A battery cell extrusion device

Abstract

This invention provides a battery cell extrusion device, comprising a worktable, a battery cell supporting mechanism, a lower pressing mechanism, and an upper pressing mechanism. The battery cell supporting mechanism is disposed on the worktable and supports the battery cell; an upper pressing channel is formed through the battery cell supporting mechanism. The lower pressing mechanism is disposed above the battery cell supporting mechanism, and the upper pressing mechanism is configured to press the battery cell supported on the battery cell supporting mechanism downwards. The upper pressing mechanism is disposed below the battery cell supporting mechanism and is configured to press the battery cell supported on the battery cell supporting mechanism upwards via the upper pressing channel. Through the cooperation of the lower pressing mechanism and the upper pressing mechanism, the battery cell extrusion device of this invention can simultaneously extrude both the upper and lower sides of the battery cell, thereby ensuring balanced force on the upper and lower surfaces of the battery cell and reducing the extrusion loss rate of the battery cell.

Description

Technical Field

[0001] This invention relates to the field of lithium battery module production, specifically a cell extrusion device. Background Technology

[0002] With the rapid development of the automotive energy and electric vehicle industries, lithium batteries are being used more and more widely in new energy vehicles. Typically, a battery pack is formed by stacking several cells into a group and then encapsulating the cell modules. After stacking the cells, a cell extrusion device is usually used to compress them. Traditional cell extrusion devices typically compress the stacked cells by pressing them downwards on one side. During the extrusion process, the cells are easily damaged due to uneven stress, thus reducing the yield of the battery pack. Summary of the Invention

[0003] This invention addresses the aforementioned technical deficiencies of existing battery cell extrusion devices by providing a battery cell extrusion device that simultaneously extrudes both the upper and lower surfaces of the battery cell, thereby ensuring balanced force on the upper and lower surfaces and reducing the cell's pressure loss rate. The technical solution of this invention is as follows:

[0004] A battery cell extrusion device includes a worktable, a battery cell carrying mechanism, a lowering mechanism, and an uppering mechanism, wherein:

[0005] The cell support mechanism is set on the workbench and is used to support the cell. An upward pressure channel is formed on the cell support mechanism.

[0006] The pressing mechanism is located above the cell support mechanism, and the pressing mechanism is configured to press down on the cell supported on the cell support mechanism;

[0007] The pressing mechanism is located below the cell-carrying mechanism and is configured to press the cell carried on the cell-carrying mechanism upward through the pressing channel.

[0008] By coordinating the lower and upper pressing mechanisms, the cell extrusion device of the present invention can simultaneously extrude the upper and lower sides of the cell, thereby ensuring that the upper and lower surfaces of the cell are subjected to balanced forces and reducing the cell's pressure loss rate.

[0009] In some embodiments, the pressing mechanism includes a column, a lifting beam, a lifting beam drive mechanism, a lower extrusion section, and a pressure sensor, wherein: the columns are arranged in pairs on the worktable; the two ends of the lifting beam are slidably connected to a column; the lower extrusion section is connected to the lifting beam and located below the lifting beam, and a pressing end face for extruding the battery cell is formed on the lower extrusion section; the drive end of the lifting beam drive mechanism is connected to the lifting beam to drive the lifting beam to move up and down along the column, thereby driving the lower extrusion section to move synchronously; the pressure sensor is disposed between the drive end of the lifting beam drive mechanism and the lifting beam, and the pressure sensor is connected to the control system of the lifting beam drive mechanism. The pressure sensor is used to acquire pressure information and transmit the pressure information to the control system of the lifting beam drive mechanism.

[0010] A simple pressing mechanism is provided, which uses a lifting beam to drive the lower extrusion section downward, thereby pressing the battery cell downward. By installing a pressure sensor between the drive end of the lifting beam drive mechanism and the lifting beam, the pressure of the pressing mechanism can be monitored and adjusted, thus ensuring that the downward pressure of the pressing mechanism is kept within a reasonable range.

[0011] In some embodiments, the lower pressing part includes a base plate, a support plate, a support plate guide rod, and a support plate driving mechanism, wherein: the base plate is connected to the lifting beam via a connecting rod, and a plurality of first pressing plates are connected to the lower surface of the base plate; the support plate guide rod is connected between the lifting beam and the base plate, the support plate is slidably connected to the support plate guide rod, and a plurality of second pressing plates are connected to the lower surface of the support plate; the driving end of the support plate driving mechanism is connected to the support plate to drive the support plate to move up and down, and the support plate driving mechanism drives the support plate to move down until the lower end surface of the second pressing plate is flush with the lower end surface of the first pressing plate to form the pressing end surface.

[0012] With the cooperation of the first and second lower pressure plates, the lower extrusion section first presses the battery cell tightly by the first lower pressure plate, and then the second lower pressure plate continuously extrudes the battery cell downward, thereby improving the pressing effect of the lowering mechanism on the battery cell.

[0013] In some embodiments, the pressing mechanism further includes a support plate limiting mechanism connected to the lifting beam and located on both sides of the support plate. The support plate limiting mechanism includes a first roller bearing and a first roller bearing driving mechanism, wherein: the first roller bearing abuts against the lifting beam, and the driving end of the first roller bearing driving mechanism is connected to the first roller bearing to drive the first roller bearing to move toward or away from the support plate; when the support plate driving mechanism drives the support plate to move downward to a predetermined position, the first roller bearing driving mechanism drives the first roller bearing to move toward the support plate, so that the first roller bearing is supported between the lifting beam and the support plate.

[0014] By setting a support plate limiting mechanism, the second pressing plate is ensured to continuously and stably abut against the upper surface of the battery cell during the pressing process, thereby achieving continuous and stable pressing of the upper surface of the battery cell and further improving the pressing effect of the pressing mechanism on the battery cell.

[0015] In some embodiments, the pressing mechanism further includes a grating ruler disposed on the column. The grating ruler is connected to the control system of the lifting beam drive mechanism. The grating ruler is used to acquire the position information of the lifting beam in the vertical direction and send the acquired position information to the control system of the lifting beam drive mechanism.

[0016] By combining grating rulers and pressure sensors, the control system can determine whether the stacked battery cell modules supported on the battery cell carrier mechanism meet production requirements.

[0017] In some embodiments, the pressing mechanism includes a lifting guide mechanism, a lifting plate, a lifting plate driving mechanism, and an upper extrusion part, wherein: the lifting plate is slidably connected to the lifting guide mechanism; the upper extrusion part is connected to the lifting plate and located above the lifting plate, and an upper pressing end face for extruding the battery cell is formed on the upper extrusion part; the driving end of the lifting plate driving mechanism is connected to the lifting plate to drive the lifting plate to move up and down along the lifting guide mechanism; when the lifting plate driving mechanism drives the lifting plate to move upward, the upper extrusion part passes through the upper pressing channel and extrudes the battery cell carried on the battery cell carrying mechanism upward.

[0018] A simple pressing mechanism is provided, which uses a lifting plate to drive the upper pressing part to press upward, thereby achieving upward pressing of the battery cell.

[0019] In some embodiments, the upper pressing part includes a lifting plate, a lifting plate driving mechanism, a connecting guide block, and an upper pressure plate, wherein: the connecting guide block is connected to the lifting plate; the lifting plate is slidably connected to the connecting guide block, and a plurality of upper pressure plates are connected to the upper surface of the lifting plate; the driving end of the lifting plate driving mechanism is connected to the lifting plate to drive the lifting plate to move up and down.

[0020] By connecting the guide block and the upper pressure plate, during the extrusion process, the guide block first presses upward and supports the cell-bearing mechanism, and then the upper pressure plate extends upward. The upper end face of the cell-bearing mechanism and the upper end face of the upper pressure plate together press the cell upward, which improves the pressing effect of the upper pressure mechanism on the cell.

[0021] In some embodiments, the pressing mechanism further includes a lifting plate limiting mechanism connected to the lifting plate and located on both sides of the lifting plate. The lifting plate limiting mechanism includes a second roller bearing and a second roller bearing driving mechanism, wherein: the second roller bearing abuts against the lifting plate, and the driving end of the second roller bearing driving mechanism is connected to the second roller bearing to drive the second roller bearing to move toward or away from the lifting plate; when the lifting plate driving mechanism drives the lifting plate to move upward to a predetermined position, the second roller bearing driving mechanism drives the second roller bearing to move toward the lifting plate, so that the second roller bearing is supported between the lifting plate and the lifting plate.

[0022] By setting a lifting plate limiting mechanism, the upper pressure plate is ensured to continuously and stably abut against the lower end face of the battery cell during the extrusion process, further improving the extrusion effect of the upper pressure mechanism on the battery cell.

[0023] In some embodiments, the pressing mechanism further includes a lifting plate limiting mechanism connected to the worktable and located on the side of the lifting plate. The lifting plate limiting mechanism includes a wedge block and a wedge block driving mechanism, wherein: the wedge block is slidably connected to the worktable, and the driving end of the wedge block driving mechanism is connected to the wedge block to drive the wedge block to move toward or away from the lifting plate; when the lifting plate driving mechanism drives the lifting plate to move upward to a predetermined position, the wedge block driving mechanism drives the wedge block to move toward the lifting plate, so that the wedge block is supported between the lifting plate and the worktable.

[0024] By setting up a lifting plate limiting mechanism, the connecting guide block can provide continuous and stable support to the battery cell carrying mechanism during the extrusion process, thereby ensuring that the upper end face of the battery cell carrying mechanism continuously and stably abuts against the lower end face of the battery cell, further improving the extrusion effect of the pressing mechanism on the battery cell.

[0025] In some embodiments, the cell carrying mechanism includes a turntable and a carrier member, and the cell extrusion device further includes a cell stacking mechanism, wherein: the turntable includes a turntable support plate and a rotary drive mechanism for driving the turntable support plate to rotate, and the turntable support plate is provided with a turntable through slot; the carrier member is disposed on the turntable support plate and located above the turntable through slot, the upper end of the carrier member forms a cell carrying surface for carrying the cell, and a plurality of carrier through slots are formed on the carrier member, the carrier through slots and the turntable through slots are vertically connected to form an upper pressure channel; the turntable support plate rotates under the drive of the rotary drive mechanism to drive the carrier member to rotate, and the rotation path of the carrier member is provided with at least a cell stacking station and a cell extrusion station, the cell stacking mechanism is configured to stack the cells onto the carrier member that has rotated to the cell stacking station, the lower pressure mechanism is configured to press the cells mounted on the carrier member that has rotated to the cell extrusion station downwards, and the upper pressure mechanism is configured to press the cells mounted on the carrier member that has rotated to the cell extrusion station upwards.

[0026] By rotating the carrier between the cell stacking station and the cell extrusion station using a turntable, this invention enables automatic cell stacking before cell extrusion, thereby improving production efficiency.

[0027] In some embodiments, the cell extrusion device further includes a lifting mechanism and a laser displacement sensor, wherein: the lifting mechanism is disposed at the cell stacking station and located below the turntable, and is configured to lift the carrier rotating to the cell stacking station upward through the turntable slot to drive the cells carried on the carrier to be lifted upward; the laser displacement sensor is disposed at the cell stacking station and located above the carrier, and is connected to the control system of the lifting mechanism, and is configured to acquire the height information of the cells carried on the carrier rotating to the cell stacking station, and transmit the acquired height information to the control system of the lifting mechanism, and the control system of the lifting mechanism controls the lifting mechanism to lift the carrier upward based on the acquired height information.

[0028] By setting up a lifting mechanism, the vertical height of the upper surface of the battery cell supported on the support can be adjusted in real time during the cell stacking process. By setting up a laser displacement sensor, the vertical height of the upper surface of the battery cell supported on the support can be obtained, thereby realizing the vertical height adjustment of the upper surface of the battery cell supported on the support by the lifting mechanism.

[0029] In some embodiments, the cell extrusion device further includes a cell pressing mechanism disposed on the turntable support plate and located on the side of the support member. When the turntable support plate drives the support member to rotate, the cell pressing mechanism is configured to press the cell carried on the support member onto the support member. The cell extrusion device also includes a process plate storage mechanism and a process plate loading mechanism, wherein: the process plate storage mechanism is used to store the process plate, and the process plate loading mechanism is configured to pick up the process plate from the process plate storage mechanism and place the picked-up process plate onto the cell support surface of the support member that is rotated to the cell stacking station or stacked onto the upper end surface of the cell after stacking.

[0030] By setting up a cell clamping mechanism, the stacked cells are clamped together to prevent them from slipping off the turntable support plate during rotation. By setting up a process board storage mechanism and a process board loading mechanism, the process boards can be stored nearby and automatically loaded, further improving production efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention from one perspective;

[0032] Figure 2 This is a structural schematic diagram of the present invention from another perspective;

[0033] Figure 3 This is a schematic diagram of the pressing mechanism in this invention;

[0034] Figure 4 This is a schematic diagram of the downward pressing mechanism in this invention after omitting the lifting beam drive structure and the column.

[0035] Figure 5 This is a schematic diagram of the upper pressure mechanism in this invention;

[0036] Figure 6 This is a schematic diagram of the cooperation structure between some components of the pressing mechanism and the worktable in this invention;

[0037] Figure 7 This is a schematic diagram of the turntable structure in this invention;

[0038] Figure 8 This is a schematic diagram of the structure of the carrier component in this invention;

[0039] Figure 9 This is a schematic diagram of the lifting mechanism in this invention;

[0040] Figure 10 This is a schematic diagram of the battery cell clamping mechanism in this invention;

[0041] Figure 11 This is a schematic diagram of the process plate material storage mechanism in this invention. Detailed Implementation

[0042] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Traditional cell extrusion devices typically compress stacked cells by pressing them downwards on one side. During the extrusion process, cells are easily damaged due to uneven stress, thus reducing the yield of battery packs.

[0044] This invention provides a battery cell extrusion device that can simultaneously extrude the upper and lower sides of the battery cell, thereby balancing the force on the upper and lower surfaces of the battery cell and significantly reducing the extrusion loss rate of the battery cell.

[0045] like Figures 1 to 2 As shown, the battery cell extrusion device of the present invention includes at least a worktable 100, a battery cell carrying mechanism, a lowering mechanism 200, and an uppering mechanism 300. Wherein:

[0046] The cell support mechanism is set on the worktable 100. The cell support mechanism is used to support the cell and has an upper pressure channel.

[0047] The pressing mechanism 200 is disposed above the cell support mechanism, and the pressing mechanism 200 is configured to press down on the cell supported on the cell support mechanism.

[0048] The pressing mechanism 300 is located below the cell support mechanism. The pressing mechanism 300 is configured to press the cell supported on the cell support mechanism upward through the pressing channel.

[0049] By cooperating with the lower pressing mechanism 200 and the upper pressing mechanism 300, the cell extrusion device of the present invention can simultaneously extrude force on both the upper and lower sides of the cell, thereby ensuring balanced force on the upper and lower surfaces of the cell and reducing the cell's pressure loss rate. The upper pressing mechanism 300 cooperates with the lower pressing mechanism 200 to extrude the cell through the upper pressing channel on the cell carrying mechanism, ensuring that the cell carrying mechanism is not subjected to force when the upper pressing mechanism 300 and the lower pressing mechanism 200 are extruding the cell.

[0050] like Figure 3 As shown, in some embodiments, the pressing mechanism 200 includes two paired columns 201, a lifting beam 202, a lifting beam drive mechanism 203, and a lower pressing section. Specifically, the two ends of the lifting beam 202 are slidably connected to one of the columns 201, and the lower pressing section is connected to the lifting beam 202 and located below it. The lower pressing section has a pressing end face for pressing the battery cell. The drive end of the lifting beam drive mechanism 203 is connected to the lifting beam 202 to drive the lifting beam 202 to move up and down along the columns 201, thereby causing the lower pressing section to move synchronously.

[0051] When it is necessary to compress the battery cell supported on the battery cell carrier mechanism, the lifting beam drive mechanism 203 drives the lifting beam 202 to move downward and simultaneously moves the lower compression part downward. The lower compression part abuts against the upper end face of the battery cell and compresses the battery cell downward. After the battery cell compression is completed, the lifting beam drive mechanism 203 drives the lifting beam 202 to move the lower compression part upward and reset it, and the lower compression part leaves the battery cell.

[0052] like Figure 3 As shown, optionally, the pressing mechanism 200 also includes a pressure sensor 213 disposed between the drive end of the lifting beam drive mechanism 203 and the lifting beam 202. The pressure sensor 213 is connected to the control system of the lifting beam drive mechanism 203. The pressure sensor 213 is used to acquire pressure information and transmit the pressure information to the control system of the lifting beam drive mechanism 203. The lifting beam drive mechanism 203 drives the lifting beam 202 to move based on the pressure information to achieve pressure regulation.

[0053] By setting a pressure sensor 213, the downward pressure of the pressing mechanism 200 can be monitored. During the cell extrusion process, when the pressure is less than the preset target pressure, the lifting beam drive mechanism 203 drives the lifting beam 202 to move further downward to increase the pressure and ensure the extrusion effect of the lower extrusion section on the cell. When the pressure exceeds the preset target pressure, the lifting beam drive mechanism 203 controls the lifting beam 202 to stop moving downward or upward to prevent the lower extrusion section from damaging the cell.

[0054] In a specific embodiment, the battery cell module is formed by stacking a predetermined number of battery cells. Therefore, if the number of battery cells stacked is correct, the height of the upper surface of the stacked battery cells in the vertical direction is determined. Correspondingly, during the extrusion process, the target position of the lifting beam 202 in the vertical direction is determined.

[0055] Therefore, if the number of battery cells stacked is correct, when the lifting beam 202 moves down to the target position, the pressing mechanism will press down on the battery cells with the target pressure corresponding to that target position. Based on this, optionally, the pressing mechanism 200 also includes a grating ruler 214 mounted on the column 201. The grating ruler 214 is connected to the control system of the lifting beam drive mechanism 203. The grating ruler 214 is used to acquire the vertical position information of the lifting beam 202 and send the acquired position information to the control system of the lifting beam drive mechanism 203.

[0056] The control system determines whether the battery cells on the battery cell support mechanism are stacked incorrectly based on the current actual pressure information obtained by the pressure sensor 213 and the current actual position information of the lifting beam 202 obtained by the grating ruler 214.

[0057] For example, in some embodiments, after the control lifting beam 202 moves down to the target position, the control system first compares the actual position of the lifting beam 202 obtained by the grating ruler 214 with the target position. If the actual position of the lifting beam 202 is the same as the target position, the control system compares the current pressure obtained by the pressure sensor 213 with the target pressure. If the current pressure is equal to the target pressure, it indicates that the thickness of the stacked cells is reasonable, that is, the number of cells stacked is correct. If the current pressure is greater than the target pressure, it indicates that the thickness of the stacked cells is too thick, that is, the number of cells is more than the predetermined number. If the current pressure is less than the target pressure, it indicates that the thickness of the stacked cells is too thin, that is, the number of cells is less than the predetermined number.

[0058] For example, in some other embodiments, during the extrusion process, after the control lifting beam 202 moves down to the target position, the control system first compares the relationship between the current pressure obtained by the pressure sensor 213 and the target pressure. If the current pressure is equal to the target pressure, the control system compares the actual position of the lifting beam 202 obtained by the grating ruler 214 with the target position. If the actual position is the same as the target position, it indicates that the thickness of the stacked battery cells is reasonable, that is, the battery cells are stacked correctly. If the actual position is higher than the target position, it indicates that the thickness of the stacked battery cells is too thick, that is, the number of battery cells is more than the predetermined number. If the actual position is lower than the target position, it indicates that the thickness of the stacked battery cells is too thin, that is, the number of battery cells is less than the predetermined number.

[0059] Optionally, if the number of battery cells is more or less than a predetermined number, the control system is configured to issue an alarm signal.

[0060] like Figure 4 As shown, optionally, the lower extrusion section includes a base plate 204, a support plate 205, a support plate guide rod 206, and a support plate drive mechanism 207. Specifically: the base plate 204 is connected to the lifting beam 202 via a connecting rod 208, and a plurality of first lower pressure plates 209 are connected to the lower surface of the base plate 204. The support plate guide rod 206 connects between the lifting beam 202 and the base plate 204, and the support plate 205 is slidably connected to the support plate guide rod 206. A plurality of second lower pressure plates 210 penetrating the base plate 204 are connected to the lower surface of the support plate 205. The drive end of the support plate drive mechanism 207 is connected to the support plate 205 to drive the support plate 205 to move up and down.

[0061] When the support plate drive mechanism 207 drives the support plate 205 to move downward to a predetermined position, the lower end face of the second lower pressure plate 210 is flush with the lower end face of the first lower pressure plate 209, thereby forming the lower pressure end face of the lower extrusion part.

[0062] In some embodiments, the extrusion process of the lower extrusion section on the battery cell is as follows:

[0063] In the initial state, the lower end face of the second lower pressure plate 210 is higher than the lower end face of the first lower pressure plate 209, that is, the second lower pressure plate 210 retracts upward into the gap between the first lower pressure plate 209. During the cell extrusion process, driven by the lifting beam 202, the first lower pressure plate 209 first contacts the upper end face of the cell and extrudes downward, thereby pressing the cell tightly and preventing it from shifting or tilting. Then, the support plate drive mechanism 207 drives the support plate 205 to move downward, and the second lower pressure plate 210 abuts against the upper end face of the cell and continues to extrude downward along with the first lower pressure plate 209.

[0064] After the cell extrusion is completed, the support plate drive mechanism 207 drives the support plate 205 to move upward. The second lower pressure plate 210 leaves the upper end face of the cell and retracts to between the first lower pressure plate 209. At this time, a gap is left between the first lower pressure plates 209, which makes it convenient for the robot to take out the extruded cell. After the cell is taken out, the lifting beam 202 moves upward, driving the entire lower extrusion part to move upward and reset.

[0065] like Figure 4 As shown, optionally, the pressing mechanism 200 further includes a support plate limiting mechanism connected to the lifting beam 202 and located on both sides of the support plate 205. This support plate limiting mechanism includes a first roller bearing 211 and a first roller bearing drive mechanism 212. The first roller bearing 211 rests against the lower surface of the lifting beam 202. The drive end of the first roller bearing drive mechanism 212 is connected to the first roller bearing 211 to drive the first roller bearing 211 to move towards or away from the support plate 205. When the support plate drive mechanism 207 drives the support plate 205 downward to a predetermined position, the first roller bearing drive mechanism 212 drives the first roller bearing 211 to move towards the support plate 205, so that the first roller bearing 211 is supported between the lifting beam 202 and the support plate 205. The use of the first roller bearing 211 reduces the friction between the support plate limiting mechanism and the lower surface of the lifting beam 202, facilitating the movement of the support plate limiting mechanism along the lifting beam 202.

[0066] During the extrusion process of the battery cell, the support plate drive mechanism 207 drives the support plate 205 to move downward. When the second lower pressure plate 210 abuts against the upper surface of the battery cell, the first roller bearing drive mechanism 212 then drives the first roller bearing 211 to move towards the support plate 205. The first roller bearing 211 enters the space between the lifting beam 202 and the support plate 205 and is supported between them. In this way, during the extrusion process, the second lower pressure plate 210 can continuously and stably abut against the upper surface of the battery cell, thereby achieving continuous and stable extrusion of the upper surface of the battery cell and further improving the extrusion effect.

[0067] like Figures 5 to 6 As shown, in some embodiments, the upper pressing mechanism 300 includes a lifting guide mechanism 301, a lifting plate 302, a lifting plate driving mechanism 303, and an upper pressing part. Wherein:

[0068] The lifting plate 302 is slidably connected to the lifting guide mechanism 301, and the upper extrusion part is connected to the lifting plate 302 and located above the lifting plate 302. An upper pressing end face for extruding the battery cell is formed on the upper extrusion part.

[0069] The driving end of the lifting plate drive mechanism 303 is connected to the lifting plate 302 to drive the lifting plate 302 to move up and down along the lifting guide mechanism 301.

[0070] When the lifting plate drive mechanism 303 drives the lifting plate 302 to move upward to the predetermined position, the upper extrusion part passes through the upper pressure channel on the cell carrier mechanism and extrudes the cell carried on the cell carrier mechanism upward.

[0071] When it is necessary to compress the battery cell supported on the battery cell carrier mechanism, the lifting plate drive mechanism 303 drives the lifting plate 302 to move upward and simultaneously moves the upper compression part upward. During this process, the upper compression part passes through the upper pressure channel on the battery cell carrier mechanism and abuts against the lower end face of the battery cell, thereby compressing the battery cell. After the battery cell compression is completed, the lifting plate drive mechanism 303 drives the lifting plate 302 to move the upper compression part downward to reset, and the upper compression part leaves the battery cell.

[0072] like Figure 5 As shown, optionally, the lifting guide mechanism 301 includes a bracket 3011, with lifting guide rails 3012 extending vertically on both sides of the bracket 3011. Lifting sliders 3013, capable of sliding up and down along the lifting guide rails 3012, are mounted on the lifting guide rails 3012. The lifting plate 302 is slidably connected to the bracket 3031 via two lifting sliders 3013. Driven by the lifting plate drive mechanism 303, the lifting plate 302 moves up and down along the lifting guide rails 3012. By setting two sets of lifting guide rails 3012 and lifting sliders 3013, the guiding effect of the lifting guide mechanism 301 on the lifting plate 302 can be improved, achieving smooth lifting and lowering of the lifting plate 302 in the vertical direction.

[0073] Of course, the lifting guide mechanism 301 can also adopt other known structures, such as a guide rod set in the vertical direction, with the lifting plate 302 slidably connected to the guide rod. Under the drive of the lifting plate drive mechanism 303, the lifting plate 302 moves up and down along the guide rod.

[0074] like Figure 5 As shown, optionally, the upper pressing section includes a lifting plate 304, a lifting plate drive mechanism 305, a connecting guide block 306, and an upper pressure plate 307. The connecting guide block 306 is connected to the lifting plate 302. The lifting plate 304 is slidably connected to the connecting guide block 306, and a plurality of upper pressure plates 307 are connected to the upper surface of the lifting plate 304. The drive end of the lifting plate drive mechanism 305 is connected to the lifting plate 304 to drive the lifting plate 304 to move up and down. When the lifting plate drive mechanism 305 drives the lifting plate 304 to move to a predetermined position, the upper end of the upper pressure plate 307 extends upward beyond the connecting guide block 306.

[0075] In some embodiments, the compression process of the upper extrusion section on the battery cell is as follows:

[0076] Initially, the upper end of the upper pressure plate 307 is located below the cell-bearing mechanism and at a certain distance from the cell to be extruded. During the cell extrusion process, the lifting plate 302 rises under the drive of the lifting plate drive mechanism 303. The connecting guide block 306 first contacts the cell-bearing mechanism and lifts it upward. The upper end face of the cell-bearing mechanism is pressed upward by the connecting guide block 306, squeezing the cell upward. Next, the lifting plate drive mechanism 305 drives the lifting plate 304 to move upward. The upper pressure plate 307, driven by the lifting plate 304, passes through the pressing channel and abuts against the lower end face of the cell, continuously squeezing the cell upward. At this time, the upper end face of the cell-bearing mechanism and the upper end face of the upper pressure plate 307 together form the upper pressing end face of the upper extrusion section.

[0077] After the cell extrusion is completed, the lifting plate drive mechanism 305 drives the lifting plate 304 to move downward, and the upper pressure plate 307 leaves the lower end face of the cell and retracts into the space between the guide blocks 306. At this time, the space occupied by the upper pressure plate 307 during the extrusion of the cell is freed up, making it easier for the robot to remove the extruded cell. After the robot removes the cell, the lifting plate 302 descends under the drive of the lifting plate drive mechanism 303 to drive the entire upper extrusion part to move down and reset.

[0078] In some embodiments, the cell support mechanism is provided with a positioning pin hole, and the upper end of the connecting guide block 306 is provided with a positioning pin 3061 that matches the pin hole. During the upward movement of the connecting guide block 306, the positioning pin 3061 on it is pushed into the positioning pin hole on the cell support mechanism.

[0079] Optionally, the pressing mechanism 300 further includes a lifting plate limiting mechanism connected to the lifting plate 302 and located on both sides of the lifting plate 304. The lifting plate limiting mechanism includes a second roller bearing 308 and a second roller bearing driving mechanism 309. Specifically, the second roller bearing 308 rests against the upper surface of the lifting plate 302, and the driving end of the second roller bearing driving mechanism 309 is connected to the second roller bearing 308 to drive the second roller bearing 308 to move towards or away from the lifting plate 304. When the lifting plate driving mechanism 305 drives the lifting plate 304 to a predetermined position, the second roller bearing driving mechanism 309 drives the second roller bearing 308 to move towards the lifting plate 304, so that the second roller bearing 308 is supported between the lifting plate 302 and the lifting plate 304. Similarly, the use of the second roller bearing 308 reduces the friction between the lifting plate limiting mechanism and the lifting plate 302, facilitating the movement of the lifting plate limiting mechanism along the lifting plate 302. During the extrusion process of the battery cell, the lifting plate drive mechanism 305 drives the lifting plate 304 to move upward. When the upper pressure plate 307 abuts against the lower end face of the battery cell under the action of the lifting plate 304, the second roller bearing drive mechanism 309 then drives the second roller bearing 308 to move towards the lifting plate 304. The second roller bearing 308 enters the space between the lifting plate 302 and the lifting plate 304 and is supported between the lifting plate 302 and the lifting plate 304. In this way, during the extrusion process, it can be ensured that the upper pressure plate 307 continuously and stably abuts against the lower end face of the battery cell, thereby achieving continuous and stable extrusion of the upper end face of the battery cell.

[0080] like Figure 6 As shown, optionally, the pressing mechanism 300 further includes a lifting plate limiting mechanism connected to the worktable 100 and located on the side of the lifting plate 302. The lifting plate limiting mechanism includes a wedge block 310 and a wedge block driving mechanism 311, wherein: the wedge block 310 is slidably connected to the worktable 100, and the driving end of the wedge block driving mechanism 311 is connected to the wedge block 310 to drive the wedge block 310 to move toward or away from the lifting plate 302. When the lifting plate driving mechanism 303 drives the lifting plate 302 to move upward to a predetermined position, the wedge block driving mechanism 311 drives the wedge block 310 to move toward the lifting plate 302, so that the wedge block 310 is supported between the lifting plate 302 and the worktable 100.

[0081] During the extrusion process of the battery cell, the lifting plate 302 rises under the drive of the lifting plate drive mechanism 303. When the connecting guide block 306 contacts the battery cell support mechanism, the wedge block drive mechanism 311 drives the wedge block 310 to move towards the lifting plate 302. The wedge block 310 enters the space between the lifting plate 302 and the worktable 100 and is supported between the lifting plate 302 and the worktable 100. In this way, during the extrusion process, the connecting guide block 306 can achieve continuous and stable extrusion of the battery cell support mechanism, and correspondingly, the upper surface of the battery cell support mechanism can achieve continuous and stable extrusion of the battery cell.

[0082] like Figure 1 , Figures 7-8 As shown, optionally, the cell carrying mechanism includes a turntable 400 and a carrier component 500, wherein:

[0083] The turntable 400 includes a turntable support plate 401 and a rotation drive mechanism 402 for driving the turntable support plate 401 to rotate. The turntable support plate 401 is provided with a turntable through groove 403 that penetrates the turntable support plate 401. Preferably, a turntable through groove 403 is provided at each end of the turntable support plate 401.

[0084] The carrier member 500 is supported on the turntable support plate 401 and located above the turntable through groove 403. Preferably, two carrier members 500 are provided, and the two carrier members 500 are respectively located on the two turntable through grooves 403 at both ends of the turntable support plate 401. The upper end of the carrier member 500 forms a cell support surface for supporting the cell. Several carrier member through grooves 501 are formed on the carrier member 500, and the carrier member through grooves 501 and the turntable through grooves 403 below them are vertically connected to form an upper pressure channel.

[0085] The turntable support plate 401 rotates under the drive of the rotary drive mechanism 402 to drive the support member 500 to rotate. The rotation path of the support member 500 is provided with at least a cell stacking station and a cell extrusion station.

[0086] When the carrier 500 rotates to the cell stacking station, several cells are stacked onto the carrier 500 that has rotated to the cell stacking station.

[0087] When the carrier 500 rotates to the cell extrusion station carrying the stacked cells, the pressing mechanism 200 presses down on the upper end face of the cell, and the pressing mechanism 300 simultaneously presses up on the lower end face of the cell.

[0088] As mentioned above, in some embodiments, the upper pressing mechanism 300 includes a lifting guide mechanism 301, a lifting plate 302, a lifting plate drive mechanism 303, and an upper pressing section. The upper pressing section includes a lifting plate 304, a lifting plate drive mechanism 305, a connecting guide block 306, and an upper pressing plate 307. In these embodiments, the pressing process of the upper pressing section on the battery cell is as follows:

[0089] Driven by the lifting plate drive mechanism 303, the lifting plate 302 rises, and the connecting guide block 306 passes through the turntable through groove 403 on the turntable support plate 401 and presses upward against the support member 500. Under the pressure of the connecting guide block 306, the cell support surface of the support member 500 presses upward against the cell. Next, the lifting plate drive mechanism 305 drives the lifting plate 304 to move upward. Driven by the lifting plate 304, the upper pressure plate 307 passes through the support member through groove 501 on the support member 500 and abuts against the lower end face of the cell, continuously pressing upward against the cell.

[0090] As can be seen, in these embodiments, the cell-bearing surface of the carrier 500 and the upper end surface of the upper pressure plate 307 together form the upper pressure end surface of the upper extrusion part.

[0091] The turntable through slot 403 ensures that the turntable 400 is not subjected to force when the upper pressing mechanism 300 and the lower pressing mechanism 200 are pressing the battery cell, and the normal stacking of battery cells at the battery cell stacking station on the turntable 400 is not affected by the force on the turntable 400.

[0092] After the cell extrusion is completed, the lifting plate drive mechanism 305 drives the lifting plate 304 to move downward, and the upper pressure plate 307 leaves the lower end face of the cell and retracts into the space between the guide blocks 306. At this time, the space occupied by the upper pressure plate 307 during the extrusion of the cell is freed up, making it easier for the robot to remove the extruded cell. After the robot removes the cell, the lifting plate 302 descends under the drive of the lifting plate drive mechanism 303 to drive the entire upper extrusion part to move down and reset.

[0093] To achieve automatic stacking of battery cells, the present invention optionally includes a battery cell stacking mechanism and a battery cell storage mechanism for storing battery cells. The battery cell stacking mechanism picks up battery cells one by one from the battery cell storage mechanism and stacks the picked-up battery cells sequentially onto the carrier 500 that has been rotated to the battery cell stacking station.

[0094] Optionally, the present invention also includes a lifting mechanism 600 that cooperates with the cell stacking mechanism. During the stacking process, the lifting mechanism 600 lifts the support member 500, and can adjust the height of the upper end face of the cell supported on the support member 500 in the vertical direction in real time during the cell stacking process.

[0095] like Figure 9 As shown, in some embodiments, the lifting mechanism 600 includes a lifting plate 601 and a lifting drive mechanism 602. The lifting plate 601 is connected to the drive end of the lifting drive mechanism 602. When the lifting drive mechanism 602 drives the lifting plate 601 to move upward, the lifting plate 601 passes through the turntable through groove 403 on the turntable support plate 401 and contacts the support member 500, lifting the support member 500 upward. The support member 500 leaves the turntable support plate 401 and moves upward under the lifting of the lifting plate 601.

[0096] Optionally, a positioning pin 603 matching the positioning pin hole at the bottom of the support member 500 may be provided on the upper surface of the lifting plate 601. During the lifting process, the positioning pin 603 on the lifting plate 601 is pushed into the positioning pin hole at the bottom of the support member 500.

[0097] like Figure 1 As shown, optionally, the present invention also includes a laser displacement sensor 700 disposed at the cell stacking station and above the carrier 500, the laser displacement sensor 700 being connected to the control system of the lifting mechanism 600. The laser displacement sensor 700 is configured to acquire the height information of the cells carried on the carrier 500 rotated to the cell stacking station, and transmit the acquired height information to the control system of the lifting mechanism 600. The control system of the lifting mechanism 600 controls the lifting mechanism to lift upward based on the acquired height information, thereby ensuring that the upper end face of the cells on the carrier 500 reaches a predetermined target position close to the cells to be stacked.

[0098] After the battery cells are stacked, the turntable support plate 401 rotates the support member 500, which carries the stacked battery cells, to the battery cell extrusion station. The lower pressing mechanism 200 and the upper pressing mechanism 300 work together to extrude the stacked battery cells, wherein: the lower pressing mechanism 200 presses downward on the upper end face of the battery cell; the upper pressing mechanism 300, together with the battery cell support surface of the support member 500, presses upward on the lower end face of the battery cell.

[0099] Optionally, the present invention also includes a cell unloading mechanism, which removes the extruded cell from the carrier 500 and transfers it to the next process.

[0100] When both ends of the turntable bearing plate 401 are equipped with bearing members 500, when one bearing member 500 rotates to the cell stacking station, the other bearing member 500 rotates to the cell extrusion station. In this way, cell stacking and cell extrusion can be completed simultaneously, significantly improving work efficiency.

[0101] Considering that the stacked battery cells supported on the carrier 500 are prone to slipping when the turntable carrier plate 401 drives the carrier 500 to rotate, the present invention also includes a battery cell clamping mechanism 800 disposed on the turntable carrier plate 401 and located on the side of the carrier 500.

[0102] When the turntable bearing plate 401 drives the bearing member 500 carrying the battery cell to rotate, the battery cell pressing mechanism 800 is configured to press the battery cell carried on the bearing member 500 onto the bearing member 500.

[0103] like Figure 10As shown, optionally, the cell clamping mechanism 800 includes a lifting base plate 801, a lifting base plate lifting mechanism 802, a pressure plate 803, and a pressure plate translation drive mechanism 804. Specifically: the lifting base plate lifting mechanism 802 is connected to the turntable support plate 401, and the lifting base plate 801 is connected to the drive end of the lifting base plate lifting mechanism 802, which drives the lifting base plate 801 to move up and down. The pressure plate 803 is slidably connected to the lifting base plate 801, and the drive end of the pressure plate translation drive mechanism 804 is connected to the pressure plate 803 to drive the pressure plate 803 to move towards or away from the support member 500.

[0104] Before cell stacking, the lifting base plate lifting mechanism 802 drives the lifting base plate 801 to move upward to a high position, and the pressure plate translation driving mechanism 804 drives the pressure plate 803 to move away from the support member 500, and the pressure plate 803 retracts into the surface of the lifting base plate 801. After the cell stacking is completed, the pressure plate translation driving mechanism 804 drives the pressure plate 803 to move towards the support member 500 so that the pressure plate 803 extends outward from the lifting base plate 801, and the lifting base plate lifting mechanism 802 drives the lifting base plate 801 to move downward until the pressure plate 803 presses on the upper surface of the stacked cells.

[0105] In some embodiments, before stacking the battery cells, a process board needs to be pre-placed on the battery cell bearing surface of the carrier 500. After the battery cell stacking is completed, another process board is then stacked on the top surface of the stacked battery cells. Therefore, as... Figure 2 As shown, optionally, the present invention also includes a process board loading mechanism and a process board storage mechanism 900 disposed on the worktable 100. The process board storage mechanism 900 is used to store process boards, and the process board loading mechanism is configured to place the process board onto the cell bearing surface of the carrier 500 or the upper end surface of stacked cells.

[0106] Optional, such as Figure 11 As shown, the process plate storage mechanism 900 includes a support frame 901, a bearing plate 902, and a leveling plate 903, wherein the bearing plate 902 is connected to the support frame 901, and the leveling plate 903 is disposed on the bearing plate 902. Process plates are stacked on the bearing plate 902, and the leveling plate 903 moves under the drive of a leveling cylinder 904 to level the process plates.

[0107] The present invention has been described above in sufficient detail and with certain specificities. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of the invention should fall within the protection scope of the invention. The scope of protection claimed by the present invention is defined by the claims, and not by the above descriptions in the embodiments.

Claims

1. A battery cell extrusion device, characterized in that: The battery cell extrusion device includes a worktable, a battery cell carrying mechanism, a lower pressing mechanism, and an upper pressing mechanism, wherein: The cell support mechanism is disposed on the workbench, and the cell support mechanism is used to support the cell. An upward pressure channel is formed on the cell support mechanism. The pressing mechanism is located above the cell support mechanism, and the pressing mechanism is configured to press down on the cell supported on the cell support mechanism; The pressing mechanism is located below the cell-carrying mechanism, and the pressing mechanism is configured to press the cell carried on the cell-carrying mechanism upward through the pressing channel; The cell-carrying mechanism includes a turntable and a carrier component, and the cell-extrusion device further includes a cell-stacking mechanism, wherein: The turntable includes a turntable support plate and a rotation drive mechanism for driving the turntable support plate to rotate. The turntable support plate is provided with a turntable through groove that penetrates the turntable support plate. The carrier is disposed on the turntable support plate and located above the turntable through slot. The upper end of the carrier forms a cell support surface for supporting the cell. A plurality of carrier through slots are formed on the carrier, and the carrier through slots and the turntable through slots are vertically connected to form the upper pressure channel. The turntable support plate rotates under the drive of the rotary drive mechanism to drive the support member to rotate. The rotation path of the support member is provided with at least a cell stacking station and a cell extrusion station. The cell stacking mechanism is configured to stack the cells onto the support member that has rotated to the cell stacking station. The pressing mechanism is configured to press down on the cells supported on the support member that has rotated to the cell extrusion station. The pressing mechanism is configured to press up on the cells supported on the support member that has rotated to the cell extrusion station.

2. The cell extrusion apparatus as described in claim 1, characterized in that, The pressing mechanism includes a column, a lifting beam, a lifting beam drive mechanism, a pressing section, and a pressure sensor, wherein: The columns are arranged in pairs on the workbench; The two ends of the lifting beam are respectively slidably connected to one of the columns; The lower extrusion section is connected to the lifting beam and located below the lifting beam. The lower extrusion section has a pressing end face for extruding the battery cell. The drive end of the lifting beam drive mechanism is connected to the lifting beam to drive the lifting beam to move up and down along the column, thereby driving the lower extrusion part to move synchronously. The pressure sensor is disposed between the drive end of the lifting beam drive mechanism and the lifting beam. The pressure sensor is connected to the control system of the lifting beam drive mechanism. The pressure sensor is used to acquire pressure information and transmit the pressure information to the control system of the lifting beam drive mechanism.

3. The cell extrusion apparatus as described in claim 2, characterized in that, The lower extrusion section includes a base plate, a support plate, a support plate guide rod, and a support plate drive mechanism, wherein: The base plate is connected to the lifting beam via a connecting rod, and a plurality of first pressure plates are connected to the lower surface of the base plate; The support plate guide rod is connected between the lifting beam and the base plate, the support plate is slidably connected to the support plate guide rod, and a plurality of second pressure plates are connected to the lower surface of the support plate; The drive end of the support plate drive mechanism is connected to the support plate to drive the support plate to move up and down. The support plate drive mechanism drives the support plate to move down until the lower end surface of the second lower pressure plate is flush with the lower end surface of the first lower pressure plate to form the lower pressure end surface.

4. The cell extrusion apparatus as described in claim 3, characterized in that, The pressing mechanism further includes a support plate limiting mechanism connected to the lifting beam and located on both sides of the support plate. The support plate limiting mechanism includes a first roller bearing and a first roller bearing driving mechanism, wherein: The first roller bearing rests against the lifting beam, and the drive end of the first roller bearing drive mechanism is connected to the first roller bearing to drive the first roller bearing to move toward or away from the support plate. When the support plate drive mechanism drives the support plate to move downward to a predetermined position, the first roller bearing drive mechanism drives the first roller bearing to move toward the support plate, so that the first roller bearing is supported between the lifting beam and the support plate.

5. The cell extrusion apparatus as described in claim 2, characterized in that, The pressing mechanism also includes a grating ruler mounted on the column. The grating ruler is connected to the control system of the lifting beam drive mechanism. The grating ruler is used to acquire the vertical position information of the lifting beam and send the acquired position information to the control system of the lifting beam drive mechanism.

6. The cell extrusion apparatus as described in claim 1, characterized in that, The upper pressing mechanism includes a lifting guide mechanism, a lifting plate, a lifting plate drive mechanism, and an upper pressing section, wherein: The lifting plate is slidably connected to the lifting guide mechanism; The upper extrusion section is connected to the lifting plate and located above the lifting plate, and an upper pressing end face for extruding the battery cell is formed on the upper extrusion section; The driving end of the lifting plate driving mechanism is connected to the lifting plate to drive the lifting plate to move up and down along the lifting guide mechanism; When the lifting plate driving mechanism drives the lifting plate to move upward, the upper pressing part passes through the upper pressing channel and presses upward the battery cell carried on the battery cell carrying mechanism.

7. The cell extrusion apparatus as described in claim 6, characterized in that, The upper extrusion section includes a lifting plate, a lifting plate drive mechanism, a connecting guide block, and an upper pressure plate, wherein: The connecting guide block is connected to the lifting plate; The lifting plate is slidably connected to the connecting guide block, and a plurality of upper pressure plates are connected to the upper surface of the lifting plate; The drive end of the lifting plate drive mechanism is connected to the lifting plate to drive the lifting plate to move up and down.

8. The cell extrusion apparatus as described in claim 7, characterized in that, The pressing mechanism further includes a lifting plate limiting mechanism connected to the lifting plate and located on both sides of the lifting plate. The lifting plate limiting mechanism includes a second roller bearing and a second roller bearing drive mechanism, wherein: The second roller bearing rests against the lifting plate, and the drive end of the second roller bearing drive mechanism is connected to the second roller bearing to drive the second roller bearing to move toward or away from the lifting plate; When the lifting plate drive mechanism drives the lifting plate to move upward to a predetermined position, the second roller bearing drive mechanism drives the second roller bearing to move toward the lifting plate, so that the second roller bearing is supported between the lifting plate and the lifting plate.

9. The cell extrusion apparatus as described in claim 6, characterized in that, The pressing mechanism further includes a lifting plate limiting mechanism connected to the worktable and located on the side of the lifting plate. The lifting plate limiting mechanism includes a wedge block and a wedge block driving mechanism, wherein: The wedge block is slidably connected to the worktable, and the drive end of the wedge block drive mechanism is connected to the wedge block to drive the wedge block to move toward or away from the lifting plate; When the lifting plate driving mechanism drives the lifting plate to move upward to a predetermined position, the wedge block driving mechanism drives the wedge block to move toward the lifting plate, so that the wedge block is supported between the lifting plate and the worktable.

10. The cell extrusion apparatus as described in claim 1, characterized in that, The cell extrusion device further includes a lifting mechanism and a laser displacement sensor, wherein: The lifting mechanism is located at the cell stacking station and below the turntable. The lifting mechanism is configured to lift and rotate upward through the turntable slot to the carrier at the cell stacking station so as to drive the cells supported on the carrier to be lifted upward. The laser displacement sensor is disposed at the cell stacking station and above the carrier. The laser displacement sensor is connected to the control system of the lifting mechanism. The laser displacement sensor is configured to acquire the height information of the cells carried on the carrier rotated to the cell stacking station, and transmit the acquired height information to the control system of the lifting mechanism. The control system of the lifting mechanism controls the lifting mechanism to lift the carrier upward based on the acquired height information.

11. The cell extrusion apparatus as described in claim 1, characterized in that, The cell extrusion device further includes a cell pressing mechanism disposed on the turntable support plate and located on the side of the support member. When the turntable support plate drives the support member to rotate, the cell pressing mechanism is configured to press the cell carried on the support member onto the support member. The cell extrusion device further includes a process plate storage mechanism and a process plate loading mechanism, wherein: the process plate storage mechanism is used to store process plates, and the process plate loading mechanism is configured to pick up process plates from the process plate storage mechanism and place the picked-up process plates onto the cell bearing surface of the carrier rotating to the cell stacking station or stack them onto the upper surface of the cell after stacking.

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