Battery rack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery rack which comprises a rack and a wire binding piece, the rack is used for bearing a battery pack, the wire binding piece is detachably connected to the rack, the wire binding piece comprises a base and at least two wire binding rods, the base is connected with the rack, all the wire binding rods are arranged on the base at intervals in the first direction, and the wire binding rods are detachably connected with the rack. The wire binding rod extends along a second direction and is used for connecting a connecting wire of the battery pack, and an included angle is formed between the first direction and the second direction. According to the battery rack disclosed by the utility model, the wire binding piece with the wire binding rod is arranged on the battery rack, so that the connecting wires of each battery pack can be connected to the wire binding rod and are arranged along the length direction of the wire binding rod, and the connecting wires are arranged in order and are convenient to maintain in the later period and find; by arranging the multiple wire binding rods at intervals, different connecting wires can be connected to different wire binding rods at intervals, and interference between the different connecting wires is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery rack. Background Art

[0002] In recent years, with the increasing demand for energy by people, various new energies such as wind energy and solar energy have gradually increased. However, the generation and use of these energies are often separated in time and space, and the energy storage battery system is the key to solving this problem.

[0003] At present, the main form of the energy storage battery system is composed of a battery rack and a plurality of battery packs arranged on the battery rack. The prior art has the following defects: a plurality of battery packs are arranged on the battery rack, and each battery pack includes a plurality of connecting lines for summarization or connection to external electrical appliances. The lack of fixation of the connecting lines to the battery rack results in a chaotic circuit layout, which is likely to cause interference between high-voltage and low-voltage connecting lines, and it is difficult to find when individual battery pack lines are damaged later, and the maintenance efficiency is low. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery rack, which has a simple structure, and its wire tying member can connect the connecting lines of the battery pack, so that the connecting line layout is orderly and the later maintenance is convenient.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] Provide a battery rack, including a rack and a wire tying member. The rack is used to support the battery pack, the wire tying member is detachably connected to the rack. The wire tying member includes a base and at least two wire tying rods. The base is connected to the rack. All the wire tying rods are arranged on the base at intervals along a first direction, and the wire tying rods extend along a second direction. The wire tying rods are used to connect the connecting lines of the battery pack, and the first direction and the second direction are arranged at an angle.

[0007] As a preferred scheme of the battery rack, one base is respectively arranged at both ends of the wire tying rod along the second direction, and the wire tying rod is detachably connected to the base.

[0008] As a preferred scheme of the battery rack, the base includes a main body part, a clamping part and a limiting part. At least three clamping parts are arranged on the main body part at intervals along the first direction. A clamping groove is formed between adjacent two clamping parts at intervals. The wire tying rod is clamped in the clamping groove. The limiting part is protruded from at least one side of two adjacent sides of the adjacent two clamping parts close to each other. The limiting part is used to block the wire tying rod from disengaging from the clamping groove.

[0009] As a preferred solution of the battery rack, the base further includes a positioning portion, the bottom of the snap-in slot is protrudingly provided with the positioning portion, the outer periphery of the wire binding rod is recessed with a positioning hole, and the positioning portion is inserted into the positioning hole.

[0010] As a preferred solution for the battery rack, the positioning hole includes a guide hole and a connecting hole. The guide hole is recessed on the outer periphery of the wire binding rod. The diameter of the guide hole gradually decreases along the depth direction of the guide hole. The connecting hole is provided at the bottom of the guide hole, and the positioning portion is inserted into the connecting hole.

[0011] As a preferred solution of the battery rack, the battery rack also includes a support plate and a surrounding plate detachably connected to the rack, a plurality of the support plates are arranged on the rack at intervals in the vertical direction, and a plurality of the surrounding plates are arranged on the periphery of each of the support plates, and all the surrounding plates on the periphery of each of the support plates are combined to form an installation groove for limiting the position of the battery pack.

[0012] As a preferred solution of the battery rack, the enclosure includes a fixing portion and a stopping portion, the fixing portion is detachably connected to the rack, the fixing portion is protruding toward one side of the battery pack and is provided with the stopping portion, and the stopping portion is used to prevent the battery pack from being separated from the mounting slot; and / or,

[0013] A liquid cooling channel is arranged in the support plate, and the liquid cooling channel is connected with an external circulation mechanism through a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are bundled on the wire binding rod.

[0014] As a preferred solution of the battery rack, the battery rack includes at least two racks and a connecting piece, and two adjacent racks are detachably connected via the connecting piece.

[0015] As a preferred solution of the battery rack, the battery rack further includes a partition, the partition is detachably connected to the rack, and the partition is located between two adjacent racks.

[0016] As a preferred solution of the battery rack, the battery rack further comprises a wire tie seat, and the wire tie rod is provided with a plurality of wire tie seats at intervals along its length direction; and / or,

[0017] The length of the wire binding rod extends along the length direction of the connecting wire.

[0018] Advantages of the present utility model: By providing a wire-tying member with a wire-tying rod on the battery rack, the connecting wires of each battery pack can be connected to the wire-tying rod and arranged along the length direction of the wire-tying rod, so that the layout of each connecting wire is orderly and neatly arranged, reducing the occurrence of entanglement caused by the chaos of each connecting wire, and facilitating later maintenance and searching; By arranging multiple wire-tying rods at intervals, different connecting wires can be connected to different wire-tying rods at intervals, reducing the interference between different connecting wires; By detachably arranging the wire-tying member and the battery rack, it is convenient to disassemble and assemble, and it is also convenient for operators to select the number of wire-tying members according to actual needs, reducing the waste of wire-tying members, and it is also convenient for later maintenance, replacement or reuse. Description of the Drawings

[0019] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0020] Figure 1 is a schematic structural diagram of a battery rack according to an embodiment of the present utility model;

[0021] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0022] Figure 3 is a schematic structural diagram of a battery rack according to another embodiment of the present utility model;

[0023] Figure 4 is a schematic structural diagram of a wire-tying member according to an embodiment of the present utility model;

[0024] Figure 5 is a schematic structural diagram of a base according to an embodiment of the present utility model;

[0025] Figure 6 is a partial structural schematic diagram of a wire-tying rod according to an embodiment of the present utility model;

[0026] Figure 7 is a schematic structural diagram of a battery rack according to still another embodiment of the present utility model.

[0027] In the figure:

[0028] 1, frame; 2, tray; 3, wire-tying member; 31, base; 311, main body part; 312, clamping part; 313, limiting part; 314, clamping groove; 315, positioning part; 32, wire-tying rod; 321, positioning hole; 3211, guiding hole; 3212, connecting hole; 4, enclosing plate; 41, fixing part; 42, stopping part; 5, installation groove; 6, connecting block; 7, strengthening connecting column. Detailed Embodiments

[0029] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present utility model and not for limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0030] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and to the right", and "on the top" of the second feature includes the first feature being directly above and diagonally above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and to the left", and "underneath" the second feature includes the first feature being directly below and diagonally below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0032] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] Such as Figures 1 to 4As shown in the figure, the battery rack of the embodiment of the present utility model includes a rack 1 and a wire tying member 3. The rack 1 is used to support the battery pack. The wire tying member 3 is detachably connected to the rack 1. The wire tying member 3 includes a base 31 and at least two wire tying rods 32. The base 31 is detachably connected to the rack 1. All the wire tying rods 32 are arranged on the base 31 at intervals in the first direction (the first direction is the X direction shown in the figure). The wire tying rods 32 extend in the second direction (the second direction is the Y direction shown in the figure). The wire tying rods 32 are used to connect the connecting wires of the battery pack. The first direction and the second direction are arranged at an angle. It should be noted that the connecting wires of the battery pack include wires such as charging control wires, positive and negative connecting wires, temperature control wires, and communication wires that are connected to external mechanisms. When the wire tying member 3 is provided on each corresponding layer of the pallet 2 on the battery rack, the first direction is parallel to the vertical direction; when the wire tying member 3 is provided at the top of the wire rack, the first direction, the second direction, and the vertical direction are perpendicular to each other.

[0034] It can be understood that by providing the wire tying member 3 with the wire tying rods 32 on the battery rack, the connecting wires of each battery pack can be connected to the wire tying rods 32 and arranged along the length direction of the wire tying rods 32, so that the layout of each connecting wire is orderly and neatly arranged, which is convenient for later maintenance and easy to find; by arranging multiple wire tying rods 32 at intervals, different connecting wires can be connected to different wire tying rods 32 at intervals, reducing the interference between different connecting wires; by detachably arranging the wire tying member 3 and the battery rack, the disassembly and assembly are convenient, and it is convenient for the operator to select the number of wire tying members 3 according to actual needs, reducing the waste of wire tying members 3, and it is also convenient for later maintenance, replacement or reuse.

[0035] Optionally, as Figure 4 shown, a base 31 is respectively arranged at both ends of the wire tying rod 32 in the second direction, and the wire tying rod 32 is detachably connected to the base 31. By detachably connecting the wire tying rod 32 and the base 31, the wire tying member 3 can be disassembled into two independent parts for production and then assembled, reducing the production difficulty of the wire tying member 3, and reducing the maintenance cost when replacing the base 31 or the wire tying rod 32 of the wire tying member 3 later. In this embodiment, two bases 31 are arranged in the second direction, and the two bases 31 are respectively adjacent to both ends of the wire tying rod 32 in the second direction to ensure the connection strength of the wire tying rod 32 and reduce the shaking at the end of the wire tying rod 32. Preferably, one, two or more bases 31 are further arranged between the two bases 31 to strengthen the support strength at the middle position of the wire tying rod 32.

[0036] Furthermore, as Figure 5As shown, the base 31 includes a main body portion 311, a clamping portion 312, and a limiting portion 313. At least three clamping portions 312 are arranged at intervals along the first direction on the main body portion 311. A clamping groove 314 is formed at intervals between two adjacent clamping portions 312. The wire tying rod 32 is clamped in the clamping groove 314. At least one side of two adjacent sides of two adjacent clamping portions 312 that are close to each other protrudes with a limiting portion 313. The limiting portion 313 is used to prevent the wire tying rod 32 from disengaging from the clamping groove 314. By providing the clamping portions 312 to form a plurality of clamping grooves 314, the wire tying rod 32 can be directly clamped in the clamping groove 314, which is convenient and fast, and easy to disassemble and assemble. By providing the limiting portion 313, the wire tying rod 32 clamped in the clamping groove 314 can be effectively blocked, preventing the wire tying rod 32 from disengaging from the clamping groove 314 and improving the installation stability of the wire tying rod 32; the structure of the base 31 is simple, facilitating integral molding and convenient production.

[0037] Preferably, the distance between two adjacent wire tying rods 32 is greater than 30 mm. If the distance between the wire tying rods 32 is too small, it is easy to cause mutual influence between different connecting wires respectively connected to the two wire tying rods 32. This distance dimension is reasonable, which can ensure the space for installing the connecting wires between two adjacent wire tying rods 32 and reduce the influence between the connecting wires. In other embodiments, through holes are provided on the wire tying rod 32, and threaded holes are provided on the base 31. By passing a bolt through the through hole and screwing it into the threaded hole, the detachable connection between the wire tying rod 32 and the base 31 can also be realized. The threaded connection is stable and convenient for disassembly and assembly. Of course, the wire tying rod 32 can also be directly welded to the base 31 to ensure the connection strength between the wire tying rod 32 and the base 31. In this embodiment, waist-shaped holes are provided on the base 31, and threaded holes are provided on the frame 1. By passing a bolt through the waist-shaped hole and screwing it into the threaded hole, the connection between the base 31 and the frame 1 is realized, thereby realizing the detachable connection between the wire tying member 3 and the frame 1. The provision of the waist-shaped holes can facilitate the adjustment of the position of the base 31. The threaded connection method is stable and convenient for disassembly and assembly. In addition, the base 31 can also be connected to the frame 1 in the form of clamping or the like.

[0038] Further, as Figure 4 、 Figure 5 and Figure 6As shown, the base 31 further includes a positioning portion 315. A positioning portion 315 is protrudingly provided at the bottom of the clamping groove 314. A positioning hole 321 is recessed on the outer periphery of the wire tying rod 32, and the positioning portion 315 is inserted into the positioning hole 321. Through the cooperation of the positioning portion 315 and the positioning hole 321, on the one hand, the installation position accuracy of the wire tying rod 32 can be improved, avoiding different lengths of each wire tying rod 32 exposed from the base 31, and improving the coordination and aesthetics of the overall structure of the wire tying member 3; on the other hand, the wire tying rod 32 can be a cylindrical rod, the clamping groove 314 can be an arc-shaped groove, and the insertion of the positioning portion 315 into the positioning hole 321 can effectively limit the rotation of the wire tying rod 32 and improve the connection stability of the wire tying rod 32. Of course, in other embodiments, it is not limited to setting the positioning portion 315 on the main body portion 311 and setting the positioning hole 321 on the outer periphery of the wire tying rod 32. The positioning portion 315 can also be set on the outer periphery of the wire tying rod 32, and the positioning hole 321 can be set on the main body portion 311 and between two adjacent clamping portions 312.

[0039] Furthermore, as Figure 6 shown, the positioning hole 321 includes a guiding hole 3211 and a connecting hole 3212. The guiding hole 3211 is recessed on the outer periphery of the wire tying rod 32, the aperture of the guiding hole 3211 gradually decreases along the direction of its own hole depth, a connecting hole 3212 is opened at the bottom of the guiding hole 3211, and the positioning portion 315 is inserted into the connecting hole 3212. Through the setting of the guiding hole 3211, the insertion of the positioning portion 315 can be guided, improving the connection convenience between the positioning portion 315 and the connecting hole 3212, and avoiding the situations of difficult alignment, difficult insertion or even structural damage.

[0040] In some embodiments, as Figure 1 、 Figure 2 and Figure 3As shown, the battery rack also includes a support plate 2 and a panel 4 detachably connected to the rack 1. A plurality of support plates 2 are arranged at intervals along the vertical direction on the rack 1, and a plurality of panels 4 are arranged on the periphery of each support plate 2. All panels 4 on the periphery of each support plate 2 are combined to form a mounting groove 5 for limiting the position of the battery pack. By detachably connecting the panel 4 to the battery rack, the disassembly and assembly of the panel 4 is facilitated, and at least one panel 4 should be installed with the battery rack after the battery pack is placed on the support plate 2, so as to facilitate the placement of the battery pack and reduce the impact between the battery pack and the support plate 2. Specifically, a through hole is provided on the panel 4, and a threaded hole is provided on the rack 1. The panel 4 is connected to the rack 1 by passing a bolt through the through hole and screwing it into the threaded hole. The threaded connection method is stable and convenient for disassembly and assembly. Of course, a buckle can be provided on the panel 4, a slot is provided on the rack 1, and the buckle and the slot are connected in a form of snap connection. It can be understood that, by providing the enclosure 4, the surrounding sides of the battery pack placed on the pallet 2 can be effectively protected and blocked, thereby preventing external structures from colliding with the battery pack and causing damage, or preventing the battery pack from sliding off the pallet 2, thereby improving the safety of the battery pack on the pallet 2.

[0041] Furthermore, if Figure 2 As shown, the enclosure 4 includes a fixing portion 41 and a stopper 42. The fixing portion 41 is detachably connected to the frame 1. The fixing portion 41 is provided with a stopper 42 protruding toward one side of the battery pack. The stopper 42 is used to prevent the battery pack from being separated from the mounting groove 5. By setting the stopper 42, the top side of the battery pack can be effectively stopped, the jumping of the battery pack can be reduced, and the installation stability of the battery pack can be improved.

[0042] In other embodiments, Figure 1 As shown, the battery rack includes at least two racks 1 and a connector, and two adjacent racks 1 are detachably connected by the connector. Through the setting of the connector, multiple racks 1 can be spliced, so that multiple racks 1 can be spliced ​​into battery racks with different battery capacities, so that the battery rack can meet the needs of different scenarios and improve the versatility of the battery rack. In this embodiment, a plurality of expansion holes are arranged at intervals on the rack 1, and the expansion holes are threaded holes. At least two rows of through holes are arranged on the connector, and bolts are passed through the through holes and screwed into the expansion holes to connect the connector to the rack 1, and two adjacent racks 1 are connected through the connector to complete the expansion of the battery rack.

[0043] For example, Figure 1 As shown, the battery rack includes two racks 1, and the frames of the two racks 1 are aligned. At this time, the connecting piece includes a connecting piece, and the battery rack composed of the two racks 1 can be installed by connecting the expansion holes of the racks 1 with the connecting piece. Figure 7As shown, when the battery rack includes four racks 1, the connecting member includes a connecting piece, a connecting block 6, and a reinforcing connecting column 7. First, the four racks 1 are divided into two rack groups, each rack group includes two racks 1, the two racks 1 in each rack group are connected by a connecting piece, the two rack groups are arranged opposite to each other at intervals, and the two rack groups are connected by a connecting block 6 on the outermost side of the rack 1, and a reinforcing connecting column 7 is arranged in the intermediate area between the two rack groups. The reinforcing connecting column 7 is connected to the rack 1 in the two rack groups adjacent to the reinforcing connecting column 7 to enhance the connection strength between the two rack groups. Of course, in other embodiments, according to actual application requirements, the battery rack can also be provided with six, eight or more racks 1.

[0044] Furthermore, the battery rack further includes a partition board, the partition board is detachably connected to the rack 1, and the partition board is located between two adjacent racks 1. Through the arrangement of the partition board, the battery packs on two adjacent racks 1 can be effectively blocked, the spread of flames when the battery pack catches fire can be avoided, and the use safety of the battery rack can be improved. Therefore, the partition board can directly adopt an insulating board with high flame retardancy.

[0045] Even further, a liquid cooling channel is arranged in the pallet 2, and the liquid cooling channel is communicated with an external circulation mechanism through an inlet pipe and an outlet pipe. The inlet pipe and the outlet pipe are bundled on the wire tying rod 32. By integrating the liquid cooling structure into the pallet 2, in addition to the function of supporting the battery pack, the structure of the pallet 2 can also perform liquid cooling on the battery pack, reducing the setting of traditional liquid cooling plates, thereby reducing the occupied space of the liquid cooling plates and effectively improving the space utilization rate of the battery rack. For example, the external circulation mechanism transports the coolant through the inlet pipe into the liquid cooling channel for heat exchange, and the coolant with a certain temperature after heat exchange is transported back to the external circulation mechanism through the outlet pipe for re-liquid cooling, so as to complete the continuous liquid cooling of the liquid cooling plate and ensure the liquid cooling effect of the battery pack.

[0046] Optionally, the battery rack further includes a wire tying seat, and a plurality of wire tying seats are arranged at intervals along the length direction of the wire tying rod 32. Through the arrangement of the wire tying seat, it is convenient for the connecting wire to realize fixed-point bundling connection, that is, the connecting member can be bundled on the wire tying seat by using a bundling band, reducing the sliding of the bundling band and ensuring the stability of the connection position between the connecting wire and the wire tying rod 32. Of course, the connecting wire can also be directly bundled on the wire tying rod 32 by using a bundling band to complete the connection between the connecting member and the wire tying rod 32. In addition, the connecting wire can also be directly wound around the outer circumference of the wire tying rod 32.

[0047] Preferably, the length of the wire tying rod 32 extends along the length direction of the connecting wire. The wire tying rod 32 is used to guide the connecting wire in the length direction, making the layout of the connecting wire more orderly and reducing chaos.

[0048] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A battery rack, characterized in that: It includes a frame and a wire tie piece, the frame is used to support the battery pack, the wire tie piece is detachably connected to the frame, the wire tie piece includes a base and at least two wire tie rods, the base is connected to the frame, all the wire tie rods are arranged on the base at intervals along a first direction, and the wire tie rods extend along a second direction, the wire tie rods are used to connect the connecting wires of the battery pack, and the first direction and the second direction are arranged at an angle.

2. The battery rack according to claim 1, characterized in that: The two ends of the wire-binding rod along the second direction are respectively provided with a base, and the wire-binding rod is detachably connected to the base.

3. The battery rack according to claim 2, characterized in that: The base includes a main body, a clamping part and a limiting part. At least three clamping parts are arranged on the main body along the first direction at intervals. A clamping groove is formed between two adjacent clamping parts. The wire binding rod is clamped in the clamping groove. The limiting part is protruding on at least one of the two side surfaces of two adjacent clamping parts. The limiting part is used to prevent the wire binding rod from escaping from the clamping groove.

4. The battery rack according to claim 3, characterized in that: The base further comprises a positioning portion, the bottom of the clamping groove is protrudingly provided with the positioning portion, the outer periphery of the wire binding rod is recessedly provided with a positioning hole, and the positioning portion is inserted into the positioning hole.

5. The battery rack according to claim 4, characterized in that: The positioning hole includes a guide hole and a connecting hole. The guide hole is recessed on the outer periphery of the wire binding rod. The diameter of the guide hole gradually decreases along the hole depth direction. The connecting hole is opened at the bottom of the guide hole. The positioning portion is inserted into the connecting hole.

6. The battery rack according to any one of claims 1 to 5, characterized in that: The battery rack also includes a support plate and a surrounding plate detachably connected to the frame. A plurality of the support plates are arranged on the frame at intervals in the vertical direction, and a plurality of surrounding plates are arranged on the periphery of each of the support plates. All the surrounding plates on the periphery of each of the support plates are combined to form an installation groove for limiting the position of the battery pack.

7. The battery rack according to claim 6, characterized in that: The enclosure includes a fixing portion and a stopper, wherein the fixing portion is detachably connected to the frame, and the fixing portion is provided with the stopper protruding toward one side of the battery pack, and the stopper is used to prevent the battery pack from being separated from the mounting slot; and / or, A liquid cooling channel is arranged in the support plate, and the liquid cooling channel is connected with an external circulation mechanism through a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are bundled on the wire binding rod.

8. The battery rack according to any one of claims 1 to 5, characterized in that: The battery rack includes at least two racks and a connecting piece, and two adjacent racks are detachably connected via the connecting piece.

9. The battery rack according to claim 8, characterized in that: The battery rack further comprises a partition, which is detachably connected to the rack and is located between two adjacent racks.

10. The battery rack according to any one of claims 1 to 5, characterized in that: The battery rack further comprises a cable tie seat, and the cable tie rod is provided with a plurality of cable tie seats at intervals along its length direction; and / or, The length of the wire binding rod extends along the length direction of the connecting wire.

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