Battery case, battery pack and method for producing battery pack

Abstract

A battery case, a battery pack, and a method for manufacturing the battery pack are provided. The battery case may include: a first case; a second housing fastened and coupled to the first housing by a plurality of fastening members; a vibration absorbing member in the plurality of fastening members and configured to absorb vibration or impact applied to the plurality of fastening members; and a coupling member adjacent to the vibration absorbing member and configured to prevent detachment of the vibration absorbing member and couple the first housing and the second housing.

Description

[0001] This application claims priority and benefit to Korean Patent Application No. 10-2024-0125941, filed on September 13, 2024, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. Technical Field

[0002] Embodiments of this disclosure relate to battery casings, battery packs, and methods for manufacturing battery packs. Background Technology

[0003] Unlike primary batteries, which are not designed for charging, secondary batteries are designed for discharging and recharging. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptops, digital cameras, and camcorders. High-capacity secondary batteries are widely used as power sources for driving motors (such as those in hybrid or electric vehicles) and for energy storage. A secondary battery includes an electrode assembly containing positive and negative electrodes, a housing that houses the electrode assembly, and terminal portions connected to the electrode assembly.

[0004] In the case of a battery pack comprising multiple secondary batteries, a common method of casing is to form two or more components from a plastic material with good formability, and to protect the multiple battery cells housed within the casing by fastening the two or more components via multiple fastening members. Such fastening members are typically formed in load-bearing areas. Because the casing is made of plastic, the fastening members of the casing may be easily damaged if subjected to force (e.g., when subjected to force).

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

[0006] One or more aspects of this disclosure relate to a battery housing, a battery pack, and a method of manufacturing a battery pack, the vibration absorbing member absorbing vibrations or impacts applied to a plurality of fastening components.

[0007] However, this disclosure is not limited to the foregoing aspects. 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 practicing the disclosed embodiments. Therefore, those skilled in the art will clearly understand this disclosure from the description thereof.

[0008] An insulating member according to one or more embodiments of the present disclosure is a battery housing that accommodates (e.g., includes) a plurality of battery cells and may include: a first housing; a second housing fastened and coupled to the first housing by a plurality of fastening members; a vibration absorbing member disposed in the plurality of fastening members and absorbing vibrations or impacts applied to the plurality of fastening members; and a coupling member configured adjacent to the vibration absorbing member to (e.g., configured to) prevent the vibration absorbing member from detaching and to couple the first housing and the second housing.

[0009] In one or more embodiments, the connecting member may be a protrusion formed on the first housing and inserted into the vibration absorbing member.

[0010] In one or more embodiments, the connecting member may be a screw that penetrates the second housing, the vibration absorbing member, and the first housing and is threaded into the second housing, the vibration absorbing member, and the first housing.

[0011] In one or more embodiments, the screw may be a self-tapping screw.

[0012] In one or more embodiments, the second housing may include a receiving groove for receiving (e.g., containing) a vibration-absorbing member.

[0013] In one or more embodiments, the vibration absorbing member may be spaced apart from and / or separated from the receiving groove by a predetermined distance.

[0014] A battery pack according to one or more embodiments of the present disclosure may include: a plurality of battery cells; and a battery housing configured to house the plurality of battery cells, wherein the battery housing may include: a first housing; a second housing fastened and coupled to the first housing by a plurality of fastening members; a vibration absorbing member disposed in the plurality of fastening members and configured to absorb vibrations or impacts applied to the plurality of fastening members; and a coupling member disposed adjacent to the vibration absorbing member and configured to prevent the vibration absorbing member from detaching and to couple the first housing and the second housing.

[0015] In one or more embodiments, the connecting member may be a protrusion formed on the first housing and inserted into the vibration absorbing member (e.g., inserted into the vibration absorbing member).

[0016] In one or more embodiments, the coupling member may be a screw located in the second housing, the vibration absorbing member, and the first housing (e.g., penetrating the second housing, the vibration absorbing member, and the first housing) and threaded into them (e.g., threaded into the second housing, the vibration absorbing member, and the first housing).

[0017] In one or more embodiments, the screw may be a self-tapping screw (e.g., a self-tapping screw).

[0018] In one or more embodiments, the second housing may have (including) a receiving groove configured to accommodate a vibration-absorbing member.

[0019] In one or more embodiments, the vibration absorbing member may be spaced apart from and / or separated from the receiving groove (e.g., spaced apart and / or separated by a predetermined distance).

[0020] A method for manufacturing a battery pack according to one or more embodiments of the present disclosure may include the following steps: manufacturing a first housing; manufacturing a second housing configured to be joined to the first housing by a plurality of fastening members; housing a plurality of battery cells in the second housing; disposing a vibration absorbing member in the plurality of fastening members, the vibration absorbing member being configured to absorb vibrations or impacts applied to the plurality of fastening members; setting a connecting member for preventing the vibration absorbing member from detaching adjacent to the vibration absorbing member; and joining the first housing and the second housing by the connecting member.

[0021] In one or more embodiments, the step of combining the first housing and the second housing may include fitting a protrusion in the first housing into the vibration-absorbing member.

[0022] In one or more embodiments, the step of joining the first housing and the second housing may include threading a screw through the second housing, the vibration-absorbing member, and the first housing.

[0023] In one or more embodiments, the threading step may include threading a self-tapping screw through the second housing, the vibration-absorbing member, and the first housing.

[0024] In one or more embodiments, the step of manufacturing the second housing may include forming a receiving groove in the second housing for accommodating the vibration absorbing member.

[0025] In one or more embodiments, the step of placing the vibration absorbing member in a plurality of fastening members may include setting the vibration absorbing member to be spaced apart and / or separated from the receiving groove (e.g., spaced apart and / or separated by a predetermined distance).

[0026] According to one or more embodiments of the present disclosure, a vibration-absorbing member is provided to absorb vibrations or impacts applied to a plurality of fastening components, thereby preventing damage to the battery pack housing from vibrations or impacts transmitted from the outside.

[0027] According to one or more embodiments of this disclosure, the coupling member is configured adjacent to the vibration absorbing member to couple the first housing and the second housing, thereby maintaining the alignment of the vibration absorbing member and preventing the vibration absorbing member from disengaging.

[0028] According to one or more embodiments of this disclosure, if a self-tapping screw is used as a connecting member (e.g., when a self-tapping screw is used as a connecting member), a strong fastening force between the threads of the self-tapping screw and the housing can be ensured because byproducts of cutting during tapping are mixed into the threads of the self-tapping screw and fastened to the housing made of plastic. Attached Figure Description

[0029] The accompanying drawings illustrate one or more embodiments of the present disclosure and further describe aspects and features of the disclosure together with the detailed description thereof. Therefore, the present disclosure should not be construed as limited to the drawings: Figure 1 This is a schematic diagram illustrating a cylindrical secondary battery according to one or more embodiments; Figure 2 This is a schematic diagram illustrating a prism-shaped secondary battery according to one or more embodiments; Figure 3 and Figure 4 This is a schematic diagram illustrating a pouch-type (type) secondary battery according to one or more embodiments; Figures 5A to 5D This is a diagram illustrating a battery casing from the prior art; Figure 6A and Figure 6B This is a detailed view of the second housing, illustrating a prior art battery housing; Figure 7 This is a diagram showing the shape of a fastening component for a prior art battery casing; Figure 8 This is a diagram showing the screw fastening components of a prior art battery casing; Figure 9 This is a diagram illustrating the shape of a fastening component for a battery housing according to one or more embodiments of the present disclosure; Figure 10 This is a diagram illustrating the screw fastening components of a battery housing according to one or more embodiments of the present disclosure; and Figure 11 This is a flowchart illustrating a method for manufacturing a battery pack according to one or more embodiments of the present disclosure. Detailed Implementation

[0030] To fully understand the structure and effects of this disclosure, one or more embodiments of this disclosure will be described in more detail with reference to the accompanying drawings. Before description, it should be noted that the terms or words used in this specification and claims should not be construed as limited to their ordinary or dictionary meanings, but should be understood to have meanings and concepts consistent with the spirit of this disclosure based on the principle that a person skilled in the art can appropriately define the concept of each term. Therefore, since the embodiments described in this specification and the structures shown in the drawings are merely examples of this disclosure and do not cover all the technical ideas of this disclosure, it should be understood that one or more suitable changes and modifications can be made at the time of filing this application, and thus one or more embodiments can be implemented in one or more suitable forms.

[0031] Unless otherwise noted, singular expressions such as “a,” “one,” or “the” may include plural expressions. For example, the phrase “A or B” may indicate “A but not B,” “B but not A,” and “A and B.” It will also be understood that when the terms “comprising / including,” “having,” and variations thereof are used herein, it indicates the presence of the stated features, integrals, steps, operations, elements, components, and / or groups thereof, but does not preclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Furthermore, the terms “comprising / including,” “having / possessing,” and variations thereof, or other similar terms, include or support the terms “consisting of” and “substantially consisting of,” indicating the presence of the stated features, integrals, steps, operations, elements, and / or components, while other features, integrals, steps, operations, elements, components, and / or groups thereof are absent or substantially absent. Furthermore, in this context, "consistent with substantially" indicates that any additional components (or parts) will not substantially affect the chemical, physical, optical, or electrical properties of the insulating members (i.e., the battery casing) and / or the battery pack.

[0032] For ease of understanding of this disclosure, the drawings are not to scale, and the dimensions of some components may be exaggerated. It should be noted that the same reference numerals denote the same components in different embodiments.

[0033] Referring to two compared elements, features, etc., as "identical" means that they are "substantially identical." Therefore, the phrase "substantially identical" can include what is considered a low deviation in the art, for example, 5% or less. Any parameter being uniform in a given region can mean that it is uniform from an average perspective.

[0034] Although terms such as “first” and / or “second” are used to describe one or more suitable components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another. Therefore, unless specifically stated to the contrary, a first component may be referred to as a second component without departing from the teachings of the exemplary embodiments.

[0035] Throughout this specification, unless otherwise stated, each element may be singular or plural.

[0036] The arrangement of any component "above (or below)" or "on (or under)" a component can mean that any component is arranged to contact the upper (or lower) surface of that component, and that other components may be placed between that component and any components arranged on (or below) that component.

[0037] It will be understood that when a component is referred to as “connected,” “joined,” or “engaged” to another component, that component can not only be “connected,” “joined,” or “engaged” to said other component directly, but also indirectly “connected,” “joined,” or “engaged” to said other component with other components situated between them.

[0038] As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. The use of “may” when describing embodiments of this disclosure refers to “one or more embodiments of this disclosure”. Expressions such as “at least one of…” and “one or more…” preceding / following a list of elements modify the entire list of elements, rather than individual elements within that list.

[0039] Throughout this specification, unless otherwise stated, when “A and / or B” is mentioned, it means A, B, or A and B. In some embodiments, unless specifically stated to the contrary, when “C to D” is mentioned, it means C or greater and D or less.

[0040] When phrases such as “at least one of A, B and C (species / beings)”, “at least one of A, B or C (species / beings)”, “at least one of the group selected from A, B and C (species / beings)” or “at least one of A, B and C (species / beings)” are used to specify a list of elements A, B and C, the phrase can refer to any and all suitable combinations.

[0041] The term “use” may be considered synonymous with the term “utilize”. As used herein, the terms “basically,” “about,” and similar terms are used as approximate terms rather than terms of degree and are intended to explain the inherent variations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art.

[0042] It will be understood that although the terms first, second, third, etc., may be used herein to describe one or more suitable elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or portion from another element, component, region, layer, or portion. Therefore, without departing from the teachings of the exemplary embodiments, the first element, first component, first region, first layer, or first portion discussed below may be referred to as a second element, second component, second region, second layer, or second portion.

[0043] For ease of interpretation when describing the relationship between one element or feature and another element(s) as shown in the accompanying drawings, spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” may be used herein. It will be understood that, in addition to the orientations depicted in the drawings, spatial relative positions are intended to encompass different orientations of the device in use or operation. For example, if the device in the drawings is flipped, any element described as “below” or “under” another element will subsequently be oriented “above” or “above” another element. Thus, the term “below” can encompass both upward and downward directions.

[0044] In the context of this application and unless otherwise defined, the term “use” and its variations may be considered synonymous with the term “utilize” and its variations, respectively.

[0045] The terminology used herein is for the purpose of describing embodiments of this disclosure and is not intended to limit the disclosure.

[0046] Secondary batteries Secondary batteries can be categorized into coin-type, cylindrical, prismatic, and pouch-type. Before describing embodiments of this disclosure, cylindrical and prismatic secondary batteries will be described in a rough manner, as this disclosure is essentially applicable to both cylindrical and prismatic secondary batteries.

[0047] Figures 1 to 4 This is a schematic diagram illustrating a secondary battery according to an implementation example. Figure 1 A cylindrical secondary battery can be shown. Figure 2 Prismatic (or similar) secondary batteries can be shown. Figure 3 and Figure 4 A pouch-type (or similar) secondary battery can be shown. (See reference...) Figures 1 to 4The secondary battery may include an electrode assembly 40 and a housing 50. In the electrode assembly 40, a separator 30 is disposed between a first electrode plate 10 and a second electrode plate 20. The electrode assembly 40 is embedded (or housed) in the housing 50. The first electrode plate 10, the second electrode plate 20, and the separator 30 may be immersed in an electrolyte. Figure 1 As shown, the secondary battery may include a sealing member 60 of the sealed housing 50. Furthermore, in Figure 2 In this secondary battery, a first electrode lead connector 11, a first electrode terminal 12, a second electrode lead connector 21, and a second electrode terminal 22 may be included. For example... Figure 3 and Figure 4 As shown, the secondary battery may include electrode terminals 70, which serve as electrical channels for directing current generated in the electrode assembly 40 to the outside (e.g., acting as electrical channels for directing current generated in the electrode assembly 40 to the outside). Electrode terminals 70 may include a first electrode terminal 71 and a second electrode terminal 72.

[0048] The electrode assembly 40 can be formed by winding or stacking a stack comprising a first electrode plate 10, a second electrode plate 20, and a diaphragm 30, each of which is formed in a plate shape or a film shape. In the case of a wound stack, the winding axis of the electrode assembly 40 can be parallel to the length direction of the housing. Furthermore, the electrode assembly 40 can be a stack type (or similar) rather than a wound type (or similar), but in one or more embodiments of this disclosure, the shape of the electrode assembly 40 is not limited. The first electrode plate 10 of the electrode assembly 40 can function as a positive electrode (e.g., it can act as a positive electrode), and the second electrode plate 20 of the electrode assembly 40 can function as a negative electrode (e.g., it can act as a negative electrode), and vice versa.

[0049] The first electrode plate 10 can be formed by applying a first electrode active material (such as graphite or carbon) to a first electrode current collector formed of a metal foil (such as copper, copper alloy, nickel, or nickel alloy). The first electrode plate 10 may include a first electrode terminal (or a first uncoated portion), that is, an area where the first electrode active material is not applied.

[0050] The second electrode plate 20 can be formed by applying a second electrode active material (such as a transition metal oxide) to a second electrode current collector formed of a metal foil (such as aluminum or an aluminum alloy). The second electrode plate 20 may include a second electrode terminal (or a second uncoated portion), that is, an area where the second electrode active material is not applied.

[0051] The diaphragm 30 prevents short circuits between the first electrode plate 10 and the second electrode plate 20 while allowing lithium ions to move between them. For example, the diaphragm 30 may comprise a polyethylene membrane, a polypropylene membrane, or a polyethylene-polypropylene membrane (or may be composed of a polyethylene membrane, a polypropylene membrane, or a polyethylene-polypropylene membrane).

[0052] The above has been referred to Figures 1 to 4 The described multiple secondary batteries can be aggregated to form multiple battery cells and housed in a battery casing. The battery casing according to embodiments of this disclosure may include a support member that supports the hook after it is fastened to the hook hole, and because the hook can be prevented from disengaging due to hook retraction if an impact is applied to the battery pack (e.g., when an impact is applied to the battery pack), the hook and hook hole can be kept fastened. Hereinafter, a battery casing and a method of manufacturing a battery casing according to embodiments of this disclosure are described with reference to the accompanying drawings.

[0053] Refer to this Figures 1 to 4 As an example, multiple secondary batteries can be assembled to form multiple battery cells and housed in a battery casing to form a battery pack.

[0054] Figures 5A to 5D This is a diagram showing a battery casing according to the prior art.

[0055] Reference Figures 5A to 5D , Figure 5A The first housing 1 shown and Figure 5B The second housing 2 shown can be combined to form a battery housing. For example... Figure 5C As shown, the battery management system (BMS) 3 is integrated into the interior of the second housing 2. (As illustrated by...) Figure 5A and Figure 5B The dashed circles in the diagram indicate multiple screws used to attach the battery housing or BMS.

[0056] Figure 5D An enlarged cross-sectional view of the portion where the screw is attached to the second housing 2 is shown. The screw 4 is made of metal and is primarily inserted into the first housing 1 and the second housing 2, which are made of plastic. Therefore, because the relatively hard screw 4 is inserted into the relatively soft first housing 1 and the second housing 2, the first housing 1 and the second housing 2 are easily damaged. For example, because such fastening components are typically formed in load-bearing areas, the fastening components are easily damaged if vibration or impact is applied to them (e.g., when vibration or impact is applied to the fastening components).

[0057] Figure 6A and Figure 6B This is a detailed diagram showing the second housing of a battery housing according to the prior art.

[0058] Figure 6AThe diagram shows that the installation is omitted. Figure 5B The state of the battery cells and components in the second housing 2 of the battery housing according to the prior art is shown.

[0059] Figure 6B Multiple fastening components 5 and 6 are shown, and the first housing 1 and the second housing 2 are fastened and joined together by the multiple fastening components 5 and 6. The multiple fastening components may include shape-fitting fastening components 5 and screw-fitting fastening components 6. Shape-fitting fastening components 5 are components that fasten according to a shape, and screw-fitting fastening components 6 are components that fasten with screws. Therefore, shape-fitting fastening components 5 may have grooves (e.g., fastening slots) for fastening according to their shape, and screw-fitting fastening components 6 may be formed with screw holes for fastening with screws. (See reference...) Figure 7 and Figure 8 The shape of the battery casing according to the prior art is described in more detail for fastening component 5 and screw fastening component 6.

[0060] Figure 7 This is a diagram showing the shape of the fastening component of the battery casing according to the prior art.

[0061] Reference Figure 7 According to the prior art, the shape fastening member 5 of the battery casing can be formed by fitting a protrusion formed in the first casing 1 into a fastening groove formed in the second casing 2. Because this fitting is performed by tightly fitting the protrusion into the fastening groove, the shape fastening member 5 may be easily damaged if vibration or impact is applied to it (e.g., when vibration or impact is applied to it).

[0062] Figure 8 This is a diagram showing the screw fastening components of a battery casing according to the prior art.

[0063] Reference Figure 8 According to the prior art, the screw fastening component 6 of the battery casing can be formed by threading a screw 4 through the screw hole of the first casing 1 and the screw hole of the second casing 2. In this threaded connection, because the screw 4, which is made of metal, is connected to the first casing 1 and the second casing 2, which are both made of plastic, the relatively soft first casing 1 and the second casing 2 may be easily damaged if vibration or impact is applied to the screw fastening component 6 (for example, when vibration or impact is applied to the screw fastening component 6).

[0064] Figure 9 This is a diagram illustrating the shape fastening components of a battery housing according to one or more embodiments of the present disclosure.

[0065] Reference Figure 9A battery housing 100 according to one or more embodiments of the present disclosure includes a first housing 110 and a second housing 120, the second housing 120 being fastened and coupled to the first housing 110 by a plurality of fastening members (e.g., fasteners). Because the first housing 110 and the second housing 120 may have the same construction as the first housing and the second housing described above according to the prior art, except for the construction of the fastening members, detailed illustrations and descriptions thereof are not included or are only briefly repeated.

[0066] A battery housing 100 according to one or more embodiments of the present disclosure may include a vibration absorbing member 130 disposed among a plurality of fastening members and absorbing vibrations or impacts applied to the plurality of fastening members. In one or more embodiments, the vibration absorbing member 130 may be made of elastic rubber or a polymer material.

[0067] According to one or more embodiments of this disclosure, the battery housing 100 may further include a coupling member 140 configured adjacent to the vibration-absorbing member 130 to prevent the vibration-absorbing member 130 from detaching and to couple the first housing 110 and the second housing 120. In one or more embodiments, such as Figure 9 As shown, the connecting member 140 may be a protrusion formed on the first housing 110 and fitted into the vibration absorbing member 130. Such a protrusion is provided on the first housing 110 to keep the vibration absorbing member 130 aligned and prevent the vibration absorbing member 130 from disengaging.

[0068] In one or more embodiments, the second housing 120 may include a receiving groove 121 for receiving a vibration-absorbing member 130. In such embodiments, the vibration-absorbing member 130 may be spaced apart from and / or separated from the receiving groove 121 by a gap A. In such embodiments, the vibration-absorbing member 130 and the receiving groove 121 are not in direct contact with each other, and a gap A exists (or is formed) between the vibration-absorbing member 130 and the receiving groove 121, preventing vibrations or impacts from being transmitted horizontally to the fastening components.

[0069] Figure 10 This is a diagram illustrating the screw fastening components of a battery housing according to one or more embodiments of the present disclosure.

[0070] Reference Figure 10 According to one or more embodiments of the present disclosure, the battery housing 100 includes a first housing 110 and a second housing 120, the second housing 120 being fastened and coupled to the first housing 110 by a plurality of fastening members. Because the first housing 110 and the second housing 120 may have the same construction as the first housing and the second housing described above according to the prior art, except for the construction of the fastening members, detailed illustrations and descriptions thereof are not included or are only briefly described.

[0071] A battery housing 100 according to one or more embodiments of the present disclosure may include a vibration absorbing member 130 disposed among a plurality of fastening members and absorbing vibrations or impacts applied to the plurality of fastening members. In one or more embodiments, the vibration absorbing member 130 may be made of elastic rubber or a polymer material.

[0072] According to one or more embodiments of the present disclosure, the battery housing 100 may further include a coupling member 140' configured adjacent to the vibration-absorbing member 130 to prevent the vibration-absorbing member 130 from detaching and to couple the first housing 110 and the second housing 120. In one or more embodiments, such as Figure 10 As shown, the connecting member 140' can be a screw that penetrates (or extends through) the second housing 120, the vibration absorbing member 130, and the first housing 110 and is threadedly engaged with the second housing 120, the vibration absorbing member 130, and the first housing 110. The threaded engagement can keep the vibration absorbing member 130 aligned and prevent it from disengaging.

[0073] In one or more embodiments, the screw used in the screw fastening component may be a self-tapping screw (e.g., a self-tapping screw). A self-tapping screw can be inserted into an unthreaded object by forming threads through tapping. If the screw used in the screw fastening component is a self-tapping screw (e.g., when the screw used in the screw fastening component is a self-tapping screw), the byproducts cut and removed during tapping become mixed into the threads of the self-tapping screw and tighten to the plastic housing, ensuring a strong fastening force between the threads of the self-tapping screw and the housing.

[0074] In one or more embodiments, the second housing 120 may have a receiving groove 121 for receiving the vibration-absorbing member 130. In such embodiments, the vibration-absorbing member 130 may be spaced apart from the receiving groove 121 and / or separated by a gap A. In such embodiments, the vibration-absorbing member 130 and the receiving groove 121 are not in direct contact, and a gap A exists between the vibration-absorbing member 130 and the receiving groove 121, preventing vibration or impact from being transmitted horizontally to the fastening components.

[0075] Reference Figure 9 and Figure 10 The battery casing 100 described according to one or more embodiments of this disclosure can be used to construct a battery pack by accommodating multiple battery cells. (See also...) Figure 11 A method for manufacturing a battery pack according to one or more embodiments of the present disclosure is described.

[0076] Figure 11 This is a flowchart describing a method for manufacturing a battery pack according to one or more embodiments of the present disclosure.

[0077] Reference Figure 11 A method for manufacturing a battery pack according to one or more embodiments of the present disclosure may include steps S210, S220, S230, S240, S250, and S260.

[0078] Step S210 is the step for manufacturing the first housing.

[0079] Step S220 is a step for manufacturing a second housing that is attached to the first housing by a plurality of fastening components. In one or more embodiments, step S220 may include a step for forming a receiving groove in the second housing for accommodating a vibration-absorbing member.

[0080] Step S230 is a step for housing multiple battery cells in a second housing.

[0081] Step S240 is the step of placing a vibration-absorbing member for absorbing vibrations or impacts applied to the plurality of fasteners in the plurality of fasteners. In one or more embodiments, step S240 may include the step of spaced and / or separating the vibration-absorbing member from the receiving groove by a gap.

[0082] Step S250 is the step of setting the connecting member used to prevent the vibration absorbing member from detaching to be adjacent to the vibration absorbing member.

[0083] Step S260 is the step of joining the first housing and the second housing by means of a connecting member. In one or more embodiments, step S260 may include the step of fitting a protrusion formed in the first housing into the vibration absorbing member. In another embodiment, step S260 may include the step of threading a screw through the second housing, the vibration absorbing member, and the first housing. In one or more embodiments, the threading step may include the step of threading a self-tapping screw through the second housing, the vibration absorbing member, and the first housing.

[0084] A method for manufacturing a battery pack according to one or more embodiments of the present disclosure described herein has been described with reference to the flowcharts presented in the accompanying drawings. For simplicity, the method has been shown and described as a series of blocks; however, the present disclosure is not limited to the order of the blocks, and some blocks may occur in a different order or simultaneously with other blocks shown and described herein. Furthermore, one or more suitable other branches, processes, and block sequences may be implemented to achieve the same or similar results. In some embodiments, not all of the shown blocks may be required to implement the method described herein.

[0085] In reference Figure 11In the description, according to the embodiments of this disclosure, each step can be further divided into additional steps or combined into fewer steps. In some embodiments, some steps may be omitted as needed, and the order of the steps may be changed. In some embodiments, even in the absence of other included content, Figure 9 and Figure 10 The content can also be applied to Figure 11 The content. In some embodiments, Figure 11 The content can be applied to Figure 9 and Figure 10 The content.

[0086] In the following description, materials that can be used in secondary batteries according to one or more embodiments of the present disclosure are described.

[0087] Compounds capable of reversibly inserting and deintercalating lithium (e.g., lithiation intercalation compounds) can be used as positive electrode active materials. For example, one or more of a composite oxide of lithium with a metal selected from cobalt, manganese, nickel, or combinations thereof can be used as positive electrode active materials.

[0088] The composite oxide can be a lithium transition metal composite oxide. Detailed examples of composite oxides may include lithium nickel oxides, lithium cobalt oxides, lithium manganese oxides, lithium iron phosphate compounds, cobalt-free lithium nickel manganese oxides, or combinations thereof.

[0089] For example, a compound represented according to one of the following chemical formulas can be used. Li a A 1-b X b O 2-c D c (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05); Li a Mn 2-b X b O 4-c D c (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05); Li a Ni 1-b-c Co b X c O 2-α D α (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.5, 0<α<2); Li a Ni 1-b- c Mn b X c O 2-α D α(0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.5, 0<α<2); Li a Ni b Co c L 1 d G e O2 (0.90≤a≤1.8, 0≤b≤0.9, 0≤c≤0.5, 0≤d≤0.5, 0≤e≤0.1); Li a NiG b O2 (0.90≤a≤1.8, 0.001≤b≤0.1); Li a CoG b O2 (0.90≤a≤1.8, 0.001≤b≤0.1); Li a Mn 1-b G b O2 (0.90≤a≤1.8, 0.001≤b≤0.1); Li a Mn2G b O4 (0.90≤a≤1.8, 0.001≤b≤0.1); Li a Mn 1-g G g PO4 (0.90≤a≤1.8, 0≤g≤0.5); Li (3-f) Fe2(PO4)3 (0≤f≤2); and Li a FePO4 (0.90≤a≤1.8).

[0090] In the chemical formula, A can be Ni, Co, Mn, or a combination thereof. X can be Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, rare earth elements, or a combination thereof; D can be O, F, S, P, or a combination thereof. G can be Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, or a combination thereof. L 1 It can be Mn, Al, or a combination thereof.

[0091] The positive electrode for a secondary battery may include a current collector and a layer of positive electrode active material formed on the current collector. The positive electrode active material layer may include a positive electrode active material, and may also include a binder and / or a conductive material.

[0092] The content of the positive electrode active material can be from 90 wt% to 99.5 wt% relative to 100 wt% of the positive electrode active material layer. The content of each of the binder and conductive material can be from 0.5 wt% to 5 wt% relative to 100 wt% of the positive electrode active material layer.

[0093] Al can be used as a current collector, but this disclosure is not limited thereto.

[0094] The negative electrode active material may include materials that can reversibly insert / deintercalate lithium ions, lithium metal, lithium metal alloys, materials that can be doped and dedoped for lithium, or transition metal oxides.

[0095] Materials capable of reversibly inserting / deintercalating lithium ions can include carbon-based negative electrode active materials, such as crystalline carbon, amorphous carbon, or combinations thereof. Examples of crystalline carbon can include graphite, such as natural or synthetic graphite. Examples of amorphous carbon can include soft or hard carbon, mesophase pitch carbides, and calcined coke.

[0096] As materials capable of doping and dedoping lithium, either Si-based or Sn-based negative electrode active materials can be used. Si-based negative electrode active materials can be silicon, silicon-carbon composites, or SiO₂. x (0 < x ≤ 2), Si alloys or combinations thereof.

[0097] The silicon-carbon composite can be a composite of silicon and amorphous carbon. According to an embodiment, the silicon-carbon composite may include silicon particles and may have a form in which amorphous carbon is coated on the surface of the silicon particles.

[0098] Silicon-carbon composites may also include crystalline carbon. For example, a silicon-carbon composite may include a core comprising crystalline carbon and silicon particles, and an amorphous carbon coating disposed on the surface of the core.

[0099] The negative electrode for a secondary battery may include a current collector and a layer of negative electrode active material disposed on the current collector. The negative electrode active material layer may include a negative electrode active material, and may also include a binder and / or a conductive material.

[0100] For example, the negative electrode active material layer may include 90 wt% to 99 wt% of negative electrode active material, 0.5 wt% to 5 wt% of binder, and 0 wt% to 5 wt% of conductive material.

[0101] As a binder, non-aqueous binders, aqueous binders, dry binders, or combinations thereof can be used. If an aqueous binder is used as the binder for the negative electrode, the binder for the negative electrode may also include cellulose-based compounds capable of imparting viscosity.

[0102] As a current collector for the negative electrode, it can be selected from nickel foil, stainless steel foil, titanium foil, nickel foam, copper foam, a polymer matrix coated with a conductive metal, and combinations thereof.

[0103] Electrolytes used in secondary batteries may include non-aqueous organic solvents and lithium salts.

[0104] Non-aqueous organic solvents can act as a medium through which ions involved in the electrochemical reactions of a battery can move.

[0105] Non-aqueous organic solvents can be carbonate solvents, ester solvents, ether solvents, ketone solvents, alcohol solvents, aprotic solvents, or combinations thereof. As non-aqueous organic solvents, carbonate solvents, ester solvents, ether solvents, ketone solvents, alcohol solvents, or aprotic solvents can be used alone, or two or more types can be mixed and used.

[0106] In addition, if carbonate solvents are used, cyclic carbonates and chain carbonates can be mixed and used.

[0107] Depending on the type of secondary battery, a separator may be present between the positive and negative electrodes. Polyethylene, polypropylene, and polyvinylidene fluoride, or multilayers with two or more layers, can be used as separators.

[0108] The membrane may include a porous substrate and a coating layer, comprising organic matter, inorganic matter or a combination thereof, disposed on one or both sides (opposite sides) of the porous substrate.

[0109] Organic materials may include polyvinylidene fluoride polymers or (meth)acrylic acid polymers.

[0110] Inorganic materials may include inorganic particles selected from Al2O3, SiO2, TiO2, SnO2, CeO2, MgO, NiO, CaO, GaO, ZnO, ZrO2, Y2O3, SrTiO3, BaTiO3, Mg(OH)2, boehmite, and combinations thereof, but this disclosure is not limited thereto.

[0111] Organic and inorganic materials can be in the form in which organic and inorganic materials are mixed in a coating layer or in the form of a coating layer including organic materials and a coating layer including inorganic materials stacked together.

[0112] Terms such as “basically,” “about,” and “approximately” are used as relative terms rather than as terms of degree and are intended to explain the inherent biases of measured or calculated values ​​that would be recognized by one of ordinary skill in the art. They may include the stated value and an acceptable range of deviation as determined by one of ordinary skill in the art, taking into account the limitations and errors associated with the measurement of the quantity. For example, “about” may refer to one or more standard deviations, or ±30%, ±20%, ±10%, or ±5% of the stated value.

[0113] The numerical ranges disclosed herein include, and are intended to disclose, all included subranges with the same numerical precision. For example, the range “1.0 to 10.0” includes all subranges having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Therefore, the applicant reserves the right to amend this specification (including the claims) to expressly enumerate any subranges included within the ranges expressly enumerated herein.

[0114] The battery manufacturing apparatus, battery management system (BMS) apparatus, and / or any other related apparatus or components according to embodiments of the present disclosure described herein can be implemented using any suitable hardware, firmware (e.g., application-specific integrated circuits), software, or a combination of software, firmware, and hardware. For example, components of the apparatus can be formed on a single integrated circuit (IC) chip or separate IC chips. Furthermore, components of the apparatus can be implemented on a flexible printed circuit film, tape-and-carrier package (TCP), printed circuit board (PCB), or formed on a substrate. Additionally, components of the apparatus can be processes or threads running on one or more processors in one or more computing devices, executing computer program instructions, and interacting with other system components to perform the functions described herein. The computer program instructions are stored in memory, which can be implemented in a computing device using a standard memory device such as random access memory (RAM). The computer program instructions can also be stored in other non-transitory computer-readable media such as CD-ROMs or flash drives. Furthermore, those skilled in the art will recognize that, without departing from the scope of this disclosure, the functionality of computing devices can be combined or integrated into a single computing device, or the functionality of a particular computing device can be distributed across one or more other computing devices.

[0115] The description of a feature or aspect within each embodiment should generally be considered applicable to other similar features or aspects in other embodiments.

[0116] Although this disclosure has been described herein with reference to limited embodiments and accompanying drawings, this disclosure is not limited to these embodiments. Those skilled in the art to which this disclosure pertains can modify and alter this disclosure within the spirit of the disclosure and the equivalents of the appended claims.

Claims

1. A battery housing configured to accommodate a plurality of battery cells, the battery housing comprising: First shell; The second housing is fastened and attached to the first housing by a plurality of fastening components; A vibration absorbing member is located in the plurality of fastening members and is configured to absorb vibrations or impacts applied to the plurality of fastening members; as well as A connecting member is adjacent to the vibration absorbing member and is configured to prevent the vibration absorbing member from detaching and to connect the first housing and the second housing.

2. The battery casing according to claim 1, wherein, The connecting member is a protrusion located on the first housing and within the vibration absorbing member.

3. The battery casing according to claim 1, wherein, The connecting member is a screw located in the second housing, the vibration absorbing member, and the first housing, and is threaded into the second housing, the vibration absorbing member, and the first housing.

4. The battery casing according to claim 3, wherein, The screw is a self-tapping screw.

5. The battery casing according to claim 1, wherein, The second housing has a receiving groove configured to accommodate the vibration absorbing member.

6. The battery casing according to claim 5, wherein, The vibration absorbing component is spaced apart from the receiving groove.

7. A battery pack, the battery pack comprising: Multiple battery cells; as well as A battery casing housing the plurality of battery cells, the battery casing comprising: First shell; The second housing is fastened and attached to the first housing by a plurality of fastening components; A vibration-absorbing member, located within the plurality of fastening components, and configured to absorb vibrations or impacts applied to the plurality of fastening components; and A connecting member is adjacent to the vibration absorbing member and is configured to prevent the vibration absorbing member from detaching and to connect the first housing and the second housing.

8. The battery pack according to claim 7, wherein, The connecting member is a protrusion located on the first housing and within the vibration absorbing member.

9. The battery pack according to claim 7, wherein, The connecting member is a screw located in the second housing, the vibration absorbing member, and the first housing, and is threaded into the second housing, the vibration absorbing member, and the first housing.

10. The battery pack according to claim 9, wherein, The screw is a self-tapping screw.

11. The battery pack according to claim 7, wherein, The second housing has a receiving groove configured to accommodate the vibration absorbing member.

12. The battery pack according to claim 11, wherein, The vibration absorbing component is spaced apart from the receiving groove.

13. A method for manufacturing a battery pack, the method comprising the following steps: Manufacturing the first casing; A second housing is manufactured, the second housing being configured to be attached to the first housing by a plurality of fastening components; Multiple battery cells are housed in the second housing; Vibration absorbing members are disposed in the plurality of fastening members, and the vibration absorbing members are configured to absorb vibrations or impacts applied to the plurality of fastening members; The connecting member used to prevent the vibration absorbing member from detaching is positioned adjacent to the vibration absorbing member; as well as The first housing and the second housing are joined together by the connecting member.

14. The method for manufacturing a battery pack according to claim 13, wherein, The step of combining the first housing and the second housing includes fitting a protrusion in the first housing into the vibration-absorbing member.

15. The method for manufacturing a battery pack according to claim 13, wherein, The step of combining the first housing and the second housing includes threading a screw through the second housing, the vibration-absorbing member, and the first housing.

16. The method for manufacturing a battery pack according to claim 15, wherein, The threading step includes threading a self-tapping screw through the second housing, the vibration-absorbing member, and the first housing.

17. The method for manufacturing a battery pack according to claim 13, wherein, The step of manufacturing the second housing includes forming a receiving groove in the second housing for accommodating the vibration absorbing member.

18. The method for manufacturing a battery pack according to claim 17, wherein, The step of placing the vibration absorbing member in the plurality of fastening components includes setting the vibration absorbing member to be spaced apart from the receiving groove.

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