A current-carrying terminal, an inverter, and a power supply

Abstract

This utility model discloses a current-carrying terminal, wherein the current-carrying terminal (100) includes a first U-shaped groove (10), a first connecting end (20), and a second connecting end (30). A first fixing hole (11) is provided between the two side walls of the first U-shaped groove (10). The first connecting end (20) and the second connecting end (30) are used to connect cables for current transmission. The first connecting end (20) and the second connecting end (30) are arranged side by side. The first connecting end (20) and the second connecting end (30) are connected to the first fixing hole (11) by bolts (60), and the first connecting end (20) and the second connecting end (30) are fixed to the first fixing hole (11) by nuts (61). After being energized, the first connecting end (20) and the second connecting end (30) are conductive. This utility model reduces the copper busbars used in the past. Through structural improvements, the terminal volume is reduced, the fastening process and production and development costs are reduced, and the current-carrying capacity, product competitiveness and production efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of power distribution, and in particular to a current-carrying terminal, an inverter, and a power supply. Background Technology

[0002] In electrical connections, wire connectors (current-carrying terminals) are typically used to transmit current. Currently, conventional current-carrying terminals usually use copper busbars as the conductive medium and connect two OT terminals (O-type terminals) through the copper busbars. Since the copper busbars need a certain cross-sectional area to meet the current-carrying requirements, the overall size of the current-carrying terminals is relatively large, occupying too much installation space and hindering the miniaturization design of equipment. In addition, there is contact resistance at the contact surface between the copper busbars and the OT terminals, and the number of overlaps increases the overall contact impedance, affecting the current-carrying capacity. Moreover, the material and processing costs of copper busbars are high, which increases the overall terminal manufacturing cost and is not conducive to production. Utility Model Content

[0003] The main purpose of this invention is to propose a current-carrying terminal that aims to solve the problems of large size, high production cost, high impedance and poor current-carrying capacity in the prior art.

[0004] To achieve the above objectives, this utility model proposes a current-carrying terminal, including a first U-shaped groove, wherein a first fixing hole is provided between the two side walls of the first U-shaped groove;

[0005] A first connection end and a second connection end are used to connect a cable, and the first connection end and the second connection end are arranged side by side.

[0006] The first connecting end and the second connecting end are connected to the first fixing hole by bolts, and the first connecting end and the second connecting end are fixed to the first fixing hole by nuts;

[0007] After power is applied, the first connection terminal and the second connection terminal are connected.

[0008] Optionally, the first connecting end and the second connecting end are arranged side by side in the vertical direction, so that the first connecting hole and the second connecting hole correspond to each other. The first connecting end is provided with a first connecting hole, and the second connecting end is provided with a second connecting hole. The bolt passes through the first connecting hole and the second connecting hole from top to bottom to connect the first connecting end and the second connecting end to the first fixing hole, so that the first connecting end and the second connecting end are in contact with each other.

[0009] Optionally, the surface area of ​​the second connecting end is larger than that of the first connecting end, a second fixing hole is provided between the two side walls of the first U-shaped groove, and a third connecting hole is provided at the second connecting end. The third connecting hole is corresponding to the second fixing hole, and the third connecting hole and the second fixing hole are connected by the bolt.

[0010] Optionally, the bolt is located at the bottom of the first U-shaped groove, and the bolt passes through the first fixing hole, the second connecting hole and the first connecting hole in sequence to connect the second connecting end and the first connecting end to the first U-shaped groove.

[0011] Optionally, the diameter of the first fixing hole is larger than the diameter of the bolt's thread.

[0012] Optionally, the current-carrying terminal further includes a second U-shaped groove, the second U-shaped groove being provided with a third fixing hole, the second U-shaped groove and the first U-shaped groove being arranged horizontally side by side, and the first connecting end and the second connecting end being respectively provided in the first fixing hole and the third fixing hole.

[0013] Optionally, the current-carrying terminal further includes:

[0014] A copper fixing plate is connected to the first connecting end and the second connecting end through mounting holes. When energized, the first connecting end and the second connecting end are connected through the copper fixing plate.

[0015] Optionally, the mounting holes are provided in multiple locations.

[0016] Optionally, the mounting hole at one end of the copper fixing plate is provided corresponding to the first connecting hole and connected between the first connecting end and the first U-shaped groove, and the mounting hole at the other end of the copper fixing plate is provided corresponding to the second connecting hole and connected between the second connecting end and the second U-shaped groove.

[0017] Optionally, baffles are provided on both sides of the first U-shaped groove, and the baffles are higher than the first connecting end and / or the second connecting end.

[0018] Optionally, the first U-shaped groove is further provided with a first limiting groove, which is located on the outer periphery of the first fixing hole and communicates with the first fixing hole.

[0019] This utility model also provides an inverter, which includes an IGBT power module and the current-carrying terminal, and the current-carrying terminal is connected to the IGBT power module.

[0020] This utility model also provides a power supply, wherein the inverter includes a charging component and the current-carrying terminal, and the current-carrying terminal is connected to the charging component.

[0021] This invention improves the structure of the current-carrying terminal by directly connecting the first and second connection ends to the first U-shaped groove and fixing them with bolts and nuts. This reduces the need for conventional connections via copper busbars, saving space in the first U-shaped groove and reducing copper busbar costs. The resulting terminal is smaller, occupies less space, and allows for smaller product sizes, improving product competitiveness. In practical applications, the first connection end can be directly locked to the second connection end of the client, reducing the increased contact resistance caused by multiple connections (via copper busbars), improving current-carrying capacity, reducing costs, improving connection reliability, reducing space volume, and increasing production line efficiency.

[0022] The current-carrying terminal implemented in this invention can be applied in inverters and power supplies, making inverters and power supplies more compact, lower in cost, and more reliable. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the first embodiment of the current-carrying terminal 100 of this utility model;

[0025] Figure 2 This is an exploded view of the first embodiment of the current-carrying terminal 100 of this utility model;

[0026] Figure 3 This is a cross-sectional schematic diagram of the first embodiment of the current-carrying terminal 100 of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the first U-shaped groove 10 in the current-carrying terminal 100 of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the first embodiment of the current-carrying terminal 100 of this utility model;

[0029] Figure 6 This is an exploded view of the first embodiment of the current-carrying terminal 100 of this utility model;

[0030] Figure 7 This is a schematic diagram of the structure of the second embodiment of the current-carrying terminal 100 of this utility model;

[0031] Figure 8 This is an exploded view of the second embodiment of the current-carrying terminal 100 of this utility model;

[0032] Figure 9 This is a schematic diagram of the structure of the third embodiment of the current-carrying terminal 100 of this utility model;

[0033] Figure 10 This is an exploded view of the third embodiment of the current-carrying terminal 100 of this utility model;

[0034] Figure 11 This is a schematic diagram of the structure of the first U-shaped groove 10 and the second U-shaped groove 50 in the current-carrying terminal 100 of this utility model.

[0035] Explanation of icon numbers:

[0036]

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] In the field of electrical connections, wire connectors (current-carrying terminals) are key components for current transmission, especially in applications requiring high current such as photovoltaic inverters, energy storage inverters, vehicle chargers, and server power supplies. The performance and structural design of current-carrying terminals directly affect the safety and efficiency of the system. Currently, conventional current-carrying terminals typically use copper busbars as the conductive medium, and two OT terminals (O-type terminals) are electrically connected through the copper busbars.

[0042] However, existing current-carrying terminals are supplied as a single piece of plastic housing, bolt, copper busbar, and nut. As a highly conductive material, the copper busbar has high raw material and processing costs, which increases the overall terminal manufacturing cost and is not conducive to large-scale application. Moreover, the copper busbar requires a certain cross-sectional area to meet the current carrying requirements, which makes the copper busbar occupy a lot of space in the terminal, resulting in a large overall size and taking up too much installation space, which is not conducive to the miniaturization design of equipment.

[0043] Regarding current carrying capacity, existing solutions require connecting two OT terminals via copper busbars. However, the contact surfaces between the copper busbars and OT terminals have contact resistance, which, when combined, increases the overall contact impedance, affecting current carrying capacity and potentially causing localized overheating and reducing system reliability. With repeated overlaps, the impedance deteriorates further. This not only increases the number of times the copper busbars of the client's OT terminals and the product side overlap with the copper busbars integrated into the current-carrying terminals, but also increases assembly complexity. Furthermore, the increased contact surfaces further enhance contact impedance, limiting current carrying capacity and potentially affecting long-term stability.

[0044] To address the problems existing in the prior art, this application proposes a current-carrying terminal 100, which is directly connected to a first connecting end 20 and a second connecting end 30, and simultaneously disposed within the first fixing hole 11 of a first U-shaped groove 10. The alignment of the first connecting hole 21 and the second connecting hole 31 allows the bolt 60 to simultaneously limit and connect both, and then a nut 61 is used for fixation. This reduces the bulky and inconvenient assembly problems associated with traditional copper busbars, and also reduces the number of parts required for assembling the copper busbar, such as screws. After power is applied, the first connecting end 20 and the second connecting end 30 are conductive, preventing the decrease in current-carrying capacity caused by repeated contact with the copper busbar. This improves the reliability of the current-carrying terminal 100, reduces product cost, decreases space volume, and increases production line efficiency. This current-carrying terminal 100 includes at least the following three embodiments:

[0045] Example 1:

[0046] refer to Figure 1 and Figure 2The first connecting end 20 and the second connecting end 30 can be used to connect wires or cables. Both are made of conductive metal. The first connecting end 20 is provided with a first connecting hole 21, and the second connecting end 30 is provided with a second connecting hole 31. The first connecting hole 21 and the second connecting hole 31 are used to connect the first connecting end 20 and the second connecting end 30 on the first U-shaped groove 10. A first fixing hole 11 is provided between the side walls of the first U-shaped groove 10. The bolt 60 connects the three together by passing through the first fixing hole 11, the first connecting hole 21 and the second connecting hole 31. When the terminal is supplied, the copper busbar is removed, and only the direct connection between the first U-shaped groove 10, the first connecting end 20 and the second connecting end 30 is made conductive, thus saving costs.

[0047] During production and assembly, the first connecting end 20 and the second connecting end 30 extend in opposite directions (the direction can be changed according to actual needs). The first connecting end 20 and the second connecting end 30 are arranged side by side in the vertical direction and aligned with the first fixing hole 11. The first connecting end 20 and the second connecting end 30 are connected to the first fixing hole 11 from top to bottom by bolts 60, and the first connecting end 20 and the second connecting end 30 are fixed to the first fixing hole 11 by nuts 61. The nut 61 is located in the first fixing hole 11 or the first limiting groove 13. (Refer to...) Figure 3 and Figure 4 In this embodiment, the nut 61 is located inside the first fixing hole 11. That is, the diameter of the first fixing hole 11 is adapted to the nut 61, which can save the space of the first U-shaped groove 10. At the same time, it limits and fixes the first connecting end 20 and the second connecting end 30. During assembly, it reduces the locking and installation of the copper busbar and improves production efficiency.

[0048] Optionally, in other embodiments, the diameter of the first fixing hole 11 can be adapted to the bolt 60, and the nut 61 can also be disposed within the first limiting groove 13, see reference. Figure 5 and Figure 6 Bolt 60 passes through the bottom of the first U-shaped groove 10 upwards, and multiple nuts 61 can be provided, which can be respectively set above the first connector 20 and in the first limiting groove 13, to fix the first connector 20 and the second connector 30 to the first fixing hole 11 and strengthen the connection.

[0049] After power is applied, the first connection terminal 20 and the second connection terminal 30 are connected, reducing the traditional use of copper busbars for conduction and saving costs. The stacked arrangement of the first connection terminal 20 and the second connection terminal 30 saves space in the first U-shaped groove 10, miniaturizing the structure of the current-carrying terminal 100 and improving product competitiveness. During latching, the first connection terminal 20 can be directly latched to the second connection terminal 30, reducing the increase in contact resistance caused by multiple connections and improving current carrying capacity.

[0050] Example 2:

[0051] refer to Figure 7 and Figure 8 The first U-shaped groove 10 has a first fixing hole 11 and a second fixing hole 12 arranged side by side on its sidewalls. The surface area of ​​the second connecting end 30 is larger than that of the first connecting end 20, which increases the contact area between the second connecting end 30 and the first U-shaped groove 10, making the connection more stable. The second connecting end 30 has a second connecting hole 21 and a third connecting hole 32. The second limiting groove 15 is located on the outer periphery of the second fixing hole 12. There are two bolts 60. The first connecting hole 21, the second connecting hole 31 and the first fixing hole 11 are connected by one of the bolts 60. The connecting hole 32 is connected to the second fixing hole 12 by another bolt 60. Both bolts 60 are located at the bottom of the first U-shaped groove 10 and connect the first connecting end 20 and the second connecting end 30 from bottom to top, so that the first connecting end 20 and the second connecting end 30 are stepped. They are fixed by locking with nuts 61. Multiple nuts 61 are respectively located at the top of the first connecting end 20 and the second connecting end 30, and in the first limiting groove 13 and the second limiting groove 15 between the second connecting end 30 and the first U-shaped groove 10, which improves the reliability of the connection.

[0052] The diameters of the first fixing hole 11 and the second fixing hole 12 are larger than the diameter of the screw of the bolt 60, allowing the screw to move up, down, left, and right. When the nut 61 is fastened to the first connecting end 20 and the second connecting end 30, the screw can move in a matching manner at any time, ensuring that the first connecting end 20, the second connecting end 30 and the screw can be connected by fastening alone, reducing the increase in insulation resistance caused by uneven fastening and improving the current carrying capacity.

[0053] This embodiment not only reduces the cost of copper busbars and allows the first connecting end 20 and the second connecting end 30 to make direct contact, but also provides two fixing holes (first fixing hole 11 and second fixing hole 12) in the first U-shaped groove 10, which improves the fixation degree between the second connecting end 30 and the first U-shaped groove 10. At the same time, it controls the overall structure of the current-carrying terminal 100 to be as small as possible, reducing the production process of locking copper busbars.

[0054] Example 3:

[0055] refer to Figure 9 and Figure 10The current-carrying terminal 100 has a first U-shaped groove 10 and a second U-shaped groove 50. The second U-shaped groove 50 has the same structure as the first U-shaped groove 10. The first U-shaped groove 10 is provided with a first fixing hole 11 and a first limiting groove 13 is provided on the outer periphery of the first fixing hole 11. The second U-shaped groove 50 is provided with a third fixing hole 51 and a groove 52 is provided on the outer periphery of the third fixing hole 51. The second U-shaped groove 50 and the first U-shaped groove 10 are arranged horizontally side by side. The first connecting end 20 and the second connecting end 30 are respectively provided in the first fixing hole 11 and the third fixing hole 51. The copper fixing plate 40 is connected to the first connecting end 20 and the second connecting end 30 through the mounting hole 41. After being powered on, the first connecting end 20 and the second connecting end 30 are connected through the copper fixing plate 40. The copper fixing plate 40 not only strengthens the connection between the first connecting end 20 and the second connecting end 30, but also directly connects to the first connecting end 20 and the second connecting end 30, saving the locking structure that was previously required to fix the copper busbar.

[0056] refer to Figure 11 The first limiting groove 13 and the groove 52 are both used to accommodate the nut 61, so as to save space in the current-carrying terminal 100 and make the overall structure smaller.

[0057] The mounting holes 41 are provided in multiple ways. The mounting holes 41 at one end of the copper fixing plate 40 are located between the first connecting end 20 and the first U-shaped groove 10, and the mounting holes 41 at the other end are located between the second connecting end 30 and the second U-shaped groove 50, so that the first connecting end 20 and the second connecting end 30 are connected. The first connecting end 20 and the second connecting end 30 are arranged in the same direction. Therefore, the multiple mounting holes 41 provided on the other side of the copper fixing plate 40 also facilitate the connection of the current-carrying terminal 100 to other clients.

[0058] By adding a copper busbar fixing structure, the current-carrying terminal 100 reduces the need for copper busbar fixing as in the original solution. The copper fixing plate 40 is directly connected to the first connection terminal 20 and the second connection terminal 30, which also reduces the cost of using screws and the process of using screws to fasten the copper busbar. It eliminates the need for multiple contacts and improves the current-carrying capacity of the current-carrying terminal 100.

[0059] Based on the aforementioned embodiments, baffles 14 are provided on both sides of the first U-shaped groove 10 and the second U-shaped groove 50. The baffles 14 are higher than the first connecting end 20 and the second connecting end 30 to limit the wires or cables. In the aforementioned embodiments, the first connecting end 20 and the second connecting end 30 can be arranged relative to each other or facing each other to meet the required current flow. In practical applications, the required connection direction can be achieved by arranging the first U-shaped groove 10 or the second U-shaped groove 50.

[0060] This utility model also proposes an inverter, which includes an IGBT power module and a current-carrying terminal 100. The specific structure of the current-carrying terminal 100 is as described in the above embodiments. Since the inverter adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0061] For example, it can be applied in photovoltaic inverters and energy storage inverters. The current-carrying terminal 100 is connected to the IGBT power module to provide a current input or output channel for the IGBT power module, making the structural connection between inverters more robust, resulting in lower product costs and reduced space volume, making the inverter smaller and more competitive.

[0062] This utility model also proposes a power supply, which includes a charging component and a current-carrying terminal 100. The specific structure of the current-carrying terminal 100 is as described in the above embodiments. Since the power supply adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The power supply includes, but is not limited to, vehicle chargers and server power supplies. The current-carrying terminal 100 is connected to its charging component, giving the power supply advantages such as low impedance, higher current carrying capacity, and small size, thus enabling the power supply to have more application scenarios.

[0063] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A current-carrying terminal (100), characterized in that, include: A first U-shaped groove (10) is provided between the two side walls of the first U-shaped groove (10) and a first fixing hole (11). A first connecting end (20) and a second connecting end (30), the first connecting end (20) and the second connecting end (30) are used to connect cables, and the first connecting end (20) and the second connecting end (30) are arranged side by side; The first connecting end (20) and the second connecting end (30) are connected to the first fixing hole (11) by bolts (60), and the first connecting end (20) and the second connecting end (30) are fixed to the first fixing hole (11) by nuts (61). After power is applied, the first connection terminal (20) and the second connection terminal (30) are connected.

2. The current-carrying terminal (100) as described in claim 1, characterized in that, The first connecting end (20) is provided with a first connecting hole (21), and the second connecting end (30) is provided with a second connecting hole (31). The first connecting end (20) and the second connecting end (30) are arranged side by side in the vertical direction, so that the first connecting hole (21) and the second connecting hole (31) correspond to each other. The bolt (60) passes through the first connecting hole (21) and the second connecting hole (31) to connect the first connecting end (20) and the second connecting end (30) to the first fixing hole (11), so that the first connecting end (20) and the second connecting end (30) are in contact with each other.

3. The current-carrying terminal (100) as described in claim 2, characterized in that, The bolt (60) is located at the bottom of the first U-shaped groove (10). The bolt (60) passes sequentially through the first fixing hole (11), the second connecting hole (31), and the first connecting hole (21) to connect the second connecting end (30) and the first connecting end (20) to the first U-shaped groove (10); and / or, The diameter of the first fixing hole (11) is larger than the diameter of the bolt (60).

4. The current-carrying terminal (100) as described in claim 2, characterized in that, The surface area of ​​the second connecting end (30) is greater than that of the first connecting end (20). A second fixing hole (12) is provided between the two side walls of the first U-shaped groove (10). The second connecting end (30) is also provided with a third connecting hole (32). The third connecting hole (32) is correspondingly provided with the second fixing hole (12). The bolt (60) passes through the third connecting hole (32) and the second fixing hole (12) and is located in the first U-shaped groove (10).

5. The current-carrying terminal (100) as described in claim 1, characterized in that, The current-carrying terminal (100) also includes a second U-shaped groove (50), the second U-shaped groove (50) is provided with a third fixing hole (51), the second U-shaped groove (50) and the first U-shaped groove (10) are arranged horizontally side by side, and the first connecting end (20) and the second connecting end (30) are respectively provided in the first fixing hole (11) and the third fixing hole (51).

6. The current-carrying terminal (100) as described in claim 5, characterized in that, The current-carrying terminal (100) also includes: A copper fixing plate (40) is connected to the first connecting end (20) and the second connecting end (30). When energized, the first connecting end (20) and the second connecting end (30) are connected through the copper fixing plate (40).

7. The current-carrying terminal (100) as described in claim 6, characterized in that, The copper fixing plate (40) is provided with a plurality of mounting holes (41). The mounting hole (41) at one end of the copper fixing plate (40) is set corresponding to the first connecting hole (21) and connected between the first connecting end (20) and the first U-shaped groove (10). The mounting hole (41) at the other end of the copper fixing plate (40) is set corresponding to the second connecting hole (31) and connected between the second connecting end (30) and the second U-shaped groove (50).

8. The current-carrying terminal (100) as described in any one of claims 1 to 7, characterized in that, The first U-shaped groove (10) is further provided with a first limiting groove (13), which is located on the outer periphery of the first fixing hole (11) and communicates with the first fixing hole (11); and / or, the two side walls of the first U-shaped groove (10) are provided with baffles (14), which are higher than the first connecting end (20) and / or the second connecting end (30).

9. An inverter, characterized in that, The inverter includes an IGBT power module and a current-carrying terminal (100) as described in any one of claims 1 to 7, wherein the current-carrying terminal (100) is connected to the IGBT power module.

10. A power supply, characterized in that, The inverter includes a charging component and a current-carrying terminal (100) as described in any one of claims 1 to 7, the current-carrying terminal (100) being connected to the charging component.

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