Welding platform for manufacturing lithium battery pack

Abstract

The invention discloses a welding platform for manufacturing a lithium battery pack, and belongs to the technical field of lithium battery welding, the welding platform comprises an operation table for placing a battery pack and two bidirectional guide rails for adjusting and collecting a flat cable and a protection plate, a positioning seat is arranged on the operation table, and a positioning assembly for positioning the battery pack is arranged on the positioning seat. Through the arrangement of the voltage measuring assembly and the voltmeter, voltage measurement of all contacts of the flat cable after welding can be rapidly completed by using one-by-one descending and ascending of the voltage measuring telescopic guide rod, compared with one-by-one measurement of small-interval contacts of the flat cable with a touch pen at present, the measurement is more efficient and accurate, it is guaranteed that the voltage of the flat cable after welding is normal, and the accuracy of welding is improved. And meanwhile, through the arrangement of the retarding electromagnetic plate and the welding isolation seat, a controllable magnetic field of the retarding electromagnetic plate can be utilized to generate dynamic damping force, and magnetic-gas double-field stable control is formed in combination with airflow adsorption, so that the swing amplitude of the welding copper ring of the lightweight collection flat cable is greatly reduced, and the problem of winding of fine-pitch copper wires is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery welding, and particularly relates to a welding platform for manufacturing a lithium battery pack. Background Art

[0002] Lithium battery welding is the core process to achieve reliable connection between battery cells, between the battery cell and the protection board (BMS), between the module and the housing, etc., directly affecting the safety, energy density and cycle life of the battery pack.

[0003] Currently, when welding the battery cells and the protection board of a lithium battery pack, it is necessary to separately weld and connect the wiring of the protection board's cable to the total negative electrode of the lithium battery pack, the negative electrode of each single battery, and the total positive electrode of the lithium battery pack. At the same time, to avoid burning out the components in the protection board during the process of connecting the wires one by one, usually, the correctness of the wiring is detected after the connection of the acquisition cable is completed, and then the connection between the acquisition cable and the protection board is carried out. Currently, the current welding connection and the detection after wiring are generally carried out manually, making the entire welding process complicated and the wiring efficiency low. At the same time, during the mechanical operation process, the copper wires on the acquisition cable swing greatly, and are easily entangled with each other, affecting the subsequent separate welding of the acquisition cable and the battery pack. And because the interval between single batteries is small after the lithium battery pack is assembled, to prevent the short circuit of the battery pack, usually, insulating glue or high-temperature tape is immediately covered after welding to avoid metal exposure, further increasing the operation of the overall welding process. And if the insulation of the welding part is not timely after welding, it is easy to cause the welding part to contact the metal shell of the battery pack, adjacent battery cells or other conductive components, resulting in direct short circuit between the positive and negative electrodes and causing damage to the battery pack. Therefore, a welding platform for manufacturing a lithium battery pack is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that when welding the battery cells and the protection board of a lithium battery pack in the prior art, it is necessary to separately weld and connect the wiring of the protection board's cable to the total negative electrode of the lithium battery pack, the negative electrode of each single battery, and the total positive electrode of the lithium battery pack. At the same time, to avoid burning out the components in the protection board during the process of connecting the wires one by one, usually, the correctness of the wiring is detected after the connection of the cable is completed, and then the connection between the cable and the protection board is carried out. Currently, the current welding connection and the detection after wiring are generally carried out manually, making the entire welding process complicated and the wiring efficiency low, and a welding platform for manufacturing a lithium battery pack is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A welding platform for manufacturing a lithium battery pack, comprising an operating table for placing battery components and two bidirectional guide rails for adjusting the acquisition wiring harness and the protection board. A positioning seat is arranged on the operating table, and a positioning component for positioning the battery components is arranged on the positioning seat. The upper side wall and the lower side wall of the bidirectional guide rail are respectively connected with two positioning sliding seats and two welding sliding seats. The positioning sliding seat on one side is connected with an electric control clamping rod through a suspension plate. A voltmeter is arranged on the side wall of the electric control clamping rod, and a voltage measuring component for detecting the voltage on each contact after the acquisition wiring harness is welded is arranged on the side wall of the voltmeter;

[0007] The bottom end of the welding sliding seat is connected with a blocking electromagnetic plate through a hydraulic push rod. The output end of the hydraulic push rod is connected with a welding isolation seat through a mounting plate. The bottom end of the welding isolation seat is connected with a transition cover. The bottom end of the transition cover is connected with a conversion seat through an electric control hinge. A plurality of control manipulators and welding robotic arms are respectively connected to the inner end faces of the two conversion seats. An insulating component is arranged in the two transition covers.

[0008] Preferably, the positioning component is composed of two bidirectional electric control push rods and two positioning concave plates. A sliding groove is opened at the top end of the operating table. The inner side wall of the sliding groove is slidably connected with the positioning seat. The top end of the positioning seat is fixedly connected with the bidirectional electric control push rod through a fixing plate. The two output ends of the bidirectional electric control push rod are respectively fixedly connected with the ends of the two positioning concave plates. A protective cover is assembled at the top end of the operating table.

[0009] Preferably, the top end of the operating table is fixedly connected with the bidirectional guide rail through a support plate. The positioning sliding seat on the other side is fixedly connected with two control suction cups for sucking the protection board through a suspension plate. The side wall of the electric control clamping rod is fixedly connected with the voltmeter.

[0010] Preferably, the voltage measuring component is composed of a plurality of double-sector gears, adjusting gears and voltage measuring telescopic guide rods. A detection box is fixedly connected to the side wall of the electric control clamping rod. A plurality of driving motors are fixedly connected to the inner end face of the detection box. The output end of the driving motor is fixedly connected with the double-sector gear through a driving shaft.

[0011] Preferably, the plurality of double-sector gears and the plurality of adjusting gears are arranged in an interlaced straight line. The tooth surfaces of the double-sector gears are respectively meshed with the adjusting gears on both sides. The bottom end of the adjusting gear is fixedly connected with the top end of the voltage measuring telescopic guide rod. The voltage measuring telescopic guide rod is in threaded connection with the bottom end of the detection box. The voltmeter is electrically connected with the plurality of voltage measuring telescopic guide rods respectively. The adjusting gear is rotatably connected with the inner end face of the detection box through a collar. The collar is arranged outside the voltage measuring telescopic guide rod.

[0012] Preferably, the two blocking electromagnetic plates are respectively arranged on both sides of the welding isolation seat. A plurality of limiting grooves are opened on the welding isolation seat. A plurality of fine holes are respectively opened on both sides of the limiting grooves on the welding isolation seat.

[0013] Preferably, an electric control guide rail is fixedly connected to the outer side wall of the partition welding seat, a plurality of isolation sliding seats are slidably connected to the outer side wall of the electric control guide rail, and two limit partition rods are rotatably connected to the top of the isolation sliding seat through an electric control rotating seat.

[0014] Preferably, the insulation assembly is composed of a plurality of glue injection cone heads and drying air discs. Miniature air pumps are fixedly connected to both ends of the transition cover. A glue storage box is fixedly connected to the outer side wall of one side of the transition cover, and a plurality of voltage dividing cavities are fixedly connected to the outer side wall of the other side of the transition cover.

[0015] Preferably, the glue injection cone head communicates with the glue storage box through the partition welding seat on one side, the drying air disc communicates with the voltage dividing cavity through the partition welding seat on the other side, and the voltage dividing cavity communicates with the miniature air pump.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. Through the setting of the pressure measuring assembly and the voltmeter, the present solution can use the pressure measuring telescopic guide rod to descend and rise one by one, quickly complete the voltage measurement of each contact of the collected wire after welding, which is more efficient and accurate than the current method of using a touch pen to measure each contact of the collected wire at small intervals, ensure the normal voltage of the collected wire after welding, and avoid damage to the components in the protection board subsequently.

[0018] 2. Through the setting of the blocking electromagnetic plate and the partition welding seat, the present solution can generate a dynamic damping force by using the controllable magnetic field of the blocking electromagnetic plate, and combine with air flow adsorption to form a "magnetic and gas dual-field stable control", greatly reducing the swing amplitude of the welding copper ring of the lightweight collected wire, effectively solving the problem of micro-spacing copper wire winding, and making the subsequent welding of the battery assembly and the collected wire more efficient and reliable.

[0019] 3. Through the setting of the insulation assembly, the present solution can use the glue injection and air drying collaborative operation unit to achieve zero-interval connection between the insulation protection and the welding process. The curing time of the protection layer is faster than that of the traditional process, completely eliminating the risk of exposure after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of a welding platform for manufacturing a lithium battery pack proposed by the present invention;

[0021] Figure 2 is an assembly drawing of a welding platform for manufacturing a lithium battery pack proposed by the present invention;

[0022] Figure 3 is Figure 2 the enlarged view of part A in

[0023] Figure 4 is a structural schematic diagram of the positions of two blocking electromagnetic plates in a welding platform for manufacturing a lithium battery pack proposed by the present invention;

[0024] Figure 5 Schematic diagram of the structure of the conversion seat in the open state of rotation in a welding platform for manufacturing a lithium battery pack proposed by the present invention;

[0025] Figure 6 It is Figure 5 An enlarged view of part B in

[0026] Figure 7 It is Figure 5 An enlarged view of part C in

[0027] Figure 8 Schematic diagram of the structure of multiple limiting partition rods in a welding platform for manufacturing a lithium battery pack proposed by the present invention;

[0028] Figure 9 Schematic diagram of the structure of the pressure measuring component in a welding platform for manufacturing a lithium battery pack proposed by the present invention;

[0029] Figure 10 Assembly drawing of the partition welding seat, transition cover and conversion seat in a welding platform for manufacturing a lithium battery pack proposed by the present invention.

[0030] In the figure: 1, operating table; 2, bidirectional guide rail; 3, battery assembly; 4, acquisition cable; 5, protection board; 6, positioning seat; 7, bidirectional electric control push rod; 8, positioning concave plate; 9, positioning sliding seat; 10, control suction cup; 11, electric control clamping rod; 12, voltmeter; 13, detection box; 14, drive motor; 15, double sector gear; 16, adjustment gear; 17, pressure measuring telescopic guide rod; 18, welding sliding seat; 19, hydraulic push rod; 20, blocking electromagnetic plate; 21, partition welding seat; 22, transition cover; 23, electric control hinge; 24, conversion seat; 25, electric control guide rail; 26, isolation sliding seat; 27, limiting partition rod; 28, micro air pump; 29, control manipulator; 30, welding robotic arm; 31, glue storage box; 32, glue injection cone head; 33, voltage dividing cavity; 34, drying air disk. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] Example, referring to Figures 1 to 10 , a welding platform for manufacturing a lithium battery pack, includes an operating table 1 for placing battery components 3 and two bidirectional guide rails 2 for adjusting the collection wiring harness 4 and the protection board 5. A positioning seat 6 is provided on the operating table 1, and a positioning component for positioning the battery components 3 is provided on the positioning seat 6. Two positioning sliding seats 9 and two welding sliding seats 18 are respectively connected to the upper and lower side walls of the bidirectional guide rail 2. The positioning sliding seat 9 on one side is connected with an electric control clamping rod 11 through a hanging plate. A voltmeter 12 is provided on the side wall of the electric control clamping rod 11, and a voltage measuring component for detecting the voltage on each contact after the collection wiring harness 4 is welded is provided on the side wall of the voltmeter 12;

[0034] The collection wiring harness 4 in this solution is as Figure 8 shown, and is composed of a part inserted into the protection board 5, a plurality of copper wires, and welding copper rings connected to the ends of the copper wires;

[0035] Further, the positioning component is composed of two bidirectional electric control push rods 7 and two positioning concave plates 8. A sliding groove is provided at the top end of the operating table 1. The inner side wall of the sliding groove is slidably connected to the positioning seat 6. The top end of the positioning seat 6 is fixedly connected to the bidirectional electric control push rod 7 through a fixing plate. The two output ends of the bidirectional electric control push rod 7 are respectively fixedly connected to the ends of the two positioning concave plates 8. A protective cover is assembled at the top end of the operating table 1. The top end of the operating table 1 is fixedly connected to the bidirectional guide rail 2 through a support plate. On the other side, the positioning slide seat 9 is fixedly connected with two control suction cups 10 for sucking the protection plate 5 through a hanging plate. The side wall of the electric control clamping rod 11 is fixedly connected with a voltmeter 12. The pressure measuring component is composed of a plurality of double-sector gears 15, adjusting gears 16 and pressure measuring telescopic guide rods 17. The side wall of the electric control clamping rod 11 is fixedly connected with a detection box 13. The inner end surface of the detection box 13 is fixedly connected with a plurality of driving motors 14. The output end of the driving motor 14 is fixedly connected to the double-sector gear 15 through a driving shaft. The plurality of double-sector gears 15 and the plurality of adjusting gears 16 are arranged in an interlaced straight line. The tooth surfaces of the double-sector gears 15 are respectively meshed with the adjusting gears 16 on both sides. The bottom end of the adjusting gear 16 is fixedly connected to the top end of the pressure measuring telescopic guide rod 17. The pressure measuring telescopic guide rod 17 is threadedly connected to the bottom end of the detection box 13. The voltmeter 12 is electrically connected to the plurality of pressure measuring telescopic guide rods 17 respectively. The adjusting gear 16 is rotatably connected to the inner end surface of the detection box 13 through a collar. The collar is arranged outside the pressure measuring telescopic guide rod 17;

[0036] It should be noted that: remove the protective cover assembled on the operating table 1, then slide the positioning seat 6 out of the operating table 1. Subsequently, the staff places the battery assembly 3 to be welded between the two positioning concave plates 8 on the positioning seat 6, and uses the bidirectional electric control push rod 7 to pull the two positioning concave plates 8 to limit and position the battery assembly 3. Then slide the positioning seat 6 into the set position in the operating table 1 for fixation. At the same time, the positioning slide seats 9 on the bidirectional guide rail 2 slide in both end directions respectively. Limiting conveyor belts are arranged on both sides of the operating table 1 to convey the acquisition wiring harness 4 and the protection plate 5 respectively. Then the electric control clamping rod 11 will clamp and limit the acquisition wiring harness 4, and the control suction cup 10 will suck the protection plate 5. Subsequently, move the acquisition wiring harness 4 to directly above the partition welding seat 21;

[0037] Subsequently, the control manipulator 29 is used to grasp and limit the welded copper ring of the acquisition cable 4 that enters the partition welding seat 21. Then, the conversion seat 24 is flipped downward by the electric control hinge 23. The control manipulator 29 places the welded copper ring on the pole column to be welded on the battery assembly 3. Then, welding is performed by the welding robotic arm 30. After the welding is completed, the drive motor 14 on the total negative electrode side of the battery assembly 3 is started. The drive motor 14 will drive the double-sector gear 15 to rotate one circle, thereby driving the adjustment gears 16 on both sides to rotate in the opposite direction. The rotation of the adjustment gear 16 will synchronously drive the two pressure-measuring telescopic guide rods 17 to rotate threadedly on the detection box 13 (where the thread directions of two adjacent pressure-measuring telescopic guide rods 17 are opposite, and the pressure-measuring telescopic guide rod 17 will expand and contract when moving up and down in threaded rotation. The collar supports the rotation of the adjustment gear 16 to ensure the meshing state of the double-sector gear 15 and the adjustment gear 16). As a result, the two pressure-measuring telescopic guide rods 17 move downward and press on the contacts on the acquisition cable 4. The voltage of the first single battery of the battery assembly 3 is measured by the voltmeter 12. Subsequently, the second drive motor 14 is started to drive the second double-sector gear 15 to rotate one circle in the opposite direction, synchronizing the above operation process. Then, the second pressure-measuring telescopic guide rod 17 is driven by the reverse rotation and moves upward to reset, while the third pressure-measuring telescopic guide rod 17 moves downward during the rotation, realizing the conduction of the first pressure-measuring telescopic guide rod 17 and the third pressure-measuring telescopic guide rod 17 into the circuit to measure the voltages of the first two single batteries of the battery assembly 3. Follow the above operation for subsequent voltage tests one by one;

[0038] The benefits based on the above are as follows: In this way, the voltage measurement of each contact of the acquisition cable 4 after welding can be quickly completed by the successive lowering and rising of the pressure-measuring telescopic guide rod 17, which is more efficient and accurate than the current method of using a touch pen to measure each contact of the acquisition cable 4 at small intervals, ensuring the normal voltage of the acquisition cable 4 after welding and avoiding damage to the components in the protection board 5 in the future;

[0039] The bottom end of the welding slide 18 is connected to the blocking electromagnetic plate 20 through the hydraulic push rod 19, and the output end of the hydraulic push rod 19 is connected to the partition welding seat 21 through the mounting plate;

[0040] Furthermore, the two blocking electromagnetic plates 20 are respectively arranged on both sides of the partition welding seat 21. The partition welding seat 21 is provided with a plurality of limiting grooves, and a plurality of fine holes are respectively opened on both sides of the limiting grooves of the partition welding seat 21. The outer side wall of the partition welding seat 21 is fixedly connected with the electric control guide rail 25, and a plurality of isolation slides 26 are slidably connected to the outer side wall of the electric control guide rail 25. The top end of the isolation slide 26 is rotatably connected with two limiting partition rods 27 through the electric control rotating seat. Among them, the electric control rotating seat can control the rotation of the limiting partition rod 27 on the isolation slide 26. This is a conventional technical means and will not be elaborated here;

[0041] It should be noted that: The two blocking electromagnetic plates 20 are energized so that the welding copper rings at the end of the acquisition wiring harness 4 are placed between the magnetic fields. Subsequently, by sliding the positioning slider 9, the multiple welding copper rings on the acquisition wiring harness 4 are controlled to swing. At the same time, multiple micro air pumps 28 are synchronously started to suck air, so that the welding copper rings at the end of the acquisition wiring harness 4 are subjected to a downward air flow suction force. When the welding copper rings at the end of the acquisition wiring harness 4 swing in the magnetic field, as a conductor moving in the magnetic field, the free electrons inside it are affected by the Lorentz force due to cutting the magnetic induction line, forming a closed loop current (i.e., eddy current). And the eddy current itself will generate a magnetic field. According to Lenz's law, the direction of this magnetic field always hinders the change of the original magnetic field (the magnetic fields of the blocking electromagnetic plates 20 and the welding copper rings are different), generating an Ampere force opposite to the movement direction of the welding copper ring, forming a resistance, so that the relatively light welding copper rings at the end of the acquisition wiring harness 4 slowly swing between the two blocking electromagnetic plates 20, facilitating the separation of the connecting copper wires with a small interval on the acquisition wiring harness 4 from each other during the slow swing process. And after the positioning slider 9 drives the acquisition wiring harness 4 to move to the set position and stop, the subsequent air flow suction force will tighten the copper wires on the acquisition wiring harness 4, making the copper wires in a vertical state. Subsequently, multiple isolation sliders 26 on the electric control guide rail 25 are controlled to slide to both sides of the acquisition wiring harness 4, and the limit partition rods 27 are controlled to rotate to both sides of the welding copper rings of the acquisition wiring harness 4, and then the welding copper rings are limited and moved into different limit grooves on the partition welding seat 21. During this process, the hydraulic push rod 19 gradually contracts to drive the partition welding seat 21 to move upward for butt joint to compensate for the distance;

[0042] Based on the above advantages: This can utilize the obstruction of the magnetic field swing of the welding copper rings on the acquisition wiring harness 4 in the blocking electromagnetic plates 20 to reduce the swing amplitude of the relatively light welding copper rings, and with the air flow suction force below, keep the copper wires on the acquisition wiring harness 4 in a vertically downward state, avoiding the entanglement of the copper wires with an extremely small interval on the acquisition wiring harness 4 before welding, making the subsequent welding of the battery assembly 3 and the acquisition wiring harness 4 more efficient and reliable;

[0043] The bottom end of the partition welding seat 21 is connected with a transition cover 22. The bottom end of the transition cover 22 is connected with a conversion seat 24 through an electric control hinge 23. Multiple control manipulators 29 and welding robotic arms 30 are respectively connected to the inner end faces of the two conversion seats 24. An insulating component is arranged in the two transition covers 22. Among them, the control manipulators 29 and the welding robotic arms 30 are common robotic arm structures in the prior art and will not be elaborated here;

[0044] Further, the insulation assembly is composed of a plurality of glue injection cone heads 32 and a drying air disk 34. Miniature air pumps 28 are fixedly connected to both ends of the transition cover 22. A glue storage box 31 is fixedly connected to the outer side wall of one side of the transition cover 22, and a plurality of pressure dividing chambers 33 are fixedly connected to the outer side wall of the other side of the transition cover 22. The glue injection cone heads 32 communicate with the glue storage box 31 through the partition welding seat 21 on one side, the drying air disk 34 communicates with the pressure dividing chambers 33 through the partition welding seat 21 on the other side, and the pressure dividing chambers 33 communicate with the miniature air pumps 28;

[0045] It should be noted that: after the welding of a single pole column is completed, the voltage measurement of the contacts on the acquisition wiring 4 can be carried out. After the measurement is qualified, the insulation protection of the welding part can be carried out synchronously. The glue injection cone head 32 will apply insulating glue to the welding part. At the same time, the miniature air pump 28 will introduce air flow into the drying air disk 34 through the pressure dividing chamber 33 to quickly dry the applied insulating glue;

[0046] Based on the above benefits: this can synchronize the welding and the insulation treatment after welding, enabling the insulation protection of the battery assembly 3 after welding to be carried out in a timely manner, avoiding the exposure of the metal after welding and preventing the occurrence of a short circuit situation;

[0047] Note: Faraday's law of electromagnetic induction: The relative motion between a conductor and a magnetic field causes a change in magnetic flux, thereby generating an induced electromotive force and current inside the conductor.

[0048] When the present invention is in use, the protective cover assembled on the operating table 1 is removed, and then the positioning seat 6 is slid out of the operating table 1. Subsequently, the staff places the battery assembly 3 to be welded between the two positioning concave plates 8 on the positioning seat 6, uses the bidirectional electric control push rod 7 to pull the two positioning concave plates 8 to limit and position the battery assembly 3, and then slides the positioning seat 6 into the set position inside the operating table 1 for fixation. At the same time, the positioning sliders 9 on the bidirectional guide rails 2 slide in opposite directions. Limit conveyor belts are respectively arranged on both sides of the operating table 1 to convey the acquisition wiring 4 and the protection board 5 respectively. Then, the electric control clamping rod 11 will clamp and limit the acquisition wiring 4, and the control suction cup 10 will suck the protection board 5, and then move the acquisition wiring 4 to directly above the partition welding seat 21;

[0049] Energize two blocking electromagnetic plates 20 so that the welding copper rings at the end of the acquisition cable 4 are placed between the magnetic fields. Subsequently, by sliding the positioning slider 9, control the swinging of multiple welding copper rings on the acquisition cable 4. At the same time, synchronously start multiple micro air pumps 28 to suck air, so that the welding copper rings at the end of the acquisition cable 4 are subjected to a downward air flow suction force. When the welding copper rings at the end of the acquisition cable 4 swing in the magnetic field, as conductors moving in the magnetic field, the free electrons inside them are affected by the Lorentz force due to cutting the magnetic induction lines, forming a closed loop current (i.e., eddy current). And the eddy current itself will generate a magnetic field. According to Lenz's law, the direction of this magnetic field always hinders the change of the original magnetic field, generating an Ampere force opposite to the moving direction of the welding copper ring, forming a resistance, so that the relatively light welding copper rings at the end of the acquisition cable 4 swing slowly between the two blocking electromagnetic plates 20, facilitating the separation of the connecting copper wires with a small interval on the acquisition cable 4 during the slow swinging process. Then, let the positioning slider 9 drive the acquisition cable 4 to move to the set position and stop. Subsequently, the subsequent air flow suction force will tighten the copper wires on the acquisition cable 4, making the copper wires in a vertical state. Then, control multiple isolation sliders 26 on the electric control guide rail 25 to slide to both sides of the acquisition cable 4, control the limiting partition rod 27 to rotate to both sides of the welding copper rings of the acquisition cable 4, and then limit the movement of the welding copper rings to different limiting grooves on the welding isolation seat 21 (i.e., use the limiting partition rod 27 to limit the movement of the welding copper rings and further limit them at the limiting grooves on the welding isolation seat 21). During this process, the hydraulic push rod 19 gradually contracts to drive the welding isolation seat 21 to move upward for butt joint to compensate for the distance. In this way, the magnetic field swing of the welding copper rings on the acquisition cable 4 in the blocking electromagnetic plates 20 can be blocked, reducing the swinging amplitude of the relatively light welding copper rings. Coupled with the downward air flow suction force below, keep the copper wires on the acquisition cable 4 in a vertically downward state, avoiding the winding of the copper wires with extremely small intervals on the acquisition cable 4 before welding, making the subsequent welding of the battery assembly 3 and the acquisition cable 4 more efficient and reliable. Compared with the prior art, during the mechanical operation process, the swinging amplitude of the copper wires on the acquisition cable 4 is relatively large, which is easy to entangle with each other, affecting the subsequent one-by-one welding of the acquisition cable 4 and the battery assembly 3. It has a better operation process, ensuring that the welding can be carried out efficiently and safely;

[0050] Subsequently, the control manipulator 29 is used to grasp and limit the welded copper ring of the acquisition wiring harness 4 entering the partition welding seat 21. Then, the conversion seat 24 is turned downward by the electric control hinge 23. Then, the control manipulator 29 places the welded copper ring on the pole column to be welded on the battery assembly 3. Then, welding is carried out by the welding robotic arm 30. After the welding is completed, the drive motor 14 on the total negative electrode side of the battery assembly 3 is started. Then, the drive motor 14 will drive the double-sector gear 15 to rotate one circle, and then drive the adjusting gears 16 on both sides to rotate in the opposite direction. The rotation of the adjusting gear 16 will synchronously drive the two pressure-measuring telescopic guide rods 17 to rotate threadedly on the detection box 13 (the thread directions on two adjacent pressure-measuring telescopic guide rods 17 are opposite, and the pressure-measuring telescopic guide rod 17 will expand and contract when moving up and down in threaded rotation. The collar supports the rotation of the adjusting gear 16 to ensure the meshing state of the double-sector gear 15 and the adjusting gear 16). Then, the two pressure-measuring telescopic guide rods 17 move downward and press on the contacts on the acquisition wiring harness 4. The voltage of the first single battery of the battery assembly 3 is measured by the voltmeter 12. Subsequently, the second drive motor 14 is started to drive the second double-sector gear 15 to rotate one circle in the opposite direction, synchronizing the above operation process. Then, the second pressure-measuring telescopic guide rod 17 is driven by the reverse rotation and moves upward to reset, while the third pressure-measuring telescopic guide rod 17 moves downward during the rotation, realizing the introduction of the first pressure-measuring telescopic guide rod 17 and the third pressure-measuring telescopic guide rod 17 into the circuit to measure the voltages of the first two single batteries of the battery assembly 3. Subsequently, according to the above operation, voltage tests are carried out one by one. In this way, the voltage measurement of each contact of the acquisition wiring harness 4 after welding can be quickly completed by the successive lowering and rising of the pressure-measuring telescopic guide rods 17, which is more efficient and accurate than the current method of using a touch pen to measure each contact of the acquisition wiring harness 4 at small intervals, ensuring the normal voltage of the acquisition wiring harness 4 after welding and avoiding damage to the components in the protection board 5 in the future;

[0051] After the welding of a single pole column is completed, the voltage measurement of the contacts on the acquisition wiring harness 4 can be carried out. After the measurement is qualified, the insulation protection of the welding part can be carried out synchronously. The glue injection cone 32 will apply insulating glue to the welding part. At the same time, the micro air pump 28 will pass air into the drying air disc 34 through the pressure dividing cavity 33 to quickly dry the applied insulating glue. In this way, the welding and the insulation treatment after welding can be carried out synchronously, enabling the timely insulation protection of the battery assembly 3 after welding and avoiding the exposure of the metal after welding, resulting in a short circuit situation.

[0052] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A welding platform for manufacturing lithium battery packs, comprising an operating table (1) for placing battery components (3) and two bidirectional guide rails (2) for adjusting the collection cable (4) and the protection plate (5), characterized in that: The operating table (1) is provided with a positioning seat (6), and a positioning assembly for positioning the battery assembly (3) is provided on the positioning seat (6); the upper side wall and the lower side wall of the two-way guide rail (2) are respectively connected to two positioning slides (9) and two welding slides (18); the positioning slide (9) located on one side is connected to an electric control clamping rod (11) through a hanging plate; a voltmeter (12) is provided on the side wall of the electric control clamping rod (11); and a pressure measuring assembly for detecting the voltage on each contact of the collection cable (4) after welding is provided on the side wall of the voltmeter (12); The bottom end of the welding slide (18) is connected to a blocking electromagnetic plate (20) via a hydraulic push rod (19); the output end of the hydraulic push rod (19) is connected to a welding isolation seat (21) via a mounting plate; the bottom end of the welding isolation seat (21) is connected to a transition cover (22); the bottom end of the transition cover (22) is connected to a conversion seat (24) via an electrically controlled hinge (23); a plurality of control manipulators (29) and welding manipulators (30) are respectively connected to the inner end surfaces of the two conversion seats (24); and insulating components are arranged inside the two transition covers (22).

2. A welding platform for manufacturing lithium battery packs according to claim 1, characterized in that: The positioning assembly is composed of two bidirectional electric control push rods (7) and two positioning concave plates (8). A sliding groove is provided at the top of the operating table (1). The inner side wall of the sliding groove is slidably connected to the positioning seat (6). The top of the positioning seat (6) is fixedly connected to the bidirectional electric control push rod (7) through a fixing plate. The two output ends of the bidirectional electric control push rod (7) are respectively fixedly connected to the ends of the two positioning concave plates (8). A protective cover is installed at the top of the operating table (1).

3. A welding platform for manufacturing lithium battery packs according to claim 1, characterized in that: The top of the operating table (1) is fixedly connected to the two-way guide rail (2) via a support plate, and the positioning slide (9) on the other side is fixedly connected to two control suction cups (10) for sucking the protection plate (5) via a hanging plate, and the side wall of the electric control clamping rod (11) is fixedly connected to the voltmeter (12).

4. A welding platform for manufacturing lithium battery packs according to claim 1, characterized in that: The pressure measuring assembly is composed of a plurality of double-sector gears (15), an adjustment gear (16) and a pressure measuring telescopic guide rod (17); the side wall of the electric control clamping rod (11) is fixedly connected to a detection box (13); the inner end surface of the detection box (13) is fixedly connected to a plurality of drive motors (14); the output end of the drive motor (14) is fixedly connected to the double-sector gear (15) via a drive shaft.

5. A welding platform for manufacturing lithium battery packs according to claim 4, characterized in that: The plurality of double sector gears (15) and the plurality of adjustment gears (16) are arranged in a mutually staggered straight line, the tooth surfaces of the double sector gears (15) are respectively meshed with the adjustment gears (16) on both sides, the bottom end of the adjustment gear (16) is fixedly connected to the top end of the pressure measuring telescopic guide rod (17), the pressure measuring telescopic guide rod (17) is threadedly connected to the bottom end of the detection box (13), the voltmeter (12) is respectively electrically connected to the plurality of pressure measuring telescopic guide rods (17), the adjustment gear (16) is rotatably connected to the inner end surface of the detection box (13) through a collar, and the collar is arranged on the outer side of the pressure measuring telescopic guide rod (17).

6. A welding platform for manufacturing lithium battery packs according to claim 1, characterized in that: The two blocking electromagnetic plates (20) are respectively arranged on both sides of the welding isolation seat (21); a plurality of limiting grooves are provided on the welding isolation seat (21); and a plurality of fine holes are respectively provided on both sides of the limiting grooves of the welding isolation seat (21).

7. A welding platform for manufacturing lithium battery packs according to claim 1, characterized in that: The outer wall of the welding isolation seat (21) is fixedly connected to an electric control guide rail (25), the outer wall of the electric control guide rail (25) is slidably connected to a plurality of isolation slide seats (26), and the top of the isolation slide seat (26) is rotatably connected to two limit isolation rods (27) via an electric control rotating seat.

8. A welding platform for manufacturing lithium battery packs according to claim 1, characterized in that: The insulating component is composed of a plurality of glue injection cones (32) and a drying air disk (34); both ends of the transition cover (22) are fixedly connected to a micro air pump (28); an outer wall of the transition cover (22) on one side is fixedly connected to a glue storage box (31); and an outer wall of the transition cover (22) on the other side is fixedly connected to a plurality of pressure-dividing chambers (33).

9. A welding platform for manufacturing lithium battery packs according to claim 8, characterized in that: The glue injection cone head (32) is communicated with the glue storage box (31) through the welding isolation seat (21) on one side, the drying air disk (34) is communicated with the pressure dividing chamber (33) through the welding isolation seat (21) on the other side, and the pressure dividing chamber (33) is communicated with the micro air pump (28).

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