Square canister battery negative pressure formation equipment capable of automatic model changing

Abstract

The present application relates to the field of battery equipment manufacturing, in particular to a square case battery negative pressure formation equipment capable of automatically changing type. The 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 positive probes, the negative probe mounting plate is provided with negative probes, and the suction nozzle mounting plate is provided with negative pressure suction nozzles. The positive probe mounting plate, the negative probe mounting plate and the suction nozzle mounting plate are respectively provided with connecting blocks on both sides, and the connecting blocks are provided with cam followers. The positive probe mounting plate, the negative probe mounting plate and the suction nozzle mounting plate are installed on a guide rail mounting plate through guide rails, and the guide rail mounting plate is fixed on a fixed frame through a mounting connecting plate. The present application can meet the negative pressure formation requirements of different models of square case batteries, and has the characteristics of high docking precision and being suitable for mass production.

Description

Technical Field

[0001] This invention relates to the field of battery equipment manufacturing, and in particular to a negative pressure formation device for prismatic batteries with automatic type change capability. Background Technology

[0002] With the rapid development of new energy vehicles and the energy storage industry, prismatic batteries have become one of the mainstream choices in the market due to their high energy density, good safety, and stable performance. In the battery production process, the formation process is one of the key steps determining battery performance. Its purpose is to activate the chemical substances inside the battery through charging and discharging to form a stable solid electrolyte interface (SEI) film. Traditional formation equipment is usually operated manually or semi-automatically, which suffers from low efficiency, poor precision, and insufficient adaptability, making it difficult to meet the production needs of large-volume, multi-model batteries.

[0003] In existing negative pressure formation equipment, the lack of precise positioning and buffering mechanisms during battery terminal and probe docking often leads to deviations or probe damage during the docking process, affecting equipment lifespan and battery formation results. Furthermore, traditional equipment relies heavily on manual operation for probe spacing adjustment, which is time-consuming, labor-intensive, and lacks precision, failing to meet the rapid replacement requirements of different battery models. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatically interchangeable negative pressure formation device for prismatic batteries. This invention allows for adjustment of the spacing between the positive electrode probe, negative electrode probe, and negative pressure nozzle according to different battery models, thereby meeting the negative pressure formation requirements of various prismatic battery models. This invention features high docking accuracy and is suitable for mass production.

[0005] The technical solution of this invention is: an automatic shape-changing negative pressure formation device for prismatic batteries, comprising a fixed frame, a moving frame, functional components, a heat dissipation component, and an automatic pitch-changing mechanism. The moving frame, functional components, heat dissipation component, and automatic pitch-changing mechanism are mounted on the fixed frame. The functional components are mounted on the upper part of the fixed frame. The moving frame can move up and down within the fixed frame via a driving component of the fixed frame. The functional components include one or more detection components, each including 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 electrode probe, the negative probe mounting plate with a negative electrode probe, and the suction nozzle mounting plate with a negative pressure suction nozzle. Connecting blocks are respectively provided on both sides of the positive probe mounting plate, negative probe mounting plate, and suction nozzle mounting plate. Cam followers are provided on the connecting blocks. The positive probe mounting plate, negative probe mounting plate, and suction nozzle mounting plate are mounted on a guide rail mounting plate via guide rails. The guide rail mounting plate is fixed to the fixed frame via a mounting connecting plate. The moving frame includes a tray seat, a limiting rod, and a buffer. The system includes a punch pad, an adjusting rod, and a limit rod on the tray base, which is connected to the buffer pad via the adjusting rod. The automatic pitch-changing mechanism comprises a drive mechanism, a transmission shaft, a pitch-changing device, and a support. The drive mechanism drives the transmission shaft to rotate, and the transmission shaft drives the pitch-changing slot plate of the pitch-changing device to move up and down. The drive mechanism includes a drive motor and a gear set, with the drive motor driving the gear set. The pitch-changing device includes a lead screw support, a ball screw assembly, a bearing with a mounting seat, a pitch-changing slot plate, pitch-changing positioning holes, and a linear guide. The ball screw assembly is connected to the drive transmission shaft, which is connected to the support via the bearing with a mounting seat. The pitch-changing lead screw is connected to the ball screw assembly, and the middle part of the lead screw is connected to the support via the lead screw support. The pitch-changing slot plate is connected to the bottom of the lead screw. The pitch-changing slot plate is connected to the support via the linear guide, allowing it to move up and down within a fixed area. The pitch-changing slot plate has multiple sets of pitch-changing positioning holes, each set consisting of three holes, corresponding to the cam follower connected to the positive probe mounting plate, negative probe mounting plate, and nozzle mounting plate, respectively.

[0006] According to the above-described automatic type-changing negative pressure formation equipment for square-shell batteries, the fixed frame includes a frame and a cylinder. The frame includes a top frame, a bottom frame, and guide shafts. Four guide shafts connect the top frame and the bottom frame to form a cuboid. The cylinder is fixed to the top frame and includes a piston rod, a throttle valve, and a magnetic switch.

[0007] According to the above-described automatic type-changing prismatic battery negative pressure formation equipment, 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-described automatic type-changing prismatic battery negative pressure formation equipment, the heat dissipation component includes a fan mounting plate and a fan, with multiple fans mounted on the fan mounting plate for heat dissipation of the functional components and the prismatic battery to be negative pressure formed, and the heat dissipation component is fixed on the top frame.

[0009] According to the above-described automatic interchangeable prismatic battery negative pressure formation equipment, the feature is that: the guide rail mounting plate is equipped with a scale and a pointer, and the distance between the positive probe mounting plate, the negative probe mounting plate and the suction nozzle mounting plate is read by the scale and the pointer.

[0010] According to the above-described automatic type-changing negative pressure formation equipment for prismatic batteries, the feature is that: a temperature sensor can be installed on the detection component; and a wire harness plate is installed on the back of the positive probe mounting plate, the negative probe mounting plate, and the nozzle mounting plate.

[0011] According to the above-described automatic type-changing negative pressure formation equipment for square-shell batteries, the feature is that: an adjustable handle is also 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-described automatic type-changing prismatic battery negative pressure formation device, the positive electrode probe and the negative electrode probe are respectively connected to an external power supply, and the negative pressure suction nozzle is connected to an external flexible hose.

[0013] According to the above-described automatic type-changing negative pressure formation equipment for prismatic batteries, the feature is that: the moving frame further includes floating seats, linear bearings, positioning pins, a detection element mounting plate, and limiting seats; two floating seats are respectively fixed on both sides of the tray seat; linear bearings are respectively installed at the four corners of the floating seats; four guide shafts are respectively connected inside the linear bearings; positioning pins and limiting seats are provided on the tray seat.

[0014] According to the above-described automatic type-changing negative pressure formation device for prismatic batteries, the characteristic feature is that the buffer pad is made of natural rubber or synthetic rubber.

[0015] According to the above-described automatic type-changing negative pressure formation equipment for prismatic batteries, the characteristic feature is that: a detection element mounting plate is provided on the tray seat, and a detection element is installed on the detection element mounting plate. Attached Figure Description

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

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

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

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

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

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

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

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

[0024] Explanation of reference numerals in the attached drawings: Fixed frame 1, Top frame 11, Base frame 12, Cylinder 13, Piston rod 131, Throttle valve 132, Magnetic switch 133, Support base 14, Guide shaft 15, Moving frame 2, Tray base 21, Floating seat 22, Linear bearing 23, Positioning pin 25, Limiting rod 26, Buffer pad 261, Adjusting rod 262, Detection element mounting plate 27, Limiting 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, Cable bundle plate 37, Guide rail mounting plate 38, Guide rail 381, Scale 382, ​​Pointer 383, Heat dissipation assembly 4, Fan mounting plate 41, Fan 42, Automatic pitch changing mechanism 5, Drive motor 51, Gear set 52, Transmission shaft 53, Screw support 541, Ball screw assembly 542, Adjustable handle 543, Bearing with seat 544, Pitch changing groove plate 545, Pitch changing positioning hole 546, Linear guide rail 547, Guide rail end block 548, Pitch changing screw 549, Bracket 58. Detailed Implementation

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

[0026] like Figures 1 to 7 As shown, the present invention discloses an automatic interchangeable prismatic battery negative pressure formation device, comprising a fixed frame 1, a moving frame 2, functional components 3, a heat dissipation component 4, and an automatic pitch adjustment mechanism 5. The moving frame 2, functional components 3, heat dissipation component 4, and automatic pitch adjustment mechanism 5 are mounted on the fixed frame 1. The prismatic battery to be negatively formed is placed inside the moving frame 2. The functional component 3 is mounted on the upper part of the fixed frame 1. The automatic pitch adjustment mechanism 5 can adjust the distance between the positive probe mounting plate 31, the negative probe mounting plate 32, and the nozzle mounting plate 33 of the functional component 3. The moving frame 2 can move up and down within the fixed frame 1 via a driving component of the fixed frame 1. After the moving frame 2 moves, the prismatic battery to be negatively formed inside the moving frame 2 is precisely connected to the corresponding positive and negative electrodes and the corresponding parts of the nozzle and 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 cuboid. The cylinder 13 is fixed to the top frame 11. The cylinder 13 includes a piston rod 131, a throttle valve 132, and a magnetic switch 133. An extension rod can be added to the front side of the piston rod 131 of the cylinder 13 according to the height of the connected equipment. The support base 14 is provided on the bottom frame 12 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 base 21, floating seats 22, linear bearings 23, positioning pins 25, limiting rods 26, buffer pads 261, adjusting rods 262, a detection element mounting plate 27, and limiting seats 28. Two floating seats 22 are respectively fixed to both sides of the tray base 21. The two floating seats 22 are respectively connected to a cylinder extension rod or piston rod 131. Linear bearings 23 are respectively installed at the four corners of the floating seats 22, and four guide shafts 15 are respectively connected inside the linear bearings 23. The piston rod 131 is raised and lowered by the cylinder 13, thereby driving the overall raising and lowering of the motion frame 2. The prismatic battery to be negatively formed is placed on the tray base 21. According to the characteristics of the prismatic battery to be negatively formed, positioning pins 25 and limiting seats 28 can be provided on the tray base 21. Positioning pins 25 fix the position of the battery after installation, and limiting seats 28 keep the battery inside the device after installation. During movement, the battery shakes, ensuring high-precision docking of the positive and negative electrodes with the nozzle. Limiting rods 26 are respectively provided on the tray base 21. The limiting rods 26 are connected to the buffer pad 261 through the adjusting rod 262. By adjusting the length of the adjusting rod 262, it can accommodate the testing of prismatic batteries of different lengths to be formed under negative pressure. When the cylinder 13 drives the moving frame 2 to move, when the positive and negative electrodes and the suction nozzle are about to be connected, 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 connection, which is beneficial to improving connection accuracy and protecting the connection joint, ensuring that the positive electrode probe 311, negative electrode probe 321, and negative pressure suction nozzle 331 of the functional component 3 can be connected multiple times. The present invention has been tested for more than 32,000 connection times, and the connection effect of the relevant connection joints is still good after connection. The tray base 21 of the present invention can be provided with a detection element mounting plate 27. Detection elements are installed on the detection element mounting plate 27 to measure the working state of the prismatic battery to be formed under negative pressure.

[0029] like Figure 5 As shown, the functional component 3 of the present invention includes one or more detection components ( Figure 5The detection assembly (divided into two groups) includes a positive probe mounting plate 31, a negative probe mounting plate 32, and a suction nozzle mounting plate 33. The positive probe mounting plate 31 houses a positive probe 311, the negative probe mounting plate 32 houses a negative probe 321, and the suction nozzle mounting plate 33 houses a negative pressure suction nozzle 331. Connecting blocks 35 are respectively installed on both sides of the positive probe mounting plate 31, negative probe mounting plate 32, and suction nozzle mounting plate 33. A cam follower 34 is installed on each connecting block 35. The positive probe mounting plate 31, negative probe mounting plate 32, and suction nozzle mounting plate 33 are mounted on a guide rail mounting plate 38 via a guide rail 381. The guide rail mounting plate 38 can be equipped with a scale 382 and a pointer 383, allowing for quick reading of the distances between the positive probe mounting plate 31, negative probe mounting plate 32, and suction nozzle mounting plate 33. A temperature sensor 332 can be installed on the detection assembly. The guide rail mounting plate 38 is fixed to the top frame 11 via a mounting connecting plate 36. This invention allows for adjustment of 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 formation test requirements of different types of prismatic batteries. A cable management 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 improve the aesthetics 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 fans 42. Multiple fans 42 are mounted on the fan mounting plate 41 for dissipating heat from the functional component 3 and the prismatic battery to be formed under negative pressure. 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, and the transmission shaft 53 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, and the drive motor 51 drives the gear set 52 to move. The pitch-changing device includes a lead screw support 541, a ball screw assembly 542, an adjustable handle 543, a bearing 544, a pitch-changing slot plate 545, a pitch-changing positioning hole 546, a linear guide rail 547, and a guide rail end block 548. The ball screw assembly 542 is connected to the drive transmission shaft 53, and the drive transmission shaft 53 is connected to the bracket 58 through the bearing 544. The pitch-changing lead screw 549 is connected to the ball screw assembly 542, and the middle part of the pitch-changing lead screw 549 is connected to the bracket 58 through the lead screw support 541. The pitch-changing slot plate 545 is connected to the bottom of the pitch-changing lead screw 549. The variable pitch slot plate 545 is connected to the bracket 58 via a linear guide rail 547. Guide rail end blocks 548 can be set on both sides of the linear guide rail 547, allowing 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 this invention is provided with multiple sets of variable pitch positioning holes 546. Each set of variable pitch positioning holes 546 is divided into 3 holes, which correspond to the cam follower 34 connected to the positive probe mounting plate 31, the negative probe mounting plate 32, and the suction nozzle mounting plate 33, respectively. Each set of variable pitch positioning holes 546 is set with inclined holes according to the structure of the corresponding square-shell battery to be negatively formed, so that the variable pitch slot plate 545 drives the corresponding cam follower 34 to move during the up and down movement, realizing high-precision adjustment of the positive probe mounting plate 31, the negative probe mounting plate 32, and the suction nozzle mounting plate 33. This invention drives identical pitch-changing devices on both sides via a single drive shaft 53, ensuring that the positive probe mounting plate 31, negative probe mounting plate 32, and nozzle mounting plate 33 move the same distance on both sides, thus achieving high-precision synchronization. The invention utilizes the vertical movement of the pitch-changing positioning hole 546, combined with the position guidance of the guide shaft 15, to ensure that the adjusted accuracy between the corresponding mounting plates is less than 0.2 cm. Furthermore, the slow-approach docking method allows the device to dock with different product models multiple times, improving its reliability. An adjustable handle 543 can also be provided at the connection between the pitch-changing slot plate 545 and the pitch-changing lead screw 549. In case of a drive mechanism malfunction, the distance can be adjusted using the adjustable handle 543.

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

[0033] The working process of this invention is as follows: The moving frame 2 is used to place and fix the battery pack. Under the action of the cylinder 13, the moving frame 2 drives the battery pack to move up and down along the guide shaft 15 of the fixed frame 1, so that the battery terminals in the battery pack contact and press against the functional component 3. When the moving frame 2 drives the battery pack to the top, the positive terminal of the battery contacts the positive probe 311 of the functional component 3 and charges and discharges, the negative terminal of the battery contacts the negative probe 321 and charges and discharges, and the battery liquid filling port contacts and seals the negative pressure suction nozzle 331. Harmful gases are generated during the charging and discharging process of the battery. The harmful gases enter the gas-liquid separator in sequence through the negative pressure suction nozzle, the hose, and the manifold. This invention can set up multiple sets of prismatic batteries to be formed under negative pressure in both the horizontal and vertical directions at one time, meeting the needs of large-scale prismatic battery formation. At the same time, this invention can adjust the distance and docking with high precision, so that the equipment can be reliably used repeatedly and can meet the formation requirements of different models.

Claims

1. A negative pressure formation device for prismatic batteries with automatic shape change capability, comprising a fixed frame, a moving frame, functional components, a heat dissipation component, and an automatic pitch-changing mechanism, wherein the moving frame, functional components, heat dissipation component, and automatic pitch-changing mechanism are mounted on the fixed frame, the functional components are mounted on the upper part of the fixed frame, and the moving frame can move up and down within the fixed frame via a driving component of the fixed frame, characterized in that: The functional assembly comprises one or more than one detection assembly, the detection assembly comprising a positive probe mounting plate, a negative probe mounting plate, and a suction nozzle mounting plate, the positive probe mounting plate being provided with positive probes, the negative probe mounting plate being provided with negative probes, and the suction nozzle mounting plate being provided with negative pressure suction nozzles; the positive probe mounting plate, the negative probe mounting plate, and the suction nozzle mounting plate are respectively provided with connecting blocks on two sides, the connecting blocks being provided with cam followers, and the positive probe mounting plate, the negative probe mounting plate, and the suction nozzle mounting plate being mounted on a guide rail mounting plate through guide rails, and the guide rail mounting plate being fixed on a fixed frame through a mounting connecting plate.

2. The negative pressure formation equipment for square case battery capable of automatic model changeover according to claim 1, characterized in that: The fixed frame comprises a frame and a pneumatic cylinder, the frame comprising a top frame, a bottom frame, and four guide shafts, the four guide shafts connecting the top frame and the bottom frame into a cuboid, the pneumatic cylinder being fixed on the top frame, and the pneumatic cylinder comprising a piston rod, a throttle valve, and a magnetic switch.

3. The negative pressure formation equipment for square case battery capable of automatic model changeover according to claim 2, characterized in that: The bottom frame is provided with a support seat for supporting the bottom of the moving frame.

4. The negative pressure formation equipment for square case battery capable of automatic changeover according to claim 1, characterized in that: The heat dissipation assembly comprises a fan mounting plate and fans, a plurality of fans being mounted on the fan mounting plate for dissipating heat of the functional assembly and the square cell to be formed into a negative pressure, and the heat dissipation assembly being fixed on the top frame.

5. The negative pressure formation equipment for square case battery capable of automatic changeover according to claim 1, 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 suction nozzle mounting plate is read through the scale and the pointer.

6. The negative pressure formation equipment for square case battery capable of automatic changeover according to claim 1, characterized in that: The detection assembly is provided with a temperature sensor; the back of the positive probe mounting plate, the negative probe mounting plate, and the suction nozzle mounting plate is provided with a wire clamping plate.

7. The automatic type changeable square case battery negative pressure formation equipment according to claim 1, characterized in that: The variable distance groove plate is provided with an adjustable handle at the connection with the variable distance screw rod, and the two sides of the linear guide rail are provided with guide rail end blocks.

8. The automatic type changeable square case battery negative pressure formation equipment according to claim 1, characterized in that: The positive probes and the negative probes are respectively connected with an external power supply, and the negative pressure suction nozzle is connected with an external hose; the buffer pad is made of natural rubber or synthetic rubber.

9. The automatic type changeable square case battery negative pressure formation equipment according to claim 1, characterized in that: The moving frame further comprises floating seats, linear bearings, positioning pins, a detection element mounting plate, and a limiting seat, two floating seats being respectively fixed on the two sides of the tray seat, the four corners of the floating seat being respectively provided with linear bearings, and the four guide shafts being respectively connected in the linear bearings; the tray seat is provided with the positioning pins and the limiting seat.

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

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