CN108326408A - 4 Resistance Welding connection devices of dual power supply of compatible multiple power battery modules - Google Patents

Abstract

The invention discloses a kind of 4 Resistance Welding connection devices of dual power supply of compatible multiple power battery modules, which is mainly made of the first welding head, backboard, sliding block, the second welding head, guide rail, Z axis straight line module, X-axis straight line module, Y-axis straight line module and module support plate；It is fixedly installed module support plate on Y-axis straight line module, Z axis straight line module is installed on X-axis straight line module, backboard is fixedly installed on Z axis straight line module, first welding head and guide rail are installed on backboard, sliding block is provided on guide rail, it is provided with the second welding head on sliding block, the second welding head is in sliding block upper edge X to running fix.Existing welding beat can be promoted one times by the present invention, to meet the needs of large-scale production production capacity.The present invention can be also adjusted according to the spacing of the design butt welding machine head of different modules, to improve flexibility and the compatibility of automatic production line, to reduce equipment input cost.

Description

Dual-power four-point resistance welding device compatible with multiple power battery modules

technical field

The invention belongs to the technical field of resistance welding devices, and in particular relates to a dual-power four-point resistance welding device compatible with multiple power battery modules.

Background technique

For higher energy, it is usually necessary to connect dozens or even hundreds of batteries in series and parallel to form a module, and then to form a battery pack by connecting multiple modules in series and parallel. The size and shape of the design are different. Resistance welding is the key process for manufacturing cylindrical battery modules in the existing technology. The mainstream welding method in the market is single-power parallel welding. Usually, one battery cell welds 8 points, and the cycle time takes 4.8s to 6s. Existing This single-power parallel welding method in the technology is too inefficient in automatic production, and usually requires the investment of multiple equipment, with high investment costs, which cannot meet the needs of industrialization development.

Contents of the invention

In order to overcome the deficiencies in the prior art, the present invention provides a dual-power four-point resistance welding device that can meet the demands of large-scale production capacity and is compatible with multiple power battery modules.

The present invention is achieved through the following technical solutions: a dual-power four-point resistance welding device compatible with multiple power battery modules, the dual-power four-point resistance welding device is mainly composed of a first welding head, a back plate, The slider, the second welding head, the guide rail, the Z-axis linear module, the X-axis linear module, the Y-axis linear module and the module carrier board; the module carrier board is fixedly installed on the Y-axis linear module, The Z-axis linear module is installed on the X-axis linear module, the back plate is fixed on the Z-axis linear module, the back plate moves along the Z direction with the Z-axis linear module, and the first welding head is installed on the back plate and a guide rail, a slide block is arranged on the guide rail, a second welding head is arranged on the slide block, and the second welding head is moved and positioned along the X direction on the slide block.

The first welding head is composed of a pressure sensor, a welding needle clamping block and a welding needle from top to bottom. The clamping block is connected to the first welding power source.

The second welding head is composed of a pressure sensor, a welding needle clamping block and a welding needle from top to bottom, the pressure sensor is arranged on the top of the welding needle holding block, the welding needle is arranged on the bottom of the welding needle holding block, and A displacement cylinder is fixedly arranged on the block, and the second welding head is fixedly connected with the displacement cylinder.

The working principle of each part in the dual power supply four-point resistance welding welding device of the present invention is:

1. Welding needle: the main working part of the welding device, the welding current forms a circuit through the welding needle and the workpiece to be welded, and the resistance heat generated by the contact surface between the welding needle and the workpiece is used to melt the metal to form a nugget;

2. Welding pin clamping block: used to clamp the welding pin, connected with the positive and negative poles of the welding power supply, and can pass a large current;

3. The first welding head: mainly composed of welding needles, welding needle clamping blocks and pressure sensors, connected with the first welding power supply, and can be independently controlled;

4. Pressure sensor: used to detect the contact pressure between the welding needle electrode and the workpiece. When the welding pressure reaches 2kg, the welding power supply is triggered to ensure the contact resistance between the nickel sheet and the electrode sheet of the battery;

5. Back plate: The slider and the mounting plate of the two welding heads are fixed on the Z-axis linear module, which can realize Z-direction movement with the linear module;

6. Slider: used to fix the second welding head, the second welding head can be moved and positioned on the slider in the X direction, so as to adapt to the welding of battery modules with different cell spacing for different products;

7. Second welding head: mainly composed of pressure sensor, welding needle clamping block, welding needle, and displacement cylinder, connected with the second welding power supply, and can be independently controlled;

8. Displacement cylinder: installed on the slider, connected with the second welding head, used to move the second welding head in the Y direction, so as to adapt to the welding of battery modules with different cell spacings of the same product;

9. Welding head installation guide rail: used to fix the slider and adjust the distance between the second welding head and the first welding head in the X direction;

10. Z-axis linear module: used to install the backplane, the Z-axis linear module is installed on the X-axis linear module, so that the welding joint can realize Z-direction movement;

11. X-axis linear module: used to install Z-axis linear module, so that the welding joint can realize X-direction movement;

12. Y-axis linear module: used to drive the product to move in the Y direction;

13. Module carrier plate: used for module positioning and fixed on the Y-axis linear module.

The beneficial effect of the present invention is that: the present invention provides a four-point welding method with dual power sources, which can double the existing welding tempo, so as to meet the demand of large-scale production capacity. At the same time, the present invention also considers the collinear production of different products, such as 18650 battery modules and 21700 battery modules, and can adjust the spacing of welding heads according to the design of different modules, so as to improve the flexibility and compatibility of the automated production line performance, thereby reducing equipment investment costs. The invention is a dual-power four-point resistance welding device capable of meeting the demand for large-scale production capacity and compatible with multiple power battery modules.

Description of drawings

Fig. 1 is the structural representation of dual-power four-point resistance welding welding device of the present invention;

Fig. 2 is a partially enlarged view of part A-A in the dual-power four-point resistance welding welding device of the present invention;

Fig. 3 is the schematic diagram of the four-point welding current of dual power sources using the resistance welding welding device of the present invention;

In the figure: 1- welding needle; 2- welding needle clamping block; 3- the first welding head; 4- pressure sensor; Position cylinder; 9-guide rail; 10-Z-axis linear module; 11-X-axis linear module; 12-Y-axis linear module; 13-module carrier board.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 3, a dual-power four-point resistance welding device compatible with multiple power battery modules, the dual-power four-point resistance welding device mainly consists of a first welding head 3 and a back plate 5 , slider 6, second welding head 7, guide rail 9, Z-axis linear module 10, X-axis linear module 11, Y-axis linear module 12 and module carrier plate 13; the Y-axis linear module 12 A module carrier plate 13 is fixedly installed on the top, the Z-axis linear module 10 is installed on the X-axis linear module 11, the back plate 5 is fixedly installed on the Z-axis linear module 10, and the back plate 5 is mounted on the Z-axis linear module 10. Moving along the Z direction, the first welding head 3 and the guide rail 9 are installed on the back plate 5, the slide block 6 is arranged on the guide rail 9, the second welding head 7 is arranged on the slide block 6, and the second welding head 7 is arranged on the slide block 6. The head 7 moves and locates on the slider 6 along the X direction.

The first welding head 3 is composed of a pressure sensor 4, a welding needle holding block 2 and a welding needle 1 from top to bottom, the pressure sensor 4 is arranged on the top of the welding needle holding block 2, and the welding needle 1 is arranged on the welding needle holder The bottom of the holding block 2, the welding pin holding block 2 is connected with the first welding power source. The second welding head 7 is composed of a pressure sensor 4, a welding needle holding block 2 and a welding needle 1 from top to bottom, the pressure sensor 4 is arranged on the top of the welding needle holding block 2, and the welding needle 1 is arranged on the welding needle holder On the bottom of the holding block 2, a displacement cylinder 8 is fixedly arranged on the slide block 6, and the second welding head 7 is fixedly connected with the displacement cylinder 8.

The welding process using the dual-power four-point resistance welding welding device of the present invention is specifically: (1) the battery module is placed on the module carrier 13; (2) the Y-axis linear module 12 drives the module carrier 13 to move to the welding Initial position; (3) The X-axis linear module 11 drives the Z-axis linear module 10 and the first and second welding heads 7 to move above the modules to be welded; (4) The Z-axis linear module 10 drives the first 1. The second welding head 7 presses down on the pole piece of the cell, and when the pressure reaches the set value, the pressure sensor 4 gives a signal; (5) The first welding power supply and the second welding power supply respectively pass through the first welding head 3 and the second welding head 7 discharge, the current flows through the welding needle clamping block 2, welding needle 1, and the workpiece to form a circuit, and at the same time complete the welding of two sets of nickel sheets and the electrode sheet of the battery; (6) Then the Z axis rises by 5mm ; (7) The X-axis linear module 11 and the Y-axis linear module 12 respectively drive the welding head and the module to move to the next group of batteries to be welded; (8) Repeat steps (4) to (6) until Complete all cell soldering.

When the distance between the cells in the same module is inconsistent, or the distance between the cells in different modules is greatly different, such as the 18650 battery module and the 21700 battery module, the first welding head 3 and the second welding head 3 can be adjusted by the displacement cylinder 8 The Y-direction spacing between the two welding heads 7 can be changed by adjusting the position of the second welding head 7 on the guide rail 9 to change the X-direction spacing between the two groups of welding needles 1, so as to adapt to different products or different cell spacing models. Set of welding.

Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent replacements to the technical solution of the present invention by those skilled in the art will not depart from the present invention. The essence and scope of the technical solution of the invention.

Claims (3)

1. a kind of 4 Resistance Welding connection devices of dual power supply of compatible multiple power battery modules, it is characterised in that：It is described double 4 Resistance Welding connection devices of power supply are mainly by the first welding head, backboard, sliding block, the second welding head, guide rail, Z axis straight line Module, X-axis straight line module, Y-axis straight line module and module support plate composition；It is fixedly installed on the Y-axis straight line module described Module support plate, the Z axis straight line module are installed on X-axis straight line module, and the backboard is fixedly installed on the Z axis straight line module On, the backboard is moved with the Z axis straight line module along Z-direction, and first welding head and institute are equipped on the backboard Guide rail is stated, the sliding block is provided on the guide rail, is provided with second welding head on the sliding block, described second Welding head is in the sliding block upper edge X to running fix.

2. 4 Resistance Welding connection devices of dual power supply of compatible multiple power battery modules according to claim 1, It is characterized in that：First welding head is from top to bottom made of pressure sensor, capillary grip block and capillary successively, the pressure Force snesor is set to the top of the capillary grip block, and the capillary is set to the bottom of the capillary grip block, the weldering Needle grip block is connect with first source of welding current.

3. 4 Resistance Welding connection devices of dual power supply of compatible multiple power battery modules according to claim 1 or 2, It is characterized in that：Second welding head is from top to bottom made of pressure sensor, capillary grip block and capillary successively, described Pressure sensor is set to the top of the capillary grip block, and the capillary is set to the bottom of the capillary grip block, in institute Stating fixed setting on sliding block, there are one variable-position cylinders, second welding head to be fixedly connected with the variable-position cylinder.