Electric connector and inverter

Abstract

The invention discloses an electric connector and an inverter. The electric connector comprises a terminal seat and a first terminal connecting module arranged on the terminal seat, wherein the terminal seat is provided with a first terminal and a second terminal; the first terminal connecting module comprises a connecting piece, and the first terminal is connected and conducted with the second terminal through the connecting piece; the first terminal connecting module further comprises a first row seat and a first push plate, the first row seat and the terminal seat are fixedly connected or integrally arranged, a first step hole is formed in the first row seat, and the connecting piece penetrates to the first side of the first row seat from the first step hole; the first push plate is located on the second side of the first row seat and abuts against the connecting piece so that the connecting piece can be fixed to the first row seat.

Description

[0001] This application is a divisional application of the invention patent with application number 2024107325949 and application date June 7, 2024. Technical Field

[0002] The invention belongs to the field of inverters and relates to an electric connector and an inverter. Background Art

[0003] One or more electrical connectors are set outside the inverter box, through which external power equipment such as the grid or load is connected. For example, the grid-connected inverter needs to use an off-grid connector to achieve flexible switching between the inverter energy storage system and the grid, allowing the energy storage system to switch freely between grid-connected mode and off-grid mode. In grid-connected mode, the energy storage system can work synchronously with the public power grid to realize functions such as charging (grid supplies power to the energy storage device), discharging (energy storage device transmits power to the grid) and participating in grid dispatching; in off-grid mode, the energy storage system can operate independently to provide power guarantee for power loads without grid coverage or when the grid fails.

[0004] The energy storage off-grid connector integrates core components such as converters and controllers, and has bidirectional power flow control capabilities, which can ensure smooth transition when switching between different modes, guarantee power quality, and meet grid safety regulations and protection requirements. The connector is widely used in distributed energy systems, microgrids, renewable energy power generation systems, and emergency backup power supplies, improving the stability and reliability of the power system and promoting the efficient use of clean energy.

[0005] In the existing energy storage off-grid connector, the terminal seat and the protective cover are fixed by bolts, and the connection and locking operation with the inverter box is complicated; moreover, if maintenance is required, it is troublesome to disassemble.

[0006] Based on this, Chinese patent CN219659048U proposes a through-wall terminal and inverter, in which the shell structure includes a cover and a base. When it is necessary to connect the external cable and the internal components of the inverter, first connect the shell structure to the box of the inverter, then remove the cover from the base, connect the external cable to one end of the wiring structure in the connection cavity, and connect the other end of the wiring structure to the internal components of the inverter, and finally, lock the cover on the base with multiple screws. However, this structure still has the problem of inconvenient maintenance and disassembly. In addition, the existing solutions also have the problem of inconvenient terminal connection. Summary of the invention

[0007] In view of this, the present invention provides an improved electrical connector and inverter.

[0008] The present invention provides an electrical connector, comprising a terminal seat and a first terminal connection module arranged on the terminal seat, wherein the terminal seat is provided with a first terminal and a second terminal; the first terminal connection module comprises a connecting piece, and the first terminal is connected and conducted with the second terminal through the connecting piece;

[0009] The first terminal connection module also includes a first row seat and a first push plate. The first row seat and the terminal seat are fixedly connected or integrally arranged. A first step hole is opened on the first row seat. The connecting member passes through the first step hole to the first side of the first row seat. The first push plate is located on the second side of the first row seat. The first push plate presses against the connecting member to fix the connecting member on the first row seat.

[0010] In a preferred embodiment, the connecting member includes a rod portion and a cap portion located on one end of the rod portion and having an increased outer diameter; the rod portion of the connecting member passes through the first step hole to the first side of the first row of seats, and the cap portion is located in the first step hole; a first guide groove is provided on the first row of seats, and the first push plate is inserted into the first guide groove and abuts against the cap portion to restrict the cap portion in the first step hole.

[0011] In a preferred embodiment, a first hole is formed on the first terminal, and the rod portion of the connector is inserted into the first hole to be connected to the first terminal; a second hole is formed on the second terminal, and the rod portion of the connector is inserted into the second hole to be connected to the second terminal; and the outer diameter of the cap portion is larger than the apertures of the first hole and the second hole.

[0012] In a more preferred embodiment, the first terminal includes opposite flat ends and a cylindrical section, the first hole is opened on the flat end, and the cylindrical end is a hollow cylindrical shape for connecting a cable.

[0013] In a further embodiment, the first row seat has a first limiting protrusion for limiting the flat end of the first terminal to prevent the first terminal from exceeding a predetermined position when being inserted.

[0014] In a preferred embodiment, the first terminal and the second terminal are locked on the connecting member by a locking member, and the first terminal and the second terminal are in contact with each other to be conductive or are conductive through the conductive connecting member.

[0015] In a preferred embodiment, a first clamping member is provided on the first push plate, and a first clamping hole is provided on the back side of the first row of seats; when the first push plate is pushed into place, the first clamping member is clamped into the first clamping hole; when disassembly or maintenance is required, the first clamping member can be detached from the first clamping hole under the action of external force, and the first clamping member has an inclined surface for facilitating detachment from the first clamping hole.

[0016] In a preferred embodiment, the first terminal connection module is fixed on the terminal base, and the electrical connector also includes a second terminal connection module, which is detachably arranged on the terminal base; the second terminal connection module includes the connecting piece, and the number of the first terminals and the second terminals is multiple, a part of the first terminals and a part of the second terminals are connected through the first terminal connection module, and another part of the first terminals and another part of the second terminals are connected through the second terminal connection module.

[0017] In a preferred embodiment, the second terminal connection module also includes a second row seat and a second push plate, the second row seat is movably arranged in the terminal seat, one or more second step holes are provided on the second row seat, the rod portion of the connecting member passes through the second step hole to the first side of the second row seat, and the cap portion is located in the second step hole; the second push plate is located on the second side of the second row seat, and a second guide groove is provided on the second row seat, the second push plate is inserted into the second guide groove and abuts against the cap portion to limit the cap portion in the second step hole.

[0018] In one embodiment, the electrical connector comprises:

[0019] A terminal seat, which is used to set a first terminal and a second terminal, wherein the first terminal and the second terminal are connected to each other;

[0020] A protective cover having an inner cavity, wherein the terminal seat is configured to be inserted into or removed from the inner cavity along a first direction;

[0021] A locking device, used to lock or unlock the protective cover and the terminal seat;

[0022] The locking device comprises a locking member movably inserted on the protective cover along the second direction, a part of the locking member is located in the inner cavity and has a first locking protrusion; the terminal seat has a second locking protrusion and an unlocking channel extending along the first direction, and the second locking protrusion and the unlocking channel are sequentially arranged along the second direction;

[0023] When the locking device is in a locked state, the first locking protrusion and the second locking protrusion abut against each other to prevent the terminal seat from detaching from the protective cover, and the terminal seat is locked in the protective cover; when the locking device is in an unlocked state, the first locking protrusion and the unlocking channel are aligned so as to be able to move in the unlocking channel along the first direction to allow the terminal seat to detach from the protective cover along the first direction.

[0024] In a preferred embodiment, the locking device comprises an unlocking member for moving the locking member along the second direction.

[0025] In a more preferred embodiment, the unlocking member has a rotating fitting portion that rotates with the protective cover, and the unlocking member has an unlocking portion and a pressing portion for operation, the unlocking portion and the pressing portion are respectively located on opposite sides of the rotating fitting portion, and the unlocking portion is connected to the locking member.

[0026] In a further preferred embodiment, a receiving groove is provided on the outer surface of the protective cover, the unlocking member is arranged in the receiving groove, and a socket is also provided on the protective cover to connect the receiving groove and the inner cavity, and the locking member is inserted into the inner cavity from the socket.

[0027] In a further preferred embodiment, the locking members are respectively provided on two opposite sides of the terminal seat, and the locking members on both sides are connected by a cross beam, the cross beam is located in the receiving groove, and the unlocking portion is connected to the cross beam.

[0028] In a further preferred embodiment, a notch is provided on the crossbeam, and the unlocking portion comprises a plug-in unit movably inserted into the notch.

[0029] In a further preferred embodiment, the locking device further comprises a cover plate disposed outside the receiving groove, the cover plate being connected to the protective cover, the cover plate having an operation hole for allowing the pressing part to be pressed, and the operation hole being arranged opposite to the pressing part. The unlocking member is restricted in the receiving groove by the cover plate, and is rotatably matched with the groove on the cover plate and the connecting rib on the protective cover, thereby avoiding the use of a pivot-like rotation connection method, and is more convenient to assemble.

[0030] In a further preferred embodiment, a connecting rib is provided in the receiving groove, and the rotating matching portion includes a groove matching with the connecting rib, and the connecting rib is located in the groove and allows the unlocking member to swing around the connecting rib.

[0031] In a preferred embodiment, the locking piece is located on the outside of the terminal seat, the first locking protrusion extends inward, and the second locking protrusion extends outward; the terminal seat has a locking groove for accommodating the locking piece, the locking groove extends along the second direction, and the unlocking channel is connected to the locking groove.

[0032] In a preferred embodiment, the inner surface of the protective cover is further provided with a limiting groove extending along the second direction, and a portion of the locking member is located in the limiting groove.

[0033] In a more preferred embodiment, the second locking protrusion has a first guiding slope, and the first guiding slope extends obliquely from the inside to the outside along the first direction to facilitate the first locking protrusion to cross the second locking protrusion and enter the locking groove when the terminal seat is inserted into the protective cover. The first guiding slope can facilitate the assembly of the protective cover on the terminal seat and ensure that it is assembled in place, reducing the resistance during the insertion process, specifically referring to the resistance of the second locking protrusion to the locking member.

[0034] In a more preferred embodiment, a second guiding slope is provided on the outer surface of the first locking protrusion and / or the terminal seat, and the second guiding slope is configured to guide the first locking protrusion and the second locking protrusion to align in the first direction when the terminal seat is inserted into the protective cover. The second guiding slope is conducive to the protective cover being covered on the terminal seat in the expected orientation, that is, automatically guiding the first locking protrusion and the second locking protrusion to face each other, and after the insertion is completed, the first locking protrusion is automatically in a position where the second locking protrusion is in close contact, and the protective cover is automatically locked after being assembled on the terminal seat, without the need for additional locking operations.

[0035] In a preferred embodiment, a sealing ring is provided between the outer surface of the terminal seat and the inner surface of the protective cover.

[0036] In a preferred embodiment, a first terminal connection module and a second terminal connection module are provided on the terminal seat, each of the terminal connection modules includes one or more connecting parts, each of the first terminals is connected and conducted with at least one of the second terminals via one of the connecting parts; at least the second terminal connection module is detachably provided on the terminal seat.

[0037] In a more preferred embodiment, the connecting member comprises a rod portion and a cap portion located on one end of the rod portion and having an increased outer diameter;

[0038] The first terminal connection module further comprises a first row seat and a first push plate, the first row seat and the terminal seat are fixedly connected or integrally arranged, one or more first step holes are provided on the first row seat, the rod portion of the connecting member passes through the first step hole to the first side of the first row seat, and the cap portion is located in the first step hole; the first push plate is located on the second side of the first row seat, a first guide groove is provided on the first row seat, the first push plate is inserted into the first guide groove and abuts against the cap portion to restrict the cap portion in the first step hole;

[0039] The second terminal connection module also includes a second row seat and a second push plate. The second row seat is movably arranged in the terminal seat. One or more second step holes are provided on the second row seat. The rod portion of the connecting member passes through the second step hole to the first side of the second row seat, and the cap portion is located in the second step hole; the second push plate is located on the second side of the second row seat. The second row seat is provided with a second guide groove. The second push plate is inserted into the second guide groove and abuts against the cap portion to limit the cap portion in the second step hole.

[0040] In a preferred embodiment, a sealing ring is provided between the second terminal connection module and the terminal seat.

[0041] In a preferred embodiment, a sealing ring is provided between the first terminal connection module and the first terminal, and a sealing ring is provided between the second terminal connection module and the first terminal.

[0042] The present invention also provides an electrical connector, which includes a terminal seat, on which a plurality of first terminals and a plurality of second terminals are arranged; the electrical connector also includes a first terminal connection module and a second terminal connection module, each of the terminal connection modules includes one or more connecting members, each of the first terminals is connected and conducted through one of the connecting members and at least one of the second terminals; the second terminal connection module is detachably arranged on the terminal seat.

[0043] In a preferred embodiment, the terminal seat includes a partition plate, and the space inside the terminal seat is divided into two front and rear parts by the partition plate. The second terminal connection module and the first terminal connection module are arranged front and back in the two parts, and the second terminal connection module can be movably inserted into the divided front part along the first direction.

[0044] In a more preferred embodiment, the second terminal connection module has an elastically deformable buckle, and the buckle can be detachably buckled in the buckling hole of the partition plate.

[0045] In a third aspect, the present invention provides an inverter, comprising a box body, the inverter also comprising the electrical connector, the electrical connector is arranged outside the box body, the first terminal is electrically connected to the components in the box body, and the second terminal is used to connect to a cable connected to a power grid or a load.

[0046] In a third aspect, an output side wiring method of an inverter is provided, wherein a power grid or a load is connected through the electrical connector; the output side wiring method comprises the following steps:

[0047] S1. Insert the first terminal connected to the components in the inverter box into the terminal seat. At this time, the terminal seat and the protective cover are in a detached state;

[0048] S2, inserting the second terminal into the terminal seat and connecting it to the first terminal, wherein the second terminal is connected to the cable connected to the protective cover;

[0049] S3, putting the protective cover on the terminal seat;

[0050] Wherein, before or after step S2, the terminal block is fixed on the box body of the inverter;

[0051] The output side wiring method also includes a maintenance step, which includes: moving the locking piece along the second direction to disengage the first locking protrusion from the second locking protrusion until it is aligned with the unlocking channel; pulling out the protective cover along the first direction, and the first locking protrusion slides along the unlocking channel to disengage from the terminal seat.

[0052] The present invention has the following advantages:

[0053] The electrical connector of the present invention is provided with a protective cover on the terminal seat, which can better place the terminal seat in a closed environment and provide a better waterproof and dustproof effect; at the same time, during the movement of the locking piece of the locking device along the second direction, the first locking protrusion or the second locking protrusion on the locking piece cooperates to prevent the terminal seat from detaching from the protective cover, or aligns with the unlocking channel and can move in the unlocking channel along the first direction to allow the terminal seat to detach from the protective cover along the first direction. The locking device can easily lock or unlock the protective cover and the terminal seat, and the connection between the protective cover and the terminal seat is relatively convenient. In particular, the protective cover is easy to disassemble, ensuring convenient wiring, making disassembly and maintenance relatively convenient, which is conducive to installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0055] Figure 1 The figure is an exploded schematic diagram of an electrical connector according to an embodiment of the present invention.

[0056] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0057] Figure 3 The figure is a three-dimensional diagram of a protective cover at a certain viewing angle according to an embodiment of the present invention.

[0058] Figure 4 It is a stereoscopic view of a protective cover according to an embodiment of the present invention at another viewing angle.

[0059] Figure 5 It is a stereoscopic view of a locking member and a crossbeam at a certain viewing angle according to an embodiment of the present invention.

[0060] Figure 6 It is a stereoscopic view of a locking member and a crossbeam according to an embodiment of the present invention at another viewing angle.

[0061] Figure 7 The figure is a three-dimensional diagram of an unlocking member according to an embodiment of the present invention.

[0062] Figure 8 The figure is a three-dimensional diagram of a cover plate according to an embodiment of the present invention.

[0063] Fig. 9 It is a three-dimensional diagram of a terminal block according to an embodiment of the present invention, wherein a first terminal and a second terminal are connected to the terminal block.

[0064] Fig.10 for Fig. 9 A partial enlarged view of point B in the middle.

[0065] Fig.11 for Fig. 9 A perspective view of the terminal block shown from another perspective.

[0066] Fig.12 It is a three-dimensional view of a terminal block according to an embodiment of the present invention, wherein the first terminal and the second terminal are not connected to the terminal block.

[0067] Fig.13 for Fig.12 The terminal block shown is a three-dimensional view from another perspective.

[0068] Fig.14 for Fig.12 The terminal block shown is a stereoscopic view from another viewing angle.

[0069] Fig.15 FIG. 4 is a three-dimensional diagram of a second terminal connection module according to an embodiment of the present invention.

[0070] Fig.16 for Fig.15 The second terminal connection module is shown in a three-dimensional view from another perspective.

[0071] Fig.17 It is a stereoscopic diagram of a first push plate according to an embodiment of the present invention.

[0072] Fig.18 for Fig.17 A stereoscopic view of the second push plate from another viewing angle.

[0073] Fig.191 is a structural diagram of a terminal block after wiring is completed according to an embodiment of the present invention.

[0074] Fig. 20 for Fig.19 Sectional view along CC direction.

[0075] in,

[0076] 1. Terminal seat; 101. Second locking protrusion; 102. First guiding slope; 103. Unlocking channel; 104. Second guiding slope; 105. Locking groove; 106. Partition plate; 106a. Card hole; 106b. Insertion space; 107. Mounting flange; 108. Sealing ring groove;

[0077] 11. first terminal connection module; 111. first row seat; 112. first limiting protrusion; 113. first step hole; 114. first guide groove; 115. first card slot; 116. first push plate;

[0078] 12. second terminal connection module; 121. second row seat; 122. second limiting protrusion; 123. second step hole; 124. second guide groove; 125. buckle; 126. second push plate; 127. second clamping member; 128. second clamping hole;

[0079] 13. first terminal; 131. first hole; 131. flat end; 132. cylindrical end;

[0080] 14. second terminal; 141. second hole;

[0081] 15. Connector; 151. Rod; 152. Cap; 153. Washer; 154. Nut;

[0082] 2. Protective cover; 21. Receiving groove; 211. Connecting rib; 22. Jack; 23. Cable connector; 24. Limiting groove;

[0083] 3. Locking device; 31. Locking member; 311. First locking protrusion; 312. Second guiding slope; 32. Crossbeam; 321. Notch; 33. Unlocking member; 330. Groove; 331. Unlocking part; 331a. Plug-in; 332. Pressing part; 34. Cover plate; 341. Operating hole;

[0084] 4. Sealing ring. DETAILED DESCRIPTION

[0085] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0086] In this document, the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0087] Figures 1 to 20 The drawings are drawn in true proportion. To keep the specification concise, the proportions of each component are not listed one by one. However, the proportions and positions of each component should be regarded as part of the content of this specification.

[0088] The present embodiment provides an electrical connector for transmitting power in an electric device, such as in an energy storage system. The present embodiment typically provides an inverter using the electrical connector, and the electrical connector is used to transmit the AC power output by the inverter module of the inverter to the power grid, or to the load. In a specific example, the electrical connector is used to connect to the power grid and is used as an off-grid connector for a photovoltaic energy storage inverter.

[0089] Reference Figures 1 to 20 As shown, the electrical connector mainly comprises a terminal base 1, a protective cover 2 and a locking device 3. The structure of each component is described in detail below.

[0090] The terminal seat 1 is a hollow component with two open ends. The terminal seat 1 includes four side plates, which are connected to form the outer wall of the terminal seat 1. The terminal seat 1 is integrally formed of insulating material and can be an injection-molded plastic part. Figure 12 to Figure 14 As shown, for ease of understanding and description, the upper and lower ends of the terminal block 1 are defined to be open. The open upper and lower ends can facilitate the assembly of the first terminal 13 and the second terminal 14. The terminal block 1 is used to set the first terminal 13 and the second terminal 14, and the first terminal 13 and the second terminal 14 are connected to each other and conductive after being installed on the terminal block 1. The first terminal 13 and the second terminal 14 are respectively connected to two different power devices and / or power systems through cables or other power transmission elements. For example, in a specific example, the first terminal 13 is electrically connected to the components in the inverter (such as the output end of the inverter circuit) to output the alternating current generated by the inverter; the second terminal 14 is connected to the power grid or the energy storage cabinet through a cable; then, under this working condition, the above-mentioned electrical connector can realize the on-grid and off-grid operation of the inverter, connecting or disconnecting the inverter and the power grid.

[0091] The protective cover 2 has an inner cavity, and its shape generally matches that of the terminal seat 1, so that the terminal seat 1 can be inserted into or out of the inner cavity along the first direction. The protective cover 2 also includes four side panels, and the four side panels enclose the above-mentioned inner cavity. The protective cover 2 is integrally formed of an insulating material, and can be an injection-molded plastic part. The upper end of the protective cover 2 is open, and the terminal seat 1 can enter and exit the inner cavity of the protective cover 2 from the open upper end. In this embodiment, the above-mentioned first direction is specifically the up and down direction. A threading hole is provided at the lower end of the protective cover 2, and a cable connector 23 is provided on the threading hole. The cable electrically connected to the second terminal 14 is inserted into the protective cover 2 through the threading hole and fixed to the protective cover 2 through the cable connector 23, thereby reducing the pulling on the second terminal 14 along the up and down directions.

[0092] A receiving groove 21 is provided on the outer surface of the protective cover 2, and one or more plug holes 22 are also provided on the protective cover 2 to connect the receiving groove 21 with the inner cavity. Figure 3 and Figure 4 As shown, the receiving groove 21 is specifically arranged on the front side plate of the protective cover 2, and a plug hole 22 is respectively arranged on the left and right sides of the front side plate, and the plug hole 22 passes through the front side plate from the receiving groove 21 and extends into the protective cover 2. Furthermore, the inner surface of the protective cover 2 is also provided with a limiting groove 24 extending along the second direction. Figure 4 As shown, the left and right side plates of the protective cover 2 are provided with limiting grooves 24, which are directly opposite to the insertion hole 22, and the two are preferably at the same height and connected to each other.

[0093] The locking device 3 is used to lock or unlock the protective cover 2 and the terminal base 1, and the locking device 3 is arranged on the terminal base 1 and / or the protective cover 2. Specifically, the locking device 3 includes a locking member 31 that can be inserted on the protective cover 2 movably along a second direction, and the second direction is not parallel to the first direction; in the specific example shown in the drawings, the second direction is the front-to-back direction, which is perpendicular to the first direction. Figure 5 and Figure 6 , a portion of the locking member 31 is located in the inner cavity and has a first locking protrusion 311. Figure 2 The terminal block 1 has a second locking protrusion 101 and an unlocking channel 103 extending along the first direction, and the second locking protrusion 101 and the unlocking channel 103 are arranged in sequence along the second direction. That is, the second locking protrusion 101 and the unlocking channel 103 are arranged alternately, and when the locking member 31 moves along the second direction, the first locking protrusion 311 on the locking member 31 either abuts against and cooperates with the second locking protrusion 101, or aligns with the unlocking channel 103 and can slide into the unlocking channel 103. Furthermore, when the locking device 3 is in the locked state, as Fig.10As shown, the first locking protrusion 311 and the second locking protrusion 101 abut against each other to prevent the terminal block 1 from being separated from the protective cover 2, and the terminal block 1 is locked in the protective cover 2. When the locking device 3 is in the unlocked state, the first locking protrusion 311 is aligned with the unlocking channel 103 so as to be able to move in the unlocking channel 103 along the first direction to allow the terminal block 1 to be separated from the protective cover 2 along the first direction.

[0094] The locking member 31 is located on the outside of the terminal block 1, the first locking protrusion 311 extends inward, the second locking protrusion 101 extends outward relative to the unlocking channel 103, and a locking groove 105 is provided on the terminal block 1. The locking groove 105 is located above the second locking protrusion 101 and the unlocking channel 103, and the unlocking channel 103 is connected to the locking groove 105. When the locking device 3 is in the locked state, the first locking protrusion 311 is located in the locking groove 105 and is located directly above the second locking protrusion 101. It is blocked by the second locking protrusion 101, and the terminal block 1 cannot move in the first direction, that is, the terminal block 1 cannot be pulled out of the protective cover 2. During the process of the locking device 3 being converted from the locked state to the unlocked state, the first locking protrusion 311 slides in the locking groove 105, gradually disengages from the second locking protrusion 101 and is located above the unlocking channel 103. At this time, the terminal block 1 or the protective cover 2 is moved along the first direction, and the first locking protrusion 311 slides from the locking groove 105 into the unlocking channel 103 and moves along the unlocking channel 103, thereby allowing the terminal block 1 to move relative to the protective cover 2 along the first direction until the terminal block 1 is completely separated from the protective cover 2.

[0095] The second locking protrusion 101 has a first guiding bevel 102, and the first guiding bevel 102 extends obliquely from the inside to the outside along the first direction so as to facilitate the first locking protrusion 311 to cross over the second locking protrusion 101 and enter the locking groove 105 when the terminal block 1 is inserted into the protective cover 2. Specifically, in the example shown in the accompanying drawings, the first guiding bevel 102 gradually tilts outward from bottom to top. In the process of inserting the terminal block 1 into the protective cover 2, the first locking protrusion 311, under the action of the first guiding bevel 102, crosses over the second locking protrusion 101 from bottom to top relative to the protective cover 2 and moves to a position at the same height as the locking groove 105. During the movement, the locking piece 31 is slightly deformed outward, and after crossing over the second locking protrusion 101, it enters the locking groove 105 under the action of its own reset force. Figure 2 , Fig. 9 and Fig.10 As shown, the first guiding slope 102 located on the left side of the terminal base 1 gradually tilts to the left from bottom to top, and the first guiding slope 102 located on the right side of the terminal base 1 gradually tilts to the right from bottom to top.

[0096] A second guiding slope is provided on the outer surface of the first locking protrusion 311 and / or the terminal block 1, and the second guiding slope is configured to guide the first locking protrusion 311 and the second locking protrusion 101 to align in the first direction when the terminal block 1 is inserted into the protective cover 2. Specifically, in the example shown in the drawings, the first locking protrusion 311 has a second guiding slope 312, such as Figure 5 As shown, the second guiding bevel 312 gradually tilts backward from bottom to top. Correspondingly, the outer surface of the terminal block 1 is also provided with a second guiding bevel 104, and the second guiding bevel 312 and the second guiding bevel 104 cooperate with each other; during the process of the terminal block 1 being inserted into the protective cover 2, the second guiding bevel 312 and the second guiding bevel 104 contact and cooperate with each other to guide the terminal block 1 to be inserted into the protective cover 2 in a manner that the second locking protrusion 101 faces the first locking protrusion 311. Further, the second guiding bevel 104 on the terminal block 1 is located directly below the unlocking channel 103.

[0097] like Figure 5 and 6 As shown, the number of locking members 31 is at least two, and locking members 31 are respectively provided on opposite sides of the terminal block 1, and the locking members 31 on both sides are connected by a crossbeam 32, and the crossbeam 32 is located in the receiving groove 21. Specifically, in the example shown in the accompanying drawings, the two locking members 31 are respectively located on the left and right sides of the terminal block 1, and the whole constitutes an integrated semi-frame-shaped or C-shaped component, and the locking member 31 is elastic and can be elastically deformed outward and reset. The crossbeam 32 extends in the left and right directions and is movably arranged in the receiving groove 21 along the second direction. The outer end of the locking member 31 is fixed to the left end or the right end of the crossbeam 32, and the inner end of the locking member 31 passes through the jack 22 in the receiving groove 21 and enters the inner cavity. Among them, a part of the locking member 31 is located in the limiting groove 24 of the protective cover 2; further, a locking groove 105 is provided on the outer surface of the terminal block 1, and the locking groove 105 extends along the second direction. When the locking device 3 is in the locked state, at least the first locking protrusion 311 of the locking member 31 can be located in the locking groove 105. The moving path of the locking member 31 is defined by the limiting groove 24 and the locking groove 105 , that is, the locking member 31 moves along the second direction. The locking groove 105 is specifically provided on the left side surface or the right side surface of the terminal block 1 .

[0098] The locking device 3 also includes an unlocking member 33 for moving the locking member 31 along the second direction. The unlocking member 33 has a rotational matching portion that is rotationally matched with the protective cover 2. The unlocking member 33 has an unlocking portion 331 and a pressing portion 332 for operation. The unlocking member 331 and the pressing portion 332 are located on opposite sides of the rotational matching portion, thereby forming a structure similar to a seesaw or a lever. The unlocking portion 331 is connected to the locking member 31, specifically, connected to the locking member 31 through the crossbeam 32. Further, a notch 321 is provided on the crossbeam 32, and the unlocking portion 331 includes a plug-in 331a that is movably inserted into the notch 321; the plug-in 331a is inserted into the notch 321 of the crossbeam 32. After pressing the pressing portion 332, the unlocking portion 331 tilts outward, driving the crossbeam 32 to move outward, and the locking member 31 connected to the crossbeam 32 moves outward along the second direction.

[0099] The crossbeam 32 and the unlocking member 33 are both arranged in the receiving groove 21 on the outer surface of the protective cover 2. The locking device 3 also includes a cover plate 34 that is arranged outside the receiving groove 21, and the cover plate 34 is connected to the protective cover 2. For example, the cover plate 34 is clamped on the protective cover 2 through a plurality of buckles. The cover plate 34 has an operation hole 341 that allows the pressing portion 332 to be pressed, and the operation hole 341 is arranged opposite to the pressing portion 332. The locking device 3 can be unlocked by passing a slender member (such as a pin or nail, etc.) through the operation hole 341 and pressing the unlocking member 33 inward.

[0100] Optionally, a connecting rib 211 is provided in the receiving groove 21, and the length direction of the connecting rib 211 is perpendicular to the first direction and the second direction, and preferably extends in the left-right direction. The rotational matching portion is specifically a groove 330 matched with the connecting rib 211, and the connecting rib 211 is located in the groove 330 and allows the unlocking member 33 to swing around the connecting rib 211 to form a structure similar to a seesaw or a lever. The unlocking member 33 is restricted in the receiving groove 21 by the cover plate 34, and the groove 330 thereon and the connecting rib 211 on the protective cover 2 are rotated to cooperate, avoiding the use of a pivot-like rotation connection method, and the assembly is more convenient.

[0101] A sealing ring 4 is provided between the outer surface of the terminal base 1 and the inner surface of the protective cover 2. Fig. 9 and Fig. 20 As shown, a sealing ring groove 108 is provided on the outer surface of the terminal block 1, and the sealing ring is arranged in the sealing ring groove 108; when the terminal block 1 is inserted into the protective cover 2, the sealing ring is squeezed between the protective cover 2 and the terminal block 1 and is in a compressed state, thereby sealing the two and obtaining a better waterproof and dustproof effect. Fig. 20 As shown, a sealing ring 4 is arranged between the outer surface of the second terminal connection module 12 and the inner wall of the insertion space 106b of the terminal seat 1 to provide a better sealing effect. Fig. 20As shown, a sealing ring 4 is provided between the inner surface of the terminal installation groove of the first terminal connection module 11 and the first terminal 13 , and a sealing ring 4 is provided between the inner surface of the terminal installation groove of the second terminal connection module 12 and the first terminal 13 to provide a better sealing effect.

[0102] Combination Figure 1 , Figures 11 to 20 As shown, a first terminal connection module 11 and a second terminal connection module 12 are arranged in the terminal block 1. Each terminal connection module includes one or more connectors 15, and each first terminal 13 is connected and conducted with at least one second terminal 14 through a connector 15; the second terminal connection module 12 is detachably arranged on the terminal block 1. It should be noted that: although in the example shown in the accompanying drawings, the number of the first terminal connection module 11 and the second terminal connection module 12 is one each; in some other embodiments, the number of the first terminal connection module 11 can be multiple, and the number of the second terminal connection module 12 can be multiple; this application does not limit this. Each terminal connection module is provided with N connectors 15 to connect N first terminals 13 and N second terminals 14 correspondingly, and N is a positive integer. In the specific example shown in the accompanying drawings, N=5, corresponding to the live wire, neutral wire, N wire, ground wire, etc. connected to the power grid, and at least one redundant wire is used as a backup.

[0103] The terminal block 1 also includes a partition plate 106, and the space in the terminal block 1 is divided into two parts, front and back, by the partition plate 106, and the second terminal connection module 12 and the first terminal connection module 11 are arranged in the front and back of these two parts. Among them, the separated front part serves as the plug-in space 106b of the second terminal connection module 12, and the second terminal connection module 12 can be inserted into the plug-in space 106b or detached from the plug-in space 106b movably along the first direction. Furthermore, a snap-in hole 106a is provided on the partition plate 106, and the second terminal connection module 12 has an elastically deformable snap-in 125, and the snap-in 125 can be snap-in detachably in the snap-in hole 106a of the partition plate 106.

[0104] like Figure 1 and Fig. 20 As shown, the first terminal 13 is provided with a first hole 131, and the connector 15 can be inserted into the first hole 131 to be connected to the first terminal 13. The second terminal 14 is provided with a second hole 141, and the connector 15 can be inserted into the second hole 141 to be connected to the second terminal 14. The connector 15 includes a rod 151 and a cap 152 with an increased outer diameter located at one end of the rod 151. The rod 151 can be inserted into the first hole 131 and the second hole 141, and the outer diameter of the cap 152 is preferably greater than the aperture of the first hole 131 and the second hole 141. In a specific example, the connector 15 is a nut.

[0105] The first terminal connection module 11 is fixed in the terminal seat 1. The first terminal connection module 11 also includes a first row seat 111 and a first push plate 116. The first row seat 111 is fixedly connected or integrally arranged with the terminal seat 1. One or more first step holes 113 are provided on the first row seat 111. The rod portion 151 of the connecting member 15 passes through the first step hole 113 to the first side of the first row seat 111, and the cap portion 152 is located in the first step hole 113. The first push plate 116 is located on the second side of the first row seat 111. The first row seat 111 is provided with a first guide groove 114 and a first clamping groove 115. The first push plate 116 is inserted into the first guide groove 114 and the first clamping groove 115 and abuts against the cap portion 152 to limit the cap portion 152 in the first step hole 113. Specifically, in the example shown in the drawings, a plurality of first step holes 113 are arranged in parallel along the left-right direction on the first row seat 111. The shape of the front portion of the first step hole 113 corresponds to the rod portion 151 of the connecting member 15, for example, a round hole; the shape of the rear portion of the first step hole 113 corresponds to the cap portion 152 of the connecting member 15, for example, a hexagonal hole. The connecting member 15 is inserted into the first step hole 113 from the rear side to the front side, and its rod portion 151 passes through the front side of the first row seat 111; the first guide groove 114 extends in the up-down direction, and the first push plate 116 is inserted into the first guide groove 114 from bottom to top and is clamped into the first clamping groove 115. The first push plate 116 is restricted by the first guide groove 114 and the first clamping groove 115 at the rear side of the first row seat 111, and presses against the cap portion 152 of the connecting member 15 from the rear, thereby fixing the connecting member 15 on the first row seat 111.

[0106] The second terminal connection module 12 can be detachably installed in the terminal seat 1. The second terminal connection module 12 also includes a second row seat 121 and a second push plate 126. The second row seat 121 is detachably arranged in the terminal seat 1, and can be specifically inserted into or pulled out of the terminal seat 1 in a movable manner along the first direction. One or more second step holes 123 are provided on the second row seat 121, and the rod portion 151 of the connecting member 15 passes through the second step hole 123 to the first side of the second row seat 121, and the cap portion 152 is located in the second step hole 123. The second push plate 126 is located on the second side of the second row seat 121, and the second row seat 121 is provided with a second guide groove 124. The second push plate 126 is inserted into the second guide groove 124 and abuts against the cap portion 152 to limit the cap portion 152 in the second step hole 123. Specifically, in the example shown in the drawings, a plurality of second step holes 123 are arranged in parallel along the left-right direction on the second row seat 121. The shape of the front part of the second step hole 123 corresponds to the rod part 151 of the connecting member 15, for example, a round hole; the shape of the rear part of the second step hole 123 corresponds to the cap part 152 of the connecting member 15, for example, a hexagonal hole. The connecting member 15 is inserted into the second step hole 123 from the rear side to the front side, and its rod part 151 passes through the front side of the second row seat 121; the second guide groove 124 extends in the up-down direction, and the second push plate 126 is inserted into the second guide groove 124 from the bottom to the top. The second push plate 126 is restricted by the second guide groove 124 to the rear side of the second row seat 121, and presses against the cap part 152 of the connecting member 15 from the rear, thereby fixing the connecting member 15 on the second row seat 121.

[0107] Further, a second clamping member 127 is provided on the second push plate 126, and a second clamping hole 128 is provided on the back of the second row seat 121. When the second push plate 126 is pushed upward to a position, the second clamping member 127 is clamped into the second clamping hole 128. When disassembly or maintenance is required, the second clamping member 127 can be separated from the second clamping hole 128 under the action of an external force, and the second clamping member 127 has an inclined surface that is convenient for disengaging from the second clamping hole 128. The structure of the first push plate is similar to that of the second push plate 126. Further, a first clamping member is provided on the first push plate 116, and a first clamping hole 117 is provided on the back of the first row seat 111. When the first push plate 116 is pushed upward to a position, the first clamping member is clamped into the first clamping hole 117. When disassembly or maintenance is required, the first clamping member can be separated from the first clamping hole 117 under the action of an external force, and the first clamping member has an inclined surface that is convenient for disengaging from the first clamping hole 117.

[0108] like Fig. 20As shown, the first terminal 13 includes opposite flat ends 132 and a cylindrical end 133, and the first hole 131 is opened on the flat end 132. The cylindrical end 133 is a hollow cylindrical shape for connecting cables. The structure of the second terminal 14 is similar to that of the first terminal 13, and also has a flat end and a cylindrical end, which will not be described here. The first row seat 111 has a first limiting protrusion 112, which is used to limit the flat end 132 of the first terminal 13 to prevent it from exceeding the predetermined position when inserted along the first direction. As shown in the accompanying drawings, the first limiting protrusion 112 is located below the first terminal 13. The second row seat 121 has a second limiting protrusion 122, which is used to limit the flat end 132 of the first terminal 13 to prevent it from exceeding the predetermined position when inserted along the first direction. As shown in the accompanying drawings, the second limiting protrusion 122 is located below the first terminal 13.

[0109] like Fig. 20 As shown, the upper end of the terminal block 1 has a mounting flange 107 to facilitate installation on the housing of the power equipment, such as installation on the box of the inverter.

[0110] The assembly and use method of the electrical connector includes the following steps: (1) terminal assembly; (2) connecting the protective cover 2; and (3) maintenance.

[0111] Terminal assembly:

[0112] (1) Installing the first terminal 13 on the terminal block 1, including: inserting the first terminal 13 into the first terminal connection module 11 along the first direction, with the flat end 132 thereof stacked on the first row seat 111, and being limited by the first limiting protrusion 112 so that the first hole 131 and the first step hole 113 are aligned;

[0113] It also includes: before the second row seat 121 is inserted into the terminal seat 1, the first terminal 13 is inserted into the second terminal connection module 12 along the first direction, and its flat end 132 is stacked on the second row seat 121, and is limited by the second limiting protrusion 122 to align the first hole 131 and the second step hole 123.

[0114] (2) Installing the connector 15 onto the first terminal connection module 11, including: inserting the connector 15 into the first step hole 113 of the first row seat 111 and passing through the first hole 131 of the first terminal 13, sliding the first push plate 116 into the back of the first row seat 111 and engaging with each other to abut the cap portion 152 of the connector 15, so that the connector 15 is fixed in the first row seat 111.

[0115] Installing the connector 15 on the first terminal connection module 11 includes: inserting the connector 15 into the second step hole 123 of the second row seat 121 and passing through the first hole 131 of the first terminal 13, sliding the second push plate 126 into the back of the second row seat 121 and engaging with each other to abut the cap 152 of the connector 15, so that the connector 15 is fixed in the second row seat 121. After that, insert the second connection module into the terminal seat 1 along the first direction and engage and fix it.

[0116] (3) Connecting the second terminal 14 to the connector 15 includes: sleeve the second terminal 14 on the rod 151 of the connector 15, pass the rod 151 through the second hole 141, and lock the second terminal 14 and the first terminal 13 on the connector 15 by means of a locking member such as a gasket 153 and a nut 154, as shown in FIG. Fig. 20 As shown, the first terminal 13 and the second terminal 14 are in contact with each other to be conductive or are conductively connected to each other through a conductive connecting member 15 .

[0117] Before or after process (3), the terminal block 1 is fixed to the electrical equipment or other objects.

[0118] Connecting protection cover 2:

[0119] The protective cover 2 is put on the terminal block 1 along the first direction. During the insertion process, the first locking protrusion 311 of the locking member 31 automatically enters the locking groove 105 across the second locking protrusion 101, and the first locking protrusion 311 and the second locking protrusion 101 are tightly matched to lock the protective cover 2 and the terminal block 1 to each other.

[0120] repair:

[0121] Unlock the locking device 3 and remove the protective cover 2 from the terminal block 1. Specifically, press the pressing portion 332 of the unlocking member 33 inward (for example, press a slender member through the operating hole 341 of the cover body), so that the locking member 31 slides outward in the locking groove 105 along the second direction until the first locking protrusion 311 faces the unlocking channel 103. At this time, pull the protective cover along the first direction, the first locking protrusion 311 slides in the unlocking channel 103, and the first locking protrusion 311 is separated from the locking groove 105. The protective cover 2 and the terminal block 1 are mutually unlocked and separated, and the terminal block 1 is exposed, so that the terminals on it can be replaced and maintained.

[0122] An inverter of this embodiment includes a box and the above-mentioned electrical connector, which is arranged outside the box, the first terminal 13 is electrically connected to the components in the box, and the second terminal 14 is connected to the cable connected to the power grid or the load.

[0123] This embodiment also provides an output side wiring method of an inverter, which is connected to a power grid or a load through the above-mentioned electrical connector. The output side wiring method includes the following steps:

[0124] S1, inserting the first terminal 13 connected to the components in the inverter box into the terminal block 1, at which time the terminal block 1 and the protective cover 2 are in a detached state;

[0125] S2, inserting the second terminal 14 into the terminal block 1 and connecting it to the first terminal 13, wherein the second terminal 14 is connected to the cable connected to the protective cover 2;

[0126] S3, put the protective cover 2 on the terminal block 1;

[0127] Before or after step S2, the terminal block 1 is fixed to the box of the inverter. Specifically, the mounting flange 107 of the terminal block 1 is locked to the box of the inverter by fasteners.

[0128] The output side wiring method also includes a maintenance step, which includes: moving the locking piece 31 along the second direction to disengage the first locking protrusion 311 from the second locking protrusion 101 until it is aligned with the unlocking channel 103; pulling out the protective cover 2 along the first direction, and the first locking protrusion 311 slides along the unlocking channel 103 to disengage from the terminal seat 1.

[0129] The protective cover 2 of this embodiment is detachable and easy to operate; the terminal connection is convenient, and there is no need to hold the connector 15 all the time; a large number of terminals can be set, while ensuring that the terminal wiring is convenient, and maintenance and replacement are relatively convenient.

[0130] As shown in this specification and claims, the terms "comprises" and "include" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements. The term "and / or" as used herein includes any combination of one or more of the relevant listed items.

[0131] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0132] The above embodiment is only for illustrating the technical concept and features of the present invention, and is a preferred embodiment. Its purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrical connector, comprising a terminal block and a first terminal connection module arranged on the terminal block, wherein the terminal block is provided with a first terminal and a second terminal; characterized in that: The first terminal connection module includes a connection piece, and the first terminal is connected and conducted with the second terminal through the connection piece; The first terminal connection module also includes a first row seat and a first push plate. The first row seat and the terminal seat are fixedly connected or integrally arranged. A first step hole is opened on the first row seat. The connecting member passes through the first step hole to the first side of the first row seat. The first push plate is located on the second side of the first row seat. The first push plate presses against the connecting member to fix the connecting member on the first row seat.

2. The electrical connector according to claim 1, characterized in that: The connecting member includes a rod portion and a cap portion with an increased outer diameter located on one end of the rod portion; the rod portion of the connecting member passes through the first step hole to the first side of the first row of seats, and the cap portion is located in the first step hole; a first guide groove is provided on the first row of seats, and the first push plate is inserted into the first guide groove and abuts against the cap portion to restrict the cap portion in the first step hole.

3. The electrical connector according to claim 2, characterized in that: A first hole is formed on the first terminal, and the rod of the connector is inserted into the first hole to be connected to the first terminal; a second hole is formed on the second terminal, and the rod of the connector is inserted into the second hole to be connected to the second terminal; the outer diameter of the cap is larger than the apertures of the first hole and the second hole.

4. The electrical connector according to claim 2, characterized in that: A first clamping member is provided on the first push plate, and a first clamping hole is provided on the back side of the first row of seats; when the first push plate is pushed into place, the first clamping member is clamped into the first clamping hole; when disassembly or maintenance is required, the first clamping member can be detached from the first clamping hole under the action of external force, and the first clamping member has an inclined surface for facilitating detachment from the first clamping hole.

5. The electrical connector according to claim 1, characterized in that: The first row of seats has a first limiting protrusion for limiting the first terminal to prevent the first terminal from exceeding a predetermined position when being inserted.

6. The electrical connector according to claim 1, characterized in that: The first terminal and the second terminal are locked on the connecting member through a locking member, and the first terminal and the second terminal are in contact with each other to be conductive or are conductive through the conductive connecting member.

7. The electrical connector according to any one of claims 1 to 6, characterized in that: The first terminal connection module is fixed on the terminal base, and the electrical connector also includes a second terminal connection module, which is detachably arranged on the terminal base; the second terminal connection module includes the connecting piece, and the number of the first terminals and the second terminals is multiple, a part of the first terminals and a part of the second terminals are connected through the first terminal connection module, and another part of the first terminals and another part of the second terminals are connected through the second terminal connection module.

8. The electrical connector according to claim 7, characterized in that: The second terminal connection module also includes a second row seat and a second push plate. The second row seat is movably arranged in the terminal seat. One or more second step holes are provided on the second row seat. The connecting member passes through the second step hole to the first side of the second row seat. The second push plate is located on the second side of the second row seat. The second row seat is provided with a second guide groove. The second push plate is inserted into the second guide groove and presses against the connecting member to fix the connecting member on the second row seat.

9. An electrical connector, comprising a terminal block, on which a plurality of first terminals and a plurality of second terminals are arranged; characterized in that: The electrical connector also includes a first terminal connection module and a second terminal connection module, each of the terminal connection modules includes one or more connecting members, each of the first terminals is connected and conducted with at least one of the second terminals via one of the connecting members; the second terminal connection module is detachably disposed on the terminal seat.

10. The electrical connector according to claim 9, characterized in that: The terminal seat includes a partition plate, and the space inside the terminal seat is divided into two front and rear parts by the partition plate. The second terminal connection module and the first terminal connection module are arranged in the two parts front and back, and the second terminal connection module can be movably inserted into the divided front side part along the first direction.

11. The electrical connector according to claim 10, characterized in that: The partition plate is provided with a snap-fitting hole, and the second terminal connection module has an elastically deformable snap-fitting, and the snap-fitting is detachably snap-fitted into the snap-fitting hole of the partition plate.

12. An inverter, comprising a box, characterized in that: The inverter also includes an electrical connector as described in any one of claims 1 to 11, wherein the electrical connector is arranged outside the box, the first terminal is electrically connected to the components in the box, and the second terminal is used to connect to a cable connected to a power grid or a load.

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