Rolling-type battery formation device

Abstract

A rolling-type battery formation device. A push plate (300) works in conjunction with an elastic plate assembly (200) to apply uniform and stable pressure to a battery clamped on a tray (430), and heating and formation operations are performed on the fixedly constrained battery, ensuring that the battery is subjected to a constant pressing force in a formation process, thereby helping to maintain the stability of the internal structure of the battery, and realizing the integration of hot pressing, constraint and formation in the formation process. The constant pressing force can prevent loosening or poor contact caused by a volume change due to a chemical reaction within the battery, ensuring that the formation process proceeds smoothly, thereby prolonging the cycle life of the battery and improving the safety of the battery.

Description

A rolling battery formation device TECHNICAL FIELD

[0001] The utility model relates to battery formation technical field especially relates to a rolling battery formation device. BACKGROUND

[0002] With the wide application of lithium batteries in electronic equipment, electric vehicles and other fields, the production quality and performance requirements of lithium batteries are continuously improved. In the lithium battery production formation process, the battery needs to be charged and discharged under certain temperature and pressure to activate the chemical reaction inside the battery, thereby improving the capacity and cycle life of the battery.

[0003] At present, the formation capacity equipment suitable for double-sided tab battery has many shortcomings. On the one hand, the existing formation equipment has complex structure and cumbersome operation, which not only increases the manufacturing cost and maintenance difficulty of the equipment, but also reduces the production efficiency. The operator needs to be specially trained to master the use method of the equipment, which increases the labor cost and time cost. On the other hand, the existing equipment has large kinetic energy loss in the running process. Due to the unreasonable design of the equipment structure, the energy transmission efficiency is low in the charging and discharging process, a large amount of energy is wasted, and the production cost is increased. At the same time, unstable pressure is also a prominent problem. Unstable pressure will affect the chemical reaction inside the battery, resulting in unstable battery performance, reducing the quality and consistency of the product.

[0004] In addition, the safety performance of the existing formation capacity equipment also has defects. In the charging and discharging process, if the equipment cannot effectively control the temperature and pressure, it may cause safety accidents such as battery overheating, fire and even explosion, which will cause serious harm to the production personnel and equipment.

[0005] Utility model content

[0006] In order to overcome the defects of the prior art, the utility model provides a rolling battery formation equipment with the functions of hot pressing, restraint and formation capacity.

[0007] The technical scheme adopted by the utility model to solve its technical problems is:

[0008] A rolling battery formation device for charging and discharging formation of lithium battery, comprising:

[0009] An outer frame;

[0010] An elastic plate assembly is arranged at one end of the outer frame, which comprises an elastic member and a baffle. One end of the elastic member is connected with the outer frame, and the other end is connected with the baffle.

[0011] A pushing plate is arranged at the other end of the outer frame and connected with a driving device, which is used to push the pushing plate to move along the direction of the elastic plate assembly;

[0012] A layer plate assembly is arranged between the elastic plate assembly and the pushing plate, which comprises a guide rod, a plurality of layer plates slidably arranged on the guide rod, and a supporting plate arranged between adjacent layer plates for clamping the battery; the pushing plate moves under the action of the driving device, cooperates with the elastic plate assembly to apply uniform and stable pressure on the battery clamped on the supporting plate, and ensures that the battery receives constant pressing force during formation.

[0013] Further, layer plate hangers are arranged at the two ends of the layer plate assembly, and sliding members are arranged in the layer plate hangers in the circumferential direction; the guide rod passes through the layer plate hangers and is slidably connected with the sliding members.

[0014] Further, the sliding members are pulleys, a plurality of mounting grooves are formed in the inner wall of the layer plate hanger, the pulleys are rotatably arranged in the mounting grooves, and the pulleys protrude from the mounting grooves and are slidably connected with the guide rod.

[0015] Further, the elastic members are arranged in a matrix on the baffle.

[0016] Further, the elastic members are springs.

[0017] Further, the driving device comprises a motor and a lead screw in transmission connection with the motor; the pushing plate is in transmission connection with the lead screw, the motor drives the lead screw to rotate, so that the pushing plate moves along the direction of the elastic plate assembly.

[0018] Further, a first driven gear is arranged at one end of the lead screw; the driving device further comprises a driving gear connected to the output end of the motor; a second driven gear is further arranged between the driving gear and the first driven gear; the motor rotates to drive the second driven gear and the first driven gear to rotate, so that the lead screw rotates.

[0019] Further, an adjusting gear is further arranged between the first driven gear and the second driven gear, which is used to adjust the rotation speed of the output of the lead screw.

[0020] Further, the PCB assembly comprises a first PCB and a second PCB arranged at the left and right ends of the layer plate; the first PCB and the second PCB are slidably arranged relative to the layer plate; the first PCB and the second PCB are both provided with beam grooves at the upper and lower ends, a beam rod is arranged in the beam grooves, and a rack is connected to the two ends of the beam rod; the outer frame is provided with transmission rods at positions corresponding to the two ends of the beam rod, and the two ends of the transmission rods are respectively provided with gears matched with the racks; rotating the transmission rods can drive the beam rod to move and drive the first PCB and the second PCB to move close to or away from each other.

[0021] Further, the outer frame is provided with a pair of infrared sensors.

[0022] The utility model discloses beneficial effect is:

[0023] The utility model discloses a rolling type battery formation equipment, through setting up the cooperation of push board and elastic plate component, the even and stable pressure is applied to the battery clamped on the supporting plate. And the fixed battery is heated and is formed capacity operation, ensures that the battery is received constant pressure in the formation process, helps maintaining the stability of the internal structure of battery. Realized the heat pressure, restraint, formation capacity in one in the formation process. Constant pressure can prevent the volume change of the battery interior due to the chemical reaction, and the loose or contact bad condition of appearing, guarantee the smooth operation of formation process, improve the cycle life and security of battery. BRIEF DESCRIPTION OF DRAWINGS

[0024] The utility model is further explained below in combination with the drawings and examples.

[0025] Fig. 1 is the three-dimensional structure schematic diagram of the utility model;

[0026] Fig. 2 is the overhead structure schematic diagram of the utility model;

[0027] Fig. 3 is the partial structure split schematic diagram of the utility model;

[0028] Fig. 4 is the schematic diagram of the drive device of the utility model;

[0029] Fig. 5 is the side view schematic diagram of the utility model;

[0030] Fig. 6 is the schematic diagram of the elastic plate component of the utility model;

[0031] Fig. 7 is the first state schematic diagram of the utility model's layer plate component;

[0032] Fig. 8 is the second state schematic diagram of the utility model's layer plate component;

[0033] Fig. 9 is the schematic diagram of the layer plate hanging seat of the utility model.

[0034] Among them,

[0035] 100, outer frame;

[0036] 200, elastic plate component; 210, elastic piece; 220, baffle;

[0037] 300, push plate;

[0038] 400, layer plate component; 410, layer plate; 411, layer plate hanging seat; 4111, sliding piece; 4112, mounting groove; 420, guide rod; 430, supporting plate;

[0039] 500, drive device; 510, motor; 511, driving gear; 520, screw rod; 530, first driven gear; 540, second driven gear; 550, adjusting gear;

[0040] 600, PCB assembly; 610, first PCB; 620, second PCB; 630, cross beam slot; 640, cross beam rod; 650, rack; 660, transmission rod;

[0041] 700, pair of sensors. DETAILED DESCRIPTION

[0042] The concept, specific structure and generated technical effects of the utility model will be described clearly and completely in combination with the embodiments and drawings, so as to fully understand the purpose, features and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, and other embodiments obtained by the person skilled in the art based on the embodiments of the utility model without creative labor belong to the protection scope of the utility model. In addition, all the coupling / connection relations involved in the patent do not mean that the components are directly connected, but means that a better coupling structure can be composed by adding or reducing coupling auxiliary components according to the specific implementation situation. The various technical features in the utility model creation can be interactively combined without mutual contradiction and conflict.

[0043] In the formation process of lithium battery production, the lithium ion battery just manufactured needs to be charged and discharged under a specific temperature and pressure, so as to activate the chemical reaction inside the battery, so that the battery performance meets the design requirements, and the capacity, cycle life and safety of the battery and other key indicators are improved.

[0044] The utility model discloses a kind of rolling battery formation equipment, for the charge-discharge formation processing of lithium battery, refer to Figure 1-3, comprising: outer frame 100;Elastic plate assembly 200, is arranged in one end of the outer frame 100, and elastic plate assembly 200 includes elastic member 210 and baffle 220, one end of the elastic member 210 is connected with outer frame 100, one end is connected with baffle 220;Push plate 300, it is arranged in the other end of the outer frame 100, and is connected with driving device 500, and the driving device 500 is used to push the push plate 300 moves along the direction of the elastic plate assembly 200.Layer plate assembly 400, between the elastic plate assembly 200 and push plate 300, the layer plate assembly 400 includes guide rod 420, a plurality of layer plates 410 slidingly mounted on the guide rod 420, and support plate 430 for clamping battery between adjacent layer plate;The push plate 300 moves under the action of driving device 500, and the elastic plate assembly 200 is cooperated to exert uniform and stable pressure on battery clamped on support plate 430, ensure that battery is subjected to constant pressure in formation process.

[0045] Wherein, PCB assembly 600 is configured on layer plate, for being connected with battery electrode;Heating assembly, it is arranged on layer plate 410, for heating treatment to battery after pressurization.

[0046] When using, battery is placed into the layer plate 410 of layer plate assembly 400 and is located in the position in the middle of layer plate, so that gold-plated conductive area of left and right PCB can contact with two pole ears of battery, so that pole piece at both ends of battery is electrically connected with PCB assembly 600.Driving device 500 pushes push plate 300 to move towards the direction of elastic plate assembly 200, and layer plate assembly 400 is compressed under the cooperation of push plate 300 and elastic plate assembly 200, when the pressure at both ends of battery reaches predetermined pressure, stop compression and keep the pressure.When pressurization at both ends of battery is completed, heating assembly is started to heat battery, and meanwhile, external power supply starts to charge and discharge battery through PCB assembly 600, to realize formation capacity processing of battery.It can be understood that when driving device 500 pushes push plate 300 to make layer plate assembly 400 compress, elastic member 210 of elastic plate assembly 200 is compressed synchronously, and the elastic plate assembly 200 here mainly plays the role of buffering and providing elastic pressure.In formation process, chemical reaction occurs in battery, and volume can change.Elastic member 210 can automatically adjust pressure according to volume change of battery, to keep constant pressure.This stability can improve formation quality of battery, and prolong cycle life of battery.For example, stable pressure can ensure stable performance of battery in long-term use during formation process of battery.

[0047] In some embodiments, a plurality of groups of the pair of sensors 700 are arranged on the outer frame 100 to realize real-time detection of the state of the battery, such as overage, overheight, and presence or absence of material, to ensure the quality and safety of battery production.

[0048] In some embodiments, referring to FIGS. 7-9, the layer plate assembly 400 is provided with a layer plate hanging seat 411 at both ends, and the layer plate hanging seat 411 is provided with a sliding piece 4111 in the circumferential direction; the guide rod 420 passes through the layer plate hanging seat 411 and is in sliding connection with the sliding piece 4111. The guide rod 420 passes through the layer plate hanging seat 411 and is in sliding connection with the sliding piece 4111, which first improves the sliding smoothness. The presence of the sliding piece 4111 reduces the direct friction between the layer plate hanging seat 411 and the guide rod 420, so that the sliding of the layer plate on the guide rod 420 is more relaxed. In the actual production process, when the driving device 500 drives the layer plate to move and compress, smooth sliding can greatly improve the work efficiency, reduce the jamming and resistance in the operation process, and ensure that the operation of the entire formation capacity equipment is more smooth. In addition, the sliding piece 4111 can effectively reduce the wear between the layer plate hanging seat 411 and the guide rod 420. With the long-time use of the equipment, if the layer plate hanging seat 411 directly rubs with the guide rod 420, the wear of the two will be aggravated, which not only affects the sliding performance of the layer plate, but also may reduce the service life of the equipment. The sliding piece 4111 is arranged, and the friction is transferred from between the layer plate hanging seat 411 and the guide rod 420 to between the sliding piece 4111 and the guide rod 420. Since the sliding piece 4111 is usually made of wear-resistant material or has special lubrication treatment, it can withstand more friction without being easily damaged. In this way, the service life of the layer plate hanging seat 411 and the guide rod 420 is prolonged, and the maintenance cost of the equipment is reduced.

[0049] Further, referring to FIG. 9, the sliding member 4111 is a pulley, the inner wall of the layer plate hanger 411 is provided with a plurality of mounting grooves 4112, the pulley is rotatably installed in the mounting groove 4112, and the pulley protrudes from the mounting groove 4112 and is in sliding connection with the guide rod 420. By setting the sliding member 4111 as a pulley, the rolling characteristics of the pulley can greatly reduce the sliding friction between the layer plate hanger 411 and the guide rod 420. Compared with the traditional nylon sliding sleeve structure, the rolling friction coefficient of the pulley is smaller, so that the sliding of the layer plate on the guide rod 420 is more smooth and efficient. In actual application, for example, in a large-scale battery production line, the position of the layer plate needs to be frequently adjusted to adapt to different specifications of batteries or to perform rapid production operations, and the use of the pulley can greatly improve the production efficiency and reduce the operation time and labor cost. The inner wall of the layer plate hanger 411 is provided with a plurality of mounting grooves 4112, and the pulley is rotatably installed in the mounting groove 4112, which can enhance the stability of the structure. The mounting grooves 4112 provide fixed mounting positions for the pulley, so that the pulley will not shift or shake during work. At the same time, the plurality of pulleys are evenly distributed on the inner wall of the layer plate hanger 411, which can jointly bear the weight of the layer plate and the acting force during sliding, thereby improving the stability of the entire layer plate assembly 400. For example, during equipment operation, even if subjected to a certain external force impact or vibration, the pulley can stably roll in the mounting groove 4112, ensuring that the position of the layer plate will not change greatly, and ensuring the stability and reliability of the battery formation process.

[0050] In some embodiments, referring to FIGS. 3 and 6, the elastic plate assembly 200 includes elastic members 210 and a baffle 220, one end of the elastic member 210 is connected with the outer frame 100, one end is connected with the baffle 220, and the elastic members 210 are arranged in a matrix on the baffle 220. The matrix arrangement of the elastic members 210 can increase the stability of the entire elastic plate assembly 200. The elastic members 210 at different positions jointly act to withstand forces from different directions, reducing the inclination or deviation of the baffle 220 during force application. In actual production, the equipment may be affected by various external factors such as vibration and impact, and the stable elastic plate assembly 200 can better cope with these disturbances and ensure that the pressure on the battery remains stable.

[0051] Further, the elastic member 210 is preferably a spring. The spring has good elastic performance and stability. In the formation capacity device, the spring can produce reliable elastic deformation under the action of the push plate 300, providing stable pressure for the baffle 220. The elastic coefficient of the spring is relatively stable and will not change significantly due to long-term use or environmental changes, ensuring the consistency and reliability of the device in applying pressure to the battery. For example, during the long-term battery formation process, the spring can always maintain a certain elastic force, ensuring that the battery receives uniform compression force and improving the formation quality of the battery. In addition, the spring has a simple structure and is very convenient to install and maintain.

[0052] Further, by selecting springs of different specifications and elastic coefficients, the elastic force of the elastic plate assembly 200 can be adjusted. According to the formation requirements of different types of batteries, the parameters of the spring can be adjusted to obtain a suitable pressure range.

[0053] In some embodiments, referring to FIGS. 1-4, the driving device 500 includes a motor 510 and a lead screw 520 in transmission connection with the motor 510; the push plate 300 is in transmission connection with the lead screw 520, and the motor 510 drives the lead screw 520 to rotate, thereby moving the push plate 300 in the direction of the elastic plate assembly 200. It can be understood that the rotation of the lead screw 520 driven by the motor 510 provides pressure to the push plate 300. The lead screw 520 transmission has high transmission efficiency and can effectively transmit the power of the motor 510 to the push plate 300, reducing energy loss. Compared with other transmission methods, the lead screw 520 transmission is more reliable when transmitting large thrust, and can ensure that the push plate 300 maintains stable movement during long-term operation. For example, in large-scale battery production, a large number of batteries need to be frequently formed, and an efficient transmission system can improve production efficiency and reduce energy consumption. In addition, the motor 510 can be connected with a control system to realize automatic control. Through programming, the speed, direction and running time of the motor 510 can be accurately controlled, thereby realizing the automatic movement and positioning of the push plate 300. Through automatic control, the production accuracy and consistency can be improved, and human operation errors can be reduced. At the same time, intelligent management of the production process can be realized, improving production efficiency and quality.

[0054] In some embodiments, referring to FIG. 4, one end of the lead screw 520 is provided with a first driven gear 530; the driving device 500 further comprises a driving gear 511 connected to the output end of the motor 510; the driving gear 511 is further provided with a second driven gear 540 between the first driven gear 530; the motor 510 rotates to drive the second driven gear 540 and the first driven gear 530 to rotate, so as to rotate the lead screw 520. Specifically, the lead screw 520 has four, which are located at the positions of the two ends of the push plate 300. That is, the motor 510 is used to drive the four lead screws 520 to rotate at the same time, so as to compress the layer plate. Among them, the second driven gear 540 has two, which are located on both sides of the driving gear 511 of the motor 510, and the driving gear 511 can drive the two second driven gears 540 to rotate. The lead screws 520 located on both sides are respectively engaged with the second driven gears 540 through the first driven gears 530 to drive the lead screws to rotate.

[0055] Further, referring to FIG. 4, an adjusting gear 550 is further provided between the first driven gear 530 and the second driven gear 540, which is used to adjust the output rotating speed of the lead screw 520.

[0056] In some embodiments, referring to FIGS. 5, 7 and 8, the PCB assembly 600 comprises a first PCB 610 and a second PCB 620 located at the left and right ends of the layer plate; the first PCB 610 and the second PCB 620 are slidably arranged relative to the layer plate; the first PCB 610 and the second PCB 620 are respectively provided with a cross beam groove 630 at the upper and lower ends, and a cross beam rod 640 is arranged in the cross beam groove 630, and the cross beam rod 640 is connected with a rack 650 at both ends; the outer frame 100 is provided with a transmission rod 660 corresponding to the positions of both ends of the cross beam rod 640, and the transmission rod 660 is respectively provided with a gear at both ends matched with the rack 650, and rotating the transmission rod 660 can drive the cross beam rod 640 to move and drive the first PCB 610 and the second PCB 620 to approach or move away.

[0057] It can be understood that the first PCB and the second PCB can be slidably arranged relative to the layer plate, so that in actual application, the position of the PCB can be flexibly adjusted according to different battery sizes and formation requirements. Referring to FIGS. 7 and 8, the first PCB and the second PCB are respectively adjusted to the maximum and the minimum relative to the layer plate assembly. For example, for batteries of different lengths or widths, the PCB can be slid to ensure good contact with the electrodes of the battery and improve the formation effect. The movement of the cross beam rod 640 in the cross beam groove 630 can accurately control the sliding direction and distance of the PCB, avoiding deviation or instability.

[0058] In addition, with reference to FIGS. 7, 8, the rack 650 connected to both ends of the cross beam rod 640 cooperates with the gear at both ends of the transmission rod 660 on the outer frame 100, and the driving of the cross beam rod 640 can be realized by rotating the transmission rod 660. The first PCB and the second PCB can be synchronously moved, and symmetry during position adjustment is ensured, so that the shape and size of the battery are better adapted. The operator only needs to rotate the transmission rod 660, and the positions of the two PCBs can be adjusted at the same time, without the need for separate operation on each PCB, saving time and labor cost.

[0059] The above is a specific description of the preferred embodiment of the utility model, but the utility model creation is not limited to the embodiments, and various equivalent modifications or replacements can be made by those skilled in the art without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the present application.

Claims

1. A rolling battery formation apparatus for the charge-discharge formation process of lithium batteries, characterized in that, The application relates to a battery pressing device, which comprises the following parts: an outer frame; a spring plate assembly arranged at one end of the outer frame, which comprises spring pieces and a baffle, one end of the spring piece being connected with the outer frame and the other end being connected with the baffle; a push plate arranged at the other end of the outer frame and connected with a driving device, the driving device being used for pushing the push plate to move along the spring plate assembly; a layer plate assembly arranged between the spring plate assembly and the push plate, which comprises a guide rod, a plurality of layer plates slidably arranged on the guide rod and a supporting plate arranged between adjacent layer plates and used for clamping a battery; the push plate moves under the action of the driving device and cooperates with the spring plate assembly to apply uniform and stable pressure on the battery clamped on the supporting plate, so that the battery can be ensured to be pressed by constant pressure during formation.

2. The rolling cell formation apparatus according to claim 1, wherein, Both ends of the layer plate assembly are provided with layer plate hanging seats, and sliding pieces are arranged in the layer plate hanging seats in a circumferential direction; the guide rod penetrates through the layer plate hanging seats and is slidably connected with the sliding pieces.

3. The rolling battery formation apparatus of claim 2, wherein, The sliding pieces are pulleys, a plurality of mounting grooves are formed in the inner walls of the layer plate hanging seats, the pulleys are rotatably arranged in the mounting grooves, and the pulleys protrude from the mounting grooves and are slidably connected with the guide rod.

4. The rolling battery formation apparatus of claim 1, wherein, The spring pieces are arranged in a matrix mode on the baffle.

5. The rolling cell formation apparatus according to claim 4, wherein The spring pieces are springs.

6. The rolling battery formation apparatus of claim 1, wherein, The driving device comprises a motor and a lead screw in transmission connection with the motor; the push plate is in transmission connection with the lead screw, the motor drives the lead screw to rotate, so that the push plate moves along the spring plate assembly.

7. The rolling cell formation apparatus according to claim 6, wherein One end of the lead screw is provided with a first driven gear; the driving device further comprises a driving gear connected with the output end of the motor; a second driven gear is further arranged between the driving gear and the first driven gear; the motor rotates to drive the second driven gear and the first driven gear to rotate, so that the lead screw rotates.

8. The rolling cell formation apparatus according to claim 7, wherein An adjusting gear is further arranged between the first driven gear and the second driven gear and used for adjusting the rotating speed of the lead screw.

9. The rolling battery formation apparatus of claim 1, wherein, The PCB assembly comprises first and second PCBs arranged at the left and right ends of the layer plate; the first and second PCBs are slidably arranged relative to the layer plate; the first and second PCBs are provided with beam grooves at the upper and lower ends; beam rods are arranged in the beam grooves; the two ends of the beam rods are connected with racks; the outer frame is provided with transmission rods corresponding to the positions of the two ends of the beam rods; the two ends of the transmission rods are respectively provided with gears matched with the racks; the transmission rods are rotated to drive the beam rods to move and drive the first and second PCBs to move close to or away from each other.

10. The rolling cell formation apparatus according to any one of claims 1 to 9, characterized by, The outer frame is provided with a pair of photoelectric sensors.

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