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CN-115740911-B - Spot welding device for lithium ion battery

CN115740911BCN 115740911 BCN115740911 BCN 115740911BCN-115740911-B

Abstract

The invention discloses a spot welding device for a lithium ion battery, which comprises a processing table, wherein the top of the processing table is fixedly connected with a fixed support, one side of the fixed support is provided with a sliding support, the inside of the sliding support is connected with a spot welding mechanism in a sliding manner through a sliding block, one side of the fixed support is provided with a first ejector rod, the bottom of the first ejector rod is provided with a connecting support, the bottom of the connecting support is provided with a positioning device, the positioning device comprises a top cover, the top cover is provided with an arc-shaped structure, and a limiting sleeve is arranged at the bottom of the top cover, and the inner side of the limiting sleeve is rotationally connected with a rotating plate through a bearing. This lithium ion battery spot welding device can prevent that nickel piece and lithium ion battery polar plate department from taking place the dislocation condition, improves the welding efficiency of nickel piece and lithium ion battery polar plate, need not the manual work and lasts handheld nickel piece, improves the security.

Inventors

  • ZHOU PEIRONG
  • WANG HONGDONG
  • ZHOU LUBIN

Assignees

  • 航天锂电科技(江苏)有限公司

Dates

Publication Date
20260512
Application Date
20221125

Claims (5)

  1. 1. The utility model provides a lithium ion battery spot welding device, includes processing platform (1), its characterized in that: the top of the processing table (1) is fixedly connected with a fixed support (2), one side of the fixed support (2) is provided with a sliding support (3), the inside of the sliding support (3) is slidably connected with a spot welding mechanism (4) through a sliding block, one side of the fixed support (2) is provided with a first ejector rod (5), the bottom of the first ejector rod (5) is provided with a connecting support (6), and the bottom of the connecting support (6) is provided with a positioning device (7); the positioning device (7) comprises: the top cover (71) is provided with an arc-shaped structure and a limiting sleeve (72) arranged at the bottom of the top cover (71), the inner side of the limiting sleeve (72) is rotatably connected with a rotating plate (73) through a bearing, annular sliding tables (74) are arranged on two sides of the rotating plate (73), a limiting plate (75) is arranged on one side of the annular sliding tables (74), and a driving motor (76) is arranged on one side of the top cover (71); The sliding control rod (77), this sliding control rod (77) have the body of rod, and set up control sleeve (78) in the outside of sliding control rod (77), arc reset spring (710) is installed to one side of control sleeve (78), one end fixedly connected with second ejector pin (711) of sliding control rod (77), clamping device (79) are installed to one end that second ejector pin (711) was kept away from to sliding control rod (77), the top of stop collar (72) and the bottom fixed connection of top cap (71), the output of driving motor (76) passes through axis of rotation and rotor plate (73) fixed connection, one side that driving motor (76) was kept away from to rotor plate (73) is rotated through the runing rest and is connected with top cap (71), control sleeve (78) cover is established in the outside of sliding control rod (77) and is fixedly connected with sliding control rod (77), one end that control sleeve (78) was kept away from to arc reset spring (710) and the outside fixed connection of top cap (71), one end that sliding control rod (77) kept away from sliding control rod (74) extends to annular slip table (74) and is kept away from annular slip table (71), slip table (74) and top cap (71) are held in advance, slip table (71), stop device (792) is installed to one side of sliding plate (791), the bottom fixedly connected with device frame (793) of sliding plate (791), the inner wall of device frame (793) is connected with rotatory roller (794) through the bearing rotation, the outside cover of rotatory roller (794) is equipped with roller bearing (795), recess (796) are seted up to the position that the bottom of sliding plate (791) is close to device frame (793), internally mounted of recess (796) has electric telescopic handle (797), the bottom fixedly connected with arc stripper plate (798) of electric telescopic handle (797), friction pad (799) are installed to the bottom of arc stripper plate (798), stop device (792) are including strengthening sleeve (7921), spout (7922) are seted up to the inner wall of strengthening sleeve (7921), the inside of spout (7922) is through slider (7923) sliding connection has moving post (7924), one end fixedly connected with spring (7925) of moving post (7924), one end fixedly connected with arc curb plate (7926).
  2. 2. The spot welding device for the lithium ion battery according to claim 1, wherein one side of the sliding plate (791) close to the limiting device (792) is fixedly connected with the end part of the sliding control rod (77), the rolling shaft (795) is fixedly connected with the rotating roller (794), and a rubber strip is fixedly connected to the outer side of the rolling shaft (795).
  3. 3. The spot welding device for lithium ion batteries according to claim 1, wherein one end of the electric telescopic rod (797) close to the arc-shaped extrusion plate (798) extends to the bottom of the device frame (793), and the outer side of the roller (795) extends to the bottom of the device frame (793).
  4. 4. The spot welding device for the lithium ion battery according to claim 1, wherein the sliding grooves (7922) are arranged in two groups and symmetrically distributed on two sides of the inner wall of the reinforcing sleeve (7921), two ends of the moving column (7924) penetrate through the reinforcing sleeve (7921), and the limiting side plate (7926) is arranged at one end, far away from the arc-shaped spring (7925), of the moving column (7924).
  5. 5. The spot welding device for the lithium ion battery according to claim 1, wherein a friction adhesive tape is fixedly connected to one side, far away from the movable column (7924), of the limiting side plate (7926), and a plurality of groups of friction adhesive tapes are arranged.

Description

Spot welding device for lithium ion battery Technical Field The invention relates to the technical field of lithium ion battery production, in particular to a lithium ion battery spot welding device. Background A lithium ion battery is a secondary battery (rechargeable battery) that operates mainly by means of lithium ions moving between a positive electrode and a negative electrode. In the charge and discharge process, li+ is inserted and removed back and forth between the two electrodes, wherein Li+ is removed from the positive electrode during charge, is inserted into the negative electrode through the electrolyte, and is in a lithium-rich state during discharge, and the reverse is carried out during discharge. Lithium-based batteries are classified into lithium batteries and lithium ion batteries. Lithium ion batteries are used for mobile phones and notebook computers, and are commonly known as lithium batteries. Batteries generally employ materials containing lithium as electrodes, which are representative of modern high performance batteries. The lithium battery is a battery which uses lithium metal or lithium alloy as a negative electrode material and uses nonaqueous electrolyte solution, and the lithium metal has very high requirements on environment because of the very active chemical characteristics of the lithium metal. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become mainstream, and many daily electrical appliances can see the figure of lithium batteries, and during the production of lithium ion batteries, nickel plates need to be welded on the polar plates of lithium ion batteries by a spot welder. The existing device needs to continuously hold the nickel sheet manually to weld the nickel sheet on the pole plate of the lithium ion battery, the situation that dislocation occurs at the positions of the nickel sheet and the pole plate of the lithium ion battery cannot be prevented, and the welding efficiency of the nickel sheet and the pole plate of the lithium ion battery is reduced. Disclosure of Invention In order to solve the technical problems, the invention provides a spot welding device for a lithium ion battery, which comprises a processing table, wherein the top of the processing table is fixedly connected with a fixed support, one side of the fixed support is provided with a sliding support, the inside of the sliding support is connected with a spot welding mechanism in a sliding way through a sliding block, one side of the fixed support is provided with a first ejector rod, the bottom of the first ejector rod is provided with a connecting support, and the bottom of the connecting support is provided with a positioning device; The positioning device comprises: the top cover is provided with an arc-shaped structure and a limit sleeve arranged at the bottom of the top cover, the inner side of the limit sleeve is rotationally connected with a rotating plate through a bearing, annular sliding tables are arranged on two sides of the rotating plate, an arc-shaped reset spring drives a first ejector rod to cling to the side face of the annular sliding table, the rotating amplitude of the annular sliding table can be controlled, the distance between the first ejector rod and the top cover is adjusted, when the clamped lithium ion battery and a nickel sheet are wider, the distance between the first ejector rod and the top cover is smaller, otherwise, the distance between the first ejector rod and the top cover is larger, the lithium ion battery with the same size and the nickel sheet can be matched, the adaptability and the suitability of the device are improved, a limit plate is arranged on one side of the annular sliding table, and a driving motor is arranged on one side of the top cover; The sliding control rod is provided with a second rod body and a control sleeve arranged on the outer side of the sliding control rod, an arc-shaped reset spring is arranged on one side of the control sleeve, one end of the sliding control rod is fixedly connected with a second ejector rod, one end of the sliding control rod, which is far away from the second ejector rod, is provided with a clamping device, a driving motor is started, the driving motor drives a rotating plate to rotate through a rotating shaft, the arc-shaped reset spring continuously pushes the sliding control rod and the second ejector rod tightly against the side surface of the annular sliding table, when the annular sliding table rotates along with the rotating plate, the second ejector rod gradually moves to the inclined surface of the annular sliding table, at the moment, the arc-shaped reset spring drags the sliding control rod through self elasticity to drive the clamping device to slide towards the inside of the top cover, and two groups of clamping devices simultaneously align nickel pieces covered on a lithium ion battery polar plate with t