A composite busbar for energy storage converters

Abstract

A composite busbar for energy storage converter, comprising a first pole plate assembly, a second pole plate assembly, a third pole plate assembly, and three insulation layers located on the same side of the first, second, and third pole plate assemblies. The second pole plate assembly and the third pole plate assembly are located on both sides of the first pole plate assembly. The first, second, and third pole plate assemblies respectively comprise first, second, and third pole plates, multiple sets of first, second, and third hole assemblies, and multiple sets of first, second, and third fixing assemblies. The first, second, and third hole assemblies respectively comprise first, second, and third hole rows and first, second, and third through holes, and the first, second, and third hole rows are arranged in staggered manner. The first, second, and third fixing assemblies respectively comprise first, second, and third fixing protrusions and first, second, and third fixing through holes. The second fixing assembly and the third fixing assembly are arranged in staggered manner with the first fixing assembly to facilitate locking installation.

Description

Technical Field

[0001] This utility model belongs to the field of composite busbar technology, and in particular a composite busbar for energy storage converters. Background Technology

[0002] Energy storage converters are mainly used to connect energy storage systems to the power grid or electrical charge to achieve bidirectional energy conversion. Composite busbars are a crucial component of the inverter module in energy storage converters. However, existing composite busbars are formed by layering multiple individual busbars through high-temperature, high-pressure hot pressing. Before hot pressing, the precision of locking and positioning between multiple individual busbars needs to be manually confirmed, resulting in significant accuracy errors. Furthermore, the insulating film covering the surface of each busbar is easily damaged during the pressing process, thus affecting the performance of the finished busbar.

[0003] For example, in the utility model patent with publication number CN207098214U, the positive busbar, negative busbar, and AC busbar are only synthesized by lamination. However, the precision positioning before lamination cannot be guaranteed, and the insulating film covering the surface of the busbar is easily damaged during the lamination process, which in turn affects the performance of the finished busbar. Summary of the Invention

[0004] In view of this, the present invention provides a composite busbar for an energy storage converter to solve the above problems.

[0005] A composite busbar for an energy storage converter includes a first electrode assembly, a second electrode assembly located on one side of the first electrode assembly, a third electrode assembly located on the other side of the first electrode assembly, and three insulating layers arranged alternately between the first, second, and third electrode assemblies. The first, second, and third electrode assemblies each include a first, second, and third electrode plate, multiple sets of first, second, and third countersunk hole assemblies located on the first, second, and third electrode plates respectively, and multiple sets of first, second, and third fixing assemblies located on the first, second, and third electrode plates respectively. The second electrode plate also includes multiple sets of first clearance holes for avoiding the first and third fixing assemblies. The third electrode plate also includes second clearance holes for avoiding the first and second fixing assemblies. The first, second, and third countersunk hole assemblies each include a first, second, and third countersunk hole row and two first, second, and third through holes. The two first through holes are located on both sides of the first countersunk hole row, the two second through holes are located on one side of the second countersunk hole row, and the two third through holes are located on one side of the third countersunk hole row and are positioned opposite to one side of the second countersunk hole row. The first, second, and third countersunk holes are staggered. The first, second, and third fixing components each include a first, second, and third fixing protrusion and a first, second, and third fixing through hole. The first fixing protrusion is adapted to the size and shape of the third fixing through hole, and the second fixing protrusion is adapted to the size and shape of the first fixing through hole. The second and third fixing protrusions are located on the same side and opposite to the first fixing protrusion, and the second and third fixing components are staggered from the first fixing component. The second and third electrode plates are fixed to both sides of the first electrode plate. Insulating films are covered on both sides of the surfaces of the first, second, and third electrode plates. The insulating layers protect the first, second, and third electrode plates from damage to the insulating film during installation, which could lead to poor insulation.

[0006] Furthermore, the first electrode assembly is used to carry the second electrode assembly and the third electrode assembly, and it also includes a first pin located on one side of the first electrode assembly.

[0007] Furthermore, the second electrode assembly also includes a second pin located on one side of the second electrode.

[0008] Furthermore, the third electrode assembly also includes a third pin located on one side of the third electrode, wherein the first, second, and third pins are staggered and located on the same side.

[0009] Furthermore, the first, second, and third rows of countersunk holes each include multiple countersunk holes spaced apart.

[0010] Furthermore, the insulating layer includes an insulating layer body and a set of clearance components located on the insulating layer.

[0011] Furthermore, the clearance assembly includes a plurality of first clearance holes located on the insulating layer, and a plurality of second clearance holes located on the insulating layer and spaced apart from the first clearance holes.

[0012] Furthermore, the first clearance hole is used to avoid obstructing the first, second, and third countersunk hole assemblies.

[0013] Furthermore, the second clearance hole is used to avoid obstructing the first, second, and third fixing components.

[0014] Compared with existing technologies, the composite busbar for energy storage converters provided by this utility model features first, second, and third countersunk hole assemblies and first, second, and third fixing assemblies respectively on the first, second, and third electrode plates. The first, second, and third countersunk hole assemblies are staggered to facilitate locking and installation. The first, second, and third fixing assemblies each include first, second, and third fixing protrusions and first, second, and third fixing through holes. The first fixing protrusion and the third fixing through hole are matched in size and shape, as are the second fixing protrusion and the first fixing through hole. The second electrode plate and the third electrode plate are located on opposite sides of the first electrode plate and are connected and fixed to it. Three insulating layers are also spaced apart on the same side of the first, second, and third electrode plates. These insulating layers prevent damage to the insulating film on the electrode plate surface during installation, thus preventing poor insulation and enhancing the insulation performance of the busbar. Attached Figure Description

[0015] Figure 1 A schematic diagram of the composite busbar for an energy storage converter provided by this utility model.

[0016] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the composite busbar used in the energy storage converter. Detailed Implementation

[0017] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0018] like Figure 1 and Figure 2The diagram shows a structural schematic of a composite busbar for an energy storage converter provided by this utility model. The composite busbar for the energy storage converter includes a first electrode assembly 10, a second electrode assembly 20 located on one side of the first electrode assembly 10, a third electrode assembly 30 located on the other side of the first electrode assembly 10, and three insulating layers 40 arranged alternately between the first electrode assembly 10, the second electrode assembly 20, and the third electrode assembly 30. The composite busbar for the energy storage converter also includes other functional modules, such as assembly components for the composite busbar, which should be known to those skilled in the art and will not be described in detail here.

[0019] like Figure 2 As shown, the first electrode plate assembly 10 is used to overlap and support the second electrode plate assembly 20 and the third electrode plate assembly 30. It includes a first electrode plate 11, multiple sets of first countersunk hole assemblies 12 located on the first electrode plate 11, multiple sets of first fixing assemblies 13 located on the first electrode plate 11 and spaced apart from the first countersunk hole assemblies 12, and a first pin 14 located on one side of the first electrode plate 11.

[0020] The first electrode plate 11 is used to support the first countersunk hole assembly 12, the first fixing assembly 13, and the first pin 14, and it can be a rectangular plate. It is easy to imagine that the two sides of the first electrode plate 11 are covered with an insulating film for insulation, and an IGBT power module is also disposed on it for power conversion and control. This should be well known to those skilled in the art, and will not be described in detail here.

[0021] The number of the first countersunk hole assemblies 12 is determined by the size of the first electrode plate 11. In this embodiment, there are three sets of the first countersunk hole assemblies 12. The three sets of the first countersunk hole assemblies 12 have the same structure and function. Only one set will be briefly described below. The first countersunk hole assembly 12 includes a set of first countersunk hole rows 121 and two first through holes 122 located on both sides of the first countersunk hole rows 121.

[0022] The first countersunk hole row 121 is used for welding external conductive copper pillars. It is located between the two first through holes 122 and perpendicular to the arrangement direction of the two first through holes 122. The first countersunk hole row 121 includes a plurality of countersunk holes 1211 spaced apart. The number of countersunk holes 1211 is determined by the length of the first countersunk hole row 121. In this embodiment, the number of countersunk holes 1211 is four.

[0023] The number of the first fixing components 13 is determined by the size of the first electrode plate 11. They are distributed in multiple rows and columns on the first electrode plate 11 in sequence. In this embodiment, the first fixing components 13 have seven rows and six columns. Multiple fixing components have the same structure and function; only one set will be briefly described below.

[0024] The first fixing component 13 is used to cooperate with the second and third fixing components 23 and 33 described below to fix the second electrode assembly 20 and the third electrode assembly 30 to the first electrode assembly 10. The first fixing component 13 includes a first fixing protrusion 131 and a first fixing through hole 132 spaced apart from the first fixing protrusion 131.

[0025] The first fixing protrusion 131 is a cylindrical protrusion, and the first fixing through hole 132 is a circular through hole. The outer radius of the first fixing protrusion 131 is equal to the inner radius of the first fixing through hole 132.

[0026] The first pin 14 is used to guide the current output of the first electrode assembly 10 to the electrical device, which should be well known to those skilled in the art and will not be described in detail here.

[0027] like Figure 2 As shown, the second electrode plate assembly 20 includes a second electrode plate 21, multiple sets of second countersunk hole assemblies 22 located on the second electrode plate 21, multiple sets of second fixing assemblies 23 located on the second electrode plate 21 and spaced apart from the second countersunk hole assemblies 22, a second pin 24 located on one side of the second electrode plate 21, and multiple sets of first clearance holes 25 located on the second electrode plate 21.

[0028] The two sides of the second electrode plate 21 are also covered with an insulating film for insulation.

[0029] The number of the second countersunk hole assemblies 22 is determined by the number of the first countersunk hole assemblies 12. In this embodiment, the number of the second countersunk hole assemblies 22 is also three sets. The second countersunk hole assembly 22 includes a set of second countersunk hole rows 221 and two second through holes 222 located on the same side of the second countersunk hole rows 221. The second countersunk hole rows 221 have the same structure as the first countersunk hole rows 121, which includes a plurality of countersunk holes 1211 spaced apart.

[0030] Each set of the second fixing components 23 includes a second fixing protrusion 231 and a second fixing through hole 232 spaced apart from the second fixing protrusion 231. The second fixing protrusion 231 and the first fixing through hole 132 are adapted in size and shape to facilitate the second electrode plate 21 to be snapped and fixed on the first electrode plate 11.

[0031] The first clearance hole 25 is used to avoid the first fixing component 13 and the third fixing component 33 described below. It can be a circular hole with a diameter larger than that of the first fixing component 13 and the third fixing component 33.

[0032] like Figure 2 As shown, the third electrode plate assembly 30 includes a third electrode plate 31, multiple sets of third countersunk hole assemblies 32 located on the third electrode plate 31, multiple sets of third fixing assemblies 33 located on the third electrode plate 31 and spaced apart from the third countersunk hole assemblies 32, a third pin 34 located on one side of the third electrode plate 31, and multiple sets of second clearance holes 35 located on the third electrode plate 31.

[0033] The third electrode plate 31 has insulating films covering both sides for insulation. The third electrode plate 31, the second electrode plate 21, and the first electrode plate 11 have the same size and shape, and are stacked together and pressed together under high temperature and high pressure to form a composite busbar. IGBT modules are installed on the first, second, and third electrode plates 11, 21, and 31 for power conversion and control, which should be well known to those skilled in the art and will not be described in detail here.

[0034] The number of third countersunk hole assemblies 32 is determined by the number of first countersunk hole assemblies 12. In this embodiment, the number of third countersunk hole assemblies 32 is three sets. Each third countersunk hole assembly 32 includes a set of third countersunk hole rows 321 and two third through holes 322 located on the same side of the third countersunk hole rows 321. The third countersunk hole rows 321 have the same structure as the first countersunk hole rows 121, and also include a plurality of countersunk holes 1211 spaced apart.

[0035] The third countersunk hole row 321, the second countersunk hole row 221, and the first countersunk hole row 121 are staggered. During hot pressing, the second countersunk hole row 221 passes through the first clearance hole 43, the first through hole 122, and the third through hole 322. The first countersunk hole row 121 passes through the first clearance hole 43 and the third through hole 322. The third countersunk hole row 321 passes through the first clearance hole 43. This allows the first, second, and third countersunk hole rows 121, 221, and 321 to be exposed on the surface of the busbar for easy subsequent installation and welding of conductive copper blocks.

[0036] Each set of the third fixing components 33 includes a third fixing protrusion 331 and a third fixing through hole 332 spaced apart from the third fixing protrusion 331. The size and shape of the third fixing through hole 332 are adapted to the first fixing protrusion 131 to facilitate the third electrode plate 31 to be snapped and fixed on the first electrode plate 11.

[0037] The third fixing component 33 and the second fixing component 23 are respectively offset from the first fixing component 13, that is, the third fixing protrusion 331 and the second fixing protrusion 231 are located on the same side, and this side is opposite to the first fixing protrusion 131. During hot pressing, the second fixing component 23 overlaps and is fixed to the first fixing component 13 on one side of the first electrode plate 11 and is exposed through the second clearance hole 35 to facilitate subsequent electrode terminal connection. The third fixing component 33 overlaps and is fixed to the first fixing component 13 on the other side of the first electrode plate 11. The first, second, and third fixing components 13, 23, and 33 cooperate with each other, realizing that devices can be overlapped on both sides of the first electrode plate 11, which not only improves the space utilization efficiency, but also facilitates locking installation due to the offset arrangement.

[0038] like Figure 1 As shown, the first pin 14, the second pin 24, and the third pin 34 are all staggered and located on the same side of the first electrode assembly 10, the second electrode assembly 20, and the third electrode assembly 30.

[0039] The second clearance hole 35 is used to avoid the first fixing component 13 and the second fixing component 23, and it can be a circular through hole.

[0040] The three insulating layers 40 are respectively located on the same side of the first electrode assembly 10, the second electrode assembly 20, and the third electrode assembly 30. This is to prevent damage to the insulating film on the surfaces of the first electrode assembly 10, the second electrode assembly 20, and the third electrode assembly 30 during hot-pressing, thus preventing poor insulation and enhancing the insulation performance of the composite busbar. The insulating layers 40 can be made of insulating paper or epoxy material.

[0041] The three insulating layers 40 have the same structure and function; only one of them will be briefly described here. The insulating layer 40 includes an insulating layer body 41 and a set of clearance components 42 located on the insulating layer 40.

[0042] The clearance assembly 42 includes a plurality of first clearance holes 43 located on the insulating layer 40, and a plurality of second clearance holes 44 located on the insulating layer 40 and spaced apart from the first clearance holes 43.

[0043] The first clearance hole 43 is used to clear the first, second, and third countersunk hole assemblies 12, 22, and 32, and it can be a rectangular hole.

[0044] The second clearance hole 44 is used to avoid the first, second, and third fixing components 13, 23, and 33, and it can be a circular hole.

[0045] Compared with the prior art, the composite busbar for energy storage converter provided by this utility model is provided with first, second, and third countersunk hole assemblies 12, 22, and 32 and first, second, and third fixing assemblies 13, 23, and 33 respectively on the first, second, and third electrode plates 11, 21, and 31. The first, second, and third countersunk hole assemblies 12, 22, and 32 are staggered to facilitate locking and installation. The first, second, and third fixing assemblies 13, 23, and 33 respectively include first, second, and third fixing protrusions 131, 231, and 331 and first, second, and third fixing through holes 132, 232, and 332. The size and shape of the first fixing protrusion 131 and the third fixing through hole 332 are adapted to each other, and the size and shape of the second fixing protrusion 232 and the first fixing through hole 132 are adapted to each other. The second electrode plate 21 and the third electrode plate 31 are respectively located on both sides of the first electrode plate 11 and are connected and fixed to the first electrode plate 11. Three insulating layers 40 are also provided at intervals on the same side of the first, second, and third electrode plates 11, 21, and 31. The insulating layers 40 are used to prevent the insulating film on the surface of the electrode plates from being damaged during installation, thereby causing poor insulation. The insulating layers 40 enhance the insulation performance of the busbar.

[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A composite busbar for an energy storage converter, characterized in that: The composite busbar for the energy storage converter includes a first electrode assembly, a second electrode assembly located on one side of the first electrode assembly, a third electrode assembly located on the other side of the first electrode assembly, and three insulating layers arranged alternately between the first, second, and third electrode assemblies. The first, second, and third electrode assemblies each include a first, second, and third electrode plate, multiple sets of first, second, and third countersunk hole assemblies located on the first, second, and third electrode plates respectively, and multiple sets of first, second, and third fixing assemblies located on the first, second, and third electrode plates respectively. The second electrode plate also includes multiple sets of first clearance holes for avoiding the first and third fixing assemblies, and the third electrode plate also includes second clearance holes for avoiding the first and second fixing assemblies. The first, second, and third countersunk hole assemblies each include a first, second, and third countersunk hole row and two first, second, and third through holes. The two first through holes are located on the first... On both sides of the countersunk hole array, two second through holes are located on one side of the second countersunk hole array, and two third through holes are located on one side of the third countersunk hole array and are positioned opposite to one side of the second countersunk hole array. The first, second, and third countersunk hole arrays are staggered. The first, second, and third fixing components each include a first, second, and third fixing protrusion and a first, second, and third fixing through hole. The size and shape of the first fixing protrusion and the third fixing through hole are adapted to each other. The size and shape of the second fixing protrusion and the first fixing through hole are adapted to each other. The second fixing protrusion and the third fixing protrusion are located on the same side and are positioned opposite to the first fixing protrusion. The second and third fixing components are staggered from the first fixing components. The second electrode plate and the third electrode plate are fixed on both sides of the first electrode plate. The surfaces of the first, second, and third electrode plates are covered with an insulating film. The insulating layer is used to protect the first, second, and third electrode plates from damage to the insulating film on their surfaces during installation, which would lead to poor insulation.

2. The composite busbar for an energy storage converter as described in claim 1, characterized in that: The first electrode assembly is used to carry the second electrode assembly and the third electrode assembly, and it also includes a first pin located on one side of the first electrode assembly.

3. The composite busbar for an energy storage converter as described in claim 2, characterized in that: The second electrode assembly also includes a second pin located on one side of the second electrode.

4. The composite busbar for an energy storage converter as described in claim 3, characterized in that: The third electrode assembly also includes a third pin located on one side of the third electrode, and the first, second and third pins are staggered and located on the same side.

5. The composite busbar for an energy storage converter as described in claim 1, characterized in that: The first, second, and third rows of countersunk holes each include multiple countersunk holes spaced apart.

6. The composite busbar for an energy storage converter as described in claim 1, characterized in that: The insulating layer includes an insulating layer body and a set of clearance components located on the insulating layer.

7. The composite busbar for an energy storage converter as described in claim 6, characterized in that: The clearance assembly includes a plurality of first clearance holes located on the insulating layer, and a plurality of second clearance holes located on the insulating layer and spaced apart from the first clearance holes.

8. The composite busbar for an energy storage converter as described in claim 7, characterized in that: The first clearance hole is used to avoid the first, second, and third countersunk hole assemblies.

9. The composite busbar for an energy storage converter as described in claim 7, characterized in that: The second clearance hole is used to avoid obstructing the first, second, and third fixing components.

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