Battery pack and method of manufacturing the same

Abstract

The present invention includes a frame having an interior space; a plurality of battery cells each having one end disposed in the interior space of the frame and another end protruding outward from one side of the frame; a cell holder mounted at one side of the frame; a heat sink mounted in the cell holder; a plurality of supports positioned in portions of the spaces between the battery cells; and a filler material filling remaining spaces among the spaces between the battery cells that are not positioned with the supports. The amount of the filler material can be adjusted according to the number of the provided supports.

Description

Technical Field

[0001] This invention relates to a battery pack and a method for manufacturing the same, and more specifically, to a battery pack and a method for manufacturing the same capable of stably supporting and storing battery cells. Background Technology

[0002] Typically, battery cells can be repeatedly charged and discharged through the electrochemical reactions of their components. Battery packs can include multiple battery cells to increase output voltage or output current.

[0003] Here, because the battery cells in the battery pack are densely arranged, it is important to dissipate the heat generated from each battery cell. When the heat generated from the battery cells is not properly dissipated during charging and discharging, heat can accumulate in the battery pack, causing the battery cells to overheat. As a result, the battery cells can ignite and explode.

[0004] Typically, when manufacturing battery packs, filler material is injected into the spaces between the battery cells. Because the filler material can hold the battery cells in place and easily dissipate heat generated from them, it can delay or prevent the cells from igniting or exploding. However, it is difficult to fill the entire space between the battery cells evenly, and filling this space requires significant time and cost.

[0005] (Patent Document 1) KR2019-0132631A Summary of the Invention

[0006] Technical issues

[0007] This invention provides a battery pack capable of stably supporting and storing battery cells, and a method for manufacturing the same.

[0008] The present invention also provides a battery pack and a method thereof that can reduce the amount of filling material used in the space between battery cells.

[0009] Technical solution

[0010] According to an exemplary embodiment, a battery pack includes: a frame having an internal space and an open side; a plurality of battery cells, each of the plurality of battery cells having one end disposed in the internal space of the frame and another end protruding to the outside of the side of the frame; a cell holder having a plurality of insertion holes into which the other ends of the plurality of battery cells are respectively inserted, and the cell holder being mounted on the side of the frame; a heat sink mounted on the cell holder to cool the battery cells; a plurality of supports disposed in a portion of the space between the battery cells; and a filler material filling the remaining space between the battery cells where no supports are disposed. Here, the amount of filler material is adjusted according to the number of supports provided.

[0011] The support member can be formed along the flat surface shape of the space between the battery cells and extends less than the height of the internal space of the frame.

[0012] When the battery cells are arranged in one direction, the resulting group can be arranged such that the battery cells are arranged in rows in a direction perpendicular to the one direction, and each group may include the same number of battery cells.

[0013] When the battery cells are arranged in one direction, the resulting group can be arranged such that the battery cells are alternately arranged in a direction perpendicular to said one direction, and the support member can have a shape in which the periphery of the flat surface of said support member has three sides.

[0014] Each of the sides of the periphery of the flat surface of the support member may have one of a curved shape and a straight shape.

[0015] The cell holder can be configured as multiple, and multiple cell holders can be stacked in the vertical direction.

[0016] According to another exemplary embodiment, a method for manufacturing a battery pack includes: storing one end of a battery cell in an internal space of a frame; installing a plurality of supports in a portion of the space between the battery cells; installing a cell holder on one side of the frame and inserting the other ends of the plurality of battery cells protruding outside the frame into insertion holes formed in the cell holder; and injecting a filler material into the remaining space between the battery cells where the supports are not installed.

[0017] Here, the step of installing the plurality of support members includes setting the number of support members to adjust the filling amount of the filling material.

[0018] The step of setting the number of support members includes installing the support members to occupy more than 10% and less than 40% of the volume of the entire space between the battery cells.

[0019] The step of installing the cell holder on one side of the frame may include stacking multiple cell holders in the vertical direction and attaching the cell holders to the frame.

[0020] The filler material may include silicon.

[0021] Technical effect

[0022] According to an exemplary embodiment, battery cells can be supported by installing multiple support members in the space between battery cells. Therefore, although the amount of filler material used to fix the battery cells is reduced, the battery cells can be stably supported. Thus, the efficiency of the battery pack manufacturing process can be improved by reducing the amount of filler material used. Attached Figure Description

[0023] Figure 1 This is a perspective view of a battery pack according to an exemplary embodiment;

[0024] Figure 2 This is an exploded perspective view showing the structure of a battery pack according to an exemplary embodiment;

[0025] Figure 3 This is a plan view showing the mounting structure of the support member according to an exemplary embodiment; and

[0026] Figure 4 This is a flowchart illustrating a method for manufacturing a battery pack according to an exemplary embodiment. Detailed Implementation

[0027] In the following detailed description, specific embodiments will be described with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art. In the drawings, for clarity, the dimensions of layers and regions have been enlarged, and the same reference numerals consistently denote the same elements.

[0028] Figure 1 This is a perspective view showing a battery pack according to an exemplary embodiment. Figure 2 This is an exploded perspective view showing the structure of a battery pack according to an exemplary embodiment, and Figure 3 This is a plan view showing the mounting structure of the support member according to an exemplary embodiment. The battery pack according to an exemplary embodiment will be described below.

[0029] The battery pack according to the exemplary embodiment is a device for supplying power to electronic devices or systems. (See also...) Figure 1 and Figure 2 The battery pack 100 includes a frame 110, battery cells 120, cell retainers 150, a heat sink 140, filling material 130, and a support member 170.

[0030] The battery cell 120 may have a cylindrical shape. For example, the battery cell 120 may be a secondary battery cell and includes a positive current collector, a negative current collector, a separator, an active material, and an electrolyte. The battery cell 120 may be repeatedly charged and discharged through the electrochemical reactions of its components.

[0031] Here, multiple battery cells 120 can be provided. The battery cells 120 can be spaced apart from each other at predetermined locations. The battery cells 120 can be connected in series or in parallel. Therefore, the battery pack 100 can increase the output voltage or output current.

[0032] Furthermore, each battery cell 120 may have one end (or upper end) disposed within the interior space of the frame 110 and another end (or lower end) protruding to the outside of one side (or lower side) of the frame 110. That is, the battery cell 120 may have a length greater than the length of the frame 110 extending in one direction (or vertical direction).

[0033] The frame 110 may have a cavity shape. For example, the frame 110 may have a cuboid box shape. Therefore, the frame 110 may have an internal space for accommodating the battery cell 120.

[0034] Here, the frame 110 may have an opening on one side (or the bottom). For example, an opening may be formed when the entire bottom side of the frame 110 is opened. Thus, the battery cell 120 can enter the interior of the frame 110 through the opening. Since the vertical length of each battery cell 120 is greater than the length of the frame 110, the bottom end of each battery cell 120 can pass through the opening and protrude from the bottom side of the frame 110.

[0035] Furthermore, multiple through holes A can be defined in the other side (or top surface) of the frame 110. For example, each through hole A can have a circular shape and be arranged in an a×b configuration. Terminals located at the upper end of the battery cell 120 can be inserted into the through holes A. Therefore, when the terminals of the battery cell 120 are respectively inserted into different through holes A, the battery cell 120 can be arranged in an a×b configuration based on an array of through holes A.

[0036] Here, the terminals of the battery cell 120 can be inserted into the through hole A and exposed to the outside of the frame 110. A busbar 160 can be mounted on the frame 110 and connected to the terminals. For example, multiple busbars 160 can extend in one direction (or the front-to-back direction) and be arranged such that the multiple busbars 160 are spaced apart from each other in another direction (or the left-to-right direction). Therefore, battery cells 120 spaced apart from each other in one direction can be electrically connected to each other through the busbars 160. However, the exemplary embodiment is not limited to the number of busbars 160 and the structure for electrically connecting the battery cells 120. For example, the number of busbars 160 and the structure for electrically connecting the battery cells 120 can be provided differently.

[0037] Furthermore, the frame 110 may have an open surface (or front surface). Therefore, the filler material 130 can be injected into the interior space of the frame 110 through the open front surface. However, exemplary embodiments are not limited to the structure and shape of the frame 110. For example, the frame 110 may have various structures and shapes.

[0038] The cell holder 150 may be plate-shaped. For example, the cell holder 150 may have a rectangular shape along the flat surface of the frame 110, and the area of ​​the top surface of the cell holder 150 may be equal to or greater than the area of ​​the flat surface of the frame 110. Therefore, when the cell holder 150 is mounted such that the periphery of the top surface of the cell holder 150 contacts one side end of the frame 110, the cell holder 150 can cover the entire cross-section (or lower part) of the interior space of the frame 110. Thus, the lower opening formed in the frame 110 can be sealed by the cell holder 150.

[0039] Here, the material of the cell holder 150 may include plastic. Therefore, the cell holder 150 can be manufactured at a lower cost than the filler material 130 made of silicon.

[0040] Furthermore, multiple insertion holes B can be defined within the cell holder 150. Each insertion hole B can be formed along the peripheral shape of the battery cell 120, and the inner diameter of the insertion hole B can be equal to or greater than the outer diameter of the battery cell 120. Therefore, the other end of the battery cell 120 can pass through and be inserted into the insertion hole B respectively.

[0041] Here, the insertion holes B can each face the through holes A of the frame 110. That is, the insertion holes B can be arranged in an a×b pattern based on the array of through holes A. Therefore, the battery cell 120 can have an upper end inserted into and supported by the through hole A and a lower end inserted into and supported by the insertion holes B. Thus, the battery cell 120 can maintain a stable fixed state.

[0042] Furthermore, multiple cell holders 150 can be provided. The cell holders 150 can be stacked on top of each other between the frame 110 and the heat sink 140. For example, when a first cell holder 150a and a second cell holder 150b are provided, the cell holders 150 can be stacked vertically and disposed in the space between the frame 110 and the heat sink 140. Therefore, the top surface of the first cell holder 150a can be connected to the lower part of the frame 110, and the bottom surface of the second cell holder 150b can be connected to the heat sink 140. However, the exemplary embodiment is not limited to the number of cell holders 150. For example, three or more cell holders can be provided instead of two.

[0043] Here, the cell retainer 150 can support the battery cell 120 together with the filler material 130. That is, the filler material 130 supports the periphery of one end (or upper end) of each battery cell 120, and each cell retainer 150 supports the periphery of the other end (or lower end) of each battery cell 120 except for the upper end. Since the filler material 130 is not filled in the space where the cell retainers 150 are provided, the portion supported by the filler material 130 can decrease as the portion supported by the cell retainers 150 in the battery cell 120 increases. Therefore, the volume of the internal space of the frame 110 and the amount of filler material 130 filling the internal space of the frame 110 can be adjusted according to the number of stacked cell retainers 150.

[0044] For example, when the number of provided cell holders 150 increases, the volume of the internal space of the frame 110 can decrease, and when the number of provided cell holders 150 decreases, the volume of the internal space of the frame 110 can increase. Therefore, when the volume of the internal space of the frame 110 decreases, the amount of filler material 130 filling the internal space of the frame 110 can decrease, and when the volume of the internal space of the frame 110 increases, the amount of filler material 130 filling the internal space of the frame 110 can increase. Therefore, the amount of filler material 130 used can be reduced by adjusting the stacking number or height of the cell holders 150.

[0045] The heat sink 140 can be disposed below the cell holder 150. Therefore, the heat sink 140 can directly or indirectly contact the battery cell 120 inserted into the cell holder 150 to cool the battery cell 120. The heat sink 140 may include a cooling member 141, a cooling medium supply member 142, and a cooling medium discharge member 143.

[0046] The cooling member 141 may have a plate shape. For example, the cooling member 141 may have a rectangular shape along the flat surface shape of the cell holder 150, and the area of ​​the top surface of the cooling member 141 may be equal to or greater than the area of ​​the flat surface of the cell holder 150. Therefore, the top surface of the cooling member 141 may directly or indirectly contact all the battery cells 120.

[0047] Furthermore, a flow path through which the cooling medium moves can be formed in the cooling member 141. For example, the cooling medium can be a coolant. Therefore, the cooling medium moving along the flow path formed in the cooling member 141 can absorb the heat generated from the battery cell 120. Thus, the battery cell 120 can be cooled when its temperature is reduced by the cooling medium.

[0048] Here, the cooling component 141 can be made of a material with high thermal conductivity. For example, the cooling component 141 can be made of aluminum or an aluminum alloy. Therefore, the cooling component 141 can easily transfer heat generated from the battery cell 120 to the cooling medium. Thus, the temperature of the battery cell 120 can be quickly regulated.

[0049] Cooling medium supply member 142 may be connected to cooling member 141. For example, cooling medium supply member 142 may be a pipeline for supplying cooling medium to cooling member 141 and connected to one end of a flow path formed in cooling member 141. Therefore, cooling medium supplied to one end of the flow path through cooling medium supply member 142 can absorb heat from battery cell 120 as it passes through the flow path.

[0050] A cooling medium discharge member 143 may be connected to the cooling member 141. For example, the cooling medium discharge member 143 may be a pipeline for discharging the cooling medium from the cooling member 141 and connected to the other end of a flow path formed in the cooling member 141. Therefore, the cooling medium can move from one end of the flow path to the other and be discharged to the outside through the cooling medium discharge member 143. However, the exemplary embodiments are not limited to the structure and shape of the radiator 140. For example, the radiator may have various structures and shapes.

[0051] The filler material 130 can be supplied to the interior space of the frame 110 and filled in the space between the battery cells 120. Since the support member 170 is pre-installed in the space between the battery cells 120, the filler material 130 can fill the remaining space between the battery cells 120 where the support member 170 is not located. Therefore, the filler material 130 can hold the upper part of the battery cell 120 together with the support member 170.

[0052] Furthermore, the material of the filler 130 may include silicon. Therefore, the filler 130 can simultaneously possess thermal conductivity and adhesive properties. Thus, the filler 130 can be readily formed along the shape of the space between the battery cells 120 to secure the battery cells 120 and transfer heat generated from the battery cells 120 to the outside.

[0053] Here, providing filler material 130 to the entire space between battery cells 120 could be time-consuming and costly. Therefore, the amount of filler material 130 used can be reduced by including cell retainer 150 and support member 170.

[0054] The support member 170 can be disposed in a portion of the space between the plurality of battery cells 120. Since the filler material 130 also fills the space between the battery cells 120, the volume of the space filled by the filler material 130 can be adjusted according to the number of support members 170 provided, and the amount of filler material 130 to be injected can also be adjusted. That is, when the number of support members 170 provided increases, the empty space between the battery cells 120 can be reduced, and the volume of the space filled by the filler material 130 can be reduced. When the number of support members 170 provided decreases, the empty space between the battery cells 120 can be increased, and the volume of the space filled by the filler material 130 can be increased.

[0055] For example, such as Figure 1 and Figure 2 As shown, four support members 170 can be arranged in a row along the left-right direction and disposed between the battery cells 120 in the first and second columns. Therefore, when the space between the battery cells 120 in the first and second columns is filled by the support members 170, the filling material 130 only fills the spaces between the battery cells 120 in the remaining columns, except for the space between the first and second columns. Therefore, the amount of filling material 130 used can be reduced. However, the exemplary embodiment is not limited to the number or arrangement of the support members 170 provided. For example, the support members 170 can have various structures and be provided in various numbers.

[0056] Furthermore, each support member 170 may have a strip extending in the vertical direction. The support member 170 may extend less than the height of the internal space of the frame 110. For example, the support member 170 may be mounted on the top surface of the frame 110 and extend downward therefrom or upward from the top surface of the cell holder 150. Alternatively, the support member 170 may have an upper end connected to the top surface of the frame 110 and a lower end connected to the top surface of the cell holder 150. Thus, the support member 170 may be disposed within the internal space of the frame 110.

[0057] Here, the flat surface of the support 170 can be formed along the shape of the flat surface of the space between the battery cells 120. The flat surface area of ​​the support 170 can be equal to or less than the surface area of ​​the space between the battery cells 120. When the flat surface area of ​​the support 170 is equal to the flat surface area of ​​the space between the battery cells 120, the support 170 can directly contact the battery cells 120; and when the flat surface area of ​​the support 170 is less than the flat surface area of ​​the space between the battery cells 120, the support 170 can indirectly contact the battery cells 120. Therefore, the support 170 can be stably disposed in the empty space between the battery cells 120.

[0058] For example, such as Figure 3 As shown in (a), the battery cells 120 can be arranged in one direction (or front-to-back direction) to form a group. Multiple groups can be provided, and the multiple groups can be arranged such that the battery cells 120 are arranged in a row in a direction perpendicular to one direction (or left-to-right direction). Each group can include the same number of battery cells 120. Here, the support 170 can have a rectangular shape, with four sides around its flat surface. Since the battery cells 120 are arranged in the same line along both the front-to-back and left-to-right directions, a space can be formed surrounded by four battery cells 120 arranged in a rectangular shape, and the support 170 can be provided at each space surrounded by different battery cells 120. Therefore, the four sides of the support 170 can face different battery cells 120. Thus, the sides of the support 170 can directly or indirectly contact the different facing battery cells 120, and one support 170 can support four battery cells 120.

[0059] Or, such as Figure 3 As shown in (b), the battery cells 120 can be arranged in one direction (or front-to-back direction) to form a group. Multiple groups can be configured, and multiple groups can be arranged such that the battery cells 120 are alternately arranged in a direction perpendicular to one direction (or left-to-right direction). Here, the support member 170 can have a triangular shape, with three sides around the perimeter of its flat surface. Since the battery cells 120 are arranged on the same line along the front-to-back direction and alternately arranged in the left-to-right direction, a space can be formed surrounded by three battery cells 120 arranged in a triangular shape, and the support member 170 can be provided at each space surrounded by different battery cells 120. Therefore, the three sides of the support member 170 can face different battery cells 120. Thus, the sides of the support member 170 can directly or indirectly contact the different facing battery cells 120, and one support member 170 can support three battery cells 120.

[0060] Here, each side of the support 170, which forms the periphery of the flat surface of the support 170, can have at least one of a curved shape and a straight shape. When each side of the support 170 has a straight shape, the support 170 can be easily manufactured. When each side of the support 170 has a curved shape, the sides of the support 170 can form the periphery of the support 170, such that the sides respectively surround a portion of the facing battery cell 120. Therefore, the support 170 can more stably support the battery cell 120.

[0061] As described above, the battery cells 120 can be supported by installing multiple support members 170 in a portion of the space between the battery cells 120. Therefore, although the amount of filler material 130 used to fix the battery cells 120 is reduced, the battery cells 120 can be stably supported. Thus, the efficiency of the process for manufacturing the battery pack 100 can be improved by reducing the amount of filler material 130 used.

[0062] Figure 4 This is a flowchart illustrating a method for manufacturing a battery pack according to an exemplary embodiment. Hereinafter, a method for manufacturing a battery pack according to an exemplary embodiment will be described.

[0063] The method for manufacturing a battery pack according to an exemplary embodiment relates to a method for stably fixing the battery pack and reducing the amount of filler material used. Reference Figure 4 The method for manufacturing a battery pack includes: a process S110 of storing one end of a battery cell in the internal space of a frame; a process S120 of installing a plurality of supports in a portion of the space between the battery cells; a process S130 of installing a cell retainer on one side of the frame and inserting the other end of the battery cell protruding outside the frame into an insertion hole formed in the cell retainer; and a process S140 of injecting filler material into the remaining space between the battery cells where no supports are installed.

[0064] Reference Figures 1 to 3 In process S110, one end (upper end) of each battery cell 120 can be stored in the internal space of the frame 110. That is, the battery cell 120 can enter the internal space of the frame 110 through one side (or the lower side) of the opening of the frame 110, and the terminals of the battery cell 120 can be respectively inserted into the through hole A defined in the other side (or top surface) of the frame 110. Therefore, the battery cell 120 can be aligned along the arrangement shape of the through hole A.

[0065] Here, each battery cell 120 may have a vertical length greater than the vertical length of the frame 110. Therefore, the battery cell 120 may have one end disposed in the interior space of the frame 110 and the other end (or lower end) protruding downward and disposed outside the frame 110.

[0066] In process S120, multiple supports 170 can be installed in a portion of the space between the battery cells. The supports 170 can be mounted on the top surface of the frame 110 and extend downward therefrom or upward from the top surface of the cell holder 150. Alternatively, the supports 170 can have an upper end connected to the top surface of the frame 110 and a lower end connected to the top surface of the cell holder 150. Therefore, the supports 170 can be disposed within the internal space of the frame 110.

[0067] Since the filler material 130 is also filled in the space between the battery cells 120, the volume of the space filled by the filler material 130 can be adjusted according to the number of provided supports 170, and the amount of filler material 130 to be filled can also be adjusted. That is, when the number of provided supports 170 increases, the empty space between the battery cells 120 can be reduced, and the volume of the space filled by the filler material 130 can be reduced. When the number of provided supports 170 decreases, the empty space between the battery cells 120 can be increased, and the volume of the space filled by the filler material 130 can be increased.

[0068] For example, four support members 170 can be arranged in a row along the left-right direction and positioned between the first and second columns of battery cells 120. Therefore, when the space between the first and second columns of battery cells 120 is filled by the support members 170, the filling material 130 is only filled between the battery cells 120 in the remaining columns, excluding the space between the first and second columns. This reduces the amount of filling material 130 used.

[0069] Here, when setting the number of provided support members 170, the support members 170 can be set to occupy more than 10% and less than 40% of the volume of the entire space between the battery cells 120. When the support members 170 occupy less than 10% of the volume of the entire space between the battery cells 120, the amount of filling material may be slightly reduced, and filling the filling material 130 may require a significant amount of time and cost, as in the prior art. When the support members 170 occupy more than 40% of the volume of the entire space between the battery cells 120, the amount of filling material 130 used may be greatly reduced, and the filling material 130 may not stably support the battery cells 120. Therefore, the number of support members 170 can be determined to occupy more than 10% and less than 40% of the volume of the entire space between the battery cells 120, such that the filling material 130 stably supports the battery cells 120 while reducing the amount of filling material 130 used.

[0070] Subsequently, in process S130, multiple cell holders 150 can be installed on one side of the frame 110. Therefore, the other end (or lower end) of the battery cell 120 protruding outside the frame 110 can be inserted into the insertion hole B formed in the cell holder 150. Thus, when one end of the battery cell 120 is disposed in the frame 110 and the other end is supported by the cell holder 150, the battery cell 120 can be stably fixed in place.

[0071] Furthermore, multiple cell holders 150 can be provided. Therefore, when a cell holder 150 is mounted on one side of the frame 110, the cell holder 150 can be connected to the lower part of the frame 110, and the cell holders 150 can be stacked vertically. When the cell holders 150 are stacked, the insertion holes B formed in the cell holders 150 can communicate with each other to have an increased vertical length. Therefore, a portion of the battery cells 120 inserted into the interconnected insertion holes B can be increased, and a portion of the battery cells 120 disposed in the internal space of the frame 110 can be reduced. Therefore, the volume of the internal space of the frame 110 can be reduced by decreasing the vertical length of the frame 110 based on the number of cell holders 150 provided.

[0072] For example, when the number of provided cell holders 150 increases, the volume of the internal space of the frame 110 can decrease, and when the number of provided cell holders 150 decreases, the volume of the internal space of the frame 110 can increase. Therefore, when the volume of the internal space of the frame 110 decreases, the amount of filler material 130 filling the internal space of the frame 110 can decrease, and when the volume of the internal space of the frame 110 increases, the amount of filler material 130 filling the internal space of the frame 110 can increase. Therefore, the amount of filler material 130 used can be adjusted by setting the number or height of the stacked cell holders 150.

[0073] Subsequently, filler material 130 can be injected into the remaining space between battery cells 120 where the support 170 is not installed. Therefore, filler material 130 can be supplied between battery cells 120 to hold the upper end of battery cells 120.

[0074] Here, the volume of the internal space of the frame 110 is reduced by the cell holder 150, and the support 170 is pre-installed in the internal space of the frame 110. Therefore, the amount of filler material 130 supplied to fill the empty space between the battery cells 120 can be reduced twice by reducing the volume of the empty space between the battery cells 120. When the amount of filler material 130 used is reduced, the time and cost required for filling material 130 can be reduced. That is, since the filler material 130 is not filled in the space where the cell holder 150 is stacked and the space where the support 170 is installed, the amount of filler material 130 used can be adjusted according to the number of stacked cell holders 150 set according to the design specifications of the battery pack 100 or according to the number of provided support 170.

[0075] Furthermore, when a gap exists between the battery cell 120 and the support member 170, the filler material 130 can surround the periphery of both the support member 170 and the battery cell 120 when the filler material 130 is injected. Therefore, the filler material 130 can directly or indirectly contact the battery cell 120. Thus, despite the gap between the battery cell 120 and the support member 170, the support member 170 can still support the battery cell 120.

[0076] Here, the material of the filler 130 may include silicon. Therefore, although filling the space between the battery cells with the filler 130 requires significant time and cost, the amount of filler 130 used can be reduced by including the cell holder 150 and support 170 as described above. Thus, the efficiency of the process for manufacturing the battery pack 100 can be improved.

[0077] Although preferred embodiments of the invention have been described in the detailed description of the implementation methods, various changes and modifications may be made thereto without departing from the scope and spirit of the invention as defined by the appended claims. Therefore, the scope of the invention is not defined by the detailed description of the invention, but by the appended claims, and all differences within the scope shall be construed as included in the invention.

Claims

1. A battery pack comprising: a frame having an inner space and an open side; a plurality of battery cells each having one end disposed in the inner space of the frame and the other end protruding to the outside of the one side of the frame; a cell holder having a plurality of insertion holes into which the other ends of the plurality of battery cells are respectively inserted, and mounted on the one side of the frame; a heat sink mounted on the cell holder to cool the battery cells; a plurality of supports disposed in a part of the space between the battery cells; and a filler material filled in the remaining space between the battery cells which is not disposed with the supports; wherein the amount of the filler material is adjusted according to the number of the disposed supports, and wherein the cell holder is provided as a plurality of cell holders, and the plurality of cell holders are stacked in a vertical direction. The support is formed along a flat surface shape of the space between the battery cells, and extends less than the height of the inner space of the frame.

2. The battery pack of claim 1, wherein, The groups formed when the battery cells are arranged in one direction are arranged such that the battery cells are arranged in rows in a direction crossing perpendicularly to the one direction, and each group includes the same number of battery cells, and 3. The battery pack of claim 2, wherein, wherein the periphery of the flat surface of the support is formed by four sides. The groups formed when the battery cells are arranged in one direction are arranged such that the battery cells are alternately arranged in a direction crossing perpendicularly to the one direction, and 4. The battery pack of claim 2, wherein, The support has a shape in which the periphery of the flat surface of the support has three sides. Each of the sides of the periphery of the flat surface of the support has one of a curved shape and a straight line shape.

5. The battery pack according to claim 3 or 4, wherein 6.A method for manufacturing a battery pack, the method comprising the steps of: storing one ends of a plurality of battery cells in an inner space of a frame; mounting a plurality of supports in a part of the space between the plurality of battery cells; mounting a cell holder on one side of the frame and inserting the other ends of the plurality of battery cells protruding to the outside of the frame into insertion holes formed in the cell holder, respectively; and injecting a filler material into the remaining space between the battery cells which is not mounted with the supports; wherein the step of mounting the plurality of supports includes setting the number of the disposed supports to adjust the amount of the filler material, and wherein the cell holder is provided as a plurality of cell holders, and the plurality of cell holders are stacked in a vertical direction. The step of setting the number of the disposed supports includes mounting the supports to occupy more than 10% to less than 40% of the volume of the entire space between the battery cells.

7. The method of claim 6, wherein, The step of mounting the cell holder at one side of the frame includes stacking a plurality of cell holders in a vertical direction and coupling the cell holders to the frame.

8. The method of claim 6 or 7, wherein, The material of the filler material includes silicon.

9. The method of claim 8, wherein, ​

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