A battery pre-pressing device

Abstract

The present invention discloses a battery cell pre-pressing forming device, which relates to the field of lithium battery technology. The battery cell pre-pressing forming device includes a frame, a belt conveyor mechanism and a pressure-bearing mechanism. The frame includes a bottom plate, and the pressure-bearing mechanism includes two pads. The belt conveyor mechanism is installed between the two pads. The pad and the bottom plate are detachably connected. A ball head plunger is provided in the pad, and the ball head plunger is abutted against the bottom plate. The ball head plunger can use its own elastic force to drive the pad to move away from the bottom plate after the pad and the bottom plate are disassembled, so that the belt conveyor mechanism can be pulled out or pushed into the frame through the pressure-bearing mechanism. Compared with the prior art, the battery cell pre-pressing forming device provided by the present invention adopts a belt conveyor mechanism installed between the two pads and a pad provided with a ball head plunger, so that the belt conveyor mechanism can be quickly disassembled and installed, so as to facilitate belt replacement, and the belt replacement efficiency is high, saving manpower and time costs.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a battery cell pre-pressing and forming device. Background Art

[0002] At present, in the production process of power lithium batteries, pre-pressing the battery cells is an indispensable and important step. The size and stability of the pre-pressure during the battery cell forming process directly affect the quality of the battery cells, and then affect the quality and qualified rate of battery products. At present, the pre-pressing of battery cells is generally carried out by pressing plates. After the pre-pressing is completed, the battery cells will be conveyed by the transmission belt to the next process to realize the automation process. However, during the pre-pressing process, the transmission belt responsible for conveying the battery cells will also be subject to pre-pressure, which will inevitably lead to periodic damage and replacement of the transmission belt.

[0003] In view of this, it is particularly important to design and manufacture a battery pre-pressing molding device that can quickly change belts, especially in battery production. Summary of the invention

[0004] The object of the present invention is to provide a battery cell pre-pressing and forming device, which can quickly realize the disassembly and installation of a belt conveyor mechanism to facilitate belt replacement, with high belt replacement efficiency and saving manpower and time costs.

[0005] The present invention is achieved by adopting the following technical solutions.

[0006] A battery cell pre-pressing forming device comprises a frame, a belt conveyor mechanism and a pressure-bearing mechanism, the frame comprises a bottom plate, the pressure-bearing mechanism comprises two pads, the belt conveyor mechanism is installed between the two pads, the pads are detachably connected to the bottom plate, a ball head plunger is arranged in the pad, the ball head plunger abuts against the bottom plate, and the ball head plunger can use its own elastic force to drive the pad to move away from the bottom plate after the pad and the bottom plate are disassembled, so as to pull the belt conveyor mechanism out of or push it into the frame through the pressure-bearing mechanism.

[0007] Furthermore, the ball plunger includes a shell, an elastic member and a sphere. The backing plate is provided with a receiving groove, the shell is arranged in the receiving groove, the elastic member is installed in the shell and connected to the sphere, the sphere extends out of the shell and abuts against the bottom plate.

[0008] Furthermore, the bottom plate is provided with a limiting groove, and the ball is arranged to roll in the limiting groove. The limiting groove can limit the rolling direction of the ball, thereby limiting the push-pull direction of the pressure-bearing mechanism.

[0009] Furthermore, the pad is provided with a through hole, and the base plate is provided with a threaded hole. The position of the through hole corresponds to the position of the threaded hole. The through hole is used for screws to pass through. The screws can cooperate with the threaded holes to make the pad fit with the base plate and fix the relative position of the pad and the base plate.

[0010] Furthermore, the pressure-bearing mechanism also includes a handle, a first fixed plate and a second fixed plate, the two pads are arranged between the first fixed plate and the second fixed plate, the first fixed plate is fixedly connected to one pad, the second fixed plate is fixedly connected to the other pad, the handle is fixedly connected to the side of the first fixed plate away from the pad, and the first fixed plate and the second fixed plate are both spaced apart from the bottom plate.

[0011] Furthermore, a positioning pin is provided on the bottom plate, and the positioning pin can abut against the second fixing plate to limit the extreme position of the pressure-bearing mechanism being pushed into the frame.

[0012] Furthermore, the belt conveyor mechanism includes a first bracket, a second bracket, a first driving member, a driving wheel, a driven wheel and a transmission belt. The first driving member is installed on the first bracket and connected to the driving wheel. The driving wheel is rotatably connected to the first bracket. One end of the first bracket is fixedly connected to the first fixed plate, and the other end is fixedly connected to the second fixed plate. The driven wheel is rotatably connected to the second bracket. One end of the second bracket is fixedly connected to the first fixed plate, and the other end is fixedly connected to the second fixed plate. The first bracket and the second bracket are relatively arranged at two ends of the pad. The transmission belt is sleeved outside the driving wheel and the driven wheel to form an accommodating cavity.

[0013] Furthermore, the pressure-bearing mechanism also includes a pressure-bearing plate, one end of which is fixedly connected to a pad, and the other end of which is fixedly connected to another pad, and the pressure-bearing plate is arranged in the accommodating cavity.

[0014] Furthermore, the battery cell pre-pressing forming device also includes a driving mechanism and a pressure plate, and the frame also includes a top plate arranged parallel to the bottom plate and spaced apart, the driving mechanism is installed on the top plate and fixedly connected to the pressure plate, and the position of the pressure plate corresponds to the position of the belt conveyor mechanism.

[0015] Furthermore, the battery cell pre-pressing forming device also includes an air pump, the pressure plate is relatively arranged with a first side surface and a second side surface, the first side surface is provided with an air path, the second side surface is provided with a plurality of air holes, the plurality of air holes are all connected to the air path, and the air path is connected to the air pump.

[0016] The battery cell pre-pressing and forming device provided by the present invention has the following beneficial effects:

[0017] The battery cell pre-pressing forming device provided by the present invention has a frame including a bottom plate, a pressure-bearing mechanism including two pads, a belt conveyor mechanism installed between the two pads, the pad and the bottom plate are detachably connected, a ball plunger is provided inside the pad, the ball plunger abuts against the bottom plate, and the ball plunger can use its own elastic force to drive the pad to move away from the bottom plate after the pad and the bottom plate are disassembled, so that the belt conveyor mechanism can be pulled out or pushed into the frame through the pressure-bearing mechanism. Compared with the prior art, the battery cell pre-pressing forming device provided by the present invention can quickly realize the disassembly and installation of the belt conveyor mechanism because it adopts a belt conveyor mechanism installed between the two pads and a pad provided with a ball plunger, so as to facilitate belt replacement, with high belt replacement efficiency, saving manpower and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a battery cell pre-pressing and forming device from one perspective provided in an embodiment of the present invention;

[0020] Figure 2 A schematic structural diagram of a battery cell pre-pressing and forming device from another perspective provided in an embodiment of the present invention;

[0021] Figure 3 A schematic structural diagram of a pressure-bearing mechanism in a battery cell pre-pressing and forming device provided in an embodiment of the present invention;

[0022] Figure 4 A cross-sectional view from one perspective of the connection between the pressure-bearing mechanism and the bottom plate in the battery cell pre-pressing molding device provided by an embodiment of the present invention;

[0023] Figure 5 A cross-sectional view from another perspective of the connection between the pressure-bearing mechanism and the bottom plate in the battery cell pre-pressing molding device provided by an embodiment of the present invention;

[0024] Figure 6 for Figure 5 A partial enlarged view of the middle VI;

[0025] Figure 7 for Figure 2 Schematic diagram of the structure of the midsole plate;

[0026] Figure 8 A schematic diagram of the structure of the connection between the belt conveying mechanism and the pressure bearing mechanism in the battery cell pre-pressing and forming device provided in an embodiment of the present invention;

[0027] Fig. 9 A schematic structural diagram of a pressure plate from one perspective in a battery cell pre-pressing and forming device provided in an embodiment of the present invention;

[0028] Fig.10 A schematic structural diagram of a pressure plate in a battery cell pre-pressing and forming device provided in an embodiment of the present invention from another perspective;

[0029] Fig.11 A cross-sectional view of a battery cell pre-pressing and forming device provided in an embodiment of the present invention.

[0030] Icons: 100-battery cell pre-pressing device; 110-frame; 111-top plate; 112-bottom plate; 113-support plate; 114-guide column; 115-guide hole; 116-limiting groove; 117-threaded hole; 118-locating pin; 120-belt conveyor mechanism; 121-first bracket; 122-second bracket; 123-first driving member; 124-driving wheel; 125-driven wheel; 126-transmission belt; 127-accommodating cavity; 130-pressure-bearing mechanism; 131-pressure-bearing Plate; 132-handle; 133-first fixing plate; 134-second fixing plate; 135-pad; 136-ball plunger; 1361-shell; 1362-elastic member; 1363-sphere; 137-accommodating groove; 138-through hole; 140-driving mechanism; 141-second driving member; 142-connecting head; 143-pressure sensor; 144-connecting plate; 150-pressure plate; 151-first side; 152-second side; 153-air path; 154-air hole. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0037] Example

[0038] Please refer to Figure 1 The embodiment of the present invention provides a battery cell pre-pressing and forming device 100 for pre-pressing and forming battery cells. The device can quickly disassemble and install the belt conveyor mechanism 120 to facilitate belt replacement, and the belt replacement efficiency is high, saving manpower and time costs.

[0039] It should be noted that in the battery cell winding process, the battery cell pre-pressing molding device 100 determines the thickness of the final molded battery cell. Different pre-pressures will result in different gaps between the electrode and the diaphragm in the battery cell, resulting in different battery cell thicknesses, which in turn affects the smooth progress of the subsequent battery production process.

[0040] The cell pre-pressing device 100 includes a frame 110, a belt conveyor mechanism 120, a pressure mechanism 130, a driving mechanism 140, a pressure plate 150 and an air pump (not shown). The pressure mechanism 130 and the driving mechanism 140 are both mounted on the frame 110, the belt conveyor mechanism 120 is mounted on the pressure mechanism 130, the driving mechanism 140 is fixedly connected to the pressure plate 150, the position of the pressure plate 150 corresponds to the position of the belt conveyor mechanism 120, and the pressure plate 150 is arranged above the belt conveyor mechanism 120. The driving mechanism 140 can drive the pressure plate 150 to move toward the direction close to the belt conveyor mechanism 120, so as to hold the battery cell between the pressure plate 150 and the belt conveyor mechanism 120, thereby realizing the pre-pressing and forming of the battery cell. During this process, the pressure-bearing mechanism 130 can support the belt conveyor mechanism 120, that is, the pressure applied downward by the pressure plate 150 is transmitted to the pressure-bearing mechanism 130 through the belt conveyor mechanism 120 to ensure that the pre-pressing work is carried out stably. The belt conveyor mechanism 120 is used to drive the battery cell to move after the pre-pressing is completed, so that the battery cell enters the next process. The air pump is connected to the pressure plate 150, and the air pump is used to output positive pressure airflow to the battery cell through the pressure plate 150 after the pre-pressing is completed, so as to ensure that the battery cell and the pressure plate 150 are reliably disengaged, and prevent the battery cell from adhering to the pressure plate 150 and causing the battery cell to be strained.

[0041] Please refer to Figure 2 The frame 110 includes a top plate 111, a bottom plate 112, a support plate 113 and a guide column 114. The top plate 111 is fixedly connected to the bottom plate 112 through the support plate 113. The top plate 111 and the bottom plate 112 are arranged in parallel and spaced apart. The top plate 111 is arranged above the bottom plate 112. Both the top plate 111 and the bottom plate 112 are located on a horizontal plane. The driving mechanism 140 is installed on the top plate 111, and the pressure mechanism 130 is installed on the bottom plate 112. The driving mechanism 140 can drive the pressure plate 150 to approach or move away from the pressure mechanism 130. A guide hole 115 is provided on the top plate 111, and a guide column 114 is slidably disposed in the guide hole 115 and fixedly connected to the pressure plate 150. The pressure plate 150 can drive the guide column 114 to slide in the guide hole 115, and the guide column 114 can limit the movement direction of the pressure plate 150 so that the pressure plate 150 can only rise or fall in the vertical direction.

[0042] Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7The pressure-bearing mechanism 130 includes a pressure-bearing plate 131, a handle 132, a first fixed plate 133, a second fixed plate 134 and two pads 135. The two pads 135 are arranged in parallel and spaced apart, and are both arranged perpendicular to the bottom plate 112. The belt conveying mechanism 120 is installed between the two pads 135. The pads 135 are arranged in affixed with the bottom plate 112, and the pads 135 are detachably connected to the bottom plate 112. The two pads 135 are arranged between the first fixed plate 133 and the second fixed plate 134. The first fixed plate 133 is arranged in affixed with one pad 135 and fixedly connected, and the second fixed plate 134 is arranged in affixed with the other pad 135 and fixedly connected. In this embodiment, the cross-sections of the first fixed plate 133 and the second fixed plate 134 are both U-shaped, one pad 135 is arranged on the inner side of the first fixed plate 133, and the other pad 135 is arranged on the inner side of the second fixed plate 134.

[0043] Furthermore, a handle 132 is fixedly connected to a side of the first fixing plate 133 away from the backing plate 135, and the handle 132 is used for a worker to hold so as to pull the entire pressure-bearing mechanism 130 out of or push it into the frame 110. The first fixing plate 133 and the second fixing plate 134 are both spaced apart from the bottom plate 112 to reduce the friction resistance between the pressure-bearing mechanism 130 and the bottom plate 112, so as to facilitate pulling the pressure-bearing mechanism 130 out of or pushing it into the frame 110. One end of the pressure plate 131 is fixedly connected to a pad 135, and the other end is fixedly connected to another pad 135. The pressure plate 131 extends into the belt conveyor mechanism 120, and the battery cell is pressed between the pressure plate 150 and the pressure plate 131. The pressure plate 131 is used to cooperate with the pressure plate 150 to achieve pre-pressing and forming operations on the battery cell. The two pads 135 can support the pressure plate 131 at the same time. The pressure on the pressure plate 131 is transmitted to the bottom plate 112 through the pad 135 to prevent the pressure plate 131 from being deformed under pressure.

[0044] It should be noted that a ball plunger 136 is provided in the pad 135, and the ball plunger 136 is abutted against the base plate 112. The ball plunger 136 can use its own elastic force to drive the pad 135 to move away from the base plate 112 after the pad 135 and the base plate 112 are disassembled, so as to facilitate the belt conveyor mechanism 120 to be pulled out or pushed into the frame 110 through the pressure-bearing mechanism 130, thereby realizing the rapid disassembly and assembly of the belt conveyor mechanism 120, thereby improving the belt changing efficiency of the belt conveyor mechanism 120, increasing the maintainability of the battery cell pre-pressing molding device 100, and ensuring the production efficiency of the battery cell pre-pressing molding device 100.

[0045] In this embodiment, the ball plunger 136 includes a shell 1361, an elastic member 1362 and a ball 1363. The backing plate 135 is provided with a receiving groove 137 in a direction close to the bottom plate 112, and the shell 1361 is arranged in the receiving groove 137. The elastic member 1362 is installed in the shell 1361 and connected to the ball 1363. One end of the elastic member 1362 abuts against the bottom wall of the shell 1361, and the other end abuts against the ball 1363. The elastic member 1362 can apply elastic force to the ball 1363. The ball 1363 extends out of the shell 1361 and abuts against the bottom plate 112. The ball 1363 can roll relative to the bottom plate 112 to further reduce the friction resistance between the pressure-bearing mechanism 130 and the bottom plate 112, so as to facilitate pulling the pressure-bearing mechanism 130 out of or pushing it into the frame 110. Specifically, the elastic member 1362 is a spring, but is not limited thereto. In other embodiments, the elastic member 1362 may also be elastic rubber, and the material of the elastic member 1362 is not specifically limited.

[0046] When the battery cell pre-pressing molding device 100 is in working state, the pad 135 and the bottom plate 112 are fitted and fixedly connected. At this time, the elastic member 1362 of the ball plunger 136 is in a compressed state, and the compression deformation is relatively large. After the pad 135 and the bottom plate 112 are disassembled, the elastic member 1362 rebounds under the action of its own elastic force and stretches in a direction away from the bottom plate 112, thereby driving the pad 135 to move in a direction away from the bottom plate 112, pushing the pad 135 away from the bottom plate 112, so that there is a gap between the pad 135 and the bottom plate 112. The elastic part 1362 of the ball head plunger 136 is still in a compressed state, but the compression deformation is small. Since the pad 135 and the base plate 112 are spaced apart, and the ball 1363 is always in contact with the base plate 112, after the pad 135 and the base plate 112 are disassembled, the entire pressure-bearing mechanism 130 is only in contact with the base plate 112 through the ball 1363. The ball 1363 can drive the pressure-bearing mechanism 130 to move by rolling relative to the base plate 112 to reduce friction resistance and facilitate pulling the pressure-bearing mechanism 130 out or pushing it into the frame 110.

[0047] It is worth noting that the bottom plate 112 is provided with a limiting groove 116, and the ball 1363 is rolled in the limiting groove 116. The ball 1363 can roll along the extension direction of the limiting groove 116. The limiting groove 116 can limit the rolling direction of the ball 1363, thereby limiting the push-pull direction of the pressure-bearing mechanism 130, so that the push-pull direction of the pressure-bearing mechanism 130 is the extension direction of the limiting groove 116. Specifically, the cross section of the limiting groove 116 is V-shaped, and the extension direction of the limiting groove 116 is perpendicular to the pad 135 and parallel to the plane where the pressure plate 131 is located.

[0048] In this embodiment, the number of the receiving grooves 137 provided on each pad 135 is two, the number of the ball plungers 136 is four, and each ball plunger 136 is installed in one receiving groove 137. The number of the limiting grooves 116 is two, and the two limiting grooves 116 are arranged on the bottom plate 112 in parallel and at intervals. The balls 1363 of the two ball plungers 136 on each pad 135 are both rolled and arranged in one limiting groove 116, so as to further improve the limiting effect and ensure that the pressure-bearing mechanism 130 can only be pulled out or pushed into the frame 110 along the extending direction of the limiting groove 116. However, it is not limited to this. In other embodiments, the number of the receiving grooves 137 provided on each pad 135 can also be three, in which case the number of the ball plungers 136 is six, and the number of the limiting grooves 116 is three, and the number of the receiving grooves 137, the ball plungers 136 and the limiting grooves 116 is not specifically limited.

[0049] It should be noted that the pad 135 is provided with a through hole 138, and the bottom plate 112 is provided with a threaded hole 117, and the position of the through hole 138 corresponds to the position of the threaded hole 117. The through hole 138 is used for a screw (not shown) to pass through, and the screw can cooperate with the threaded hole 117 and be tightened relative to the threaded hole 117 to make the pad 135 fit with the bottom plate 112, and fix the relative position of the pad 135 and the bottom plate 112 to prevent the pad 135 from being displaced relative to the bottom plate 112.

[0050] In this embodiment, the number of through holes 138 provided on each pad 135 is three, the number of screws is six, the number of threaded holes 117 is six, three through holes 138 are arranged in parallel and spaced apart on one pad 135, each receiving groove 137 is arranged between two adjacent through holes 138, and the position of each through hole 138 corresponds to the position of a threaded hole 117. However, this is not limited to this, in other embodiments, the number of through holes 138 provided on each pad 135 may also be four, in which case the number of threaded holes 117 and screws are both eight, and the number of through holes 138, threaded holes 117 and screws is not specifically limited.

[0051] It should be noted that a positioning pin 118 is provided on the bottom plate 112, and the positioning pin 118 is located at one end of the limiting groove 116. The positioning pin 118 can abut against the second fixing plate 134 to limit the limit position of the pressure-bearing mechanism 130 pushed into the frame 110. When the pressure-bearing mechanism 130 moves to the limit position along the extension direction of the limiting groove 116, the second fixing plate 134 of the pressure-bearing mechanism 130 abuts against the positioning pin 118, and at this time, the position of the through hole 138 on the pad 135 corresponds to the position of the threaded hole 117 on the bottom plate 112, so that the pad 135 and the bottom plate 112 can be connected by screws.

[0052] In this embodiment, there are two positioning pins 118, which are arranged on the bottom plate 112 in parallel and spaced apart, and are located between the two limiting grooves 116. The two positioning pins 118 can abut against the second fixing plate 134 at the same time to further improve the limiting effect and ensure that the pressure-bearing mechanism 130 moves into place. However, this is not limited to this. In other embodiments, the number of positioning pins 118 can be three or four, and the number of positioning pins 118 is not specifically limited.

[0053] Please refer to Figure 8 The belt conveying mechanism 120 includes a first bracket 121, a second bracket 122, a first driving member 123, a driving wheel 124, a driven wheel 125 and a transmission belt 126. The first driving member 123 is mounted on the first bracket 121 and connected to the driving wheel 124. The driving wheel 124 is rotatably connected to the first bracket 121. One end of the first bracket 121 is fixedly connected to the first fixing plate 133, and the other end is fixedly connected to the second fixing plate 134. The driven wheel 125 is rotatably connected to the second bracket 122. One end of the second bracket 122 is fixedly connected to the first fixing plate 133, and the other end is fixedly connected to the second fixing plate 134. The first bracket 121 and the second bracket 122 are relatively arranged at the two ends of the pad 135. The transmission belt 126 is sleeved outside the driving wheel 124 and the driven wheel 125, and a receiving cavity 127 is formed. The first driving member 123 can drive the driving wheel 124 to rotate, and the driving wheel 124 can drive the driven wheel 125 to rotate through the transmission belt 126. The battery cell is placed on the transmission belt 126 to realize the function of the belt conveyor mechanism 120 to drive the battery cell to move. In this embodiment, the transmission belt 126 is an anti-static belt to avoid the situation where the transmission belt 126 and the diaphragm of the battery cell are electrostatically adsorbed to avoid the diaphragm being torn or damaged.

[0054] Specifically, the pressure plate 131 is arranged in the accommodating cavity 127 and is arranged close to the upper transmission belt 126. There is a gap between the pressure plate 131 and the upper transmission belt 126 to prevent the pressure plate 131 from causing friction interference to the movement of the transmission belt 126. In the process of pre-pressing the battery cell, the battery cell is placed on the transmission belt 126, and the driving mechanism 140 drives the pressure plate 150 to move downward to press the battery cell on the transmission belt 126. At this time, the transmission belt 126 undergoes elastic deformation and is pressed against the pressure plate 131 to achieve the pre-pressing operation of the battery cell. After the pre-pressing operation is completed, the driving mechanism 140 drives the pressure plate 150 to reset upward, and no longer presses the transmission belt 126 through the battery cell. The transmission belt 126 rebounds under the action of its own elastic force and forms a gap with the pressure plate 131. The first driving member 123 drives the transmission belt 126 to rotate through the driving wheel 124 to drive the pre-pressed battery cell to move to the next process.

[0055] Furthermore, since the transmission belt 126 is subjected to pre-pressure at the same time during each battery cell pre-pressing process, the transmission belt 126 will inevitably be damaged over time, and therefore, the transmission belt 126 needs to be replaced periodically. In this embodiment, the pressure-bearing mechanism 130 is pulled out of the frame 110 by rolling the ball 1363 relative to the bottom plate 112, thereby bringing the belt conveyor mechanism 120 out of the frame 110, so as to facilitate the replacement of the transmission belt 126 on the belt conveyor mechanism 120, and the belt replacement efficiency is high, thereby ensuring the production efficiency of the battery cell pre-pressing device 100.

[0056] Please refer to Fig. 9 and Fig.10 It should be noted that the pressure plate 150 is relatively provided with a first side surface 151 and a second side surface 152. The first side surface 151 is used to connect with the driving mechanism 140, and the second side surface 152 is used to pre-press the battery cell. The first side surface 151 is provided with an air path channel 153, and the second side surface 152 is provided with a plurality of air holes 154. The plurality of air holes 154 are all connected with the air path channel 153, and the air path channel 153 is connected with the air pump. After the pre-pressing operation is completed, the air pump outputs a positive pressure airflow into the air path channel 153, and the airflow passes through the air path channel 153 and enters the plurality of air holes 154 respectively, so as to ensure that the second side surface 152 is reliably separated from the battery cell, prevent the battery cell from sticking to the second side surface 152, improve the quality of the formed battery cell, and improve the size consistency of the formed battery cell.

[0057] In this embodiment, the pressure plate 150 is made of polyoxymethylene material to further prevent the battery cells from sticking. In addition, the diameter of the air holes 154 ranges from 0.5 mm to 1 mm to prevent the air holes 154 from pressing circular pressing marks on the surface of the battery cells during the pre-pressing process and damaging the battery cells.

[0058] Please refer to Fig.11 The driving mechanism 140 includes a second driving member 141, a connector 142, a pressure sensor 143 and a connecting plate 144. The second driving member 141 is fixedly mounted on the top plate 111 and connected to the connector 142. The connector 142 is fixedly connected to the connecting plate 144 through the pressure sensor 143. The connecting plate 144 is fitted with the pressure plate 150 and fixedly connected. The second driving member 141 can drive the connecting plate 144 to move up and down through the connector 142 and the pressure sensor 143, thereby driving the pressure plate 150 to move upward or downward, thereby realizing the pre-pressing operation of the battery cell.

[0059] Specifically, the pressure sensor 143 is electrically connected to the second driving member 141. The pressure sensor 143 is used to detect pressure data in real time during the pre-pressing process and transmit the pressure data to the second driving member 141. The pressure sensor 143 and the second driving member 141 work together to realize the accurate execution of the pre-pressing action and the closed-loop control of the pre-pressing pressure, thereby achieving stable control of the pre-pressing size of the battery cell between 100 kg and 7 tons and improving the pre-pressing effect.

[0060] In this embodiment, the first driving member 123 is a motor, and the second driving member 141 is an electric cylinder, but it is not limited to this. In other embodiments, the first driving member 123 can be a hydraulic motor or a pneumatic motor, and the second driving member 141 can be a cylinder or a hydraulic cylinder. There is no specific limitation on the types of the first driving member 123 and the second driving member 141.

[0061] The battery cell pre-pressing forming device 100 provided in the embodiment of the present invention comprises a frame 110 including a base plate 112, a pressure-bearing mechanism 130 including two pads 135, a belt conveyor mechanism 120 installed between the two pads 135, the pads 135 and the base plate 112 are detachably connected, a ball plunger 136 is arranged in the pad 135, the ball plunger 136 is abutted against the base plate 112, and the ball plunger 136 can use its own elastic force to drive the pad 135 to move in a direction away from the base plate 112 after the pad 135 and the base plate 112 are disassembled, so as to facilitate the belt conveyor mechanism 120 to be pulled out or pushed into the frame 110 through the pressure-bearing mechanism 130. Compared with the prior art, the battery cell pre-pressing forming device 100 provided by the present invention adopts a belt conveyor mechanism 120 installed between two pads 135 and a pad 135 provided with a ball head plunger 136. Therefore, the belt conveyor mechanism 120 can be quickly disassembled and installed to facilitate belt changing, with high belt changing efficiency, saving manpower and time costs.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery cell pre-pressing device, characterized in that: The invention comprises a frame, a belt conveying mechanism and a pressure-bearing mechanism, wherein the frame comprises a bottom plate, the pressure-bearing mechanism comprises two pads, the belt conveying mechanism is installed between the two pads, the pads are detachably connected to the bottom plate, a ball plunger is arranged in the pads, the ball plunger abuts against the bottom plate, and the ball plunger can use its own elastic force to drive the pad to move away from the bottom plate after the pads are detached from the bottom plate, so as to pull the belt conveying mechanism out of or push it into the frame through the pressure-bearing mechanism.

2. The battery cell pre-pressing device according to claim 1, characterized in that: The ball plunger comprises a shell, an elastic member and a sphere. The backing plate is provided with a receiving groove, the shell is arranged in the receiving groove, the elastic member is installed in the shell and connected to the sphere, and the sphere extends out of the shell and abuts against the bottom plate.

3. The battery cell pre-pressing device according to claim 2, characterized in that: The bottom plate is provided with a limiting groove, and the ball is arranged to roll in the limiting groove. The limiting groove can limit the rolling direction of the ball, thereby limiting the push-pull direction of the pressure-bearing mechanism.

4. The battery cell pre-pressing device according to claim 1, characterized in that: The pad is provided with a through hole, and the base plate is provided with a threaded hole. The position of the through hole corresponds to the position of the threaded hole. The through hole is used for screws to pass through. The screws can cooperate with the threaded holes to make the pad fit with the base plate and fix the relative positions of the pad and the base plate.

5. The battery cell pre-pressing device according to claim 1, characterized in that: The pressure-bearing mechanism also includes a handle, a first fixed plate and a second fixed plate, the two pads are arranged between the first fixed plate and the second fixed plate, the first fixed plate is fixedly connected to one of the pads, and the second fixed plate is fixedly connected to the other pad, the handle is fixedly connected to a side of the first fixed plate away from the pad, and the first fixed plate and the second fixed plate are both spaced apart from the bottom plate.

6. The battery cell pre-pressing device according to claim 5, characterized in that: The bottom plate is provided with a positioning pin, and the positioning pin can abut against the second fixing plate to limit the extreme position of the pressure-bearing mechanism being pushed into the frame.

7. The battery cell pre-pressing device according to claim 5, characterized in that: The belt conveyor mechanism includes a first bracket, a second bracket, a first driving member, a driving wheel, a driven wheel and a transmission belt. The first driving member is installed on the first bracket and connected to the driving wheel. The driving wheel is rotatably connected to the first bracket. One end of the first bracket is fixedly connected to the first fixing plate, and the other end is fixedly connected to the second fixing plate. The driven wheel is rotatably connected to the second bracket. One end of the second bracket is fixedly connected to the first fixing plate, and the other end is fixedly connected to the second fixing plate. The first bracket and the second bracket are relatively arranged at two ends of the pad. The transmission belt is sleeved outside the driving wheel and the driven wheel to form an accommodating cavity.

8. The battery cell pre-pressing device according to claim 7, characterized in that: The pressure-bearing mechanism further comprises a pressure-bearing plate, one end of which is fixedly connected to one of the pads, and the other end of which is fixedly connected to the other pad. The pressure-bearing plate is arranged in the accommodating cavity.

9. The battery cell pre-pressing device according to any one of claims 1 to 8, characterized in that: The battery cell pre-pressing forming device also includes a driving mechanism and a pressure plate. The frame also includes a top plate arranged parallel to the bottom plate and spaced apart. The driving mechanism is mounted on the top plate and fixedly connected to the pressure plate. The position of the pressure plate corresponds to the position of the belt conveyor mechanism.

10. The battery cell pre-pressing device according to claim 9, characterized in that: The battery cell pre-pressing molding device also includes an air pump. The pressure plate is relatively arranged with a first side surface and a second side surface. The first side surface is provided with an air path channel, and the second side surface is provided with a plurality of air holes. The plurality of air holes are all connected to the air path channel, and the air path channel is connected to the air pump.

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