Battery pack and manufacturing method therefor

Abstract

An embodiment of the present invention comprises the steps in which: both side surfaces of a battery cell stack are covered with side beams, the stack having a plurality of battery cells stacked therein; gripper pins are inserted into holes of the side beams; the gripper pins press the battery cell stack; the gripper pins load the battery cell stack; and the gripper pins unload the battery cell stack in a pack frame.

Description

Battery pack and method of manufacturing the same

[0001] Cross-citation with related application(s)

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0153339 filed November 1, 2024, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0003] The present 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 in which a battery cell stack is stably fixed and assembled using a gripper pin and a side beam.

[0004] In modern society, as the use of portable devices such as mobile phones, laptops, camcorders, and digital cameras has become commonplace, the development of technologies related to such mobile devices is becoming active. Furthermore, rechargeable secondary batteries are being utilized as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) as a solution to address air pollution caused by conventional gasoline vehicles using fossil fuels; consequently, the need for the development of secondary batteries is increasing.

[0005] Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density.

[0006] These lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative active materials, respectively. The lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and a battery case that seals and houses the electrode assembly together with an electrolyte.

[0007] Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet.

[0008] In the case of secondary batteries used in small devices, 2 to 3 battery cells are arranged, whereas in the case of secondary batteries used in medium to large devices such as automobiles, a battery pack in which multiple battery cells are electrically connected is used. In such battery packs, capacity and output are improved by connecting multiple battery cells in series or parallel to form a stack of battery cells. In addition, the battery pack can be mounted together with various control and protection systems, such as a Battery Disconnect Unit (BDU), a Battery Management System (BMS), and a cooling system, to form a battery system.

[0009] During the assembly process of the battery cell stack, there is a possibility that the positions of the cells may become misaligned due to minute positional shifts or external impacts, which can negatively affect the performance and lifespan of the battery pack. In particular, if pressure is not evenly distributed between the cells or if the cells are deformed due to external vibrations or shocks, the cooling performance and electrical connectivity of the battery pack may deteriorate.

[0010] Therefore, there is a need for technology that ensures the assembly stability of battery packs, minimizes positional variations between battery cells, and improves cooling performance. Against this backdrop, a technology has been developed that uses gripper pins and side beams to secure battery cell stacks and prevent positional variations that may occur during the assembly process.

[0011] The problem that the present invention aims to solve is to minimize positional variation of the battery cell stack during the battery pack assembly process and to prevent deformation of the battery cells caused by external impact or vibration. Specifically, the invention provides a method for manufacturing a battery pack that can improve assembly stability and cooling performance by stably fixing the battery cell stack using gripper pins and side beams and preventing displacement of the battery cells that may occur during the assembly process.

[0012] However, the problems that the embodiments of the present invention aim to solve are not limited to the problems described above and can be expanded in various ways within the scope of the technical ideas included in the present invention.

[0013] According to one embodiment of the present invention, the method comprises: a step in which a side beam covers both sides of a battery cell stack in which a plurality of battery cells are stacked; a step in which a gripper pin is inserted into a hole of the side beam; a step in which the gripper pin presses the battery cell stack; a step in which the gripper pin loads the battery cell stack; and a step in which the gripper pin unloads the battery cell stack into a pack frame.

[0014] The above gripper pin may have a square cross-section.

[0015] The gripper pin can be inserted into the side beam up to more than half the length of the battery cell in the direction in which the gripper pin is inserted into the side beam.

[0016] The above gripper pins may be multiple.

[0017] The above side beam can cover both sides of the battery cell stack.

[0018] The above gripper pin can be inserted into the hole of the side beam in a vertical direction.

[0019] The above gripper pin can be inserted from the upper to the lower direction of the side beam.

[0020] The hole of the above side beam may have a taper shape.

[0021] The above gripper pin may include an automatic locking structure that automatically locks when inserted into the side beam to a certain depth or more.

[0022] According to another embodiment of the present invention, a battery pack manufactured by the battery pack manufacturing method is provided.

[0023] According to embodiments of the present invention, by stably fixing a battery cell stack using gripper pins and side beams, positional variation of the battery cells can be minimized during the battery pack assembly process. This prevents deformation of the battery cells that may occur due to external shock or vibration and improves the structural stability of the battery pack.

[0024] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims.

[0025] FIG. 1 is a perspective view showing the step of a side beam covering both sides of a battery cell stack according to one embodiment of the present invention.

[0026] FIG. 2 is a perspective view showing the step of inserting a gripper pin into a hole in a side beam.

[0027] Figure 3 is a plan view showing the step of inserting a gripper pin into a hole in a side beam.

[0028] FIG. 4 is a perspective view showing the gripper pin inserted into the hole of the side beam.

[0029] Figure 5 is a plan view showing Figure 4 viewed from a different angle.

[0030] Figure 6 is a plan view showing Figure 4 viewed from a different angle than Figure 5.

[0031] FIG. 7 is a perspective cross-sectional view showing a cross-section cut along the cutting line A-A' of FIG. 5.

[0032] Figure 8 is a cross-sectional view showing a cross-section cut along the cutting line A-A' of Figure 5.

[0033] FIG. 9 is a cross-sectional view showing a battery cell stack, a side beam, and a gripper pin according to another embodiment of the present invention.

[0034] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0035] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0036] Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings.

[0037] Furthermore, when a part such as a layer, membrane, region, or plate is said to be "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when a part is said to be "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" facing the opposite direction of gravity.

[0038] Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0039] Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side.

[0040] FIG. 1 is a perspective view showing the step of a side beam (130) according to an embodiment of the present invention covering both sides of a battery cell stack (120). FIG. 2 is a perspective view showing the step of a gripper pin (140) being inserted into a hole (131) of the side beam (130). FIG. 3 is a plan view showing the step of a gripper pin (140) being inserted into a hole (131) of the side beam (130). FIG. 4 is a perspective view showing the gripper pin (140) inserted into the hole (131) of the side beam (130). FIG. 5 is a plan view showing FIG. 4 viewed from a different angle. FIG. 6 is a plan view showing FIG. 4 viewed from a different angle than FIG. 5. FIG. 7 is a perspective cross-sectional view showing a cross-section cut along the cutting line A-A' of FIG. 5. FIG. 8 is a cross-sectional view showing a cross-section cut along the cutting line A-A' of FIG. 5.

[0041] One embodiment of the present invention may include: a step in which a side beam (130) covers both sides of a battery cell stack (120) in which a plurality of battery cells (110) are stacked; a step in which a gripper pin (140) is inserted into a hole (131) of the side beam (130); a step in which the gripper pin (140) presses the battery cell stack (120); a step in which the gripper pin (140) loads the battery cell stack (120); and a step in which the gripper pin (140) unloads the battery cell stack (120) into a pack frame.

[0042] The battery cell (110) according to the present embodiment may be of various forms, for example, a pouch-type battery cell, a prismatic battery cell, or a cylindrical battery cell. The battery cell (110) according to the present embodiment may be a pouch-type battery cell. Although the following description focuses on a pouch-type battery cell, the battery cell (110) according to the present embodiment is not limited thereto, and various types of battery cells may be applied. A plurality of battery cells (110) may be stacked along one direction to form a battery cell stack (120) so that they can be electrically connected to each other.

[0043] The side beam (130) according to the present embodiment can cover one side of the battery cell stack (120). The side beam (130) can press the battery cell stack (120) to prevent positional changes that may occur during the battery pack assembly process. By covering the side of the battery cell stack (120), the side beam (130) can absorb external shocks and vibrations, and can ensure that the battery cell stack (120) remains sturdy during battery pack assembly. The side beam (130) may include a material such as an aluminum alloy or high-strength plastic.

[0044] According to the present embodiment, a step may be included in which side beams (130) cover both sides of a battery cell stack (120) in which a plurality of battery cells (110) are stacked. Through this step, the battery cells (110) can be protected from external shocks and vibrations, and the position of the battery cell stack (120) can be stably maintained.

[0045] Next, a step may be performed in which a gripper pin (140) is inserted into a hole (131) of a side beam (130). The gripper pin (140) is inserted into a hole (131) formed in the side beam (130) to press and fix the battery cell stack (120). The gripper pin (140) engages with the hole (131) of the side beam (130) to help stably fix the battery cell stack (120) without rotation or shaking.

[0046] Next, a step in which the gripper pin (140) presses the battery cell stack (120) may be performed. This step may be a step for stably fixing the battery cell stack (120). The gripper pin (140) can uniformly press the battery cell stack (120) to maintain the spacing between the battery cells (110) and prevent deformation of the battery cells (110). Since the position of the gripper pin (140) is fixed during the pressing process, it is possible to prevent the battery cell stack (120) from moving due to external shock or vibration.

[0047] According to the present embodiment, while the gripper pin (140) is pressing the battery cell stack (120), a step of loading the battery cell stack (120) may follow. In this step, while the gripper pin (140) is pressing the battery cell stack (120), the battery cell stack (120) may be moved to a pack frame by assembly equipment or a robot arm. This process can be carried out using automated equipment, which can increase the precision of the operation and improve production speed. That is, loading using the gripper pin (140) can proceed quickly and accurately while stably maintaining the battery cell stack (120), thereby contributing to increased productivity.

[0048] Finally, according to the present embodiment, a step of unloading the battery cell stack (120) onto the pack frame by the gripper pin (140) may be performed. Through this step, the gripper pin (140) can place the battery cell stack (120) onto the pack frame. During the unloading process, the battery cell stack (120) can be stably fixed to the pack frame as the gripper pin (140) is released.

[0049] As a result, by providing a structure that allows the battery cell stack (120) to be stably pressed, loaded, and unloaded using a gripper pin (140), positional variation of the battery cell stack (120) can be minimized and the stability of the assembly process can be improved. This allows for a reduction in assembly time and cost in the battery pack manufacturing process and an improvement in productivity.

[0050] Referring again to FIGS. 1 to 8, the gripper pin (140) may have a square cross-section.

[0051] The square-shaped gripper pin (140) according to the present embodiment can engage with a hole (131) formed in the side beam (130). The square-shaped gripper pin (140) can provide a more stable structure than the conventional circular gripper pin (140). In particular, when the gripper pin (140) is inserted into the hole (131), it can be stably fixed without rotation or shaking, thereby allowing the battery cell stack (120) to be uniformly pressed.

[0052] When the square cross-section gripper pin (140) is inserted into the hole (131), the clearance between the gripper pin (140) and the hole (131) is minimized, thereby preventing minute shaking or rotation that may occur during pressure application. Accordingly, the position of the battery cell stack (120) can be maintained more accurately, and in particular, positional changes of the battery cells (110) can be minimized even during the process of moving or unloading the battery cell stack (120). In addition, since the square cross-section structure widens the contact area between the gripper pin (140) and the hole (131), the pressure applied to the battery cell stack (120) can be distributed more evenly. This can contribute to preventing deformation of the battery cell stack (120) and, in particular, can improve the quality of the battery cell (110) by minimizing external damage to the battery cell (110).

[0053] If the cross-section of the gripper pin (140) is designed to be square, the frictional force between the side of the gripper pin (140) and the wall of the hole (131) of the side beam (130) can be increased. This increase in frictional force can increase the fixing force when inserting the gripper pin (140), allowing the battery cell stack (120) to be stably pressed, and can reduce minute positional fluctuations that may occur during the assembly process. In addition, the square cross-sectional structure has higher mechanical strength compared to a circular gripper pin (140), so the gripper pin (140) can be maintained firmly without deformation even while applying higher pressure to the battery cell stack (120).

[0054] FIG. 9 is a cross-sectional view showing a battery cell stack (120), a side beam (130), and a gripper pin (140) according to another embodiment of the present invention.

[0055] Referring to FIGS. 1 to 5 and FIG. 9, the gripper pin (140) can be inserted into the side beam (130) up to more than half the length of the battery cell (110) in the direction in which the gripper pin (140) is inserted into the side beam (130).

[0056] When the gripper pin (140) according to the present embodiment is inserted more than half the length of the battery cell (110), pressure can be transmitted over a wider area when the gripper pin (140) presses the battery cell stack (120). This provides the effect of evenly distributing the pressure to the battery cell stack (120) and prevents the battery cell stack (120) from being deformed or moved by external shock or vibration. In addition, as the insertion depth of the gripper pin (140) increases, the fixing force increases, so the position of the battery cell stack (120) can be maintained more stably.

[0057] When the gripper pin (140) is deeply inserted into the side beam (130), the overall support force for the battery cell stack (120) can be improved. This can help ensure that each cell of the battery cell stack (120) is uniformly supported and fixed. In particular, when the battery cell stack (120) is loaded and unloaded into the pack frame, the gripper pin (140) can stably maintain the battery cell stack (120). That is, when the gripper pin (140) is inserted for more than half the length of the battery cell (110), the contact area between the gripper pin (140) and the side beam (130) increases, thereby further enhancing the effect of suppressing shaking or minute movement of the battery cell stack (120).

[0058] Referring again to FIGS. 1 to 8, the gripper pin (140) may be multiple.

[0059] Since the battery cell stack (120) has a structure in which a plurality of battery cells (110) are stacked, there may be limitations in stably fixing the entire battery cell stack (120) with only a single gripper pin (140). Therefore, by using multiple gripper pins (140) to provide fixing force at various points of the battery cell stack (120), pressure can be evenly distributed over the entire battery cell stack (120).

[0060] According to the present embodiment, a plurality of gripper pins (140) can be evenly distributed on the sides of the battery cell stack (120). This distribution can prevent deformation or warping of the battery cell stack (120) by individually pressing each part of the battery cell stack (120). For example, five gripper pins (140) can be placed on each side of the battery cell stack (120), so that a total of 10 gripper pins (140) can press the battery cell stack (120). By fixing multiple parts of the battery cell stack (120) simultaneously with the plurality of gripper pins (140) in this way, the battery cell stack (120) can be stably maintained.

[0061] Multiple gripper pins (140) can operate advantageously in an automated assembly process. Each gripper pin (140) can fix a specific point of the battery cell stack (120) while simultaneously being linked with automated equipment to rapidly perform loading and unloading. The multiple gripper pins (140) can operate independently or simultaneously, thereby allowing the pressing and assembly process of the battery cell stack (120) to be performed more precisely.

[0062] Referring again to FIGS. 1 to 6, the side beam (130) can cover both sides of the battery cell stack (120).

[0063] Since the battery cell stack (120) has a structure in which a plurality of battery cells (110) are stacked, there is a possibility that the position of the battery cells (110) may shift or be damaged due to minor impacts or external forces during the assembly process. To prevent this, the position of the battery cell stack (120) can be firmly fixed by adopting a structure in which the side beams (130) completely surround both sides of the battery cell stack (120).

[0064] Specifically, the side beam (130) can be manufactured to cover the entire front surface of the battery cell stack (120) from the top to the bottom. The side beam (130) is positioned on both sides of the battery cell stack (120) to help protect each battery cell (110) from external impact. Through this, external pressure or vibration can be effectively absorbed to prevent damage to the battery cell (110).

[0065] The side beam (130) can protect the battery cell stack (120) when the battery cell stack (120) is loaded or unloaded onto the pack frame, thereby preventing deformation of the spacing between the battery cells (110) and helping to prevent the position of the battery cells (110) from shifting. Through this, the assembly accuracy of the battery pack can be improved, and the battery cell stack (120) can maintain a stable structure even after assembly.

[0066] Referring again to FIGS. 1 to 8, the gripper pin (140) can be inserted into the hole (131) of the side beam (130) in a vertical direction.

[0067] Insertion of the gripper pin (140) in the vertical direction can serve to make the connection between the gripper pin (140) and the side beam (130) more robust, thereby preventing the position of the battery cell stack (120) from changing during the assembly process. This can particularly contribute to maximizing stability during the loading and unloading process of the battery cell stack (120).

[0068] Specifically, when the gripper pin (140) is inserted vertically into the hole (131) of the side beam (130), the contact area between the gripper pin (140) and the hole (131) is widened, and the fixing force on the battery cell stack (120) can be improved. The vertical insertion method can prevent shaking or rotation that may occur when the gripper pin (140) is fixed to the side beam (130), which can help provide uniform pressure when pressing the battery cell stack (120).

[0069] By inserting the gripper pin (140) vertically, uniform pressure can be applied to the battery cell stack (120). This allows each battery cell (110) of the battery cell stack (120) to be pressed with the same force. The vertical insertion method can be particularly advantageous in an automated assembly process, as the automated equipment can insert the gripper pin (140) vertically to precisely secure the battery cell stack (120), thereby maximizing the efficiency of the assembly process.

[0070] Additionally, the insertion depth of the gripper pin (140) can be adjusted by inserting the gripper pin (140) into the hole (131) of the side beam (130) in a vertical direction. That is, the gripper pin (140) can be inserted to an accurate depth as intended, according to the size or height of the battery cell stack (120). Through this, the pressure applied to the battery cell stack (120) can be controlled more accurately, and deformation of the cell caused by uneven pressure that may occur during the assembly process can be prevented.

[0071] Referring again to FIGS. 1 to 8, the gripper pin (140) can be inserted from the upper to the lower direction of the side beam (130).

[0072] Since this method aligns with the direction of gravity, it allows for accurate positioning while minimizing the force applied during insertion. Additionally, it minimizes positional errors or insertion defects that may occur during the insertion process. Through this, during the assembly process of the battery cell stack (120), the gripper pin (140) is accurately inserted into the battery cell stack (120), and the position of each battery cell (110) can be stably maintained so that it does not become misaligned.

[0073] Additionally, insertion from the top to the bottom reduces unnecessary resistance or friction during the insertion process and helps the gripper pin (140) stably press the battery cell stack (120). Specifically, the gripper pin (140) can naturally be combined with the side beam (130) during the process of insertion from the top to the bottom. In particular, the contact area between the side beam (130) and the gripper pin (140) is widened during the insertion process, thereby further enhancing the fixing force and allowing the battery cell stack (120) to be safely pressed while fixed.

[0074] This method of insertion from the top to the bottom can be more effective in an automated assembly process. An automated robot arm or assembly mechanism can accurately insert the gripper pin (140) from the top to the bottom to perform the process of fixing the battery cell stack (120) quickly and accurately. As the gripper pin (140) is inserted in the downward direction, each battery cell (110) is uniformly pressed, preventing the battery cell stack (120) from being deformed or damaged. In addition, since the gripper pin (140) naturally moves downward due to gravity when inserted, there is less need to use additional devices or force, thereby increasing the efficiency of the manufacturing process.

[0075] The hole (131) of the side beam (130) may have a tapered shape.

[0076] The tapered hole (131) has a structure that gradually narrows from top to bottom, allowing the gripper pin (140) to be inserted into the correct position. The tapered shape reduces frictional resistance that may occur during insertion and allows the gripper pin (140) to naturally align with the hole (131) of the side beam (130).

[0077] The tapered hole (131) can provide the effect of automatically centering the gripper pin (140) when it is inserted into the hole (131). Even if the gripper pin (140) does not engage precisely with the hole (131) of the side beam (130), the tapered hole (131) can induce the gripper pin (140) to naturally align to the center as it is inserted downward. This prevents the gripper pin (140) from being inserted abnormally or the insertion angle from being distorted. As a result, the gripper pin (140) is accurately inserted into the hole (131) of the side beam (130) and can stably press the battery cell stack (120).

[0078] The tapered hole (131) may have a structure in which the diameter gradually narrows from the top to the bottom. When the gripper pin (140) is inserted into the tapered hole (131), insertion begins from the top and as it goes down, the gripper pin (140) gradually aligns with the center of the hole (131). Through this, the gripper pin (140) can be perfectly inserted into the side beam (130), and the contact area between the gripper pin (140) and the side beam (130) is widened, thereby strengthening the fixing force.

[0079] Additionally, the tapered hole (131) can be effective in reducing insertion errors that may occur when inserting the gripper pin (140). In particular, even if the gripper pin (140) is inserted quickly in an automated assembly process, the tapered shape can ensure that the gripper pin (140) is naturally aligned without becoming twisted. This increases assembly accuracy in the battery pack assembly process and minimizes problems that may occur due to abnormal insertion of the gripper pin (140).

[0080] The gripper pin (140) may include an automatic locking structure that automatically locks when inserted into the side beam (130) to a certain depth or more.

[0081] The automatic locking structure may include a mechanism that automatically locks the gripper pin (140) when it is inserted to a certain depth. This allows the gripper pin (140) to be fixed in the correct position without any additional fixing device or procedure during the assembly process, thereby contributing to the stable fixing of the battery cell stack (120).

[0082] The automatic locking structure allows the gripper pin (140) to be automatically locked by an internal spring or cam mechanism after being inserted into the side beam (130) to a certain depth. For example, when the gripper pin (140) is inserted into the hole (131) of the side beam (130) to a certain depth, the spring may unfold internally or the cam may rotate to secure the gripper pin (140). This automatic locking structure allows the gripper pin (140) to be automatically secured to the side beam (130) without the user having to manually secure the gripper pin (140) separately, thereby greatly improving work convenience. Additionally, since the automatic locking mechanism operates simultaneously with insertion, it can prevent insertion errors or the gripper pin (140) from coming loose during the assembly process.

[0083] The automatic locking structure can be designed to operate only when the gripper pin (140) is inserted to a certain depth or more. This can help prevent problems that may occur when the gripper pin (140) is unstable in its fixation. If the gripper pin (140) is not inserted to a sufficient depth into the side beam (130), the locking mechanism does not operate, so it is easy to check whether accurate insertion has been made during the assembly process. Additionally, when removing the gripper pin (140) as needed, the locking can be released by pressing or rotating a spring, making maintenance and disassembly work easy.

[0084] The automatic locking structure can improve assembly speed and reduce worker errors, thereby increasing reliability in the assembly process. This technology can maximize the efficiency of the assembly process even in mass production environments and provide the effect of simultaneously improving the quality and productivity of the battery pack manufacturing process.

[0085] According to another embodiment of the present invention, a battery pack manufactured by a battery pack manufacturing method is provided.

[0086] Battery packs can be applied to various devices. Specifically, they can be applied to means of transportation such as electric bicycles, electric vehicles, and hybrids, but are not limited to these; they can be applied to various devices capable of using secondary batteries.

[0087] In this embodiment, terms indicating directions such as front, back, left, right, up, and down have been used; however, these terms are for convenience of explanation only and may vary depending on the location of the object or the observer.

[0088] Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention.

[0089] Explanation of the symbols

[0090] 110: Battery cell

[0091] 120: Battery cell laminate

[0092] 130: Side beam

[0093] 131: Hall

[0094] 140: Gripper pin

Claims

1. A step in which side beams cover both sides of a battery cell stack in which multiple battery cells are stacked; A step of inserting a gripper pin into a hole of the side beam; A step in which the above gripper pin presses the above battery cell stack; The step of the above gripper pin loading the battery cell stack; and A method for manufacturing a battery pack, comprising the step of unloading the battery cell stack onto a pack frame using the gripper pin.

2. In Paragraph 1, A method for manufacturing a battery pack, wherein the above-mentioned gripper pin has a square cross-section.

3. In Paragraph 1, A method for manufacturing a battery pack, wherein the gripper pin is inserted into the side beam up to more than half the length of the battery cell in the direction in which the gripper pin is inserted into the side beam.

4. In Paragraph 1, The above gripper pin is a multiple individual battery pack manufacturing method.

5. In Paragraph 1, A method for manufacturing a battery pack in which the above-mentioned side beams cover both sides of a battery cell stack.

6. A method for manufacturing a battery pack according to claim 1, wherein the gripper pin is inserted into the hole of the side beam in a vertical direction.

7. A method for manufacturing a battery pack according to claim 1, wherein the gripper pin is inserted from the upper to the lower direction of the side beam.

8. A method for manufacturing a battery pack according to claim 1, wherein the hole of the side beam has a tapered shape.

9. A method for manufacturing a battery pack according to claim 1, wherein the gripper pin includes an automatic locking structure that automatically locks when inserted into a side beam to a depth greater than a certain depth.

10. A battery pack manufactured by the method for manufacturing a battery pack according to paragraph 1.

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