Power module series crimping structure and energy storage inverter

Abstract

The utility model relates to the technical field of energy storage, in particular to a power module series crimping structure and an energy storage inverter. The power module string crimping structure in the energy storage inverter comprises an installation frame, a power module string and crimping assemblies, the power module string comprises a power device and a heat dissipation device which are connected in series, the crimping assemblies are arranged at the two axial ends of the power module string, each crimping assembly comprises a plane abutting end and a spherical abutting end, and the plane abutting end is connected with the spherical abutting end. The plane abutting end is in abutting contact with the power module string along the axis of the power module string, and the spherical abutting end is in spherical contact with the mounting frame, so that the rotation angle of the crimping assembly and the mounting frame can be adjusted according to actual requirements, and the abutting contact effect of the plane crimping end and the power module string is adjusted. Therefore, sufficient surface contact between the heat dissipation device and the power device in the power module string is ensured, and the problem of insufficient contact caused by tiny deformation, machining tolerance or assembly tolerance of the power device or the heat dissipation device is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a power module string crimping structure and an energy storage inverter. Background Art

[0002] The power conversion system (PCS) is the core component that realizes the bidirectional flow of electric energy between the energy storage system and the power grid. It is used to control the charging and discharging process of the battery and perform AC / DC conversion. With the continuous development of energy storage technology, energy storage inverters are gradually developing in the direction of high integration. However, the highly integrated structural characteristics easily lead to poor heat dissipation of power devices in energy storage inverters.

[0003] In the related art, the power devices in the energy storage inverter usually dissipate heat through surface contact with the heat sink. Specifically, the power device and the heat sink are connected in series, and a disc spring is used to abut the power device and the heat sink together to achieve heat dissipation of the power device. In the actual working process, due to the influence of factors such as slight deformation of the power device and the heat sink, manufacturing accuracy and assembly accuracy, there is an uneven contact problem between the power device and the heat sink surface, resulting in excessive or insufficient local pressure between the power device and the heat sink. It is easy for the power device to be damaged or the heat dissipation to be poor.

[0004] Therefore, it is urgent to invent a power module string crimping structure and an energy storage inverter to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a power module string crimping structure and an energy storage inverter to ensure sufficient surface contact between the power device and the heat dissipation device, and to ensure the heat dissipation effect of the heat dissipation device on the power device.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The power module string crimping structure includes:

[0008] Install the frame;

[0009] A power module string, wherein the power module string includes power devices and heat dissipation devices connected in series; and

[0010] The crimping components are arranged at the axial ends of the power module string, and each of the crimping components includes a planar abutment end and a spherical abutment end. The planar abutment end is in pressure contact with the power module string along the axis of the power module string, and the spherical abutment end is in spherical contact with the mounting frame.

[0011] As an optional solution, the mounting frame includes:

[0012] Support columns;

[0013] A first pressing plate and a second pressing plate are arranged opposite to each other along the axial direction of the power module string, the support column is used to connect and fix the first pressing plate and the second pressing plate, and the power module string is arranged between the first pressing plate and the second pressing plate;

[0014] A first mating component and a second mating component, either one of the first mating component and the second mating component is arranged on the crimping plate, and the other is arranged on the second crimping plate, and the spherical butt ends on the two crimping components are in spherical contact with the first mating component and the second mating component respectively.

[0015] As an optional solution, the first mating component is arranged at the first crimping plate, and the first mating component includes:

[0016] A first ball connector, in spherical contact with the spherical contact end of the crimping assembly;

[0017] A transition piece, wherein the first ball connector is fixed on the transition piece along the axial direction of the power module string, and a ball connector portion of the first ball connector extends out of an end of the transition piece close to the crimping assembly; and

[0018] An elastic driving member, one end of which abuts against the end surface of the first crimping plate close to the crimping assembly, and the other end abuts against the adapter, and the elastic driving member is configured to drive the first ball joint to move toward the direction close to the crimping assembly.

[0019] As an optional solution, the adapter includes a first adapter portion and a second adapter portion that are coaxially arranged, and the diameter of the first adapter portion is smaller than the diameter of the second adapter portion;

[0020] An avoidance through hole is provided on the first crimping plate, and the inner diameter of the avoidance through hole is greater than or equal to the diameter of the first adapter part and smaller than the diameter of the second adapter part. The elastic driving component is sleeved on the outer periphery of the first adapter part, and one end of the elastic driving component abuts against the end surface of the first crimping plate close to the crimping assembly, and the other end abuts against the second adapter part.

[0021] As an optional solution, a positioning groove is formed on the end surface of the first crimping plate close to the crimping assembly, and the elastic driving member is partially accommodated in the positioning groove.

[0022] As an optional solution, the first ball connection member comprises a limiting portion, a penetration portion and the ball connection portion which are connected in sequence, and the diameter of the penetration portion is equal to or greater than the diameter of the ball connection portion and smaller than the diameter of the limiting portion;

[0023] The adapter is provided with a first fixing through hole and a second fixing through hole which are coaxially connected, wherein the first fixing through hole is located at an end of the second fixing through hole which is away from the crimping assembly.

[0024] The inner diameter of the first fixing through hole is matched with the diameter of the limiting portion, and the inner diameter of the second fixing through hole is matched with the diameter of the penetration portion.

[0025] As an optional solution, the second mating component is arranged at the second crimping plate, and the second mating component includes:

[0026] a second ball connector, in spherical contact with the spherical contact end of the crimping assembly; and

[0027] The docking seat is connected and fixed to the second ball connector along the axial direction of the power module string. The second crimping plate is provided with a docking groove. One end of the docking seat away from the second ball connector is docked and fixed to the docking groove.

[0028] As an optional solution, the crimping assembly includes:

[0029] A crimping piece, wherein a ball joint groove is provided on the crimping piece, and the crimping piece is in spherical contact with the mounting frame through the ball joint groove. The end of the crimping piece away from the ball joint groove is in press contact with the power module string along the axis of the power module string. The end of the crimping piece with the ball joint groove is the spherical surface contact end, and the end of the crimping piece away from the ball joint groove is the plane contact end.

[0030] As an optional solution, the crimping assembly further includes:

[0031] An insulating member is provided with a receiving groove, the planar abutting end is matched with the receiving groove, and the insulating member is in pressing contact with the power module string along the axial direction of the power module string.

[0032] The energy storage inverter includes a casing, a control system and the power module string crimping structure as described above, wherein the power module string crimping structure is accommodated in the casing, and the control system is used to control the opening and closing of the power devices in the power module string crimping structure.

[0033] Beneficial effects of the utility model:

[0034] The power module string crimping structure provided by the utility model forms a power module string by connecting power devices and heat dissipation devices in series, and arranging crimping assemblies at both axial ends of the power module string, so that the planar crimping end of each crimping assembly is in pressure contact with the power module string along the axial direction of the power module string, and the spherical butt end of each crimping assembly is in spherical contact with the mounting frame, and the rotation angle of the spherical butt end of the crimping assembly and the mounting frame can be adjusted according to actual needs, thereby adjusting the pressure contact effect of the planar crimping end of the crimping assembly and the power module string, ensuring sufficient surface contact between the heat dissipation device and the power device in the power module string, solving the problem of insufficient contact caused by slight deformation of the power device or the heat dissipation device, processing tolerance or assembly tolerance, and improving the heat dissipation effect of the power device.

[0035] The present embodiment also provides an energy storage inverter, which ensures sufficient surface contact between the heat sink and the power device in the power module string by applying the above-mentioned power module string crimping structure, solves the problem of insufficient contact caused by slight deformation of the power device or the heat sink, processing tolerance or assembly tolerance, improves the heat dissipation effect of the power device, and further improves the safety of the energy storage inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a half-section structural schematic diagram of a power module string crimping structure provided by an embodiment of the utility model;

[0037] Figure 2 It is a schematic diagram of the full cross-section structure of the power module string crimping structure provided by the embodiment of the utility model;

[0038] Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0039] Figure 4 It is a structural schematic diagram of a first ball joint provided by an embodiment of the utility model;

[0040] Figure 5 It is a structural schematic diagram of a second matching component provided in an embodiment of the utility model;

[0041] Figure 6 It is a structural schematic diagram of the crimping assembly provided in an embodiment of the utility model.

[0042] In the figure:

[0043] 100, mounting frame; 110, first crimping plate; 111, avoidance through hole; 112, positioning groove; 120, supporting column; 130, first matching component; 131, first ball joint; 1311, penetration portion; 1312, limiting portion; 1313, ball joint; 132, adapter; 1321, first adapter; 1322, second adapter; 1323, first fixed through hole; 1324, second fixed through hole; 133, elastic driving member; 140, second crimping plate; 141, docking groove; 150, second matching component; 151, second ball joint; 152, docking seat;

[0044] 200, power module string; 210, power device; 220, heat dissipation device; 230, elastic reset member;

[0045] 300, crimping assembly; 310, crimping member; 311, ball joint groove; 320, insulating member; 321, accommodating groove; 330, plane abutting end; 340, spherical surface abutting end. DETAILED DESCRIPTION

[0046] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0047] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0050] In the related art, the power devices in the energy storage inverter usually dissipate heat through surface contact with the heat sink. Specifically, the power device and the heat sink are connected in series, and a disc spring is used to abut the power device and the heat sink together to achieve heat dissipation of the power device. In the actual working process, due to the influence of factors such as slight deformation of the power device and the heat sink, manufacturing accuracy and assembly accuracy, there is an uneven contact problem between the power device and the heat sink surface, resulting in excessive or insufficient local pressure between the power device and the heat sink. It is easy for the power device to be damaged or the heat dissipation to be poor.

[0051] In order to solve the above problems, Figure 1 to Figure 6 As shown, this embodiment provides a power module string crimping structure. The power module string crimping structure includes a mounting frame 100, a power module string 200, and a crimping assembly 300, wherein the power module string 200 includes a power device 210 and a heat sink 220 connected in series, and the crimping assembly 300 is arranged at both axial ends of the power module string 200, and each crimping assembly 300 includes a plane abutting end 330 and a spherical abutting end 340, the plane abutting end 330 is in press contact with the power module string 200 along the axis of the power module string 200, and the spherical abutting end 340 is in spherical contact with the mounting frame 100.

[0052] The power module string crimping structure forms a power module string 200 by connecting a power device 210 and a heat dissipation device 220 in series, and arranges crimping assemblies 300 at both ends of the axial direction of the power module string 200, so that the planar crimping end of each crimping assembly 300 is in pressure contact with the power module string 200 along the axial direction of the power module string 200, and the spherical contact end 340 of each crimping assembly 300 is in spherical contact with the mounting frame 100, and the rotation angle of the spherical contact end 340 of the crimping assembly 300 and the mounting frame 100 can be adjusted according to actual needs, thereby adjusting the pressure contact effect of the planar crimping end of the crimping assembly 300 and the power module string 200, ensuring sufficient surface contact between the heat dissipation device 220 and the power device 210 in the power module string 200, solving the problem of insufficient contact caused by slight deformation, processing tolerance or assembly tolerance of the power device 210 or the heat dissipation device 220, and improving the heat dissipation effect of the power device 210.

[0053] In an optional embodiment, the power module string 200 also includes an elastic reset member 230, which is connected in series with the power device 210 and the heat sink 220, and the elastic reset member 230 is sandwiched between the two heat sinks 220. When the power module string 200, the crimping assembly 300 and the mounting frame 100 are assembled together, the crimping assemblies 300 located at both ends of the axial direction of the power module string 200 will press the power module string 200 towards each other. At this time, the power device 210 and the heat sink 220 in the power module string 200 will compress the elastic reset member 230, and the elastic reset member 230 will reset under the action of its own elastic force, thereby driving the power device 210 and the heat sink 220 to further press against each other, further ensuring the surface contact effect of the power device 210 and the heat sink 220. It should be noted that in this embodiment, the elastic reset member 230 is a disc spring, which has a large load, a short stroke, and a small required space. It is not only convenient to use in combination, but also easy to repair and replace, and has high economic and safety. In other embodiments, the elastic return member 230 may also be a coil spring, other spring types, or other elastic structures, which is not specifically limited in this embodiment.

[0054] like Figure 1 and Figure 2 As shown, in the power module string crimping structure provided in this embodiment, the axial direction of the power module string 200 is the up-down direction, and the power module string crimping structure provided in this embodiment includes two power module strings 200 extending in the up-down direction, and crimping assemblies 300 are provided at both ends of each power module string 200, and each crimping assembly 300 is in spherical contact with the mounting frame 100. In other embodiments, the specific number of power module strings 200 can also be adjusted according to actual needs, and this embodiment does not make a specific limitation.

[0055] Combination Figure 1 and Figure 2 The specific structure of the mounting frame 100 is described. The mounting frame 100 includes a supporting column 120, a first crimping plate 110 and a second crimping plate 140 which are arranged opposite to each other along the axial direction of the power module string 200, a first mating component 130 and a second mating component 150, wherein the supporting column 120 is used to connect and fix the first crimping plate 110 and the second crimping plate 140, the power module string 200 is arranged between the first crimping plate 110 and the second crimping plate 140, any one of the first mating component 130 and the second mating component 150 is arranged at the first crimping plate 110, and the other is arranged at the second crimping plate 140, and the spherical mating ends 340 on the two crimping components 300 are in spherical contact with the first mating component 130 and the second mating component 150 respectively.

[0056] By setting a first crimping plate 110 and a second crimping plate 140 opposite to each other along the axial direction of the power module string 200, using a support column 120 to connect and fix the first crimping plate 110 and the second crimping plate 140, the power module string 200 is clamped between the first crimping plate 110 and the second crimping plate 140, and a first mating component 130 is set on any one of the first crimping plate 110 and the second crimping plate 140, and a second mating component 150 is set on the other, so that the spherical mating ends 340 on the two crimping components 300 are in spherical contact with the first mating component 130 and the second mating component 150 respectively, thereby achieving the effect of pressing the power module string 200 along the axial direction of the power module string 200, with a simple structure and ingenious design.

[0057] It should be noted that, in this embodiment, the axial direction of the power module string 200 is the up-down direction, and the first pressing plate 110 is arranged at the upper end of the power module string 200, the second pressing plate 140 is arranged at the lower end of the power module string 200, and the first matching component 130 is arranged at the first pressing plate 110, and the second matching component 150 is arranged at the second pressing plate 140. In other embodiments, the specific axial direction of the power module string 200 can also be adjusted arbitrarily according to actual needs, and the first matching component 130 can also be arranged at the second pressing plate 140, and the second matching component 150 can be arranged at the first pressing plate 110, which is not specifically limited in this embodiment.

[0058] In addition, in this embodiment, four support columns 120 are arranged in the mounting frame 100, and the first crimping plate 110 and the second crimping plate 140 are rectangular plates of the same size. The four support columns 120 are respectively arranged at the four corners of the rectangular plate to ensure the structural strength of the mounting frame 100.

[0059] As an alternative, Figure 1 to Figure 3As shown, the first mating component 130 includes a first ball connector 131, an adapter 132 and an elastic driving component 133, wherein the first ball connector 131 is in spherical contact with the spherical connecting end 340 of the crimping component 300, the first ball connector 131 is passed through and fixed on the adapter 132 along the front-to-back direction, and the ball connecting portion 1313 of the first ball connector 131 extends out of the lower end of the adapter 132 close to the crimping component 300, one end of the elastic driving component 133 abuts against the lower end surface of the first crimping plate 110 close to the crimping component 300, and the other end abuts against the adapter 132, and the elastic driving component 133 is configured to drive the first ball connector 131 to move toward the direction close to the crimping component 300. By setting the first ball connector 131 to be passed through and fixed on the adapter 132, and making the ball connector portion 1313 of the first ball connector 131 extend out of the lower end of the adapter 132, it can be ensured that the ball connector portion 1313 is in spherical contact with the spherical contact end 340 of the crimping assembly 300. By setting the elastic driving member 133, one end of the elastic driving member 133 is abutted against the lower end surface of the first crimping plate 110, and the other end is abutted against the adapter 132. The elastic driving member 133 drives the adapter 132 and the first ball connector 131 to move toward the direction close to the crimping assembly 300, which can ensure the pressing effect of the crimping assembly 300 on the power module string 200.

[0060] In an optional embodiment, the adapter 132 includes a first adapter portion 1321 and a second adapter portion 1322 that are coaxially arranged, the diameter of the first adapter portion 1321 is smaller than the diameter of the second adapter portion 1322, an avoidance through hole 111 is opened on the first crimping plate 110, the inner diameter of the avoidance through hole 111 is greater than or equal to the diameter of the first adapter portion 1321 and smaller than the diameter of the second adapter portion 1322, and the elastic driving member 133 is sleeved on the outer periphery of the first adapter portion 1321, one end of the elastic driving member 133 abuts against the lower end surface of the first crimping plate 110 close to the crimping assembly 300, and the other end abuts against the upper end surface of the second adapter portion 1322. By configuring the adapter 132 to be a first adapter portion 1321 and a second adapter portion 1322 that are coaxially connected, the diameter of the first adapter portion 1321 is made smaller than the diameter of the second adapter portion 1322, and an avoidance through hole 111 is opened on the first crimping plate 110, so that the inner diameter of the avoidance through hole 111 is greater than or equal to the diameter of the first adapter portion 1321, and the elastic driving component 133 is sleeved on the outer periphery of the first adapter portion 1321, and one end of the elastic driving component 133 is abutted against the lower end surface of the first crimping plate 110, and the other end is abutted against the upper end surface of the second adapter portion 1322, thereby achieving the effect of driving the adapter 132 and the first ball joint 131 to move toward the direction close to the crimping assembly 300.

[0061] It should be noted that in this embodiment, the elastic driving member 133 is a disc spring, which has a large load, a short stroke, and a small space. It is not only convenient to use in combination, but also easy to repair and replace, and has high economic and safety. In other embodiments, the elastic driving member 133 can also be a coil spring, other spring types, or other elastic structures, which are not specifically limited in this embodiment.

[0062] In order to further improve the driving effect of the elastic driving member 133, a positioning groove 112 is provided on the lower end surface of the first crimping plate 110 close to the crimping assembly 300, and the elastic driving member 133 is partially accommodated in the positioning groove 112. By providing the positioning groove 112 for accommodating the elastic driving member 133 on the lower end surface of the first crimping plate 110, the positioning of the elastic driving member 133 is achieved, thereby ensuring the driving accuracy of the elastic driving member 133 on the adapter 132 and the first ball connector 131.

[0063] In addition, in other embodiments, a similar positioning groove may be provided on the upper end surface of the second adapter portion 1322 to further improve the positioning accuracy of the elastic driving member 133 and thereby improve the driving effect of the elastic driving member 133, which is not specifically limited in this embodiment.

[0064] In an alternative embodiment, if Figure 3 and Figure 4As shown, the first ball connector 131 includes a limiting portion 1312, a penetration portion 1311 and a ball connector 1313 which are connected in sequence. The diameter of the penetration portion 1311 is equal to or greater than the diameter of the ball connector 1313 and smaller than the diameter of the limiting portion 1312. A first fixing through hole 1323 and a second fixing through hole 1324 which are coaxially connected are provided in the adapter 132. The first fixing through hole 1323 is located at the upper end of the second fixing through hole 1324 away from the crimping assembly 300. The inner diameter of the first fixing through hole 1323 is matched with the diameter of the limiting portion 1312, and the inner diameter of the second fixing through hole 1324 is matched with the diameter of the penetration portion 1311. The first ball connector 131 is arranged to sequentially connect the limiting portion 1312, the penetration portion 1311 and the ball connector 1313, so that the diameter of the penetration portion 1311 is equal to or greater than the diameter of the ball connector 1313 and smaller than the diameter of the limiting portion 1312, and at the same time, a first fixing through hole 1323 and a second fixing through hole 1324 are provided on the adapter 132 to be coaxially connected, the first fixing through hole 1323 is arranged away from the upper end of the second fixing through hole 1324, and the diameter of the limiting portion 1312 is equal to or greater than the diameter of the ball connector 1313, and smaller than the diameter of the limiting portion 1312. The inner diameter of the through hole 1323 is adapted, and the diameter of the penetration portion 1311 is adapted to the inner diameter of the second fixed through hole 1324. When the first ball connector 131 and the adapter 132 are penetrated and fixed, the ball connector portion 1313 of the first ball connector 131 is extended into the adapter 132 along the first fixed through hole 1323 until the limiting portion 1312 is clamped and fixed to the first fixed through hole 1323, and the penetration portion 1311 is clamped and fixed to the second fixed through hole 1324, thereby achieving the effect of the first ball connector 131 being penetrated and fixed on the adapter 132.

[0065] It should be noted that, in this embodiment, the first ball connection member 131 is a ball screw, the penetration portion 1311 is the screw portion of the ball screw, the limiting portion 1312 is the nut portion of the ball screw, and the ball connection portion 1313 is the ball head portion of the ball screw. The diameter of the penetration portion 1311 is greater than the diameter of the ball connection portion 1313. In other embodiments, the diameter of the penetration portion 1311 may be equal to the diameter of the ball connection portion 1313, which is not specifically limited in this embodiment.

[0066] As an alternative, Figure 1 , Figure 2 as well as Figure 5As shown, the second mating component 150 includes a second ball connector 151 and a docking seat 152 connected in sequence along the axial direction (up and down direction) of the power module string 200, a docking groove 141 is provided on the second crimping plate 140, the docking seat 152 is docked and fixed with the docking groove 141, and the second ball connector 151 is in spherical contact with the crimping component 300. Since the first mating component 130 arranged at the upper end of the power module string 200 can press the power module string 200, in order to simplify the structure of the crimping structure of the power module string, it is only necessary to ensure that the second mating component 150 can be in spherical contact with the crimping component 300. In other embodiments, the second mating component 150 can also be set to the same structure as the first mating component 130, which is not specifically limited in this embodiment.

[0067] Combination Figure 1 , Figure 2 as well as Figure 6 The specific structure of the crimping assembly 300 is described. The crimping assembly 300 includes a crimping piece 310, which is provided with a ball connection groove 311. The crimping piece 310 is in spherical contact with the mounting frame 100 through the ball connection groove 311, and the lower end of the crimping piece 310 away from the ball connection groove 311 is pressed against the power module string 200 along the up and down direction.

[0068] In order to further improve the protection of the power module string 200, the crimping assembly 300 also includes an insulating member 320, wherein the upper end of the insulating member 320 is provided with a receiving groove 321, and the lower end of the crimping member 310 away from the ball connection groove 311 is adapted to the receiving groove 321, and the insulating member 320 is pressed and contacted with the power module string 200 along the axial direction of the power module string 200. By additionally providing the insulating member 320, the insulating member 320 is used to achieve the insulated contact between the crimping member 310 and the power module string 200, and by providing the receiving groove 321 adapted to the lower end of the crimping member 310 at the upper end of the insulating member 320, the docking accuracy of the crimping member 310 and the insulating member 320 can be guaranteed, thereby ensuring the crimping effect of the power module string 200.

[0069] It should be noted that, in this embodiment, the insulating member 320 is made of rubber material, which not only has good insulation, but also has good elasticity, toughness and wear resistance, and has a long service life. In other embodiments, the insulating member 320 may also be made of other insulating materials, which is not specifically limited in this embodiment.

[0070] In other embodiments, a receiving groove compatible with the power module string 200 may also be provided at the lower end of the insulating member 320 to improve the docking accuracy between the insulating member 320 and the power module string 200, which is not specifically limited in this embodiment.

[0071] In addition, in other embodiments, an insulating coating may also be coated on the lower end surface of the crimping piece 310 to achieve insulating crimping between the crimping piece 310 and the power module string 200, which is not specifically limited in this embodiment.

[0072] This embodiment also provides an energy storage inverter. The energy storage inverter includes a housing, a control system, and the above-mentioned power module string crimping structure. The power module string crimping structure is accommodated in the housing, and the control system is used to control the opening and closing of the power device 210 in the power module string crimping structure. The energy storage inverter ensures sufficient surface contact between the heat dissipation device 220 and the power device 210 in the power module string 200 by applying the above-mentioned power module string crimping structure, solves the problem of insufficient contact caused by slight deformation, processing tolerance or assembly tolerance of the power device 210 or the heat dissipation device 220, improves the heat dissipation effect of the power device 210, and thus improves the safety of the use of the energy storage inverter.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. The power module string crimping structure is characterized by: include: Mounting frame (100); A power module string (200), the power module string (200) comprising a power device (210) and a heat dissipation device (220) connected in series; and The crimping assemblies (300) are arranged at two axial ends of the power module string (200), and each of the crimping assemblies (300) comprises a planar abutting end (330) and a spherical abutting end (340). The planar abutting end (330) is in abutting contact with the power module string (200) along the axis of the power module string (200), and the spherical abutting end (340) is in spherical contact with the mounting frame (100).

2. The power module string crimping structure according to claim 1, characterized in that: The installation frame (100) comprises: Support column (120); A first crimping plate (110) and a second crimping plate (140) are arranged opposite to each other along the axial direction of the power module string (200); the support column (120) is used to connect and fix the first crimping plate (110) and the second crimping plate (140); and the power module string (200) is arranged between the first crimping plate (110) and the second crimping plate (140); A first mating component (130) and a second mating component (150), wherein either one of the first mating component (130) and the second mating component (150) is arranged on the crimping plate (110), and the other is arranged on the second crimping plate (140), and the spherical mating ends (340) on the two crimping components (300) are in spherical contact with the first mating component (130) and the second mating component (150), respectively.

3. The power module string crimping structure according to claim 2, characterized in that: The first mating component (130) is arranged at the first crimping plate (110), and the first mating component (130) comprises: A first ball connector (131) in spherical contact with the spherical contact end (340) of the crimping assembly (300); an adapter (132), wherein the first ball connector (131) is fixed on the adapter (132) along the axial direction of the power module string (200), and a ball connector portion (1313) of the first ball connector (131) extends out of an end of the adapter (132) close to the crimping assembly (300); and An elastic driving member (133), one end of which abuts against the end surface of the first crimping plate (110) close to the crimping assembly (300), and the other end abuts against the adapter (132), and the elastic driving member (133) is configured to drive the first ball joint (131) to move in a direction close to the crimping assembly (300).

4. The power module string crimping structure according to claim 3, characterized in that: The adapter (132) comprises a first adapter portion (1321) and a second adapter portion (1322) which are coaxially arranged, and the diameter of the first adapter portion (1321) is smaller than the diameter of the second adapter portion (1322); The first crimping plate (110) is provided with an avoidance through hole (111), the inner diameter of the avoidance through hole (111) is greater than or equal to the diameter of the first adapter part (1321) and smaller than the diameter of the second adapter part (1322), the elastic driving member (133) is sleeved on the outer periphery of the first adapter part (1321), one end of the elastic driving member (133) abuts against the end surface of the first crimping plate (110) close to the crimping assembly (300), and the other end abuts against the second adapter part (1322).

5. The power module string crimping structure according to claim 4, characterized in that: A positioning groove (112) is provided on the end surface of the first crimping plate (110) close to the crimping assembly (300), and the elastic driving member (133) is partially accommodated in the positioning groove (112).

6. The power module string crimping structure according to claim 3, characterized in that: The first ball connection member (131) comprises a limiting portion (1312), a penetration portion (1311) and the ball connection portion (1313) which are connected in sequence, and the diameter of the penetration portion (1311) is equal to or greater than the diameter of the ball connection portion (1313) and smaller than the diameter of the limiting portion (1312); The adapter (132) is provided with a first fixing through hole (1323) and a second fixing through hole (1324) which are coaxially connected. The first fixing through hole (1323) is located at an end of the second fixing through hole (1324) which is away from the crimping assembly (300). The inner diameter of the first fixing through hole (1323) is matched with the diameter of the limiting portion (1312), and the inner diameter of the second fixing through hole (1324) is matched with the diameter of the penetration portion (1311).

7. The power module string crimping structure according to claim 2, characterized in that: The second mating component (150) is arranged at the second crimping plate (140), and the second mating component (150) comprises: A second ball joint (151) is in spherical contact with the spherical contact end (340) of the crimping assembly (300); and The docking seat (152) is connected and fixed to the second ball connector (151) along the axial direction of the power module string (200); a docking groove (141) is provided on the second crimping plate (140); and one end of the docking seat (152) away from the second ball connector (151) is docked and fixed to the docking groove (141).

8. The power module string crimping structure according to claim 1, characterized in that: The crimping assembly (300) comprises: A crimping piece (310) is provided with a ball connection groove (311), and the crimping piece (310) is in spherical contact with the mounting frame (100) through the ball connection groove (311); one end of the crimping piece (310) away from the ball connection groove (311) is in press contact with the power module string (200) along the axis of the power module string (200); one end of the crimping piece (310) provided with the ball connection groove (311) is the spherical surface contact end (340), and one end of the crimping piece (310) away from the ball connection groove (311) is the planar contact end (330).

9. The power module string crimping structure according to claim 8, characterized in that: The crimping assembly (300) further comprises: An insulating member (320), wherein a receiving groove (321) is provided on the insulating member (320), the planar abutting end (330) is adapted to the receiving groove (321), and the insulating member (320) is in pressing contact with the power module string (200) along the axial direction of the power module string (200).

10. Energy storage inverter, characterized in that: It comprises a casing, a control system and a power module string crimping structure as described in any one of claims 1 to 9, wherein the power module string crimping structure is accommodated in the casing, and the control system is used to control the opening and closing of the power device (210) in the power module string crimping structure.

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