Battery cell liquid injection flaring mechanism for lithium battery production line

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a battery cell liquid injection flaring mechanism for a lithium battery production line, which comprises an engine base, a workbench arranged on the engine base, two opposite mounting plates arranged at the top of the workbench, and a channel formed between the two mounting plates and used for placing a battery cell, a clamping block is rotationally arranged at the position, corresponding to the battery cell placement position, of each mounting plate, an elastic piece is arranged in each clamping block, and the elastic pieces are used for providing restoring force for the clamping blocks to rotate close to the channel; the pre-expanding mechanism is arranged on the machine base, and when the battery cell is located in the channel, the pre-expanding mechanism is used for pre-expanding a battery bag of the battery cell; the flaring mechanism is arranged on the machine base, and after the pre-flaring mechanism completes pre-flaring on the battery bag of the battery cell, the flaring mechanism flares the battery bag of the battery cell. The battery cell positioning device has the advantages that before the flaring mechanism carries out flaring, the battery cell is automatically positioned, the situation that the battery cell is stressed and deviates is avoided, and the flaring precision of the flaring mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a cell liquid injection and expansion mechanism for a lithium battery production line. Background Art

[0002] In the production process of lithium batteries, the battery cells need to be injected with liquid, vacuumed, and packaged. Among them, the battery bag of the battery cell needs to be expanded before the battery cell is injected with liquid to facilitate the subsequent injection of liquid into the battery cell. However, the expanding mechanism of most injection machines on the market lacks the function of positioning the battery cell, so that the battery cell is prone to force displacement when the expanding mechanism expands the battery bag, and it is difficult to ensure the accuracy of the battery bag expansion, thereby affecting the production quality of the battery cell, which needs to be solved urgently. Utility Model Content

[0003] In response to the above-mentioned deficiencies in the prior art, the present application provides a lithium battery production line cell filling and expanding mechanism, which aims to automatically position the cell before the expanding mechanism performs expanding, thereby avoiding force deviation of the cell, thereby improving the expanding accuracy of the expanding mechanism.

[0004] The above invention objectives of the present application are achieved through the following technical solutions:

[0005] A machine base, wherein the machine base is provided with a workbench, and two opposite mounting plates are provided on the top of the workbench, and a channel for placing the power core is formed between the two mounting plates, and each mounting plate is rotatably provided with a clamping block corresponding to the placement position of the power core, and an elastic member is provided in the clamping block, and the elastic member is used to provide a restoring force for the clamping block to rotate close to the channel;

[0006] A pre-expansion mechanism, the pre-expansion mechanism is arranged on the base, and when the battery cell is located in the channel, the pre-expansion mechanism is used to pre-expand the battery bag of the battery cell;

[0007] The expanding mechanism is arranged on the base, and expands the battery bag of the battery cell after the pre-expansion mechanism completes the pre-expansion of the battery bag of the battery cell.

[0008] By adopting the above technical solution, when the battery cell is located in the channel formed by the two mounting plates, the elastic member can provide the clamping block with a restoring force to rotate close to the channel, so that the clamping block can continuously abut against the battery cell, and since the two mounting plates are relatively arranged, the two clamping blocks can respectively and continuously clamp on the opposite sides of the battery cell to complete the positioning of the battery cell. When the subsequent pre-expansion mechanism and the expansion mechanism respectively perform pre-expansion and expansion processes on the battery bag of the battery cell, the battery cell is not easily displaced by force, thereby improving the accuracy of the expansion of the battery cell, and the battery cell positioning can be completed by only pulling the clamping block and placing the battery cell in the channel, and the structure is simple and easy to operate.

[0009] In a preferred example, the present application can be further configured as follows: the elastic member is a torsion spring, a plurality of rotating shafts are fixedly connected in the mounting plate corresponding to the number of the clamping blocks, the clamping block passes through and is rotatably connected to the rotating shaft, the torsion spring is sleeved on the rotating shaft, one end of the torsion spring is fixedly connected to the rotating shaft and the other end is fixedly connected to the clamping block.

[0010] By adopting the above technical solution, the torsion spring is sleeved on the rotating shaft and fixedly connected to the clamping block and the rotating shaft, so as to provide the clamping block with a restoring force for rotation.

[0011] In a preferred example, the present application can be further configured as follows: a lifting plate is vertically slidably arranged between the two mounting plates, the lifting plate is used to support the battery cells, and the workbench is provided with a first driving device for driving the lifting plate to rise and fall.

[0012] By adopting the above technical solution, a lifting plate is set up to provide a support position for the battery cell, and according to the actual size of the battery cell, the lifting plate can be vertically slid between the two mounting plates under the action of the first driving device to adjust the height of the battery cell, thereby adjusting the abutment position of the clamping block to adapt to positioning and expanding of battery cells of various sizes.

[0013] In a preferred example, the present application can be further configured as follows: the first driving device includes an adjusting seat, the adjusting seat is vertically provided with a strip sliding hole, a screw rod is vertically rotatably connected in the strip sliding hole, one end of the screw rod movably passes through the top of the adjusting seat, an adjusting block is extended at one end of the lifting plate, and the adjusting block thread passes through the screw rod and is located in the strip sliding hole.

[0014] By adopting the above technical solution, when the height of the lifting plate needs to be adjusted, according to the principle of screw transmission, by rotating one end of the screw located at the top of the adjustment seat, the adjustment hole moves vertically in the strip sliding hole to drive the lifting plate to slide vertically between the two mounting plates to achieve the adjustment of the height of the lifting plate.

[0015] In a preferred example, the present application can be further configured as follows: the workbench is slidably provided with a clamping mechanism, the clamping mechanism is used to provide a thrust to the clamping block to rotate away from the channel, the clamping mechanism includes a push rod, the push rod is slidably provided on the workbench, the push rod is used to abut the clamping block, and the workbench is provided with a second driving device for driving the push rod to slide.

[0016] By adopting the above technical solution, after the battery cell is expanded, the push rod is driven to slide by the second driving device until it abuts against one end of the clamping block, so as to provide the clamping block with a thrust to rotate away from the channel, thereby releasing the clamping relationship between the battery cell and the clamping block, making it easier to unload the battery cell.

[0017] In a preferred example, the present application can be further configured as follows: the second driving device includes a roller and a transmission slide, the roller is rotatably connected to the end of the push rod away from the clamping block, the transmission slide is slidably arranged on the workbench and is used to abut the roller, a side of the transmission slide close to the roller is provided with a plurality of inclined surfaces arranged corresponding to the number of the clamping blocks, there is an unclamping position on the sliding path of the transmission slide, when the transmission slide is in the unclamping position, the inclined surface abuts against the roller and provides a thrust for the roller to move closer to the clamping block, a cylinder is fixedly installed on the workbench, and the piston rod of the cylinder is fixedly connected to the transmission slide.

[0018] By adopting the above technical solution, after the battery cell is expanded, when the transmission slide is driven by the cylinder to move to the unclamping position, the inclined surface abuts against the roller, so that the roller provides the push rod with a component force to slide close to the clamping block to complete the pushing function of the push rod, and when the transmission slide is reset and disengaged from the clamping position, the clamping block rotates in the opposite direction under the action of the elastic member and abuts against the push rod, which can make the push rod slide in the opposite direction to complete the reset. Compared with directly using multiple driving devices to move each push rod, this method can save costs and the inclined surface matching method is more accurate, and the structure is simple and practical.

[0019] In a preferred example, the present application can be further configured as follows: the pre-expansion mechanism includes a rotating rod, which is rotatably connected to the machine base, and the rotating rod is provided with a first thread segment and a second thread segment, and the first thread segment and the second thread segment are in opposite directions. The rotating rod is penetrated by two relative sliding seats, and the two sliding seats are respectively threadedly engaged with the first thread segment and the second thread segment, and each sliding seat is horizontally provided with a suction cup, which is connected to an external air pump, and the two suction cups are respectively used to abut against opposite sides of the battery cell bag, and the machine base is fixedly installed with a motor for driving the rotating rod to rotate.

[0020] By adopting the above technical solution, when the battery cell is positioned in the channel, according to the principle of screw transmission, the rotating rod rotates under the action of the motor, and since the first thread segment and the second thread segment are in opposite directions, the two sliding seats drive the suction cups to move towards each other until they respectively abut against the opposite sides of the battery cell battery bag. At this time, the suction cups generate adsorption force on the battery bag through the external air pump, and then drive the two sliding seats to move in opposite directions. The battery bag is opened under the pull of the two relative suction cups, thereby realizing the pre-expansion process of the battery bag.

[0021] In a preferred example, the present application can be further configured as follows: the expanding mechanism includes a expanding piece, and the expanding piece is vertically slidably arranged on the base. When the battery cell is located in the channel, the expanding piece is located directly above the battery cell. The size of the expanding piece close to one end of the channel gradually increases from bottom to top. A motor screw is vertically fixedly installed on the base, and the motor screw is used to drive the expanding piece to slide vertically.

[0022] By adopting the above technical solution, after the battery bag completes the pre-expansion process, the expanding piece moves vertically under the action of the motor screw until it enters the battery bag to complete the expanding process, and because the size of the expanding piece close to one end of the channel gradually increases from bottom to top, it is convenient for the expanding piece to enter the interior of the battery bag and can reduce the possibility of damaging the battery bag. At the same time, the transmission accuracy of the motor screw is high, which is suitable for the working conditions of battery cell expansion.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the battery cell is located in the channel formed by the two mounting plates, the elastic member can provide the clamping block with a restoring force to rotate close to the channel, so that the clamping block can continuously abut against the battery cell, and because the two mounting plates are relatively arranged, the two clamping blocks can be respectively and continuously clamped on the opposite sides of the battery cell to complete the positioning of the battery cell. When the subsequent pre-expansion mechanism and the expansion mechanism respectively perform the pre-expansion and expansion processes on the battery bag of the battery cell, the battery cell is not easily displaced by force, thereby improving the accuracy of the expansion of the battery cell, and the battery cell positioning can be completed by only pulling the clamping block and placing the battery cell in the channel, with a simple structure and easy operation.

[0025] 2. By setting up a lifting plate, a support position can be provided for the battery cell, and according to the actual size of the battery cell, the lifting plate can be vertically slid between the two mounting plates under the action of the first driving device to adjust the height of the battery cell, thereby adjusting the abutment position of the clamping block to adapt to positioning and expanding of battery cells of various sizes.

[0026] 3. After the expansion of the battery cell is completed, when the transmission slide is driven by the cylinder to move to the unclamping position, the inclined surface abuts against the roller, so that the roller provides the push rod with a component force to slide close to the clamping block to complete the pushing function of the push rod, and when the transmission slide is reset and disengaged from the clamping position, the clamping block rotates in the opposite direction under the action of the elastic member and abuts against the push rod, which can make the push rod slide in the opposite direction to complete the reset. Compared with directly using multiple driving devices to move each push rod, this method can save costs and the inclined surface matching method is more accurate, simple in structure and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a cell liquid injection and expansion mechanism for a lithium battery production line in one embodiment of the present application;

[0028] Figure 2 It is a structural schematic diagram of a mounting plate, a clamping block and an opening mechanism in one embodiment of the present application;

[0029] Figure 3 It is a partial structural diagram of a cell liquid injection and expansion mechanism for a lithium battery production line in one embodiment of the present application.

[0030] : Illustration symbols: A1, machine base; A2, workbench; A3, mounting plate; A4, battery cell; A5, channel; A6, clamping block; A7, pre-expansion mechanism; A71, rotating rod; A72, first thread segment; A73, second thread segment; A74, sliding seat; A75, suction cup; A76, motor; A8, expansion mechanism; A81, expansion piece; A82, motor lead screw; A9, lifting plate; A10, first driving device; A101, adjusting seat; A102, strip sliding hole; A103, screw; A104, adjusting block; A11, clamping mechanism; A111, push rod; A112, second driving device; A1121, roller; A1122, transmission slide; A1123, inclined surface. DETAILED DESCRIPTION

[0031] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0032] It should be noted that the terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure.

[0033] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0034] The following describes a cell liquid filling and expanding mechanism for a lithium battery production line of the present application with reference to the accompanying drawings.

[0035] like Figure 1 and Figure 2 As shown, the battery cell filling and expanding mechanism of the lithium battery production line includes a machine base A1 and a workbench A2, two opposite mounting plates A3 are fixedly installed on the top of the workbench A2, a channel A5 for placing the battery cell A4 is formed between the two mounting plates A3, and each mounting plate A3 is rotatably provided with a clamping block A6 corresponding to the placement position of the battery cell A4, and an elastic member is arranged in the clamping block A6, and the elastic member is used to provide a restoring force for the clamping block A6 to rotate close to the channel A5, and the machine base A1 is provided with a pre-expansion mechanism A7 and an expanding mechanism A8, when the battery cell A4 is located in the channel A5, the pre-expansion mechanism A7 is used to pre-expand the battery bag of the battery cell A4, and after the pre-expansion mechanism A7 completes the pre-expansion of the battery bag of the battery cell A4, the expanding mechanism A8 performs a restoring force on the battery cell A4. The battery bag is expanded, and when the battery cell A4 is located in the channel A5 formed by the two mounting plates A3, the elastic member can provide the clamping block A6 with a restoring force to rotate close to the channel A5, so that the clamping block A6 can continuously abut against the battery cell A4, and because the two mounting plates A3 are relatively arranged, the two clamping blocks A6 can be respectively and continuously clamped on the opposite sides of the battery cell A4 to complete the positioning of the battery cell A4, and when the subsequent pre-expansion mechanism A7 and the expansion mechanism A8 respectively perform pre-expansion and expansion processes on the battery bag of the battery cell A4, the battery cell A4 is not easily displaced by force, thereby improving the accuracy of the expansion of the battery cell A4, and the positioning of the battery cell A4 can be completed by only pulling the clamping block A6 and placing the battery cell A4 in the channel A5, and the structure is simple and easy to operate.

[0036] Among them, the elastic member is a torsion spring (not shown in the figure), and a number of rotating shafts (not shown in the figure) are fixedly connected in the mounting plate A3 corresponding to the number of clamping blocks A6. The clamping block A6 passes through and is rotatably connected to the rotating shaft. The torsion spring is sleeved on the rotating shaft. One end of the torsion spring is fixedly connected to the rotating shaft and the other end is fixedly connected to the clamping block A6. By setting the rotating shaft, an installation position can be provided for the clamping block A6 and the torsion spring, and by sleeved on the rotating shaft and fixedly connected to the clamping block A6 and the rotating shaft, a rotational restoring force can be provided to the clamping block A6.

[0037] In addition, if Figure 1 and Figure 2 As shown, in order to adjust the installation height of the battery cell A4 so that the pre-expansion mechanism A7 and the expansion mechanism A8 can respectively perform the pre-expansion and expansion processes on the battery cell A4, a lifting plate A9 is vertically slidably arranged between the two mounting plates A3, and the lifting plate A9 is used to support the battery cell A4. The workbench A2 is provided with a first driving device A10 for driving the lifting plate A9 to rise and fall. By providing the lifting plate A9, a supporting position can be provided for the battery cell A4, and the lifting plate A9 can be vertically slid between the two mounting plates A3 under the action of the first driving device A10 according to the actual size of the battery cell A4, so as to adjust the height of the battery cell A4, thereby adjusting the abutting position of the clamping block A6, so as to adapt to the positioning and expansion of battery cells A4 of various sizes.

[0038] Specifically, Figure 2 As shown, the first driving device A10 includes an adjusting seat A101, and a strip sliding hole A102 is vertically opened on the adjusting seat A101. A screw rod A103 is vertically rotatably connected in the strip sliding hole A102. One end of the screw rod A103 movably passes through the top of the adjusting seat A101. An adjusting block A104 is extended at one end of the lifting plate A9. The adjusting block A104 threadably passes through the screw rod A103 and is located in the strip sliding hole A102. When it is necessary to adjust the height of the lifting plate A9, according to the principle of screw transmission, by rotating one end of the screw rod A103 located at the top of the adjusting seat A101, the adjusting hole moves vertically in the strip sliding hole A102, so as to drive the lifting plate A9 to slide vertically between the two mounting plates A3, so as to realize the adjustment of the height of the lifting plate A9.

[0039] In addition, if Figure 2 As shown, the workbench A2 is also slidably provided with a clamping mechanism A11, which is used to provide a thrust to the clamping block A6 to rotate away from the channel A5. The clamping mechanism A11 includes a push rod A111, which is slidably provided on the workbench A2, and the push rod A111 is used to abut against the clamping block A6. The workbench A2 is provided with a second driving device A112 for driving the push rod A111 to slide. After the expansion of the battery cell A4 is completed, the push rod A111 is driven by the second driving device A112 to slide until it abuts against one end of the clamping block A6, so as to provide a thrust to the clamping block A6 to rotate away from the channel A5, thereby releasing the clamping relationship between the battery cell A4 and the clamping block A6, and facilitating the unloading operation of the battery cell A4.

[0040] Specifically, the second driving device A112 includes a roller A1121 and a transmission slide A1122. The roller A1121 is rotatably connected to the end of the push rod A111 away from the clamping block A6. The transmission slide A1122 is slidably arranged on the workbench A2 and is used to abut the roller A1121. A side of the transmission slide A1122 close to the roller A1121 is provided with a plurality of inclined surfaces A1123 arranged corresponding to the number of the clamping blocks A6. There is an unclamping position on the sliding path of the transmission slide A1122. When the transmission slide A1122 is in the unclamping position, the inclined surface A1123 abuts against the roller A1121 and provides a thrust for the roller A1121 to move close to the clamping block A6. The workbench A2 is fixedly installed with a cylinder (not shown in the figure). The activity of the cylinder The plug rod is fixedly connected to the transmission slide A1122. After the expansion of the battery cell A4 is completed, when the transmission slide A1122 is driven by the cylinder to move to the unclamping position, the inclined surface A1123 abuts against the roller A1121, so that the roller A1121 provides the push rod A111 with a component force to slide close to the clamping block A6, so as to complete the pushing function of the push rod A111, and when the transmission slide A1122 is reset and disengaged from the clamping position, the clamping block A6 rotates in the opposite direction under the action of the elastic member and abuts against the push rod A111, so that the push rod A111 can slide in the opposite direction to complete the reset. Compared with directly using multiple driving devices to move each push rod A111, this method can save costs and the inclined surface matching method is more accurate, and the structure is simple and practical.

[0041] like Figure 3 As shown, in this embodiment, the pre-expansion mechanism A7 includes a rotating rod A71, which is rotatably connected to the base A1, and the rotating rod A71 is provided with a first thread segment A72 and a second thread segment A73, the first thread segment A72 and the second thread segment A73 are in opposite directions, and the rotating rod A71 is penetrated by two opposite sliding seats A74, the two sliding seats A74 are respectively threadedly matched with the first thread segment A72 and the second thread segment A73, each sliding seat A74 is horizontally provided with a suction cup A75, the suction cup A75 is connected to an external air pump (not shown in the figure), and the two suction cups A75 are respectively used to abut against the opposite sides of the battery bag of the battery cell A4, and the base. A1 is fixedly installed with a motor A76 for driving the rotating rod A71 to rotate. When the battery cell A4 is located in the channel A5 and is positioned, the rotating rod A71 rotates under the action of the motor A76 according to the principle of screw transmission. Since the first thread segment A72 and the second thread segment A73 are in opposite directions, the two sliding seats A74 drive the suction cups A75 to move towards each other until they respectively abut against the opposite sides of the battery bag of the battery cell A4. At this time, the suction cups A75 generate adsorption force on the battery bag through the external air pump, and then drive the two sliding seats A74 to move in opposite directions. The battery bag is opened under the pull of the two relative suction cups A75, thereby realizing the pre-expansion process of the battery bag.

[0042] like Figure 1As shown, the expanding mechanism A8 includes a expanding piece A81, which is vertically slidably arranged on the base A1. When the battery cell A4 is located in the channel A5, the expanding piece A81 is located directly above the battery cell A4. The size of the expanding piece A81 near one end of the channel A5 gradually increases from bottom to top. The base A1 is vertically fixed with a motor screw A82, which is used to drive the expanding piece A81 to slide vertically. After the battery bag completes the pre-expansion process, the expanding piece A81 moves vertically under the action of the motor screw A82 until it enters the battery bag to complete the expanding process. Moreover, since the size of the expanding piece A81 near one end of the channel A5 gradually increases from bottom to top, it is convenient for the expanding piece A81 to enter the interior of the battery bag and can reduce the possibility of damaging the battery bag. At the same time, the motor screw A82 has high transmission accuracy and is suitable for the working condition of expanding the battery cell A4.

[0043] The implementation principle of the battery cell filling and expanding mechanism of a lithium battery production line in an embodiment of the present application is as follows: when working, the battery cell A4 is first placed in the channel A5 formed by the two mounting plates A3 and is located between the two clamping blocks A6. The clamping block A6 continuously abuts against the battery cell A4 through the restoring force of the torsion spring to complete the positioning of the battery cell A4. When the subsequent pre-expansion mechanism A7 and the expanding mechanism A8 respectively perform pre-expansion and expansion processes on the battery bag of the battery cell A4, the battery cell A4 is not easily displaced by force, thereby improving the accuracy of the expansion of the battery cell A4. Finally, the clamping block A6 is opened by the opening mechanism A11 to facilitate the removal of the battery cell A4 and complete the expansion process.

[0044] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A cell filling and expanding mechanism for a lithium battery production line, characterized in that: include: A machine base (A1), wherein the machine base (A1) is provided with a workbench (A2), wherein two opposing mounting plates (A3) are provided on the top of the workbench (A2), wherein a channel (A5) for placing a power core (A4) is formed between the two mounting plates (A3), wherein each mounting plate (A3) is provided with a clamping block (A6) rotatably disposed at a position corresponding to a placement position of the power core (A4), wherein an elastic member is disposed inside the clamping block (A6), and wherein the elastic member is used to provide a restoring force for the clamping block (A6) to rotate close to the channel (A5); A pre-expansion mechanism (A7), the pre-expansion mechanism (A7) being arranged on the base (A1), and being used for pre-expanding the battery bag of the battery cell (A4) when the battery cell (A4) is located in the channel (A5); An expansion mechanism (A8), wherein the expansion mechanism (A8) is arranged on the base (A1), and after the pre-expansion mechanism (A7) completes pre-expansion of the battery bag of the battery cell (A4), the expansion mechanism (A8) expands the battery bag of the battery cell (A4).

2. A lithium battery production line battery cell injection and expansion mechanism as claimed in claim 1, characterized in that: The elastic member is a torsion spring, and a plurality of rotating shafts are fixedly connected in the mounting plate (A3) in a number corresponding to the number of the clamping blocks (A6); the clamping block (A6) penetrates through and is rotatably connected to the rotating shaft; the torsion spring is sleeved on the rotating shaft; one end of the torsion spring is fixedly connected to the rotating shaft and the other end is fixedly connected to the clamping block (A6).

3. A lithium battery production line battery cell injection and expansion mechanism as claimed in claim 1, characterized in that: A lifting plate (A9) is vertically slidably arranged between the two mounting plates (A3), the lifting plate (A9) being used to support the battery core (A4), and the workbench (A2) is provided with a first driving device (A10) for driving the lifting plate (A9) to rise and fall.

4. A lithium battery production line cell filling and expanding mechanism as claimed in claim 3, characterized in that: The first driving device (A10) comprises an adjusting seat (A101), the adjusting seat (A101) is vertically provided with a strip-shaped sliding hole (A102), a screw rod (A103) is vertically rotatably connected in the strip-shaped sliding hole (A102), one end of the screw rod (A103) movably passes through the top of the adjusting seat (A101), and an adjusting block (A104) is extended from one end of the lifting plate (A9), the adjusting block (A104) is threadedly passed through the screw rod (A103) and is located in the strip-shaped sliding hole (A102).

5. A lithium battery production line battery cell injection and expansion mechanism as claimed in claim 1, characterized in that: The workbench (A2) is slidably provided with a clamping mechanism (A11), and the clamping mechanism (A11) is used to provide a thrust to the clamping block (A6) to rotate away from the channel (A5). The clamping mechanism (A11) includes a push rod (A111), and the push rod (A111) is slidably provided on the workbench (A2), and the push rod (A111) is used to abut against the clamping block (A6). The workbench (A2) is provided with a second driving device (A112) for driving the push rod (A111) to slide.

6. A lithium battery production line battery cell injection and expansion mechanism as claimed in claim 5, characterized in that: The second driving device (A112) comprises a roller (A1121) and a transmission slide (A1122), wherein the roller (A1121) is rotatably connected to an end of the push rod (A111) away from the clamping block (A6), and the transmission slide (A1122) is slidably disposed on the workbench (A2) and is used to abut against the roller (A1121), and a side surface of the transmission slide (A1122) close to the roller (A1121) corresponds to the number of the clamping blocks (A6). A plurality of inclined surfaces (A1123) are arranged in an array, and an opening position exists on the sliding path of the transmission slide (A1122). When the transmission slide (A1122) is located at the opening position, the inclined surface (A1123) abuts against the roller (A1121) and provides a thrust for the roller (A1121) to move closer to the clamping block (A6). A cylinder is fixedly installed on the workbench (A2), and a piston rod of the cylinder is fixedly connected to the transmission slide (A1122).

7. A lithium battery production line battery cell injection and expansion mechanism as claimed in claim 1, characterized in that: The pre-expansion mechanism (A7) comprises a rotating rod (A71), the rotating rod (A71) is rotatably connected to the machine base (A1), the rotating rod (A71) is provided with a first thread segment (A72) and a second thread segment (A73), the first thread segment (A72) and the second thread segment (A73) are in opposite directions, the rotating rod (A71) is penetrated by two opposite sliding seats (A74), the two sliding seats (A74) are respectively threadedly matched with the first thread segment (A72) and the second thread segment (A73), each sliding seat (A74) is horizontally provided with a suction cup (A75), the suction cup (A75) is connected to an external air pump, and the two suction cups (A75) are respectively used to abut against opposite sides of a battery bag of a battery cell (A4), and the machine base (A1) is fixedly installed with a motor (A76) for driving the rotating rod (A71) to rotate.

8. A cell filling and expanding mechanism for a lithium battery production line as claimed in claim 1, characterized in that: The expansion mechanism (A8) comprises an expansion piece (A81), and the expansion piece (A81) is vertically slidably arranged on the base (A1). When the battery cell (A4) is located in the channel (A5), the expansion piece (A81) is located directly above the battery cell (A4). The size of the expansion piece (A81) close to one end of the channel (A5) gradually increases from bottom to top. A motor screw (A82) is vertically fixedly installed on the base (A1), and the motor screw (A82) is used to drive the expansion piece (A81) to slide vertically.

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