a coupling unit according to a third embodiment of the present disclosure is fixed to a battery case;

[0037] Fig. 9 is a diagram showing a state in which a coupling unit according to a fourth embodiment of the present disclosure is fixed to a battery case; and

[0038] Fig.10 According to the embodiment of the present disclosure Figure 1 A cross-sectional view taken along line XX. DETAILED DESCRIPTION

[0039] Figure 1 is a diagram illustrating a battery assembly according to an embodiment of the present disclosure. Figure 2 It is shown Figure 1 Figure 1. A diagram of the battery module in FIG. Figure 3 It is shown Figure 1 Figure 2 shows a battery case in FIG. Figure 4 2 is a diagram illustrating a state in which a coupling unit according to a first embodiment of the present disclosure is inserted into a fastening groove. Figure 5 It is shown Figure 4 FIG. 4 is a diagram showing a state in which the coupling unit is fixed to the battery housing. Figure 6 It is a diagram showing a state where the second embodiment of the present disclosure is inserted into a fastening groove. Figure 7 It is shown Figure 6 FIG. 4 is a diagram showing a state in which the coupling unit is fixed to the battery housing. Figure 8 is a diagram illustrating a state in which a coupling unit according to a third embodiment of the present disclosure is fixed to a battery case. Fig. 9 2 is a diagram illustrating a state in which a coupling unit according to a fourth embodiment of the present disclosure is fixed to a battery case.

[0040] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The same or similar constituent elements are attached with the same reference numerals, and description thereof will not be repeated.

[0041] When describing the embodiments of the present disclosure, in the case where it is determined that the detailed description of well-known features or functions may obscure the nature and key points of the present disclosure, the detailed description thereof is omitted. In addition, the drawings are only used to enhance the understanding of the embodiments disclosed in this specification. It should be understood that the technical ideas disclosed in this specification are not limited by the drawings. In addition, it should be understood that any changes, any equivalents and any substitutions of the constituent elements according to the present disclosure that fall within the scope of the technical ideas of the present disclosure are included in the scope of the present disclosure.

[0042] The terms "first", "second", etc. are used to describe various constituent elements having the same function. These terms do not impose any restrictions on the meanings of these constituent elements. These terms are only used to distinguish constituent elements having the same function.

[0043] A noun in the singular has the same meaning as when used in its plural form unless the context dictates a different meaning.

[0044] The terms "include", "have", "comprises", etc. in the present disclosure are intended to indicate that the features, numbers, steps, operations, constituent elements, parts, or combinations thereof are included. Such terms should be understood as not excluding the possibility of the existence or addition of one or more other features, numbers, steps, operations, constituent elements, parts, or combinations thereof.

[0045] Reference Figures 1 to 3 , a battery assembly according to an embodiment of the present disclosure may include a battery housing 300 and a battery module 100. The battery housing 300 has a bottom surface, and a cooling channel 350 is provided on the bottom surface. A plurality of fastening grooves 330 are formed by respectively recessing the bottom surface at a plurality of points on the bottom surface. The lower surface of the battery module 100 is disposed on the bottom surface of the battery housing 300. A plurality of coupling units 200 are respectively disposed at the edge of the lower surface of the battery module 100 at a plurality of points on the lower surface of the battery module 100. The coupling unit 200 is positioned to protrude toward the bottom surface of the battery housing 300 in a manner corresponding to the plurality of fastening grooves 330, respectively. When the battery module 100 is disposed on the battery housing 300, the coupling unit 200 is inserted into the fastening groove 330, thereby hooking and fixing to the fastening groove 330 and keeping the lower surface of the battery module 100 in close contact with the cooling channel 350 on the bottom surface.

[0046] In the prior art, there are generally two methods for fixing a battery module to a battery housing when the battery module is placed in the battery housing to form a battery pack.

[0047] In the first method, flanges are protrudingly formed at the front and rear of the battery module, respectively, and a mounting member is separately formed on the battery housing to fix the fastening surface corresponding to the flange. In the first method, the flange on the battery module is placed on the mounting member on the battery housing, and then the fastening mechanism is fastened to the flange and the mounting member. Therefore, the battery module is fixed to the battery housing. In the second method, a fastening unit is formed by fixing a fastening surface to each edge portion of the battery module, and the fastening mechanism is fastened to the fastening unit and the bottom surface of the battery housing. However, both the first method and the second method have advantages.

[0048] Specifically, in the first method, a mounting member is separately required in the battery housing to fix the fastening mounting surface corresponding to the flange protruding on the battery module. This requirement reduces the space in the battery housing. The space in the battery housing is reduced, thereby reducing the space for the battery module to be placed in the battery housing. Therefore, the number and size of battery cells installed in the battery module are limited. Therefore, the first method has the disadvantage of reducing the energy density of the battery.

[0049] In the second method, the coupling unit is formed by fixing the fastening mounting surface on each edge of the battery module. Therefore, the platform portion of the battery cell installed in the battery module (i.e., the excess sealing material of the packaged battery cell) must be extended laterally. Therefore, when the gas is discharged from the battery cell, the gas in the battery cell may not be discharged smoothly due to the lateral extension of the platform portion of the battery cell. Therefore, the problem of reduced stability of the battery may occur.

[0050] According to the embodiments of the present disclosure, the separately required mounting member in the battery housing in the prior art is eliminated, and the platform portion of the battery unit is not extended laterally. Therefore, the space in the battery housing is efficiently utilized, and the stability of the battery is also achieved.

[0051] First, refer to Figure 3 , describes a battery case 300 according to an embodiment. The battery case 300 has a bottom surface, and a cooling channel 350 is provided on the bottom surface. A plurality of fastening grooves 330 are formed by recessing the bottom surface at a plurality of points on the bottom surface. Therefore, the cooling channel 350 is formed by extrusion molding in a vertical direction. A flow path is formed as a straight line in the cooling channel 350 in a vertical direction, and a cooling medium flows along the flow path.

[0052] First, the cooling channel 350 provided on the bottom surface of the battery housing 300 according to the embodiment is described. The cooling channel 350 is formed by extrusion molding in the vertical direction. The extrusion molding of the cooling channel 350 in the vertical direction enables the cooling channel 350 to not only perform a battery cooling function, but also serve as a support for enhancing the rigidity of the battery housing 300 in the vertical direction.

[0053] Therefore, the multiple vertical cross members 360 required in the battery housing 300 as required in the prior art are reduced to a minimum. Although the vertical cross member 360 is not provided, the effect of enhancing the rigidity of the battery housing 300 in the vertical direction can be achieved. The number of vertical cross members provided in the battery housing 300 is minimized. The space in the battery housing 300 can be used more efficiently. More battery modules 100 can be installed in the battery housing 300 than in the prior art. The effect of improving energy density can also be achieved.

[0054] In this way, the cooling channel 350 as a whole serves as a support for enhancing the rigidity of the battery housing 300 in the vertical direction. Therefore, when necessary, according to an embodiment of the present disclosure, the vertical cross member 360 can be provided on the battery housing 300 in an assembled manner. In other words, after the plurality of vertical cross members 360 are formed, the battery module 100 is not placed. Alternatively, in the case where it is determined that the rigidity of the battery housing 300 needs to be enhanced after the battery module 100 is placed in the battery housing 300, the vertical cross member 360 can be provided in an attached manner.

[0055] The flow path may be formed as a straight line within the cooling channel 350, along which the flow medium flows. Since the flow path is simply formed as a straight line, the cooling medium circulates quickly. Therefore, the battery module 100 disposed in the battery housing 300 can be effectively cooled. Even when the fastening groove 330 described below needs to be formed on the bottom surface of the battery housing 300, the fastening groove 330 can be formed on the bottom surface of the battery housing 300 in a manner that easily avoids overlapping with the flow path. Therefore, the advantage of easily performing the process of forming the fastening groove 330 can be achieved.

[0056] Next, a plurality of fastening grooves 330 formed by respectively recessing the bottom surface of the battery case 300 at a plurality of points on the bottom surface of the battery case 300 according to an embodiment are described. The coupling unit 200 on the battery module 100 described below is inserted into the fastening groove 330 and used to fix the battery module 100.

[0057] Unlike in the prior art, the fastening groove 330 is formed on the bottom surface of the battery housing 300, and the coupling unit 200 and the fastening groove 330 on the battery module 100 described below are engaged with each other, thereby providing various advantages. For example, the mounting member that is separately and necessary for fixing the fastening placement surface in the prior art is no longer necessary in the battery housing 300. Therefore, the mounting member formed in the battery housing 300 is eliminated, thereby achieving the effect of reducing the weight of the battery. In addition, there is no need to form a mounting member separately in the battery housing 300. Therefore, it is possible to use space that is no longer occupied by the mounting member. Therefore, the effect of improving energy density is achieved.

[0058] In an embodiment, the fastening groove 330 is formed in a manner to avoid overlapping with the cooling channel 350. For example, a plurality of flow paths are formed in the cooling channel 350, some of which are spaced apart from each other. The fastening groove 330 may be formed at a point where the cooling channels 350 are spaced apart from each other.

[0059] When the fastening groove 330 is formed in a manner that does not avoid overlapping with the cooling channel 350, the cooling medium flows to the outside via the fastening groove 330. Therefore, the safety of the battery may be compromised. To this end, the fastening groove 330 should be formed in a manner that avoids overlapping with the cooling channel 350. In addition, the fastening groove 330 may be formed in the shape of a hole in the battery housing 300 in a manner that passes through the bottom surface of the battery housing 300. Using the fastening groove 330 formed in the battery housing 300 in a manner that passes through the bottom surface of the battery housing 300, the coupling unit 200 described below can be used to fix the battery module 100 in various ways.

[0060] In addition, the injection hole can be formed in the battery housing 300 in a manner that passes through the bottom surface of the battery housing 300, so that the gap filler is applied through the injection hole after the battery module 100 is placed. After being placed in the battery housing 300, the battery module 100 can slide into place and be fixed in place. When the battery module 100 slides, the gap filler may be pushed together. Therefore, in an embodiment, in order to avoid this phenomenon of the gap filler being pushed, the insertion hole is formed in the battery housing 300 in a manner that passes through the bottom surface of the battery housing 300. Therefore, after the battery module 100 is placed on the bottom surface of the battery housing 300, the gap filler can be injected through the injection hole from the other side of the bottom surface.

[0061] Now refer to Figure 2 The battery module 100 according to the embodiment is described. The battery module 100 is placed on the bottom surface of the battery housing 300. A plurality of coupling units 200 are respectively provided at the edge of the lower surface of the battery module 100 at a plurality of points on the lower surface of the battery module 100. The coupling units 200 are positioned to protrude toward the bottom surface of the battery housing 300 in a manner corresponding to the plurality of fastening grooves 330, respectively.

[0062] The coupling unit 200 that can be used to fix the battery module 100 according to the embodiment is now described in more detail. The coupling unit 200 can be set by welding or chemically bonding to the clamp 250, and the clamp 250 is set on both sides of the battery module 100. The clamp 250 presses against the battery module 100. The clamp 250 provided on the end plate on each side of the battery module 100 is not only used to apply surface pressure to the battery cell installed in the battery module 100 by pressing against the battery module 100, but also used to fix the battery cell. To this end, the clamp 250 strongly presses against both sides of the battery module 100. Therefore, the clamp 250 is not easy to separate from the battery module 100 by external force. The coupling unit 200 is coupled to the clamp 250. The position of the coupling unit 200 is not easy to change by external force. Therefore, the coupling unit 200 can be strongly fixed.

[0063] The upper end of the coupling unit 200 is extended in the horizontal direction to form a coupling placement surface. In a state where the coupling placement surface is in surface contact with the clamp 250, the coupling unit 200 may be welded or chemically bonded to the clamp 250. In the case where the coupling unit 200 is coupled to the clamp 250 using a fastening mechanism such as a bolt, the battery cells disposed in the battery module 100 may be damaged. In order to prevent such damage, in an embodiment, the coupling unit 200 is welded or chemically bonded to the clamp 250. As used herein, chemical bonding refers to a process of bonding using a chemical bonding agent such as an adhesive or a bonding agent.

[0064] In an embodiment, the coupling unit 200 is welded or chemically bonded to a clamp 250 pressed against the battery module 100 instead of being directly welded or chemically bonded to the housing of the battery module 100. It is possible to prevent the battery cells mounted in the battery module 100 from being damaged due to heat generated during the non-mechanical coupling process or due to other chemical reactions.

[0065] In the case where the fastening groove 330 passes through the bottom surface, the coupling unit 200 is formed in such a manner that the length in the height direction of the coupling unit 200 is greater than the depth of the fastening groove 330. Therefore, in a state where the coupling unit 200 is inserted into the fastening groove 330, the lower end portion of the coupling unit 200 can be exposed below the bottom surface of the battery housing 300. The coupling unit 200 is formed in such a manner that the length in the height direction of the coupling unit 200 is greater than the depth of the fastening groove 330. The fixing force of the coupling unit 200 can be improved in many ways, such as extending the exposed lower end portion of the coupling unit 200 laterally after the coupling unit 200 passes through the fastening groove 330.

[0066] In addition, the battery module 100 is placed on the battery housing 300 via the coupling unit 200. Therefore, it is no longer necessary to fix the fastening and placement surface to each edge of the battery module 100 in the prior art. Therefore, fixing the fastening and placement surface to each edge of the battery module 100 makes it unnecessary to extend the platform portion of the battery cell (i.e., the excess sealing material of the packaged battery cell) that inevitably appears laterally. Since the platform portion of the battery cell is no longer extended laterally, the gas in the battery cell can be discharged smoothly. Therefore, the advantage of improving the stability of the battery cell can be achieved.

[0067] The battery module 100 may be formed in such a manner that a module bus bar output terminal 101 of the battery module 100 protrudes only from one end of the battery module 100. Figure 2 As shown, the module busbar output terminal 101 protruding only from the left end of the battery module 100 can electrically connect the inside of the battery module 100 to the outside. The module busbar output terminal 101 is not provided at the right end of the battery module 100 or at any end other than the left end thereof.

[0068] Next, various embodiments of the present disclosure are described. However, it should be apparent that the present disclosure is not limited to these embodiments. In the first to fourth embodiments described below, the fastening groove 330 is formed in the shape of a hole in a shared manner through the bottom surface. The coupling unit 200 has a length in the height direction greater than the depth of the fastening groove 330. Therefore, in a state where the coupling unit 200 is inserted into the fastening groove 330, the lower end of the coupling unit 200 is exposed.

[0069] First, refer to Figure 4 and Figure 5 A first embodiment is described. The first fixing portion 210 is formed at the lower end portion of the coupling unit 200 in a manner protruding in the vertical direction. The fastening groove 330 is formed in a manner that the length of the fastening groove 330 in the vertical direction is equal to or greater than the length of the lower end portion of the coupling unit 200 in the vertical direction. In a state of being inserted into the fastening groove 330, the coupling unit 200 slides in a manner that prevents a gap from occurring between the upper end of the coupling unit 200 and the fastening groove 330. Then, the lower end portion of the coupling unit 200 is extended laterally in a manner that comes into surface contact with the battery housing 300. The first fixing portion 210 is used to enhance the fixing force. For details, refer to Figure 5, the first fixing portion 210 is positioned outward from the fastening groove 330 while the coupling unit 200 is extended laterally in a manner that is in surface contact with the battery housing 300. When the battery module 100 is shaken in the upward-downward direction by an external force, the first fixing portion 210 can be hooked on the fastening groove 330, thereby preventing the battery module 100 from being separated. In addition, in order to enhance the fixing force, the lower end portion of the coupling unit 200 is extended laterally in a manner that is in surface contact with the battery housing 300. Then, a fixing material can be applied to the vicinity of the surface contact portion to fix the coupling unit 200.

[0070] Next, refer to Figure 6 and Figure 7 The second embodiment is described. The first fixing portion 210 is formed at the lower end of the coupling unit 200 in a manner protruding in the vertical direction. The fastening groove 330 is formed in a manner that the length of the fastening groove 330 in the vertical direction is equal to or greater than the length of the lower end of the coupling unit 200 in the vertical direction. In a state where the lower end of the coupling unit 200 is extended laterally in a manner that comes into surface contact with the battery housing 300, the first binding unit 220 and the second binding unit 221 are formed in a manner corresponding to each other. The first binding unit 220 and the second binding unit 221 are respectively provided at the lower end of the coupling unit 200 and the battery housing 300. The fastening mechanism 225 is bound to each of the first binding unit 220 and the second binding unit 221. Therefore, in a state where the coupling unit 200 is bent in a manner that comes into surface contact with the battery housing 300, the first binding unit 220 and the second binding unit 221 correspond to each other. Therefore, the fastening mechanism 225 can be bound to the first binding unit 220 and the second binding unit 221, thereby fixing the battery module 100.

[0071] Now refer to Figure 8A third embodiment is described. The first fixing portion 210 is formed at the lower end of the coupling unit 200 in a manner protruding in the vertical direction. The fastening groove 330 is formed in a manner that the length in the vertical direction of the fastening groove 330 is equal to or greater than the length in the vertical direction of the lower end of the coupling unit 200. The second fixing portion 211 is formed at the end of the first fixing portion 210 in a manner protruding in the height direction. The coupling groove 310 is formed in the battery housing 300, and the second fixing portion 211 is coupled to the coupling groove 310. Therefore, in a state where the coupling unit 200 is inserted into the fastening groove 330, the second fixing portion 211 is coupled to the coupling groove 310. The coupling unit 200 is inserted into the fastening groove 330 and then slides in a manner that prevents a gap from occurring between the upper end of the coupling unit 200 and the fastening groove 330. In this state, the first fixing portion 210 protrudes out of the fastening groove 330, thereby blocking the battery module 100 from being separated in the upward-downward direction. The second fixing portion 211 coupled to the coupling groove 310 serves to prevent the battery module 100 from being separated or shaken in the left-forward direction. Therefore, both the first fixing portion 210 and the second fixing portion 211 serve to enhance the fixing force.

[0072] Now refer to Fig. 9 A fourth embodiment is described. The coupling unit 200 is formed in such a manner that the lower end of the coupling unit 200 extends in the horizontal direction. One side of the fastening groove 330 is formed in such a manner that the lower end of the coupling unit 200 extending laterally passes through the fastening groove 330 to have a greater width in the horizontal direction than the lower end of the coupling unit 200. The coupling unit 200 is inserted into the fastening groove 330 via one side of the fastening groove 330 and slides to the other side, which has a smaller width in the horizontal direction than the one side. Therefore, the coupling unit 200 is fixed to the fastening groove 330. The coupling unit 200 is formed in such a manner that the lower end of the coupling unit 200 extends in the horizontal direction, and the coupling unit 200 is inserted into the fastening groove 330 via one side having a larger width and then slides to the other side having a smaller width. Therefore, in the case where the battery module 100 may be separated in the upward-downward direction, the lower end of the coupling unit 200 is hooked on the other side, thereby blocking the battery module 100 from being separated. The blocking portion 331 is formed at the other side of the fastening groove 330 in a manner of protruding in the vertical direction. The coupling unit 200 slides to the other side of the fastening groove 330. Then, the coupling unit 200 can be fastened to the fastening groove 330. The coupling unit 200 is fixed to the fastening groove 330 by the blocking portion 331. Therefore, it is possible to block the battery module 100 from shaking or separating in the left-right direction.

[0073] Therefore, according to the embodiment of the present disclosure, the battery housing 300 and the battery module 100 are coupled to each other by adopting a novel fastening technology instead of the fastening technology used in the prior art. Therefore, when compared with the battery assembly in the prior art, the stability and energy density of the battery can be improved.

[0074] In addition, in the battery assembly according to the present disclosure, the component structure required to couple the battery housing and the battery module in the prior art can be eliminated, thereby reducing the weight of the battery assembly. In addition, the space on the width of the battery housing 300 (otherwise occupied by the component) can be used to load the battery module 100.

[0075] like Fig.10 As shown, the group side members 301 respectively arranged on both sides of the battery housing 300, together with the cooling channel 350, form a corner 302 in the battery housing 300. In the prior art, it is necessary to separately install a member for fixing the battery module 100 at the corner 302. However, according to an embodiment of the present disclosure, this member is eliminated. Therefore, the lower edge of the battery module 100 can be directly inserted into the corner 302 formed by the group side member 301 and the cooling channel 350. This can increase the battery loading space in the battery housing 300 and can contribute to the reduction of the weight of the battery housing 300.

[0076] The present disclosure is not limited to the embodiments of the present disclosure described above with reference to the accompanying drawings. The scope of the present disclosure is defined by the following claims. Therefore, it should be apparent to a person skilled in the art that various modifications and variations may be made to the embodiments of the present disclosure without departing from the scope of the technical concept of the present disclosure.

Claims

1. A battery assembly, in, include: A battery housing having a bottom surface, a cooling channel disposed on the bottom surface, and a plurality of fastening grooves formed by recessing the bottom surface at a plurality of points on the bottom surface; as well as Battery modules, The lower surface of the battery module is placed on the bottom surface of the battery housing. A plurality of coupling units are provided at a plurality of points on the lower surface of the battery module at an edge of the lower surface of the battery module, the coupling units among the plurality of coupling units being positioned to protrude toward the bottom surface of the battery housing in a manner corresponding to the plurality of fastening grooves, and When the battery module is placed on the battery housing, corresponding coupling units among the coupling units are inserted into corresponding fastening grooves among the fastening grooves to be hooked and fixed to the fastening grooves and keep the lower surface of the battery module in contact with the cooling channel on the bottom surface.

2. The battery assembly according to claim 1, wherein: The cooling channel is formed by extrusion molding in a vertical direction, a flow path is formed as a straight line in the cooling channel along the vertical direction, and a cooling medium flows along the flow path.

3. The battery assembly according to claim 1, wherein: A plurality of flow paths are formed in the cooling channel, and a fastening groove among the plurality of fastening grooves is formed in such a manner as to avoid overlapping with the cooling channel.

4. The battery assembly according to claim 1, wherein: A plurality of flow paths are formed in the cooling passage, at least some of the plurality of flow paths are spaced apart from each other, and fastening grooves of the plurality of fastening grooves are formed at points where the flow paths are spaced apart from each other.

5. The battery assembly according to claim 1, wherein: The coupling units among the plurality of coupling units are welded or chemically bonded to clamps disposed at both sides of the battery module, and the clamps are pressed against the battery module.

6. The battery assembly according to claim 1, wherein: The upper end portions of the coupling units in the plurality of coupling units are extended in a horizontal direction to form a coupling placement surface, and The coupling unit is welded or chemically bonded to the jig in a state where the coupling mounting surface is in contact with the jig surface.

7. The battery assembly according to claim 1, wherein: An injection hole is formed in the battery case in such a manner as to penetrate the bottom surface of the battery case, and a gap filler is applied through the injection hole after the battery module is seated.

8. The battery assembly according to claim 1, wherein: A fastening groove of the plurality of fastening grooves is a hole in the battery case that passes through the bottom surface of the battery case.

9. The battery assembly according to claim 8, wherein: A coupling unit among the plurality of coupling units is formed in such a manner that a length in a height direction of the coupling unit is greater than a depth of the fastening groove, and when the coupling unit is inserted into the fastening groove, a lower end portion of the coupling unit is exposed below the bottom surface of the battery case.

10. The battery assembly according to claim 9, wherein: A first fixing portion is formed at the lower end portion of the coupling unit in a manner of protruding in a vertical direction, The fastening groove is formed in such a manner that a length of the fastening groove in the vertical direction is equal to or greater than a length of the lower end portion of the coupling unit in the vertical direction, and When inserted into the fastening groove, the coupling unit slides to prevent a gap from occurring between the upper end of the coupling unit and the fastening groove, and the lower end of the coupling unit extends laterally to come into surface contact with the battery case.

11. The battery assembly according to claim 10, wherein: The lower end portion of the coupling unit is extended laterally so as to come into surface contact with the battery housing, and A fixing material is applied in the vicinity of the surface contact portion to fix the coupling unit.

12. The battery assembly according to claim 10, wherein: When the lower end portion of the coupling unit is extended laterally in a manner that comes into contact with the surface of the battery shell, the first binding unit and the second binding unit are formed in a manner corresponding to each other, and the first binding unit and the second binding unit are respectively arranged at the lower end portion of the coupling unit and the battery shell.

13. The battery assembly according to claim 10, wherein: The second fixing portion is formed at an end of the first fixing portion so as to protrude in the height direction. A coupling groove is formed in the battery housing, the second fixing portion is coupled to the coupling groove, and In a state where the coupling unit is inserted into the fastening groove, the second fixing portion is coupled to the coupling groove.

14. The battery assembly according to claim 9, wherein: The coupling unit is formed in such a manner that a lower end portion of the coupling unit extends in a horizontal direction, One side portion of the fastening groove is formed to have a greater width in the horizontal direction than the lower end portion of the coupling unit in such a manner that the laterally extending lower end portion of the coupling unit passes through the fastening groove, and The coupling unit is inserted into the fastening groove via the one side portion of the fastening groove and slides to the other side portion, the other side portion having a smaller width in the horizontal direction than the one side portion, to be fixed.

15. The battery assembly according to claim 14, wherein: The blocking portion is formed on the other side of the fastening groove in a manner of protruding in the vertical direction. The coupling unit slides to the other side of the fastening groove, and The coupling unit is fixed to the fastening groove through the blocking portion.

16. The battery assembly according to claim 1, wherein: Corresponding group side members are disposed on both sides of the battery housing, and the battery modules are coupled in a manner that lower edges of the battery modules are directly inserted into corners formed by the group side members and the cooling channel.

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