Battery pack

Abstract

One embodiment of the present disclosure discloses a battery pack. The battery pack includes: a battery cell stack including a plurality of battery cells; a tray having a bottom portion and a side portion, and in which the battery cell stack is accommodated in an internal space formed by the bottom portion and the side portion; and at least one fixing member for fixing the battery cell stack. According to an embodiment of the present disclosure, a battery cell stack is continuously pressed in a tray accommodating the battery cell stack, thereby preventing shaking during transportation and fixing and protecting the battery cell stack.

Description

Technical Field

[0001] Cross-reference with related applications

[0002] This application claims the benefits of Korean Patent Application No. 10-2023-0036069, filed on March 20, 2023, and Korean Patent Application No. 10-2024-0037970, filed on March 19, 2024, the disclosures of which are incorporated herein by reference in their entirety.

[0003] This disclosure relates to a battery pack, and more specifically, to a battery pack for transporting multiple battery cells. Background Technology

[0004] In modern society, with the daily use of portable devices such as mobile phones, laptops, camcorders, and digital cameras, technological development in fields related to these mobile devices has been actively pursued. Furthermore, rechargeable / dischargeable secondary batteries are used as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) in an attempt to address air pollution caused by the use of fossil fuels in existing gasoline vehicles. Therefore, the demand for developing secondary batteries is growing.

[0005] Currently commercially available rechargeable batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among these, lithium-ion batteries have attracted much attention due to their advantages, such as almost no memory effect compared to nickel-based batteries, allowing for free charging and discharging, very low self-discharge rate, and high energy density.

[0006] This type of lithium secondary battery mainly uses lithium-based oxide and carbon materials as cathode and anode active materials, respectively. The lithium secondary battery includes: an electrode assembly, in which cathode and anode plates, each coated with cathode and anode active materials respectively, alternately alternate, with a separator inserted between the cathode and anode plates; and a battery casing, which seals and houses the electrode assembly and the electrolyte solution.

[0007] Generally, based on the shape of the external material, lithium secondary batteries can be classified into can batteries in which the electrode assembly is built into a metal can and pouch batteries in which the electrode assembly is built into an aluminum laminate.

[0008] In the case of secondary batteries used in small devices, two to three individual battery cells are arranged, while in the case of secondary batteries used in medium or large devices such as automobiles, battery modules in which a large number of battery cells are electrically connected are used. In such battery modules, a large number of battery cells are connected in series or parallel to form battery cell assemblies, thereby increasing capacity and output. Furthermore, more than one battery module can be installed together with various control and protection systems such as battery disconnect units (BDUs), battery management systems (BMSs), and cooling systems to form battery packs.

[0009] When configuring a battery pack, battery modules are typically configured first, and various control and protection systems, such as battery disconnect units (BDUs), battery management systems (BMS), and cooling systems, are added to these battery modules to form the battery pack. Traditional battery packs are manufactured by arranging battery modules in a housing structure, such as a battery pack tray, and these battery packs are installed in vehicles, etc. Therefore, traditionally, to manufacture a battery pack, battery modules in which the individual battery cells are housed within a module frame are transported.

[0010] Figure 1 This is a schematic diagram used to explain the traditional method of transporting battery modules.

[0011] Reference Figure 1 Traditionally, when manufacturing a battery module 10 by housing a large number of individual battery cells in a module frame, a tray 30 and a housing 20 are used for transporting the battery module 10. To protect the battery module 10, it is placed in the tray 30 and transported while still in the housing 20. However, in this conventional method, a gap exists between the tray 30 and the housing 20 for assembly, thus greatly increasing the likelihood of the battery module 10 shifting during transport. Therefore, there is a need to develop a structure that can prevent shifting during transport. Utility Model Content

[0012] Technical issues

[0013] This disclosure aims to solve the above-mentioned problems. Therefore, the purpose of this disclosure is to provide a battery pack that prevents the battery cell stack from shaking during transportation and can fix and protect the battery cell stack.

[0014] However, the technical problems to be solved by the embodiments of this disclosure are not limited to the problems described above, and various extensions can be made within the scope of the technical concepts included in this disclosure.

[0015] Technical solution

[0016] According to one embodiment of the present disclosure, a battery pack is provided, the battery pack comprising: a battery cell stack including a plurality of battery cells; a tray having a bottom and side portions, and the battery cell stack being housed in an internal space formed by the bottom and side portions; and at least one fixing member for fixing the battery cell stack.

[0017] The battery pack may also include at least one press plate, which is arranged in the internal space as a surface perpendicular to the bottom.

[0018] The fixing component can be a cam clip located between the pressing plate and the side portion.

[0019] The cam clip may include a camshaft and a cam portion connected to the camshaft, and the cam portion may rotate asymmetrically about the camshaft.

[0020] The cam portion can be circular or elliptical, and the camshaft can be connected to the cam portion in the area between the center and the outer periphery of the cam portion.

[0021] The fixing component can be a spring component located between the pressing plate and the side portion.

[0022] The spring member can be arranged such that it applies a spring force to the pressing plate.

[0023] The fixing member can be a bolt member, which passes through a through hole formed in the side portion.

[0024] The inner surface of the through hole can be threaded and connected by bolts, which can press the pressure plate.

[0025] The protective component can be located on one surface of the pressing plate facing the battery cell stack.

[0026] The fixing member can be a strip member that surrounds at least a portion of the outer surface of the battery cell stack.

[0027] The protective component can be located between the fixed component and the battery cell stack.

[0028] The battery pack may also include a processing housing, in which the battery cells and trays are housed together.

[0029] The fixing member is mounted on the processing housing or tray and can press against the sides of the battery cell stack. Pressing of the fixing member can be performed on each of the facing sides of the battery cell stack in the direction in which the sides face each other.

[0030] The fixed component can be a hinged clamp.

[0031] The processing housing may include a plurality of columns extending along the height direction and a plurality of horizontal bars extending along a horizontal direction perpendicular to the columns, and the columns and the plurality of horizontal bars may form the appearance of the processing housing.

[0032] The battery cells are pouch cells and are stacked in one direction within the battery cell stack.

[0033] Beneficial effects

[0034] According to embodiments of this disclosure, the battery cell stack is continuously pressed within a tray containing the battery cell stack, thereby preventing shaking during transport and securing and protecting the battery cell stack.

[0035] The effects available from this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the description of the appended claims other additional effects not mentioned herein. Attached Figure Description

[0036] Figure 1 This is a schematic diagram used to explain the traditional method of transporting battery modules.

[0037] Figure 2 This is a perspective view showing a stack of battery cells included in a battery pack according to an embodiment of the present disclosure.

[0038] Figure 3 It is viewed from above. Figure 2 A plan view of the battery cell stack.

[0039] Figure 4 yes Figure 2 An exploded 3D view of a battery cell stack.

[0040] Figure 5 It shows Figure 2 A 3D view of a single battery cell included in a battery cell stack.

[0041] Figure 6 This is a plan view of a battery pack according to an embodiment of the present disclosure, viewed from above.

[0042] Figure 7 (a) and Figure 7 (b) shows Figure 6 A diagram of the fixing components included in the battery pack.

[0043] Figure 8 This is a plan view of a battery pack according to another embodiment of the present disclosure, viewed from above.

[0044] Figure 9 This is a plan view of a battery pack according to another embodiment of the present disclosure, viewed from above.

[0045] Figure 10 This is a plan view of a battery pack according to another embodiment of the present disclosure, viewed from above.

[0046] Figure 11 It is along Figure 10 The cross-sectional view taken by the cutting line AA′.

[0047] Figure 12 This is a perspective view of a battery pack according to an embodiment of the present disclosure.

[0048] Figure 13 It is an enlargement and shows the application. Figure 12 A partial perspective view of the fixing components of the battery pack.

[0049] Figure 14 This is a perspective view of a battery pack according to another embodiment of the present disclosure. Detailed Implementation

[0050] In the following description, various embodiments of the present disclosure will be illustrated with reference to the accompanying drawings to enable 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.

[0051] For clarity in describing this disclosure, parts not related to the specification will be omitted, and throughout the specification, the same reference numerals denote the same elements.

[0052] Furthermore, the dimensions and thicknesses of the components are arbitrarily shown in the accompanying drawings for ease of description, and this disclosure is not necessarily limited to the dimensions and thicknesses shown in the drawings. The thicknesses of layers, regions, etc., are exaggerated in the accompanying drawings for clarity. The thicknesses of some layers and regions are exaggerated in the accompanying drawings for ease of description.

[0053] Furthermore, it should be understood that when an element, such as a layer, film, region, or plate, is referred to as being "on" or "above" another element, it may be directly on the other element, or there may be intermediate elements present. In contrast, when an element is referred to as being "directly on" another element, it means that there are no other intermediate elements present. Additionally, stating that a portion is "above" or "on" a reference portion means that the portion is located above or below the reference portion, and does not specifically mean that the portion is located "above" or "on" the reference portion in the opposite direction to gravity.

[0054] Furthermore, throughout the specification, when a part is referred to as "including" or "contains" a component, unless otherwise stated, it means that the part may also include other components, but does not exclude other components.

[0055] Furthermore, throughout the instruction manual, when referred to as a "plane," it means the view of the target portion from above, and when referred to as a "section," it means the view of the target portion from one side of a vertically cut section.

[0056] Figure 2 This is a perspective view showing a stack of battery cells included in a battery pack according to an embodiment of the present disclosure. Figure 3 It is viewed from above. Figure 2 A plan view of the battery cell stack. Figure 4 yes Figure 2 An exploded 3D view of a battery cell stack. Figure 5 It shows Figure 2 A 3D view of a single battery cell included in a battery cell stack.

[0057] Reference Figures 2 to 5 According to one embodiment of the present disclosure, a battery pack includes a battery cell stack 120, which includes a plurality of battery cells 110. A tray that houses the battery cell stack 120 and a fixing member that secures the battery cell stack will now be described.

[0058] The battery cell 110 according to this embodiment can be various types of battery cells, such as pouch cell, prismatic cell, or cylindrical cell. As an example, the battery cell 110 according to this embodiment can be as follows: Figures 2 to 5 The pouch cell shown is a soft-pack battery cell. The soft-pack battery cell will be described below; however, the battery cell 110 according to this embodiment is not limited thereto, and various types of battery cells can be applied.

[0059] According to this embodiment, the battery cell 110 can have a structure in which an electrode assembly having electrode leads 111 protruding in one or both directions is housed in a soft-pack housing 114. This battery cell 110 can have a rectangular sheet shape. The battery cell 110 can be formed by housing the electrode assembly in a soft-pack housing 114 made of a laminate including resin and metal layers, and then bonding the outer periphery of the soft-pack housing 114. As an example, the battery cell 110 can have a structure in which two electrode leads 111 face each other and protrude from one end 114a and the other end 114b of the battery cell body 113. As another example, a structure in which all electrode leads 111 of the battery cell 110 protrude in one direction is also feasible. One electrode lead 111 is a cathode lead, and the other electrode lead 111 is an anode lead.

[0060] The battery cell 110 can be manufactured by joining two ends 114a and 114b of the soft-pack housing 114 and a side portion 114c connecting the two ends, with the electrode assembly (not shown) housed within the soft-pack housing 114. In other words, the battery cell 110 according to one embodiment of this disclosure has a total of three sealing portions 114s, wherein the sealing portions have a structure sealed by, for example, welding, and the remaining side portion can be formed by a folded portion 115. That is, the battery cell 110 according to this embodiment can be a soft-pack type secondary battery in which the electrode assembly is housed inside the soft-pack housing 114 and the outer periphery of the soft-pack housing 114 is sealed to form the sealing portions 114s. Figure 5 In this paper, only the sealing part 114s is shown in the state where the sealing part 114s is formed at the two ends 114a and 114b of the soft housing 114. The sealing part is not shown on the side facing the folding part 115. However, for space utilization, the sealing part on the side facing the folding part 115 can be in the state where it is folded to one side after sealing is completed.

[0061] The flexible housing 114 of the laminate may include an inner resin layer for sealing, a metal layer for preventing material penetration, and an outermost resin layer. Based on the electrode assembly inside the flexible housing 114, the inner resin layer may be located on the innermost side, the outer resin layer may be located on the outermost side, and the metal layer may be located between the inner and outer resin layers.

[0062] The outer resin layer exhibits excellent tensile strength and weather resistance related to its thickness, and may possess electrical insulating properties to protect the electrode assembly from external influences. This outer resin layer may comprise polyethylene terephthalate (PET) resin or nylon resin. A metal layer prevents air, moisture, etc., from entering the pouch cell. This metal layer may comprise aluminum (Al). With the electrode assembly embedded, the inner resin layers can be heat-sealed together by applying heat and / or pressure. This inner resin layer may comprise cast polypropylene (CPP) or polypropylene (PP).

[0063] The pouch casing 114 is divided into two parts, with a concave casing portion for housing electrode assemblies formed in at least one of these parts. Along the outer periphery of this casing portion, the inner resin layers of the two parts of the pouch casing 114 can be joined together to provide a seal 114s. Sealing the pouch casing in this manner allows for the production of a battery cell 110 as a pouch-type secondary battery.

[0064] Within the battery cell stack 120, multiple battery cells 110 can be configured. As an example, multiple battery cells 110 can be stacked along one direction to be electrically connected to each other, thereby forming the battery cell stack 120. As an example, multiple battery cells 110 can be stacked vertically along a direction parallel to the X-axis. Thus, electrode leads 111 can protrude in a direction perpendicular to the stacking direction of the battery cells 110. In each battery cell 110, one electrode lead 111 can protrude towards the Y-axis direction, and another electrode lead 111 can protrude towards the -Y-axis direction. If the electrode leads 111 of a battery cell protrude only in one direction, the electrode leads 111 can protrude in either the Y-axis direction or the -Y-axis direction.

[0065] Additionally, the battery cell stack 120 according to this embodiment may include a busbar frame 130, which covers one surface of the battery cell stack 120 in the direction in which the electrode leads 111 protrude and the surface opposite to that surface. The busbar frame 130 may contain an electrically insulating material, and the busbar 131 or terminal busbar 132, which will be described below, contacts different portions of the battery cell 110 other than the electrode leads 111, thereby preventing short circuits.

[0066] Busbar 131, terminal busbar 132, etc., can be mounted on each busbar frame 130. Specifically, busbar 131 and terminal busbar 132 can be mounted on opposite sides of the surface of the busbar frame 130 facing the battery cell 110. Busbar 131 can be electrically connected to the electrode lead 111 of the battery cell 110. As an example, busbar 131 and electrode lead 111 can be joined by soldering. A slit is formed in the busbar frame 130, through which the electrode lead 111 can pass and connect to the busbar 131. The battery cells 110 can be electrically connected in series or parallel via the busbar 131.

[0067] Terminal busbar 132 can be electrically connected to electrode lead 111, and a portion thereof can be exposed externally. A portion of the exposed terminal busbar 132 can form a high-voltage (HV) connection with other battery cell stacks or electronic components. Here, an HV connection is used as a connection for supplying power requiring high voltage, and refers to a connection between battery cells.

[0068] Additionally, the battery cell stack 120 may also include a pad member 140. The pad member 140 may be arranged between the battery cells 110. Furthermore, the pad member 140 may be arranged on each of the two sides of the battery cell stack 120 in the direction in which the battery cells 110 are stacked. During repeated charging / discharging, the battery cells 110 may undergo internal electrolyte decomposition and generate gas, resulting in the expansion of the battery cells 110, i.e., an expansion phenomenon. In the expansion phenomenon of the battery cells 110, the battery cells 110 may expand in the direction of the stacking of the battery cells 110 (parallel to the X-axis). According to this embodiment, the pad member 140 can absorb the expansion of the battery cells 110, thereby preventing the battery cell stack 120 from deforming beyond its deformation limit due to the expansion of the battery cells 110.

[0069] Next, we will refer to Figure 6 and Figure 7 A battery pack 100a according to an embodiment of the present disclosure is described in detail.

[0070] Figure 6 This is a plan view of a battery pack according to an embodiment of the present disclosure, viewed from above. Figure 7 (a) and Figure 7 (b) shows Figure 6 A diagram of the fixing components included in the battery pack.

[0071] Reference Figure 6 and Figure 7 Together Figures 2 to 5 According to one embodiment of the present disclosure, a battery pack 100a includes: a battery cell stack 120, the battery cell stack 120 including a plurality of battery cells 110; a tray 200 having a bottom 210 and side portions 220, and the battery cell stack 120 being accommodated in an internal space formed by the bottom 210 and side portions 220; and at least one fixing member 300a for fixing the battery cell stack 120. In this disclosure, a battery pack refers to a unit for transporting a battery cell stack 120 including a plurality of battery cells 110 during the manufacture of battery packs, etc.

[0072] As described above, the tray 200 may include a bottom 210 and side portions 220, and the battery cell stack 120 is housed within the internal space formed by the bottom 210 and the side portions 220. That is, the battery cell stack 120 is disposed on the bottom 210, and the side portions 220 may cover the sides of the battery cell stack 120. The tray 200 may contain materials resistant to external impacts, such as steel, aluminum (Al), plastic, or reinforced plastic.

[0073] Furthermore, unlike the traditional method of manufacturing battery modules by housing battery cell stacks in module frames and then mounting these battery modules on the battery pack frame, simplified structures are increasingly being applied, such as cell-to-pack (CTP) structures where battery cell stacks are directly mounted on the battery pack frame. By eliminating the module frame, space utilization within the battery pack cells is increased, and overall energy density can be improved while weight is reduced. Manufacturing a battery pack with this simplified structure fundamentally requires the assembly and transport of battery cell stacks. The battery pack according to this embodiment can be configured to transport battery cell stacks, rather than battery modules.

[0074] In the battery pack according to this embodiment, since the battery cell stacks are transported instead of battery modules, a device is needed to continuously press the battery cell stacks to prevent shaking during transportation and to fix and protect the battery cell stacks. As such a device, the fixing member 300a according to this embodiment will be described.

[0075] The battery pack 100a according to this embodiment may further include at least one pressing plate 400 arranged perpendicularly to one surface of the bottom 210 in the internal space, and the fixing member 300a according to this embodiment may be a cam clip located between the pressing plate 400 and the side portion 220.

[0076] Specifically, the fixing member 300a, which serves as the cam clip, may include a camshaft 310a and a cam portion 320a connected to the camshaft 310a. The cam portion 320a may rotate asymmetrically about the camshaft 310a. As an example, the cam portion 320a may be circular or elliptical, and the camshaft 310a may be connected to the cam portion 320a in the region between the center and the outer periphery of the cam portion 320a.

[0077] In other words, in response to the asymmetrical rotation of the cam portion 320a, the pressing plate 400 can move in the direction of the battery cell stack 120 to press the battery cell stack 120, and the pressing plate 400 can move in the opposite direction to the direction of the battery cell stack 120 to ensure free space between the pressing plate 400 and the battery cell stack 120.

[0078] Based on the above structure, the process of fixing the battery cell stack 120 into the internal space of the tray 200 will be described. Figure 7 As shown in (a), the long axis of the cam portion 320a is parallel to one surface of the pressing plate 400 in the length direction to ensure space between the pressing plates 400. In this state, the battery cell stack 120 is arranged between the pressing plates 400. Subsequently, as... Figure 7As shown in (b), in order to ensure that the short axis of the cam portion 320a becomes parallel to a surface of the pressing plate 400 in the length direction, the cam portion 320a is rotated. In response to the rotation of the cam portion 320a, the pressing plate 400 presses the battery cell stack 120 and can fix the battery cell stack 120 in the internal space of the tray 200 without shaking.

[0079] Additionally, the protective member 500 may be located on one surface of the pressing plate 400 facing the battery cell stack 120. Since direct pressing of the pressing plate 400 may damage the battery cell stack 120, the protective member 500 can be positioned on this surface of the pressing plate 400. Furthermore, the protective member 500 can mitigate shaking and impact during transportation. Preferably, the protective member 500 comprises a material with compressive properties; for example, it may comprise one or more materials selected from the group consisting of expanded polypropylene (EPP), polyurethane, and silicone.

[0080] Furthermore, on each of the mutually facing sides of the battery cell stack 120, pressing of the fixing member 300a can be performed in the direction in which the sides face each other. When the pressing of the fixing member 300a in the mutually facing directions reaches equilibrium, the battery cell stack 120 can be fixed. Specifically, the battery cell stack 120 may have a first side 121, a second side 122, a third side 123, and a fourth side 124. Here, the first side 121 and the second side 122 may be the side where the pad member 140 is located, and the third side 123 and the fourth side 124 may be the side where the busbar frame 130 is located. On each of the mutually facing first side 121 and second side 122 of the battery cell stack 120, pressing of the fixing member 300a can be performed in the direction in which the first side 121 and the second side 122 face each other. On the first side 121, pressing can be performed by the fixing member 300a in the X-axis direction; on the second side 122, pressing can be performed by the fixing member 300a in the -X-axis direction.

[0081] Furthermore, on each of the third side 123 and the fourth side 124 of the battery cell stack 120, which face each other, pressing of the fixing member 300a can be performed in the direction in which the third side 123 and the fourth side 124 face each other. On the third side 123, pressing by the fixing member 300a can be performed in the Y-axis direction; on the fourth side 124, pressing by the fixing member 300a can be performed in the -Y-axis direction.

[0082] In this embodiment, pressing is performed by the fixing member 300a on each of the four sides 121, 122, 123 and 124 of the battery cell stack 120 in a direction toward each of the four sides 121, 122, 123 and 124.

[0083] Next, we will refer to Figure 8 The battery pack 100b according to another embodiment of the present disclosure will now be described in detail.

[0084] Figure 8 This is a plan view of a battery pack according to another embodiment of the present disclosure, viewed from above.

[0085] Reference Figure 8 According to another embodiment of this disclosure, the battery pack 100b may include a stack of battery cells 120, a tray 200, at least one fixing member 300b, and at least one pressing plate 400. To avoid repetition, descriptions of configurations that overlap with those previously described will be omitted.

[0086] According to this embodiment, the fixing member 300b can be a spring member located between the pressing plate 400 and the side portion 220. The fixing member 300b, as a spring member, can be arranged such that it applies a spring force to the pressing plate. Furthermore, the type and number of spring members are not particularly limited if the spring force acts towards the pressing plate. As an example, the fixing member 300b can be a coil spring or a leaf spring.

[0087] Based on the above structure, the process of fixing the battery cell stack 120 to the internal space of the tray 200 will be described. A force is applied to the pressing plate 400 to compress the fixing member 300b, which acts as a spring member, and to ensure the space between the pressing plates 400. In this state, the battery cell stack 120 is arranged between the pressing plates 400. Subsequently, when the force applied to the pressing plate 400 is removed, the pressing plate 400 presses the battery cell stack 120 by the elastic force of the fixing member 300b, and the battery cell stack 120 can be fixed in the internal space of the tray 200 without shaking.

[0088] Furthermore, on each of the facing sides of the battery cell stack 120, pressing of the fixing member 300b can be performed in the direction in which the sides face each other. When the pressure of the fixing member 300b performed in the direction in which they face each other reaches equilibrium, the battery cell stack 120 can be fixed. Specifically, on each of the facing sides 121, 122, 123, and 124 of the battery cell stack 120, pressing of the fixing member 300b can be performed in the direction in which the first side 121 and the second side 122 face each other. On the first side 121, pressing by the fixing member 300b can be performed in the X-axis direction; on the second side 122, pressing by the fixing member 300b can be performed in the -X-axis direction.

[0089] Furthermore, on each of the third side 123 and the fourth side 124 of the battery cell stack 120, which face each other, pressing of the fixing member 300b can be performed in the direction in which the third side 123 and the fourth side 124 face each other. On the third side 123, pressing by the fixing member 300b can be performed in the Y-axis direction; on the fourth side 124, pressing by the fixing member 300b can be performed in the -Y-axis direction.

[0090] In this embodiment, pressing by the fixing member 300b is preferably performed on each of the four sides 121, 122, 123 and 124 of the battery cell stack 120 in a direction toward each of the four sides 121, 122, 123 and 124.

[0091] Next, we will refer to Figure 9 The battery pack 100c according to another embodiment of the present disclosure will now be described in detail.

[0092] Figure 9 This is a plan view of a battery pack according to another embodiment of the present disclosure, viewed from above.

[0093] Reference Figure 9 According to another embodiment of this disclosure, the battery pack 100c may include a stack of battery cells 120, a tray 200, at least one fixing member 300c, and at least one pressing plate 400. To avoid repetition, descriptions of configurations that overlap with those previously described will be omitted.

[0094] According to this embodiment, the fixing member 300c can be a bolt member that passes through a through hole formed in the side portion 220. That is, the fixing member 300c, as a bolt member having threads formed on its outer surface, can be arranged to pass through the through hole. Furthermore, threads are formed on the inner surface of the through hole, and through the bolt connection of the fixing member 300c, the fixing member 300c can press against the pressing plate 400. The bolt connection refers to the process of tightening and loosening the fixing member 300c.

[0095] Based on the above structure, the process of fixing the battery cell stack 120 to the internal space of the tray 200 will be described. Loosen the fixing member 300c to ensure space between the pressing plates 400. In this state, arrange the battery cell stack 120 between the pressing plates 400. Subsequently, tighten the fixing member 300c so that the fixing member 300c presses against the pressing plates 400, and the pressing plates 400 press against the battery cell stack 120. Therefore, the battery cell stack 120 can be fixed in the internal space of the tray 200 without shaking.

[0096] Furthermore, on each of the facing sides of the battery cell stack 120, pressing of the fixing member 300c can be performed in the direction in which the sides face each other. When the pressing of the fixing member 300c in the facing direction reaches equilibrium, the battery cell stack 120 can be fixed. Specifically, on each of the facing sides 121, 122, 123, and 124 of the battery cell stack 120, pressing of the fixing member 300c can be performed in the direction in which the first side 121 and the second side 122 face each other. On the first side 121, pressing by the fixing member 300c can be performed in the X-axis direction; on the second side 122, pressing by the fixing member 300c can be performed in the -X-axis direction.

[0097] Furthermore, on each of the third side 123 and the fourth side 124 of the battery cell stack 120, which face each other, pressing of the fixing member 300c can be performed in the direction in which the third side 123 and the fourth side 124 face each other. On the third side 123, pressing by the fixing member 300c can be performed in the Y-axis direction; on the fourth side 124, pressing by the fixing member 300c can be performed in the -Y-axis direction.

[0098] In this embodiment, pressing by the fixing member 300c is preferably performed on each of the four sides 121, 122, 123 and 124 of the battery cell stack 120 in a direction toward each of the four sides 121, 122, 123 and 124.

[0099] Next, we will refer to Figure 10 and Figure 11 The battery pack 100d according to another embodiment of the present disclosure will now be described in detail.

[0100] Figure 10 This is a plan view of a battery pack according to another embodiment of the present disclosure, viewed from above. Figure 11 It is along Figure 10 The cross-sectional view taken by the cutting line A-A'.

[0101] Reference Figure 10 and Figure 11 According to another embodiment of this disclosure, the battery pack 100d may include a stack of battery cells 120, a tray 200, and at least one fixing member 300d. To avoid repetition, descriptions of configurations that overlap with those previously described will be omitted.

[0102] According to this embodiment, the fixing member 300d can be a strip member surrounding at least a portion of the outer surface of the battery cell stack 120.

[0103] Multiple fixing members 300d can be formed and can extend along the upper surface, two sides, and lower surface of the battery cell stack 120. On the upper or lower surface of the battery cell stack 120, some fixing members 300d can extend along the stacking direction of the battery cells 110, and other fixing members 300d can extend in a direction perpendicular to the stacking direction of the battery cells 110. This method is not limited, but preferably, multiple fixing members 300d surround the battery cell stack 120 in various directions to securely restrict the movement of the battery cells 110. Furthermore, as an example, fixing members 300d, as strap members, can surround the battery cell stack 120, and fixing members 300d can be secured by clamps 310d, such as... Figure 11 As shown.

[0104] Additionally, the protective member 500 may be located between the fixing member 300d and the battery cell stack 120. This protective member 500 prevents the fixing member 300d, acting as a strap member, from damaging the battery cell stack 120. Furthermore, the protective member 500 can mitigate shaking and impact during transportation. Preferably, the protective member 500 comprises a material with compressive properties; for example, it may comprise one or more materials selected from the group consisting of expanded polypropylene (EPP), polyurethane, and silicone resin.

[0105] Additionally, the blocking member 600 that restricts the movement of the battery cell stack 120 can be arranged in the space between the battery cell stack 120, which is wrapped with the conveyor component, and the side portion 220.

[0106] Based on the above structure, the process of fixing the battery cell stack 120 in the internal space of the tray 200 will be described. The battery cell stack 120 is wound around a fixing member 300d as a strap member and fixed with a clamp 310d. The battery cell stack 120 is arranged to be fixed between the blocking members 600 so that the battery cell stack 120 can be fixed in the internal space of the tray 200 without shaking.

[0107] Figure 12 This is a perspective view of a battery pack according to an embodiment of the present disclosure. Figure 13 It is an enlargement and shows the application. Figure 12 A partial perspective view of the fixing components of the battery pack.

[0108] Reference Figure 12 and Figure 1 3. The battery pack according to this embodiment may further include a processing housing 700, in which the battery cell stack 120 and the tray 200 are housed together. That is, the battery cell stack 120 can be housed in the processing housing 700 while being housed in the tray 200. At this time, multiple battery cell stacks 120 can be housed in the processing housing 700, and each battery cell stack 120 can be housed in the tray 200. As described above, the tray 200 may have a bottom 210 and a side portion 220.

[0109] The fixing member 300e can be disposed on the processing housing 700 or the tray 200 to press down on the sides of the cell stack 120. Figure 12 and Figure 1 In Figure 3, the state in which the fixing member 300e is disposed in the processing housing 700 is shown. Here, pressing the side of the battery cell stack 120 includes not only the case where the fixing member presses directly when it contacts the side of the battery cell stack 120, but also the case where an additional member or tray 200 is located between the battery cell stack 120 and the fixing member, and the fixing member presses the side of the battery cell stack 120 indirectly.

[0110] On each of the facing sides of the battery cell stack 120, pressing of the fixing member 300e can be performed in the direction in which the sides face each other. When the pressing of the fixing member 300e in the facing directions reaches equilibrium, the battery cell stack 120 can be fixed. In this embodiment, on each of the four sides of the battery cell stack 120, preferably, the pressing by the fixing member 300e is performed in the direction toward each of the four sides. When the fixing member 300e is arranged in this way in the processing housing 700, the entire battery cell stack 120 and the tray 200 can be fixed within the processing housing 700.

[0111] More specifically, the side portion 220 of the tray 200 may have a first side portion 221, a second side portion 222, a third side portion 223, and a fourth side portion 224. On each of the first side portion 221 and the second side portion 222 of the side portion 220 of the tray 200, which face each other, pressing of the fixing member 300e can be performed in a direction in which the first side portion 221 and the second side portion 222 face each other. Furthermore, on each of the third side portion 223 and the fourth side portion 224 of the side portion 220 of the tray 200, which face each other, pressing of the fixing member 300e can be performed in a direction in which the third side portion 223 and the fourth side portion 224 face each other.

[0112] The fixing member 300e according to this embodiment is not particularly limited in shape, as long as it can apply pressure in one direction. As an example, the fixing member 300e can be a hinged clip. A hinged clip utilizes the principle of levers and is a device that can apply a large amount of pressure to a desired position in one direction by manipulating the lever once with a small amount of force.

[0113] Figure 14 This is a perspective view of a battery pack according to another embodiment of the present disclosure.

[0114] Reference Figure 14 In another embodiment of this disclosure, the battery pack may further include a processing housing 700, in which the battery cell stack 120 and the tray 200 are housed together. As described above, the battery cell stack 120 may be housed in the processing housing 700 while being housed in the tray 200. Furthermore, multiple battery cell stacks 120 may be housed in the processing housing 700, and each battery cell stack 120 may be housed in the tray 200. As described above, the tray 200 may have a bottom 210 and side portions 220.

[0115] The fixing component 300e is mounted on the tray 200 and can press down on the side of the battery cell stack 120. Figure 14 The image shows the state in which the fixing member 300e is set on the tray 200.

[0116] Similar to the previously described embodiments, pressing of the fixing member 300e can be performed on each of the facing sides of the battery cell stack 120 in a direction in which the sides face each other. When the pressing of the fixing member 300e in the facing directions reaches equilibrium, the battery cell stack 120 can be secured. Furthermore, preferably, pressing by the fixing member 300e is performed on each of the four sides of the battery cell stack 120 in a direction toward each of the four sides. When the fixing member 300e is arranged on the tray 200 in this manner, each battery cell stack 120 can be secured within the tray 200.

[0117] More specifically, as described above, the battery cell stack 120 may have a first side 121, a second side 122, a third side 123, and a fourth side 124. On each of the first side 121 and the second side 122 of the battery cell stack 120 that face each other, a pressing action of the fixing member 300e can be performed in a direction in which the first side 121 and the second side 122 face each other. Furthermore, on each of the third side 123 and the fourth side 124 of the battery cell stack 120 that face each other, a pressing action of the fixing member 300e can be performed in a direction in which the third side 123 and the fourth side 124 face each other.

[0118] On the other hand, refer to Figures 12 to 14 The processing housing 700 according to this embodiment may include a plurality of pillars 710 extending along a height direction and a plurality of horizontal rods 720 extending along a horizontal direction perpendicular to the pillars 710. Here, the height direction may be a virtual direction perpendicular to the ground, and the horizontal direction may be a virtual direction perpendicular to the height direction and parallel to the ground. The pillars 710 and the horizontal rods 720 may form the appearance of the processing housing 700.

[0119] Specifically, four posts 710 can be arranged in the four vertex regions of a virtual rectangle on a plane. Horizontal rods 720 can connect these four posts 710. That is, a horizontal rod 720 can connect two adjacent posts 710. In addition, multiple horizontal rods 720 can be set to connect two posts 710, and the horizontal rods 720 connecting two posts 710 can be set at predetermined intervals along the height direction.

[0120] The pillars 710 and horizontal bars 720 form the appearance of the processing housing 700, and the stack of battery cells 120 housed in the tray 200 can be accommodated and stacked in the interior space of the processing housing 700. Here, the interior space of the processing housing 700 is the space surrounded by the pillars 710 and horizontal bars 720.

[0121] On the other hand, the processing housing 700 according to this embodiment may further include: a bottom rod 730 on which a stack of battery cells 120 housed in a tray 200 is disposed; and an inner rod 740 that divides the internal space of the processing housing 700. The bottom rod 730 on which the stack of battery cells 120 is disposed may have a similar shape to the horizontal rod 720 to form an open space between the bottom rods 730. The inner rod 740 may be configured to separate the space between the stacks of battery cells 120 arranged along the extending direction of the horizontal rod 720.

[0122] In the processing housing 700 according to this embodiment, instead of plate-like members forming the exterior, a plurality of columns 710 and horizontal bars 720 form the exterior. This minimizes the weight per unit volume of the processing housing 700 while ensuring structural rigidity. The processing housing 700 may contain materials resistant to external impacts, such as steel, aluminum (Al), plastic, or reinforced plastic.

[0123] Furthermore, the space provided between the posts 710 or the horizontal bars 720 facilitates the transport of the battery pack. In other words, the battery pack can be transported when a device for transporting the battery pack is inserted into the space between the posts 710 or the horizontal bars 720.

[0124] Furthermore, the fixing member 300e can be located in the open space between the columns 710 or between the horizontal bars 720. That is, because an open space is provided between the columns 710 or between the horizontal bars 720, the battery cell stack 120 housed in the tray 200 is accommodated in the processing housing 700, and the operation of the fixing member 300e can then be adjusted through this open space, thus making it easy to adjust the fixation of the battery cell stack 120. If the processing housing is a plate-like member, it may be difficult to adjust the operation of the fixing member after the battery cell stack 120 is housed in the processing housing 700. In particular, when the fixing member 300e is a hinged clamp, levers need to be manipulated to apply pressure for fixation. The levers of the hinged clamp can be manipulated through the open space between the columns 710 or between the horizontal bars 720.

[0125] In this embodiment, terms indicating direction, such as front, back, left, right, top, and bottom, have been used. However, the terms used are provided only for the convenience of description and may vary depending on the position of the object, the position of the observer, etc.

[0126] Although the present disclosure has been described in detail with reference to preferred embodiments thereof, the scope of the present disclosure is not limited thereto, and those skilled in the art can make various modifications and improvements using the basic concept of the present disclosure as defined in the appended claims, and such modifications and improvements also fall within the scope of the present disclosure.

[0127] [Explanation of reference numerals in the attached figures]

[0128] 100a, 100b, 100c, 100d: Battery packs

[0129] 200: Pallet

[0130] 300a, 300b, 300c, 300d: Fixed components

[0131] 400: Press plate

[0132] 500: Protective components

[0133] 600: Blocking component

Claims

1. A battery pack, characterized in that, include: A battery cell stack, wherein the battery cell stack comprises multiple battery cells; A tray having a bottom and side portions, and the stack of battery cells being housed within an internal space formed by the bottom and side portions; At least one pressing plate, the at least one pressing plate being arranged in the internal space as a surface perpendicular to the bottom; At least one fixing member, the at least one fixing member being configured to press the at least one pressing plate to fix the battery cell stack; as well as The processing housing contains the battery cell stack and the tray together.

2. The battery pack according to claim 1, characterized in that, The fixing component is a cam clip located between the pressing plate and the side portion.

3. The battery pack according to claim 2, characterized in that, The cam clip includes a camshaft and a cam portion connected to the camshaft, and The cam section rotates asymmetrically about the camshaft.

4. The battery pack according to claim 3, characterized in that, The cam portion is circular or elliptical, and The camshaft is connected to the cam portion in the area between the center and the outer periphery of the cam portion.

5. The battery pack according to claim 1, characterized in that, The fixing member is a spring member located between the pressing plate and the side portion.

6. The battery pack according to claim 5, characterized in that, The spring member is arranged such that it applies a spring force to the pressing plate.

7. The battery pack according to claim 1, characterized in that, The fixing member is a bolt member that passes through a through hole formed in the side surface.

8. The battery pack according to claim 7, characterized in that, The inner surface of the through hole is threaded and connected by bolts through the bolt member, which presses down on the pressing plate.

9. The battery pack according to claim 1, characterized in that, The protective component is located on one surface of the pressing plate facing the battery cell stack.

10. The battery pack according to claim 1, characterized in that, The fixing member is disposed on the processing housing or the tray and presses down on the side of the battery cell stack. On each of the facing sides of the battery cell stack, the pressing of the fixing member is performed in the direction in which the sides face each other.

11. The battery pack according to claim 10, characterized in that, The fixing component is a hinged clamp.

12. The battery pack according to claim 1, characterized in that, The processing housing includes a plurality of columns extending along the height direction and a plurality of horizontal rods extending along a horizontal direction perpendicular to the columns. The columns and the plurality of horizontal bars form the appearance of the processing housing.

13. The battery pack according to claim 1, characterized in that, The battery cell is a pouch cell and is stacked in one direction within the battery cell stack.

Images