Battery assembly

Abstract

The battery assembly of the present disclosure comprises: a plurality of battery cells arranged along a predetermined stacking direction; the battery cell cover covers a tab part protruding from one side of at least one battery cell in the plurality of battery cells; the accommodating shell is used for accommodating the plurality of battery cells; and a side member extending from the accommodating case toward the plurality of cells, at least a portion of the cell cover being located at an upper portion of the side member and supported by the side member.

Description

Technical Field

[0001] The present disclosure relates to a battery assembly, and more particularly to a battery assembly with improved stability and performance. Background Art

[0002] Secondary batteries convert electrical energy into chemical energy and store it, allowing for repeated use through charging and discharging. Due to their economical and environmentally friendly properties, they are widely used in various industries. Among secondary batteries, lithium secondary batteries (Lithium Secondary Batteries) are particularly widely used in various industries, including portable devices that require high energy density.

[0003] To improve capacity and performance, more than one secondary battery cell can be combined to form a battery module or battery pack. In this context, research is actively underway on combining structures that minimize the structure used to secure the combined secondary batteries, thereby increasing energy density while also improving stability. Summary of the Invention

[0004] (1) Technical issues to be solved

[0005] The technical problem to be solved by the present disclosure is to increase the volume ratio within a battery assembly to improve the energy density and performance of the battery assembly.

[0006] In addition, the present disclosure can stably fix the battery cell in the housing, thereby improving the stability of the battery assembly.

[0007] In addition, the present disclosure can be widely applied to electric vehicles, battery charging stations, and other green technology fields such as solar power generation and wind power generation using batteries.

[0008] In addition, the present disclosure can be applied to eco-friendly electric vehicles, hybrid vehicles, and the like that prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0009] (2) Technical solution

[0010] The battery assembly disclosed herein may include: a plurality of battery cells arranged along a predetermined stacking direction; a battery cell cover covering a pole ear portion protruding from one side of at least one of the plurality of battery cells; a accommodating shell accommodating the plurality of battery cells; and a side member extending from the accommodating shell toward the plurality of battery cells, at least a portion of the battery cell cover may be located on an upper portion of the side member and supported by the side member.

[0011] The cell cover may include a coupling portion protruding toward the side member, and the coupling portion may be located on an upper portion of the side member.

[0012] The coupling portion may be formed in plurality at intervals along the predetermined stacking direction.

[0013] The coupling portion may include a through hole formed through the accommodating case in a height direction.

[0014] The cell cover may include: a cover portion covering a side of the at least one cell where the tab portion is provided; and a protection portion extending from one end of the cover portion and located at a lower portion of the at least one cell.

[0015] The side member may include a recessed portion formed by being recessed in a height direction of the accommodation case at a position of the side member corresponding to at least a portion of the cell cover.

[0016] The battery assembly may further include a bus bar assembly electrically connecting the plurality of battery cells, and the bus bar assembly may be located between the battery cell cover and the plurality of battery cells.

[0017] The bus bar assembly may be combined with the cell cover.

[0018] The battery assembly may further include an end plate located outside the plurality of battery cells along the predetermined stacking direction.

[0019] The battery assembly may further include a fastening member connecting the cell cover and the side member.

[0020] The side member may include an insertion hole formed by being recessed or penetrated through one region of the side member in a height direction of the accommodating case.

[0021] The fastening member may pass through the cell cover, and one end of the fastening member may be inserted into the insertion hole.

[0022] The battery assembly may further include: an upper cover connected to the battery cell cover and covering upper surfaces of the plurality of battery cells.

[0023] At least a portion of the upper cover may be located on an upper portion of the side member.

[0024] The battery assembly may further include a fastening member connecting the upper cover, the cell cover, and the side member.

[0025] The fastening member may pass through the upper cover and the cell cover, and at least a portion of the fastening member may be inserted into the side member.

[0026] The housing case may include a housing body including an opening on one side and housing the plurality of battery cells through the opening; and a housing cover coupled to at least one of the housing body and the side member to close the opening.

[0027] One side of the housing cover opposite to the plurality of battery cells may include a pressurizing portion made of an elastic material.

[0028] The battery assembly may further include: a heat insulating member disposed between the plurality of battery cells to face adjacent battery cells.

[0029] The battery assembly may further include a heat conducting portion coated on the receiving case and containing a heat conducting material.

[0030] (3) Beneficial effects

[0031] According to one embodiment of the present disclosure, the volume ration within a battery assembly may be increased to improve the energy density and performance of the battery assembly.

[0032] According to another embodiment of the present disclosure, the battery cell can be stably fixed in the housing, thereby improving the stability of the battery assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is an exploded view illustrating a battery assembly according to one embodiment of the present disclosure.

[0034] Figure 2 is a diagram illustrating a battery cell according to one embodiment of the present disclosure.

[0035] Figure 3 is a diagram illustrating a portion of a battery assembly according to one embodiment of the present disclosure.

[0036] Figure 4 is a diagram illustrating a bus bar assembly according to one embodiment of the present disclosure.

[0037] Figure 5 FIG2 is a diagram illustrating a cell cover and a bus bar assembly according to one embodiment of the present disclosure.

[0038] Figure 6 is a diagram illustrating a sensing portion according to an embodiment of the present disclosure.

[0039] Figure 7 1 is a diagram illustrating a state in which an upper cover, a cell cover, and an end plate are connected to each other according to one embodiment of the present disclosure.

[0040] Figure 8 is a diagram illustrating an accommodation case according to an embodiment of the present disclosure.

[0041] Figure 9 It is enlarged to show Figure 8 Figure 1 of Section S1.

[0042] Figure 10 FIG. 1 is a diagram illustrating a state in which a battery cell is housed in a housing case according to an embodiment of the present disclosure.

[0043] Figure 11 It is enlarged to show Figure 10 Figure 2 shows the S2 region of the α-D-type ...

[0044] Figure 12 is shown along Figure 10 FIG. 2 is a cross-section taken along line AA'.

[0045] Figure 13 is shown along Figure 10 Figure 1 is a cross-section taken along line BB'.

[0046] Figure 14 1 is a diagram showing a state where a battery assembly according to one embodiment of the present disclosure is viewed from above.

[0047] Description of reference numerals:

[0048] 1000: Battery components

[0049] 10: Battery Cell

[0050] 12: Ear

[0051] 130: Battery cover

[0052] 200: Housing

[0053] 210: Side member DETAILED DESCRIPTION

[0054] Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings. However, this is merely exemplary, and the present disclosure is not limited to the specific embodiments described exemplarily.

[0055] Figure 1 FIG. 1 is an exploded view illustrating a battery assembly 1000 according to an embodiment of the present disclosure.

[0056] The battery assembly 1000 of the present disclosure is a general term for a battery module or a battery pack. Therefore, the battery assembly 1000 of the present disclosure can refer not only to a battery module but also to a battery pack that accommodates battery cells 10 without a battery module, such as a cell-to-pack (CTP).

[0057] The battery assembly 1000 includes: a plurality of battery cells 10 arranged along a predetermined stacking direction; and a container 200 for accommodating the plurality of battery cells 10. Figure 1, a plurality of battery cells 10 may be disposed on the accommodating shell 200 .

[0058] Figure 2 is a diagram showing a battery cell 10 according to an embodiment of the present disclosure. Each of the multiple battery cells 10 may include an electrode assembly (not shown), a pole ear portion 12, at least one protrusion 15a, 15b and an outer packaging material 16. The electrode assembly may be accommodated in an internal space formed by the outer packaging material 16. The electrode assembly may include a positive electrode and a negative electrode. The electrode assembly may further include a separator disposed between the positive electrode and the negative electrode. In addition, the electrode assembly may further include an electrolyte to allow ions to flow between the positive electrode and the negative electrode. In an embodiment, the electrode assembly may have a structure in which the positive electrode and the negative electrode are alternately stacked with a separator sandwiched therebetween.

[0059] The tab portion 12 may protrude from one side of the battery cell 10. The tab portion 12 may be formed to protrude from one side of the exterior material 16. The tab portion 12 may electrically connect the electrode assembly to the outside.

[0060] The pole ear portion 12 may include a first pole ear portion 12a and a second pole ear portion 12b. The first pole ear portion 12a and the second pole ear portion 12b may be formed to protrude outward from different side ends of the exterior material 16. For example, referring to Figure 2 The first electrode tab 12a can protrude from the left side of the exterior material 16 in the -X-axis direction, and the second electrode tab 12b can protrude from the right side of the exterior material 16 in the +X-axis direction. However, this is only one embodiment, and the first electrode tab 12a and the second electrode tab 12b can protrude side by side from one side of the exterior material 16.

[0061] The outer packaging material 16 can wrap around and protect the electrode assembly. The outer packaging material 16 can include a sealing portion. The sealing portion can be formed at the outer end of the electrode assembly. The sealing portion can be a portion where one portion of the outer packaging material 16 is joined to another portion. The sealing portion can be formed by various methods, such as bonding, heating, crimping, or welding.

[0062] In an embodiment, the sealing portion may include a first sealing portion 16a, a second sealing portion 16b, and a third sealing portion 16c. The first sealing portion 16a may be formed at one end of the electrode assembly, and the second sealing portion 16b may be formed at the other end of the electrode assembly. The third sealing portion 16c may be formed at a different end of the electrode assembly than the first sealing portion 16a and the second sealing portion 16b.

[0063] The outer packaging material 16 may include a folded portion 14. The folded portion 14 may be a folded portion of the outer packaging material 16. The folded portion 14 may be formed on one side of the outer packaging material 16. The folded portion 14 may be formed on a side of the outer packaging material 16 where the tab portion 12 is not provided.

[0064] In an embodiment, the folded portion 14 may be formed on the lower surface of the exterior material 16. The battery cell 10 may be placed in the container 200 with the folded portion 14 facing the ground. Figure 2 The folded portion 14 may be formed on the surface of the exterior material 16 facing the −Z direction.

[0065] The protrusions 15a and 15b may be formed on the lower surface of the outer material 16. The lower surface may be the surface opposite the upper surface of the housing case 200, which will be described later. The protrusion 15 may protrude a predetermined length beyond the folded portion 14. For example, the protrusion 15 may protrude L1 in the -Z axis direction relative to the folded portion 14.

[0066] On the other hand, the housing 200 is used to protect the plurality of battery cells 10 from external impacts such as vibration. The housing 200 may include a housing body 220, which forms a portion of a housing space 222 for housing the plurality of battery cells 10. Figures 8 to 11 Provide detailed explanation.

[0067] Figure 3 is a diagram illustrating a portion of a battery assembly according to one embodiment of the present disclosure.

[0068] The battery assembly 1000 of the present disclosure includes: a plurality of battery cells 10 arranged along a predetermined stacking direction; and a battery cell cover 130 covering a tab portion 12 protruding from one side of at least one battery cell 10 among the plurality of battery cells 10. Figure 3 , the predetermined stacking direction of the present disclosure may refer to a direction parallel to the Y-axis.

[0069] The cell cover 130 can secure at least a portion of the plurality of battery cells 10 to the container 200. The cell cover 130 can extend along a predetermined stacking direction. Since the tabs 12 protrude from the plurality of battery cells 10 along the predetermined stacking direction, the cell cover 130 can also extend along the predetermined stacking direction to cover the tabs 12.

[0070] The cell cover 130 may be disposed facing the tab portions 12 of the plurality of battery cells 10 in a direction in which the tab portions 12 are disposed, thereby covering the tab portions 12. The cell cover 130 may include a first cell cover 130a located at one end of the plurality of battery cells 10 and a second cell cover 130b located at the other end of the plurality of battery cells 10. That is, the first cell cover 130a and the second cell cover 130b may cover each of the tab portions 12 of the plurality of battery cells 10, and the plurality of battery cells 10 may be disposed between the first cell cover 130a and the second cell cover 130b.

[0071] As described above, the first electrode tab portion 12a and the second electrode tab portion 12b may be located in opposite directions to each other. The first cell cover 130a may be disposed to face the first electrode tab portion 12a, and the second cell cover 130b may be disposed to face the second electrode tab portion 12b.

[0072] For example, refer to Figure 3 The first cell cover 130 a may be disposed to face the first electrode tab portion 12 a in the +X direction of the plurality of battery cells 10 , and the second cell cover 130 b may be disposed to face the second electrode tab portion 12 b in the −X direction.

[0073] At least one first cell cover 130a may be provided. Multiple first cell covers 130a may be arranged along a predetermined stacking direction and connected to one another. Similarly, at least one second cell cover 130b may be provided, and multiple second cell covers 130b may be arranged along a predetermined stacking direction and connected to one another.

[0074] As the number of battery cells 10 increases, it may become difficult to cover the tabs 12 on one side of multiple battery cells 10 with a single cell cover 130. This is because the length of the tabs 12 increases as the number of battery cells 10 increases. As the length of the cell cover 130 increases, the structural stability of the cell cover 130 decreases, potentially reducing manufacturing efficiency during the manufacturing process.

[0075] Therefore, when a plurality of first cell covers 130 a or a plurality of second cell covers 130 b are provided, the plurality of first cell covers 130 a or the plurality of second cell covers 130 b may be connected to each other to cover the tab portions 12 located on one side of the plurality of battery cells 10 .

[0076] On the other hand, the battery assembly 1000 of the present disclosure may include a bus bar 151 for connecting the plurality of battery cells 10 to the outside. In addition, the present disclosure may further include a bus bar frame 155 for supporting the bus bar 151 and the battery cells 10. The bus bar 151 and the bus bar frame 155 may be collectively referred to as a bus bar assembly 150. That is, the bus bar assembly 150 may include the bus bar 151 electrically connected to the plurality of battery cells 10, and may further include a bus bar frame 155 supporting the bus bar 151.

[0077] The bus bar assembly 150 may be electrically connected to the outside to store (or charge) electric energy in the plurality of battery cells 10 or supply (or discharge) electric energy stored in the plurality of battery cells 10 to the outside.

[0078] The bus bar assembly 150 may be located between the cell cover 130 and the plurality of battery cells 10. For example, the bus bar assembly 150 may be located between the first cell cover 130a and the first tab portion 12a, or between the second cell cover 130b and the second tab portion 12b.

[0079] On the other hand, the battery assembly 1000 of the present disclosure may further include a sensing unit 140. The sensing unit 140 may include an electrical device for sensing and controlling the plurality of battery cells 10. For example, the sensing unit 140 may measure the voltage, current, and state of charge of at least a portion of the plurality of battery cells 10, and communicate with the outside to transmit the measurement information. The sensing unit 140 may be formed on one side of the plurality of battery cells 10. For example, the sensing unit 140 may be formed on the upper portion of the plurality of battery cells 10. With respect to the sensing unit 140, reference will be made below. Figure 6 Provide detailed explanation.

[0080] In addition, the battery assembly 1000 of the present disclosure may further include a buffer member 117 or a heat insulating member 160 located between the plurality of battery cells 10 .

[0081] The heat insulating member 160 may be provided between the plurality of battery cells 10 so as to face the adjacent battery cells 10. The heat insulating member 160 may be located between each battery cell 10. The heat insulating member 160 may be located between battery packs formed by combining the plurality of battery cells 10. The same is true for the buffer member 117.

[0082] The buffer member 117 can buffer the pressure caused by the expansion of the battery cell 10 to prevent damage to the battery cell 10. The thermal insulation member 160 can perform a thermal barrier function to prevent flames or heat from spreading to other adjacent battery cells 10 when thermal runaway occurs in any battery cell 10.

[0083] On the other hand, the battery assembly 1000 of the present disclosure may further include end plates 170, which are located at both ends of the plurality of battery cells 10 along the stacking direction. The end plates 170 may be located outside the plurality of battery cells 10 along the predetermined stacking direction. The end plates 170 may be respectively disposed at the outermost sides of the plurality of battery cells 10. The end plates 170 are used to prevent the two side surfaces of the battery assembly 1000 from being exposed to the outside.

[0084] The end plate 170 can be connected to the bus bar assembly 150. One end of the end plate 170 can be connected to the first bus bar assembly 1501, and the other end can be connected to the second bus bar assembly 1502. The end plates 170, respectively provided on both sides of the plurality of battery cells 10, can be connected to the first bus bar assembly 1501 and the second bus bar assembly 1502 to accommodate the plurality of battery cells 10 therein.

[0085] Figure 4 is a diagram illustrating a bus bar assembly 150 according to one embodiment of the present disclosure.

[0086] The bus bar assembly 150 may include a bus bar 151 and a bus bar frame 155. The bus bar 151 may be supported by the bus bar frame 155. The bus bar 151 may be located in a direction farther from the plurality of battery cells 10 than the bus bar frame 155.

[0087] Each tab portion 12 of the plurality of battery cells 10 may be inserted into a slit hole (not shown) formed on the busbar frame 155. This is just an example, and a portion of the slit hole may also be formed as an open slit, or the tab portion 12 may be inserted into the busbar frame 155 in other ways and electrically connected to the busbar 151.

[0088] On the other hand, the bus bar assembly 150 of the present disclosure can be connected to adjacent components. The bus bar assembly 150 can be combined with the cell cover 130, or can be combined with the end plate 170, or can be connected to the upper cover 120 described later. The bus bar assembly 150 can be connected to at least one of the above components, or to all of the above components.

[0089] To this end, the busbar frame 155 may include a frame-connecting hole 1560 to facilitate connection with adjacent components. The frame-connecting hole 1560 may be formed on the front surface of the busbar frame 155. The front surface of the busbar frame 155 may refer to the surface facing the +X direction. The cell cover 130 and the busbar frame 155 may be connected via the frame-connecting hole 1560. To this end, the cell cover 130 may include a cell cover-connecting hole 134 at a position corresponding to the frame-connecting hole 1560.

[0090] The fixing member 300 can connect the cell cover 130 and the busbar frame 155. The fixing member 300 can pass through the cell cover 130. Alternatively, the fixing member 300 can pass through the busbar frame 155 or at least partially be inserted into the busbar frame 155. As an example, the fixing member 300 can be a bolt that passes through the cell cover connection hole 134 and then is inserted into the frame connection hole 1560 to connect them.

[0091] In addition, the busbar frame 155 may include a frame-combining hole 1580. The frame-combining hole 1580 may be formed on a side of the busbar frame 155. The side of the busbar frame 155 may refer to a surface facing the -Y direction or the +Y direction. The busbar frame 155 may be connected to the end plate 170 through the frame-combining hole 1580. Similar to the connection method of the frame connection hole 1560, the fixing member 300 passes through the end plate 170, and at least a portion of the fixing member 300 is inserted into the busbar frame 155 to connect them.

[0092] In addition, the busbar frame 155 may include a frame fixing hole 1570. The frame fixing hole 1570 may be formed on the upper surface of the busbar frame 155. The upper surface of the busbar frame 155 may refer to the surface facing the +Z direction. The busbar frame 155 may be connected to the cell cover 130 through the frame fixing hole 1570. In addition, the busbar frame 155 may be connected to the upper cover 120 to be described later through the frame fixing hole 1570. In the same manner as the connection method of the frame connection hole 1560, the upper cover 120 and the busbar assembly 150 may be connected through the frame fixing hole 1570. To this end, the cell cover 130 may include a cell cover fixing hole 135. The fixing component 300 is inserted into the frame fixing hole 1570 after passing through the cell cover fixing hole 135 to connect to each other.

[0093] Specifically, Figure 4 1 is a diagram illustrating a first bus bar assembly 1501 disposed on one side of a plurality of battery cells 10. A first bus bar 1511 may be located on a front surface of a first bus bar frame 1551. A plurality of first bus bars 1511 may be provided, and the plurality of first bus bars 1511 may be spaced apart and disposed along a predetermined stacking direction.

[0094] In addition, the first bus bar frame 1551 can extend along a predetermined stacking direction and can be provided in plurality. The plurality of first bus bar frames 1551a, 1551b can be connected to each other. The description of the first bus bar assembly 1501 can also be applied to the second bus bar assembly 1502.

[0095] On the other hand, the bus bar assembly 150 may further include a terminal 1590 for electrical connection with the outside. The terminal 1590 may be made of a material having conductivity.

[0096] Figure 5 1 is a diagram showing a cell cover 130 and a bus bar assembly 150 according to an embodiment of the present disclosure. Specifically, Figure 5 15 is a diagram illustrating the first cell cover 130 a and the first bus bar assembly 1501 .

[0097] The cell cover 130 may be disposed to face the front surface of the bus bar assembly 150. The front surface of the first bus bar assembly 1501 may refer to a surface facing the +X direction. Conversely, the front surface of the second bus bar assembly 1502 may refer to a surface facing the -X direction.

[0098] The cell cover 130 may include a coupling portion 133 protruding toward the side member 210, and the coupling portion 133 may be located on an upper portion of the side member 210. Figures 10 to 14In detail, the coupling portion 133 may protrude toward the side member 210. In other words, the cell cover 130 may be located between the side member 210 and the plurality of battery cells 10, and the coupling portion 133 may be formed to protrude toward the side member 210.

[0099] The coupling portion 133 may be formed in plurality at intervals along a predetermined stacking direction. The plurality of coupling portions 133 is formed to stably fix the receiving case 200 .

[0100] The coupling portion 133 may include a through-hole 1330 formed along the height direction of the housing 200. The height direction of the housing 200 may refer to a direction parallel to the Z direction. The fastening member 190, described later, may pass through the through-hole 1330 and be secured to the side member 210 to stably connect the cell cover 130 and the side member 210. This will be described in detail below.

[0101] On the other hand, the cell cover 130 may include a cover portion 131 covering a surface of at least one battery cell 10 on which the tab portion 12 is provided, and a protective portion 132 extending from one end of the cover portion 131 and located below the at least one battery cell 10. The cover portion 131 may cover the front surface of the bus bar assembly 150, and the protective portion 132 may protect the lower portion of the battery cell 10.

[0102] The lower portion of the battery cell 10 refers to the surface facing the −Z direction of the battery cell 10. As described above, the battery cell 10 includes at least one protrusion 15, and the protrusion 15 may protrude in the −Z direction by a predetermined length based on the folded portion 14.

[0103] If the protrusion 15 is damaged, the insulation structure of the battery cell 10 may be damaged, and thus the performance and stability may be reduced, so it is necessary to protect the protrusion 15. The protection portion 132 of the cell cover 130 can protect the protrusion 15 of the battery cell 10.

[0104] The protection portion 132 may be formed by bending one edge of the cover portion 131. Alternatively, the protection portion 132 and the cover portion 131 may be integrally formed by injection molding. Figure 12 and Figure 13 Provide detailed explanation.

[0105] On the other hand, the other end of the cover portion 131 may extend and be positioned above the bus bar assembly 150. A cell cover fixing hole 135 may be formed on one surface of the cell cover 130 located above the bus bar assembly 150. The cell cover fixing hole 135 may be formed at a position corresponding to the frame fixing hole 1570. The fixing member 300 may be inserted through the cell cover fixing hole 135 into the bus bar assembly 150. This connects the bus bar assembly 150 and the cell cover 130.

[0106] In addition, a cell cover connecting hole 134 may be formed on the cover portion 131 . The cell cover connecting hole 134 may be formed at a position corresponding to the frame connecting hole 1560 .

[0107] Figure 6 is a diagram illustrating the sensing portion 140 according to one embodiment of the present disclosure.

[0108] Reference Figure 6 The sensing portion 140 may include a support portion 141 formed on one side of the plurality of battery cells 10, a substrate portion 142 extending from both edges of the support portion 141, and a measuring portion 143. The support portion 141 and the substrate portion 142 may be connected and integrally formed and may have a tunnel shape.

[0109] The support portion 141 may cover the upper surfaces (eg, the surfaces facing the +Z direction) of the plurality of battery cells 10. The support portion 141 may cover all or only a portion of the upper surfaces of the plurality of battery cells 10. For example, the support portion 141 may be formed as a printed circuit board.

[0110] A control unit 144 may be formed on the support unit 141. The control unit 144 is used to control the electrical information of the battery cell 10 and transmit information to the outside. For example, the support unit 141 may include a temperature sensor.

[0111] Substrate portion 142 may be connected to an edge of support portion 141 and located on one side of busbar frame 155. Measuring portion 143 may be connected to busbar 151 and measure information about battery cells 10. The information measured by measuring portion 143 may be transmitted to control portion 144 via substrate portion 142. However, this is not a limitation, and sensing portion 140 may employ a known configuration for controlling and acquiring information about battery cells 10.

[0112] Figure 7 1 is a diagram illustrating a state in which the upper cover 120 , the cell cover 130 , and the end plate 170 are connected to each other according to one embodiment of the present disclosure.

[0113] The battery assembly 1000 of the present disclosure may further include an upper cover 120. The upper cover 120 is used to protect the plurality of battery cells 10. The upper cover 120 may cover one side of the plurality of battery cells 10. For example, the upper cover 120 may protect the upper surface of the plurality of battery cells 10.

[0114] At least a portion of the upper cover 120 may be located on an upper portion of the side member 210. The upper cover 120 may be connected to the side member 210 together with the cell cover 130 to stably support and fix the plurality of battery cells 10.

[0115] The upper cover 120 can be connected to the cell cover 130. The upper cover 120 can form an upper cover hole 121 at a position corresponding to the frame fixing hole 1570. Therefore, the upper cover hole 121, the frame fixing hole 1570, and the cell cover fixing hole 135 can be formed at corresponding positions, and the fixing member 300 can be inserted into the respective holes to connect or fix them to each other.

[0116] In addition, the cell cover connection holes 134 and the frame connection holes 1560 may be formed at corresponding positions, and the fixing members 300 may be inserted into the respective holes to be connected or fixed to each other.

[0117] Likewise, the end plates 170 may form end plate holes 171 at positions corresponding to the frame coupling holes 1580 , and the fixing members 300 may be inserted into the respective holes to be connected or fixed to each other.

[0118] Therefore, the upper cover 120, the frame fixing hole 1570, and the end plate 170 can be connected to form a rectangular parallelepiped shape with the lower surface of the plurality of battery cells 10 open. The lower surface may refer to the surface facing the -Z direction. On the other hand, the lower surface of the plurality of battery cells 10 can be protected by the housing 200, and the terminal 1590 can protrude from one side and be exposed to the outside, so that the plurality of battery cells 10 can be electrically connected to the outside.

[0119] Figure 8 is a diagram showing an accommodating housing 200 according to an embodiment of the present disclosure, Figure 9 It is enlarged to show Figure 8 Figure 1 of Section S1.

[0120] The container case 200 may include a container body 220, which may include an opening 221 on one side and accommodate a plurality of battery cells 10 through the opening 221. The side member 210 may extend from the container body 220 toward the battery cells 10. The side member 210 may be formed on the container body 220.

[0121] The receiving case 200 may further include a receiving cover 230 that is coupled to at least one of the receiving body 220 or the side member 210 to close the opening 221. In an embodiment, at least a portion of the receiving cover 230 may be located on the side member 210, and the receiving cover 230 is coupled to the side member 210 to form a side surface of the receiving space 222.

[0122] Reference Figure 8 , the side member 210 may extend on the receiving body 220 toward the receiving space 222. For example, the side member 210 may extend on the receiving body 220 along the +Z direction.

[0123] The side member 210 can separate the storage space 222. The storage space 222 can be divided into multiple spaces by the side member 210. The side member 210 can include a first member 211 and a second member 212. The first member 211 can extend in a direction parallel to the predetermined stacking direction on the storage body 220, and the second member 212 can extend in a direction perpendicular to the first member 211.

[0124] For example, the second member 212 may be formed between a pair of first members 211 facing each other to partition the accommodation space 222 .

[0125] The side member 210 may include a recessed portion 2110 formed by being recessed in a height direction of the receiving case 200 at a position of the side member 210 corresponding to at least a portion of the cell cover 130 .

[0126] As an example, the side members 210 may be stacked along the height direction of the housing 200 to form a columnar hollow portion. The hollow portion may extend in a horizontal direction perpendicular to the height direction. The recessed portion 2110 may be formed by cutting a portion of the outer side of the uppermost hollow portion. Thus, the hollow portion and the outside can be connected through the recessed portion 2110.

[0127] Specifically, refer to Figure 9 , more than one recessed portion 2110 may be formed on the first member 211. The coupling portion 133 may be located on each of the plurality of recessed portions 2110 to improve assembly stability. The recessed portion 2110 may be formed by cutting the hollow portion located at the uppermost end, so that the hollow portion located at the uppermost end can communicate with the outside.

[0128] On the other hand, the side member 210 may further include an insertion hole 2120 formed by recessing or penetrating a region of the side member 210 in the height direction of the receiving case 200. The insertion hole 2120 may be formed at a position corresponding to the through hole 1330 formed in the coupling portion 133 when a portion of the cell cover 130 is located on the side member 210.

[0129] A fastening member 190 to be described later may pass through the penetration hole 1330 and be inserted into the insertion hole 2120 to connect the cell cover 130 and the side member 210 .

[0130] In an embodiment, the insertion hole 2120 may be disposed to overlap with the recessed portion 2110 along the height direction of the receiving case 200. In other words, the insertion hole 2120 may be formed on the outer side of the recessed portion 2110.

[0131] The insertion hole 2120 may be formed on a partition plate between the uppermost hollow portion having the recessed portion 2110 and the lower hollow portion having the recessed portion 2110, as viewed in the height direction of the accommodating case 200. The partition plate may be recessed or penetrated to form the insertion hole 2120. Two adjacent hollow portions may be connected via the insertion hole 2120.

[0132] At least a portion of the cell cover 130 may be located on and supported by the side member 210. For example, the coupling portion 133 may be located on the side member 210.

[0133] On the other hand, the receiving case 200 may further form a mounting hole 2130. The mounting hole 2130 may be formed by recessing or penetrating an area of the receiving body 220 or the side member 210. Figure 9 , the mounting hole 2130 may be formed at a position of the side member 210 where the recessed portion 2110 is not formed. The mounting hole 2130 is used to connect or fix the side member 210 and the receiving cover 230.

[0134] Therefore, the receiving cover 230 includes a hole formed therethrough at a position corresponding to the mounting hole 2130 when the receiving cover 230 is located on the side member 210 , so that a fixing member can pass through the hole and the mounting hole 2310 to be connected to each other.

[0135] Figure 10 FIG. 1 is a diagram showing a state in which a battery cell 10 is housed in a housing case 200 according to an embodiment of the present disclosure. Figure 11 It is enlarged to show Figure 10 Figure 2 shows the S2 region of the α-D-type ...

[0136] Reference Figure 10 and Figure 11 The receiving cover 230 may close the opening portion 221 and be coupled to the side member 210. The coupling portions 133 of the cell cover 130 may be respectively located on the recessed portions 2110 of the side member 210.

[0137] In order to position the coupling portion 133 on the recessed portion 2110, the width of the coupling portion 133 may be smaller than the width of the recessed portion 2110. Here, the width of the coupling portion 133 may refer to the length of the coupling portion 133 measured along the direction in which the first member 211 extends (e.g., the Y direction), and the width of the recessed portion 2110 may also refer to the length of the recessed portion 2110 measured along the direction in which the first member 211 extends.

[0138] In addition, in order to position the coupling portion 133 on the recessed portion 2110, the cross-section of the coupling portion 133 and the cross-section of the recessed portion 2110 may have shapes corresponding to each other. Figure 10, the recessed portion 2110 and the coupling portion 133 may respectively have a trapezoidal shape, so that the coupling portion 133 may be seated on the recessed portion 2110 .

[0139] The battery assembly 1000 of the present disclosure may further include a fastening member 190. Simply by positioning the coupling portion 133 on the recessed portion 2110, the battery cell cover 130 and the side member 210 can be stably secured to each other. However, to prevent movement due to external shock and vibration, and to prevent movement in the height direction of the housing case 200, the fastening member 190 may be used to secure the cell cover 130 and the side member 210.

[0140] The fastening member 190 may connect the cell cover 130 and the side member 210. The fastening member 190 may pass through the cell cover 130 and be inserted into the side member 210 to connect the cell cover 130 and the side member 210. The fastening member 190 may be a bolt, but is not limited thereto.

[0141] Figure 12 is shown along Figure 10 The cross section of the AA' line is shown in FIG. Figure 13 is shown along Figure 10 Figure 1 is a cross-section taken along line BB'.

[0142] Specifically, Figure 12 A cross section of a region where the coupling portion 133 is located on the recessed portion 2110 is shown. Figure 12 is Figure 11 The present invention further provides an example of a battery assembly 1000 including a receiving cover 230 based on the upper cover 120. That is, the receiving cover 230 can cover the upper cover 120, and at least a portion of the receiving cover 230 can be located on the side member 210. The receiving cover 230 can be passed through by the fixing member 300 and fixed to the side member 210.

[0143] As described above, the cell cover 130 may extend toward the inside of the battery cell 10 to protect the lower portion of the battery cell 10. For example, the cell cover 130 may include a protection portion 132 extending along the -Y axis direction to protect the protrusion 15 of the battery cell 10.

[0144] One end of the tab 12 may protrude through the busbar assembly 150. A cover 131 may be positioned between the battery cell 10 and the side member 210 to cover the tab 12. Even in the event of an external impact, the cover 131 prevents the tab 12 from being damaged by the side member 210. The battery cell cover 130 may be integrated with the busbar assembly 150, thereby maintaining a stable position even in the event of an impact. In an embodiment, the cover and tab may be formed perpendicularly.

[0145] The coupling portion 133 may protrude from the cover portion 131 toward the side member 210. That is, the coupling portion 133 may protrude in the +Y direction from the cover portion 131. The coupling portion 133 may be located on the recessed portion 2110, thereby suppressing movement of the cell cover 130.

[0146] The fastening member 190 may pass through the penetration hole 1330, and at least a portion of the fastening member 190 may be inserted into the insertion hole 2120. That is, each coupling portion 133 and the side member 210 may be stably coupled by the fastening member 190.

[0147] When the upper cover 120 is placed on the cell cover 130, the fastening member 190 can pass through the upper cover 120 and the cell cover 130. Specifically, the fastening member 190 can pass through the upper cover 120 and the cell cover 130, and at least a portion of the fastening member 190 can be inserted into the side member 210. This allows the upper cover 120 and the cell cover 130 to be secured to the side member 210, thereby stably securing the multiple battery cells 10 located therein. Furthermore, the upper cover 120 can be secured to the side member 210 without requiring additional components, thereby reducing manufacturing costs and increasing the energy density of the battery assembly 1000.

[0148] Figure 13 13 is a diagram showing a cross section of a region excluding the bonding portion 133 and the recessed portion 2110. Figure 13 is Figure 11 The battery cell cover 130 may further include a cover portion 131 supporting the tab portion 12 and a protective portion 132 located below the battery cell 10. However, the coupling portion 133 protruding toward the side member 210 may not be formed.

[0149] On the other hand, refer to Figure 12 and Figure 13 The battery assembly 1000 of the present disclosure may further include a heat conductive portion 250 coated on the container 200 and containing a heat conductive material. The heat conductive portion 250 may be coated on the container 200 before the plurality of battery cells 10 are accommodated through the opening 221 .

[0150] The heat conducting portion 250 may include a thermally conductive material and may further include an adhesive material, such as a heat dissipating adhesive. Thus, the plurality of battery cells 10 may be bonded to the bottom surface of the container body 220 via the heat conducting portion 250 .

[0151] Furthermore, a pressurizing portion 240 made of an elastic material may be included on one side of the housing cover 230, the side facing the plurality of battery cells 10. This is to protect the battery cells 10. If the battery cells 10 are pressurized by the housing cover 230, the outer casing 16 of the battery cells 10 may be damaged. Therefore, the pressurizing portion 240 made of an elastic material is added to cushion the impact.

[0152] Figure 14 1 is a diagram showing a state where a battery assembly 1000 according to an embodiment of the present disclosure is viewed from above.

[0153] The battery assembly may include a battery pack composed of a plurality of battery cells. A plurality of battery packs BG1, BG2, BG3, and BG4 may be located in the accommodation space. The shapes of the battery cell covers on both sides of each battery pack may be different. Figure 3 , the number and positions of the coupling parts formed on the first cell cover 130a and the second cell cover 130b may be different.

[0154] Reference Figure 14 The second cell cover 130b at the other end of any battery group BG1 and the first cell cover 130a at one end may be formed differently. For example, the second cell cover 130b at the other end may have five joints, while the first cell cover 130a at the one end may have six joints.

[0155] The reason for forming the cell cover 130 in different shapes is to prevent the coupling portion 133 from being located at the same position and overlapping. That is, the position of the coupling portion 133 of the cell cover 130 and the position of the recessed portion 2110 of the side member 210 can be changed, and the shapes of the first member 211a and the second member 212a can also be changed.

[0156] The present disclosure can be changed and implemented in various forms, so the scope of the rights of the present disclosure is not limited to the above embodiments. The above content is only an example of applying the principles of the present disclosure, and other configurations may also be included without departing from the scope of the present invention.

Claims

1. A battery assembly comprising: A plurality of battery cells are arranged along a predetermined stacking direction; a cell cover, covering a tab portion protruding from one side of at least one of the plurality of cell cells; A housing for accommodating the plurality of battery cells; as well as a side member extending from the housing toward the plurality of battery cells, At least a portion of the cell cover is located on an upper portion of the side member and supported by the side member.

2. The battery assembly according to claim 1, wherein: The cell cover includes a coupling portion protruding toward the side member, and the coupling portion is located on an upper portion of the side member.

3. The battery assembly according to claim 2, wherein: A plurality of the coupling portions are formed at intervals along the predetermined stacking direction.

4. The battery assembly according to claim 2, wherein: The coupling portion includes a through hole formed through the accommodating shell in a height direction.

5. The battery assembly according to any one of claims 1 to 4, wherein The battery cover comprises: a cover portion, covering a side of the at least one battery cell where the tab portion is provided; and The protection portion extends from one end of the cover portion and is located below the at least one battery cell.

6. The battery assembly according to any one of claims 1 to 4, wherein: The side member includes a recessed portion formed by being recessed in a height direction of the housing case at a position of the side member corresponding to at least a portion of the cell cover.

7. The battery assembly according to any one of claims 1 to 4, further comprising: a busbar assembly electrically connecting the plurality of battery cells, The bus bar assembly is located between the cell cover and the plurality of battery cells.

8. The battery assembly according to any one of claims 1 to 4, further comprising: A fastening component connects the cell cover and the side member.

9. The battery assembly according to claim 8, wherein: The side member includes an insertion hole, which is formed by being recessed or penetrated in a region of the side member along a height direction of the accommodating case. The fastening member passes through the cell cover, and one end of the fastening member is inserted into the insertion hole.

10. The battery assembly according to any one of claims 1 to 4, further comprising: The upper cover is connected to the battery cell cover and covers the upper surfaces of the plurality of battery cells.

11. The battery assembly according to claim 10, wherein: At least a portion of the upper cover is located on an upper portion of the side member.

12. The battery assembly according to claim 11, further comprising: A fastening component connects the upper cover, the battery cell cover and the side member.

13. The battery assembly according to claim 12, wherein: The fastening member passes through the upper cover and the cell cover, and at least a portion of the fastening member is inserted into the side member.

14. The battery assembly according to any one of claims 1 to 4, wherein: The accommodating shell includes: a receiving body including an opening on one side and receiving the plurality of battery cells through the opening; and A receiving cover is combined with at least one of the receiving body or the side member to close the opening.

15. The battery assembly according to claim 14, wherein: A surface of the housing cover, which is opposite to the plurality of battery cells, includes a pressurizing portion made of an elastic material.

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