Electric connector, battery device, energy storage system and electric equipment

Abstract

The invention relates to the technical field of energy storage, and provides an electric connecting piece, a battery device, an energy storage system and electric equipment.The electric connecting piece comprises two electric connecting parts which are arranged at intervals, the two electric connecting parts are used for being electrically connected with pole columns of two adjacent battery cells respectively, and the part of the electric connecting piece is arranged in a sunken mode in the thickness direction of the electric connecting piece; buffering structures are formed in the concave portions of the electric connecting pieces, the buffering structures are arranged in at least two directions perpendicular to the thickness direction of the electric connecting pieces, and the buffering structures are arranged between the two electric connecting parts. And / or the electric connecting piece further comprises two annular adjacent parts, the two annular adjacent parts surround and are connected with the two electric connecting parts respectively, and at least one annular adjacent part is provided with a buffer structure. According to the electric connector, the battery device, the energy storage system and the electric equipment provided by the invention, the problem that the connection position of the electric connection bar and the battery cell is easily damaged when the battery cell in the existing power battery module expands can be solved.

Description

Technical Field

[0001] The present disclosure relates to the field of energy storage technology, and in particular to an electrical connector, a battery device, an energy storage system, and an electrical device. Background Art

[0002] Most existing power battery modules connect the battery cells in series and in parallel through the CCS (Cell Contact System) component to form an electrical connection path to realize the function of the power battery module to provide power. However, in actual applications, two adjacent battery cells are connected through the electrical connection bar in the CCS component. But when the battery cell expands, the electrical connection bar will be deformed by the force, which can easily cause damage to the connection between the electrical connection bar and the battery cell. Summary of the invention

[0003] The embodiments of the present disclosure provide an electrical connector, a battery device, an energy storage system, and an electrical device, which aim to solve the problem that the connection position between the electrical connection bar and the battery cell is easily damaged when the battery cell in the existing power battery module expands.

[0004] According to some embodiments of the present disclosure, on one hand, an electrical connector is provided, the electrical connector comprising two electrical connection parts arranged at intervals, the two electrical connection parts being used to electrically connect to poles of two adjacent battery cells respectively, a part of the electrical connector being recessed along the thickness direction of the electrical connector, the recessed part of the electrical connector forming a buffer structure, the buffer structure being arranged along at least two directions perpendicular to the thickness direction of the electrical connector, wherein: The buffer structure is arranged between the two electrical connection parts; and / or, The electrical connector also includes two annular adjacent portions, which respectively surround and connect the two electrical connecting portions, and at least one of the annular adjacent portions is provided with the buffer structure.

[0005] In some embodiments, the buffer structure includes a first buffer structure arranged between the two electrical connection parts, the first buffer structure includes a first convex strip extending along a first direction, and a second convex strip extending along a second direction, wherein the first direction, the second direction, and the spacing directions of the two electrical connection parts are different.

[0006] In some embodiments, the middle portion of the first convex strip and the middle portion of the second convex strip are arranged to intersect.

[0007] In some embodiments, the first ridge includes a first ridge segment and a second ridge segment arranged at intervals in the first direction; the second ridge includes a third ridge segment and a fourth ridge segment arranged at intervals in the second direction, the third ridge segment is located on a side of the second ridge segment close to the first ridge segment, the third ridge segment intersects with the first ridge segment, the fourth ridge segment is located on a side of the first ridge segment close to the second ridge segment, and the fourth ridge segment intersects with the second ridge segment.

[0008] In some embodiments, the first buffer structure further includes a fifth convex segment arranged in parallel with the first convex segment, a sixth convex segment arranged in parallel with the second convex segment, a seventh convex segment arranged in parallel with the third convex segment, and an eighth convex segment arranged in parallel with the fourth convex segment; The fifth convex segment is located on a side of the first convex segment away from the third convex segment, the sixth convex segment is located on a side of the second convex segment away from the fourth convex segment, the seventh convex segment is located on a side of the third convex segment away from the first convex segment, and the eighth convex segment is located on a side of the fourth convex segment away from the second convex segment.

[0009] In some embodiments, the fifth rib segment intersects with the eighth rib segment.

[0010] In some embodiments, the sixth rib segment intersects with the seventh rib segment.

[0011] In some embodiments, the first convex strip includes a first convex strip segment and a second convex strip segment arranged at intervals in the first direction; the second convex strip passes through the first convex strip from the interval between the first convex strip segment and the second convex strip segment.

[0012] In some embodiments, the first buffer structure further includes a third ridge extending along a third direction, the third ridge is located on a side of the second ridge close to the first ridge segment, and the third ridge is located on a side of the first ridge segment close to the second ridge segment.

[0013] In some embodiments, the first buffer structure further includes a fourth ridge extending along a fourth direction, the fourth ridge is located on a side of the second ridge close to the second ridge segment, and the fourth ridge is located on a side of the second ridge segment close to the first ridge segment.

[0014] In some embodiments, the buffer structure includes a second buffer structure disposed on the annular adjacent portion, and the second buffer structure is arranged along the circumference of the electrical connecting portion.

[0015] In some embodiments, a through hole is provided through the electrical connector, and the annular adjacent portion includes a plurality of connecting arms arranged at intervals along the circumference of the electrical connector, and the connecting arms are formed by bending and extending from the inner hole wall of the through hole along the recessed direction of the second buffer structure, and one end of the plurality of connecting arms away from the inner hole wall of the through hole is connected to the electrical connector, and the plurality of connecting arms form the second buffer structure.

[0016] In some embodiments, the second buffer structure includes four connecting arms, two of which are opposite to each other in a spacing direction between the two electrical connecting portions, and the other two are opposite to each other in a direction perpendicular to the spacing direction between the electrical connecting portions.

[0017] According to some embodiments of the present disclosure, another aspect of the present disclosure further provides a battery device, including: An electrical connector, wherein the electrical connector is the above-mentioned electrical connector; A battery cell assembly, the battery cell assembly comprises a plurality of battery cells, and poles of two adjacent battery cells are respectively electrically connected to two electrical connection parts of one electrical connector.

[0018] According to some embodiments of the present disclosure, another aspect of the present disclosure further provides an energy storage system, comprising the above-mentioned battery device.

[0019] According to some embodiments of the present disclosure, on the other hand, an electrical device is provided, comprising the above-mentioned energy storage system.

[0020] The technical solution provided by the embodiments of the present disclosure has at least the following advantages: In the electrical connector provided by the embodiment of the present disclosure, the electrical connector is provided with two electrical connection parts respectively connecting two adjacent battery cells, and the electrical connector is provided with a recessed buffer structure between the two electrical connection parts and / or at least one position close to the electrical connection part. Since the buffer structure is a multi-directional buffer structure arranged along at least two different directions, when connecting two adjacent battery cells, the electrical connector can provide a buffering effect in multiple directions through this multi-directional buffer structure. The electrical connector can effectively absorb and disperse the expansion force generated by the battery cell when it expands in multiple directions, avoid damage to the connection position of the electrical connector and the battery cell due to excessive force on a single point, thereby preventing the problem of loose electrical connection or poor contact caused by the expansion of the battery cell, reducing the risk of short circuit, and improving the safety of the system. In addition, the setting of the multi-directional buffer structure can also increase the overall stiffness of the electrical connector, enhance its ability to resist external vibration and impact, and thus improve the stability and reliability of the battery device. At the same time, the multi-directional buffer structure can also increase the surface area of ​​the electrical connector in contact with the air, which is conducive to the dissipation of heat. Especially when working in a high temperature environment, the multi-directional buffer structure can better maintain the battery temperature within a reasonable range, thereby improving the current capacity of the electrical connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings, and these exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise specified, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the traditional technology, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of an electrical connector provided in the first embodiment of the present disclosure; Figure 2 A schematic structural diagram of an electrical connector provided in accordance with a second embodiment of the present disclosure; Figure 3 A schematic structural diagram of an electrical connector provided in a third embodiment of the present disclosure; Figure 4 A schematic structural diagram of an electrical connector provided in a fourth embodiment of the present disclosure; Figure 5 A schematic structural diagram of an electrical connector provided in a fifth embodiment of the present disclosure; Figure 6 A schematic structural diagram of an electrical connector provided in a sixth embodiment of the present disclosure; Figure 7 A schematic structural diagram of a battery device provided in the first embodiment of the present disclosure; Figure 8 for Figure 7 A partial enlarged view of the middle A; Fig. 9 A schematic diagram of a connection structure between an electrical connector and a battery cell assembly in a battery device provided in a second embodiment of the present disclosure; Fig.10 for Fig. 9 Cross-sectional view of CEC connector and battery cell assembly.

[0023] Description of the accompanying drawings in this disclosure: Battery device 1000, electrical connector 100, first electrical connector 100a, second electrical connector 100b, electrical connecting portion 1, annular adjacent portion 2, connecting arm 21, first buffer structure 3, first convex strip 31, first convex strip segment 311, second convex strip segment 312, second convex strip 32, third convex strip segment 321, fourth convex strip segment 322, fifth convex strip segment 33, sixth convex strip segment 34, seventh convex strip segment 35, eighth convex strip segment 36, third convex strip 37, fourth convex strip 38, second buffer structure 4, perforation 5, positioning hole 6, observation hole 7, battery cell assembly 200, battery cell 210, pole 211. DETAILED DESCRIPTION

[0024] As can be seen from the background technology, two adjacent battery cells in a power battery module are connected by electrical connectors such as aluminum bars, and the two ends of the electrical connector in the length direction are respectively connected to the poles of the two adjacent battery cells by welding or the like, and are also connected to collection parts such as nickel sheets. However, most of the existing electrical connectors are only provided with a buffer protrusion structure extending along the width direction thereof. When the battery cell expands, this buffer protrusion structure can only release the expansion force in the length direction of the electrical connector. Therefore, the existing electrical connector cannot adapt to the expansion force transmitted to the electrical connector when the battery cell expands in multiple directions, which can easily cause the electrical connector to be deformed by force, and then cause damage to the connection position between the electrical connector and the battery cell.

[0025] The present disclosure provides an electrical connector, a battery device, an energy storage system, and an electrical device. The electrical connector is provided with two electrical connection parts respectively connecting two adjacent battery cells. The electrical connector is provided with a recessed buffer structure between the two electrical connection parts and / or at least one position close to the electrical connection part. Since the buffer structure is a multi-directional buffer structure arranged along at least two different directions, when connecting two adjacent battery cells, the electrical connector can provide a buffering effect in multiple directions through the multi-directional buffer structure. The electrical connector can effectively absorb and disperse the expansion force generated by the battery cell when it expands in multiple directions, avoiding damage to the connection position between the electrical connector and the battery cell due to excessive force on a single point, thereby preventing the problem of loose electrical connection or poor contact caused by the expansion of the battery cell, reducing the risk of short circuit, and improving the safety of the system. In addition, the provision of the multi-directional buffer structure can also increase the overall stiffness of the electrical connector, enhance its ability to resist external vibration and impact, and thus improve the stability and reliability of the battery device. At the same time, the multi-directional buffer structure can also increase the surface area of ​​the electrical connector in contact with the air, which is beneficial to the dissipation of heat. Especially when working in a high temperature environment, the multi-directional buffer structure can better maintain the battery temperature within a reasonable range, thereby improving the current carrying capacity of the electrical connector.

[0026] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined. Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0029] In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. For example, if the device or element in the figure is inverted, then the element described as being "below" or "below" or "below" or "bottom" of other elements or features will be oriented "above" or "top" of the other elements or features. Therefore, the term "below" may cover both the above and below orientations depending on the context in which the term is used, which will be obvious to a person of ordinary skill in the art. The material may be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatially relative descriptors used herein may be interpreted accordingly.

[0030] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0031] In the accompanying drawings corresponding to the embodiments of the present application, the thickness and area of ​​the layers are exaggerated for better understanding and ease of description. In addition, when describing that a component is "substantially" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a partial edge of the entire surface.

[0032] In the description of the embodiments of the present application, when a certain component "includes" another component, unless otherwise specified, other components are not excluded, and other components may be further included. A second component is formed or provided above or on the first component, or a second component is formed or provided on the surface of the first component, or a second component is formed or provided on one side of the first component, which may include an embodiment in which the first component and the second component are in direct contact, and may also include an embodiment in which an additional component may be provided between the first component and the second component, so that the first component and the second component may not be in direct contact. For the sake of simplicity and clarity, various components may be drawn arbitrarily in different proportions. In the accompanying drawings, some layers / components may be omitted for simplicity. Unless otherwise specified, a second component is formed or provided on the surface of the first component, which means that the first component is in direct contact with the second component. Among them, the above-mentioned "component" may refer to a layer, a film, an area, a part, a structure, etc.

[0033] The terms used in the description of the various embodiments described herein are only used to describe specific embodiments and are not intended to be limiting. As used in the description of the various embodiments described and in the appended claims, "the components" are also intended to include plural forms unless the context clearly indicates otherwise. Among them, components include components such as layers, films, regions, or plates.

[0034] The following will describe the various embodiments of the present disclosure in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present disclosure, many technical details are provided in order to enable the reader to better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present disclosure can be implemented.

[0035] The present disclosure provides an electrical connector. Figures 1 to 6 Various embodiments of the electrical connector provided by the present disclosure are shown.

[0036] See also Figures 1 to 6 In some embodiments, the electrical connector 100 includes two electrical connecting parts 1 arranged at intervals, the two electrical connecting parts 1 are used to electrically connect to the poles 211 of two adjacent battery cells 210 respectively, and a part of the electrical connector 100 is recessed along the thickness direction of the electrical connector 100, and the recessed part of the electrical connector 100 forms a buffer structure, and the buffer structure is arranged along at least two directions perpendicular to the thickness direction of the electrical connector 100, wherein: a buffer structure is arranged between the two electrical connecting parts 1; and / or, the electrical connector 100 also includes two annular adjacent parts 2, the two annular adjacent parts 2 respectively surround and connect the two electrical connecting parts 1, and at least one annular adjacent part 2 is provided with a buffer structure.

[0037] Specifically, see Figures 7 to 10 When the electrical connector 100 is disposed on the battery device 1000, the two ends of the electrical connector 100 are respectively connected to the poles 211 of two adjacent battery cells 210, and the portion of the electrical connector 100 used to connect to the poles 211 of the battery cells 210 forms an electrical connection portion 1, so that two electrical connection portions 1 are respectively formed at the two ends of the electrical connector 100. The two electrical connection portions 1 are respectively located at the two ends of the electrical connector 100 in a direction perpendicular to the thickness direction of the electrical connector 100. For example, the two electrical connection portions 1 can be respectively located at the two ends of the electrical connector 100 in the length direction or width direction of the electrical connector 100. The following will take the two electrical connection portions 1 being respectively located at the two ends of the electrical connector 100 in the length direction of the electrical connector 100 as an example for description, and define the thickness direction of the electrical connector 100 as the up-down direction, the surface of the electrical connector 100 close to the battery cell 210 as the lower surface, and the surface of the electrical connector 100 away from the battery cell 210 as the upper surface. The specific shape of the electrical connection portion 1 can be set according to actual conditions, for example, the electrical connection portion 1 can be set in a circular or square shape. Optionally, in some embodiments, the shape of the electrical connection portion 1 is compatible with the shape of the pole 211 of the battery cell 210.

[0038] The specific material of the electrical connector 100 can be set according to the actual situation. For example, the material of the electrical connector 100 can be aluminum, that is, the electrical connector 100 is aluminum bar. The specific shape and style of the electrical connector 100 can also be set according to the actual situation. For example, the electrical connector 100 can be in the shape of a plate, a sheet or a strip. The following will take the electrical connector 100 as a square electrical connection row as an example for introduction. The two electrical connection parts 1 are arranged at intervals in the length direction of the electrical connector 100, and the part of the electrical connector 100 adjacent to and connected to the electrical connection part 1 forms an annular adjacent part 2, so that two annular adjacent parts 2 are formed at the two ends of the electrical connector 100 in the length direction corresponding to the two electrical connection parts 1, each annular adjacent part 2 is arranged around the periphery of a corresponding electrical connection part 1, and each annular adjacent part 2 is connected to a corresponding electrical connection part 1.

[0039] A part of the electrical connector 100 is recessed upward or downward relative to a part adjacent to the part, and the recessed part of the electrical connector 100 forms a buffer structure. The arrangement direction of the buffer structure includes at least two different horizontal directions, so that the buffer structure is a multi-directional buffer structure. In this way, when the electrical connector 100 provided with the multi-directional buffer structure connects two adjacent battery cells 210, the electrical connector 100 can provide a buffering effect in multiple directions through the multi-directional buffer structure. The electrical connector 100 can effectively absorb and disperse the expansion force generated by the battery cell 210 when it expands in multiple directions, avoiding damage to the connection position between the electrical connector 100 and the battery cell 210 due to excessive force on a single point.

[0040] The buffer structure can be arranged between the two electrical connection parts 1, that is, the buffer structure can be arranged at intervals with the two electrical connection parts 1; the buffer structure can also be arranged on the annular adjacent part 2, that is, the buffer structure can be connected to the electrical connection part 1. Then the electrical connector 100 can only be provided with a buffer structure between the two electrical connection parts 1; the electrical connector 100 can also be provided with a buffer structure only on one or two annular adjacent parts 2; the electrical connector 100 can also be provided with a buffer structure between the two electrical connection parts 1 and on one or two annular adjacent parts 2 at the same time.

[0041] The electrical connector 100 is provided with two electrical connection parts 1 respectively connecting two adjacent battery cells 210, and a recessed buffer structure is provided on the electrical connector 100 between the two electrical connection parts 1 and / or at least one position close to the electrical connection part 1. Since the buffer structure is a multi-directional buffer structure arranged along at least two different directions, when connecting two adjacent battery cells 210, the electrical connector 100 can provide a buffering effect in multiple directions through this multi-directional buffer structure. The electrical connector 100 can effectively absorb and disperse the expansion force generated by the battery cell 210 when it expands in multiple directions, avoiding damage to the connection position between the electrical connector 100 and the battery cell 210 due to excessive force on a single point, thereby preventing the problem of loose electrical connection or poor contact caused by the expansion of the battery cell 210, reducing the risk of short circuit, and improving the safety of the system. In addition, the setting of the multi-directional buffer structure can also increase the overall rigidity of the electrical connector 100, enhance its ability to resist external vibration and impact, and thus improve the stability and reliability of the battery device 1000. At the same time, the multi-directional buffer structure can also increase the surface area of ​​the electrical connector 100 in contact with the air, which is beneficial to the dissipation of heat. Especially when working in a high temperature environment, the multi-directional buffer structure can better maintain the battery temperature within a reasonable range, thereby improving the current carrying capacity of the electrical connector 100.

[0042] The embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0043] When a buffer structure is provided between the two electrical connection parts 1, the buffer structure between the two electrical connection parts 1 is defined as the first buffer structure 3, that is, the buffer structure includes the first buffer structure 3 provided between the two electrical connection parts 1. The first buffer structure 3 can be provided in an upward concave configuration; the first buffer structure 3 can also be provided in a downward concave configuration. Figure 1 , Figure 7 and Figure 8 In some embodiments, the first buffer structure 3 is recessed in a direction away from the battery cell 210. The first buffer structure 3 is recessed upward, that is, the first buffer structure 3 is raised upward, so that the first buffer structure 3 can avoid interference with the battery cell 210 located at the lower side of the electrical connector 100, while saving space between the poles 211, which is conducive to the small size design of the poles 211. The first buffer structure 3 is recessed upward as an example for description below.

[0044] There are many specific configurations of the first buffer structure 3. For example, the first buffer structure 3 may include a plurality of convex strips with different extending directions. Figures 1 to 5 In some embodiments, the first buffer structure 3 includes a first ridge 31 extending along a first direction, and a second ridge 32 extending along a second direction, wherein the first direction, the second direction, and the spacing directions of the two electrical connection portions 1 are different.

[0045] Specifically, the first buffer structure 3 includes a first convex strip 31 and a second convex strip 32 which are hollow and open at the bottom, the first convex strip 31 extends in a first direction, the second convex strip 32 extends in a second direction, and the first convex strip 31 and / or the second convex strip 32 extend in a straight line, an arc line, or a wavy line, etc., and the following will take the first convex strip 31 and the second convex strip 32 extending in a straight line as an example for introduction. The first direction and the second direction are different horizontal directions, and the first direction and the second direction are different from the length direction of the electrical connector 100.

[0046] The electrical connector 100 can reserve a buffer space in the horizontal direction perpendicular to the first direction through the first convex strip 31, and the electrical connector 100 can reserve a buffer space in the horizontal direction perpendicular to the second direction through the second convex strip 32. In this way, the electrical connector 100 can reserve a buffer space in the horizontal direction perpendicular to the first direction and in the horizontal direction perpendicular to the second direction through the first buffer structure 3.

[0047] Optionally, see Figures 1 to 5 In some embodiments, the electrical connector 100 has a first central axis perpendicular to the length direction of the electrical connector 100 and a second central axis perpendicular to the width direction of the electrical connector 100, and the first convex strip 31 and the second convex strip 32 are symmetrically arranged about the first central axis and the second central axis. In this way, the first buffer structure 3 is symmetrically arranged to achieve a uniform stress distribution design of the electrical connector 100, ensuring that the expansion force generated by the battery cell 210 is uniformly transmitted to the entire electrical connector 100, reducing the local stress concentration of the electrical connector 100.

[0048] Any end of the first ridge 31 may extend to the edge of the electrical connection portion 1; any end of the first ridge 31 may not extend to the edge of the electrical connection portion 1, that is, any end of the first ridge 31 is spaced from the edge of the electrical connection portion 1. Similarly, any end of the second ridge 32 may extend to the edge of the electrical connection portion 1; any end of the second ridge 32 may not extend to the edge of the electrical connection portion 1, that is, any end of the first ridge 31 is spaced from the edge of the electrical connection portion 1. Optionally, please refer to Figures 1 to 5 In some embodiments, two ends of the first convex strip 31 and / or the second convex strip 32 extend to two opposite edges of the electrical connector 100 in a direction perpendicular to the spacing direction of the electrical connector 1 .

[0049] Specifically, the two ends of the first ridge 31 can extend to two opposite edges of the electrical connector 100 in the width direction, so that the first ridge 31 penetrates the two ends of the electrical connector 100 in the width direction, which is not only conducive to making the length of the first ridge 31 as long as possible, but also conducive to allowing air to quickly pass through the bottom space of the first ridge 31, thereby accelerating the heat dissipation of the electrical connector 100. Similarly, the two ends of the second ridge 32 can also extend to two opposite edges of the electrical connector 100 in the width direction, so that the second ridge 32 penetrates the two ends of the electrical connector 100 in the width direction, which is not only conducive to making the length of the second ridge 32 as long as possible, but also conducive to allowing air to quickly pass through the bottom space of the second ridge 32, thereby accelerating the heat dissipation of the electrical connector 100.

[0050] The first convex strip 31 and the second convex strip 32 may intersect or not intersect, and the first convex strip 31 and the second convex strip 32 may be spliced ​​into a cross shape, an X shape, a V shape, or an eight-shaped shape. Figure 1 , Figure 7 and Figure 8 In some embodiments, the middle portion of the first ridge 31 and the middle portion of the second ridge 32 are arranged to intersect.

[0051] Specifically, the middle of the first convex strip 31 intersects with the middle of the second convex strip 32, so that the first convex strip 31 and the second convex strip 32 are spliced ​​into a cross shape such as a cross shape or an X shape, and the intersection of the cross shape forms a common buffer space that is perpendicular to the first direction and horizontally upward and perpendicular to the second direction. The first convex strip 31 and the second convex strip 32 are evenly distributed at the edge of the common buffer space along the circumferential direction, which is conducive to ensuring that the expansion force generated by the battery cell 210 is evenly transmitted to the entire electrical connector 100, reducing the local stress concentration of the electrical connector 100. At the same time, the cross shape can enhance the structural stability of the electrical connector 100 and improve the vibration resistance of the electrical connector 100.

[0052] The first convex strip 31 can be arranged in an uninterrupted whole strip; the first convex strip 31 can also be arranged in multiple discontinuous sections. Similarly, the second convex strip 32 can be arranged in an uninterrupted whole strip; the second convex strip 32 can also be arranged in multiple discontinuous sections. Figure 2 and Figure 3In some embodiments, the first ridge 31 includes a first ridge segment 311 and a second ridge segment 312 arranged at intervals in the first direction; the second ridge 32 includes a third ridge segment 321 and a fourth ridge segment 322 arranged at intervals in the second direction, the third ridge segment 321 is located on a side of the second ridge segment 312 close to the first ridge segment 311, and the third ridge segment 321 intersects with the first ridge segment 311, and the fourth ridge segment 322 is located on a side of the first ridge segment 311 close to the second ridge segment 312, and the fourth ridge segment 322 intersects with the second ridge segment 312.

[0053] Specifically, the first convex strip 31 is provided in two discontinuous sections, including a first convex strip section 311 and a second convex strip section 312 arranged at intervals, and the second convex strip 32 is also provided in two discontinuous sections, including a third convex strip section 321 and a fourth convex strip section 322 arranged at intervals. An end of the first convex strip section 311 close to the second convex strip section 312 intersects with an end of the third convex strip section 321 close to the fourth convex strip section 322, so that the first convex strip section 311 and the third convex strip section 321 are spliced ​​into a V shape. An end of the second convex strip section 312 close to the first convex strip section 311 intersects with an end of the fourth convex strip section 322 close to the third convex strip section 321, so that the second convex strip section 312 and the fourth convex strip section 322 are spliced ​​into a V shape. In this way, the first convex strip 31 and the second convex strip 32 are spliced ​​into two V shapes, so that the structure of the first buffer structure 3 is relatively simple, and it is also beneficial for air to quickly pass through the bottom space of the two V shapes, thereby accelerating the heat dissipation of the electrical connector 100.

[0054] For further information, see Figure 3 In some embodiments, the first buffer structure 3 further includes a fifth ridge segment 33 arranged in parallel with the first ridge segment 311, a sixth ridge segment 34 arranged in parallel with the second ridge segment 312, a seventh ridge segment 35 arranged in parallel with the third ridge segment 321, and an eighth ridge segment 36 arranged in parallel with the fourth ridge segment 322; the fifth ridge segment 33 is located on a side of the first ridge segment 311 away from the third ridge segment 321, the sixth ridge segment 34 is located on a side of the second ridge segment 312 away from the fourth ridge segment 322, the seventh ridge segment 35 is located on a side of the third ridge segment 321 away from the first ridge segment 311, and the eighth ridge segment 36 is located on a side of the fourth ridge segment 322 away from the second ridge segment 312.

[0055] Specifically, the fifth convex segment 33 and the sixth convex segment 34 are extended along the first direction, and the fifth convex segment 33 and the sixth convex segment 34 are respectively parallel or approximately parallel to the first convex segment 311 and the second convex segment 312. The seventh convex segment 35 and the eighth convex segment 36 are extended along the second direction, and the seventh convex segment 35 and the eighth convex segment 36 are respectively parallel or approximately parallel to the third convex segment 321 and the fourth convex segment 322. The electrical connector 100 can reserve a buffer space in the horizontal direction perpendicular to the first direction through the fifth convex segment 33 and the sixth convex segment 34, and the electrical connector 100 can reserve a buffer space in the horizontal direction perpendicular to the second direction through the seventh convex segment 35 and the eighth convex segment 36. At the same time, the fifth convex segment 33, the sixth convex segment 34, the seventh convex segment 35, and the eighth convex segment 36 are arranged on the electrical connector 100, which can not only further enhance the structural stability of the electrical connector 100, improve the vibration resistance of the electrical connector 100, but also further optimize the heat dissipation of the electrical connector 100.

[0056] The fifth convex strip segment 33 and the eighth convex strip segment 36 may not intersect or intersect. Figure 3 In some embodiments, the fifth rib segment 33 intersects with the eighth rib segment 36 . This is not only beneficial to reducing local stress concentration, but also beneficial to air flow in the bottom space between the fifth rib segment 33 and the eighth rib segment 36 .

[0057] One end of the fifth convex segment 33 intersects with one end of the eighth convex segment 36, and the end of the fifth convex segment 33 away from the eighth convex segment 36 may extend to the edge of the electrical connector 100; the end of the fifth convex segment 33 away from the eighth convex segment 36 may not extend to the edge of the electrical connector 100. Figure 3 In some embodiments, the end of the fifth ridge segment 33 away from the eighth ridge segment 36 extends to the edge of the electrical connector 100 .

[0058] Specifically, the fifth convex strip segment 33 extends to the edge of the electrical connector 100 , so that the fifth convex strip segment 33 passes through the end of the electrical connector 100 away from the eighth convex strip segment 36 in the width direction, which is conducive to allowing air to flow into the bottom space of the fifth convex strip segment 33 .

[0059] Similarly, the end of the eighth convex segment 36 away from the fifth convex segment 33 may extend to the edge of the electrical connector 100; the end of the eighth convex segment 36 away from the fifth convex segment 33 may not extend to the edge of the electrical connector 100. Figure 3 In some embodiments, the eighth ridge segment 36 extends to the edge of the electrical connector 100 from one end of the eighth ridge segment 36 away from the fifth ridge segment 33 .

[0060] Specifically, the eighth ridge segment 36 extends to the edge of the electrical connector 100 , so that the eighth ridge segment 36 passes through the end of the electrical connector 100 away from the fifth ridge segment 33 in the width direction, which helps air flow into the bottom space of the eighth ridge segment 36 .

[0061] The sixth convex strip segment 34 and the seventh convex strip segment 35 may not intersect or intersect. Figure 3 In some embodiments, the sixth rib segment 34 intersects with the seventh rib segment 35 . This is not only beneficial to reducing local stress concentration, but also beneficial for air to flow in the bottom space between the sixth rib segment 34 and the seventh rib segment 35 .

[0062] One end of the sixth convex segment 34 intersects with one end of the seventh convex segment 35, and the end of the sixth convex segment 34 away from the seventh convex segment 35 may extend to the edge of the electrical connector 100; the end of the sixth convex segment 34 away from the seventh convex segment 35 may not extend to the edge of the electrical connector 100. Figure 3 In some embodiments, the sixth convex segment 34 extends to the edge of the electrical connector 100 from one end of the sixth convex segment 34 away from the seventh convex segment 35 .

[0063] Specifically, the sixth convex segment 34 extends to the edge of the electrical connector 100 , so that the sixth convex segment 34 passes through the end of the electrical connector 100 away from the seventh convex segment 35 in the width direction, which is conducive to allowing air to flow into the bottom space of the sixth convex segment 34 .

[0064] Similarly, the end of the seventh convex segment 35 away from the sixth convex segment 34 may extend to the edge of the electrical connector 100; the end of the seventh convex segment 35 away from the sixth convex segment 34 may not extend to the edge of the electrical connector 100. Figure 3 In some embodiments, the seventh convex segment 35 extends to the edge of the electrical connector 100 at one end away from the sixth convex segment 34 .

[0065] Specifically, the seventh convex segment 35 extends to the edge of the electrical connector 100 , so that the seventh convex segment 35 passes through the end of the electrical connector 100 away from the sixth convex segment 34 in the width direction, which is conducive to allowing air to flow into the bottom space of the seventh convex segment 35 .

[0066] Optionally, see Figure 4 and Figure 5 In some embodiments, the first ridge 31 includes a first ridge segment 311 and a second ridge segment 312 arranged at intervals in the first direction; the second ridge 32 passes through the first ridge 31 from the interval between the first ridge segment 311 and the second ridge segment 312.

[0067] Specifically, the first ridge 31 is provided in two discontinuous sections, the first ridge 31 includes a first ridge section 311 and a second ridge section 312 arranged at intervals, the second ridge 32 is provided in an uninterrupted whole section, the middle portion of the second ridge 32 passes through the first ridge 31 from the discontinuity of the first ridge 31, so that the first ridge 31 and the second ridge 32 are spliced ​​into an X-shape, so that the structure of the first buffer structure 3 is relatively simple, and it is also conducive to allowing air to quickly pass through the bottom space of the first ridge 31 and the second ridge 32, thereby accelerating the heat dissipation of the electrical connector 100.

[0068] For further information, see Figure 5 In some embodiments, the first buffer structure 3 also includes a third ridge 37 extending along a third direction, the third ridge 37 is located on a side of the second ridge 32 close to the first ridge segment 311, and the third ridge 37 is located on a side of the first ridge segment 311 close to the second ridge segment 312.

[0069] Specifically, the extension direction of the third convex strip 37 is the third direction, and the electrical connector 100 can reserve a buffer space in a horizontal direction perpendicular to the third direction through the third convex strip 37. The extension direction of the third convex strip 37 can be a straight line, an arc line, or a wavy line, etc., and the following will take the extension direction of the third convex strip 37 as a straight line as an example for description.

[0070] The third ridge 37 and the second ridge 32 may be arranged in parallel or approximately in parallel, that is, the third direction is the same as the second direction; the third ridge 37 and the second ridge 32 may also be arranged at a preset angle, which may be a right angle, an acute angle or an obtuse angle. Figure 5 In some embodiments, the third direction is different from the first direction, the second direction, and the spacing direction of the two electrical connection parts 1. For example, the third ridge 37 is arranged at an angle to the second ridge 32, and the angle between the third ridge 37 and the second ridge 32 is an acute angle.

[0071] The end of the third convex strip 37 away from the first convex strip segment 311 may extend to the edge of the electrical connector 100; the end of the third convex strip 37 away from the first convex strip segment 311 may not extend to the edge of the electrical connector 100. Figure 5 In some embodiments, the third ridge 37 extends from one end of the first ridge segment 311 to the edge of the electrical connector 100 .

[0072] Specifically, the third ridge 37 extends to the edge of the electrical connector 100 , so that the third ridge 37 passes through the end of the electrical connector 100 away from the first ridge segment 311 in the width direction, which helps air flow into the bottom space of the third ridge 37 .

[0073] Optionally, see Figure 5In some embodiments, the first buffer structure 3 also includes a fourth ridge 38 extending along a fourth direction, the fourth ridge 38 is located on a side of the second ridge 32 close to the second ridge segment 312, and the fourth ridge 38 is located on a side of the second ridge segment 312 close to the first ridge segment 311.

[0074] Specifically, the extension direction of the fourth convex strip 38 is the fourth direction, and the electrical connector 100 can reserve a buffer space in a horizontal direction perpendicular to the fourth direction through the fourth convex strip 38. The extension direction of the fourth convex strip 38 can be a straight line, an arc line, or a wavy line, etc., and the following will take the extension direction of the fourth convex strip 38 as a straight line as an example for description.

[0075] The fourth ridge 38 and the second ridge 32 may be arranged in parallel or approximately in parallel, that is, the fourth direction and the second direction are the same direction; the fourth ridge 38 and the second ridge 32 may also be arranged at a preset angle, which may be a right angle, an acute angle or an obtuse angle. Figure 5 In some embodiments, the fourth direction is the same as the second direction. In this way, the electrical connector 100 can reserve more buffer space in a horizontal direction perpendicular to the second direction through the fourth convex strip 38 .

[0076] The end of the fourth ridge 38 away from the second ridge segment 312 may extend to the edge of the electrical connector 100; the end of the fourth ridge 38 away from the second ridge segment 312 may not extend to the edge of the electrical connector 100. Figure 5 In some embodiments, the fourth ridge 38 extends from one end of the second ridge segment 312 to the edge of the electrical connector 100 .

[0077] Specifically, the fourth ridge 38 extends to the edge of the electrical connector 100 , so that the fourth ridge 38 passes through the end of the electrical connector 100 away from the second ridge segment 312 in the width direction, which helps air flow into the bottom space of the fourth ridge 38 .

[0078] When a buffer structure is provided on one or two annular adjacent portions 2, the buffer structure provided on the annular adjacent portion 2 is defined as the second buffer structure 4, that is, the buffer structure includes the second buffer structure 4 provided on the annular adjacent portion 2. The second buffer structure 4 may be provided with one or two, optionally, see Figure 6 , Fig. 9 and Fig.10 In some embodiments, two second buffer structures 4 are respectively provided on the two annular adjacent portions 2 .

[0079] Specifically, the two electrical connection parts 1 are the connection positions between the electrical connector 100 and two adjacent battery cells 210, and two second buffer structures 4 are respectively arranged corresponding to the two electrical connection parts 1. Buffer space is reserved at the two electrical connection parts 1, which can avoid damage to the two connection positions of the electrical connector 100 and the battery cells 210 due to excessive force at a single point.

[0080] The second buffer structure 4 can be arranged in an upward concave configuration; the second buffer structure 4 can also be arranged in a downward concave configuration. Figure 6 , Fig. 9 and Fig.10 In some embodiments, the second buffer structure 4 is recessed in a direction close to the battery cell 210. The second buffer structure 4 is recessed downward, that is, the second buffer structure 4 is raised downward, so that the electrical connection portion 1 is protruded downward, so that the portion of the electrical connector 100 between the two electrical connection portions 1 can be prevented from interfering with the top of the battery cell 210, thereby affecting the connection between the electrical connection portion 1 and the pole 211 of the battery cell 210. The second buffer structure 4 is recessed downward as an example for description.

[0081] Optionally, see Figure 6 , Fig. 9 and Fig.10 In some embodiments, the second buffer structure 4 is arranged along the circumference of the electrical connection part 1. By arranging the second buffer structure 4 along the circumference of the electrical connection part 1, a buffer space can be reserved for the electrical connection part 1 in any horizontal direction, so that the electrical connection part 1 can swing 360 degrees relative to other parts of the electrical connector 100.

[0082] There are many specific implementation methods for the second buffer structure 4 to be arranged along the circumference of the electrical connection part 1. For example, the second buffer structure 4 can be an annular convex strip extending along the circumference of the electrical connection part 1; the second buffer structure 4 can also include a plurality of convex strips arranged at intervals along the circumference of the electrical connection part 1.

[0083] Optionally, see Figure 6 , Fig. 9 and Fig.10 In some embodiments, a through hole 5 is provided through the electrical connector 100, and the annular adjacent portion 2 includes a plurality of connecting arms 21 arranged at intervals along the circumference of the electrical connector 1, and the connecting arms 21 are formed by bending and extending from the inner hole wall of the through hole 5 along the recessed direction of the second buffer structure 4, and one end of the plurality of connecting arms 21 away from the inner hole wall of the through hole 5 is connected to the electrical connector 1, and the plurality of connecting arms 21 form a second buffer structure 4.

[0084] Specifically, two through-holes 5 are provided on the electrical connector 100 corresponding to the two electrical connecting parts 1, and the through-holes 5 penetrate the upper surface and the lower surface of the electrical connector 100. Each electrical connecting part 1 is located on the inner side and the lower side of a corresponding through-hole 5, and a gap is reserved between each electrical connecting part 1 and the inner hole wall of a corresponding through-hole 5 in the circumferential direction of the electrical connecting part 1. The annular adjacent part 2 (that is, the second buffer structure 4) adopts a flexible bridge structure, and the second buffer structure 4 includes a plurality of connecting arms 21 arranged at intervals along the circumference of the electrical connecting part 1. The upper end of the connecting arm 21 is connected to the inner hole wall of the through-hole 5, the lower end of the connecting arm 21 is connected to the electrical connecting part 1, and the connecting arm 21 is bent from top to bottom in a direction close to the electrical connecting part 1. When the battery device 1000 expands and deforms, the expansion deformation between two adjacent battery cells 210 can be buffered by the swing of the second buffer structure 4, so as to avoid the expansion deformation of the battery cell 210 causing damage to the connection position between the battery cell 210 and the electrical connector 100, thereby improving the reliability and safety of the electrical connection of the battery device 1000. Among them, the specific shape of the perforation 5 can be set according to actual conditions, and the perforation 5 can be a circular hole or a square hole. The shape of the perforation 5 can be compatible with or incompatible with the shape of the electrical connection part 1. For example, when the electrical connection part 1 is set in a circular shape, the perforation 5 can be a circular hole or a square hole.

[0085] The specific number of the connecting arms 21 can be set according to actual conditions. For example, the connecting arms 21 can be provided with two, three, four, five, six or more. Figure 6 , Fig. 9 and Fig.10 In some embodiments, the second buffer structure 4 includes four connecting arms 21, two of which are opposite to each other in the spacing direction of the two electrical connection parts 1, and the other two are opposite to each other in the direction perpendicular to the spacing direction of the electrical connection parts 1. The four connecting arms 21 evenly distributed along the circumference of the electrical connection part 1 form the second buffer structure 4, so that the structure of the second buffer structure 4 is relatively simple, and it is also conducive to realizing that the electrical connection part 1 can swing 360 degrees relative to other parts of the electrical connector 100.

[0086] The present disclosure also provides a battery device, Figures 7 to 10 Various embodiments of the battery device provided by the present disclosure are shown.

[0087] See also Figures 7 to 10 In some embodiments, the battery device 1000 includes an electrical connector 100 and a battery cell assembly 200 , wherein the battery cell assembly 200 includes a plurality of battery cells 210 , and poles 211 of two adjacent battery cells 210 are electrically connected to two electrical connection portions 1 of an electrical connector 100 , respectively.

[0088] Specifically, the battery device 1000 includes the above-mentioned electrical connector 100. Since the electrical connector 100 adopts the technical solution of the above-mentioned embodiment, it has the beneficial effects brought by the technical solution of the above-mentioned embodiment. Two adjacent battery cells 210 are electrically connected through an electrical connector 100. The electrical connection part 1 of the electrical connector 100 and the pole 211 of the battery cell 210 are usually welded. Figure 6 , Fig. 9 and Fig.10 In some embodiments, an observation hole 7 is provided on the electrical connection portion 1 , so that the welding condition between the electrical connection portion 1 and the pole 211 can be observed through the observation hole 7 .

[0089] An insulating layer (not shown in the figure) is usually provided between the battery cell assembly 200 and the electrical connector 100. Figures 7 to 10 In some embodiments, a positioning hole 6 is provided on the electrical connector 100 , and the positioning hole 6 is used to form a positioning match with the positioning column on the insulating layer, so as to achieve the installation and positioning of the electrical connector 100 .

[0090] See also Figures 7 to 10 In some embodiments, multiple battery cells 210 are arranged in multiple columns, wherein: the electrical connector 100 includes a first electrical connector 100a, and two electrical connecting portions 1 of the first electrical connector 100a are arranged at intervals in the arrangement direction of all the battery cells 210 in each column of battery cells 210, and two adjacent battery cells 210 in each column of battery cells 210 are electrically connected through a first electrical connector 100a; and / or, the electrical connector 100 includes a second electrical connector 100b, and two electrical connecting portions 1 of the second electrical connector 100b are arranged at intervals in the arrangement direction of multiple columns of battery cells 210, and two adjacent battery cells 210 in two adjacent columns of battery cells 210 are electrically connected through a second electrical connector 100b.

[0091] Specifically, all the cells 210 in the battery device 1000 are arranged in multiple columns, and the two poles 211 of each cell 210 are opposite in the width direction of the battery device 1000. Each column of cells 210 includes multiple cells 210 arranged along the length direction of the battery device 1000, and the multiple columns of cells 210 are arranged in parallel in the width direction of the battery device 1000.

[0092] The two electrical connection parts 1 of the first electrical connector 100a are opposite to each other in the length direction of the battery device 1000. In a single row of battery cells 210, one electrical connection part 1 of the first electrical connector 100a is connected to the pole 211 of one battery cell 210, and the other electrical connection part 1 is connected to the pole 211 of a battery cell 210 adjacent to the battery cell 210 in the length direction of the battery device 1000. The first electrical connector 100a can ensure that the expansion force generated by the battery cell 210 is stably transmitted and released between the battery cells 210 in the same row.

[0093] The two electrical connection parts 1 of the second electrical connector 100b are opposite to each other in the width direction of the battery device 1000. In two adjacent columns of battery cells 210, one electrical connection part 1 of the second electrical connector 100b is connected to the pole 211 of a battery cell 210 in one column of battery cells 210, and the other electrical connection part 1 is connected to the pole 211 of a battery cell 210 in another column of battery cells 210 that is adjacent to the battery cell 210 in the width direction of the battery device 1000. The second electrical connector 100b can ensure that the expansion force generated by the battery cell 210 is stably transmitted and released between the two adjacent columns of battery cells 210.

[0094] The present disclosure also provides an energy storage system, which may be an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage device, etc. The energy storage system includes the above-mentioned battery device 1000. Since the battery device 1000 adopts the technical solution of the above-mentioned embodiment, it has the beneficial effects brought by the technical solution of the above-mentioned embodiment.

[0095] The present disclosure also provides an electric device, which may be a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship or a spacecraft, etc. The electric device includes the above energy storage system, and since the energy storage system adopts the technical solution of the above embodiment, it has the beneficial effects brought by the technical solution of the above embodiment.

[0096] Those skilled in the art can understand that the above-mentioned embodiments are specific examples for realizing the present disclosure, and in practical applications, various changes can be made to them in form and details without departing from the spirit and scope of the present disclosure. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, so the protection scope of the present disclosure shall be based on the scope defined in the claims.

Claims

1. An electrical connector, characterized in that: The electrical connector includes two electrical connection parts arranged at intervals, the two electrical connection parts are used to electrically connect to the poles of two adjacent battery cells respectively, a part of the electrical connector is recessed along the thickness direction of the electrical connector, the recessed part of the electrical connector forms a buffer structure, and the buffer structure is arranged along at least two directions perpendicular to the thickness direction of the electrical connector, wherein: The buffer structure is arranged between the two electrical connection parts; and / or, The electrical connector also includes two annular adjacent portions, which respectively surround and connect the two electrical connecting portions, and at least one of the annular adjacent portions is provided with the buffer structure.

2. The electrical connector according to claim 1, characterized in that: The buffer structure includes a first buffer structure arranged between the two electrical connection parts, the first buffer structure includes a first convex strip extending along a first direction, and a second convex strip extending along a second direction, wherein the first direction, the second direction, and the spacing directions of the two electrical connection parts are different.

3. The electrical connector according to claim 2, characterized in that: The middle portion of the first convex strip is arranged to intersect with the middle portion of the second convex strip.

4. The electrical connector according to claim 2, characterized in that: The first convex strip includes a first convex strip segment and a second convex strip segment arranged at intervals in the first direction; the second convex strip includes a third convex strip segment and a fourth convex strip segment arranged at intervals in the second direction, the third convex strip segment is located on a side of the second convex strip segment close to the first convex strip segment, the third convex strip segment intersects with the first convex strip segment, the fourth convex strip segment is located on a side of the first convex strip segment close to the second convex strip segment, and the fourth convex strip segment intersects with the second convex strip segment.

5. The electrical connector according to claim 4, characterized in that: The first buffer structure further includes a fifth convex segment arranged in parallel with the first convex segment, a sixth convex segment arranged in parallel with the second convex segment, a seventh convex segment arranged in parallel with the third convex segment, and an eighth convex segment arranged in parallel with the fourth convex segment; The fifth convex segment is located on a side of the first convex segment away from the third convex segment, the sixth convex segment is located on a side of the second convex segment away from the fourth convex segment, the seventh convex segment is located on a side of the third convex segment away from the first convex segment, and the eighth convex segment is located on a side of the fourth convex segment away from the second convex segment.

6. The electrical connector according to claim 5, characterized in that: The fifth convex line segment intersects with the eighth convex line segment; and / or the sixth convex line segment intersects with the seventh convex line segment.

7. The electrical connector according to claim 2, characterized in that: The first convex strip includes a first convex strip segment and a second convex strip segment arranged at intervals in the first direction; the second convex strip passes through the first convex strip from the interval between the first convex strip segment and the second convex strip segment.

8. The electrical connector according to claim 7, characterized in that: The first buffer structure further includes a third ridge extending along a third direction, the third ridge is located on a side of the second ridge close to the first ridge segment, and the third ridge is located on a side of the first ridge segment close to the second ridge segment.

9. The electrical connector according to claim 7, characterized in that: The first buffer structure further includes a fourth ridge extending along a fourth direction, the fourth ridge being located on a side of the second ridge close to the second ridge segment, and the fourth ridge being located on a side of the second ridge segment close to the first ridge segment.

10. The electrical connector according to claim 1, characterized in that: The buffer structure includes a second buffer structure provided on the annular adjacent portion, and the second buffer structure is arranged along the circumference of the electrical connecting portion.

11. The electrical connector according to claim 10, characterized in that: A through hole is provided through the electrical connector, and the annular adjacent portion includes a plurality of connecting arms arranged at intervals along the circumference of the electrical connector, and the connecting arms are formed by bending and extending from the inner hole wall of the through hole along the recessed direction of the second buffer structure, and one end of the plurality of connecting arms away from the inner hole wall of the through hole is connected to the electrical connector, and the plurality of connecting arms form the second buffer structure.

12. The electrical connector according to claim 11, characterized in that: The second buffer structure includes four connecting arms, two of which are opposite to each other in a direction of spacing between the two electrical connecting portions, and the other two are opposite to each other in a direction perpendicular to the direction of spacing between the electrical connecting portions.

13. A battery device, characterized in that: include: An electrical connector, wherein the electrical connector is the electrical connector according to any one of claims 1 to 12; A battery cell assembly, the battery cell assembly comprises a plurality of battery cells, and poles of two adjacent battery cells are respectively electrically connected to two electrical connection parts of one electrical connector.

14. An energy storage system, characterized in that: Comprising the battery device as claimed in claim 13.

15. An electrical equipment, characterized in that: Comprising the energy storage system as claimed in claim 14.

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