Square-shell battery negative pressure formation equipment capable of automatically changing models

Abstract

The invention relates to the field of battery equipment manufacturing, in particular to square-shell battery negative pressure formation equipment capable of automatically changing models. A detection assembly comprises a positive probe mounting plate, a negative probe mounting plate and a suction nozzle mounting plate, the positive probe mounting plate is provided with a positive probe, the negative probe mounting plate is provided with a negative probe, and the suction nozzle mounting plate is provided with a negative pressure suction nozzle; connecting blocks are respectively arranged on two sides of the positive probe mounting plate, the negative probe mounting plate and the suction nozzle mounting plate, cam followers are arranged on the connecting blocks, the positive probe mounting plate, the negative probe mounting plate and the suction nozzle mounting plate are mounted on the guide rail mounting plate through guide rails, and the guide rail mounting plate is fixed on the fixing frame through the mounting connecting plates. The device can meet the negative pressure formation requirements of square-shell batteries of different models, and has the characteristics of high butt joint precision and suitability for mass production.

Description

Technical Field

[0001] The present invention relates to the field of battery equipment manufacturing, and in particular to a negative pressure forming device for square shell batteries capable of automatically changing shapes. Background Art

[0002] With the rapid development of the new energy vehicle and energy storage industries, prismatic batteries have become a mainstream choice in the market due to their high energy density, excellent safety, and stable performance. In the battery production process, the formation step is a key step in determining battery performance. Its purpose is to activate the chemical substances within the battery through charging and discharging, forming a stable solid electrolyte interface (SEI) film. Traditional formation equipment is typically operated manually or semi-automatically, and suffers from low efficiency, poor precision, and insufficient adaptability, making it difficult to meet the production needs of large-scale, multi-model batteries.

[0003] The existing negative pressure formation equipment often lacks precise positioning and buffering mechanisms when docking the battery pole and probe, which can easily lead to deviation or damage to the probe during the docking process, affecting the service life of the equipment and the battery formation effect. In addition, the probe spacing adjustment of traditional equipment mostly relies on manual operation, which is not only time-consuming and labor-intensive, but also difficult to ensure the adjustment accuracy, and cannot adapt to the needs of rapid model change of different battery models. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention provides a prismatic battery negative pressure formation device with automatic changeover capabilities. This device allows for adjustment of the spacing between the positive and negative probes, as well as the negative pressure nozzle, to meet the negative pressure formation requirements of various prismatic battery models. The device also features high docking precision, making it suitable for mass production.

[0005] The technical solution of the present invention is: a negative pressure forming device for square shell batteries with automatic change of shape, comprising a fixed frame, a moving frame, a functional component, a heat dissipation component, and an automatic pitch-changing mechanism, the moving frame, the functional component, the heat dissipation component, and the automatic pitch-changing mechanism are mounted on the fixed frame, the functional component is mounted on the upper part of the fixed frame, and the moving frame can move up and down in the fixed frame through the driving component of the fixed frame, characterized in that: the functional component comprises one or more detection components, the detection component comprises a positive probe mounting plate, a negative probe mounting plate, and a suction nozzle mounting plate, the positive probe mounting plate is provided with a positive probe, the negative probe mounting plate is provided with a negative probe, and the suction nozzle mounting plate is provided with a negative pressure suction nozzle; connecting blocks are respectively arranged on both sides of the positive probe mounting plate, the negative probe mounting plate, and the suction nozzle mounting plate, a cam follower is arranged on the connecting block, the positive probe mounting plate, the negative probe mounting plate, and the suction nozzle mounting plate are mounted on the guide rail mounting plate through a guide rail, and the guide rail mounting plate is fixed to the fixed frame by installing the connecting plate; the moving frame comprises a tray seat, a limit rod, a buffer Punch pad, adjustment rod, a limit rod is provided on the pallet seat, and the limit rod is connected to the buffer pad through the adjustment rod; the automatic pitch change mechanism includes a driving mechanism, a transmission shaft, a pitch change device, and a bracket. The driving mechanism drives the transmission shaft to rotate, and the transmission shaft drives the pitch change slot plate of the pitch change device to move up and down; the driving mechanism includes a driving motor and a gear set, and the driving motor drives the gear set to move; the pitch change device includes a screw support, a ball screw assembly, a seat bearing, a pitch change slot plate, a pitch change positioning hole, and a linear guide. The ball screw assembly is connected to the driving transmission shaft, and the driving transmission shaft is connected to the bracket through the seat bearing. The pitch change screw is connected to the ball screw assembly. The middle part of the pitch change screw is connected to the bracket through the screw support, and the pitch change slot plate is connected to the bottom of the pitch change screw; the pitch change slot plate is connected to the bracket through a linear guide, so that the pitch change slot plate moves up and down in a fixed area; multiple groups of pitch change positioning holes are provided on the pitch change slot plate, and each group of pitch change positioning holes is divided into 3 holes, which correspond to the cam followers connected to the positive probe mounting plate, the negative probe mounting plate, and the nozzle mounting plate respectively.

[0006] According to the above-mentioned automatically changeable square shell battery negative pressure formation equipment, it is characterized in that: the fixed frame includes a frame and a cylinder, the frame includes a top frame, a bottom frame, and a guide shaft, four guide shafts connect the top frame and the bottom frame to form a rectangular parallelepiped, the cylinder is fixed to the top frame, and the cylinder includes a piston rod, a throttle valve, and a magnetic switch.

[0007] According to the automatically changeable negative pressure formation equipment for square-shell batteries as described above, the feature is that a support base is provided on the base frame, and the support base is used to support the bottom of the moving frame.

[0008] According to the above-mentioned automatically changeable square shell battery negative pressure formation equipment, it is characterized in that: the heat dissipation component includes a fan mounting plate and a fan, and multiple fans are mounted on the fan mounting plate to dissipate heat for the functional components and the square shell batteries to be negatively pressure formed, and the heat dissipation component is fixed on the top frame.

[0009] According to the automatically changeable square shell battery negative pressure formation equipment as described above, it is characterized in that: the guide rail mounting plate is provided with a scale and a pointer, and the distance between the positive probe mounting plate, the negative probe mounting plate and the nozzle mounting plate is read by the scale and the pointer.

[0010] According to the above-mentioned automatically changeable square shell battery negative pressure formation equipment, the characteristics are: a temperature sensor can be set on the detection component; and a wire harness plate is set on the back of the positive probe mounting plate, the negative probe mounting plate, and the nozzle mounting plate.

[0011] According to the above-mentioned automatically changeable square shell battery negative pressure formation equipment, the characteristics are: an adjustable handle is further provided at the connection between the variable pitch slot plate and the variable pitch lead screw, and guide rail end blocks are provided on both sides of the linear guide rail.

[0012] According to the above-mentioned automatically changeable square shell battery negative pressure formation equipment, the feature is that the positive electrode probe and the negative electrode probe are respectively connected to the external power supply, and the negative pressure nozzle is connected to the external hose.

[0013] According to the above-mentioned automatically changeable square shell battery negative pressure formation equipment, the characteristics are as follows: the motion frame also includes a floating seat, a linear bearing, a positioning pin, a detection element mounting plate, and a limit seat, two floating seats are respectively fixed on both sides of the tray seat, and linear bearings are respectively provided at the four corners of the floating seat, and four guide shafts are respectively connected to the linear bearings; the positioning pin and the limit seat are provided on the tray seat,

[0014] According to the above-mentioned automatically changeable negative pressure formation equipment for square-shell batteries, the feature is that the buffer pad is made of natural rubber or synthetic rubber.

[0015] According to the above-mentioned automatically changeable negative pressure formation equipment for square-shell batteries, the feature is that the tray seat is provided with a detection element mounting plate, and the detection element is mounted on the detection element mounting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0017] Figure 2 It is an exploded view of the present invention.

[0018] Figure 3 It is a three-dimensional schematic diagram of the fixing frame of the present invention.

[0019] Figure 4 It is a three-dimensional schematic diagram of the motion frame of the present invention.

[0020] Figure 5 It is a three-dimensional schematic diagram of the functional components of the present invention.

[0021] Figure 6It is a three-dimensional schematic diagram of the heat dissipation assembly of the present invention.

[0022] Figure 7 It is a three-dimensional schematic diagram of the automatic pitch-changing mechanism of the present invention.

[0023] Figure 8 It is a three-dimensional schematic diagram of the functional components of the present invention from another perspective.

[0024] Explanation of the reference numerals: fixed frame 1, top frame 11, bottom frame 12, cylinder 13, piston rod 131, throttle valve 132, magnetic switch 133, support seat 14, guide shaft 15, moving frame 2, tray seat 21, floating seat 22, linear bearing 23, positioning pin 25, limit rod 26, buffer pad 261, adjustment rod 262, detection element mounting plate 27, limit seat 28, functional component 3, positive probe mounting plate 31, positive probe 311, negative probe mounting plate 32, negative probe 321, nozzle mounting plate 33, negative pressure nozzle 331, temperature sensor Sensor 332, cam follower 34, connecting block 35, mounting connecting plate 36, wiring harness plate 37, guide rail mounting plate 38, guide rail 381, scale 382, pointer 383, heat dissipation component 4, fan mounting plate 41, fan 42, automatic pitch change mechanism 5, drive motor 51, gear set 52, transmission shaft 53, screw support 541, ball screw assembly 542, adjustable handle 543, seat bearing 544, pitch change slot plate 545, pitch change positioning hole 546, linear guide 547, guide rail end block 548, pitch change screw 549, bracket 58. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below with reference to the accompanying drawings.

[0026] like Figures 1 to 7 As shown, the present invention is an automatically changeable square shell battery negative pressure formation equipment, comprising a fixed frame 1, a moving frame 2, a functional component 3, a heat dissipation component 4, and an automatic pitch-changing mechanism 5. The moving frame 2, the functional component 3, the heat dissipation component 4, and the automatic pitch-changing mechanism 5 are mounted on the fixed frame 1. The square shell battery to be negatively pressure-formed is placed in the moving frame 2. The functional component 3 is mounted on the upper part of the fixed frame 1. The automatic pitch-changing mechanism 5 can adjust the distance between the positive probe mounting plate 31, the negative probe mounting plate 32, and the suction nozzle mounting plate 33 of the functional component 3. The moving frame 2 can be moved up and down in the fixed frame 1 by the driving component of the fixed frame 1. After the moving frame 2 moves, the square shell battery to be negatively pressure-formed in the moving frame 2 is precisely connected to the corresponding positive and negative electrodes and the suction nozzle and the corresponding parts on the functional component 3.

[0027] like Figure 3As shown, the fixed frame 1 of the present invention includes a frame, a cylinder 13, and a support base 14. The frame includes a top frame 11, a bottom frame 12, and guide shafts 15. Four guide shafts 15 connect the top frame 11 and the bottom frame 12 to form a rectangular parallelepiped. The cylinder 13 is fixed to the top frame 11 and includes a piston rod 131, a throttle valve 132, and a magnetic switch 133. The front side of the piston rod 131 of the cylinder 13 can be equipped with a cylinder extension rod to adjust the height of the connected equipment. The support base 14 is provided on the bottom frame 12 and is used to support the bottom of the moving frame 2.

[0028] like Figure 4 As shown, the motion frame 2 of the present invention includes a tray seat 21, a floating seat 22, a linear bearing 23, a positioning pin 25, a limiting rod 26, a cushion 261, an adjustment rod 262, a detection element mounting plate 27, and a limiting seat 28. Two floating seats 22 are fixed to either side of the tray seat 21. The two floating seats 22 are respectively connected to the cylinder extension rod or piston rod 131. Linear bearings 23 are provided at the four corners of the floating seat 22, and four guide shafts 15 are respectively connected to the linear bearings 23. The cylinder 13 controls the rise and fall of the piston rod 131, thereby driving the rise and fall of the entire motion frame 2. The square shell battery to be negatively pressurized is placed on the tray seat 21. Depending on the characteristics of the square shell battery to be negatively pressurized, the tray seat 21 can be provided with a positioning pin 25 and a limiting seat 28. The positioning pin 25 fixes the position of the battery after installation, and the limiting seat 28 keeps the battery inside the device after installation, preventing the battery from shaking during movement, ensuring high-precision docking of the positive and negative electrodes with the suction nozzle. The tray seat 21 is provided with a limit rod 26, which is connected to a buffer pad 261 via an adjustment rod 262. The length of the adjustment rod 262 can be adjusted to accommodate the testing of square-shell batteries of different lengths to be negatively pressurized. When the cylinder 13 drives the motion frame 2 to move, when the positive and negative electrodes and the suction nozzle are about to be docked, the buffer pad 261 contacts the functional component 3 or the top frame 11, reducing the movement speed and gradually stopping. The buffer pad 261 of the present invention can be made of natural rubber, synthetic rubber, etc., so that the device of the present invention continues to move a short distance after contact, thereby slowing down the movement during docking, which is beneficial to improving docking accuracy and protecting the docking joints, ensuring that the positive probe 311, negative probe 321, and negative pressure suction nozzle 331 of the functional component 3 can be docked multiple times. The present invention has been tested for docking more than 32,000 times, and the docking effect remains good after the relevant docking joints are docked. The tray seat 21 of the present invention can be provided with a detection element mounting plate 27, on which a detection element is mounted to measure the working status of the square-shell battery to be negatively pressurized.

[0029] like Figure 5 As shown, the functional component 3 of the present invention includes one or more detection components ( Figure 5There are 2 groups in the figure), the detection assembly includes a positive probe mounting plate 31, a negative probe mounting plate 32, and a nozzle mounting plate 33. The positive probe mounting plate 31 is provided with a positive probe 311, the negative probe mounting plate 32 is provided with a negative probe 321, and the nozzle mounting plate 33 is provided with a negative pressure nozzle 331. Connecting blocks 35 are respectively provided on both sides of the positive probe mounting plate 31, the negative probe mounting plate 32, and the nozzle mounting plate 33. A cam follower 34 is provided on the connecting block 35. The positive probe mounting plate 31, the negative probe mounting plate 32, and the nozzle mounting plate 33 are installed on the guide rail mounting plate 38 through a guide rail 381. The guide rail mounting plate 38 can be provided with a scale 382 and a pointer 383. The distance between the positive probe mounting plate 31, the negative probe mounting plate 32 and the nozzle mounting plate 33 can be quickly read through the scale 382 and the pointer 383. A temperature sensor 332 can be provided on the detection assembly. The guide rail mounting plate 38 is fixed to the top frame 11 by installing a connecting plate 36. The present invention adjusts the distance between the positive probe mounting plate 31, the negative probe mounting plate 32, and the nozzle mounting plate 33 by adjusting the cam follower 34, thereby meeting the requirements for formation testing of different types of prismatic batteries. A wire harness plate 37 can be installed on the back of the positive probe mounting plate 31, the negative probe mounting plate 32, and the nozzle mounting plate 33 to organize the relevant connecting wires and enhance the appearance of the equipment.

[0030] like Figure 1 and Figure 6 As shown, the heat dissipation assembly 4 of the present invention includes a fan mounting plate 41 and a fan 42. A plurality of fans 42 are mounted on the fan mounting plate 41 to dissipate heat from the functional assembly 3 and the prismatic battery cells to be negatively pressurized. The heat dissipation assembly 4 is fixed to the top frame 11.

[0031] like Figure 7As shown, the automatic pitch-changing mechanism 5 of the present invention includes a drive mechanism, a transmission shaft 53, a pitch-changing device, and a bracket 58. The drive mechanism drives the transmission shaft 53 to rotate, which in turn drives the pitch-changing slot plate 545 of the pitch-changing device to move up and down. The drive mechanism includes a drive motor 51 and a gear set 52, with the drive motor 51 driving the gear set 52. The pitch-changing device includes a screw support 541, a ball screw assembly 542, an adjustable handle 543, a seat bearing 544, a pitch-changing slot plate 545, a pitch-changing positioning hole 546, a linear guide 547, and a guide rail end block 548. The ball screw assembly 542 is connected to the drive transmission shaft 53, which is connected to the bracket 58 via the seat bearing 544. The pitch-changing screw 549 is connected to the ball screw assembly 542. The middle portion of the pitch-changing screw 549 is connected to the bracket 58 via the screw support 541. The pitch-changing slot plate 545 is connected to the bottom of the pitch-changing screw 549. The variable pitch slot plate 545 is connected to the bracket 58 via a linear guide 547. Guide rail end blocks 548 can be provided on both sides of the linear guide 547 to enable the variable pitch slot plate 545 to move up and down within a fixed area. The variable pitch screw 549 is driven to move by the ball screw assembly 542, thereby driving the variable pitch slot plate 545 to move up and down. The variable pitch slot plate 545 of the present invention is provided with multiple groups of variable pitch positioning holes 546. Each group of variable pitch positioning holes 546 is divided into three holes, corresponding to the cam followers 34 connected to the positive probe mounting plate 31, the negative probe mounting plate 32, and the suction nozzle mounting plate 33. Each group of variable pitch positioning holes 546 is provided with inclined holes according to the structure of the corresponding square shell battery to be negatively pressurized, so that the corresponding cam follower 34 is driven to move during the up and down movement of the variable pitch slot plate 545, thereby achieving high-precision adjustment of the positive probe mounting plate 31, the negative probe mounting plate 32, and the suction nozzle mounting plate 33. The present invention uses a common drive shaft 53 to drive the pitch-changing devices with identical structures on both sides, so that the positive probe mounting plate 31, the negative probe mounting plate 32, and the nozzle mounting plate 33 move the same distance on both sides, thereby achieving high-precision synchronization. The present invention uses the pitch-changing positioning hole 546 to move up and down, combined with the position guidance of the guide shaft 15, to ensure that the accuracy of the adjustment between the corresponding mounting plates is less than 0.2 cm. At the same time, combined with the slow approach docking method, the device of the present invention can dock different models of products multiple times, thereby improving the reliability of the present invention. The present invention can also provide an adjustable handle 543 at the connection between the pitch-changing slot plate 545 and the pitch-changing screw 549. In the event of a failure of the drive mechanism, the adjustable handle 543 can be used to adjust the distance.

[0032] The positive electrode probe 311 and the negative electrode probe 321 of the present invention are respectively connected to an external power supply, and the negative pressure nozzle 331 is connected to an external hose.

[0033] The working process of the present invention is as follows: the moving frame 2 is used to place and fix the battery material frame. Under the action of the cylinder 13, the moving frame 2 drives the material battery frame to move back and forth along the guide shaft 15 of the fixed frame 1, so that the battery poles in the battery material frame contact and press the functional component 3. When the moving frame 2 drives the frame battery to rise to the top, the positive pole of the battery contacts and charges and discharges with the positive probe 311 of the functional component 3, the negative pole of the battery contacts and charges and discharges with the negative probe 321, and the battery filling port contacts and seals with the negative pressure suction nozzle 331. Harmful gases are generated during the battery charging and discharging process, and the harmful gases enter the gas-liquid separator in sequence through the negative pressure suction nozzle, the hose, and the bus. The present invention has the ability to arrange multiple groups of square shell batteries to be negatively pressured at one time in the horizontal and vertical directions, meeting the needs of large-scale square shell battery formation. At the same time, the present invention can adjust the distance and docking with high precision, so that the equipment can be reliably used repeatedly and can meet the formation needs of different models.

Claims

1. An automatically changeable negative pressure formation device for prismatic batteries, comprising a fixed frame, a moving frame, a functional component, a heat dissipation component, and an automatic pitch-changing mechanism. The moving frame, functional component, heat dissipation component, and automatic pitch-changing mechanism are mounted on the fixed frame, the functional component is mounted on top of the fixed frame, and the moving frame is movable up and down within the fixed frame via a drive component of the fixed frame. The device is characterized by: The functional component includes one or more detection components, and the detection component includes a positive probe mounting plate, a negative probe mounting plate, and a nozzle mounting plate. The positive probe mounting plate is provided with a positive probe, the negative probe mounting plate is provided with a negative probe, and the nozzle mounting plate is provided with a negative pressure nozzle; connecting blocks are respectively provided on both sides of the positive probe mounting plate, the negative probe mounting plate, and the nozzle mounting plate, and a cam follower is provided on the connecting block. The positive probe mounting plate, the negative probe mounting plate, and the nozzle mounting plate are installed on the guide rail mounting plate through a guide rail, and the guide rail mounting plate is fixed to the fixed frame by installing the connecting plate; the motion frame includes a pallet seat, a limit rod, a buffer pad, and an adjustment rod. A limit rod is provided on the pallet seat, and the limit rod is connected to the buffer pad through an adjustment rod; the automatic pitch change mechanism includes a driving mechanism, a transmission shaft, a pitch change device, and a bracket, and the driving mechanism drives the transmission shaft to rotate The transmission shaft drives the pitch slot plate of the pitch changing device to move up and down; the driving mechanism includes a driving motor and a gear set, and the driving motor drives the gear set to move; the pitch changing device includes a screw support, a ball screw assembly, a seat bearing, a pitch slot plate, a pitch positioning hole, and a linear guide rail. The ball screw assembly is connected to the driving transmission shaft, and the driving transmission shaft is connected to the bracket through the seat bearing. The pitch screw is connected to the ball screw assembly, the middle part of the pitch screw is connected to the bracket through the screw support, and the pitch slot plate is connected to the bottom of the pitch screw; the pitch slot plate is connected to the bracket through a linear guide rail, so that the pitch slot plate moves up and down in a fixed area; multiple groups of pitch positioning holes are arranged on the pitch slot plate, and each group of pitch positioning holes is divided into 3 holes, which correspond to the cam followers connected to the positive probe mounting plate, the negative probe mounting plate, and the nozzle mounting plate respectively.

2. The automatically changeable negative pressure formation equipment for square shell batteries according to claim 1, characterized in that: The fixed frame includes a frame and a cylinder. The frame includes a top frame, a bottom frame, and a guide shaft. Four guide shafts connect the top frame and the bottom frame to form a rectangular parallelepiped. The cylinder is fixed on the top frame. The cylinder includes a piston rod, a throttle valve, and a magnetic switch.

3. The automatically changeable negative pressure formation equipment for square shell batteries according to claim 2, characterized in that: A support base is provided on the base frame, and the support base is used to support the bottom of the motion frame.

4. The automatically changeable negative pressure formation equipment for square shell batteries according to claim 1, characterized in that: The heat dissipation component includes a fan mounting plate and a fan. Multiple fans are installed on the fan mounting plate to dissipate heat for functional components and square shell batteries to be negatively pressurized. The heat dissipation component is fixed on the top frame.

5. The automatically changeable negative pressure formation equipment for square-shell batteries according to claim 1, characterized in that: The guide rail mounting plate is set with a scale and a pointer, and the distances between the positive probe mounting plate, the negative probe mounting plate and the nozzle mounting plate are read through the scale and the pointer.

6. The automatically changeable negative pressure formation equipment for square shell batteries according to claim 1, characterized in that: A temperature sensor can be set on the detection component; a wire harness plate is set on the back of the positive probe mounting plate, the negative probe mounting plate, and the nozzle mounting plate.

7. The automatically changeable negative pressure formation equipment for square-shell batteries according to claim 1, characterized in that: An adjustable handle is also provided at the connection between the pitch-changing slot plate and the pitch-changing lead screw, and guide rail end blocks are provided on both sides of the linear guide rail.

8. The automatically changeable negative pressure formation equipment for square-shell batteries according to claim 1, characterized in that: The positive probe and the negative probe are respectively connected to an external power supply, and are connected to an external hose of the negative pressure nozzle; the buffer pad is natural rubber or synthetic rubber.

9. The automatically changeable negative pressure formation equipment for square-shell batteries according to claim 1, characterized in that: The motion frame also includes a floating seat, a linear bearing, a positioning pin, a detection element mounting plate, and a limit seat. The two floating seats are fixed on both sides of the tray seat respectively. Linear bearings are set at the four corners of the floating seat, and the four guide shafts are respectively connected to the linear bearings; positioning pins and limit seats are set on the tray seat.

10. The automatically changeable negative pressure formation equipment for square shell batteries according to claim 1, characterized in that: The tray seat is provided with a detection element mounting plate, and the detection element is mounted on the detection element mounting plate.

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