Battery pack and electric device

Abstract

Provided are a battery pack for a secondary battery, which can improve the efficiency of a manufacturing process of the secondary battery and the performance or structural stability of the battery pack for a secondary battery, and an electric device. The battery pack may include: a battery cell having two end portions along a height direction; a cell holder accommodating the battery cells therein; a frame portion covering a side surface portion of the cell holder; an adhesive portion disposed between the cell holder and the frame portion; and a rib portion extending along an outer periphery of a side surface portion of the cell holder and dividing the side surface portion of the cell holder into a first region and a second region spaced apart from each other in a height direction.

Description

Technical Field

[0001] The embodiments relate to a battery pack, and more specifically, to a battery pack for improving the performance or structural stability of a secondary battery or a battery pack for a secondary battery. Background Technology

[0002] Typically, with the rapid development of the electrical, electronics, communications, and computer industries, the demand for high-performance and high-safety rechargeable batteries is increasing rapidly. Specifically, as electrical and electronic products become lighter, thinner, and more portable, rechargeable batteries, as a key component, also need to be lighter and smaller.

[0003] Specifically, with the emergence of environmental pollution problems such as air pollution and noise pollution caused by the large-scale popularization of automobiles, and the demand for new forms of energy due to the depletion of oil, the need to develop electric vehicles that can solve these problems has increased, and there is a need to develop batteries with high output and high energy density as power sources for vehicles.

[0004] In response to such demands, one of the most recently popular high-performance, next-generation, high-tech new batteries is the rechargeable battery. Lithium, used as the positive electrode, is of great interest as an electrode material for high-energy-density batteries due to its very low density and standard reduction potential.

[0005] The information disclosed above in the background section of this disclosure is intended only to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] The embodiments are intended to provide a battery pack that can improve the performance or structural stability of a secondary battery or a battery pack used for a secondary battery.

[0007] The problems to be solved by this disclosure are not limited to those described herein, and other objects and advantages of this disclosure will be understood from the following description and will become more apparent from embodiments thereof. Furthermore, it will be readily understood that the objects and advantages of this disclosure can be achieved by the means set forth in the appended claims and combinations thereof.

[0008] Other aspects will be set forth in part in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosed embodiments.

[0009] According to some embodiments of the present technology for solving the above-mentioned technical problems, a battery pack may include: a battery cell having two ends along the height direction; a cell holder therein housing the battery cell; a frame portion covering a side surface portion of the cell holder; an adhesive portion disposed between the cell holder and the frame portion; and a rib extending along the outer periphery of the side surface portion of the cell holder and dividing the side surface portion of the cell holder into a first region and a second region spaced apart from each other along the height direction.

[0010] In some embodiments of this disclosure, the rib may include: a first rib extending along the outer periphery of the monomer holder; and a second rib spaced apart from the first rib by a predetermined gap in the height direction, and the second rib may be arranged relatively adjacent to a surface defining the bottom of the monomer holder compared to the first rib.

[0011] In some embodiments, the monomer retainer may include at least one corner, and a second rib may be arranged at at least one corner of the monomer retainer.

[0012] In some embodiments, the second rib may be symmetrical with respect to the line of at least one corner forming the monomer retainer.

[0013] In some embodiments, the first rib may be spaced apart from the line forming at least one corner of the monomer retainer.

[0014] In some embodiments, the rib may further include a connecting rib having two ends that are respectively connected to the ends of the first rib and the second rib, and extending at a predetermined angle relative to the first rib.

[0015] In some embodiments, the connecting ribs may be configured as a plurality of connecting ribs, and the plurality of connecting ribs may be arranged symmetrically with respect to the lines forming the corners of the single-unit retainer.

[0016] In some embodiments, the preset angle may be equal to or greater than 90 degrees.

[0017] In some embodiments, the distance in the height direction from the other surface of the monomer retainer opposite to one surface to the first rib may be greater than or equal to the distance in the height direction from one surface of the monomer retainer to the second rib.

[0018] In the presented embodiment, the preset gap may be equal to or greater than the distance from one surface of the monomer retainer to the second rib in the height direction.

[0019] In the presented embodiment, the adhesive portion may contact the rib and may be spaced apart from a surface defining the bottom of the monomer holder.

[0020] In some embodiments, a first region may be spaced apart from a surface defining the bottom of the monomer holder, a second region may be located between the first region and a surface of the monomer holder, and an adhesive portion may be located on the first region.

[0021] According to other embodiments of the present disclosure for solving the above-mentioned technical problems, the battery pack may include: a battery cell having two ends along the height direction; a cell holder that houses the battery cell and includes at least one corner; a frame portion that covers a side surface portion of the cell holder and has a bend formed in a region corresponding to the at least one corner; and a rib that extends along a predetermined path on the side surface portion of the cell holder and divides the side surface portion of the cell holder into a first region and a second region spaced apart from each other along the height direction.

[0022] In some embodiments of this disclosure, the rib may include: a first rib extending along the outer periphery of the monomer holder; and a second rib spaced apart from the first rib by a predetermined gap in the height direction, and the second rib may be arranged adjacent to a surface defining the bottom of the monomer holder.

[0023] In some embodiments, the second rib may be arranged at at least one corner of the monomer retainer.

[0024] In some embodiments, the rib may further include a connecting rib having two ends that are respectively connected to the ends of the first rib and the second rib, and extending at a predetermined angle relative to the first rib.

[0025] In some embodiments, the connecting ribs may be configured as a plurality of connecting ribs, and the plurality of connecting ribs may be arranged symmetrically with respect to the line forming at least one corner of the single-unit retainer.

[0026] In some embodiments, a notch may be formed on the side of the frame portion adjacent to the bend, such that the internal space and the external space of the frame portion are connected to each other, and the connecting rib may be located in the region corresponding to the notch.

[0027] In some embodiments, the notch may be arranged adjacent to a surface defining the bottom of the monomer holder, and the distance from the notch to the first rib in the height direction may be at least three times the distance from the notch to the second rib in the height direction.

[0028] In some embodiments, the rib may further include a reinforcing rib disposed between a surface defining the bottom of the monomer holder and the second rib, and connected to the outer peripheral surface of the monomer holder and one side of the second rib. Attached Figure Description

[0029] The above and other aspects, features and advantages of certain disclosed embodiments will become more apparent from the following description taken in conjunction with the accompanying drawings.

[0030] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the detailed description of the present disclosure below, serve to further understand the technical concept of the present disclosure; therefore, the present disclosure should not be construed as limited to the matters described in such drawings: Figure 1 This is a perspective view showing a battery pack according to some exemplary embodiments of the present disclosure; Figure 2 It is shown Figure 1 Exploded perspective view of the battery pack; Figure 3 yes Figure 1 A magnified view of part A in the image; Figure 4 This is a perspective view showing a single-unit holder according to some exemplary embodiments of the present disclosure; Figure 5 yes Figure 4 The front view of the monomer holder shown; Figure 6 yes Figure 4 The side view of the monomer holder shown; and Figure 7 It is shown Figure 4 A magnified view of part B. Detailed Implementation

[0031] Reference will now be made in detail to embodiments, examples of which are shown in the accompanying drawings, wherein the same reference numerals always denote the same elements. In this respect, the presented embodiments may have different forms and should not be construed as limited to the description set forth herein. Therefore, only some embodiments are described below with reference to the accompanying drawings to explain some aspects. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. When a statement such as “at least one of…” follows a list of elements, it modifies the entire list of elements, without modifying any individual element within that list.

[0032] In the following, some embodiments of this disclosure will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their ordinary or dictionary meaning, but should be interpreted as conforming to the meaning and concept of the technical idea of ​​this disclosure, based on the principle that the inventor can appropriately define the concepts of the terms in order to best interpret his or her own technology. Therefore, the embodiments described in this specification and the constructions shown in the accompanying drawings are merely some exemplary embodiments of this disclosure and do not represent all the technical ideas of this disclosure. It should be understood that various equivalents and modifications may exist that can replace them at the time of filing this application.

[0033] Additionally, when the words “comprising” or “including” and / or variations thereof are used herein, the presence of the stated features, quantities, steps, operations, components, elements and / or groups thereof is specified, but the presence or addition of one or more other features, quantities, steps, operations, components, elements and / or groups thereof is not excluded.

[0034] To aid in understanding this disclosure, the accompanying drawings are not shown to scale, and some components may be exaggerated in size. Furthermore, components in different embodiments may be assigned the same reference numerals.

[0035] The statement that two comparison targets are “equal” to each other means that the two comparison targets are “substantially equal” to each other. Therefore, substantially equal can include situations where there is a deviation considered low in the art, for example, a deviation within 5%. Furthermore, the construction of a particular parameter being constant in a certain region can mean that the parameter is constant from an average point of view.

[0036] Although the terms first, second, etc., are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another, and unless otherwise specifically stated, it will be understood that a first component can also be a second component.

[0037] Throughout this specification, unless otherwise specifically stated, each element may be singular or plural.

[0038] It will be understood that when a component is referred to as being "above (or below)" or "over (or under)" another component, it can be positioned to contact the upper (or lower) surface of said other component, but the other component can be positioned between said component and said other component above (or below) said component.

[0039] It will be further understood that when components are referred to as “connected,” “joined,” or “engaged” to another component, these components may be directly connected or directly engaged with each other, but an intermediary element may be present between them, or each component may be “connected,” “joined,” or “engaged” to each other through another component. Throughout this disclosure, when a component is referred to as “electrically connected” to another component, it may include not only the case where they are “directly connected,” but also the case where they are “connected” with another element placed therebetween.

[0040] In this disclosure, unless otherwise stated, “A and / or B” means A, B, or A and B. That is, “and / or” includes all or any combination of the listed items. “C to D” means C or greater and D or less, unless otherwise stated.

[0041] The terminology used herein is for the purpose of describing some embodiments of this disclosure and is not intended to limit this disclosure.

[0042] As described herein, lithium can be used as the positive electrode in secondary batteries, but the battery is not limited to this.

[0043] In a battery pack that houses such a secondary battery, when the adhesive parts used to connect the internal components of the battery pack to the frame protrude outwards, it may reduce the performance or structural stability of the secondary battery.

[0044] Figure 1 This is a perspective view showing a battery pack according to an exemplary embodiment of the present disclosure. Figure 2 It is shown Figure 1 An exploded perspective view of the battery pack. Figure 3 yes Figure 1 An enlarged view of part A in the image.

[0045] Reference Figure 1 and Figure 2 According to an exemplary embodiment of the present disclosure, the battery pack 1 can accommodate a plurality of battery cells BC and may include a frame portion 100, a cell retainer 200, an adhesive portion 300, a cover portion 400, a fixing portion 500, and a cooling portion 600.

[0046] Battery pack 1 can provide space for installing multiple battery cells BC, and multiple battery cells BC can be electrically connected to be used as a single high-capacity power supply. Battery pack 1 can be a high-capacity battery installed in an electric vehicle.

[0047] In this specification, a battery cell BC can be a rechargeable secondary battery that supplies power to an external electronic device. For example, a battery cell BC can be interpreted as a lithium polymer battery, a lithium polymer-ion battery, a lithium-ion battery, a zinc-air battery, a lithium-sulfur battery, a lithium-air battery, a sodium-ion battery, a magnesium battery, an all-solid-state battery, etc.

[0048] Reference Figure 2 Multiple battery cells BC are shown as cylindrical cells, but not limited to them, and can be pouch cells or square cells.

[0049] Multiple battery cells BC can be of the same shape, and for the sake of simplicity, the following description will focus on the case where multiple battery cells BC are cylindrical cells.

[0050] Reference Figure 2 The battery cell BC can be along its height direction (based on Figure 2 The Z-axis direction includes two ends, for example, an upper end and a lower end, and can be configured as a cylindrical battery cell BC including a cylindrical outer peripheral surface between the upper end and the lower end.

[0051] A first electrode and a second electrode with different polarities can be located at the upper and lower ends of the battery cell BC, respectively. For example, the first electrode and the second electrode of the battery cell BC can have opposite polarities.

[0052] In some embodiments, the first electrode may be located entirely on either the upper or lower end of the battery cell BC (e.g., the lower end), and the second electrode may be located at the center of the upper end. Here, each edge region of the upper end may be formed as the first electrode.

[0053] For example, in a single battery cell BC, an integrally extended can can cover the entire lower and upper edge regions to form a first electrode of the same polarity. The central region of the upper end cap assembly, which is electrically insulated from the can forming the first electrode, can form a second electrode with a polarity different from that of the first electrode.

[0054] Although not shown in the accompanying drawings, the upper ends of adjacent battery cells BC can be electrically connected via busbars, and the lower ends of adjacent battery cells BC can also be electrically connected via busbars.

[0055] The busbar can be used to connect the central regions of the upper ends of adjacent battery cells BC and to connect the central regions of the lower ends of adjacent battery cells BC. The central region of the upper end of the battery cell BC can be formed as a cover assembly forming a second electrode, and the central region of the lower end can be formed as a canister forming a first electrode. Depending on the vertical arrangement, the central region of the upper end of the battery cell BC or the central region of the lower end of the battery cell BC can form either a first electrode or a second electrode.

[0056] In this specification, the fact that the upper end and lower end of the battery cell BC are respectively formed with a first electrode and a second electrode or a second electrode and a first electrode can be interpreted as the central region of the upper end of the battery cell BC and the central region of the lower end of the battery cell BC respectively forming a first electrode and a second electrode or a second electrode and a first electrode.

[0057] Furthermore, in this specification, the connection of the busbars to each other relative to the upper ends of adjacent battery cells BC and to each other relative to the lower ends of adjacent battery cells BC can be interpreted as the connection of the central regions relative to the upper ends of adjacent battery cells BC or the connection of the central regions relative to the lower ends of adjacent battery cells BC.

[0058] The upper and lower ends of a battery cell BC can be distinguished based on their positions and the first and second electrodes. For example, the upper and lower ends of a battery cell BC can refer to the end formed at the upper position and the end located at the lower position along the height direction of the battery cell BC, respectively.

[0059] That is, depending on the arrangement of the battery cells BC, the upper ends of adjacent battery cells BC can be formed with the first electrode or the second electrode in the same way, or they can be formed with different first electrodes and second electrodes.

[0060] Adjacent battery cells BC can be positioned along the height direction (based on...) Figure 2 The pattern arrangement is flipped in the Z-axis direction, and therefore, the upper ends of adjacent battery cells BC can form different first and second electrodes, and the lower ends of adjacent battery cells BC can also form different first and second electrodes.

[0061] A single battery cell BC can be electrically connected to other adjacent battery cells BC. Battery cells BC that are adjacent to each other along the direction of electrical connection can be arranged in a pattern that is flipped in the height direction, so that the different first and second electrodes of adjacent battery cells BC can be connected in series.

[0062] However, it is not limited to this structure, and adjacent battery cells BC can be arranged such that the same electrodes, i.e., the first electrode and the second electrode can be connected in parallel with each other.

[0063] A group of battery cells BC forming battery pack 1 can be connected in series with each of the adjacent battery cells BC, and battery pack 1 may not include parallel connections between adjacent battery cells BC.

[0064] However, this disclosure is not limited thereto, and the battery pack 1 may also include series connection and / or parallel connection between adjacent battery cells BC.

[0065] Battery cells BC that are adjacent to each other along the electrical connection direction can be arranged in an upside-down flip pattern, and the upper ends or the lower ends of adjacent battery cells BC can be connected to each other, thereby forming a series connection between different first electrodes and second electrodes.

[0066] However, this disclosure is not limited to this configuration, and parallel connections can also be formed between first electrodes of the same polarity and between second electrodes of the same polarity.

[0067] In this specification, the electrical connection direction of a battery cell BC can be interpreted as the direction in which adjacent battery cells BC are electrically connected to each other, and may not indicate a specific direction, but may include various connection directions through the arrangement of multiple busbars.

[0068] In some embodiments, the electrical connection direction of the battery cells BC can be formed in a zigzag pattern. The battery cells BC can be cylindrical, and the individual battery cells BC can be arranged in alternating positions between adjacent battery cells BC. Therefore, multiple battery cells BC can be densely arranged.

[0069] Multiple battery cells BC arranged in alternating positions can be electrically connected to each other through multiple busbars arranged in a zigzag pattern, and the direction of the zigzag electrical connection can be defined along the direction of the arrangement of the multiple busbars.

[0070] Reference Figures 1 to 3 According to an exemplary embodiment of the present disclosure, the frame portion 100 may cover the side surface portion of the cell holder 200 that fixes the battery cell BC.

[0071] In this specification, "side surface portion of the monomer holder 200" can be interpreted as the outer peripheral surface of the monomer holder 200, and for example, can be understood as the outer peripheral surface of the monomer holder 200 that faces the inner peripheral surface of the frame portion 100.

[0072] Reference Figure 2 The frame portion 100 can be formed as a surface with an opening (e.g., based on...). Figure 2 The upper surface) and the other open surface (e.g., based on) Figure 2The lower surface of the frame portion 100 has a square housing shape. For example, the frame portion 100 can be formed to have a shape that is aligned with the height direction of the battery cell BC (based on the height direction of the battery cell BC). Figure 2 The shape of the square column in the length direction corresponding to the Z-axis direction.

[0073] The inner peripheral surface of the frame portion 100 may face the outer peripheral surface of the monomer holder 200. For example, the inner peripheral surface of the frame portion 100 may face the rib 201 formed on the outer peripheral surface of the monomer holder 200 (as will be discussed later). Figure 4 (as described).

[0074] The individual retainer 200 can be assembled inside the frame portion 100, and the external terminals can be located on the frame portion 100. The external terminals can be formed to expose the outside of the frame portion 100 and can be connected to an external device to form a path for charging and discharging current.

[0075] External terminals can be electrically connected to multiple battery cells BC installed in the cell holder 200. For example, a busbar can be connected to the external terminals, and the external terminals can be connected to the electrodes of the battery cells BC via the busbar or lead wires.

[0076] Reference Figure 3 The frame portion 100 can be formed into a flat, bent (folded) shape, and in this specification, the side of the frame portion 100 that is bent to form a corner is referred to as the bent portion 101. The bent portion can be formed in the region corresponding to the corner of the monomer holder.

[0077] The inner peripheral surface of the frame portion 100 with the bend 101 can face the corner of the unit holder 200. For example, the connecting rib 230 (described later) can be located on the corner side of the unit holder 200, and the outer peripheral surface of the connecting rib 230 can face the inner peripheral surface of the frame portion 100 with the bend 101.

[0078] As described above, the frame portion 100 may have the shape of a square column, and four curved portions 101 may be formed on the frame portion 100. The four curved portions 101 may respectively form the corners of the square column.

[0079] A notch 102, which is shaped like a notch or a hole, can be formed on the side of the frame portion 100 adjacent to the bent portion 101. Therefore, the notch 102 can be formed in the area of ​​stress concentration generated during the process of bending the frame portion 100 to form the bent portion 101, thereby reducing the occurrence of micro-cracks or tears in the frame portion 100.

[0080] The notch 102 may be arranged adjacent to the bend 101, for example, it may be located on the outer peripheral surface of the frame portion 100 adjacent to the cooling portion 600.

[0081] The notch 102 can be arranged to face the second region A2, which will be described later, on the outer peripheral surface of the single-unit retainer 200, and can be spaced apart from the first region A1 by a predetermined gap.

[0082] The notch 102 allows the inner and outer sides of the frame portion 100 to communicate with each other, and for example, the space between the frame portion 100 and the single-piece retainer 200 and the outer space of the frame portion 100 can communicate with each other through the notch 102.

[0083] The adhesive portion 300 may be located between the inner peripheral surface of the frame portion 100 and the outer peripheral surface of the monomer holder 200. In some embodiments, the adhesive portion 300 may be located between a first region A1 of the outer peripheral surface of the monomer holder 200 and the inner peripheral surface of the frame portion 100 facing the first region A1. The adhesive portion may include adhesive.

[0084] Using the construction described herein, the adhesive portion 300 can provide the effect of securing the inner peripheral surface of the frame portion 100 and the outer peripheral surface of the monomer retainer 200 to each other and / or enhancing the structural stability of the frame portion 100 and / or the monomer retainer 200.

[0085] Figure 4 This is a perspective view showing a single-unit retainer according to an exemplary embodiment of the present disclosure. Figure 5 yes Figure 4 The front view of the monomer holder is shown in the image. Figure 6 yes Figure 4 The side view of the monomer holder shown. Figure 7 It is shown Figure 4 A magnified view of part B.

[0086] Reference Figure 4 According to an exemplary embodiment of the present disclosure, the cell holder 200 may be configured to internally accommodate a plurality of battery cells BC and may include a rib 201 on the outer peripheral surface.

[0087] The cell holder 200 can form multiple cell spaces for accommodating the respective battery cells BC, and for example, can form a cylindrical cell space for accommodating a cylindrical battery cell BC.

[0088] Reference Figure 2The cell holder 200 can form multiple cell spaces, each corresponding to a battery cell BC. The cell holder 200 can be assembled along a direction facing the fixed portion 500 (described later), with the multiple battery cells BC placed therebetween.

[0089] Reference Figure 2 and Figure 4 The single-unit retainer 200 may include four side surface portions for housing in one direction (based on Figure 2 (in the X-axis direction) and another direction (based on) Figure 2 The battery cells BC are arranged in a matrix in the Y-axis direction, and correspondingly, the frame portion 100 can be formed in a square shape to accommodate or face the four side surfaces of the cell holder 200.

[0090] However, the technology is not limited to this, and the shape of the cell holder 200 or the arrangement of the cell BC can be modified in various ways according to the specific design.

[0091] Reference Figures 4 to 7 The rib 201 may be located on the side surface of the monomer holder 200, and for example, may extend along the outer periphery of the side surface of the monomer holder 200.

[0092] The rib 201 can be formed as a rib or flange that protrudes laterally from the side surface of the single retainer 200 toward the inner peripheral surface of the frame portion 100. The rib 201 can be integrally formed with the single retainer 200.

[0093] Rib 201 can divide the side surface portion of the single-unit retainer 200 into sections in the height direction (based on...) Figure 2 The first region A1 and the second region A2 are spaced apart from each other along the Z-axis.

[0094] In some embodiments, the rib 201 may extend along the outer periphery of the monomer holder 200 on the side surface portion of the monomer holder 200, and the side surface portion of the monomer holder 200 may be divided into a first region A1 and a second region A2 based on the rib 201.

[0095] In this specification, "first region A1" can be interpreted as one side of the side surface portion of the monomer retainer 200 based on the rib 201 (e.g., based on...). Figure 5 The area on the upper side. The first area A1 can be connected to the fixed part 500 and can be spaced apart from the cooling part 600 by a preset gap.

[0096] In some embodiments, "second region A2" can be interpreted as the other side of the side surface portion of the monomer retainer 200 based on the rib 201 (e.g., based on...). Figure 5The area below the cooling section 600. The second area A2 can be arranged adjacent to the cooling section 600 and spaced apart from the fixing section 500 by a preset gap.

[0097] The adhesive portion 300 can be positioned / applied to the first region A1 of the side surface, and the first region A1 and the second region A2 can be separated by the rib 201. Therefore, leakage or downward flow of the adhesive portion 300 into the second region A2 can be reduced / suppressed.

[0098] This can help reduce / suppress the phenomenon of the adhesive portion 300 leaking to the outside of the battery pack 1 through the notch 102 facing the second region A2 of the frame portion 100.

[0099] In the following, a detailed description of a particular exemplary shape of rib 201 will be given, which enables adhesive portion 300 to securely connect the corners of frame portion 100 and monomer retainer 200 while reducing the amount of adhesive portion 300 leaking to the outside of frame portion 100.

[0100] Reference Figures 4 to 7 Rib 201 may include a first rib 210 extending circumferentially along the monomer retainer 200, and in the height direction (based on...) Figure 4 The second rib 220 spaced apart from the first rib 210 in the Z-axis direction, the connecting rib 230 connecting the first rib 210 and the second rib 220, and the reinforcing rib 240 that strengthens the rigidity of the second rib 220.

[0101] Compared to the first rib 210, the second rib 220 may be positioned adjacent to and / or relatively close to a surface of the bottom of the defining monomer holder 200.

[0102] In this specification, "defining a surface of the bottom of the monomer holder 200" can be interpreted as one side of the monomer holder 200 (e.g., based on...). Figure 4 The bottom surface of the cell holder 200 (or the surface of the cell holder 200 facing the cooling portion 600) may also be interpreted as a surface adjacent to the lower end of the cell BC in some embodiments.

[0103] Reference Figures 5 to 7 The first rib 210 and the second rib 220 can be parallel to each other. For example, the first rib 210 and the second rib 220 can be arranged on the side surface of the unit holder 200, parallel to each other and spaced apart by a predetermined gap, and the direction in which the first rib 210 and the second rib 220 extend can be parallel to a surface defining the bottom of the unit holder 200.

[0104] In an exemplary embodiment, the first rib 210 and the second rib 220 may be arranged on the side surface of the unit retainer 200 to be parallel to each other and spaced apart by a predetermined gap, and the direction in which the first rib 210 and the second rib 220 extend may be perpendicular to the direction in which the connecting rib 230 (described later) extends.

[0105] In the side region of the single-unit retainer 200, on one side of the first rib 210 and the second rib 220 (e.g., as Figure 4 The area corresponding to the upper side shown can be the first area A1, and the other side of the first rib 210 and the second rib 220 (e.g., as shown) Figure 4 The area corresponding to the lower side shown in the diagram can be the second area A2.

[0106] For example, a first region A1 may be spaced apart from a surface defining the bottom of the monomer holder 200, a second region A2 may be disposed between the first region A1 and a surface defining the bottom of the monomer holder 200, and a rib 201 may be disposed on the boundary between the first region A1 and the second region A2.

[0107] The unit retainer 200 may include at least one corner, and a second rib 220 may be arranged at the corner of the unit retainer 200. The second rib 220 may also be arranged as a bend 101 facing the frame portion 100.

[0108] Reference Figure 4 and Figure 7 The second rib 220 may be formed symmetrically with respect to the line CL (hereinafter referred to as the "corner line") forming the corner of the individual retainer 200. For example, the direction in which the second rib 220 extends may be perpendicular to the corner line CL of the individual retainer 200, and the second rib 220 may be formed symmetrically in the left-right direction with respect to the corner line CL of the individual retainer 200, while intersecting with the corner line CL of the individual retainer 200.

[0109] The first rib 210 may be arranged to be spaced apart from the corner line CL of the unit retainer 200. In some embodiments, the first rib 210 may be arranged on a side surface portion of the unit retainer 200 spaced apart from the corner region of the unit retainer 200. The first rib 210 located on one side surface portion of the unit retainer 200 and the first rib 210 located on the other side surface portion of the unit retainer 200 may be connected to each other by a second rib 220 and a connecting rib 230.

[0110] Reference Figure 7The distance between one end of the first rib 210 (e.g., the end of the first rib 210 connected to the connecting rib 230) and the corner line CL of the unit retainer 200 can be in the range of 4 mm to 12 mm. For example, the distance between the end of the first rib 210 connected to the connecting rib 230 and the corner line CL of the unit retainer 200 can be in the range of 6 mm to 10 mm.

[0111] In this specification, "first height h1" can be interpreted as in the height direction (based on...) Figure 4 The distance from one surface at the bottom of the defining unit retainer 200 to the second rib 220 in the Z-axis direction.

[0112] In some embodiments, "second height h2" can be interpreted as height in the direction (based on...) Figure 4 The distance from one surface of the monomer holder 200 opposite to the bottom surface of the monomer holder 200 to the first rib 210 in the Z-axis direction.

[0113] Additionally, "thickness of the single-unit retainer 200" can be interpreted as the length or thickness of the single-unit retainer 200 in the height direction.

[0114] Reference Figure 5 The second height h2 can be equal to or relatively greater than the first height h1. For example, the ratio of the first height h1 to the thickness of the monomer holder 200 can be in the range of 0.15 to 0.2, and the ratio of the second height h2 to the thickness of the monomer holder 200 can be in the range of 0.2 to 0.3.

[0115] The first rib 210 and the second rib 220 are in the height direction (based on...) Figure 4 The distance in the Z-axis direction can be relatively greater than the first height h1 and the second height h2. For example, the distance between the first rib 210 and the second rib 220 in the height direction can be greater than the sum of the first height h1 and the second height h2.

[0116] For example, the first rib 210 and the second rib 220 are in the height direction (based on Figure 4 The distance in the Z-axis direction can be 0.5 to 0.6 times the thickness of the single-unit retainer 200.

[0117] For example, the first rib 210 and the second rib 220 are in the height direction (based on Figure 4 The distance along the Z-axis can be 2.5 to 4 times the first height h1.

[0118] For example, the first rib 210 and the second rib 220 are in the height direction (based on Figure 4 The distance along the Z-axis can be 1.5 to 3 times the second height h2.

[0119] The notch 102 can be arranged adjacent to a surface defining the bottom of the single-piece holder 200. In the height direction (based on...) Figure 4 The distance from the notch 102 to the first rib 210 in the Z-axis direction can be at least three times the distance from the notch 102 to the second rib 220 in the height direction.

[0120] Reference Figures 4 to 7 According to an exemplary embodiment of the present disclosure, the connecting rib 230 can connect the first rib 210 and the second rib 220, and can be arranged on the corner side of the single-unit retainer 200.

[0121] The connecting rib 230 can be configured such that one end of it is connected to the end of the first rib 210, and the other end opposite to that end is connected to the end of the second rib 220.

[0122] The connecting rib 230 may extend at a preset angle relative to the first rib 210 (about the first rib 210), and for example, the preset angle may exceed 90 degrees or may be 90 degrees.

[0123] Reference Figure 4 and Figure 7 The connecting ribs 230 can be configured in multiple ways (e.g., multiple connecting ribs). The multiple connecting ribs 230 can be arranged symmetrically with respect to the corner line CL of the single retainer 200 and can be parallel to each other.

[0124] For example, two connecting ribs 230 can be arranged at a corner of the single-unit retainer 200. The two connecting ribs 230 can each extend along an imaginary line parallel to the corner line CL of the single-unit retainer 200, and the distance between the connecting ribs 230 and the corner line CL of the single-unit retainer 200 can be the same.

[0125] Multiple connecting ribs 230 can be connected to each other via second ribs 220. In some embodiments, second ribs 220 arranged to intersect with the corner line CL of the unit retainer 200 can connect connecting ribs 230 located on one side relative to the corner line CL of the unit retainer 200 and connecting ribs 230 located on the opposite side based on the corner line CL of the unit retainer 200.

[0126] The sum of the lengths of the first height h1, the second height h2, and the connecting rib 230 can be equal to the thickness of the single retainer 200.

[0127] The first region A1 on the corner portion of the single-unit retainer 200 can be defined as the range / area formed by the first rib 210, the connecting rib 230 and the second rib 220.

[0128] Reference Figures 5 to 7Near the corner of the single retainer 200, the first region A1 can be extended from the first rib 210 to the region located by the second rib 220 via the connecting rib 230.

[0129] Although not shown in the accompanying drawings, the connecting rib 230 may be located in the region corresponding to the recess 102 of the frame portion 100. In some embodiments, the connecting rib 230 may be located on the side of the side surface of the unit retainer 200 facing the recess 102 of the frame portion 100.

[0130] Therefore, as the range of the first region A1 extends along one direction (based on) near the corner of the single-unit holder 200... Figure 4 The amount of adhesive portion 300 applied near the corner of the monomer retainer 200 can be increased (in the Z-axis direction) so that the corner of the monomer retainer 200 and the frame portion 100 can be firmly bonded to each other, or the rigidity of the corner of the monomer retainer 200 or the bend 101 of the frame portion 100 can be further enhanced.

[0131] In some embodiments, even when the amount of adhesive portion 300 applied near the corner of monomer holder 200 increases, connecting rib 230 and second rib 220 can also inhibit the flow of adhesive portion 300 in one direction (e.g., toward the second region A2), thereby reducing / inhibiting leakage of adhesive portion 300 to the outside through the notch 102 of frame portion 100.

[0132] Reference Figure 7 The reinforcing rib 240 according to an exemplary embodiment of the present disclosure is used to enhance the rigidity of the second rib 220 and may be arranged between a surface defining the bottom of the unit retainer 200 and the second rib 220.

[0133] The reinforcing rib 240 can be connected to the side surface portion of the monomer holder 200 and one side of the second rib 220. For example, the reinforcing rib 240 can be connected to the side surface portion of the monomer holder 200 corresponding to the second region A2 (e.g., the outer peripheral surface) and one side of the second rib 220 (e.g., based on...). Figure 7 (the lower surface).

[0134] The reinforcing rib 240 may be arranged on the corner line CL of the single-unit retainer 200. In some embodiments, the reinforcing rib 240 may be formed from one side of the second rib 220 (e.g., based on...). Figure 7 The shape extends along the corner line CL of the individual retainer 200 (the lower side of the retainer).

[0135] The reinforcing rib 240 may be formed in a shape in which the thickness gradually increases from one surface defining the bottom of the monomer holder 200 toward the second rib 220. Here, in some embodiments, the thickness of the reinforcing rib 240 may be interpreted as the height of its protrusion from the side surface portion of the monomer holder 200.

[0136] Reference Figure 2 According to some exemplary embodiments of the present disclosure, the adhesive portion 300 may be arranged between the side surface portion of the monomer retainer 200 and the frame portion 100 to connect the monomer retainer 200 and the frame portion 100 or to enhance the rigidity of the monomer retainer 200 or the frame portion 100.

[0137] The adhesive portion 300 can be positioned / applied to the portion of the side surface of the monomer holder 200 corresponding to the first region A1, and the adhesive portion 300 can be arranged separately from the second region A2.

[0138] Reference Figure 2 The adhesive portion 300 may be on one side based on the rib 201 (e.g., based on...). Figure 2 The adhesive portion 300 is arranged on the side surface of the monomer holder 200 at the upper side, and the thickness of the adhesive portion 300 can be the same as the height at which the rib 201 protrudes from the side surface of the monomer holder 200, or the thickness of the adhesive portion 300 can be relatively thin.

[0139] Therefore, the rib 201 can restrict the movement of the adhesive portion 300 toward the second region A2, thereby reducing / suppressing leakage of the adhesive portion 300 into the notch 102 of the frame portion 100 facing the second region A2.

[0140] The adhesive portion 300 may contact one side of the rib 201 and may be spaced apart from a surface defining the bottom of the monomer holder 200. In some embodiments, the adhesive portion 300 may be arranged in a first region A1 while simultaneously contacting one surface of the first rib 210 (e.g., based on...). Figure 5 The upper surface of the second rib 220, and one surface of the second rib 220 (e.g., based on the upper surface of the second rib 220). Figure 5 (the upper side) and the corner line CL of the connecting rib 230 facing the single-unit retainer 200 are in surface contact.

[0141] Reference Figure 1 and Figure 2 According to an exemplary embodiment of the present disclosure, the cover portion 400 can cover the cell holder 200 and the battery cell BC together with the frame portion 100.

[0142] The battery cell BC installed in the cell holder 200 can be located inside the cover portion 400 and the frame portion 100, and can be insulated or heat-insulated from the external environment.

[0143] Reference Figure 2 According to an exemplary embodiment of this disclosure, the fixed portion 500 can be in the vertical direction (based on...) Figure 2 It is assembled onto the cell holder 200 to secure the battery cell BC while protecting the battery cell BC from external influences.

[0144] The upper part of the corresponding battery cell BC can be assembled to the fixing part 500, and the lower part of the battery cell BC can be assembled to the cell retainer 200. For example, the upper part of the battery cell BC and the fixing part 500 can be fixed to each other by adhesive or shrink-fitting.

[0145] The fixed portion 500 may include a busbar. For example, the fixed portion 500 may be configured as a busbar, or the busbar may be arranged between the fixed portion 500 and the cover portion 400.

[0146] Reference Figure 2 According to an exemplary embodiment of the present disclosure, the cooling portion 600 may surface contact a surface defining the bottom of the cell holder 200 and may cool the cell holder 200 and the battery cell BC housed in the cell holder 200.

[0147] For example, the cooling section 600 can be formed in various shapes that can cool the battery pack 1, such as a shape that has cooling channels through which refrigerant, air, etc. can flow.

[0148] In the following, some operating principles and effects of the battery pack 1 according to exemplary embodiments of the present disclosure will be described.

[0149] Reference Figure 1 and Figure 2 Multiple battery cells BC can be mounted on the cell holder 200. The multiple battery cells BC mounted in the cell holder 200 can be electrically connected to each other.

[0150] After multiple battery cells BC are mounted on the cell holder 200, the fixing part 500 can be assembled on the upper part of the cell holder 200, thereby stably fixing the battery cells BC between the cell holder 200 and the fixing part 500.

[0151] The frame portion 100, which is formed in the shape of a square frame, can cover the side surface of the unit holder 200, the cover portion 400, which is in the shape of a plate, can cover the upper surface of the fixing portion 500, and further, the cooling portion 600 can cover the lower surface of the unit holder 200.

[0152] In this way, the outer peripheral surfaces of the cell holder 200 and the fixing part 500, which are assembled together to accommodate multiple battery cells BC, can be surrounded by the cover part 400, the frame part 100 and the cooling part 600, thereby providing thermal insulation, insulation or protection of the battery cells BC from external influences.

[0153] In the battery pack 1 according to an exemplary embodiment of the present disclosure, the adhesive portion 300 may be arranged between the cell retainer 200 and the frame portion 100 to fix the cell retainer 200 and the frame portion 100 to each other and / or enhance the rigidity of the cell retainer 200 or the frame portion 100.

[0154] The adhesive portion 300 may be fluid and thus may flow toward the cooling portion 600 due to external heat sources, external impacts, gravity or other reasons.

[0155] For example, the adhesive portion 300 may flow on the side surface of the cell holder 200 for the aforementioned reasons and may be discharged through the recess 102 formed in the frame portion 100, which may degrade the structural stability of the battery pack 1 or have a negative impact on the surrounding components of the battery pack 1.

[0156] Reference Figures 4 to 7 The monomer retainer 200 according to an exemplary embodiment of the present disclosure may include ribs 201 on its outer peripheral surface to reduce / inhibit downward flow of the adhesive portion 300.

[0157] In some embodiments, the rib 201 can divide the outer peripheral surface of the monomer holder 200 into a second region A2 facing the notch 102 and a first region A1 spaced apart from the second region A2, and the adhesive portion 300 can be positioned / applied only on the first region A1.

[0158] The height of the rib 201 protruding from the outer peripheral surface of the monomer retainer 200 can be relatively greater than the thickness of the adhesive portion 300. Therefore, the adhesive portion 300 positioned / applied on the first region A1 can be restricted to move toward the second region A2 by the jaw portion formed by the rib 201, thereby inhibiting the adhesive portion 300 from being discharged to the outside through the notch 102.

[0159] In some embodiments, the area of ​​the first region A1 may be expanded at the corner portion of the monomer retainer 200 or frame portion 100 where further reinforcement may be needed by means of the connecting rib 230 and the second rib 220, thereby inhibiting the adhesive portion 300 from being discharged to the outside while improving the reinforcement performance of the adhesive portion 300 near the corner.

[0160] By including ribs 201 that divide the outer peripheral surface of the cell holder 200 for accommodating the battery cell BC into different regions, the battery pack 1 according to an exemplary embodiment of the present disclosure can have the effect of mitigating the outward leakage of the adhesive portion 300 located between the cell holder 200 and the frame portion 100.

[0161] This invention can be applied to various types of electric devices that use batteries.

[0162] Electric devices according to an embodiment of the present invention may include electric vehicles, hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), electric bicycles, electric scooters, electric golf carts, and other vehicles that can use battery packs as a fuel source.

[0163] An electric device according to an embodiment of the present invention may include: an electric power device including an energy storage system using batteries; and machines and equipment associated with the energy storage device.

[0164] An electric device according to an embodiment of the present invention may include a power tool, which may include metal cutting power tools, grinding power tools, assembly power tools and railway power tools. An electric device according to an embodiment of the present invention may also include any battery-powered motor-driven machine, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer.

[0165] An electric device according to an embodiment of the present invention may include any battery-powered application product, such as mobile phones, tablets, laptops, wearable devices, electric toys, mobile electric toys, game consoles, ships, airplanes, spacecraft, drones, and robots.

[0166] Although the present disclosure has been described above with the aid of exemplary embodiments and drawings, the present disclosure is not limited thereto, and various modifications and variations are possible for those skilled in the art within the scope of the technical concept of the present disclosure and the scope of the described patent claims.

[0167] According to an embodiment, by including ribs that divide the outer peripheral surface of the cell holder for accommodating the cell into different regions, the battery pack can have the effect of reducing the outward leakage of the adhesive portion located between the cell holder and the frame portion.

[0168] However, the effects that can be obtained through this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the description of the technology other technical effects not mentioned.

[0169] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for limiting purposes. The description of features or aspects within each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope defined by the appended claims.

Claims

1. A battery pack, the battery pack comprising: A single battery cell has two ends along the height direction; A cell holder, in which the battery cell is housed; The frame portion covers the side surface portion of the monomer retainer; An adhesive portion is arranged between the monomer retainer and the frame portion; as well as The rib extends along the outer periphery of the side surface portion of the monomer holder and divides the side surface portion of the monomer holder into a first region and a second region spaced apart from each other along the height direction.

2. The battery pack according to claim 1, in, The rib includes: The first rib extends along the outer periphery of the monomer holder; and The second rib is spaced apart from the first rib by a predetermined gap in the height direction, wherein the second rib is arranged adjacent to a surface defining the bottom of the monomer holder.

3. The battery pack according to claim 2, in, The monomer retainer includes at least one corner, and the second rib is disposed on the at least one corner of the monomer retainer.

4. The battery pack according to claim 3, in, The second rib is symmetrical with respect to the line forming at least one corner of the monomer holder.

5. The battery pack according to claim 3, in, The first rib is spaced apart from the line forming at least one corner of the monomer holder.

6. The battery pack according to claim 2, in, The rib also includes: The connecting rib has two ends that are respectively connected to the end of the first rib and the end of the second rib, and extends relative to the first rib at a predetermined angle.

7. The battery pack according to claim 6, in, The connecting ribs are configured as multiple connecting ribs, which are arranged symmetrically with respect to the lines forming the corners of the single-unit retainer.

8. The battery pack according to claim 6, in, The preset angle is equal to or greater than 90 degrees.

9. The battery pack according to claim 3, in, The distance from the other surface of the monomer holder opposite to the first surface to the first rib in the height direction is greater than or equal to the distance from the first surface of the monomer holder to the second rib in the height direction.

10. The battery pack according to claim 2, in, The preset gap is equal to or greater than the distance from one surface of the single-unit retainer to the second rib in the height direction.

11. The battery pack according to claim 1, in, The adhesive portion contacts the rib and is spaced apart from a surface that defines the bottom of the monomer holder.

12. The battery pack according to claim 2, in, The first region is spaced apart from the surface defining the bottom of the monomer holder, and the second region is located between the first region and the surface of the monomer holder. The adhesive portion is located on the first region.

13. A battery pack, the battery pack comprising: A single battery cell has two ends along the height direction; A cell holder that houses the battery cell, and the cell holder includes at least one corner; The frame portion covers the side surface portion of the single-unit retainer and has a curved portion formed in the region corresponding to the at least one corner; as well as The rib extends along the outer periphery of the side surface portion of the monomer holder and divides the side surface portion of the monomer holder into a first region and a second region spaced apart from each other along the height direction.

14. The battery pack according to claim 13, in, The rib includes: The first rib extends along the outer periphery of the monomer holder; and The second rib is spaced apart from the first rib by a predetermined gap in the height direction. The second rib is arranged adjacent to a surface that defines the bottom of the monomer holder.

15. The battery pack according to claim 14, in, The second rib is arranged at at least one corner of the monomer retainer.

16. The battery pack according to claim 14, in, The rib also includes: The connecting rib has two ends that are respectively connected to the end of the first rib and the end of the second rib, and extends relative to the first rib at a predetermined angle.

17. The battery pack according to claim 16, in, The connecting ribs are configured as a plurality of connecting ribs, which are arranged symmetrically with respect to the line forming at least one corner of the single-unit retainer.

18. The battery pack according to claim 16, in, A notch is formed on the side of the frame portion adjacent to the curved portion, thereby enabling communication between the internal and external spaces of the frame portion. The connecting rib is located in the region corresponding to the notch.

19. The battery pack according to claim 18, in, The notch is arranged adjacent to the surface defining the bottom of the monomer holder, and The distance from the notch to the first rib in the height direction is at least three times the distance from the notch to the second rib in the height direction.

20. The battery pack according to claim 15, in, The rib also includes: A reinforcing rib is disposed between the surface defining the bottom of the monomer holder and the second rib, and is connected to the outer peripheral surface of the monomer holder and one side of the second rib.

21. An electric device comprising a battery pack according to any one of claims 1 to 20.

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