Battery assembly

Abstract

The present disclosure relates to a battery assembly. The battery assembly comprises a plurality of battery cells, wherein each battery cell comprises an electrode assembly and a shell for accommodating the electrode assembly; an exhaust part formed on one surface of the housing of each of the plurality of cells; a tab part which is formed on at least one surface of the housing of each of the plurality of cells so as to connect the electrode assembly to the outside; and at least a part of the battery cells in the plurality of battery cells are stacked along a first direction towards which the exhaust part faces.

Description

Technical Field

[0001] This disclosure relates to a battery assembly. Background Technology

[0002] A secondary battery is a battery that can convert electrical energy into chemical energy and store it, allowing it to be reused multiple times through charging and discharging. Due to its economic and environmentally friendly characteristics, secondary batteries are widely used in various industries. In particular, lithium secondary batteries are widely used in industries including portable devices requiring high-density energy.

[0003] During repeated use of secondary batteries, gas may be generated inside. If this gas is not vented from the battery, it may explode or catch fire. Therefore, it is essential to vent the gas from inside the secondary battery. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The technical problem to be solved by this disclosure is to provide a battery assembly with improved stability.

[0006] Another technical problem this disclosure aims to solve is to provide a battery assembly with improved assemblability.

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

[0008] In addition, this disclosure can be used for eco-friendly electric vehicles, hybrid vehicles, etc., to prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0009] (II) Technical Solution

[0010] The battery assembly according to this disclosure includes: a plurality of cells, each of the plurality of cells including an electrode assembly and a housing for housing the electrode assembly; an exhaust portion formed on one side of the housing of each of the plurality of cells; a tab portion formed on at least one side of the housing of each of the plurality of cells to connect the electrode assembly to the outside; and a battery pack, wherein at least a portion of the plurality of cells are stacked along a first direction toward which the exhaust portion is oriented.

[0011] The tab portion can be formed in a second direction perpendicular to the first direction.

[0012] The vent of each cell located on the outermost side of the battery pack along the first direction can be respectively arranged facing outward.

[0013] Multiple battery packs can be provided, and the multiple battery packs can be arranged along a third direction that is perpendicular to the first direction and the second direction, respectively.

[0014] The electrode portion may include a first electrode and a second electrode connected to the electrode assembly, and the first electrode and the second electrode may be formed facing opposite directions to each other.

[0015] The battery assembly may further include a busbar assembly for electrically connecting the plurality of battery cells.

[0016] The busbar assembly can be configured to face the tabs of the plurality of battery cells respectively along the second direction.

[0017] The battery assembly may further include a cooling component for cooling the plurality of battery cells.

[0018] The cooling component can be disposed between two adjacent cells in the plurality of cells.

[0019] The cooling component can be disposed between one cell and another cell in the battery pack.

[0020] The cooling component can be inserted into the busbar assembly.

[0021] The battery assembly may further include a housing for accommodating the plurality of battery cells.

[0022] The housing may include a through portion in the region corresponding to the exhaust portion.

[0023] The battery assembly may further include a heat insulation component disposed between the plurality of battery cells.

[0024] The heat insulation component can be disposed between one cell and another cell in the battery pack.

[0025] (III) Beneficial Effects

[0026] According to one embodiment of this disclosure, a battery assembly with improved stability can be provided.

[0027] Alternatively, a battery assembly with improved assemblability can be provided. Attached Figure Description

[0028] Figure 1 A battery cell according to an embodiment of the present disclosure is shown.

[0029] Figure 2 An exploded view shows a battery cell according to an embodiment of the present disclosure.

[0030] Figure 3 A battery assembly according to one embodiment of the present disclosure is shown.

[0031] Figure 4 and Figure 5 A battery assembly according to one embodiment of the present disclosure is shown.

[0032] Figure 6 and Figure 7 A battery assembly according to another embodiment of the present disclosure is shown.

[0033] Figure 8 and Figure 9 A battery assembly according to another embodiment of the present disclosure is shown.

[0034] Figure 10 A battery assembly according to another embodiment of the present disclosure is shown.

[0035] Figure 11 A battery assembly according to another embodiment of the present disclosure is shown.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100: Cell; 150: Battery Pack

[0038] 400: Cooling components; 500: Heat insulation components Detailed Implementation

[0039] The present disclosure will now 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 illustrated herein.

[0040] The specific terms used in this specification are for illustrative purposes only and are not intended to limit the exemplary embodiments.

[0041] For example, expressions such as "same" and "identical" not only indicate the same state in a strict sense, but also indicate the state where there are tolerances or differences in achieving the same level of functionality.

[0042] For example, expressions such as "in a certain direction", "along a certain direction", "parallel", "perpendicular", "centered on", "concentric", or "coaxial" indicate relative or absolute settings, which not only indicate such settings in a strict sense, but also indicate a state of relative displacement of angles or distances with tolerances or to the same degree in function.

[0043] To illustrate this disclosure, the following explanation will be based on an orthogonal spatial coordinate system in which the X, Y, and Z axes are orthogonal to each other. The directions of each axis (X-axis direction, Y-axis direction, Z-axis direction) refer to the two directions in which each axis extends.

[0044] The X, Y, and Z directions mentioned below are used for the purpose of clearly understanding this disclosure. Of course, the directions may have different definitions depending on the reference.

[0045] The terms "first," "second," "third," etc., used to refer to components in this disclosure are merely for the purpose of avoiding confusion and do not imply any order, importance, or hierarchical relationship between the components. For example, this disclosure may include only the second component and exclude the first component.

[0046] The terminology used in this disclosure is for the purpose of describing particular embodiments and not for limiting the scope of the claims. As used in the description of the embodiments and in the appended claims, the singular forms include the plural forms as well, unless the context clearly indicates otherwise.

[0047] Figure 1 A battery cell 100 according to an embodiment of the present disclosure is shown. Figure 2 An exploded view shows a battery cell 100 according to an embodiment of the present disclosure.

[0048] The battery assembly 10 disclosed herein includes: a plurality of battery cells 100, the plurality of battery cells 100 being distributed to an electrode assembly 120 and a housing 110 for housing the electrode assembly 120; an exhaust portion 117 formed on one side of each of the plurality of battery cells 100 housings 110; a tab portion 119 formed on at least one side of each of the plurality of battery cells 100 housings 110 for connecting the electrode assembly 120 to the outside; and a battery pack 150, wherein at least a portion of the plurality of battery cells 100 are stacked along a first direction toward which the exhaust portion 117 is oriented.

[0049] Cell 100 can refer to a rechargeable battery capable of charging and discharging electrical energy and being used repeatedly. In one example, cell 100 can refer to a lithium rechargeable battery or a lithium-ion battery, but is not limited to these. In another example, cell 100 can refer to an all-solid-state battery.

[0050] The battery cell 100 can be classified into pouch-shaped, prismatic, or cylindrical secondary batteries according to its shape. For ease of description, this manual uses a prismatic secondary battery as an example, but it is not limited to this type.

[0051] On the other hand, the battery assembly 10 described in this specification may refer to the grouping of battery cells 100 into one or more groups and placing them in the housing 300 to protect the battery cells 100 from external impacts, heat, vibration, etc., and to have high output and high capacity characteristics.

[0052] In an embodiment, the battery assembly 10 may be formed in a cell-to-pack structure that includes a plurality of cells 100 in a housing 300.

[0053] In another embodiment, the battery assembly 10 may not be a cell-to-cell battery pack structure, but rather a structure comprising multiple battery modules. First, battery modules can be manufactured by grouping multiple cells 100 into their respective module housings, and then the battery assembly 10 can be manufactured by placing the manufactured battery modules into a battery pack housing.

[0054] The battery cell 100 includes an electrode assembly 120 and a housing 110 for accommodating the electrode assembly 120. Multiple battery cells 100 may each include an electrode assembly 120 and a housing 110.

[0055] Electrode assembly 120 can generate electrical energy through an electrochemical reaction. Electrode assembly 120 may include electrodes. Electrodes may include electrode active materials. Electrodes may include a positive electrode 121 and a negative electrode 123.

[0056] The electrode assembly 120 may further include a separator 125. The separator 125 prevents short circuits between the positive electrode 121 and the negative electrode 123. In an embodiment, the separator 125 may be disposed between the positive electrode 121 and the negative electrode 123. The separator 125 may include, but is not limited to, a porous polymer film.

[0057] The housing 110 may form a receiving space therein. The electrode assembly 120 may be received in the receiving space. The housing 110 may include a main body portion 113 and a cover portion 115.

[0058] The main body 113 may include an opening on at least one side. The electrode assembly 120 can be inserted into the main body 113 through the opening. The opening may be formed on one side of the main body 113 and on the opposite side. The main body 113 may be formed in a hexahedral shape.

[0059] The cover portion 115 can be combined with the main body portion 113. The cover portion 115 can be combined with the main body portion 113 to cover the receiving space. The cover portion 115 can be inserted into the opening and connected to the main body portion 113. In an embodiment, after the electrode assembly 120 is inserted into the main body portion 113 through the opening, the cover portion 115 can close the opening.

[0060] The battery cell 100 may include a tab 119 that protrudes from the housing 110 to connect the electrode assembly 120 to the outside. Multiple battery cells 100 may each include a tab 119.

[0061] One end of the tab 119 can be connected to the electrode assembly 120 inside the housing 110, and the other end of the tab 119 can protrude outside the housing 110. The tab 119 may include a first tab 1191 and a second tab 1192 respectively connected to the electrode assembly 120. The first tab 1191 and the second tab 1192 may be formed facing opposite directions to each other.

[0062] Reference Figure 1 and Figure 2 The first tab 1191 can protrude from one side of the housing 110 along the X-axis. In addition, the second tab 1192 can protrude from the other side of the housing 110 along the X-axis.

[0063] The battery cell 100 may further include a venting portion 117. The venting portion 117 may be formed on one side of the housing 110. The venting portion 117 may be formed on one side of the main body 113. The venting portion 117 may be provided in the form of a recess extending from the outer side of the main body 113 toward the interior. In other words, the venting portion 117 may be provided in the form of a recess extending from the outer side toward the interior. In an embodiment, the venting portion 117 may be a notch.

[0064] Battery cell 100 can be used multiple times through repeated charging and discharging. The gas generated during this process increases the internal pressure of battery cell 100. If this gas is not released, battery cell 100 may pose an explosion risk. Therefore, to ensure stable use of battery cell 100, the gas generated inside battery cell 100 needs to be released to the outside.

[0065] An exhaust vent 117 can be formed on one side of the housing 110, through which gas can be discharged. The shape of the exhaust vent 117 may change when the internal pressure of the housing 110 increases. The exhaust vent 117 can be opened to allow gas to escape to the outside of the housing 110. This allows the gas to be guided to flow along a path desired by the user.

[0066] The exhaust portion 117 and the tab portion 119 can be formed on different surfaces of the housing 110. When the exhaust portion 117 is formed on one surface of the housing 110, the tab portion 119 can be formed on the surface where the exhaust portion 117 is not formed.

[0067] In this disclosure, the direction in which the exhaust portion 117 faces can be defined as a first direction. In this case, the electrode portion 119 can be formed in a second direction perpendicular to the first direction. (See reference...) Figure 1 and Figure 2The first direction can refer to the Z-axis direction, and the second direction can refer to the X-axis direction.

[0068] Figure 3 A battery assembly 10 according to an embodiment of the present disclosure is shown. Specifically, Figure 3 This is a view of the battery assembly 10 from the front.

[0069] The battery assembly 10 may further include a housing 300. The housing 300 may house multiple battery cells 100. The housing 300 may include a support body 310 and a cover body 320. The support body 310 may be coupled to the cover body 320. The support body 310 and the cover body 320 may be coupled to protect the multiple battery cells 100 located inside from external heat, vibration or impact.

[0070] The support body 310 can support multiple battery cells 100. The support body 310 may include a lower body 313. The multiple battery cells 100 may be disposed on the lower body 313. The support body 310 may further include a side body 315. The side body 315 may cover the sides of the multiple battery cells 100.

[0071] The side body 315 can extend from the lower body 313 toward the direction where the plurality of battery cells 100 are located. In an embodiment, the side body 315 can extend upward from the edge of the lower body 313.

[0072] The cover body 320 can cover multiple battery cells 100. In an embodiment, the cover body 320 can be combined with the side body 315. The lower body 313, the side body 315 and the cover body 320 can be combined to form a hexahedral shape with openings at the front and rear.

[0073] In another embodiment, the side body 315 may not need to be provided separately. If a prismatic cell 100 is used, the outer casing 110 of the cell 100 can be made of a material with high rigidity. Because the outer casing 110 of the cell 100 has high rigidity, there is no need to provide a separate side casing 110, thereby reducing weight.

[0074] In one embodiment, the cell 100 may further include an end plate (not shown). The end plate may be coupled to a housing 300. In another embodiment, the end plate may be coupled to the housing 300 at both the front and rear. (Refer to...) Figure 3 The end plate can be combined with the housing 300 in the Y-axis direction.

[0075] On the other hand, the housing 300 may include a through portion 330 in the region corresponding to the vent portion 117. The battery cell 100 may be disposed on the lower body 313. The through portion 330 may be formed in the region corresponding to the vent portion 117 of the disposed battery cell 100, and multiple through portions 330 may be formed.

[0076] Gas discharged from the battery cell 100 can move through the through-hole 330. The gas can move into the housing 300 through the through-hole 330. That is, an exhaust path can be formed inside the housing 300.

[0077] Specifically, Figure 3 This is a view before the vent 117 is opened. In this case, the gas in the cell 100 is not expelled to the outside. However, when the internal pressure of the cell 100 rises, the vent 117 can be opened, and the gas can be discharged through the opened vent 117. The discharged gas can flow along the interior of the lower body 313 through the through-hole 330.

[0078] Figure 3 Only the through portion 330 formed in the lower body 313 is shown, but the through portion 330 may also be formed in the cover body 320.

[0079] At least a portion of the multiple battery cells 100 can be stacked along a first direction toward which the vent 117 faces to form a battery pack 150. (Refer to...) Figure 3 At least a portion of the multiple battery cells 100 can be stacked along the Z-axis direction. By stacking multiple battery cells 100 along a first direction, the energy density of the battery assembly 10 can be increased.

[0080] The battery assembly 10 disclosed herein may further include a heat insulation component 500. The heat insulation component 500 can delay heat transfer. The thermal conductivity of the heat insulation component 500 can be lower than a preset value.

[0081] A heat insulation component 500 may be disposed between one cell 100 and another cell 100 included in the battery pack 150. The heat insulation component 500 may also be disposed between two adjacent cells 100 along a first direction. Thus, the heat insulation component 500 can delay heat propagation along the first direction.

[0082] Reference Figure 3 Even if the upper cell 100 along the Z-axis experiences heat or fire, the heat or fire will not be transmitted to the lower cell 100.

[0083] The vent 117 of the cell 100 located at the lowest end of the battery pack 150 along the first direction can be arranged downwards, while the vent 117 of the cell 100 located at the highest end of the battery pack 150 can be arranged upwards.

[0084] The vent 117 of each cell located on the outermost side of the battery pack 150 along the first direction can be respectively oriented outwards. (Refer to...) Figure 3The vent 117 of the uppermost cell 100 along the Z-axis can be oriented upwards. The vent 117 of the lowermost cell 100 can be oriented downwards.

[0085] By arranging the cell 100 in this structure, venting paths can be formed in the upper and lower parts of the battery pack 150, respectively. Because venting paths are formed in the upper and lower parts of the battery pack 150, venting can be effectively achieved.

[0086] The battery assembly 10 may further include a busbar assembly 200 for electrically connecting a plurality of battery cells 100.

[0087] The busbar assembly 200 can be configured to face the tabs 119 of the plurality of cells 100 along the second direction. The tabs 119 can be inserted into the busbar assembly 200, allowing a stable connection between the tabs 119 and the busbar assembly 200. The structure of the busbar assembly 200 will be described below. Figures 4 to 11 Please provide a detailed explanation.

[0088] Busbar assembly 200 may include busbar 220. Busbar 220 may be made of conductive material. Busbar 220 may electrically connect multiple battery cells 100. Busbar 220 may be electrically connected to each tab 119 of two adjacent battery cells 100.

[0089] The busbar assembly 200 may further include a busbar frame 210. The busbar 220 may be fixed to the busbar frame 210. The busbar frame 210 may be made of an insulating material.

[0090] Figure 4 and Figure 5 A battery assembly 10 according to one embodiment of the present disclosure is shown.

[0091] Multiple battery packs 150 may be provided, and the multiple battery packs 150 may be arranged along a third direction that is perpendicular to the first direction and the second direction, respectively.

[0092] Two battery cells 100 can be stacked along a first direction to form a battery pack 150. The battery pack 150 can be arranged along a third direction. Therefore, multiple battery cells 100 can be arranged along both the first and third directions. (See reference...) Figure 4 The third direction can refer to the Y-axis direction.

[0093] The busbar assembly 200 can be configured to face the plurality of battery cells 100 along a second direction. The busbar assembly 200 may include: a first busbar assembly 201 disposed on one side of the plurality of battery cells 100; and a second busbar assembly 202 disposed on the other side of the plurality of battery cells 100. The busbars 220 of the first busbar assembly 201 and the busbars 220 of the second busbar assembly 202 may be arranged differently from each other.

[0094] The busbar assembly 200 may include a terminal section 230. The terminal section 230 may be electrically connected to an external device.

[0095] On the other hand, depending on the arrangement structure of the busbar 220 of the first busbar assembly 201 and the arrangement structure of the busbar 220 of the second busbar assembly 202, the electrical connection method of the multiple battery cells 100 can be different.

[0096] Reference Figure 4 Each cell 100 in the battery pack 150 has its first tab 1191 facing opposite directions. Taking the leftmost battery pack 150 as a reference, the first tab 1191 of the upper cell 100 can face forward, and the first tab 1191 of the lower cell 100 can face backward.

[0097] The busbar 220 of the first busbar assembly 201 can extend along a third direction. The busbar 220 of the second busbar assembly 202 can extend along a first direction. With this structure, multiple cells 100 can be connected in series with each other. On the other hand, the arrangement of the busbar 220 of the first busbar assembly 201 and the busbar 220 of the second busbar assembly 202 can be changed to obtain the output and performance required by the user.

[0098] Additionally, the battery assembly 10 may further include a cooling component 400. The cooling component 400 may contact the battery cell 100 to cool the battery cell 100. The cooling component 400 may be configured in various ways. In one embodiment, the cooling component 400 may include channels for the flow of refrigerant. The refrigerant may be air or water, but is not limited to these.

[0099] The cooling component 400 can be disposed between two adjacent cells 100 in a plurality of cells 100. By contacting the adjacent cells 100 respectively, the temperature of the cells 100 can be reduced.

[0100] On the other hand, the cooling component 400 can be inserted into the busbar assembly 200. Inserting the cooling component 400 into the busbar assembly 200 improves structural stability. The busbar assembly 200 may further include an insertion portion 240. The insertion portion 240 can be formed by extending through the busbar frame 210. The insertion portion 240 can be formed corresponding to the shape of the cooling component 400. The insertion portion 240 can be formed by extending through the busbar frame 210 along a second direction. (Refer to...) Figure 4 The cooling component 400 can be inserted into the insertion part 240.

[0101] Figure 5 Viewed from above Figure 4 A view of the battery assembly 10. A cooling component 400 may be disposed between the battery packs 150 disposed along a third direction. Additionally, the cooling component 400 may pass through the insertion portion 240, and one end of the cooling component 400 may protrude to the outside of the busbar assembly 200.

[0102] Figure 6 and Figure 7 A battery assembly 10 according to another embodiment of the present disclosure is shown.

[0103] Figure 6 The battery assembly 10 shown is identical to the one with the cooling component 400 except for the location of the cooling component 400. Figure 4 The battery assembly 10 shown is the same. A cooling component 400 may be disposed between one cell 100 and another cell 100 included in the battery pack 150. That is, the cooling component 400 may be disposed between two adjacent cells 100 along a first direction.

[0104] In this configuration, the cooling component 400 may also extend in a third direction. The cooling component 400 may be formed in the shape of a plate. The cooling component 400 separates the upper and lower cells 100 in each battery pack 150.

[0105] In this embodiment, the cooling component 400 can be made of a material with high mechanical rigidity. Therefore, even if the cells 100 are stacked along the first direction, high structural stability can be maintained.

[0106] Alternatively, the cooling component 400 can be replaced with the heat insulation component 500. In this case, even if a fire occurs in either the upper or lower battery cell 100, the spread of heat can be slowed.

[0107] Reference Figure 6Since the cooling component 400 extends in a third direction, the insertion portion 240 can be formed in the first busbar assembly 201. This is because, since the busbar 220 of the second busbar assembly 202 extends in a first direction, the insertion portion 240 cannot be formed in a third direction.

[0108] Figure 7 Viewed from above Figure 6 A view of the busbar assembly 200 in the battery pack 150. A cooling component 400 may be disposed between the lower and upper battery cells 100 in the battery pack 150. One end of the cooling component 400 may protrude to the outside through the insertion portion 240 of the first busbar assembly 201.

[0109] Figure 8 and Figure 9 A battery assembly 10 according to another embodiment of the present disclosure is shown.

[0110] Figure 8 The battery assembly 10 shown, except for the first busbar assembly 201 and the second busbar assembly 202, is similar to... Figure 4 The battery assembly 10 shown is the same. Figure 4 In the battery assembly 10 shown, terminal portions 230 are provided at both ends of the first busbar assembly 201. (Refer to...) Figure 8 Terminal portions 230 can be disposed together at one end of the first busbar assembly 201. Additionally, the arrangement structure of the busbar 220 can be changed to alter the output of the multiple battery cells 100.

[0111] On the other hand, multiple cooling components 400 can be provided, one of which can be inserted into the first busbar assembly 201, and another can be inserted into the second busbar assembly 202. (See also...) Figure 8 Two cooling components 400 can be inserted into the first busbar assembly 201, and one cooling component 400 can be inserted into the second busbar assembly 202. Thus, multiple battery cells 100 can be stably electrically connected, while simultaneously improving structural stability.

[0112] Figure 9 Viewed from above Figure 8 The diagram shows a view of the battery assembly 10. Two cooling components 400 can protrude outward through the insertion portion 240 of the first busbar assembly 201, and one cooling component 400 can protrude outward through the insertion portion 240 of the second busbar assembly 202.

[0113] Figure 10 A battery assembly 10 according to another embodiment of the present disclosure is shown.

[0114] and Figure 4 Compared to battery module 10, Figure 10The diagram shows a case where the number of battery packs 150 in the battery assembly 10 is odd. Terminal portions 230 may be provided at both ends of the first busbar assembly 201, and busbars 220 for electrically connecting multiple battery cells 100 may be provided.

[0115] On the other hand, although the cooling component 400 is not shown in the figure, it is of course possible to provide a cooling component 400. In this case, since the busbar 220 of the second busbar assembly 202 extends along the first direction, it is preferable to form an insertion portion 240 in the second busbar assembly 202.

[0116] Figure 11 A battery assembly 10 according to another embodiment of the present disclosure is shown.

[0117] Figure 11 The battery assembly 10 shown, except for the first busbar assembly 201 and the second busbar assembly 202, is similar to... Figure 10 The battery assembly 10 shown is the same. Figure 10 In the battery assembly 10 shown, terminal portions 230 are provided at both ends of the first busbar assembly 201. (Refer to...) Figure 11 Terminal portions 230 can be disposed together at one end of the first busbar assembly 201. Alternatively, the arrangement of the busbar 220 can be modified to electrically connect multiple battery cells 100.

[0118] Of course, in this case, a cooling component 400 may also be provided. The insertion portion 240 may be formed between the busbars 220 of the first busbar assembly 201. The cooling component 400 may be inserted into the insertion portion 240 of the first busbar assembly 201.

[0119] On the other hand, although Figures 4 to 11 The cooling component is described, but it can certainly be replaced by a heat insulation component. That is, the heat insulation component can be inserted into the busbar assembly and can be placed between multiple cells.

[0120] This disclosure can be implemented in various forms and variations, and its scope is not limited to the embodiments described above. The above content is merely an example of applying the principles of this disclosure, and other configurations may be included without departing from the scope of the invention.

Claims

1. A battery assembly, comprising: Multiple battery cells, each of the multiple battery cells including an electrode assembly and a housing for accommodating the electrode assembly; An exhaust section is formed on one side of the casing of each of the plurality of battery cells; A tab is formed on at least one side of the housing of each of the plurality of cells to connect the electrode assembly to the outside; as well as A battery pack in which at least a portion of the plurality of cells are stacked along a first direction toward which the venting portion faces.

2. The battery assembly according to claim 1, wherein, The tab is oriented in a second direction perpendicular to the first direction.

3. The battery assembly according to claim 1 or 2, wherein, The exhaust portion of each cell located on the outermost side of the battery pack along the first direction is respectively arranged facing outward.

4. The battery assembly according to claim 2, wherein, The battery packs are provided in multiple ways, and the multiple battery packs are arranged along a third direction that is perpendicular to the first direction and the second direction, respectively.

5. The battery assembly according to claim 1 or 2, wherein, The electrode portion includes a first electrode and a second electrode, which are respectively connected to the electrode assembly, and the first electrode and the second electrode are formed facing opposite directions to each other.

6. The battery assembly according to claim 2, further comprising: A busbar assembly for electrically connecting the plurality of battery cells.

7. The battery assembly according to claim 6, wherein, The busbar assembly is configured to face the tabs of the plurality of battery cells respectively along the second direction.

8. The battery assembly according to any one of claims 1, 2, 4 and 6, further comprising: A cooling component for cooling the plurality of battery cells.

9. The battery assembly according to claim 8, wherein, The cooling component is disposed between two adjacent cells in the plurality of cells.

10. The battery assembly according to claim 9, wherein, The cooling component is disposed between one cell and another cell in the battery pack.

11. The battery assembly according to claim 8, wherein, The cooling component is inserted into the busbar assembly.

12. The battery assembly according to claim 1, further comprising: A housing for accommodating the plurality of battery cells.

13. The battery assembly according to claim 12, wherein, The housing includes a through portion in the region corresponding to the exhaust portion.

14. The battery assembly according to claim 1 or 2, further comprising: A heat insulation component is disposed between the plurality of battery cells.

15. The battery assembly of claim 14, wherein, The heat insulation component is disposed between one cell and another cell in the battery pack.

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