Undercover, battery pack and vehicle

Abstract

The under cover according to the present application is used to support a side bottom surface of a battery cell, and includes a flat cover lower portion, and a cover upper portion facing the side bottom surface of the battery cell and having a protruding pattern protruding toward the battery cell.

Description

Technical Field

[0001] The present invention relates to a bottom cover supporting one side of the bottom surface of a battery cell, a battery pack including the bottom cover, and a vehicle. Background Technology

[0002] Unlike primary batteries, which are non-rechargeable, secondary batteries are rechargeable batteries capable of charge-discharge cycles. They are widely used not only in portable electronic devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) powered by electric power sources.

[0003] These secondary batteries are gaining attention as a new energy source for promoting environmental friendliness and energy efficiency because they not only have the major advantage of significantly reducing the use of fossil fuels, but also the advantage of not producing byproducts from energy use.

[0004] Currently widely used types of rechargeable batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of a single rechargeable battery cell (i.e., a single-cell battery) is approximately 2.5V to 4.5V. Therefore, when a higher output voltage is required, battery packs can be configured by electrically connecting multiple battery cells in series. Furthermore, depending on the charge / discharge capacity requirements, battery packs can be configured by connecting multiple battery cells in parallel. Thus, the number of battery cells included in a battery pack and the type of their electrical connections can vary depending on the required output voltage and total charge / discharge capacity.

[0005] Meanwhile, cylindrical, prismatic, and pouch-type battery cells are known as types of rechargeable battery cells. In the case of a cylindrical battery cell, an insulating separator is provided between the positive and negative electrodes, and the electrodes and separator are wound together to form a wound-core electrode assembly, which is then housed within a cylindrical battery casing to constitute the battery cell. Furthermore, a current collector can be connected to the uncoated portions of the positive and negative electrodes, and the current collector electrically connects the electrode assembly to the electrode terminals exposed to the outside of the battery. Additionally, an electrolyte capable of moving lithium ions is injected into the interior of the battery casing. Furthermore, a battery cover is attached to one side of the battery casing to prevent electrolyte leakage and separation of the electrode assembly. In this case, a sealing gasket is inserted between the battery casing and the battery cover to maintain electrical insulation between them, preventing not only electrolyte leakage but also moisture ingress.

[0006] Furthermore, cylindrical battery cells can connect the positive and negative terminals of the electrode assembly to the outside through various structures. For example, a battery cover covering one side of the bottom surface of the battery canister can be used as the positive terminal, or a separate rivet terminal can be provided on the other side of the bottom surface of the battery canister that serves as the positive terminal. In this way, even when the rivet terminal is used as the positive terminal, the battery cover exists in a non-polar form and covers one side of the bottom surface of the battery canister.

[0007] However, as described above, the bottom surface of one side of the battery can covered by the battery cap, or the bottom surface of the other side of the battery can where the rivet terminals are formed, is not formed as a flat surface, but rather has a predetermined groove. This is because the ends of the battery can are bent to secure the battery can, and the rivet terminals protrude.

[0008] Therefore, when battery cells are housed in the battery pack casing, it is difficult for the bottom of the battery cell to make close contact with the bottom of the battery pack casing, which includes the cooling plate. This may reduce the cooling efficiency of the battery cell. Summary of the Invention

[0009] Technical issues

[0010] The present invention provides a bottom cover, a battery pack and a vehicle including the bottom cover, wherein the bottom cover can stably support one bottom surface of the battery cell while improving the cooling efficiency of the battery cell.

[0011] However, the technical problem to be solved by the present invention is not limited to the above-mentioned problems. Those skilled in the art will clearly understand from the following description other problems not explicitly mentioned.

[0012] Technical solution

[0013] According to an embodiment of the present invention, a bottom cover for solving the above-mentioned problems supports one side of the bottom surface of a battery cell, and the bottom cover includes a flat lower part and an upper part, the upper part of which faces one side of the bottom surface of the battery cell, and the upper part of which has a raised pattern protruding toward the battery cell.

[0014] The bottom cover may be made of one or more materials including copper and aluminum.

[0015] Additionally, the bottom cover may be coated with epoxy resin.

[0016] Alternatively, the raised pattern may include a circle.

[0017] Meanwhile, the present invention is a battery pack, the battery pack comprising: a battery cell, wherein a groove is formed on one bottom surface of the battery housing, and the electrode assembly is accommodated in the battery housing; a battery pack housing, the battery pack housing accommodating at least one of the battery cells; and a bottom cover, the bottom cover being inserted between one bottom surface of the battery cell and the bottom of the battery pack housing to support the battery cell, and the bottom cover comprising a lower cover portion facing the bottom of the battery pack housing; and a upper cover portion facing one bottom surface of the battery cell, and the upper cover portion having a raised pattern protruding toward the battery cell.

[0018] The raised pattern formed on the upper part of the bottom cover can be inserted into at least a portion of the groove formed on one side of the bottom surface of the battery casing of the battery cell.

[0019] The lower part of the cover facing the bottom of the battery pack housing can be formed to be flat.

[0020] The bottom cover may be made of a metallic material with a thermal conductivity equal to or higher than that of the battery casing of the battery cell.

[0021] For example, the bottom cover may be made of one or more materials including copper and aluminum.

[0022] Additionally, the bottom cover may be coated with an insulating material.

[0023] For example, the bottom cover may be coated with epoxy resin.

[0024] The raised pattern formed on the upper part of the cover of the bottom cover may include a circular shape.

[0025] In addition, a cooling flow path may be formed at the bottom of the battery pack housing.

[0026] Additionally, a thermal interface material (TIM) may be inserted between the bottom of the battery pack housing and the bottom cover.

[0027] Furthermore, the present invention provides a vehicle comprising at least one battery pack according to the foregoing embodiments.

[0028] Beneficial effects

[0029] According to the present invention, the bottom surface of one side of the battery cell can be stably supported while improving the cooling efficiency of the battery cell.

[0030] However, the advantages of the present invention are not limited to those described above, and those skilled in the art will clearly understand from the following description other technical effects not explicitly mentioned. Attached Figure Description

[0031] Figure 1 This is a perspective view of the bottom cover according to one embodiment of the present invention.

[0032] Figure 2 yes Figure 1 Plan view of the bottom cover.

[0033] Figure 3 yes Figure 1 A longitudinal sectional view of the bottom cover.

[0034] Figure 4 It is shown by Figure 1 A perspective view of the battery cell supported by the bottom cover.

[0035] Figure 5 yes Figure 4 A longitudinal cross-sectional perspective view of the battery cell.

[0036] Figure 6 This is a diagram showing the state in which the bottom cover supports the battery cell according to an embodiment of the present invention.

[0037] Figure 7 This is an enlarged longitudinal cross-sectional view of a portion of a battery pack including a bottom cover according to an embodiment of the present invention.

[0038] Figure 8 It shows including Figure 7 A picture of a vehicle with a battery pack. Detailed Implementation

[0039] The advantages and features of the present invention, as well as methods of implementing them, will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various other forms. These embodiments are provided merely to ensure a complete disclosure of the invention and to fully inform those skilled in the art of its scope. The invention is defined only by the scope of the appended claims. Therefore, in some embodiments, well-known process steps, well-known device structures, and well-known techniques have not been described in detail to avoid obscuring the invention. Throughout the specification, the same reference numerals denote the same elements.

[0040] In the accompanying drawings, the thickness of layers and regions is exaggerated to clearly show multiple layers and regions. Throughout the specification, similar components are indicated by the same reference numerals. When an element such as a layer, film, region, or plate is referred to as being "on" another element, it may be directly on the other element, or there may be intermediate elements present. Conversely, when a component is referred to as being "directly on another component," it should be understood that there are no other components between them. Similarly, when an element is referred to as being "below another element," it may be directly below the other element, or there may be intermediate elements present. Conversely, when a component is referred to as being "directly below another component," it should be understood that there are no other components between them.

[0041] Throughout this specification, unless the context otherwise requires, each part may be singular or plural.

[0042] Figures 1 to 3 This is a diagram showing the bottom cover (501) according to an embodiment of the present invention. Figure 1 This is a perspective view of the bottom cover (501). Figure 2 It is a plan view of the bottom cover (501), and Figure 3 This is a longitudinal cross-sectional view of the bottom cover (501).

[0043] According to an embodiment of the present invention, the bottom cover (501) supports one side of the bottom surface of the battery cell (101), which will be described later. For example, the bottom cover (501) may support the lower surface of the battery cell (101).

[0044] Reference Figures 1 to 3 According to an embodiment of the present invention, the bottom cover (501) includes a lower cover portion (520) and an upper cover portion (510).

[0045] The lower part of the cover (520) is formed to be flat and faces the bottom (25) of the battery pack housing (20) of the battery pack (10), which will be described later. In this way, the lower part of the cover (520) can be formed to ensure a wide contact area.

[0046] The top part (510) faces the bottom surface of the battery cell (101), which will be described later, and a raised pattern (511) protruding toward the battery cell (101) is formed thereon. Here, the bottom surface can be the lower surface of the battery cell (101).

[0047] For example, the raised pattern (511) formed on the upper part (510) of the cover may include a circle. However, in embodiments of the present invention, the raised pattern (511) is not limited to a circle, and the raised pattern (511) may be formed in a shape corresponding to a groove formed on one side of the bottom surface of the facing battery cell (101). That is, when the bottom cover (501) supports the battery cell (101), the raised pattern (511) of the bottom cover (501) is inserted into at least a portion of the groove formed on the lower surface of the battery casing (400) of the battery cell (101) to fill the groove formed on the lower surface of the battery cell (101). And when the groove formed on the lower surface of the battery cell (101) is filled, the contact area of ​​the battery cell (101) increases.

[0048] At least one bottom surface of the battery cell (101), which will be described later, may not be structurally completely flat and may have grooves. In this way, an air gap is formed due to the grooves formed on one bottom surface of the battery cell (101), and as a result, the contact area is reduced, which can reduce the cooling efficiency of the battery cell (101).

[0049] However, according to an embodiment of the present invention, the bottom cover (501) fills the groove formed on one side bottom surface of the battery cell (101) to increase the contact area and improve the cooling efficiency.

[0050] Furthermore, the bottom cover (501) can be made of a metallic material with a thermal conductivity higher than or equal to that of the battery casing (400) of the battery cell (101). For example, the bottom cover (501) can be made of copper, aluminum, or an alloy containing copper and aluminum. Therefore, the bottom cover (501), which is in contact with the lower surface of the battery cell (101), improves the cooling efficiency of the battery cell (101).

[0051] Additionally, the bottom cover (501) may be coated with an insulating material. For example, the bottom cover (501) may be coated with epoxy resin. Thus, if necessary, the bottom cover (501) may insulate the battery casing (400) of the battery cell (101) described later from the battery pack casing (20) of the battery pack (10) described later from each other.

[0052] According to this configuration, the bottom cover (501) according to an embodiment of the present invention can stably support one bottom surface of the battery cell (101) while improving the cooling efficiency of the battery cell (101). In addition, the bottom cover (501) can be insulated between one bottom surface of the battery cell (101) and the battery pack housing (20) that houses the battery cell (101).

[0053] Figure 4 and Figure 5This is a diagram illustrating, by way of example, a battery cell (101) supported by a bottom cover according to an embodiment of the present invention. Figure 4 This is a perspective view of the battery cell (101), and Figure 5 This is a longitudinal cross-sectional perspective view of the battery cell (101).

[0054] Reference Figure 4 and Figure 5 The battery cell (101) may include a battery housing (400), an electrode assembly (110), a cover plate (450), a sealing gasket (240), a current collector (220 and 320), an insulating plate (280), an electrode terminal (330), and a terminal gasket (340).

[0055] The electrode assembly (110) includes a first electrode having a first polarity, a second electrode having an opposite polarity, and a diaphragm disposed between the first electrode and the second electrode. For example, the first electrode may be an anode or a cathode, while the second electrode may correspond to an electrode with a polarity opposite to that of the first electrode.

[0056] The electrode assembly (110) may have a structure in which a first electrode, a second electrode, and a diaphragm inserted between the first and second electrodes are wound in a single direction. The electrode assembly (110) may have, for example, a core structure. That is, the electrode assembly (110) can be manufactured by winding a laminate at least once in a direction around a winding center, the laminate being formed by stacking a sheet-type first electrode current collector, a sheet-type second electrode current collector, and a diaphragm inserted between them. However, embodiments of the present invention are not limited to the above description, and any core structure known to those skilled in the art can be applied without limitation.

[0057] The first electrode includes a first electrode current collector and a first electrode active material coated on one or both surfaces of the first electrode current collector. At one end of the first electrode current collector in the width direction, a first uncoated portion (111) uncoated with the first electrode active material is provided. The first uncoated portion (111) can serve as a first electrode tab. The first uncoated portion (111) is provided at the lower part in the height direction of the electrode assembly (110) housed in the battery casing (400). That is, the first electrode current collector includes the first uncoated portion (111), the long side end of the first uncoated portion (111) is not coated with an active material layer and is exposed to the outside of the separator, and a portion of the first uncoated portion (111) itself serves as an electrode tab. For example, in this specification, the first electrode can be a negative electrode, and the first uncoated portion (111) can serve as a negative electrode tab.

[0058] The second electrode includes a second electrode current collector and a second electrode active material layer coated on one or both surfaces of the current collector. At opposite ends of the second electrode current collector in the width direction, a second uncoated portion (112) uncoated with the second electrode active material is provided. The second uncoated portion (112) can serve as a second electrode tab. The second uncoated portion (112) is provided at the upper part in the height direction of the electrode assembly (110) housed in the battery casing (400). That is, the second electrode current collector includes a second uncoated portion (112), the long side end of which is not coated with the active material layer and is exposed to the outside of the separator, and at least a portion of the second uncoated portion (112) itself serves as an electrode tab. For example, in this specification, the second electrode can be a positive electrode, and the second uncoated portion (112) can serve as a positive electrode tab.

[0059] The first uncoated portion (111) and the second uncoated portion (112) may extend in opposite directions along the height direction of the cylindrical battery cell (101). In this invention, the positive electrode active material coated on the positive electrode plate and the negative electrode active material coated on the negative electrode plate may be used without limitation, as long as they are active materials known to those skilled in the art.

[0060] An opening may be formed in the lower part of the battery casing (400). That is, an opening may be provided in the lower part of the battery cell (101). The battery casing (400) accommodates the electrode assembly (110) and also accommodates the electrolyte through the opening formed in the lower part.

[0061] Meanwhile, the electrode terminal (330), which will be described later, can be disposed on the upper surface opposite to the opening of the battery casing (400). For example, in this specification, the electrode terminal (330) can be electrically connected to the second uncoated portion (112) of the second electrode, which can be used as a positive electrode. That is, the electrode terminal (330) can be a positive terminal.

[0062] Specifically, the battery housing (400) includes a circular bottom, a side (412) extending from the bottom, and a press-fit portion (430) formed by bending the end of the side (412) inward.

[0063] Additionally, the battery casing may include a rolled edge (420) formed by inwardly pressing the side portion 412 adjacent to the press-fit portion (430).

[0064] The crimping portion (430) can be bent and extended into the interior of the battery housing (400) to surround and secure the edge of the cover plate (450) together with the sealing gasket (240) described later.

[0065] Specifically, a crimping portion (430) may be formed in the lower region of the battery housing (400). The crimping portion (430) may be bent and extended inward from the lower periphery of the battery housing (400) along the radial direction of the cylindrical battery cell (101). The crimping portion (430) is provided in the region corresponding to the edge periphery of the cover plate (450) described later and secures the cover plate (450), thereby preventing the cover plate (450) from falling downward.

[0066] Additionally, when the battery housing (400) is provided with a rolled edge (420), a crimping portion (430) can be formed below the rolled edge (420). The crimping portion (430) extends from the rolled edge (420) and is bent and extended to surround the outer surface of the cover plate (450) placed below the rolled edge (420) and a portion of the lower surface of the cover plate (450). The lower end of the crimping portion (430) can extend inward a predetermined distance in the radial direction of the cylindrical battery cell (101) and surround a portion of the lower surface of the cover plate (450). In this way, the crimping portion (430) fixes the periphery of the lower surface edge of the cover plate (450). That is, the area around the edge of the cover plate (450) is between the lower end of the crimping portion (430) and the rolled edge (420) and is fixed to the battery housing (400) to cover the opening of the battery housing (400).

[0067] Alternatively, the crimping portion (430) may be formed to wrap a portion of the first collector plate (220), which will be described later, around the edge of the cover plate (450).

[0068] A rolled edge (420) can be formed by pressing inwards the outer periphery of the battery housing (400). That is, the rolled edge (420) has a shape that is recessed radially to a predetermined depth from the outer surface of the battery housing (400) and extends in the circumferential direction of the battery housing (400). The rolled edge (420) prevents the electrode assembly (110) having a size corresponding to the width of the battery housing (400) from being released through the lower opening of the battery housing (400) and can also serve as a support on which a cover plate (450) is mounted.

[0069] The cover plate (450) has an edge that is pressed against the crimp portion (430) of the battery housing (400) to cover the open end of the battery housing (400).

[0070] In other words, the cover plate (450) forms one side surface of the battery cell (101), that is, the bottom surface of the battery casing (400).

[0071] For example, the cover plate (450) is non-polar and can be made of a metallic material to ensure rigidity. That is, even if the cover plate (450) is made of a conductive metallic material, it can still be non-polar. In other words, the cover plate (450) can be electrically insulated from the battery casing (400) used as the negative terminal and from the electrode terminal (330) used as the positive terminal.

[0072] Therefore, the cover plate (450) does not need to be electrically connected to the electrode assembly (110) or the battery casing (400), and its material does not necessarily need to be a conductive metal.

[0073] Meanwhile, the edge of the cover plate (450) can be surrounded by a sealing gasket (240) which will be described later and placed on the rolled edge (420).

[0074] The sealing gasket (240) is rolled together with the edge of the cover plate (450) via the crimping portion (430) of the battery housing (400), thereby sealing the battery housing (400). In this case, the sealing gasket (240) can be bent together with the curved shape of the crimping portion (430) of the battery housing (400). When the battery housing (400) includes a rolled portion (420), the sealing gasket (240) can be disposed between the lower surface of the rolled portion (420) and the lower end of the crimping portion (430).

[0075] Therefore, the sealing gasket (240) is inserted between the press-fit portion (430) of the cover plate (450) and the battery housing (400) to seal the lower end of the opening of the battery housing (400) and to electrically insulate the battery housing (400) from the cover plate (450). Thus, the sealing gasket (240) can be formed of a material with insulating and elastic properties and can include a polymer resin.

[0076] For example, the sealing gasket (240) may include one or more heat-resistant resins selected from the group consisting of polypropylene (PP), polyethylene (PE), polyimide (PI), polycarbonate (PC), polybutylene terephthalate (PBT) and polystyrene (PS).

[0077] Additionally, the battery housing (400) can be electrically connected to the electrode assembly (110). The battery housing (400) can, for example, be electrically connected to a first uncoated portion (111) of the electrode assembly (110). In this case, the battery housing (400) can have the same polarity as the first uncoated portion (111). For example, the battery housing (400) can be used as the negative terminal.

[0078] The electrode terminal (330) may have a riveting structure. Specifically, the electrode terminal (330) may be riveted through a through hole formed in the bottom surface of the battery casing (400). In addition, a terminal washer (340) may be provided between the electrode terminal (330) and the outer diameter of the through hole.

[0079] The electrode terminal (330) can be electrically connected to the second uncoated portion (112) of the electrode assembly (110). In this case, the electrode terminal (330) can have the same polarity as the second uncoated portion (112). For example, the electrode terminal (330) can be used as a positive terminal.

[0080] The current collectors (220 and 320) may include a first current collector (220) and a second current collector (320), the first current collector (220) electrically connecting a first uncoated portion (111) of the electrode assembly (110) to the battery housing (400), and the second current collector (320) electrically connecting a second uncoated portion (112) of the electrode assembly (110) to the electrode terminal (330).

[0081] Specifically, one end of the first current collector (220) can be inserted between the sealing gasket (240) and the rolled edge (420) to contact the rolled edge (420), while the other end of the first current collector (220) can contact the first uncoated portion (111) of the electrode assembly (110). In this case, when the end of the crimping portion (430) of the battery housing (400) is bent to press into the sealing gasket (240), one end of the first current collector (220) can be pressed together with and fixed together with the edge of the cover plate (450).

[0082] An insulating plate (280) is inserted between the second current collector 320 and the battery housing (400) to prevent the second current collector 320 from being electrically connected to the battery housing (400).

[0083] Meanwhile, in embodiments of the present invention, the vertical orientation of the battery cell (101) can be changed as needed, according to the form in which the battery cell (101) is housed in the battery pack (10), which will be described later. That is, as... Figure 4 and Figure 5 As shown, the electrode terminals (330) are arranged facing upwards and the cover plate (450) is arranged facing downwards; however, the arrangement of the battery cells (101) is not limited to this, and the electrode terminals (330) may instead face downwards and the cover plate (450) face upwards.

[0084] As described above, at least one bottom surface of the battery cell (101) is not flat and has a groove formed therein. For example, the crimping portion (430) of the battery casing (400) has a curved and extended shape to surround the outer surface of the cover plate (450) and a portion of the lower surface of the cover plate (450). Therefore, the bottom surface where the cover plate (450) is located has a circular groove. In addition, due to the protrusion of the electrode terminals (330), the bottom surface where the electrode terminals (330) are located is not formed to be flat.

[0085] That is, preferably, according to the arrangement of the battery cells (101), the raised pattern (511) formed on the bottom cover (501) according to an embodiment of the present invention has a shape corresponding to the groove formed on the lower surface of the battery cells (101). Figure 1 In the example shown, the raised pattern (511) of the bottom cover (501) is circular, but the embodiments of the present invention are not limited to this.

[0086] Figure 6 An exemplary embodiment is shown in which a bottom cover (501) supports a battery cell (101) according to an embodiment of the present invention.

[0087] like Figure 6 As shown, the bottom cover (501) may include: a lower cover portion (520) facing the bottom (25) of the battery pack housing (20) which will be described later; and an upper cover portion (510) facing the bottom surface of the battery cell (101) and having a raised pattern (511) protruding toward the battery cell (101) formed thereon.

[0088] Furthermore, the raised pattern (511) formed on the upper part (510) of the bottom cover (501) can be inserted into at least a portion of the groove formed on the lower surface of the battery casing (400) of the battery cell (101). At this time, the lower part (520) of the cover facing the bottom (25) of the battery pack casing (20) to be described later can be formed as flat. Therefore, the bottom cover (501) increases the contact area of ​​the lower surface of the battery cell (101) and helps to ensure good heat transfer between the bottom (25) of the battery pack casing (20) of the battery pack (10) or the thermal interface material (TIM) 24 and the battery cell (101).

[0089] Figure 7 This is an enlarged view of a portion of the battery pack (10), used to explain the battery pack (10) including the bottom cover (501).

[0090] Reference Figure 7According to an embodiment of the present invention, the battery pack (10) may include at least one battery cell (101) and a bottom cover (501) supporting the battery cell. Furthermore, the battery pack (10) according to the present invention may include a battery pack housing (20) and a bottom cover (501) configured to accommodate at least one battery cell (101).

[0091] As described above, the battery cell (101) may include a battery housing (400) with grooves formed on its lower surface and an electrode assembly (110) housed in the battery housing (400).

[0092] As described above, the bottom cover (501) can be located between one bottom surface of the battery cell (101) and the bottom (25) of the battery pack housing (20) to support the battery cell (101).

[0093] Additionally, cooling channels (26) can be formed in the bottom 24 of the battery pack housing (20). As the coolant moves through these cooling channels (26), it dissipates the heat generated in the battery cell 101. In other words, the heat transferred from the battery cell (101) to the bottom (25) of the battery pack housing (20) through the bottom cover (501) can be effectively dissipated through the cooling channels (26).

[0094] Furthermore, the thermal interface material (TIM) 24 can be located between the bottom (25) of the battery pack housing (20) and the bottom cover (501). Therefore, the heat generated from the battery cell (101) can be managed more effectively.

[0095] In addition to the battery cells (101), the battery pack (10) may also include various other components known at the time of submission of this invention, such as a battery management system (BMS), a battery disconnect unit (BDU), a relay, and a current sensor.

[0096] Figure 7 It shows including Figure 6 The diagram of the vehicle (1) with battery pack (10).

[0097] See Figure 7 The vehicle (1) according to the present invention may include at least one battery pack (10) according to the present invention.

[0098] The battery pack (10) according to the invention can be applied to a vehicle (1) such as an electric vehicle or a hybrid vehicle. That is, a vehicle (1) according to the invention can include the battery pack (10) according to the invention. In addition to the battery pack (10), the vehicle (1) according to the invention can also include various other components included in the vehicle. For example, in addition to the battery pack (10), the vehicle (1) according to the invention can also include a body, an electric motor, and control devices such as an electronic control unit (ECU).

[0099] Although the operations are shown in a specific order in the accompanying drawings, it should not be understood that these operations must be performed in the described order or in any order, nor should it be understood that all the described operations must be performed to achieve the desired result.

[0100] The above description is merely an illustration of the technical concept of this embodiment. Those skilled in the art can make various modifications and alterations without departing from the essential characteristics of this embodiment. Therefore, these embodiments are not intended to limit the technical concept of the present invention, but rather to illustrate it, and the scope of the technical concept of the present invention is not limited to these embodiments. The scope of protection of this embodiment should be interpreted based on the following claims, and all technical concepts falling within the equivalent scope should be interpreted as being included within the scope of the claims of this embodiment.

[0101] Industrial applicability

[0102] The present invention can be used to provide a bottom cover that can stably support one side of a battery cell and at the same time improve the cooling efficiency of the battery cell, as well as a battery pack and a vehicle including the bottom cover.

Claims

1. A bottom cover, the bottom cover supporting one bottom surface of a battery cell, the bottom cover comprising: The flat underside of the lid; as well as The upper part of the cover faces the bottom surface of one side of the battery cell, and the upper part of the cover has a raised pattern protruding in the direction of the battery cell.

2. The bottom cover according to claim 1, wherein, The bottom cover is made of a material including at least one of copper and aluminum.

3. The bottom cover according to claim 1, wherein, The bottom cover is coated with epoxy resin.

4. The bottom cover according to claim 1, wherein, The raised pattern includes a circular shape.

5. A battery pack, the battery pack comprising: A battery cell, comprising a battery casing and an electrode assembly, wherein a groove is formed on one bottom surface of the battery casing, and the electrode assembly is housed within the battery casing; A battery pack housing that houses at least one of the battery cells; as well as A bottom cover is inserted between one bottom surface of the battery cell and the bottom of the battery pack casing to support the battery cell. The bottom cover includes: The lower part of the cover faces the bottom of the battery pack housing; and The upper part of the cover faces the bottom surface of one side of the battery cell, and the upper part of the cover has a raised pattern protruding in the direction of the battery cell.

6. The battery pack according to claim 5, wherein, The raised pattern formed on the upper part of the bottom cover is inserted into at least a portion of the groove formed on one side of the bottom surface of the battery casing of the battery cell.

7. The battery pack according to claim 5, wherein, The lower part of the cover facing the bottom of the battery pack housing is formed to be flat.

8. The battery pack according to claim 5, wherein, The bottom cover is made of a metallic material with a thermal conductivity equal to or higher than that of the battery casing of the battery cell.

9. The battery pack according to claim 5, wherein, The bottom cover is made of a material including at least one of copper and aluminum.

10. The battery pack according to claim 5, wherein, The bottom cover is coated with an insulating material.

11. The battery pack according to claim 5, wherein, The bottom cover is coated with epoxy resin.

12. The battery pack according to claim 5, wherein, The raised pattern formed on the upper part of the cover of the bottom cover includes a circular shape.

13. The battery pack according to claim 5, wherein, A cooling flow path is formed in the bottom of the battery pack housing.

14. The battery pack according to claim 5, wherein, A thermal interface material (TIM) is inserted between the bottom of the battery pack housing and the bottom cover.

15. A vehicle comprising at least one battery pack according to any one of claims 5 to 14.

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