Battery cell and battery pack comprising the same

Abstract

A battery cell according to an embodiment of the present invention includes: an electrode assembly in which a first electrode, a second electrode, and a separator located between the first electrode and the second electrode are sequentially stacked multiple times; a battery case that houses the electrode assembly and extends along the longitudinal direction of the electrode assembly; at least two degassing holes formed on the outer surface of the battery case; and a covering portion that covers each of the at least two degassing holes, wherein the battery case is a prismatic box, and the degassing holes are covered by the covering portion after the pressure inside the battery case becomes lower than atmospheric pressure when the degassing holes are open.

Description

Technical Field

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2024-0096542, filed on July 22, 2024, and Korean Patent Application No. 10-2025-0088460, filed on July 2, 2025, the disclosures of which are incorporated herein by reference in their entirety.

[0003] This disclosure relates to a battery cell and a battery pack including the battery cell, and more specifically, to a battery cell configured such that at least two degassing vents are formed in the battery case, and a battery pack including the battery cell. Background Technology

[0004] Secondary batteries, highly adaptable to various products and exhibiting excellent electrical characteristics such as high energy density, are widely used not only in portable devices but also in electric vehicles or hybrid electric vehicles powered by electric sources. These secondary batteries are attracting widespread attention as a new energy source for improving environmental friendliness and energy efficiency because they offer the significant advantage of reducing fossil fuel consumption and do not generate byproducts from energy use.

[0005] Currently, commercially available batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among these, lithium-ion batteries are becoming increasingly popular because, compared to nickel-based batteries, they are not affected by the memory effect and can therefore be freely charged / discharged, have a low self-discharge rate, and possess high energy density.

[0006] Generally, based on the shape of the outer casing, lithium secondary batteries can be classified into cylindrical or prismatic secondary batteries manufactured by mounting the electrode assembly in a metal can, and pouch-type secondary batteries manufactured by mounting the electrode assembly in a bag made of aluminum laminate.

[0007] At this point, the lithium-ion battery undergoes an activation process involving multiple charge-discharge cycles while the electrode assembly is housed within the battery case. During this activation process, a significant amount of gas may be generated inside the lithium-ion battery. Typically, in the case of a pouch cell battery, a degassing process is performed to release the gas generated inside the battery case to the outside after the activation process. Through the degassing process, the gas inside the lithium-ion battery can be discharged to the outside.

[0008] However, traditional prismatic batteries lack a degassing process, making it impossible to release the gas inside the battery to the outside. This gas generation contributes to the degradation of the battery's long-term lifespan. Therefore, there is a need to develop structures capable of performing the degassing process on prismatic batteries. Summary of the Invention

[0009] Technical issues

[0010] The purpose of this disclosure is to provide a battery cell and a battery pack including the battery cell, the battery cell being configured such that at least two degassing vents are formed in the battery compartment.

[0011] The purpose of this disclosure is not limited to the above-described purposes, and those skilled in the art will clearly understand other purposes not described herein based on the following detailed description and accompanying drawings.

[0012] Technical solution

[0013] According to one aspect of this disclosure, a battery cell is provided, the battery cell comprising: an electrode assembly in which a first electrode, a second electrode, and a spacer inserted between the first electrode and the second electrode are sequentially stacked multiple times; a battery case housing the electrode assembly and extending along the longitudinal direction of the electrode assembly; at least two venting holes formed on the outer surface of the battery case; and a covering portion covering each of the at least two venting holes, wherein the battery case is a prismatic box, and wherein the venting holes are covered by the covering portion after the pressure inside the battery case becomes below atmospheric pressure when the venting holes are open.

[0014] At least two venting holes can be respectively located adjacent to the two side surfaces of the battery box.

[0015] The battery cell includes a pair of electrode terminals that are electrically connected to a first electrode and a second electrode, respectively, wherein the pair of electrode terminals may protrude toward the outside of the battery case.

[0016] In a pair of electrode terminals, one of the at least two degassing holes may be located adjacent to the electrode terminal electrically connected to the first electrode, and the other of the at least two degassing holes may be located adjacent to the electrode terminal electrically connected to the second electrode.

[0017] Based on the longitudinal direction of the electrode assembly, a pair of electrode terminals can extend in opposite directions, a pair of electrode terminals can protrude from two ends of the battery box toward the outside of the battery box, and at least two venting holes can be respectively provided at two ends of the battery box.

[0018] At least two degassing holes can be respectively located at separate positions on the upper part of a pair of electrode terminals.

[0019] A pair of electrode terminals may protrude from the upper part of the battery box toward the outside of the battery box, and at least two venting holes may be respectively provided on the upper part of the battery box.

[0020] At least two degassing holes may be respectively provided at two separate positions on two ends of the upper part of the battery box, wherein a pair of electrode terminals are inserted between the at least two degassing holes.

[0021] At least two degassing holes and the covering portion can be welded and joined together.

[0022] Prismatic boxes can be made from can-shaped boxes.

[0023] According to another aspect of this disclosure, a battery pack including the aforementioned battery cells is provided.

[0024] Beneficial effects

[0025] According to a specific embodiment, the battery cell and battery pack including the battery cell of the present disclosure have a structure in which at least two degassing pores are formed in the battery case, thereby allowing the gas generated in the battery cell during the activation process to be discharged to the outside of the battery cell.

[0026] In addition, the battery cell and battery pack including the battery cell of this disclosure are configured such that the pressure inside the battery box is lower than atmospheric pressure, and the degassing pores are partially covered, thereby minimizing the occurrence of lithium plating inside the battery cell.

[0027] The effects of this disclosure are not limited to those mentioned above, and those skilled in the art will clearly understand, based on the detailed description and accompanying drawings, any additional effects not described above. Attached Figure Description

[0028] Figure 1 This is a perspective view of a battery cell according to an embodiment of the present disclosure.

[0029] Figure 2 This is an exploded perspective view of a prism box, showing the omitted parts. Figure 1 The structure of the electrode assembly included in the battery cell.

[0030] Figure 3 The illustration includes Figure 1 A top view of the electrode assembly in a battery cell.

[0031] Figure 4 This is a perspective view of a battery cell according to another embodiment of the present disclosure.

[0032] Figure 5 This is an exploded perspective view of a prism box, showing the omitted parts. Figure 4 The structure of the electrode assembly included in the battery cell. Detailed Implementation

[0033] In the following, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, enabling those skilled in the art to readily implement these embodiments. The present disclosure can be modified in various different ways and is not limited to the embodiments set forth herein.

[0034] For clarity in describing this disclosure, descriptions of parts unrelated to this disclosure will be omitted, and throughout the description, the same or similar parts will be indicated by the same reference numerals.

[0035] Because the accompanying drawings arbitrarily illustrate the dimensions and thicknesses of each component for ease of description, this disclosure is not necessarily limited to the dimensions and thicknesses illustrated. The drawings depict thicknesses at an enlarged scale to clearly show different layers and regions. Furthermore, the drawings exaggerate the thickness of a particular layer or region for ease of description.

[0036] Throughout this text, unless otherwise defined, when a part “includes” a component, it does not indicate that the part excludes other components, but rather that the part may also include other components.

[0037] Throughout this text, the term "in plan view" refers to an object viewed from above, and the term "in cross-section view" refers to a vertical cross-section of an object viewed from the side.

[0038] The battery cell 100 according to an embodiment of the present disclosure will now be described.

[0039] Figure 1 This is a perspective view of a battery cell according to an embodiment of the present disclosure. Figure 2 This is an exploded perspective view of a prism box, showing the omitted parts. Figure 1 The structure of the electrode assembly included in the battery cell. Figure 3 The illustration includes Figure 1 A top view of the electrode assembly in a battery cell.

[0040] Reference Figures 1 to 3According to an embodiment of the present disclosure, the battery cell 100 includes: an electrode assembly 170 in which a first electrode 140, a second electrode 150, and a spacer 160 inserted between the first electrode 140 and the second electrode 150 are sequentially stacked multiple times; and a battery case 110, which houses the electrode assembly 170 and extends along the longitudinal direction of the electrode assembly 170. Here, the battery case 110 can accommodate the electrode assembly 170 and an internal electrolyte solution.

[0041] Reference Figures 1 to 3 The battery box 110 may be a prismatic box with a hexahedral shape and a space capable of accommodating the electrode assembly 170. In other words, the battery box 110 may be a prismatic box made of a can-shaped box. As an example, the battery box 110 may be made of a heat-resistant metal such as aluminum (Al), nickel (Ni), iron (Fe), titanium (Ti), chromium (Cr), or tungsten. As another example, the battery box 110 may be made of a heat-resistant metal such as aluminum (Al), nickel (Ni), iron (Fe), titanium (Ti), chromium (Cr), or tungsten, and the inner and / or outer surfaces of the battery box 110 may be treated with an insulating coating.

[0042] More specifically, the battery case 110 may include a main body case 111 and side surface cases 115, the main body case 111 being open at both ends in the longitudinal direction based on the electrode assembly 170, and the side surface cases 115 covering both ends of the battery case 110. However, the shape of the battery case 110 is not limited to this, and it can be included in this embodiment as long as the battery case 110 has a structure that can easily accommodate the electrode assembly 170 internally.

[0043] As an example, the portions of the main body box 111 and the side surface box 115 that abut against each other can be fastened by methods such as welding, and the interior of the battery box 110 can be sealed relative to the external environment. However, the method is not limited to this, and any method of assembly that can seal the interior of the battery box 110 can be included in this embodiment.

[0044] Reference Figure 3 The electrode assembly 170 can be a stacked electrode assembly in which a first electrode 140, a second electrode 150, and a spacer 160 inserted between the first electrode 140 and the second electrode 150 are alternately stacked. However, the electrode assembly is not limited to this and can also be a stacked folded electrode assembly having the following structure: the first electrode 140 and the second electrode 150 are stacked, wherein the spacer 160 is inserted between the first electrode 140 and the second electrode 150 and is folded to wrap around the first electrode 140 and / or the second electrode 150.

[0045] Reference Figure 3 The first electrode 140 may include a first electrode current collector 141 and a first electrode active material layer 145 formed on the upper and lower surfaces of the first electrode current collector 141, and the second electrode 150 may include a second electrode current collector 151 and a second electrode active material layer 155 formed on the upper and lower surfaces of the second electrode current collector 151.

[0046] Here, the first electrode 140 can be a positive electrode, and the second electrode 150 can be a negative electrode. If the first electrode 140 is a positive electrode, then the first electrode current collector 141 can correspond to a positive electrode current collector, and the first electrode active material layer 145 can correspond to a positive electrode active material layer. Conversely, if the second electrode 150 is a negative electrode, then the second electrode current collector 151 can correspond to a negative electrode current collector, and the second electrode active material layer 155 can correspond to a negative electrode active material layer. However, this is not a limitation; the opposite situation may also be included in this embodiment.

[0047] The first electrode 140 may include a first electrode tab 141t, and the second electrode 150 may include a second electrode tab 151t. More specifically, the first electrode tab 141t is a region on the upper and lower surfaces of the first electrode current collector 141 where the first electrode active material layer 145 is not formed, and may be located at one end of the first electrode current collector 141. The second electrode tab 151t is a region on the upper and lower surfaces of the second electrode current collector 151 where the second electrode active material layer 155 is not formed, and may be located at one end of the second electrode current collector 151.

[0048] Therefore, the battery cell 100 according to this embodiment includes an electrode assembly 170 in which a first electrode 140, a second electrode 150 and a separator inserted between the first electrode 140 and the second electrode 150 are stacked sequentially multiple times, thereby providing the following advantages: more parallel connections can be made between the electrodes, resistance can be effectively reduced, and the space utilization and battery capacity inside the battery box 110 can be further improved.

[0049] However, the shape of the electrode assembly 170 incorporated into the battery cell 100 according to this embodiment is not limited to this, and in this embodiment, a box with a wound electrode assembly may also be included, in which the first electrode sheet, the second electrode sheet and the separator sheet are wound up with the separator sheet disposed between the first electrode sheet and the second electrode sheet.

[0050] Reference Figures 1 to 3According to this embodiment, the battery cell 100 includes a pair of electrode terminals 120 electrically connected to a first electrode 140 and a second electrode 150, respectively, and the pair of electrode terminals 120 can protrude outwards from the battery case 110. As an example, if the first electrode 140 is a positive electrode, one of the electrode terminals 120 can be the positive terminal, and if the second electrode 150 is a negative electrode, the other electrode terminal 120 can be the negative terminal. However, this is not a limitation, and the opposite may also be included in this embodiment.

[0051] More specifically, one electrode terminal of the pair of electrode terminals 120 can be electrically connected to the first electrode tab 141t of the first electrode 140, and the other electrode terminal of the pair of electrode terminals 120 can be electrically connected to the second electrode tab 151t of the second electrode 150. As an example, one electrode terminal of the pair of electrode terminals 120 can be soldered to the first electrode tab 141t and the second electrode tab 151t, respectively.

[0052] Reference Figure 1 Based on the longitudinal direction of the electrode assembly 170, a pair of electrode terminals 120 extend in opposite directions, and the pair of electrode terminals 120 protrude outward from the two ends of the battery box 110.

[0053] Here, the two ends of the battery box 110 may refer to the two side surfaces of the battery box 110 positioned in the longitudinal direction based on the electrode assembly 170. In other words, the two ends of the battery box 110 may refer to the side surface box 115.

[0054] In addition, a pair of electrode terminals 120 protruding outward toward the battery compartment 110 can each be electrically connected to electrical components outside the battery cell 100.

[0055] Therefore, the battery cell 100 according to this embodiment has a structure in which a pair of electrode terminals 120 protrude in two directions, thereby simplifying the assembly process and components for forming an electrical connection structure between the electrode tabs 131t, 151t and the electrode terminals 310, 350.

[0056] Reference Figure 1 and Figure 2 The battery case 110 may have terminal insertion holes 115h formed at its two ends. Here, the two ends of the battery case 110 may refer to the side surface case 115. The terminal insertion holes 115h may be formed at one end of one pair of electrode terminals 120 of the battery case 110 and at the other end of the other pair of electrode terminals 120 of the battery case 110.

[0057] Here, each of the pair of electrode terminals 120 can pass through the terminal insertion hole 115h and protrude to the outside of the side surface housing 115. At this time, individual washers (not shown) can be respectively disposed between the pair of electrode terminals 120 and the terminal insertion hole 115h.

[0058] Therefore, the battery cell 100 according to this embodiment can prevent contact between the side surface box 115 of the battery box 110 corresponding to the metal member and the pair of electrode terminals 120, and can further enhance the insulation between the side surface box 115 of the battery box 110 and the pair of electrode terminals 120.

[0059] Reference Figure 1 and Figure 2 According to this embodiment, the battery cell 100 includes at least two degassing holes 130h formed on the outer surface of the battery case 110 and a covering portion 130 covering each of the at least two degassing holes 130h.

[0060] More specifically, the degassing pore 130h and the covering portion 130 can have corresponding shapes. For example, as shown... Figure 1 and Figure 2 As shown, the degassing hole 130h and the covering portion 130 can have a circular shape. However, the shape is not limited to this, and any shape that allows for easy venting of gas inside the battery cell 100 while easily sealing the battery cell 100 can be included in this embodiment.

[0061] As an example, the degassing hole 130h and the covering portion 130 can be welded together. More specifically, the space between the degassing hole 130h and the covering portion 130 is sealed by welding, so that the covering portion 130 can be completely embedded in the degassing hole 130h.

[0062] Therefore, in the battery cell 100 according to this embodiment, since the degassing hole 130h and the covering portion 130 are welded and bonded together, the bond between the degassing hole 130h and the covering portion 130 will not break even under pressures exceeding 5 bar. In other words, even if the pressure inside the battery cell 100 increases, the covering portion 130 can prevent the interior of the battery cell 100 from being exposed to the atmosphere, and also prevent the interior of the battery cell 100 from deteriorating due to contact with the atmosphere.

[0063] As another example, the cover portion 130 can be made of a strip material covering the degassing hole 130h or polypropylene resin (PP resin). More specifically, the space between the degassing hole 130h and the cover portion 130 can be sealed, and the cover portion 130 can be removed as needed for the process, and then the degassing hole 130h can be resealed.

[0064] Therefore, in the battery cell 100 according to this embodiment, since the covering portion 130 is made of tape material or polypropylene resin (PP resin), the degassing hole 130h can be opened and closed according to process requirements. That is, when the degassing hole 130h is open, the electrolyte solution can be injected or degassed through the degassing hole 130h. When the degassing hole 130h is closed, an activation process can be performed, thereby providing the advantage that the degassing hole 130h can be recycled in the degraded battery cell 100.

[0065] In the battery cell 100 according to this embodiment, after the pressure inside the battery case 110 is reduced to below atmospheric pressure when the vent 130h is open, the vent 130h is covered by the covering portion 130. In other words, when the vent 130h is open, gas inside the battery cell 100 can be discharged to the outside of the battery cell 100 through the vent 130h. Then, after the gas inside the battery cell 100 has been sufficiently discharged, the pressure inside the battery cell 100 can be adjusted to a negative pressure state below atmospheric pressure, and the vent 130h can be covered by the covering portion 130 when the battery cell 100 is under negative pressure.

[0066] Therefore, in the battery cell 100 according to this embodiment, the gas generated inside the battery cell 100 during the activation process can be easily discharged to the outside of the battery cell 100 through the degassing pore 130h.

[0067] In addition, the interior of the battery cell 100 can be kept under negative pressure, which can prevent the small amount of gas generated during charging and discharging after activation from being trapped inside the electrode assembly 170, and can also prevent lithium plating that may occur around the trapped gas.

[0068] In other words, when the inside of the battery cell 100 is under negative pressure, the gas generated inside the electrode assembly 170 can be released to the outside of the electrode assembly 170 due to the pressure difference, thereby minimizing the gas trapped inside the electrode assembly 170 and effectively preventing lithium plating.

[0069] At least two venting holes 130h can be provided at positions adjacent to the two side surfaces of the battery box 110. More specifically, at least two venting holes 130h are respectively provided at the two ends of the battery box 110. In other words, at least two venting holes 130h can be respectively provided on the side surface box 115 of the battery box 110. However, this embodiment is not limited to such... Figure 1 and Figure 2 The at least two degassing holes 130h shown includes the case of two degassing holes 130h. (Compared to...) Figure 1 and Figure 2In contrast, this embodiment may also include providing two or more degassing holes 130h at positions adjacent to the two side surfaces of the battery box 110.

[0070] As an example, such as Figure 1 and Figure 2 As shown, in a pair of electrode terminals 120, one of the at least two degassing holes 130h can be located adjacent to the electrode terminal electrically connected to the first electrode 140, and the other of the two degassing holes can be located adjacent to the electrode terminal electrically connected to the second electrode 150. Here, the at least two degassing holes 130h can be located at mutually separated positions on the upper portion of the pair of electrode terminals 120. In other words, the at least two degassing holes 130h can be located at positions that avoid each electrode terminal in the pair of electrode terminals 120 while preventing leakage of the electrolyte contained within the battery cell 100, and can be located on the upper portion of the pair of electrode terminals 120 in the side surface box 115 of the battery case 110.

[0071] Therefore, in the battery cell 100 according to this embodiment, since at least two degassing holes 130h are provided on the two side surfaces of the battery box 110, the gas inside the battery cell 100 can be discharged in two directions.

[0072] In addition, in the battery cell 100 where the electrode terminals 120 are respectively provided on the two ends of the electrode assembly 170, at least two degassing holes 130h are provided along the longitudinal direction of the electrode assembly 170, thereby providing the advantage of maintaining the negative pressure in the battery cell 100 more uniformly.

[0073] Furthermore, since the battery cell 100 according to this embodiment includes an electrode assembly 170 having a stacked structure in which a first electrode 140, a second electrode 150 and a separator are stacked multiple times, the gas generated from the electrode assembly 170 can be released in various directions rather than in a specific direction, and the gas inside the battery cell 100 can be easily discharged through at least two degassing holes 130h formed on the two side surfaces of the battery case 110.

[0074] Figure 4 This is a perspective view of a battery cell according to another embodiment of the present disclosure. Figure 5 This is an exploded perspective view of a prism box, showing the omitted parts. Figure 4 The structure of the electrode assembly included in the battery cell.

[0075] Reference Figure 4 and Figure 5 It can be used with Figures 1 to 3The battery cell 200 according to this embodiment will be described in a manner substantially the same as that shown in the previously described battery cell 100, and will only be further described in a manner consistent with the above description. Figures 1 to 3 The battery cell 100 describes different parts.

[0076] Reference Figure 4 and Figure 5 A pair of electrode terminals 220 protrude from the upper portion of the battery case 210 toward the outside of the battery case 210, and at least two venting holes 230h are respectively provided in the upper portion of the battery case 210. More specifically, the at least two venting holes 230h are located between the pair of electrode terminals 220, and can be respectively provided at two separate positions at two ends of the upper portion of the battery case 210.

[0077] Therefore, in the battery cell 200 according to this embodiment, at least two degassing holes 130h are provided on both sides of the upper surface of the battery case 210, thereby effectively preventing the leakage of electrolyte solution inside the battery cell 200 while discharging gas inside the battery cell 200 in two directions.

[0078] In addition, in the battery cell 100 (not shown), where a pair of electrode terminals 220 are provided at each of the two ends of the electrode assembly, at least two degassing holes 230h are provided along the longitudinal direction of the electrode assembly 170, thereby providing the advantage of more uniformly bearing the negative pressure in the battery cell 200.

[0079] Furthermore, since the battery cell 100 according to this embodiment includes an electrode assembly 170 having a laminated structure in which a first electrode 140, a second electrode 150 and a separator are stacked multiple times, the gas generated from the electrode assembly 170 can be released in different directions rather than in a specific direction, and the gas inside the battery cell 100 can be easily discharged through at least two degassing holes 130h provided on both sides of the upper surface of the battery case 110.

[0080] A battery pack according to another embodiment of this disclosure may include the aforementioned battery cells. Furthermore, a battery pack according to this embodiment can be formed by directly encapsulating one or more of the aforementioned battery cells in a battery pack housing, or by manufacturing the battery cells into battery module units and then encapsulating the battery module units in a battery pack housing.

[0081] As previously mentioned, battery packs can be applied to a variety of devices. Specifically, such devices can be applied to transportation vehicles such as electric bicycles, electric vehicles, and hybrid electric vehicles. However, this disclosure is not limited thereto and can be applied to a variety of devices capable of using battery packs, which also fall within the scope of this disclosure.

[0082] Although preferred embodiments of the present disclosure have been shown and described above, the scope of the present disclosure is not limited thereto, and those skilled in the art can make many other changes and modifications to the embodiments using the basic principles of the invention as defined in the appended claims, which also fall within the spirit and scope of the invention.

[0083] Description of reference numerals in the attached figures

[0084] 100, 200: Battery cells

[0085] 110, 210: Battery box

[0086] 111, 211: Main box

[0087] 115, 215: Side surface box

[0088] 115h, 211h: Electrode terminal holes

[0089] 120, 220: Electrode terminals

[0090] 130, 230: Coverage area

[0091] 130h, 230h: Degassing pores

[0092] 140: First electrode

[0093] 150: Second electrode

[0094] 160: Separator

[0095] 170: Electrode assembly

Claims

1. A battery cell, comprising: An electrode assembly in which a first electrode, a second electrode, and a separator inserted between the first electrode and the second electrode are stacked sequentially multiple times. A battery case that houses the electrode assembly and extends along the longitudinal direction of the electrode assembly; At least two degassing holes are formed on the outer surface of the battery box; as well as The covering portion covers each of the at least two degassing holes. The battery box is a prismatic box, and When the pressure inside the battery box drops below atmospheric pressure while the degassing vent is open, the degassing vent is covered by the covering portion.

2. The battery cell according to claim 1, wherein The at least two degassing holes are respectively located adjacent to the two side surfaces of the battery box.

3. The battery cell according to claim 1, It includes a pair of electrode terminals, which are electrically connected to the first electrode and the second electrode, respectively. wherein The pair of electrode terminals protrude outwards from the battery compartment.

4. The battery cell according to claim 3, wherein In the pair of electrode terminals, One of the at least two degassing holes is located adjacent to the electrode terminal electrically connected to the first electrode, and Another of the at least two degassing holes is located adjacent to the electrode terminal electrically connected to the second electrode.

5. The battery cell according to claim 2, wherein: Based on the longitudinal direction of the electrode assembly, the pair of electrode terminals extend in opposite directions. The pair of electrode terminals protrude from both ends of the battery case toward the outside of the battery case, and The at least two degassing holes are respectively located at the two ends of the battery box.

6. The battery cell according to claim 5, wherein The at least two degassing holes are respectively located at mutually separated positions on the upper portion of the pair of electrode terminals.

7. The battery cell according to claim 2, in, The pair of electrode terminals protrude from the upper portion of the battery compartment toward the outside of the battery compartment, and The at least two degassing holes are respectively provided on the upper part of the battery box.

8. The battery cell according to claim 7, in, The at least two degassing holes are respectively disposed at two separate positions on two ends of the upper portion of the battery box, wherein a pair of electrode terminals are inserted between the at least two degassing holes.

9. The battery cell according to claim 1, in, The at least two degassing holes and the covering portion are welded and joined together.

10. The battery cell according to claim 1, in, The prism-shaped box is made from a can-shaped box.

11. A battery pack comprising the battery cell according to claim 1.

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