Connecting device for copper bar and aluminum bar of battery

Abstract

The invention provides a connecting device for a copper bar and an aluminum bar of a battery, and relates to the field of wire bar connection. The battery copper bar and aluminum bar connecting device comprises a connecting wire bar and a lap joint wire bar, bearing grooves for bearing extrusion deformation are formed in the middles of the two sides of the connecting wire bar, the lap joint wire bar covers the bearing grooves, the extrusion deformation edge of the lap joint wire bar protrudes to form a deformation protrusion, and the middle and the upper portion of the bottom end of the deformation protrusion make contact with the connecting wire bar. According to the connecting device for the copper bar and the aluminum bar of the battery, the lap joint wire bar is extruded and deformed to form a cavity in the bearing groove of the connecting wire bar, the bottom end of the cavity formed by the connecting wire bar is extruded outwards through the extrusion mechanism, and the part protrudes outwards to be in contact with the connecting wire bar; the extrusion mechanism integrally extrudes the connecting wire bar and the lap joint wire bar, the lap joint wire bar and the connecting wire bar can be mutually inserted together and tightly attached, and the problems that in the prior art, the connecting wire bar and the lap joint wire bar are not tightly connected, and the strength is insufficient are solved.

Description

Technical Field

[0001] The invention relates to the field of wire bus connection, and in particular to a battery copper bus and aluminum bus connection device. Background Art

[0002] The main reason why copper and aluminum cannot be directly connected is due to the difference in their electrochemical properties. When copper and aluminum are in direct contact, due to their different potentials, a galvanic effect will be formed, which will accelerate the oxidation of aluminum, resulting in increased contact resistance, which will cause problems such as poor contact, heating and even fire. In addition, aluminum is more active than copper and is more easily oxidized, which further aggravates this corrosion phenomenon. In order to prevent these problems, transition connection measures are usually required. When connecting copper wires and aluminum wires, copper-aluminum transition wire clamps or transition connection tubes are required to avoid direct connection.

[0003] The original solution was to use friction welding technology to manufacture copper and aluminum materials so that the two fit tightly together, and open through holes at both ends for bolts to compact and fix the wire noses. This connection method has a small contact area and is easy to fall off.

[0004] The existing patent (CN118117424B) is a method for manufacturing a copper-aluminum terminal and a copper-aluminum terminal, which aims to solve the problems in the prior art that the connection part and the functional part of the copper-aluminum terminal are easily oxidized to produce a brittle phase during high-temperature welding, thereby resulting in insufficient connection strength between the connection part and the functional part of the copper-aluminum terminal, and easy breakage under high-intensity work or force.

[0005] This technical solution reserves a through hole for soldering on the side of the groove through a punching device, and performs soldering reinforcement into the groove through the through hole, which can effectively avoid the problem of uneven solder filling, thereby improving the electrical connection performance of the copper-aluminum terminal block. However, the connection method in this technical solution still uses bolts to fix one end of the connection.

[0006] The existing patent (CN203521662U) is a bidirectional copper-aluminum terminal, which relates to the technical field of terminal blocks; it includes two aluminum terminals, a copper contact sheet, and a through hole; the copper contact sheet is rectangular; the two terminals are welded at both ends of the copper contact sheet; the copper contact sheet is provided with a through hole; the copper contact sheet of the bidirectional copper-aluminum terminal is circular; the through hole of the bidirectional copper-aluminum terminal is provided at the center of the copper contact sheet; the technical solution adopts a bidirectional copper-aluminum terminal to reduce the number of terminals used, overcome the problem of connection difficulties caused by the overlap of the two terminals, and reduce the working intensity. However, the connection strength is low only by extrusion deformation after the wire row is inserted, and the sleeve-type connection method will form a large bulge at the connection end, which occupies space in the battery installation space. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention provides a battery copper bar and aluminum bar connection device, which solves the problem of loose connection and low connection strength between the copper bar and the aluminum bar mentioned in the above background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a battery copper bar and aluminum bar connection device, including a connecting wire bar formed by friction welding of copper and aluminum, and a lap wire bar made of aluminum and copper respectively. A bearing groove for bearing extrusion deformation is opened in the middle of both sides of the connecting wire bar, and the lap wire bar covers the top of the bearing groove. The lap wire bar is extruded and deformed downward by an extrusion mechanism in the bearing groove, and then protrudes toward the edge to form a deformation protrusion that contacts the connecting wire bar in the middle of the bottom and the top.

[0009] Preferably, the bottom edge of the bearing groove is provided with a bevel opening, and the bottom end portion of the deformation protrusion is located inside the bevel opening.

[0010] Preferably, a welding box is provided on the outside of the overlapping wire bank and the connecting wire bank, and the welding box is divided into an upper fixed cover and a lower fixed cover, which are plugged into each other, and an insertion port for placing the overlapping wire bank and the connecting wire bank is provided at the bottom end of the lower fixed cover, and a pouring port for pouring solder into the interior of the welding box and an exhaust port for exhausting gas are provided above the upper fixed cover, and the solder fills the deformed protrusion and wraps around the overlapping wire bank and the connecting wire bank to form a solder clamp.

[0011] Preferably, the extrusion mechanism includes an extrusion box body, which is divided into an upper connecting part and a lower connecting part, and the two ends of the lower connecting part are provided with placement openings for placing the overlapping wire rows and the connecting wire rows, and the two sides of the lower connecting part are provided with sliding grooves parallel to the overlapping directions of the overlapping wire rows and the connecting wire rows, and the two sides of the bottom end of the upper connecting part are fixedly installed with sliding blocks slidably connected to the inside of the sliding groove, and the upper surface of the upper connecting part is symmetrically fixedly installed with a telescopic sleeve 1, and the bottom end of the telescopic sleeve 1 is fixedly installed with a pressure block, which is sleeved inside the bearing groove, and the bottom end of the pressure block is fixedly installed with equidistantly distributed connecting support columns, and the connecting support A pressure plate is fixedly installed at the bottom end of the column, a connecting frame is fixedly installed at the free ends of the two telescopic sleeves, a telescopic sleeve second is fixedly installed in the middle of the connecting frame, a semi-through groove is opened above the pressure block, an extension rod is slidably connected to the middle of the semi-through groove, the extension rod is fixedly connected to the free end of the telescopic sleeve second, the extension rod passes through the pressure block and extends between the pressure block and the pressure plate, an active extrusion block is fixedly installed at the bottom end of the extension rod, passive extrusion blocks are arranged on both sides of the active extrusion block, which move to both sides when the active extrusion block moves downward, the passive extrusion block is slidably connected to the pressure block and the pressure plate, and the two passive extrusion blocks are fixedly connected by a reset spring.

[0012] Preferably, a plane pressing frame is arranged inside the extrusion box body and outside the bearing groove, and the plane pressing frame and the inner top wall of the upper connecting part are fixedly connected by a plurality of telescopic sleeves.

[0013] Preferably, the upper surfaces of the plurality of extension rods are fixedly connected via a connecting plate, the connecting plate is fixedly connected to the free end of the second telescopic sleeve, the connecting plate and the inner bottom wall of the semi-through groove are fixedly connected via a compression spring, and the compression spring is sleeved on the outer surface of the extension rod.

[0014] Preferably, the cross-sectional shape of the passive extrusion block is "L"-shaped, the upper ends of the passive extrusion blocks on the side close to each other are chamfered, the cross-sectional shape of the active extrusion block is an isosceles trapezoid, and the active extrusion block and the passive extrusion block are fitted together at the chamfered corners.

[0015] Preferably, limit blocks are arranged at the upper and lower ends of the passive extrusion block, and a limit groove adapted to the limit block is provided on the side where the pressing block and the pressing plate are close to each other.

[0016] Preferably, a support plate for supporting the overlapping wire row is arranged inside the lower connecting portion, and the thickness of the support plate is the same as the thickness of the connecting wire row.

[0017] Preferably, the cross-sectional shape of the connecting frame is a "concave" shape, and the telescopic sleeve 2 is arranged between the fixed ends of the two telescopic sleeves 1.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The battery copper bar and aluminum bar connection device extrude the overlapping wire row overlapped on the top of the connecting wire row through an extrusion mechanism, so that the overlapping wire row can be extruded and deformed to form a cavity in the bearing groove of the connecting wire row, and the bottom end of the cavity formed by the connecting wire row is extruded outward by the extrusion mechanism, so that the part protrudes outward to contact the connecting wire row, and the connecting wire row and the overlapping wire row are integrally extruded by the extrusion mechanism, so that the overlapping wire row and the connecting wire row can be plugged together and tightly fitted, avoiding the loose connection and insufficient strength of the connecting wire row and the overlapping wire row in the prior art.

[0020] 2. The battery copper bar and aluminum bar connection device places the overlapping wire bar and the connecting wire bar into the welding box, fills the solder into the welding box through the pouring port, so that the solder fills the entire welding box, thereby forming a solder clamp wrapped around the outer surface of the overlapping wire bar and the connecting wire bar and wrapping the overlapping wire bar and the connecting wire bar, completing the connection of one side of the overlapping wire bar and the connecting wire bar, and ensuring the connection stability and the strength of the device.

[0021] 3. The battery copper bar and aluminum bar connecting device has limit blocks at the upper and lower ends of the passive extrusion block, and a limit groove adapted to the limit block is opened on the side where the pressing block and the pressing plate are close to each other. The limit block has two functions. One is to cooperate with the limit groove to limit the moving direction of the passive extrusion block, and at the same time, it can strengthen the connection between the passive extrusion block and the pressing block, so that the pressing plate can be extruded synchronously, avoiding the problem of deformation of the extrusion plate only connected by the extension rod.

[0022] 4. The battery copper bar and aluminum bar connecting device has an extruded box body divided into an upper connecting part and a lower connecting part. Placement openings for placing overlapping wire rows and connecting wire rows are provided at both ends of the lower connecting part. Sliding grooves parallel to the overlapping directions of the overlapping wire rows and connecting wire rows are provided on both sides of the lower connecting part. By setting the sliding grooves parallel to the overlapping direction, the upper connecting part and the lower connecting part can be connected as a whole, so that they will not fall off during extrusion deformation. When the upper connecting part slides and is misaligned relative to the lower connecting part, the upper connecting part and the lower connecting part can be separated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of a stacked conductor row according to the present invention;

[0024] Figure 2 It is a cross-sectional schematic diagram of a connecting wire row of the present invention;

[0025] Figure 3 It is a schematic diagram of the cross-section of the overlapping conductor row and the connecting conductor row of the present invention;

[0026] Figure 4 It is a schematic diagram of the welding box of the present invention;

[0027] Figure 5 This is a schematic diagram of the upper fixed cover of the present invention;

[0028] Figure 6 This is a schematic diagram of the connection of the extruded box of the present invention;

[0029] Figure 7 It is a half-section schematic diagram of the upper connecting part of the present invention;

[0030] Figure 8 This is a schematic diagram of the plane press frame connection of the present invention;

[0031] Fig. 9 This is a schematic diagram of a connection of a telescopic sleeve of the present invention;

[0032] Fig.10 This is a schematic diagram of the connection of the active extrusion block of the present invention;

[0033] Fig.11 This is a schematic diagram of the connection of the pressing blocks of the present invention;

[0034] Fig.12This is a schematic diagram of the connection of the passive extrusion block of the present invention.

[0035] In the figure: 1, connecting wire row; 2, overlapping wire row; 3, bearing groove; 7, extrusion mechanism; 4, deformation protrusion; 5, slope mouth; 6, welding box; 601, upper fixed cover; 602, lower fixed cover; 603, insertion port; 604, pouring port; 605, exhaust port; 606, solder clamp; 701, extrusion box; 7011, upper connecting part; 7012, lower connecting part; 702, placement port; 703, sliding groove; 704, sliding block; 705, telescopic sleeve one; 706, pressure block; 707, connecting support column; 708, pressure plate; 709, connecting frame; 710, telescopic sleeve two; 711, half-through groove; 712, telescopic sleeve three; 713, extension rod; 714, active extrusion block; 715, passive extrusion block; 716, reset spring; 717, plane pressure frame; 718, connecting plate; 719, compression spring; 720, limit block; 721, limit groove; 722, support plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0040] like Figure 1-12 As shown, a battery copper bar and aluminum bar connection device includes a connecting wire bar 1 formed by friction welding of copper and aluminum, and a lap wire bar 2 made of aluminum and copper respectively. A bearing groove 3 for bearing extrusion deformation is provided in the middle of both sides of the connecting wire bar 1. The lap wire bar 2 covers the upper part of the bearing groove 3. The lap wire bar 2 is extruded and deformed downwardly in the bearing groove 3 by an extrusion mechanism 7, and then protrudes toward the edge to form a deformation protrusion 4 that contacts the connecting wire bar 1 in the middle of the bottom and the upper part.

[0041] The bottom edge of the bearing groove 3 is provided with a beveled opening 5, and the bottom end portion of the deformed protrusion 4 is located inside the beveled opening 5. By providing the beveled opening 5, the contact area between the overlapping wire row 2 and the connecting wire row 1 can be increased, and at the same time, the bottom end portion of the deformed protrusion 4 can be in contact with the bearing groove 3, thereby limiting the upward movement of the overlapping wire row 2.

[0042] A welding box 6 is arranged outside the lap wire row 2 and the connecting wire row 1. The welding box 6 is divided into an upper fixed cover 601 and a lower fixed cover 602. A plug-in rod and a plug-in sleeve are respectively arranged between the upper fixed cover 601 and the lower fixed cover 602 for connection. The upper fixed cover 601 and the lower fixed cover 602 are plugged in. An insertion port 603 for placing the lap wire row 2 and the connecting wire row 1 is opened at the bottom end of the lower fixed cover 602. The lap wire row 2 is placed above the connecting wire row 1. Therefore, the heights of the insertion ports 603 on both sides are different. However, the dividing line between the upper fixed cover 601 and the lower fixed cover 602 is located at the lower edge of the insertion port 603. The upper fixed cover 6 A pouring port 604 for pouring solder into the interior of the welding box 6 and an exhaust port 605 for exhausting gas are provided above 01. The solder is filled into the interior of the welding box 6 from the pouring port 604, and the squeezed gas is discharged from the exhaust port 605. The solder fills the deformed protrusion 4 and is wrapped around the overlapping wire row 2 and the connecting wire row 1 to form a solder clamp 606. The solder can be a similar metal solution or a tin solution. Through such a setting, the connection position of the overlapping wire row 2 and the connecting wire row 1 can be filled with solder, thereby ensuring that the connection between the overlapping wire row 2 and the connecting wire row 1 is stable and at the same time increasing the strength of the connection.

[0043] The extrusion mechanism 7 includes an extrusion box 701, which is divided into an upper connection part 7011 and a lower connection part 7012. The two ends of the lower connection part 7012 are provided with placement openings 702 for placing the overlapping wire row 2 and the connecting wire row 1. The extrusion box 701 is opened in the same manner as the welding box 6. The two sides of the lower connection part 7012 are provided with sliding grooves 703 parallel to the overlapping direction of the overlapping wire row 2 and the connecting wire row 1. By setting the sliding grooves 703 parallel to the overlapping direction, the upper connection part 7011 and the lower connection part 7012 can be connected as a whole, so that they will not fall off during extrusion deformation. When the upper connection part 7011 is relative to the lower connection part 7012, the upper connection part 7011 and the lower connection part 7012 can be connected as a whole. After the sliding dislocation, the upper connection part 7011 and the lower connection part 7012 can be separated. The two sides of the bottom end of the upper connection part 7011 are fixedly installed with sliding blocks 704 that are slidably connected to the inside of the sliding groove 703. The upper surface of the upper connection part 7011 is symmetrically fixedly installed with a telescopic sleeve 705. The bottom end of the telescopic sleeve 705 is fixedly installed with a pressing block 706. The telescopic sleeve 705 can push the pressing block 706 to slide when it works, so that the overlapping wire row 2 can be squeezed into the bearing groove 3. The pressing block 706 is sleeved inside the bearing groove 3. The bottom end of the pressing block 706 is fixedly installed with equidistantly distributed connecting support columns 707. By setting the connecting support columns 70 7 can reserve space for the device moving outward, the bottom end of the connecting support column 707 is fixedly installed with a pressing plate 708, and the pressing plate 708 can squeeze the overlapping wire row 2 to deform, the free ends of the two telescopic sleeves 705 are fixedly installed with a connecting frame 709, and the middle part of the connecting frame 709 is fixedly installed with a telescopic sleeve 2 710, and a semi-through groove 711 is opened above the pressing block 706, and the middle part of the semi-through groove 711 is slidably connected with an extension rod 713, and the extension rod 713 is fixedly connected to the free end of the telescopic sleeve 2 710, and the extension rod 713 passes through the pressing block 706 and extends between the pressing block 706 and the pressing plate 708. The bottom end of the extension rod 713 is fixedly installed with an active extrusion Block 714, passive extrusion blocks 715 are arranged on both sides of the active extrusion block 714, which move to both sides when the active extrusion block 714 moves downward, and the telescopic sleeve 710 moves downward, which can push the extension rod 713 to move downward, so that the passive extrusion block 715 can be squeezed to both sides, so that the bottom end of the cavity of the overlapping wire row 2 that is squeezed and deformed in the bearing groove 3 can be squeezed out of the protrusion, the passive extrusion block 715 is slidably connected with the pressure block 706 and the pressure plate 708, and the two passive extrusion blocks 715 are fixedly connected by a reset spring 716, and the reset spring 716 can drive the two passive extrusion blocks 715 to reset close to each other after moving.

[0044] A flat pressure frame 717 is arranged inside the extrusion box 701 on the outside of the bearing groove 3. The flat pressure frame 717 and the inner top wall of the upper connecting part 7011 are fixedly connected by a plurality of telescopic sleeves 3 712. The flat pressure frame 717 can be pushed downward by the telescopic sleeves 3 712, so as to squeeze the overlapping wire row 2, so that the overlapping wire row 2 and the connecting wire row 1 are tightly connected.

[0045] The upper surfaces of multiple extension rods 713 are fixedly connected by a connecting plate 718, and the connecting plate 718 is fixedly connected to the free end of the telescopic sleeve 710. The connecting plate 718 and the inner bottom wall of the semi-through groove 711 are fixedly connected by a compression spring 719. The compression spring 719 is sleeved on the outer surface of the extension rod 713. Through such an arrangement, the extension rod 713 can be automatically reset after the telescopic sleeve 710 is reset.

[0046] The cross-sectional shape of the passive extrusion block 715 is "L"-shaped, and the upper end of the side where the passive extrusion blocks 715 are close to each other is chamfered. The cross-sectional shape of the active extrusion block 714 is an isosceles trapezoid. The active extrusion block 714 and the passive extrusion block 715 fit together at the chamfered corners. Through the mutual extrusion between the inclined surfaces, the passive extrusion block 715 can be squeezed outward by the active pressure block 706.

[0047] Limiting blocks 720 are set at the upper and lower ends of the passive extrusion block 715, and a limiting groove 721 adapted to the limiting block 720 is opened on the side where the pressing block 706 and the pressing plate 708 are close to each other. The limiting block 720 has two functions. One is to cooperate with the limiting groove 721 to limit the moving direction of the passive extrusion block 715, and at the same time, it can strengthen the connection between the passive extrusion block 715 and the pressing block 706, so that the pressing plate 708 can be extruded synchronously, avoiding the problem that the extrusion plate 708 is easily deformed when it is only connected by the extension rod 713.

[0048] A support plate 722 for supporting the overlapping wire row 2 is arranged inside the lower connecting part 7012. The thickness of the support plate 722 is the same as the thickness of the connecting wire row 1. This arrangement can limit the insertion depth of the connecting wire row 1 and ensure that the overlapping wire row 2 and the connecting wire row 1 are subjected to uniform force when squeezed.

[0049] The cross-section of the connecting frame 709 is in a "concave" shape, and the telescopic sleeve 2 710 is arranged between the fixed ends of the two telescopic sleeves 1 705. This arrangement can make the connecting frame 709 concave, so that the telescopic sleeve 2 710 can be easily installed, and this installation method can save space.

[0050] When in use, the overlapping wire row 2 to be overlapped is annealed to increase the plasticity of the overlapping wire row 2, the connecting wire row 1 is inserted into the interior of the extrusion box 701, so that the connecting wire row 1 is in contact with the support plate 722, and the overlapping wire row 2 is inserted into the interior of the extrusion box 701 and is located above the connecting wire row 1 and the support plate 722. First, the telescopic sleeve 1 705 works to drive the pressure block 706 and the pressure plate 708 to move and extrude the overlapping wire row 2, which protrudes into the bearing groove 3 to form a cavity, and then the telescopic sleeve 2 710 works to push The extension rod 713 moves, and the passive extrusion block 715 is squeezed by the active extrusion block 714, so that the passive extrusion block 715 protrudes to both sides, so that the bottom end of the cavity formed by the overlapping wire row 2 in the bearing groove 3 can be protruded to both sides to form a deformed protrusion 4, and the telescopic sleeve 1 705 and the telescopic sleeve 2 710 are reset. At this time, a overlapping wire row 2 and a connecting wire row 1 can be connected. The telescopic sleeve 3 712 works and can drive the plane pressing frame 717 to work, so that the overlapping wire row 2 can be squeezed, so that the connecting wire row 1 and the overlapping wire row 2 are closely fitted;

[0051] The bonding wire row 2 and the connecting wire row 1 are placed in the welding box 6, and the solder is filled into the welding box 6 through the pouring port 604 so that the solder fills the entire welding box 6, thereby forming a solder clamp 606 that wraps around the outer surface of the bonding wire row 2 and the connecting wire row 1 and wraps around the bonding wire row 2 and the connecting wire row 1, completing the connection of one side of the bonding wire row 2 and the connecting wire row 1, and similarly connecting the bonding wire row 2 and the connecting wire row 1 on the other side.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0053] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery copper bar and aluminum bar connection device, comprising a connecting wire bar (1) formed by friction welding of copper and aluminum, and a lapped wire bar (2) made of aluminum and copper, characterized in that: The connecting wire row (1) is provided with bearing grooves (3) in the middle of both sides for bearing extrusion deformation, and the overlapping wire row (2) covers the upper part of the bearing grooves (3). The overlapping wire row (2) is deformed by downward extrusion by the extrusion mechanism (7) in the bearing grooves (3) and then protrudes toward the edge to form a deformation protrusion (4) in the middle of the bottom end and the upper part that contacts the connecting wire row (1).

2. A battery copper bar and aluminum bar connection device according to claim 1, characterized in that: The bottom edge of the bearing groove (3) is provided with a bevel opening (5), and the bottom end portion of the deformation protrusion (4) is located inside the bevel opening (5).

3. A battery copper bar and aluminum bar connection device according to claim 2, characterized in that: A welding box (6) is arranged outside the overlapping wire row (2) and the connecting wire row (1), and the welding box (6) is divided into an upper fixed cover (601) and a lower fixed cover (602). The upper fixed cover (601) and the lower fixed cover (602) are plugged into each other, and an insertion port (603) for placing the overlapping wire row (2) and the connecting wire row (1) is provided at the bottom end of the lower fixed cover (602), and a pouring port (604) for pouring solder into the welding box (6) and an exhaust port (605) for exhausting gas are provided above the upper fixed cover (601), and the solder fills the deformed protrusion (4) and is wrapped around the overlapping wire row (2) and the connecting wire row (1) to form a solder clamp (606).

4. A battery copper bar and aluminum bar connection device according to claim 2 or 3, characterized in that: The extrusion mechanism (7) comprises an extrusion box (701), the extrusion box (701) is divided into an upper connecting part (7011) and a lower connecting part (7012), both ends of the lower connecting part (7012) are provided with placement openings (702) for placing the overlapping wire row (2) and the connecting wire row (1), both sides of the lower connecting part (7012) are provided with sliding grooves (703) parallel to the overlapping direction of the overlapping wire row (2) and the connecting wire row (1), and both sides of the bottom end of the upper connecting part (7011) are fixedly mounted with sliding blocks (704) slidably connected to the inside of the sliding grooves (703); A telescopic sleeve (705) is symmetrically fixedly mounted on the upper surface of the upper connecting portion (7011), a pressure block (706) is fixedly mounted on the bottom end of the telescopic sleeve (705), the pressure block (706) is sleeved inside the bearing groove (3), and equidistantly distributed connecting support columns (707) are fixedly mounted on the bottom end of the pressing block (706), and a pressure plate (708) is fixedly mounted on the bottom end of the connecting support columns (707); The free ends of the two telescopic sleeves (705) are fixedly mounted with a connecting frame (709), the middle of the connecting frame (709) is fixedly mounted with a telescopic sleeve (710), a semi-through groove (711) is provided above the pressing block (706), the middle of the semi-through groove (711) is slidably connected with an extension rod (713), the extension rod (713) is fixedly connected to the free end of the telescopic sleeve (710), and the extension rod (713) passes through the pressing block (706) and extends An active extrusion block (714) is fixedly installed at the bottom end of the extension rod (713) between the pressing block (706) and the pressing plate (708), and passive extrusion blocks (715) are arranged on both sides of the active extrusion block (714) and move to both sides when the active extrusion block (714) moves downward. The passive extrusion block (715) is slidably connected to the pressing block (706) and the pressing plate (708), and the two passive extrusion blocks (715) are fixedly connected via a return spring (716).

5. A battery copper bar and aluminum bar connection device according to claim 4, characterized in that: A plane pressing frame (717) is arranged inside the extrusion box (701) and outside the bearing groove (3); the plane pressing frame (717) and the inner top wall of the upper connecting part (7011) are fixedly connected via a plurality of telescopic sleeves (712).

6. A battery copper bar and aluminum bar connection device according to claim 5, characterized in that: The upper surfaces of the plurality of extension rods (713) are fixedly connected via a connecting plate (718), the connecting plate (718) is fixedly connected to the free end of the second telescopic sleeve (710), the connecting plate (718) and the inner bottom wall of the semi-through groove (711) are fixedly connected via a compression spring (719), and the compression spring (719) is sleeved on the outer surface of the extension rod (713).

7. A battery copper bar and aluminum bar connection device according to claim 6, characterized in that: The cross-sectional shape of the passive extrusion block (715) is "L"-shaped, the upper ends of the passive extrusion blocks (715) on the sides close to each other are chamfered, the cross-sectional shape of the active extrusion block (714) is an isosceles trapezoid, and the active extrusion block (714) and the passive extrusion block (715) fit together at the chamfered corners.

8. A battery copper bar and aluminum bar connection device according to claim 7, characterized in that: Limiting blocks (720) are arranged at the upper and lower ends of the passive extrusion block (715), and a limiting groove (721) adapted to the limiting block (720) is provided on the side where the pressing block (706) and the pressing plate (708) are close to each other.

9. A battery copper bar and aluminum bar connection device according to claim 8, characterized in that: A support plate (722) for supporting the overlapping wire row (2) is arranged inside the lower connecting portion (7012); the thickness of the support plate (722) is the same as the thickness of the connecting wire row (1).

10. A battery copper bar and aluminum bar connection device according to claim 9, characterized in that: The cross-section of the connecting frame (709) is in the shape of a "concave" character, and the telescopic sleeve 2 (710) is arranged between the fixed ends of the two telescopic sleeves 1 (705).

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