Housing assembly, battery cell, battery and electrical device

Abstract

As a housing assembly (21), battery cell (20), battery (100) and electric device, the housing assembly (21) includes a housing (211) and a pole (212), a via hole (211a) is installed in the housing (211), and the pole (212) includes a main body (201), a connecting part (202), and a bending part (203), the main body (201) is located inside the housing (211), the connecting part (202) penetrates the via hole (211a) and connects the main body (201) and the bending part (203), the bending part (203) is located outside the housing (211), and the bending part (203) has an end near the connecting part (202), and a concave part (212a) is installed on one side of the end near the housing (211).

Description

Technology Field

[0001] Cross-reference regarding related applications

[0002] The present application is filed based on a Chinese patent application with application number 202420003437.X and filing date January 2, 2024, and claims priority to said Chinese patent application, and the entire contents of said Chinese patent application are incorporated into the present application by means of citation.

[0003] This application relates to the field of battery technology, and in particular to housing assemblies, battery cells, batteries, and electrical devices. Background Technology

[0004] In recent years, new energy vehicles have made rapid progress, and in the field of electric vehicles, power batteries play an irreplaceable and critical role as the power source. A battery consists of a case and multiple battery cells housed within it. As a core component of new energy vehicles, the battery faces relatively high demands regarding both safety and service life. However, when manufacturing battery cells, the electrodes are secured to the housing using a riveting flange method; consequently, forming the electrode flange during this process is relatively difficult, and the reliability after flanging is relatively low.

[0005] The embodiments of the present application provide a housing assembly, a battery cell, a battery, and an electric device that can effectively lower the difficulty of forming the pole flange and improve the reliability after the pole is flanged.

[0006] In a first aspect, an embodiment of the present application provides a housing assembly, which comprises: a housing in which a via hole is installed; and a pole including a main body, a connecting part and a bending part; wherein the main body is located inside the housing, the connecting part penetrates the via hole and connects the main body and the bending part, and the bending part has an end near the connecting part, and a recess is installed on one side of the end near the housing.

[0007] In the technical solution described above, the pole is installed to include a main body, a connecting part, and a bending part, and a recess is installed at the end of the bending part near the connecting part, and the recess is located on one side of the end near the housing. When the pole is riveted flanged to form the bending part and the connecting part, the recess can reduce the effect of the material compression on the formation of the bending part by the bending of the pole, and also provide a guide action, thereby lowering the difficulty of forming the bending part in the pole. At the same time, the recess can form a relatively small bending angle between the bending part and the connecting part, that is, the bending part can be nearly parallel to the housing, which is advantageous for improving the clamping force of the bending part on the sealing member in the via hole and improving the reliability of the battery cell.

[0008] In some embodiments of the present application, the depth of the concave portion is T, and the thickness of the folded portion is H, where 0 <T / H≤0.7이다. 해당 기술방안에서, 오목부의 깊이 크기 및 절곡부의 두께 크기의 비율을 0.7 이하의 범위 내로 설치하여, 오목부가 적절한 깊이를 가지도록 함으로써, 극주의 리벳팅 플랜지 난이도를 효과적으로 낮출 수 있고, 극주를 리벳팅 플랜지한 후 신뢰적인 강도를 가지도록 할 수 있어, 극주의 신뢰성을 향상시키는 데 유리하다.

[0009] In some embodiments of the present application, the housing has a first wall, a via hole is installed in the first wall, the main body and the connecting part are enclosed to form a receiving groove, a reference plane perpendicular to the first wall is formed, and the projection of the concave part on the reference plane is located within the projection of the receiving groove on the reference plane.

[0010] In the technical solution described above, a reference plane perpendicular to the first wall is created, and the projection of the concave portion on the reference plane is positioned within the projection of the receiving groove on the reference plane. By using this structure, the strength weakened by installing the concave portion in the bent portion after mounting the cover plate in the receiving groove can be compensated, which is advantageous for improving the strength at the location where the end of the bent portion is positioned, and thus improves the structural stability of the housing assembly.

[0011] In some embodiments of the present application, the housing assembly further comprises a sealing member, the sealing member is installed by being fitted into a connection, and some is located between a bend and the housing. In the technical solution, the bend formed at the riveting flange of the pole can clamp the sealing member to the housing, thereby allowing the sealing member to seal the gap between the via hole and the connection, thereby reducing the risk of leakage in the housing assembly.

[0012] In some embodiments of the present application, the concave portion includes one of a polygon, a circular polygon, and an arc shape. In the technical solution, by installing the concave portion to include one of a polygon, a circular polygon, and an arc shape, the concave portion can have various shapes, thereby increasing the variety of forming methods and lowering the difficulty of forming.

[0013] In a second aspect, an embodiment of the present application provides a battery cell comprising the aforementioned housing assembly. In the present invention, using the aforementioned housing assembly can reduce the difficulty of forming the riveting flange of the electrode, is advantageous for forming a relatively thick bend, improves the reliability of the connection between the electrode and the housing, and improves the reliability of the battery cell.

[0014] In some embodiments of the present application, the main body and the connecting part are enclosed to form a receiving groove, and the battery cell further includes a cover plate, the cover plate is installed by being placed over the receiving groove, and a weld is formed between the other side of the end far from the housing and the cover plate.

[0015] In the technical solution described above, by installing a receiving groove, the weight of the electrode can be reduced, which is advantageous for improving the energy density of the battery cell. By installing a cover plate over the receiving groove, the cover plate can replace the electrode and be welded to components such as an external conductor or a busbar, thereby reducing the probability of separation between the electrode and the conductive part of the electrode assembly, which is advantageous for improving the reliability of the battery cell. Additionally, by installing a concave portion on one side of the end of the bent portion and forming a weld between the other side and the cover plate, the concave portion can improve the riveting flange quality of the electrode, so the forming quality of the bent portion is relatively high, and it is advantageous for improving the weld forming quality of the weld when the end of the bent portion is welded to the cover plate.

[0016] In some embodiments of the present application, the housing has a first wall, and a via hole is installed in the first wall and forms a reference plane perpendicular to the first wall, and the projection of the concave portion in the reference plane is located within the projection of the cover plate in the reference plane.

[0017] In the technical solution described above, a reference plane perpendicular to the first wall is created, and the projection of the concave portion on the reference plane is positioned within the projection of the cover plate on the reference plane. By using the structure, the cover plate can act as a reinforcing element at a position corresponding to the concave portion on the bent portion, thereby further enhancing the strength at the position where the end of the bent portion is located, and thus further improving the structural stability of the housing assembly.

[0018] In some embodiments of the present application, a through-hole is provided in the main body portion, and the through-hole is in communication with a receiving groove; the battery cell includes an electrode assembly, the electrode assembly is installed within a housing and has a conductive portion, the conductive portion penetrates the through-hole, and a portion of the conductive portion located within the receiving groove is electrically connected to the main body portion or the connecting portion.

[0019] In the technical solution described above, the receiving groove can serve to accommodate a portion of the conductive part, and the portion of the conductive part after passing through the through-hole can be placed within the receiving groove, thereby reducing the volume occupied by the conductive part within the housing and saving internal housing space, which is advantageous for arranging a larger electrode assembly and further improves the energy density of the battery cell.

[0020] In a third aspect, an embodiment of the present application provides a battery comprising the aforementioned battery cell. In the technical solution, using the aforementioned battery cell can improve the overall reliability of the battery and is advantageous for improving the battery's performance and extending its service life.

[0021] In a fourth aspect, an embodiment of the present application provides an electric device comprising the aforementioned battery cell or the aforementioned battery. In the technical solution, the aforementioned battery cell and battery have relatively high reliability, which is advantageous for improving the reliability of the electric device, improving the performance of the battery, and extending its service life. Brief explanation of the drawing

[0022] In order to explain the technical method of the embodiments of the present application more clearly, the drawings to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings merely illustrate some embodiments of the present application and should not be construed as limiting the scope, and those skilled in the art may obtain other related drawings based on these drawings without creative work. FIG. 1 is a structural schematic diagram of a vehicle provided in some embodiments of the present application; FIG. 2 is a structural exploded view of a battery provided in some embodiments of the present application; FIG. 3 is a structural schematic diagram of a battery cell provided in some embodiments of the present application; FIG. 4 is a top view of a battery cell provided in some embodiments of the present application; FIG. 5 is a schematic diagram cut along line AA of FIG. 4; FIG. 6 is a partial enlarged schematic diagram of position I in FIG. 5; FIG. 7 is a partial internal schematic diagram of a battery cell provided in some embodiments of the present application; FIG. 8 is a structural schematic diagram of a riveted, flanged pole provided in some embodiments of the present application; FIG. 9 is a schematic diagram of various structural features of a concave portion on a pole provided in some embodiments of the present application. Specific details for implementing the invention

[0023] In order to provide a clearer understanding of the purpose, technical solution, and advantages of the embodiments of the present application, the technical solution according to the embodiments of the present application will be clearly explained below in conjunction with the drawings of the embodiments of the present application. It will be obvious that the embodiments described are only some embodiments of the present application, not all embodiments. All other embodiments obtained by a person skilled in the art without creative labor based on the embodiments of the present application also fall within the scope of protection of the present application.

[0024] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art of this application; terms used in the specification of this application are used merely for the purpose of describing specific embodiments; and are not intended to limit this application; and any variations of the terms “comprising” and “having” used in the specification, claims, and description of the drawings above are intended to encompass non-exclusive inclusion. Terms such as “first,” “second,” etc., used in the specification, claims, or drawings above are used to distinguish different objects, not to describe a specific order or master-slave relationship.

[0025] The term "Examples" as used in this application means that specific features, structures, or characteristics described by combining examples may be included in at least one of the embodiments of this application. The words appearing in various places in this specification do not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive from other embodiments.

[0026] In describing this application, unless otherwise clearly defined and limited, the terms “mounting,” “connecting to,” “connection,” and “attachment” are to be understood in a broad sense and may, for example, be a fixed connection, a detachable connection, or an integral connection; may be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two elements. Those skilled in the art will understand the specific meaning of the aforementioned terms in this application according to the specific circumstances.

[0027] In this application, the term "and / or" merely describes an association describing related objects and indicates that three relationships may exist; for example, A and / or B may represent three cases: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the symbol " / " generally indicates that the preceding and succeeding related objects are in an "or" relationship.

[0028] In the embodiments of this application, the same drawing symbols denote the same parts, and for brevity, detailed descriptions of the same parts in other embodiments are omitted. It should be understood that the dimensions, such as thickness, length, and width, of the various parts of the embodiments of this application illustrated in the drawings, and the dimensions, such as the overall thickness, length, and width, of the integrated device, are merely illustrative and should not constitute any limitation to this application.

[0029] The term "plural" as used in this application refers to two or more (including two).

[0030] In this application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, rectangular, or have other shapes, and the embodiments of this application are not limited thereto. Battery cells are generally classified into three types based on the packaging method: cylindrical battery cells, rectangular battery cells, and soft-pack battery cells, and the embodiments of this application are not limited thereto.

[0031] The term "battery" as used in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, etc. The battery generally includes a case for packaging one or more battery cells or a plurality of battery modules. The case can prevent liquid or other foreign substances from affecting the charging or discharging of the battery cells.

[0032] A battery cell comprises a housing, an electrode assembly, and an electrolyte, and the housing is used to accommodate the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell operates primarily by relying on the movement of metal ions between the positive electrode and the negative electrode. The positive electrode includes a positive current collector and a positive active material layer, the positive active material layer is coated on the surface of the positive current collector, a positive current collector without the positive active material layer is protruded from the positive current collector coated with the positive active material layer, and the positive current collector without the positive active material layer is used as a positive tab. Taking a lithium-ion battery as an example, the material of the positive current collector may be aluminum, and the positive active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode comprises a negative current collector and a negative active material layer, wherein the negative active material layer is coated on the surface of the negative current collector, and a negative current collector without the negative active material layer is protruded from the negative current collector coated with the negative active material layer, and the negative current collector without the negative active material layer is used as a negative tab. The material of the negative current collector may be copper, and the negative active material may be carbon or silicon, etc. To ensure that melting does not occur when a large current passes through, the number of positive tabs is multiple and stacked together, and the number of negative tabs is multiple and stacked together.

[0033] The material of the separator may be PP (polypropylene) or PE (polyethylene), etc. Additionally, the electrode assembly may have a wound structure or a lamination structure, but is not limited thereto in the embodiments of the present application.

[0034] In recent years, new energy vehicles have made rapid progress, and in the field of electric vehicles, power batteries play an irreplaceable and critical role as the power source. A battery consists of a case and multiple battery cells housed within it. As a core component of new energy vehicles, batteries face relatively high demands regarding both safety and cyclic lifespan.

[0035] A practical new person discovered that in a general power battery, the housing assembly of a battery cell includes a housing, a pole, an upper plastic, and a sealing ring, and that the pole ensures sealing by compressing the sealing ring through a riveting flange method by clamping the upper plastic and the sealing ring to the housing. In order to ensure that the pole can be riveted to clamp the upper plastic and the sealing ring, the thickness of the pole's flange is relatively thick to provide a better clamping effect; however, the thicker the flange, the stronger the pole's resistance to deformation and the more difficult it is to form, which simultaneously affects the reliability of the pole's flange and, furthermore, affects the reliability of the battery cell.

[0036] Based on the above considerations, in order to solve the problem that forming a thick flange of a pole is relatively difficult and reliability is relatively poor after the pole is flanged, a new practical model has designed a housing assembly, which includes a housing and a pole, and a via hole is installed in the housing; the pole includes a main body part, a connecting part and a bending part, the main body part is located inside the housing, the connecting part penetrates the via hole and connects the main body part and the bending part, the bending part is located outside the housing, the bending part has an end near the connecting part, and a concave part is installed on one side of the end near the housing.

[0037] In a housing assembly of this structure, the pole is installed to include a main body, a connecting part, and a bending part, and a recess is installed at the end of the bending part near the connecting part, and the recess is located on one side of the end near the housing. When the pole is riveted flanged to form the bending part and the connecting part, the recess can reduce the effect of material compression on the formation of the bending part by the bending of the pole, and the difficulty of forming the bending part in the pole can be lowered. At the same time, the recess can form a relatively small bending angle between the bending part and the connecting part, that is, the bending part can be nearly parallel to the housing, thereby improving the clamping effect of the bending part on the sealing member in the via hole and is advantageous for improving the reliability of the battery cell.

[0038] The battery disclosed in the embodiments of the present application may be used in electric devices such as vehicles, ships, or aircraft, but is not limited thereto. An electric system equipped with the electric device comprising the battery cell, battery, etc. disclosed in the present application may be used, and this is advantageous for improving the scope of application of the electric device comprising the battery cell, battery, etc.

[0039] Embodiments of the present application provide an electric device that uses a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, tablet, laptop, electric toy, power tool, electric bicycle, electric vehicle, ship, space equipment, etc. Here, electric toys may include stationary or mobile electric toys such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, and space equipment may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0040] In the following embodiments, for convenience of explanation, the electric device of one embodiment of the present application is described as a vehicle (1000).

[0041] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle (1000) provided in some embodiments of the present application. The vehicle (1000) may be a fuel vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc. A battery (100) is installed inside the vehicle (1000), and the battery (100) may be installed in the bottom, head, or tail portion of the vehicle (1000). The battery (100) may be used to supply power to the vehicle (1000), and, for example, the battery (100) may be used as the working power source for the vehicle (1000). The vehicle (1000) may further include a controller (200) and a motor (300), and the controller (200) is used to control the battery (100) to supply power to the motor (300), for example, to supply the working power required for operation, navigation, and driving of the vehicle (1000).

[0042] In some embodiments of the present application, the battery (100) may be used as a working power source for the vehicle (1000), as well as as a driving power source for the vehicle (1000), and may provide driving power to the vehicle (1000) by replacing or partially replacing fuel or natural gas.

[0043] Referring to FIG. 2, FIG. 2 is a structural exploded view of a battery (100) provided in some embodiments of the present application. The battery (100) includes a case (10) and a plurality of battery cells (20), and the battery cells (20) are to be accommodated within the case (10). Here, the case (10) is to provide an assembly space for the battery cells (20), and the case (10) may use various structures. In some embodiments, the case (10) may include a first case body (11) and a second case body (12), and the first case body (11) and the second case body (12) are covered and joined together, and the first case body (11) and the second case body (12) jointly form a limited assembly space for accommodating the battery cells (20). The second case body (12) may be a hollow structure with one end open, and the first case body (11) may be a plate-shaped structure, and the first case body (11) is fitted over the open side of the second case body (12) and joined so that the first case body (11) and the second case body (12) jointly form a limited assembly space; both the first case body (11) and the second case body (12) may be hollow structures with one end open, and the open side of the first case body (11) is fitted over the open side of the second case body (12) and joined. Of course, the case (10) formed by the first case body (11) and the second case body (12) may have various shapes such as a cylinder, a rectangular prism, etc.

[0044] In the battery (100), multiple battery cells (20) may be connected in series, parallel, or a combination of series and parallel, and a combination of series and parallel indicates that some of the multiple battery cells (20) may be connected in series and others in parallel. The multiple battery cells (20) may be directly connected in series, parallel, or a combination of series and parallel, and an integrated body composed of multiple battery cells (20) may be housed within a case (10); of course, the battery (100) may first form a battery module format in series, parallel, or a combination of series and parallel with multiple battery cells (20), and then connect the multiple battery modules again in series, parallel, or a combination of series and parallel to form a single integrated body and house it within a case (10). The battery (100) may also include other structures, for example, the battery (100) may also include a busbar component for implementing electrical connections between multiple battery cells (20).

[0045] Referring to FIG. 2, FIG. 2 is an exploded view of a battery (100) provided in some embodiment of the present application. The battery (100) includes a plurality of rows of battery cells (20), the plurality of rows of battery cells (20) are arranged along the length direction of a case (10), and each row of battery cells (20) includes a plurality of battery cells (20) arranged along the width direction of the case (10); or, the plurality of rows of battery cells (20) are arranged along the width direction of the case (10), and each row of battery cells (20) includes a plurality of battery cells (20) arranged along the length direction of the case (10).

[0046] Here, each battery cell (20) may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell (20) may be cylindrical, flat, rectangular, or have other shapes. For example, in FIG. 2, the shape of the battery cell (20) is rectangular.

[0047] According to some embodiments of the present application, with reference to FIGS. 3 through 6, an embodiment of the present application provides a housing assembly (21), comprising a housing (211) and a pole (212), wherein the housing (211) has a via hole (211a) installed therein; the pole (212) includes a main body (201), a connecting part (202), and a bending part (203), wherein the main body (201) is located inside the housing (211), the connecting part (202) penetrates the via hole (211a) and connects the main body (201) and the bending part (203), the bending part (203) is located outside the housing (211), and the bending part (203) has an end near the connecting part (202), and a concave part (212a) is installed on one side of the end near the housing.

[0048] The main body (201) is located on the inside of the housing (211), and the bending part (203) is located on the outside of the housing (211). The main body (201) and the bending part (203) are fitted together so that the pole (212) can be fixed to the housing (211), thereby reducing the probability of the pole (212) detaching from the housing (211). For example, referring to FIG. 5, the main body (201) and the bending part (203) can be located at both ends of the third direction (Z) of the housing wall (2111) of the housing (211).

[0049] The concave portion (212a) may be a structure similar to a “notch” that is sunken inward (see FIG. 6), and for example, the concave portion (212a) may be a concave rib. Referring to FIGS. 8 and 9, when the pole (212) is not undergoing riveting flange forming, the pole (212) may include a main body (201) and an extension (204). The extension (204) is installed on the main body (201), and a concave portion (212a) can be compressed on the outer side of the extension (204) through a rolling member (e.g., a knife). When a part of the pole (212) passing through the via hole (211a) undergoes riveting flange forming, the extension (204) penetrates the via hole (211a), and the concave portion (212a) can remove some material of the pole (212). Thus, the resistance formed by the compression of the material when the pole (212) is riveted flanged is reduced, and the pole (212) can act as a guide when the pole (212) is riveted flanged. The difficulty of riveting the flange of the pole (212) is lowered, and the extension (204) is bent more easily under the punching action of the punching head to form the bent portion (203) and the connection portion (202), thereby lowering the difficulty of forming and improving work efficiency. In addition, since the difficulty of riveting the flange of the pole (212) is lowered, the pole (212) can be used to form a bent portion (203) with a relatively thick thickness, and the bent portion (203) with a relatively thick thickness can provide a relatively large clamping force, thereby improving the reliability of the connection between the pole (212) and the housing (211).

[0050] In the technical method described above, the pole (212) is installed to include a main body (201), a connecting part (202), and a bending part (203), and a concave part (212a) is installed at the end of the bending part (203) near the connecting part (202), and the concave part (212a) is located on one side of the end near the housing (211). When the pole (212) is riveted flanged to form the bending part (203) and the connecting part (202), the concave part (212a) can reduce the effect of material compression on the formation of the bending part (203) by the bending of the pole (212), and also provide a guide function, thereby lowering the difficulty of forming the bending part (203) on the pole (212). At the same time, the concave part (212a) is relatively small between the bending part (203) and the connecting part (202). A bending angle can be formed, that is, the bending portion (203) can be nearly parallel to the housing (211), which is advantageous for improving the clamping force of the bending portion (203) against the sealing member (213) in the via hole (211a) and improving the reliability of the battery cell (20).

[0051] In some embodiments of the present application, referring to FIG. 6, the depth of the concave portion (212a) is T, and the thickness of the folded portion (203) is H, where 0 <T / H≤0.7이다.

[0052] The depth size (T) of the concave portion (212a) may refer to the size in the fourth direction (W) in FIG. 6, and the thickness size (H) of the bent portion (203) may refer to the size in the third direction (Z) in FIG. 6. T / H may be 0.1, 0.15, 0.18, 0.2, 0.23, 0.27, 0.3, 0.33, 0.36, 0.4, 0.44, 0.47, 0.5, 0.55, 0.58, 0.6, 0.62, 0.66, 0.68, 0.7, etc., but is not limited thereto.

[0053] If the ratio of T / H is greater than 0.7, the depth of the concave portion (212a) is relatively deep and there is a large amount of material removed from the end of the bent portion (203), so the strength of the bent portion (203) is easily weakened, and after the pole (212) is riveted flanged, the strength between the bent portion (203) and the connecting portion (202) is insufficient, so the probability of breakage is high, which affects the reliability of the pole (212).

[0054] In the above-described technical method, the ratio of the depth of the concave portion (212a) to the thickness of the bent portion (203) is set to a range of 0.7 or less, so that the concave portion (212a) has an appropriate depth, thereby effectively lowering the difficulty of riveting the pole (212) into a flange and ensuring that the pole (212) has reliable strength after riveting the pole (212), which is advantageous for improving the reliability of the pole (212).

[0055] In some embodiments of the present application, referring to FIG. 6, the housing (211) has a first wall (2111), a via hole (211a) is installed in the first wall (2111), and the main body (201) and the connecting part (202) are enclosed to form a receiving groove (212b), and a reference plane perpendicular to the first wall (2111) is formed, and the projection of the concave part (212a) on the reference plane is located within the projection of the receiving groove (212b) on the reference plane.

[0056] Since a recess (212a) is installed at the end of the bend portion (203) near the connection portion (202), the recess (212a) can affect the strength of the position where the end of the bend portion (203) is located, and since the receiving groove (212b) can be used to mount the cover plate (214), the projection of the recess (212a) from the reference plane is positioned within the projection of the receiving groove (212b) from the reference plane, that is, in the first direction (X), the recess (212a) can face the side wall of the receiving groove (212b), and the cover plate (214) can be fitted into the receiving groove (212b) and then cause a strength-reinforcing effect, and the structural stability of the housing assembly (21) can be improved by compensating for the weakened strength caused by the installation of the recess (212a) in the bend portion (203).

[0057] In the technical method described above, a reference plane perpendicular to the first wall (2111) is created, and the projection of the concave portion (212a) on the reference plane is positioned within the projection of the receiving groove (212b) on the reference plane. By using this structure, the strength weakened by installing the concave portion (212a) in the bending portion (203) after mounting the cover plate (214) in the receiving groove (212b) can be compensated, which is advantageous for improving the strength at the location where the end of the bending portion (203) is located, and thus improving the structural stability of the housing assembly (21).

[0058] In some embodiments of the present application, referring to FIG. 5, the housing assembly (21) further includes a sealing member (213), the sealing member (213) is installed by being fitted into the connecting part (202), and part is located between the bending part (203) and the housing (211).

[0059] In the above-described technical method, the bent portion (203) formed when the pole (212) is riveted flange can clamp the sealing member (213) to the housing (211), thereby allowing the sealing member (213) to seal the gap between the via hole (211a) and the connection portion (202), thereby reducing the risk of leakage in the housing assembly (21).

[0060] In some embodiments of the present application, the sealing member (213) may be a rubber sealing ring, a polyurethane sealing ring, etc., but is not limited thereto.

[0061] In some embodiments of the present application, referring to FIG. 9, the concave portion (212a) includes one of a polygon, an arc polygon, and an arc shape. The polygon may include, but is not limited to, a triangle, a square, a pentagon, etc. The concave portion (212a) may be arc-shaped. The arc polygon may include, but is not limited to, an arc triangle, an arc square, an arc pentagon, etc.

[0062] In the technical solution described above, by installing the concave portion (212a) to include one of a polygon, a circular polygon, and an arc shape, the concave portion (212a) can have various shapes, thereby increasing the variety of molding methods and lowering the difficulty of molding.

[0063] In a second aspect, referring to FIG. 5, an embodiment of the present application provides a battery cell (20) comprising a housing assembly (21).

[0064] In the battery cell (20), a sealing member (213) and an upper plastic member (215) can be fitted and installed in the electrode (212), and a punching member acts on the extension (204) of the electrode (212) so that the extension (204) is bent toward one side near the edge of the via hole (211a) at the concave portion (212a), and the bent portion (203) formed by the extension (204) can clamp the sealing member (213) and the upper plastic member (215) to the housing (211), thereby completing the assembly of the electrode (212), the sealing member (213), and the upper plastic member (215) in the housing (211).

[0065] In the above-described technical method, using the above-described housing assembly (21) can lower the difficulty of forming the riveting flange of the pole (212), is advantageous for forming a relatively thick bend (203), improves the reliability of the connection between the pole (212) and the housing (211), and improves the reliability of the battery cell (20).

[0066] In some embodiments of the present application, referring to FIGS. 5 and 7, the main body (201) and the connecting part (202) are enclosed to form a receiving groove (212b), and the battery cell (20) further includes a cover plate (214), the cover plate (214) is installed by covering the receiving groove (212b), and a weld (216) is formed between the other side of the end far from the housing (211) and the cover plate (214).

[0067] The receiving groove (212b) can reduce the weight of the pole (212) and further reduce the overall weight of the housing assembly (21), thereby improving the energy density of the battery cell (20).

[0068] When a battery cell (20) needs to connect components such as an external conductor or a busbar, a cover plate (214) is installed and the cover plate (214) is placed over the receiving groove (212b) so that the cover plate (214) can be welded to components such as an external conductor or a busbar, thereby allowing the electrode (212) to be electrically connected to the external conductor or a busbar. Since the electrode (212) must be welded to the conductive part (221) of the electrode assembly (22), the cover plate (214) can separate the electrode (212) from the conductive part (221). When welding the cover plate (214) to components such as an external conductor or a busbar, the probability of a relatively large temperature rise occurring in the electrode (212) can be reduced, furthermore, the probability of melting occurring in the electrode tab (212) and the conductive part (221) can be reduced, and the reliability of the connection between the electrode (212) and the conductive part (221) Improves.

[0069] In the technical method described above, by installing a receiving groove (212b), the weight of the electrode (212) can be reduced, which is advantageous for improving the energy density of the battery cell (20), and by installing a cover plate (214) over the receiving groove (212b), the cover plate (214) can replace the electrode (212) and be welded to a component such as an external conductor or a bus bar, thereby reducing the probability of separation between the electrode (212) and the conductive portion (221) of the electrode assembly (22), which is advantageous for improving the reliability of the battery cell (20). Additionally, by installing a concave portion (212a) on one side of the end of the bent portion (203) and forming a weld portion (216) between the other side and the cover plate (214), the concave portion (212a) can improve the riveting flange quality of the pole (212), so that the forming quality of the bent portion (203) is relatively high, and when welding the end of the bent portion (203) to the cover plate (214), it is advantageous to improve the weld forming quality of the weld portion (216).

[0070] In some embodiments of the present application, referring to FIG. 6, the housing (211) has a first wall (2111), and a via hole (211a) is installed in the first wall (2111) and forms a reference plane perpendicular to the first wall (2111), and the projection of the concave portion (212a) on the reference plane is located within the projection of the cover plate (214) on the reference plane.

[0071] Referring to FIG. 6, that is, in the first direction (X), the concave portion (212a) may face the cover plate (214), and the cover plate (214) may come into contact with the groove wall of the receiving groove (212b) corresponding to the concave portion (212a), thereby providing a better strength reinforcement effect, which compensates for the weakened strength caused by the installation of the concave portion (212a) in the bent portion (203), and further improves the structural stability of the housing assembly (21).

[0072] In the technical method described above, a reference plane perpendicular to the first wall (2111) is created, and the projection of the concave portion (212a) on the reference plane is positioned within the projection of the cover plate (214) on the reference plane. By using the structure, the cover plate (214) can serve as a reinforcing element for the position corresponding to the concave portion (212a) on the bent portion (203), thereby further enhancing the strength of the position where the end of the bent portion (203) is located, and thus further enhancing the structural stability of the housing assembly (21).

[0073] In some embodiments of the present application, referring to FIG. 7, a through hole (201a) is provided in the main body (201), and the through hole (201a) is in communication with a receiving groove (212b); the battery cell (20) includes an electrode assembly (22), the electrode assembly (22) is installed in a housing (211) and has a conductive part (221), the conductive part (221) is penetrated through the through hole (201a), and a part of the conductive part (221) located in the receiving groove (212b) is electrically connected to the main body (201) or the connecting part (202).

[0074] The conductive portion (221) may refer to a conductive component connecting the electrode assembly (22) and the electrode column (212), and specifically, the conductive portion (221) may be understood as an electrode tab. Here, the portion of the conductive portion (221) located within the receiving groove (212b) may be electrically connected to the main body portion (201), or the portion of the conductive portion (221) located within the receiving groove (212b) may be electrically connected to the connecting portion (202).

[0075] In the above-described technical method, the receiving groove (212b) can serve to receive a portion of the conductive portion (221), and the portion of the conductive portion (221) after passing through the through hole (201a) can be placed within the receiving groove (212b), thereby reducing the volume occupied by the conductive portion (221) within the housing (211) and saving internal space of the housing (211), which is advantageous for placing a larger size electrode assembly (22) and further improves the energy density of the battery cell (20).

[0076] In a third aspect, an embodiment of the present application provides a battery (100) comprising the aforementioned battery cell (20).

[0077] In the above-described technical method, using the aforementioned battery cell (20) can improve the overall reliability of the battery (100), and is advantageous for improving the performance of the battery (100) and extending its lifespan.

[0078] In a fourth aspect, an embodiment of the present application provides an electric device comprising the aforementioned battery cell (20) or battery (100).

[0079] In the above-described technical method, the above-described battery cell (20) and battery (100) have high reliability, which is advantageous for improving the reliability of the electric device, improving the usage performance of the battery (100), and extending the service life.

[0080] It should be explained that the embodiments and features of the embodiments of the present application can be combined with one another insofar as there is no conflict.

[0081] The foregoing are merely preferred embodiments of the present application and are not intended to limit the application; those skilled in the art may make various modifications and changes to the present application. All modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present application shall be included within the scope of protection of the present application. Explanation of the symbols

[0082] 1000: Vehicle 100: Battery 10: Case 11: First case main body 12: Second case main body 20: Battery cell 21: Housing Assembly 211: Housing 2111: First Wall 211a: via hole 212: Geukju 201: Main body 201a: Through hole 202: Connection 203: Bending section 204: Extension part 212a: Concave part 212b: Accommodation home 213: Sealing member 214: Cover Plate 215: Upper plastic member 216: Welded part 22: Electrode assembly 221: Evangelism Department 200: Controller 300: Motor X: First direction Y: Second direction Z: Third direction W: 4th direction

Claims

Claim 1 A housing assembly comprising: a housing in which a via hole is installed; and a pole including a main body, a connecting part, and a bent part, wherein the main body is located inside the housing, the connecting part penetrates the via hole and connects the main body and the bent part, the bent part is located outside the housing, the bent part has an end near the connecting part, and a concave part is installed on one side of the end near the housing. Claim 2 In claim 1, the depth of the concave portion is T, and the thickness of the bent portion is H, where 0 <T / H≤0.7인, 하우징 어셈블리. Claim 3 A housing assembly according to claim 1, wherein the housing has a first wall, the via hole is installed in the first wall, the main body and the connecting part are enclosed to form a receiving groove, a reference plane perpendicular to the first wall is formed, and the projection of the concave part on the reference plane is located within the projection of the receiving groove on the reference plane. Claim 4 A housing assembly according to any one of claims 1 to 3, wherein the housing assembly further comprises a sealing member, the sealing member is installed by being fitted into the connecting part, and a portion thereof is located between the bending part and the housing. Claim 5 A housing assembly according to any one of claims 1 to 4, wherein the concave portion comprises one of a polygon, a circular polygon, and an arc shape. Claim 6 A battery cell comprising a housing assembly according to any one of paragraphs 1 to 5. Claim 7 A battery cell according to claim 6, wherein the main body and the connecting part are enclosed to form a receiving groove, the battery cell further includes a cover plate, the cover plate is installed by being placed over the receiving groove, and a weld is formed between the other side of the end far from the housing and the cover plate. Claim 8 A battery cell according to claim 7, wherein the housing has a first wall, the via hole is installed in the first wall and forms a reference plane perpendicular to the first wall, and the projection of the concave portion on the reference plane is located within the projection of the cover plate on the reference plane. Claim 9 A battery cell according to claim 7, wherein a through hole is installed in the main body portion, and the through hole is in communication with the receiving groove, and the battery cell includes an electrode assembly, the electrode assembly is installed within the housing and has a conductive portion, the conductive portion penetrates the through hole, and a portion of the conductive portion located within the receiving groove is electrically connected to the main body portion or the connecting portion. Claim 10 A battery comprising a battery cell according to any one of paragraphs 6 to 7. Claim 11 An electric device comprising a battery cell according to any one of paragraphs 6 to 7, or a battery according to paragraph 10.

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