An adapter assembly, an energy storage device and an electrical equipment

Abstract

The present application relates to an adapter assembly, an energy storage device, and an electrical equipment. The adapter assembly includes: an adapter plate and a buckle member. The adapter plate includes a first adapter portion, a first bending portion, a connecting portion, a second bending portion, and a second adapter portion that are connected in sequence. Along a first direction, the first adapter portion, the connecting portion, and the second adapter portion are stacked in sequence. The buckle member is inserted into the connecting portion. Part of the buckle member is located between the first adapter portion and the connecting portion, and part of the buckle member is located between the connecting portion and the second adapter portion. The buckle member is used to form a first gap between the first adapter portion and the connecting portion and a second gap between the second adapter portion and the connecting portion. The adapter assembly can be bent twice and has high consistency and assembly yield.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and particularly relates to an adapter assembly, an energy storage device and an electrical equipment. Background Art

[0002] With the continuous development of secondary batteries, people have higher and higher requirements for their various performances, especially for the energy density per unit volume. In order to improve the energy density per unit volume of secondary batteries, the volume of the wound electrode assembly is often increased. However, when the volume of the wound electrode assembly is too large, it will affect the wetting effect of the electrolyte on the wound electrode assembly. In order to improve the overall wetting effect of the wound electrode assembly, an adapter end is often extended from one end of the current collector plate to form a gap between the current collector plate and the top cover, so that the electrolyte can be filled and infiltrated downward. However, when the top cover and the housing of the electrode assembly are welded and sealed, the adapter end of the current collector plate needs to be bent. The adapter end has a certain yield strength and is prone to interfere with the top cover and the housing during bending, causing misalignment when the top cover and the housing are welded, resulting in micro-deformation of the housing, thereby reducing the connection stability between the housing and the top cover and the safety performance of the secondary battery. Summary of the Invention

[0003] In view of this, the present application provides an adapter assembly, an energy storage device and an electrical equipment. The adapter assembly can be bent twice, and has high consistency and assembly yield.

[0004] The present application provides an adapter assembly, which includes: an adapter piece and a buckle piece. The adapter piece includes a first adapter part, a first bending part, a connecting part, a second bending part and a second adapter part connected in sequence; along the first direction, the first adapter part, the connecting part and the second adapter part are stacked in sequence; the buckle piece is inserted into the connecting part, and part of the buckle piece is located between the first adapter part and the connecting part, and part of the buckle piece is located between the connecting part and the second adapter part. The buckle piece is used to make a first gap between the first adapter part and the connecting part, and make a second gap between the second adapter part and the connecting part.

[0005] Further, the value L1 of the first gap satisfies the range: 1.5 mm ≤ L1 ≤ 4 mm; the value L2 of the second gap satisfies the range: 1.5 mm ≤ L2 ≤ 4 mm.

[0006] Further, the first bending part is arc-shaped, and the radius of curvature r1 of the first bending part satisfies the range: 1 mm ≤ r1 ≤ 2 mm; the second bending part is arc-shaped, and the radius of curvature r2 of the second bending part satisfies the range: 1 mm ≤ r2 ≤ 2 mm.

[0007] Further, the connecting portion includes a main body portion and a plurality of convex ribs, wherein the plurality of convex ribs are protrudingly arranged on the main body portion, the convex ribs are connected to the main body portion, and along the second direction, the opposite ends of the main body portion are respectively connected to the first bending portion and the second bending portion, and the length direction of the plurality of convex ribs is parallel to the second direction; wherein the second direction is the length direction of the connecting portion, and the second direction intersects with the first direction.

[0008] Further, the thickness of the first bending portion is smaller than the thickness of the first transition portion; the thickness of the second bending portion is smaller than the thickness of the second transition portion.

[0009] Further, a ratio a of the thickness of the first bending portion to the thickness of the first transition portion satisfies the range: 0.45≤a≤0.9; a ratio b of the thickness of the second bending portion to the thickness of the second transition portion satisfies the range: 0.45≤b≤0.9.

[0010] Further, along a direction perpendicular to the second direction, at least one of two opposite ends of the first bending portion is provided with a notch, and at least one of two opposite ends of the second bending portion is provided with a notch.

[0011] Further, the buckle component includes a first buckle component and a second buckle component, the first buckle component and the second buckle component are inserted in the connecting portion at intervals, the first buckle component is at least partially inserted between the first adapter portion and the connecting portion, and is arranged close to the first bending portion, and the first buckle component is used to make a first gap between the first adapter portion and the connecting portion; the second buckle component is at least partially inserted between the second adapter portion and the connecting portion, and is arranged close to the second bending portion, and the second buckle component is used to make a second gap between the two adapter portions and the connecting portion.

[0012] Furthermore, the first clip component and the second clip component each include a first clip portion, a second clip portion and a third clip portion which are bent and connected in sequence; the first clip portion and the third clip portion are respectively located on the same side of the second clip portion, and along the first direction, the first clip portion and the third clip portion are stacked.

[0013] Further, the first clamping portion includes a first clamping body and a first protrusion, the first protrusion is arranged on the surface of the first clamping body away from the third clamping portion; the third clamping portion includes a second clamping body and a second protrusion, the second protrusion is arranged on the surface of the second clamping body away from the first clamping portion, and the first protrusion and the second protrusion are arranged at the same end of the first clip component; the first protrusion and the second protrusion of the first clip component are both arranged away from the second clip component; the first protrusion and the second protrusion of the second clip component are both arranged away from the first clip component.

[0014] Furthermore, the first clamping portion also includes a third protrusion, which is arranged on the surface of the first clamping body away from the third clamping portion, and is arranged at an end of the first clamping body away from the first protrusion; the third clamping portion also includes a fourth protrusion, which is arranged on the surface of the second clamping body away from the second clamping portion, and is arranged at an end of the second clamping body away from the second protrusion.

[0015] Further, the fastener includes a first part, a second part and a third part that are connected to each other, the first part and the third part are respectively located on the same side of the second part, and the first part and the third part are stacked along the first direction, the first part includes a first main body part and a fifth protrusion, the number of the fifth protrusions is two, the two fifth protrusions are both arranged on the surface of the first main body part away from the third part, and are respectively arranged at opposite ends of the first main body part; the third part includes a second main body part and a sixth protrusion, the number of the sixth protrusions is two, the two sixth protrusions are both arranged on the surface of the second main body part away from the first part, and are respectively arranged at opposite ends of the second main body part.

[0016] Further, the snap fastener includes a first column portion, a straight rod portion and a second column portion which are bent and connected in sequence, the first column portion and the second column portion are respectively located on the same side of the straight rod portion, the first column portion is located between the first adapter portion and the connecting portion, and abuts against the first bent portion; the straight rod portion is located on one side of the adapter plate; the second column portion is located between the second adapter portion and the connecting portion, and abuts against the second bent portion.

[0017] Furthermore, the diameter d1 of the first column portion satisfies the range of 2mm≤d1≤3.5mm; the diameter d2 of the second column portion satisfies the range of 2mm≤d2≤3.5mm.

[0018] The present application also provides an energy storage device, which includes: an electrode assembly, a current collecting disk, a adapter assembly provided in the present application, and an end cap assembly, wherein the current collecting disk is located on one side of the electrode assembly and is electrically connected to the electrode assembly; the adapter assembly is located on a side of the current collecting disk away from the electrode assembly, and a second adapter portion of the adapter assembly is electrically connected to the current collecting disk; the end cap assembly is arranged on a side of the adapter assembly away from the electrode assembly, and is electrically connected to the first adapter portion of the adapter assembly; wherein, along the first direction, an end portion of the second bend portion away from the second adapter portion is closer to the end cap assembly than an end portion of the first bend portion away from the first adapter portion.

[0019] The present application also provides an electrical device, which includes a device body and an energy storage device provided in the present application, and the energy storage device supplies power to the device body.

[0020] In an embodiment of the present application, the adapter piece includes a connected first adapter portion, a first bending portion, a connecting portion, a second bending portion, and a second adapter portion. The adapter piece is bent twice. Along the first direction, the first adapter portion, the connecting portion, and the second adapter portion are stacked in sequence. The adapter piece is bent at the positions of the first bending portion and the second bending portion, improving the bending process of the adapter piece. When the adapter assembly is applied to an energy storage device and welds the end cover assembly and the housing of the energy storage device, the adapter piece can avoid squeezing the end cover assembly and the housing of the energy storage device, preventing the end cover assembly and the housing of the energy storage device from being welded out of alignment, and improving the consistency and assembly yield of the adapter assembly and the energy storage device. In an embodiment of the present application, the buckle is inserted into the connecting portion, and a part of the buckle is located between the first adapter portion and the connecting portion. The buckle is used to form a first gap between the first adapter portion and the connecting portion, which is beneficial to preventing the distance between the first adapter portion and the connecting portion from being too close to form an electric arc. When the adapter assembly is applied to an energy storage device, it can avoid the explosion of the adapter assembly due to electric arc sparks, which is beneficial to improving the safety performance of the adapter assembly and the energy storage device. In addition, the buckle can prevent the connection between the first adapter portion and the connecting portion from being bent excessively, reducing the risk of breakage of the first adapter portion and the connecting portion, and improving the assembly yield of the adapter assembly. A part of the buckle is located between the connecting portion and the second adapter portion. The buckle is used to form a second gap between the second adapter portion and the connecting portion, which is beneficial to preventing the distance between the connecting portion and the second adapter portion from being too close to form an electric arc. When the adapter assembly is applied to an energy storage device, it can avoid the explosion of the adapter assembly due to electric arc sparks, which is beneficial to improving the safety performance of the adapter assembly and the energy storage device. In addition, the buckle can prevent the connection between the connecting portion and the second adapter portion from being bent excessively, reducing the risk of breakage of the connecting portion and the second adapter portion, and improving the assembly yield of the adapter assembly. Furthermore, the buckle is inserted into the connecting portion, so that when the adapter assembly is applied to an energy storage device, the current collector plate can be welded or riveted to the adapter piece first, and then the buckle is inserted between the first bending portion and the connecting portion, improving the installation convenience of the buckle. Compared with the scheme of sleeving the buckle on the adapter piece first and then welding or riveting the current collector plate to the adapter piece, the scheme provided by the embodiment of the present application can avoid melting the buckle at high temperature during welding or riveting, which is beneficial to extending the service life of the buckle and the adapter piece. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0022] Figure 1 Structural schematic diagram of an energy storage system according to an embodiment of the present application;

[0023] Figure 2 Circuit block diagram of an energy storage system according to an embodiment of the present application;

[0024] Figure 3 Structural schematic diagram of an adapter assembly according to an embodiment of the present application;

[0025] Figure 4 Structural schematic diagram of an adapter plate according to an embodiment of the present application;

[0026] Figure 5 Expanded schematic diagram of an adapter plate according to an embodiment of the present application;

[0027] Figure 6 Structural schematic diagram of a buckle according to an embodiment of the present application;

[0028] Figure 7 Structural schematic diagram of a buckle according to another embodiment of the present application;

[0029] Figure 8 Structural schematic diagram of a buckle according to another embodiment of the present application;

[0030] Figure 9 Structural schematic diagram of an adapter assembly according to another embodiment of the present application;

[0031] Figure 10 Structural schematic diagram of a buckle according to another embodiment of the present application;

[0032] Figure 11 Structural schematic diagram of an adapter assembly according to another embodiment of the present application;

[0033] Figure 12 Structural schematic diagram of a buckle according to another embodiment of the present application;

[0034] Figure 13 Structural schematic diagram of an energy storage device according to an embodiment of the present application;

[0035] Figure 14 Exploded structural schematic diagram of an energy storage device according to an embodiment of the present application;

[0036] Figure 15 Circuit block diagram of an electrical equipment according to an embodiment of the present application;

[0037] Figure 16 This is a schematic diagram of the structure of an electrical device according to an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 100-adapter assembly, 110-adapter sheet, 111-first adapter portion, 1111-first side, 112-connecting portion, 1121-first surface, 1122-main body, 1123-convex rib, 1124-third side, 113-second adapter portion, 1131-fifth side, 114-first bending portion, 1141-second side, 1142-notch, 115-second bending portion, 1151-fourth side, 130-fastener, 131-first fastener sub-member, 132-second fastener sub-member, 133-first fastening portion, 1331-first fastening body, 1332-first protruding portion, 1333-third protruding portion, 134-second fastening portion, 135-third Clamping part, 1351-second clamping body, 1352-second protruding part, 1353-fourth protruding part, 136-first part, 1361-first body part, 1362-fifth protruding part, 137-second part, 138-third part, 1381-second body part, 1382-sixth protruding part, 1383-accommodating cavity, 139-first column part, 140-straight rod part, 141-second column part, 142-insertion port, 200-energy storage device, 210-electrode assembly, 220-collecting plate, 230-end cover assembly, 240-shell, 300-electrical equipment, 310-equipment body, 400-energy storage system, 410-user load, 420-electric energy conversion device. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0042] References to "embodiments" or "implementations" in this document mean that the specific features, structures, or characteristics described in connection with the embodiments or implementations may be included in at least one embodiment of the present application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment 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.

[0043] To increase the energy density per unit volume of a secondary battery, the volume of a wound electrode assembly is often increased. However, when the volume of the wound electrode assembly is too large, it will affect the wetting effect of the electrolyte on the wound electrode assembly. To improve the overall wetting effect of the wound electrode assembly, a transfer end is often extended from one end of the current collector plate. The opposite ends of the transfer end are respectively connected to the current collector plate and the pole post of the top cover to form a gap between the current collector plate and the top cover, allowing the electrolyte to fill and wet downward.

[0044] However, when welding and sealing the top cover and the housing of the electrode assembly, it is necessary to bend the transfer end of the current collector plate. The transfer end has a certain yield strength and is prone to interfere with the top cover and the housing during bending, causing misalignment when the top cover and the housing are welded, resulting in micro-deformation of the housing, thereby reducing the connection stability between the housing and the top cover and the safety performance of the secondary battery. In addition, in a secondary battery, the tab of the electrode assembly is electrically connected to the pole post of the top cover through the current collector plate and the transfer end to lead out the electrical energy of the electrode assembly. When the housing and the top cover fall off and disconnect due to unstable welding, it may affect the electrical connection stability between the current collector plate and the tab of the electrode assembly, the electrical connection stability between the current collector plate and the transfer end, and the electrical connection stability between the transfer end and the pole post of the top cover, reducing the electrical connection stability and cycle performance of the secondary battery. Moreover, the creases of the current collector plate and the transfer end often cannot be kept uniform, reducing the assembly yield and production efficiency of the secondary battery.

[0045] Since the energy required by people has strong temporality and spatiality, in order to rationally utilize energy and improve the energy utilization rate, it is necessary to store one form of energy in the same or converted into another form of energy through a medium or device and release it in a specific energy form based on future application needs. As is well known, to achieve the major goal of carbon neutrality, the current main way to generate green electric energy is to develop green energy such as photovoltaic and wind power to replace fossil energy.

[0046] Currently, the generation of green electricity generally relies on photovoltaics, wind power, water potential, etc. Wind energy and solar energy generally have problems such as strong intermittency and large volatility, which can cause grid instability. During peak electricity consumption, there is not enough electricity, while during low electricity consumption periods, there is too much electricity. The unstable voltage can also damage the power. Therefore, due to insufficient electricity demand or insufficient grid acceptance capacity, the problem of "abandoning wind and light" may occur. To solve these problems, energy storage is required. That is, electrical energy is converted into other forms of energy through physical or chemical means and stored, and the energy is converted back into electrical energy and released when needed. Simply put, energy storage is similar to a large "portable power bank". When photovoltaics and wind energy are sufficient, electrical energy is stored, and the stored electrical energy is released when needed.

[0047] Taking electrochemical energy storage as an example, this solution provides an energy storage device. There is a chemical battery inside the energy storage device, which mainly uses the chemical elements in the battery as the energy storage medium. The charge and discharge process is accompanied by chemical reactions or changes of the energy storage medium. Simply put, the electrical energy generated by wind energy and solar energy is stored in the chemical battery, and the stored electricity is released for use when the external electricity consumption reaches a peak, or transferred to places with a shortage of electricity for further use.

[0048] Currently, the application scenarios of current energy storage (i.e., energy storage) are relatively extensive, including power generation side energy storage, grid side energy storage, renewable energy grid connection energy storage, and user side energy storage, etc. The types of corresponding energy storage devices include:

[0049] (1) The large energy storage container applied in the grid side energy storage scenario can be used as a high-quality active and reactive power regulation power source in the grid, realizing the load matching of electrical energy in time and space, enhancing the consumption capacity of renewable energy, and being of great significance in grid system standby, relieving the power supply pressure during peak loads, and peak shaving and frequency modulation;

[0050] (2) The small and medium-sized energy storage cabinets applied in the industrial and commercial energy storage scenarios (such as banks, shopping malls, etc.) on the user side and the household small energy storage boxes applied in the household energy storage scenarios on the user side mainly operate in the mode of "peak shaving and valley filling". Since there is a large price difference in electricity bills at peak and valley positions according to electricity consumption demand, after users have energy storage devices, in order to reduce costs, they usually charge the energy storage cabinets / boxes during the low electricity price period; during the peak electricity price period, the electricity in the energy storage device is released for use to achieve the purpose of saving electricity bills. In addition, in remote areas and areas with high incidences of natural disasters such as earthquakes and hurricanes, the existence of household energy storage devices is equivalent to users providing backup power for themselves and the grid, eliminating the inconvenience caused by frequent power outages due to disasters or other reasons.

[0051] Please refer to Figure 1 and Figure 2 , Figure 1 is the application scenario diagram of the energy storage system 400 provided by the embodiments of this application. This applicationFigure 1 The embodiments are described by taking the household energy storage scenario in user-side energy storage as an example. The energy storage device of the present application is not limited to the household energy storage scenario.

[0052] The present application provides a household energy storage system 400, which includes an electric energy conversion device 420, a user load 410, and an energy storage device 200. The electric energy conversion device 420 is electrically connected to the user load 410 and the energy storage device 200 respectively. The electric energy conversion device 420 is used to convert other forms of energy into electric energy, and a part of the electric energy converted by the electric energy conversion device 420 is stored in the energy storage device 200, and a part is used to supply power to the user load 410. The energy storage device 200 is used to store electric energy and supply it to the user load 410 during peak electricity prices. The household energy storage system 400 can not only convert other forms of energy into electric energy, but also store the electric energy in the energy storage device 200 to supply sufficient electric energy to the user load 410.

[0053] Optionally, the electric energy conversion device 420 can convert at least one of solar energy, light energy, wind energy, thermal energy, tidal energy, biomass energy, and mechanical energy into electric energy to provide a stable power supply for the user load 410 and the energy storage device 200.

[0054] Optionally, the energy storage device 200 is a small energy storage box, which can be installed on an outdoor wall by wall-mounted means.

[0055] Optionally, the electric energy conversion device 420 can be a photovoltaic panel, and the photovoltaic panel can convert solar energy into electric energy during off-peak electricity prices and store it in the energy storage device 200.

[0056] Optionally, the user load 410 can be a street lamp or household appliances, etc. The energy storage device 200 is used to store the electric energy and supply it to the street lamp and household appliances for use during peak electricity prices, or supply power when the power grid is powered off / out of power.

[0057] It can be understood that the energy storage device 200 can include but is not limited to single cells, battery modules, battery packs, battery systems, etc. When the energy storage device 200 is a single cell, the energy storage device 200 can be at least one of cylindrical batteries, square batteries, etc.

[0058] Please refer to Figures 3 to 6 , the present application provides an adapter assembly 100, which includes: an adapter plate 110 and a buckle 130. The adapter plate 110 includes a first adapter portion 111, a first bending portion 114, a connecting portion 112, a second bending portion 115, and a second adapter portion 113 connected in sequence; along the first direction (such as Figure 3On the X shown in the figure, the first adapter portion 111, the connecting portion 112, and the second adapter portion 113 are stacked in sequence; the buckle member 130 is inserted into the connecting portion 112, and a part of the buckle member 130 is located between the first adapter portion 111 and the connecting portion 112, and a part is located between the connecting portion 112 and the second adapter portion 113. The buckle member 130 is used to form a first gap between the first adapter portion 111 and the connecting portion 112, and a second gap between the second adapter portion 113 and the connecting portion 112.

[0059] Understandably, the adapter assembly 100 can be applied to the energy storage device 200. The energy storage device 200 includes an electrode assembly 210, a current collector plate 220, an end cap assembly 230, and a housing 240. The housing 240 is connected to the end cap assembly 230. The electrode assembly 210 is received in the housing 240. Opposite ends of the current collector plate 220 are electrically connected to the electrode assembly 210 and the adapter assembly 100 respectively. One end of the adapter assembly 100 facing away from the current collector plate 220 is electrically connected to the end cap assembly 230.

[0060] Understandably, along the first direction, the first adapter portion 111, the connecting portion 112, and the second adapter portion 113 are stacked in sequence. The first direction is the thickness direction of the adapter sheet 110.

[0061] Optionally, the material of the adapter sheet 110 is selected from at least one of aluminum, copper, nickel, chromium, etc. The adapter sheet 110 is made of metal and can conduct electricity. When the adapter assembly 100 is applied to the energy storage device 200, the electrical energy of the electrode assembly 210 is conducted to the end cap assembly 230 through the current collector plate 220 and the adapter sheet 110 to realize the charge and discharge process of the energy storage device 200.

[0062] Optionally, the material of the buckle member 130 is selected from at least one of plastics, rubbers, etc. The buckle member 130 is an insulating member. When the buckle member 130 is clamped on the connecting portion 112, it can avoid being electrically connected to the adapter sheet 110.

[0063] Understandably, the first gap refers to the distance from the end of the first adapter portion 111 facing the connecting portion 112 to the end of the connecting portion 112 facing the first adapter portion 111 along the first direction. The second gap refers to the distance from the end of the second adapter portion 113 facing the connecting portion 112 to the end of the connecting portion 112 facing the second adapter portion 113 along the first direction.

[0064] In an embodiment of the present application, the adapter piece 110 includes a connected first adapter portion 111, a first bending portion 114, a connecting portion 112, a second bending portion 115, and a second adapter portion 113. The adapter piece 110 is bent twice, and along the first direction, the first adapter portion 111, the connecting portion 112, and the second adapter portion 113 are stacked in sequence. The adapter piece 110 is bent at the positions of the first bending portion 114 and the second bending portion 115, improving the bending process of the adapter piece 110. When the adapter assembly 100 is applied to the energy storage device 200 and welding the end cover assembly 230 and the housing 240 of the energy storage device 200, the adapter piece 110 can avoid squeezing the end cover assembly 230 and the housing 240 of the energy storage device 200, avoiding welding misalignment of the end cover assembly 230 and the housing 240 of the energy storage device 200, and improving the consistency and assembly yield of the adapter assembly 100 and the energy storage device 200. In an embodiment of the present application, the buckle 130 is inserted into the connecting portion 112, and a part of the buckle 130 is located between the first adapter portion 111 and the connecting portion 112. The buckle 130 is used to make the first adapter portion 111 and the connecting portion 112 have a first gap, which is beneficial to preventing the first adapter portion 111 and the connecting portion 112 from being too close to form an arc. When the adapter assembly 100 is applied to the energy storage device 200, it can avoid the explosion of the adapter assembly 100 due to arc sparks, which is beneficial to improving the safety performance of the adapter assembly 100 and the energy storage device 200; in addition, the buckle 130 can prevent the connection between the first adapter portion 111 and the connecting portion 112 from being bent excessively, reducing the risk of breakage of the first adapter portion 111 and the connecting portion 112, and improving the assembly yield of the adapter assembly 100. A part of the buckle 130 is located between the connecting portion 112 and the second adapter portion 113. The buckle 130 is used to make the second adapter portion 113 and the connecting portion 112 have a second gap, which is beneficial to preventing the connecting portion 112 and the second adapter portion 113 from being too close to form an arc. When the adapter assembly 100 is applied to the energy storage device 200, it can avoid the explosion of the adapter assembly 100 due to arc sparks, which is beneficial to improving the safety performance of the adapter assembly 100 and the energy storage device 200; in addition, the buckle 130 can prevent the connection between the connecting portion 112 and the second adapter portion 113 from being bent excessively, reducing the risk of breakage of the connecting portion 112 and the second adapter portion 113, and improving the assembly yield of the adapter assembly 100.Furthermore, the buckle member 130 is inserted into the connecting portion 112. When the adapter assembly 100 is applied to the energy storage device 200, the current collector plate 220 and the adapter piece 110 can be first welded or riveted together, and then the buckle member 130 is inserted between the first bending portion 114 and the connecting portion 112, which improves the installation convenience of the buckle member 130. Compared with the solution of first sleeving the buckle member 130 on the adapter piece 110 and then welding or riveting the current collector plate 220 and the adapter piece 110, the solution provided by the embodiment of the present application can avoid melting the buckle member 130 at high temperature during welding or riveting, which is beneficial to extending the service life of the buckle member 130 and the adapter piece 110.

[0065] In some embodiments, the connecting portion 112 has a first surface 1121 facing the second adapter portion 113. The orthographic projection of the first adapter portion 111 on the first surface 1121 falls within the range of the first surface 1121, and the orthographic projection of the second adapter portion 113 on the first surface 1121 falls within the range of the first surface 1121.

[0066] In this embodiment, the orthographic projections of the first adapter portion 111 and the second adapter portion 113 on the first surface 1121 both fall within the range of the first surface 1121. Then, when the adapter assembly 100 is applied to the energy storage device 200 and the end cover assembly 230 and the housing 240 of the energy storage device 200 are welded, the adapter piece 110 can avoid squeezing the end cover assembly 230 and the housing 240 of the energy storage device 200, and avoid welding misalignment of the end cover assembly 230 and the housing 240 of the energy storage device 200, thereby improving the safety performance and assembly yield of the adapter assembly 100 and the energy storage device 200.

[0067] It can be understood that the opposite ends of the first bending portion 114 are respectively connected to the first adapter portion 111 and the connecting portion 112, and the opposite ends of the second bending portion 115 are respectively connected to the connecting portion 112 and the second adapter portion 113; the buckle member 130 is partially disposed near the first bending portion 114 and partially disposed near the second bending portion 115.

[0068] In an embodiment of the present application, the clip 130 is partially disposed near the first bending portion 114, which is beneficial to preventing the first adapter portion 111 and the connecting portion 112 from being too close to form an arc. When the adapter assembly 100 is applied to the energy storage device 200, it can avoid the explosion of the adapter assembly 100 due to arc sparks, which is beneficial to improving the safety performance of the adapter assembly 100 and the energy storage device 200. In addition, the clip 130 can increase the radius of curvature of the first bending portion 114, prevent the first bending portion 114 from being excessively bent, avoid the first bending portion 114 reaching the stress limit and breaking, reduce the risk of the first adapter portion 111 and the connecting portion 112 breaking, and improve the assembly yield of the adapter assembly 100. The clip 130 is partially disposed near the second bending portion 115, which is beneficial to preventing the connecting portion 112 and the second adapter portion 113 from being too close to form an arc. When the adapter assembly 100 is applied to the energy storage device 200, it can avoid the explosion of the adapter assembly 100 due to arc sparks, which is beneficial to improving the safety performance of the adapter assembly 100 and the energy storage device 200. In addition, the clip 130 can increase the radius of curvature of the second bending portion 115, prevent the second bending portion 115 from being excessively bent, avoid the second bending portion 115 reaching the stress limit and breaking, reduce the risk of the connecting portion 112 and the second adapter portion 113 breaking, and improve the assembly yield of the adapter assembly 100.

[0069] Optionally, in some embodiments, the value L1 of the first gap satisfies the range: 1.5 mm ≤ L1 ≤ 4 mm. Specifically, the value of the first gap L1 can be, but is not limited to, 1.5 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, 3.1 mm, 3.3 mm, 3.5 mm, 3.8 mm, 3.9 mm, and 4 mm, etc.

[0070] In this embodiment, when the value L1 of the first gap satisfies the range of 1.5mm≤L1≤4mm, then along the first direction, the distance from the end of the first adapter part 111 facing the connecting part 112 to the end of the connecting part 112 facing the first adapter part 111 is within a reasonable range, which is conducive to preventing the first adapter part 111 and the connecting part 112 from being too close to form an arc. When the adapter assembly 100 is applied to the energy storage device 200, the adapter assembly 100 can be prevented from exploding due to arc sparks, which is conducive to improving the safety performance of the adapter assembly 100 and the energy storage device 200. When the value of the first gap is greater than 4mm, the distance from the end of the first adapter part 111 facing the connecting part 112 to the end of the connecting part 112 facing the first adapter part 111 is too large, which is not conducive to realizing the flat design of the adapter assembly 100. When the value of the first gap is less than 1.5 mm, the distance between the end of the first adapter part 111 facing the connecting part 112 and the end of the connecting part 112 facing the first adapter part 111 is too small. When the adapter assembly 100 is applied to the energy storage device 200, the risk of arc sparks and explosion due to the close distance between the first adapter part 111 and the connecting part 112 is increased, thereby reducing the safety performance of the adapter assembly 100 and the energy storage device 200.

[0071] In some embodiments, the value L2 of the second gap satisfies the range of 1.5 mm ≤ L1 ≤ 4 mm. Specifically, the value of the second gap L2 can be, but is not limited to, 1.5 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, 3.1 mm, 3.3 mm, 3.5 mm, 3.8 mm, 3.9 mm, and 4 mm.

[0072] In this embodiment, when the value L2 of the second gap satisfies the range 1.5 mm ≤ L2 ≤ 4 mm, then along the first direction, the distance from the end of the second transfer portion 113 facing the connection portion 112 to the end of the connection portion 112 facing the second transfer portion 113 is within a reasonable range, which is conducive to preventing an arc from forming due to the connection portion 112 and the second transfer portion 113 being too close. When the transfer assembly 100 is applied to the energy storage device 200, it can avoid the transfer assembly 100 from exploding due to arc sparks, which is beneficial to improving the safety performance of the transfer assembly 100 and the energy storage device 200. When the value L2 of the second gap is greater than 4 mm, the distance from the end of the second transfer portion 113 facing the connection portion 112 to the end of the connection portion 112 facing the second transfer portion 113 is too large, which is not conducive to achieving the flat design of the transfer assembly 100. When the value L2 of the second gap is less than 1.5 mm, the distance from the end of the second transfer portion 113 facing the connection portion 112 to the end of the connection portion 112 facing the second transfer portion 113 is too small. When the transfer assembly 100 is applied to the energy storage device 200, it increases the risk of arc sparks and explosion due to the second transfer portion 113 and the connection portion 112 being too close, and reduces the safety performance of the transfer assembly 100 and the energy storage device 200.

[0073] In some embodiments, the first bending portion 114 is arc-shaped, and the curvature radius r1 of the first bending portion 114 satisfies the range: 1 mm ≤ r1 ≤ 2 mm. Specifically, the value of the curvature radius r1 of the first bending portion 114 is 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc.

[0074] In the embodiments of the present application, when the curvature radius r1 of the first bending portion 114 satisfies the range 1 mm ≤ r1 ≤ 2 mm, the curvature radius of the first bending portion 114 is within a reasonable range. The first bending portion 114 can prevent an arc from forming due to the first transfer portion 111 and the connection portion 112 being too close, and the overall thickness of the transfer assembly 100 is also within a reasonable range. When the value of the curvature radius r1 of the first bending portion 114 is less than 1 mm, the curvature radius of the first bending portion 114 is too small, which easily causes the first transfer portion 111 and the connection portion 112 to be too close to form an arc; when the value of the curvature radius r1 of the first bending portion 114 is greater than 2 mm, the curvature radius of the first bending portion 114 is too large, which easily causes the overall thickness of the transfer assembly 100 to be too large, and the transfer assembly 100 occupies more space, which is not conducive to the flat design of the transfer assembly 100.

[0075] In some embodiments, the second bending portion 115 is arc-shaped, and the curvature radius r2 of the second bending portion 115 satisfies the range: 1mm≤r2≤2mm. Specifically, the curvature radius r2 of the second bending portion 115 is 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc.

[0076] In the embodiment of the present application, when the radius of curvature r2 of the second bending portion 115 satisfies the range of 1mm≤r2≤2mm, the radius of curvature of the second bending portion 115 is within a reasonable range, the second bending portion 115 can prevent the connection portion 112 from being too close to the second bending portion 115 to form an arc, and the overall thickness of the adapter assembly 100 is also within a reasonable range. When the value of the radius of curvature r2 of the second bending portion 115 is less than 1mm, the radius of curvature of the second bending portion 115 is too small, which easily causes the connection portion 112 and the second adapter portion 113 to be too close to form an arc; when the value of the radius of curvature r2 of the second bending portion 115 is greater than 2mm, the radius of curvature of the second bending portion 115 is too large, which easily causes the overall thickness of the adapter assembly 100 to be too large, and the adapter assembly 100 occupies more space, which is not conducive to the miniaturization design of the adapter assembly 100.

[0077] In some embodiments, the connecting portion 112 includes a main body 1122 and a plurality of convex ribs 1123, wherein the plurality of convex ribs 1123 are convexly disposed on the main body 1122, and the convex ribs 1123 are connected to the main body 1122 and extend along the second direction (eg Figure 3 (as shown in FIG. 1 ), the opposite ends of the main body 1122 are respectively connected to the first bending portion 114 and the second bending portion 115, and the length direction of the plurality of ribs 1123 is parallel to the second direction; wherein the second direction is the length direction of the connecting portion 112, and the second direction intersects with the first direction.

[0078] Optionally, in some embodiments, the rib 1123 is connected to the body portion 1122 and is disposed on a surface of the body portion 1122 facing the first adapter portion 111. In other embodiments, the rib 1123 is connected to the body portion 1122 and is disposed on a surface of the body portion 1122 facing the second adapter portion 113.

[0079] Optionally, in some embodiments, the first direction is perpendicular to the second direction.

[0080] In the embodiments of the present application, multiple convex ribs 1123 protrude from the body portion 1122, which is beneficial to strengthening the structural strength of the connecting portion 112, making the connecting portion 112 not easily break. When the adapter piece 110 is applied to the energy storage device 200, the adapter piece 110 is not easily broken, which is beneficial to extending the service life of the adapter assembly 100. In addition, the length directions of the multiple convex ribs 1123 are parallel to the length direction of the connecting portion 112, which is beneficial to strengthening the structural strength of the connecting portion 112 in the length direction, effectively preventing the connecting portion 112 from being broken, and being beneficial to extending the service life of the adapter assembly 100.

[0081] In some embodiments, the thickness of the first bending portion 114 is less than the thickness of the first connecting portion 111.

[0082] It can be understood that the thickness of the first bending portion 114 refers to the thickness of the middle part of the first bending portion 114 along the direction parallel to the first direction.

[0083] In the embodiments of the present application, the first bending portion 114 is thinned by upsetting a semi-circular head. When the adapter piece 110 is disposed on the energy storage device 200, along the direction parallel to the first direction, the thickness of the first bending portion 114 changes in a trend of first increasing, then decreasing, and then increasing again, that is, the thickness of the middle part of the first bending portion 114 is the smallest, and the thickness of the first bending portion 114 is less than the thickness of the first connecting portion 111, so that the yield strength of the first bending portion 114 is lower than the yield strength of the first connecting portion 111. Then, when assembling the adapter assembly 100, the adapter piece 110 is easily bent at the first bending portion 114. During the process of bending the adapter piece 110 multiple times, the bending is performed at a fixed position, which is beneficial to improving the bending process of the adapter piece 110.

[0084] In some embodiments, the ratio a of the thickness of the first bending portion 114 to the thickness of the first connecting portion 111 satisfies the range: 0.45 ≤ a ≤ 0.9. Specifically, the value of a can be, but is not limited to, 0.45, 0.48, 0.50, 0.52, 0.55, 0.60, 0.62, 0.65, 0.7, 0.75, 0.8, 0.82, 0.85, 0.9, etc.

[0085] In an embodiment of the present application, when the ratio a of the thickness of the first bending portion 114 to the thickness of the first adapter portion 111 satisfies the range of 0.45 ≤ a ≤ 0.9, the thickness of the first bending portion 114 is less than the thickness of the first adapter portion 111, so that the yield strength of the first bending portion 114 is lower than the yield strength of the first adapter portion 111, which is beneficial to bending the adapter sheet 110 at the first bending portion 114. When the ratio a of the thickness of the first bending portion 114 to the thickness of the first adapter portion 111 is less than 0.45, the thickness of the first bending portion 114 is too small or the thickness of the first adapter portion 111 is too large. When the thickness of the first bending portion 114 is too small, the stress limit of the first bending portion 114 is low and it is easy to break. When the thickness of the first adapter portion 111 is too large, it will increase the weight and thickness of the adapter assembly 100, which is not conducive to the lightweight and flat design of the adapter assembly 100. When the ratio a of the thickness of the first bending portion 114 to the thickness of the first adapter portion 111 is greater than 0.9, the thicknesses of the first bending portion 114 and the first adapter portion 111 are not much different, and it is difficult for the adapter sheet 110 to bend at the first bending portion 114, reducing the bending process of the adapter sheet 110.

[0086] Optionally, in some embodiments, the thickness of the first bending portion 114 is less than the thickness of the connecting portion 112.

[0087] In an embodiment of the present application, the thickness of the first bending portion 114 is less than the thickness of the connecting portion 112, so that the yield strength of the first bending portion 114 is lower than the yield strength of the connecting portion 112. Then, when assembling the adapter assembly 100, the adapter sheet 110 is easily bent at the first bending portion 114. During multiple bending processes of the adapter sheet 110, bending is performed at a fixed position, which is beneficial to improving the bending process of the adapter sheet 110.

[0088] In some embodiments, the thickness of the second bending portion 115 is less than the thickness of the second adapter portion 113.

[0089] It can be understood that the thickness of the second bending portion 115 refers to the thickness of the middle part of the second bending portion 115 in a direction parallel to the first direction.

[0090] In the embodiment of the present application, the second bending portion 115 is thinned by a semicircular pier head. When the adapter sheet 110 is arranged on the energy storage device 200, the thickness of the second bending portion 115 changes from large to small and then to large in the direction parallel to the first direction, that is, the thickness of the middle part of the second bending portion 115 is the smallest, and the thickness of the second bending portion 115 is less than the thickness of the second adapter portion 113, so that the yield strength of the second bending portion 115 is lower than the yield strength of the second adapter portion 113. When the adapter assembly 100 is assembled, the adapter sheet 110 is easy to bend at the second bending portion 115. The adapter sheet 110 is bent at a fixed position during multiple bending processes, which is conducive to improving the bending process of the adapter sheet 110.

[0091] In some embodiments, a ratio b of the thickness of the second bending portion 115 to the thickness of the second transition portion 113 satisfies the range of 0.45≤b≤0.9.

[0092] Specifically, the value of b can be, but is not limited to, 0.45, 0.48, 0.50, 0.52, 0.55, 0.60, 0.62, 0.65, 0.7, 0.75, 0.8, 0.82, 0.85 and 0.9, etc.

[0093] In the embodiment of the present application, when the ratio b of the thickness of the second bending portion 115 to the thickness of the second adapter portion 113 satisfies the range of 0.45≤b≤0.9, the thickness of the second bending portion 115 is less than the thickness of the second adapter portion 113, so that the yield strength of the second bending portion 115 is lower than the yield strength of the second adapter portion 113, which is conducive to the bending of the adapter sheet 110 at the second bending portion 115. When the ratio b of the thickness of the second bending portion 115 to the thickness of the second adapter portion 113 is less than 0.45, the thickness of the second bending portion 115 is too small or the thickness of the second adapter portion 113 is too large. When the thickness of the second bending portion 115 is too small, the stress limit of the second bending portion 115 is low and it is easy to break; when the thickness of the second adapter portion 113 is too large, the weight and thickness of the adapter assembly 100 will be increased, which is not conducive to the lightweight and flat design of the adapter assembly 100. When the ratio b of the thickness of the second bending portion 115 to the thickness of the second adapter portion 113 is greater than 0.9, the thickness of the second bending portion 115 and the thickness of the second adapter portion 113 are not much different, and the adapter sheet 110 is difficult to bend at the second bending portion 115, thereby reducing the bending process of the adapter sheet 110.

[0094] Optionally, in some embodiments, the thickness of the second bending portion 115 is smaller than the thickness of the connecting portion 112 .

[0095] In an embodiment of the present application, the thickness of the second bending portion 115 is less than the thickness of the connecting portion 112, so that the yield strength of the second bending portion 115 is lower than that of the connecting portion 112. Then, when assembling the adapter assembly 100, the adapter piece 110 is easily bent at the second bending portion 115. During multiple bending processes of the adapter piece 110, it is bent at a fixed position, which is beneficial to improving the bending process of the adapter piece 110.

[0096] Please refer to Figures 3 to 5 , in some embodiments, at least one end of the opposite ends of the first bending portion 114 is provided with a notch 1142 in a direction perpendicular to the second direction.

[0097] Optionally, in some embodiments, notches 1142 are provided at both opposite ends of the first bending portion 114. In other embodiments, a notch 1142 is provided at one of the opposite ends of the first bending portion.

[0098] In this embodiment, at least one end of the opposite ends of the first bending portion 114 is provided with the notch 1142. Then, when assembling the adapter assembly 100, the yield strength of the first bending portion 114 provided with the notch 1142 is lower than the yield strength of the adjacent first adapter portion 111 and the connecting portion 112, so that the adapter piece 110 is easily bent at the first bending portion 114. During multiple bending processes of the adapter piece 110, it is bent at a fixed position, which is beneficial to improving the bending process of the adapter piece 110.

[0099] In other words, the first adapter portion 111 has a first side surface 1111, and the first bending portion 114 has a second side surface 1141 connecting the first side surface 1111; the connecting portion 112 has a third side surface 1124 connecting one end of the second side surface 1141 facing away from the first side surface 1111; the second side surface 1141 is recessed from the first side surface 1111 and recessed from the third side surface 1124.

[0100] In the embodiment of the present application, the first adapter portion 111 has a first side surface 1111, the first bending portion 114 has a second side surface 1141, the connecting portion 112 has a third side surface 1124, the first side surface 1111, the second side surface 1141 and the third side surface 1124 are sequentially connected, and the second side surface 1141 is recessed in the first side surface 1111 and the third side surface 1124. It can be understood that the second side surface 1141 is provided with a notch 1142. When assembling the adapter assembly 100, since the second side surface 1141 is recessed in the first side surface 1111 and the third side surface 1124, the yield strength of the second side surface 1141 is lower than the yield strength of the first side surface 1111, and the yield strength of the second side surface 1141 is lower than the yield strength of the third side surface 1124, and the adapter sheet 110 is easily bent at the second side surface 1141 to form the first bending portion 114. The adapter sheet 110 is bent at a fixed position during multiple bending processes, which is beneficial to improving the bending process of the adapter sheet 110 .

[0101] See also Figures 3 to 5 In some embodiments, along a direction perpendicular to the second direction, at least one of the two opposite ends of the second bending portion is provided with a notch 1142.

[0102] Optionally, in some embodiments, the notch 1142 is disposed at both opposite ends of the second bending portion 115. In other embodiments, the notch 1142 is disposed at one of the opposite ends of the first bending portion.

[0103] In this embodiment, at least one of the two opposite ends of the second bending portion 115 is provided with the notch 1142. When assembling the adapter assembly 100, the yield strength of the second bending portion 115 provided with the notch 1142 is lower than the yield strength of the adjacent second adapter portion 113 and the yield strength of the connecting portion 112, so that the adapter sheet 110 can be easily bent at the second bending portion 115. The adapter sheet 110 is bent at a fixed position during multiple bending processes, which is beneficial to improving the bending process of the adapter sheet 110.

[0104] In other words, the second bending portion 115 has a fourth side surface 1151 connected to one end of the third side surface 1124 away from the second side surface 1141, and the second adapter portion 113 has a fifth side surface 1131 connected to one end of the fourth side surface 1151 away from the third side surface 1124, and the fourth side surface 1151 is recessed in the third side surface 1124 and in the fifth side surface 1131.

[0105] In the embodiment of the present application, the connecting portion 112 has a third side surface 1124, the second bending portion 115 has a fourth side surface 1151, and the second adapter portion 113 has a fifth side surface 1131. The third side surface 1124, the fourth side surface 1151, and the fifth side surface 1131 are sequentially connected, and the fourth side surface 1151 is recessed in the third side surface 1124 and the fifth side surface 1131. It can be understood that the fourth side surface 1151 is provided with a notch 1142. When assembling the adapter assembly 100, since the fourth side surface 1151 is recessed in the third side surface 1124 and the fifth side surface 1131, and the fourth side surface 1151 is provided with a notch 1142, the yield strength of the fourth side surface 1151 is lower than the yield strength of the third side surface 1124, and the yield strength of the fourth side surface 1151 is lower than the yield strength of the fifth side surface 1131, and the adapter sheet 110 is easily bent at the fourth side surface 1151 to form the second bending portion 115. The adapter sheet 110 is bent at a fixed position during multiple bending processes, which is beneficial to improving the bending process of the adapter sheet 110 .

[0106] Optionally, in some embodiments, the first adapter portion 111 has a first side surface 1111, the first bending portion 114 has a second side surface 1141, the connecting portion 112 has a third side surface 1124, the first side surface 1111, the second side surface 1141 and the third side surface 1124 are sequentially connected, an indentation is set at the connection between the first side surface 1111 and the second side surface 1141, and an indentation is set at the connection between the second side surface 1141 and the third side surface 1124.

[0107] In the embodiment of the present application, an indentation is provided at the connection between the first side surface 1111 and the second side surface 1141, and an indentation is provided at the connection between the second side surface 1141 and the third side surface 1124, that is, indentations are provided at opposite ends of the second side surface 1141, respectively, so that the yield strength of the connection is low, which is conducive to bending the adapter sheet 110 to form the first bending portion 114. The adapter sheet 110 is bent at a fixed position during multiple bending processes, which is conducive to improving the bending process of the adapter sheet 110.

[0108] Optionally, in some embodiments, the connecting portion 112 has a third side 1124, the second bending portion 115 has a fourth side 1151, the second adapter portion 113 has a fifth side 1131, the third side 1124, the fourth side 1151 and the fifth side 1131 are connected in sequence, an indentation is set at the connection between the third side 1124 and the fourth side 1151, and an indentation is set at the connection between the fourth side 1151 and the fifth side 1131.

[0109] In an embodiment of the present application, indentations are provided at the joints of the third side surface 1124 and the fourth side surface 1151, and indentations are provided at the joints of the fifth side surface 1131 and the sixth side surface, that is, indentations are provided at opposite ends of the fourth side surface 1151 respectively. The yield strength at the joints is relatively low, which is conducive to bending the adapter piece 110 to form the second bending portion 115. During multiple bending processes of the adapter piece 110, bending is performed at a fixed position, which is conducive to improving the bending process of the adapter piece 110.

[0110] Please refer to Figures 3 to 7 , in some embodiments, the fastening member 130 includes a first fastening sub-member 131 and a second fastening sub-member 132. The first fastening sub-member 131 and the second fastening sub-member 132 are inserted into the connecting portion 112 at intervals. The first fastening sub-member 131 is at least partially inserted between the first adapter portion 111 and the connecting portion 112 and is disposed close to the first bending portion 114. The first fastening sub-member 131 is used to provide a first gap between the first adapter portion 111 and the connecting portion 112.

[0111] In an embodiment of the present application, the first fastening sub-member 131 is at least partially located between the first adapter portion 111 and the connecting portion 112, which is conducive to preventing the first adapter portion 111 and the connecting portion 112 from being too close to form an arc. When the adapter assembly 100 is applied to the energy storage device 200, it can be avoided that the adapter assembly 100 explodes due to arc sparks, which is conducive to improving the safety performance of the adapter assembly 100 and the energy storage device 200. In addition, the first fastening sub-member 131 can increase the radius of curvature of the first bending portion 114, prevent the first bending portion 114 from being bent excessively, avoid the first bending portion 114 reaching the stress limit and breaking, reduce the risk of breakage of the first adapter portion 111 and the connecting portion 112, and improve the assembly yield rate of the adapter assembly 100. Furthermore, since the first fastening sub-member 131 is at least partially inserted between the first adapter portion 111 and the connecting portion 112, when the adapter assembly 100 is applied to the energy storage device 200, the current collector plate 220 and the adapter piece 110 can be welded or riveted together first, and then the first fastening sub-member 131 is inserted between the first bending portion 114 and the connecting portion 112, which improves the installation convenience of the first fastening sub-member 131. And compared with the scheme of first sleeving the first fastening sub-member 131 on the adapter piece 110 and then welding or riveting the current collector plate 220 and the adapter piece 110, the scheme provided by the embodiment of the present application can avoid melting the first fastening sub-member 131 at high temperature during welding or riveting, which is conducive to extending the service life of the first fastening sub-member 131 and the adapter piece 110.

[0112] In some embodiments, the buckle member 130 includes a first buckle sub-member 131 and a second buckle sub-member 132. The first buckle sub-member 131 and the second buckle sub-member 132 are inserted into the connecting portion 112 at intervals; at least a part of the second buckle sub-member 132 is inserted between the second adapter portion 113 and the connecting portion 112 and is disposed near the second bending portion 115. The second buckle sub-member 132 is used to provide a second gap between the second adapter portion 113 and the connecting portion 112.

[0113] In an embodiment of the present application, at least a part of the second buckle sub-member 132 is located between the second adapter portion 113 and the connecting portion 112, which is beneficial to preventing the second adapter portion 113 and the connecting portion 112 from being too close to form an arc. When the adapter assembly 100 is applied to the energy storage device 200, it can avoid the explosion of the adapter assembly 100 due to arc sparks, which is beneficial to improving the safety performance of the adapter assembly 100 and the energy storage device 200; in addition, the second buckle sub-member 132 can increase the curvature radius of the second bending portion 115, prevent the second bending portion 115 from being bent excessively, avoid the second bending portion 115 reaching the stress limit and breaking, reduce the risk of the second adapter portion 113 and the connecting portion 112 breaking, and improve the assembly yield rate of the adapter assembly 100. Furthermore, at least a part of the second buckle sub-member 132 is inserted between the second adapter portion 113 and the connecting portion 112, so that when the adapter assembly 100 is applied to the energy storage device 200, the current collecting plate 220 and the adapter piece 110 can be welded or riveted together first, and then the second buckle sub-member 132 is inserted between the second bending portion 115 and the connecting portion 112, which improves the installation convenience of the second buckle sub-member 132. And compared with the scheme of first sleeving the second buckle sub-member 132 on the adapter piece 110 and then welding or riveting the current collecting plate 220 and the adapter piece 110, the scheme provided by the embodiment of the present application can avoid the influence of the high temperature during welding or riveting on the second buckle sub-member 132, which is beneficial to extending the service life of the second buckle sub-member 132 and the adapter piece 110.

[0114] In some embodiments, both the first buckle sub-member 131 and the second buckle sub-member 132 include a first clamping portion 133, a second clamping portion 134 and a third clamping portion 135 that are bent and connected in sequence; the first clamping portion 133 and the third clamping portion 135 are respectively located on the same side of the second clamping portion 134, and along the first direction, the first clamping portion 133 and the third clamping portion 135 are stacked.

[0115] Understandably, one end of the first clamping portion 133 is connected to the second clamping portion 134, one end of the third clamping portion 135 is connected to the second clamping portion 134, and the extending direction of the other end of the first clamping portion 133 away from the second clamping portion 134 is the same as the extending direction of the other end of the third clamping portion 135 away from the second clamping portion 134.

[0116] In an embodiment of the present application, the first clamping portion 133 and the third clamping portion 135 are respectively located on the same side of the second clamping portion 134, and along the first direction, the first clamping portion 133 and the third clamping portion 135 are stacked. Then, when the first snap member 131 is inserted into the connecting portion 112, the connecting portion 112 is disposed between the first clamping portion 133 and the third clamping portion 135, so as to prevent the first adapter portion 111 and the connecting portion 112 from being too close to form an arc, and prevent the first bending portion 114 from being bent too much, avoiding the first bending portion 114 reaching the stress limit and breaking; when the second snap member 132 is inserted into the connecting portion 112, the connecting portion 112 is disposed between the first clamping portion 133 and the third clamping portion 135, so as to prevent the second adapter portion 113 and the connecting portion 112 from being too close to form an arc, and prevent the first bending portion 114 from being bent too much, avoiding the first bending portion 114 reaching the stress limit and breaking.

[0117] Optionally, in this embodiment, the first snap member 131 includes an insertion opening 142, and the first clamping portion 133, the second clamping portion 134, and the third clamping portion 135 enclose the insertion opening 142, and the insertion opening 142 is used to insert the first snap member 131 between the first adapter portion 111 and the connecting portion 112.

[0118] In this embodiment, the first snap member 131 includes the insertion opening 142, so that when the adapter assembly 100 is applied to the energy storage device 200, the current collector plate 220 and the adapter plate 110 can be first welded or riveted together, and then the first snap member 131 is inserted between the first bending portion 114 and the connecting portion 112 through the insertion opening 142, which improves the installation convenience of the first snap member 131. And compared with the scheme of first sleeving the first snap member 131 on the adapter plate 110 and then welding or riveting the current collector plate 220 and the adapter plate 110, the scheme provided by the embodiment of the present application can avoid melting the first snap member 131 at high temperature during welding or riveting, which is beneficial to extending the service life of the first snap member 131 and the adapter plate 110.

[0119] Optionally, in this embodiment, the second snap-fit component 132 includes an insertion opening 142 , and the first snap-fit portion 133 , the second snap-fit portion 134 and the third snap-fit portion 135 enclose the insertion opening 142 , and the insertion opening 142 is used to insert the second snap-fit component 132 between the second adapter portion 113 and the connecting portion 112 .

[0120] In the present embodiment, the second snap-on component 132 includes the insertion opening 142, so that when the adapter assembly 100 is applied to the energy storage device 200, the current collecting plate 220 and the adapter plate 110 can be welded or riveted together first, and then the second snap-on component 132 can be inserted between the second bending portion 115 and the connecting portion 112 through the insertion opening 142, thereby improving the installation convenience of the second snap-on component 132. Compared with the solution of first sleeveing the second snap-on component 132 on the adapter plate 110 and then welding or riveting the current collecting plate 220 and the adapter plate 110, the solution provided in the embodiment of the present application can avoid the influence of high temperature during welding or riveting on the second snap-on component 132, which is beneficial to prolonging the service life of the second snap-on component 132 and the adapter plate 110.

[0121] In the embodiment of the present application, along the direction parallel to the stacking direction of the first clamping portion 133 and the third clamping portion 135, the distance h1 from the surface of the first clamping portion 133 away from the third clamping portion 135 to the surface of the third clamping portion 135 away from the first clamping portion 133 satisfies the range of 2mm≤h1≤3.5mm. Specifically, the value of h1 can be, but is not limited to, 2mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, etc.

[0122] In an embodiment of the present application, when the distance h1 from the surface of the first engaging portion 133 facing away from the third engaging portion 135 to the surface of the third engaging portion 135 facing away from the first engaging portion 133 satisfies the range of 2 mm ≤ h1 ≤ 3.5 mm, the distance from the surface of the first engaging portion 133 facing away from the third engaging portion 135 to the surface of the third engaging portion 135 facing away from the first engaging portion 133 is within a reasonable range. The first snap member 131 and the second snap member 132 can not only prevent the distance between the connecting portion 112 and the first adapter portion 111 and the second adapter portion 113 from being too close, but also avoid excessive bending of the first bending portion 114 and the second bending portion 115, improving the safety performance of the adapter assembly 100. When the distance h1 from the surface of the first engaging portion 133 facing away from the third engaging portion 135 to the surface of the third engaging portion 135 facing away from the first engaging portion 133 is less than 2 mm, it is likely that the distance between the connecting portion 112 and the first adapter portion 111 and the second adapter portion 113 is too close to form an electric arc, increasing the risk of explosion of the adapter assembly 100 due to electric arc sparks. When the distance h1 from the surface of the first engaging portion 133 facing away from the third engaging portion 135 to the surface of the third engaging portion 135 facing away from the first engaging portion 133 is greater than 3.5 mm, when the first snap member 131 and the second snap member 132 are inserted into the connecting portion 112, it is likely that the overall thickness of the adapter assembly 100 is too large, and the adapter assembly 100 occupies more space, which is not conducive to the flat design of the adapter assembly 100.

[0123] In some embodiments, the first engaging portion 133 includes a first engaging body 1331 and a first protruding portion 1332, and the first protruding portion 1332 is disposed on the surface of the first engaging body 1331 facing away from the third engaging portion 135; the third engaging portion 135 includes a second engaging body 1351 and a second protruding portion 1352, and the second protruding portion 1352 is disposed on the surface of the second engaging body 1351 facing away from the first engaging portion 133, and the first protruding portion 1332 and the second protruding portion 1352 are disposed at the same end of the first snap member 131; the first protruding portion 1332 and the second protruding portion 1352 of the first snap member 131 both face away from the second snap member 132.

[0124] It can be understood that the first protruding portion 1332 and the second protruding portion 1352 of the first snap member 131 both face away from the second snap member 132, which can be that the first protruding portion 1332 and the second protruding portion 1352 of the first snap member 131 are both disposed close to the first bending portion 114.

[0125] In the embodiment of the present application, the first protrusion 1332 of the first buckle member 131 is arranged on the surface of the first clamping body 1331 away from the third clamping portion 135 and close to the first bent portion 114. The first protrusion 1332 of the first buckle member 131 is conducive to increasing the curvature radius of the first bent portion 114, preventing the first bent portion 114 from being excessively bent, and preventing the first bent portion 114 from reaching the stress limit and breaking; the second protrusion 1352 of the first buckle member 131 is arranged on the surface of the second clamping body 1351 away from the first clamping portion 133 and close to the first bent portion 1 14 is set, when the adapter assembly 100 is applied to the energy storage device 200, the opposite ends of the adapter assembly 100 are respectively connected to the collecting plate 220 and the end cover assembly 230, the first adapter portion 111 is arranged closer to the end cover assembly 230 than the second adapter portion 113, and the orthographic projection of the second adapter portion 113 on the first surface 1121 falls within the range of the first surface 1121, then the second protrusion 1352 of the first snap member 131 is at least partially exposed on the surface of the connecting portion 112 away from the end cover assembly 230, and the second protrusion 1352 of the first snap member 131 is used to support and resist the collecting plate 220.

[0126] In some embodiments, the first clamping portion 133 includes a first clamping body 1331 and a first protrusion 1332, and the first protrusion 1332 is arranged on the surface of the first clamping body 1331 away from the third clamping portion 135; the third clamping portion 135 includes a second clamping body 1351 and a second protrusion 1352, and the second protrusion 1352 is arranged on the surface of the second clamping body 1351 away from the first clamping portion 133, and the first protrusion 1332 and the second protrusion 1352 are arranged at the same end of the first buckle component 131; the first protrusion 1332 and the second protrusion 1352 of the second buckle component 132 are both arranged away from the first buckle component 131.

[0127] It can be understood that the first protrusion 1332 and the second protrusion 1352 of the second buckle component 132 are both arranged away from the first buckle component 131 , and the first protrusion 1332 and the second protrusion 1352 of the second buckle component 132 are both arranged close to the second bending portion 115 .

[0128] In an embodiment of the present application, the first protrusion 1332 of the second snap-fit component 132 is arranged on the surface of the first snap-fit body 1331 away from the third snap-fit component 135 and close to the second bending portion 115. When the adapter assembly 100 is applied to the energy storage device 200, the opposite ends of the adapter assembly 100 are respectively connected to the collecting plate 220 and the end cover assembly 230. The second adapter portion 113 is arranged farther away from the end cover assembly 230 than the first adapter portion 111, and the orthographic projection of the first adapter portion 111 on the first surface 1121 falls within the range of the first surface 1121. Then, the first protrusion of the second snap-fit component 132 is at least partially exposed on the surface of the connecting portion 112 facing the end cover assembly 230, and the second protrusion 1352 of the second snap-fit component 132 is used to resist and support the adapter plate 110. The second protrusion 1352 of the second clip component 132 is arranged on the surface of the second clip body 1351 away from the first clip portion 133 and close to the second bending portion 115. The second protrusion 1352 of the second clip component 132 is beneficial to increase the curvature radius of the second bending portion 115, preventing the second bending portion 115 from excessive bending, and avoiding the second bending portion 115 from reaching the stress limit and breaking.

[0129] In the embodiment of the present application, along the direction parallel to the stacking direction of the first clamping portion 133 and the third clamping portion 135, the distance h2 from the surface of the first protrusion 1332 away from the second protrusion 1352 to the surface of the second protrusion 1352 away from the first protrusion 1332 satisfies the range of 2mm≤h2≤3.5mm. Specifically, the value of h2 can be, but is not limited to, 2mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, etc.

[0130] In the embodiments of the present application, when the distance h2 from the surface of the first protruding portion 1332 facing away from the second protruding portion 1352 to the surface of the second protruding portion 1352 facing away from the first protruding portion 1332 satisfies the range of 2 mm ≤ h2 ≤ 3.5 mm, the distance from the surface of the first protruding portion 1332 facing away from the second protruding portion 1352 to the surface of the second protruding portion 1352 facing away from the first protruding portion 1332 is within a reasonable range. The first snap member 131 and the second snap member 132 can not only prevent the distance between the connecting portion 112 and the first adapter portion 111 and the second adapter portion 113 from being too close, but also avoid excessive bending of the first bending portion 114 and the second bending portion 115, improving the safety performance of the adapter assembly 100. When the distance h2 from the surface of the first protruding portion 1332 facing away from the second protruding portion 1352 to the surface of the second protruding portion 1352 facing away from the first protruding portion 1332 is less than 2 mm, it is easy for the distance between the connecting portion 112 and the first adapter portion 111 and the second adapter portion 113 to be too close to form an arc, increasing the risk of explosion of the adapter assembly 100 due to arc sparks; when the distance h2 from the surface of the first protruding portion 1332 facing away from the second protruding portion 1352 to the surface of the second protruding portion 1352 facing away from the first protruding portion 1332 is greater than 3.5 mm, when the first snap member 131 and the second snap member 132 are inserted into the connecting portion 112, it is easy for the overall thickness of the adapter assembly 100 to be too large, and the adapter assembly 100 occupies more space, which is not conducive to the miniaturized design of the adapter assembly 100. In addition, compared with Figure 6 the design solutions of the first snap member 131 and the second snap member 132 provided in the embodiments of the present application, the first snap member 131 and the second snap member 132 provided in the present application have a lighter weight, which is beneficial to realizing the lightweight design of the snap member 130.

[0131] Please refer to Figures 3 to 5 and Figure 7 and Figure 8 In some embodiments, the first clamping portion 133 further includes a third protruding portion 1333, the third protruding portion 1333 is disposed on the surface of the first clamping body 1331 facing away from the third clamping portion 135, and is disposed at one end of the first clamping body 1331 away from the first protruding portion 1332; the third clamping portion 135 further includes a fourth protruding portion 1353, the fourth protruding portion 1353 is disposed on the surface of the second clamping body 1351 facing away from the second clamping portion 134, and is disposed at one end of the second clamping body 1351 away from the second protruding portion 1352.

[0132] In an embodiment of the present application, the surface of the first clamping body 1331 facing away from the third clamping portion 135 includes a first protrusion 1332 and a third protrusion 1333 that are spaced apart, and the surface of the third clamping body facing away from the second clamping portion 134 includes a second protrusion 1352 and a fourth protrusion 1353 that are spaced apart, so that when the first clamping component 131 and the second clamping component 132 are inserted into the connecting portion 112 at intervals, the first clamping component 131 and the second clamping component 132 can be set close to the first bending portion 114 and the second bending portion 115 from any direction, thereby reducing the assembly accuracy of the adapter component 100 and helping to improve the assembly efficiency of the adapter component 100.

[0133] See also Figure 9 and Figure 10 In some embodiments, the snap fastener 130 includes a first portion 136, a second portion 137 and a third portion 138 that are connected to each other. The first portion 136 and the third portion 138 are respectively located on the same side of the second portion 137. Along the first direction, the first portion 136 and the third portion 138 are stacked. The first portion 136 includes a first main body portion 1361 and a fifth protrusion 1362. The number of the fifth protrusions 1362 is two. The two fifth protrusions 1362 are both arranged on the surface of the first main body portion 1361 away from the third portion 138, and are respectively arranged at opposite ends of the first main body portion 1361; the third portion 138 includes a second main body portion 1381 and a sixth protrusion 1382. The number of the sixth protrusion 1382 is two. The two sixth protrusions 1382 are both arranged on the surface of the second main body portion 1381 away from the first portion 136, and are respectively arranged at opposite ends of the second main body portion 1381.

[0134] It can be understood that one end of the first part 136 is connected to the second part 137, one end of the third part 138 is connected to the second part 137, and the extension direction of the other end of the first part 136 away from the second part 137 is the same as the extension direction of the other end of the third part 138 away from the second part 137.

[0135] In this embodiment, the first portion 136, the second portion 137 and the third portion 138 enclose a receiving cavity 1383. When the first buckle member 131 and the second buckle member 132 are inserted into the connecting portion 112, the connecting portion 112 is disposed in the receiving cavity 1383. When the adapter assembly 100 is melted due to overheating during operation, the melted metal slag can fall on the first portion 136 or the third portion 138, effectively preventing the melted metal slag from falling on the adapter sheet 110 to cause a short circuit and then causing an explosion, thereby improving the safety performance of the adapter assembly 100. In addition, compared to the solution in which the fastener 130 includes a first fastener component 131 and a second fastener component 132, the fastener 130 provided in the embodiment of the present application is an integrated structure. When assembling the adapter assembly 100, it is only necessary to insert the fastener 130 into the adapter plate 110 so that the connecting portion 112 is accommodated in the accommodating cavity 1383, which simplifies the assembly process of the adapter assembly 100 and is beneficial to improving the assembly efficiency of the adapter assembly 100. Furthermore, the two fifth protrusions 1362 are both arranged on the surface of the first main body portion 1361 away from the third portion 138, and are respectively arranged at the opposite ends of the first main body portion 1361. The two fifth protrusions 1362 are respectively arranged close to the first bending portion 114 and the second bending portion 115. The fifth protrusions 1362 are beneficial to strengthening the curvature radius of the first bending portion 114 and the curvature radius of the second bending portion 115, preventing the first bending portion 114 and the second bending portion 115 from excessive bending, avoiding the first bending portion 114 and the second bending portion 115 from reaching the stress limit and breaking, which is beneficial to extending the service life of the adapter plate 110. Finally, the two sixth protrusions 1382 are both arranged on the surface of the second main body portion 1381 away from the first portion 136, and are respectively arranged at opposite ends of the second main body portion 1381. The two sixth protrusions 1382 are respectively arranged close to the first bending portion 114 and the second bending portion 115. The sixth protrusions 1382 are beneficial to strengthening the curvature radius of the first bending portion 114 and the curvature radius of the second bending portion 115, preventing the first bending portion 114 and the second bending portion 115 from excessive bending, avoiding the first bending portion 114 and the second bending portion 115 from reaching the stress limit and breaking, which is beneficial to extending the service life of the adapter plate 110.

[0136] It can be understood that the buckle 130 is an integral structure. In some embodiments, the first portion 136, the second portion 137 and the third portion 138 are integrally formed, which simplifies the preparation process of the buckle 130. In other embodiments, the first portion 136, the second portion 137 and the third portion 138 are first formed separately and then connected together, which is conducive to saving the raw materials for the production of the buckle 130.

[0137] See also Figure 11 and Figure 12 In some embodiments, the snap fastener 130 includes a first column portion 139, a straight rod portion 140 and a second column portion 141 which are bent and connected in sequence, the first column portion 139 and the second column portion 141 are respectively located on the same side of the straight rod portion 140, the first column portion 139 is located between the first adapter portion 111 and the connecting portion 112, and abuts against the first bent portion 114; the straight rod portion 140 is located on one side of the adapter plate 110; the second column portion 141 is located between the second adapter portion 113 and the connecting portion 112, and abuts against the second bent portion 115.

[0138] It can be understood that the first column portion 139 and the second column portion 141 are respectively located on the same side of the straight rod portion 140, and one end of the first column portion 139 is connected to the straight rod portion 140, and one end of the second column portion 141 is connected to the straight rod portion 140, and the extension direction of the other end of the first column portion 139 away from the straight rod portion 140 is the same as the extension direction of the other end of the second column portion 141 away from the straight rod portion 140.

[0139] In the embodiment of the present application, when the snap member 130 is clamped on the connecting portion 112, the first column portion 139 is inserted between the first adapter portion 111 and the connecting portion 112 to prevent the first bending portion 114 from being excessively bent, thereby reducing the risk of the first bending portion 114 being broken; the second main body portion is inserted between the second adapter portion 113 and the connecting portion 112 to prevent the second bending portion 115 from being excessively bent, thereby reducing the risk of the second bending portion 115 being broken. In the embodiment of the present application, the snap member 130 has a simple structure, which is conducive to simplifying the processing technology of the snap member 130 and improving the production efficiency of the snap member 130. In addition, based on the use of the same material, the snap member 130 is light in weight, which is conducive to realizing the lightweight design of the snap member 130 and the adapter assembly 100.

[0140] Optionally, in some embodiments, the first column portion 139, the straight rod portion 140, and the second column portion 141 are an integrally formed structure. When the first column portion 139, the straight rod portion 140, and the second column portion 141 are an integrally formed structure, it is beneficial to simplify the production process of the buckle 130, and it is beneficial to simplify the assembly process of the adapter assembly 100, and improve the assembly efficiency of the adapter assembly 100. In other embodiments, the first column portion 139, the straight rod portion 140, and the second column portion 141 are first formed separately and then connected into an integral structure, which is beneficial to save the production materials of the buckle 130, and then reduce the production costs of the buckle 130 and the adapter assembly 100.

[0141] In some embodiments, the diameter d1 of the first column portion 139 satisfies the range of 2 mm ≤ d1 ≤ 3.5 mm. Specifically, the diameter d1 of the first column portion 139 may be, but is not limited to, 2 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, etc.

[0142] In an embodiment of the present application, when the diameter d1 of the first column portion 139 satisfies the range of 2mm≤d1≤3.5mm, the diameter of the first column portion 139 is within a reasonable range, so that the first column portion 139 can prevent the first bending portion 114 from excessive bending and reduce the risk of breakage of the first bending portion 114, and can also prevent the first adapter portion 111 from being too close to the connecting portion 112 to form an arc, and the adapter assembly 100 has a higher safety performance. When the value of the diameter d1 of the first column portion 139 is less than 2 mm, the diameter of the first column portion 139 is too small, which may cause the first adapter portion 111 and the connecting portion 112 to be too close to form an arc, thereby increasing the risk of the adapter assembly 100 exploding due to arc sparks and reducing the safety performance of the adapter assembly 100; when the value of the diameter d1 of the first column portion 139 is greater than 3.5 mm, the diameter of the first column portion 139 is too large. When the first column portion 139 is inserted between the first adapter portion 111 and the connecting portion 112, the overall thickness of the adapter assembly 100 may be too large, and the adapter assembly 100 may occupy more space, which is not conducive to the miniaturization design of the adapter assembly 100.

[0143] In some embodiments, the diameter d2 of the second column portion 141 satisfies the range of 2 mm ≤ d2 ≤ 3.5 mm. Specifically, the diameter d2 of the second column portion 141 may be, but is not limited to, 2 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, etc.

[0144] In an embodiment of the present application, when the diameter d2 of the second column portion 141 satisfies the range of 2mm≤d2≤3.5mm, the diameter of the second column portion 141 is within a reasonable range, so that the second column portion 141 can prevent the second bending portion 115 from excessively bending and reduce the risk of breakage of the second bending portion 115, and can also prevent the distance between the connecting portion 112 and the second adapter portion 113 from being too close to form an arc, and the adapter assembly 100 has a higher safety performance. When the value of the diameter d2 of the second column portion 141 is less than 2 mm, the diameter of the second column portion 141 is too small, which may cause the distance between the connecting portion 112 and the second adapter portion 113 to be too close to form an arc, thereby increasing the risk of explosion of the adapter assembly 100 due to arc sparks and reducing the safety performance of the adapter assembly 100; when the value of the diameter d2 of the second column portion 141 is greater than 3.5 mm, the diameter of the second column portion 141 is too large. When the second column portion 141 is inserted between the connecting portion 112 and the second adapter portion 113, the overall thickness of the adapter assembly 100 may be too large, and the adapter assembly 100 may occupy more space, which is not conducive to the miniaturization design of the adapter assembly 100.

[0145] See also Figure 13 and Figure 14 The embodiment of the present application further provides an energy storage device 200, which includes: an electrode assembly 210, a current collecting disk 220, an adapter assembly 100 provided in the present application, and an end cap assembly 230, wherein the current collecting disk 220 is located on one side of the electrode assembly 210 and is electrically connected to the electrode assembly 210; the adapter assembly 100 is located on a side of the current collecting disk 220 away from the electrode assembly 210, and the first adapter portion 111 of the adapter assembly 100 is electrically connected to the current collecting disk 220; the end cap assembly 230 is arranged on a side of the adapter assembly 100 away from the electrode assembly 210, and is electrically connected to the second adapter portion 113 of the adapter assembly 100; wherein, along the first direction, the end of the second bending portion 115 away from the second adapter portion 113 is closer to the end cap assembly 230 than the end of the first bending portion 114 away from the first adapter portion 111.

[0146] It can be understood that in the energy storage device 200 provided in the embodiment of the present application, the electrode assembly 210, the current collecting disk 220, the adapter assembly 100 and the end cover assembly 230 are arranged in sequence, and the adapter assembly 100 includes a first adapter portion 111, a connecting portion 112 and a second adapter portion 113 that are bent and connected in sequence, and the first adapter portion 111 is arranged closer to the end cover assembly 230 than the second adapter portion 113, then the opposite ends of the current collecting disk 220 are electrically connected to the electrode assembly 210 and the second adapter portion 113, respectively, and the opposite ends of the first adapter portion 111 are electrically connected to the connecting portion 112 and the end cover assembly 230, respectively.

[0147] It can be understood that, along the first direction, the end of the second bent portion 115 away from the second adapter portion 113 is arranged closer to the end cover assembly 230 than the end of the first bent portion 114 away from the first adapter portion 111. When the adapter assembly 100 is applied to the energy storage device 200, the end surface of the second bent portion 115 away from the second adapter portion 113 is bent toward the direction close to the end cover assembly 230, so that the adapter sheet 110 presents a horizontal "S" shape.

[0148] In an embodiment of the present application, the energy storage device 200 includes the adapter assembly 100 provided in the present application, and the opposite ends of the adapter assembly 100 are respectively connected to the current collecting plate 220 and the end cover assembly 230, so as to realize the transmission of the power of the electrode assembly 210 to the end cover assembly 230, thereby realizing the charging and discharging process of the energy storage device 200. When assembling the energy storage device 200, the adapter assembly 100 can avoid squeezing the end cover assembly 230 of the energy storage device 200, so that the energy storage device 200 has a higher safety performance. In addition, the adapter assembly 100 includes a snap-fit part 130 to avoid excessive bending of the first bending portion 114 and the second bending portion 115, and prevent the first bending portion 114 and the second bending portion 115 from reaching the stress limit and breaking, which is beneficial to prolonging the service life of the adapter sheet 110 and the energy storage device 200. In addition, along the first direction, the end of the second bent portion 115 away from the second adapter portion 113 is closer to the end cover assembly 230 than the end of the first bent portion 114 away from the first adapter portion 111, that is, when the adapter sheet 110 is assembled on the energy storage device 200, the end surface of the second bent portion 115 away from the second adapter portion 113 is bent toward the direction close to the end cover assembly 230, so that the adapter sheet 110 presents a horizontal "S" shape. Along the first direction, The end of the connecting portion 112 connected to the first bending portion 114 is arranged farther away from the end cover assembly 230 than the end connected to the second bending portion 115, that is, the connecting portion 112 is obliquely arranged between the first adapter portion 111 and the second adapter portion 113, thereby reducing the thickness of the adapter assembly 100 in the first direction, further saving space between the collecting plate 220 and the end cover assembly 230, which is beneficial to increasing the volume of the electrode assembly 210, and then improving the energy density of the energy storage device 200.

[0149] Optionally, the energy storage device 200 may be, but is not limited to, 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.

[0150] Optionally, the electrode assembly 210 includes a positive electrode plate (not shown), a diaphragm (not shown) and a negative electrode plate (not shown) arranged in sequence, and the positive electrode plate and the negative electrode plate are electrically connected to the end cover assembly 230 through the current collecting plate 220 and the adapter assembly 100.

[0151] Optionally, the current collecting plate 220 includes a positive current collecting plate and a negative current collecting plate, the opposite ends of the positive current collecting plate are electrically connected to the positive electrode plate and the adapter assembly 100 respectively, and the opposite ends of the negative current collecting plate are electrically connected to the negative electrode plate and the adapter assembly 100 respectively.

[0152] Optionally, in some embodiments, the two opposite ends of the adapter assembly 100 are respectively electrically connected to the positive electrode current collecting disc 220 and the end cap assembly 230. In other embodiments, the two opposite ends of the adapter assembly 100 are respectively electrically connected to the negative electrode current collecting disc 220 and the end cap assembly 230.

[0153] It can be understood that, along the first direction, the shortest distance from the end of the second bending portion 115 away from the second adapter portion 113 to the end cover assembly 230 is less than twice the radius of curvature of the first bending portion 114 .

[0154] In this embodiment, along the first direction, the shortest distance from the end of the second bending portion 115 away from the second adapter portion 113 to the end cover assembly 230 is less than 2 times the radius of curvature of the first bending portion 114, and the end of the second bending portion 115 away from the second adapter portion 113 is bent toward the side close to the end cover assembly 230, so that the adapter plate 110 presents a horizontal "S" shape, and the end of the connecting portion 112 connected to the first bending portion 114 is arranged farther away from the end cover assembly 230 than the end connected to the second bending portion 115, thereby reducing the thickness of the adapter assembly 100 in the first direction, further saving space between the collecting plate 220 and the end cover assembly 230, which is beneficial to increasing the volume of the electrode assembly 210, and then improving the energy density of the energy storage device 200.

[0155] Optionally, in some embodiments, when the snap member 130 includes a first snap member 131 and a second snap member 132 that are spaced apart, and the adapter assembly 100 is applied to the energy storage device 200, the second bending portion 115 is bent toward a side close to the end cover assembly 230, and the end portion of the connecting portion 112 connected to the first bending portion 114 is arranged farther away from the end cover assembly 230 than the end portion connected to the second bending portion 115, the first protrusion 1332 of the second snap member 132 and the first adapter portion 111 abut against the end cover assembly 230, and the second protrusion 1352 of the first snap member 131 and the second adapter portion 113 abut against the collecting plate 220.

[0156] In an embodiment of the present application, when the adapter assembly 100 is applied to the energy storage device 200, the first protrusion 1332 of the second snap-fit component 132 and the first adapter portion 111 abut against the end cover assembly 230, and the second protrusion 1352 of the first snap-fit component 131 and the second adapter portion 113 abut against the current collecting plate 220, so that the adapter plate 110 presents a horizontal "S" shape, thereby reducing the thickness of the adapter assembly 100 in the first direction, so as to save space between the current collecting plate 220 and the end cover assembly 230, which is beneficial to increase the volume of the electrode assembly 210, and then improve the energy density of the energy storage device 200.

[0157] Optionally, in some embodiments, when the snap fastener 130 includes a first column portion 139, a straight rod portion 140 and a second column portion 141 that are bent and connected in sequence, the second bent portion 115 is bent toward a side close to the end cover assembly 230, and the end of the connecting portion 112 connected to the first bent portion 114 is arranged farther away from the end cover assembly 230 than the end connected to the second bent portion 115, and the surface of the connecting portion 112 facing away from the second adapter portion 113 abuts against the end cover assembly 230, and the surface of the connecting portion 112 facing away from the first adapter portion 111 abuts against the collecting plate 220.

[0158] In an embodiment of the present application, when the adapter assembly 100 is applied to the energy storage device 200, the first column portion 139 is inserted between the first adapter portion 111 and the connecting portion 112, the second column portion 141 is inserted between the second adapter portion 113 and the connecting portion 112, and the straight rod portion 140 is arranged on one side of the adapter plate 110, and the adapter plate 110 presents a horizontal "S" shape, thereby reducing the thickness of the adapter assembly 100 in a direction perpendicular to the arrangement direction of the collecting plate 220 and the end cover assembly 230, so as to save space between the collecting plate 220 and the end cover assembly 230, which is beneficial to increase the volume of the electrode assembly 210, and then improve the energy density of the energy storage device 200.

[0159] Optionally, in some embodiments, the radius of curvature of the first bent portion 114 is r1, and the radius of curvature of the second bent portion 115 is r2. When the adapter assembly 100 is assembled to the energy storage device 200, in the first direction, the end of the second bent portion 115 facing away from the second adapter portion 113 is closer to the end cap assembly 230 than the end of the first bent portion 114 facing away from the first adapter portion 111. In the first direction, the overall thickness D of the adapter assembly 100 satisfies the range: 1.1(r1 + r2) ≤ D ≤ 1.5(r1 + r2). Specifically, the value of the overall thickness D of the adapter plate 110 may be, but is not limited to, 1.1(r1 + r2), 1.15(r1 + r2), 1.2(r1 + r2), 1.25(r1 + r2), 1.3(r1 + r2), 1.35(r1 + r2), 1.4(r1 + r2), 1.42(r1 + r2), 1.45(r1 + r2), 1.5(r1 + r2), etc.

[0160] It can be understood that in the first direction, the overall thickness of the adapter assembly 100 refers to the distance from the end of the second bent portion 115 facing away from the first adapter portion 111 to the end of the first bent portion 114 facing away from the second adapter portion 113 in the first direction.

[0161] In the embodiments of the present application, the buckle member 130 can effectively prevent the first bent portion 114 and the second bent portion 115 from being bent excessively, prevent the first bent portion 114 and the second bent portion 115 from reaching the stress limit and breaking, which is beneficial to extending the service life of the adapter plate 110 and the energy storage device 200. In addition, in the first direction, the end of the second bent portion 115 facing away from the second adapter portion 113 is closer to the end cap assembly 230 than the end of the first bent portion 114 facing away from the first adapter portion 111, so that the adapter plate 110 presents a horizontally placed "S" shape. In the first direction, the end of the connecting portion 112 connected to the first bent portion 114 is farther away from the end cap assembly 230 than the end connected to the second bent portion 115, and the overall thickness D of the adapter plate 110 satisfies the range 1.1(r1 + r2) ≤ D ≤ 1.5(r1 + r2), which is beneficial to reducing the thickness of the adapter assembly 100 in the first direction, saving the space between the current collector plate 220 and the end cap assembly 230, increasing the volume of the electrode assembly 210, and then improving the energy density of the energy storage device 200.

[0162] Optionally, in some embodiments, along the first direction, the distance h3 between the surface of the collecting plate 220 facing the end cover assembly 230 and the surface of the end cover assembly 230 facing the collecting plate 220 satisfies the range: 3.2mm≤h3≤4.8mm. Specifically, the value of the distance h3 between the surface of the collecting plate 220 facing the end cover assembly 230 and the surface of the end cover assembly 230 facing the collecting plate 220 may be, but is not limited to, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4.0mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, etc.

[0163] In an embodiment of the present application, when the distance h3 between the surface of the collecting plate 220 facing the end cover assembly 230 and the surface of the end cover assembly 230 facing the collecting plate 220 satisfies the range of 3.2mm≤h3≤4.8mm, the distance between the surface of the collecting plate 220 facing the end cover assembly 230 and the surface of the end cover assembly 230 facing the collecting plate 220 is within a reasonable range, the adapter assembly 100 can be arranged between the collecting plate 220 and the end cover assembly 230, and the energy storage device 200 has a good assembly yield and a higher energy density. When the value of the distance h3 between the surface of the collecting disk 220 facing the end cover assembly 230 and the surface of the end cover assembly 230 facing the collecting disk 220 is less than 3.2 mm, the distance between the collecting disk 220 and the end cover assembly 230 is too small, and the adapter assembly 100 is difficult to be arranged between the collecting disk 220 and the end cover assembly 230, which easily causes mutual extrusion between the collecting disk 220, the adapter assembly 100 and the end cover assembly 230, thereby reducing the assembly yield of the energy storage device 200; when the value of the distance h3 between the surface of the collecting disk 220 facing the end cover assembly 230 and the surface of the end cover assembly 230 facing the collecting disk 220 is greater than 4.8 mm, the distance between the collecting disk 220 and the end cover assembly 230 is too large, which is not conducive to increasing the volume of the electrode assembly 210, thereby affecting the improvement of the energy density of the energy storage device 200.

[0164] See also Figure 15 and Figure 16 The embodiment of the present application further provides an electric device 300 , which includes a device body 310 and an energy storage device 200 provided in the present application, and the energy storage device 200 supplies power to the device body 310 .

[0165] In an embodiment of the present application, the energy storage device 200 has high safety performance and high energy density, and can provide a stable power supply for the device body 310.

[0166] Optionally, the electrical equipment 300 in the embodiment of the present application can be, but is not limited to, portable electronic devices such as mobile phones, tablet computers, laptop computers, desktop computers, smart toys, smart bracelets, smart watches, e-readers, game consoles, toys, etc.; it can also be large equipment such as battery cars, electric vehicles, ships, spacecraft, etc. The present application Figure 16 The electrical equipment 300 provided by the embodiment of the present application is an energy storage battery cabinet.

[0167] It can be understood that the electrical equipment described in this embodiment is only one form of the electrical equipment to which the battery is applied, and should not be construed as a limitation on the electrical equipment provided by the present application, nor should it be construed as a limitation on the batteries provided by various embodiments of the present application.

[0168] When "embodiment" or "embodiment mode" is mentioned in the present application, it means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in each embodiment of the present application can be combined arbitrarily without conflict with each other to form another embodiment that does not depart from the spirit and scope of the technical solution of the present application.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An adapter assembly, characterized in that, The transfer component includes: A transfer piece, which includes a first transfer portion, a first bending portion, a connecting portion, a second bending portion, and a second transfer portion connected in sequence; in the first direction, the first transfer portion, the connecting portion, and the second transfer portion are stacked in sequence; and A buckle member, which is inserted into the connecting portion. Part of the buckle member is located between the first transfer portion and the connecting portion, and part of it is located between the connecting portion and the second transfer portion. The buckle member is used to form a first gap between the first transfer portion and the connecting portion, and a second gap between the second transfer portion and the connecting portion; the buckle member includes a first buckle sub-member and a second buckle sub-member. The first buckle sub-member and the second buckle sub-member are inserted into the connecting portion at intervals. The first buckle sub-member is at least partially inserted between the first transfer portion and the connecting portion and is close to the first bending portion. The first buckle sub-member is used to form a first gap between the first transfer portion and the connecting portion; the second buckle sub-member is at least partially inserted between the second transfer portion and the connecting portion and is close to the second bending portion. The second buckle sub-member is used to form a second gap between the second transfer portion and the connecting portion; both the first buckle sub-member and the second buckle sub-member include a first clamping portion, a second clamping portion, and a third clamping portion connected in sequence; the first clamping portion and the third clamping portion are respectively located on the same side of the second clamping portion. In the first direction, the first clamping portion and the third clamping portion are stacked.

2. The adapter assembly according to claim 1, wherein The value L1 of the first gap satisfies the range: 1.5 mm ≤ L1 ≤ 4 mm; the value L2 of the second gap satisfies the range: 1.5 mm ≤ L2 ≤ 4 mm.

3. The adapter assembly according to claim 1, characterized in that, The first bending portion is arc-shaped, and the curvature radius r1 of the first bending portion satisfies the range: 1 mm ≤ r1 ≤ 2 mm; the second bending portion is arc-shaped, and the curvature radius r2 of the second bending portion satisfies the range: 1 mm ≤ r1 ≤ 2 mm.

4. The adapter assembly according to claim 1, wherein The connecting portion includes a body portion and a plurality of ribs. The ribs connect the body portion. In the second direction, the opposite ends of the body portion are respectively connected to the first bending portion and the second bending portion. The length directions of the plurality of ribs are parallel to the second direction; wherein, the second direction is the length direction of the connecting portion, and the second direction intersects the first direction.

5. The adapter assembly according to claim 1, characterized in that: The thickness of the first bending portion is less than the thickness of the first transfer portion; the thickness of the second bending portion is less than the thickness of the second transfer portion.

6. The adapter assembly according to claim 5, wherein The ratio a of the thickness of the first bending portion to the thickness of the first transfer portion satisfies the range: 0.45 ≤ a ≤ 0.9; the ratio b of the thickness of the second bending portion to the thickness of the second transfer portion satisfies the range: 0.45 ≤ b ≤ 0.

9.

7. The adapter assembly according to claim 4, wherein In the direction perpendicular to the second direction, at least one of the opposite ends of the first bending portion is provided with a notch, and at least one of the opposite ends of the second bending portion is provided with a notch.

8. The adapter assembly according to claim 1, wherein The first clamping portion includes a first clamping body and a first protrusion, and the first protrusion is arranged on the surface of the first clamping body away from the third clamping portion; the third clamping portion includes a second clamping body and a second protrusion, and the second protrusion is arranged on the surface of the second clamping body away from the first clamping portion, and the first protrusion and the second protrusion are arranged at the same end of the first clip component; the first protrusion and the second protrusion of the first clip component are both arranged away from the second clip component; the first protrusion and the second protrusion of the second clip component are both arranged away from the first clip component.

9. The adapter assembly according to claim 8, wherein The first clamping portion also includes a third protrusion, which is arranged on the surface of the first clamping body away from the third clamping portion, and is arranged at an end of the first clamping body away from the first protrusion; the third clamping portion also includes a fourth protrusion, which is arranged on the surface of the second clamping body away from the second clamping portion, and is arranged at an end of the second clamping body away from the second protrusion.

10. The adapter assembly according to claim 1, wherein The fastener includes a first part, a second part and a third part which are connected to each other. The first part and the third part are respectively located on the same side of the second part. The first part and the third part are stacked along the first direction. The first part includes a first main body part and a fifth protrusion. The number of the fifth protrusions is two, and the two fifth protrusions are both arranged on the surface of the first main body part away from the third part, and are respectively arranged at the opposite ends of the first main body part; the third part includes a second main body part and a sixth protrusion. The number of the sixth protrusions is two, and the two sixth protrusions are both arranged on the surface of the second main body part away from the first part, and are respectively arranged at the opposite ends of the second main body part.

11. An energy storage device, characterized in that, The energy storage device comprises: Electrode assembly; a current collecting plate, the current collecting plate being located at one side of the electrode assembly and being electrically connected to the electrode assembly; The adapter assembly according to any one of claims 1 to 10, wherein the adapter assembly is located on a side of the current collecting disk away from the electrode assembly, and the second adapter portion of the adapter assembly is electrically connected to the current collecting disk; and an end cap assembly, the end cap assembly being disposed on a side of the adapter assembly facing away from the electrode assembly and being electrically connected to the first adapter portion of the adapter assembly; Wherein, along the first direction, an end portion of the second bent portion facing away from the second adapter portion is arranged closer to the end cover assembly than an end portion of the first bent portion facing away from the first adapter portion.

12. An electrical equipment, comprising: Equipment body; The energy storage device of claim 11, wherein the energy storage device supplies power to the device body.

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