Tab threading apparatus, assembling device and assembling method for battery

Abstract

Disclosed in the present application are a tab threading apparatus, assembling device and assembling method for batteries. The battery comprises a casing and an electrode assembly, the casing being provided with an accommodation cavity, and a through hole being formed in the casing. The electrode assembly is arranged in the accommodation cavity, and the tab threading apparatus is used for guiding a tab portion of the electrode assembly to extend out of the through hole. The tab threading apparatus comprises a clamping mechanism and a driving mechanism, and the driving mechanism is configured to drive the clamping mechanism to clamp the tab portion located in the accommodation cavity to extend out of the accommodation cavity through the through hole. In this way, the present application can effectively reduce the assembly difficulty of batteries.

Description

Battery tab piercing device, assembly equipment and assembly method

[0001] This application claims priority to the Chinese patent application with application number "2023116433416" filed on November 30, 2023, and invention name "Battery Tab Piercing Device, Assembly Equipment and Assembly Method", which is incorporated herein by reference in its entirety.

Technical field

[0002] The present application relates to the field of battery technology, and in particular to a battery tab piercing device, assembly equipment, and assembly method. [Background Technology]

[0003] A battery is a device that converts chemical energy into electrical energy. It contains a cup, tank, or other container, or a portion of a composite container, that contains an electrolyte solution and metal electrodes to generate an electric current. With the advancement of technology, batteries, with their advantages of portability, ease of charge and discharge, and long-term stable power supply, have become widely used in automobiles, home appliances, aerospace, and other fields.

[0004] The battery's tabs are the metal conductors that lead the positive and negative electrodes from the cell out of the casing. Therefore, during battery assembly, these tabs need to be extended outside the casing to serve as contact points during charging and discharging. However, during assembly, when the battery cell is assembled into the casing, the tabs tend to bend inside the casing and become unable to extend outside. This complicates the battery assembly process and results in a low battery yield.

[0005] [Summary of the invention]

[0006] In view of the above problems, the present application provides a battery ear insertion device, assembly equipment and assembly method, so that the ear part can be smoothly extended out of the shell, which can effectively reduce the assembly difficulty of the battery and effectively improve the assembly efficiency of the battery.

[0007] In a first aspect, the present application provides a tab-piercing device for a battery, wherein the battery includes a housing and an electrode assembly, wherein the housing has a housing cavity, and a through-hole is provided on the housing that connects the housing cavity with the outside world. The electrode assembly is disposed in the housing cavity, and the tab-piercing device is used to guide the tab portion of the electrode assembly to extend from the through-hole. The tab-piercing device includes a clamping mechanism and a driving mechanism, wherein the clamping mechanism is used to clamp the tab portion, and the driving mechanism is in transmission connection with the clamping mechanism and is used to drive the clamping mechanism to move. The driving mechanism is configured to drive the clamping mechanism to clamp the tab portion located in the housing cavity and extend the tab portion through the through-hole to the housing cavity.

[0008] Through the above method, by setting a clamping mechanism that can clamp the pole ear part and setting a driving mechanism for transmission connection of the clamping mechanism, it can be achieved that during the assembly process of the battery, when the shell is inserted into the electrode assembly, the driving mechanism drives the clamping mechanism to clamp the pole ear part, and under the premise of not affecting and damaging the shell, the pole ear part can be guided to smoothly penetrate into the through hole, so that the pole ear part can smoothly extend out of the shell, so that the pole ear part is not easy to block the shell from being inserted into the electrode assembly, and the pole ear part is not easy to collide with the shell and cause damage or fail to penetrate the through hole smoothly, thereby realizing the precise entry of the electrode assembly into the shell, effectively improving the working stability and reliability of the pole ear insertion device, effectively reducing the assembly difficulty of the battery, and effectively improving the assembly efficiency and yield rate of the battery.

[0009] In some embodiments, the clamping mechanism includes a plurality of clamping plates, and a driving mechanism is in transmission connection with at least one of the plurality of clamping plates for driving the at least one clamping plate to move. Furthermore, the driving mechanism is configured to drive the plurality of clamping plates to clamp the circumference of the pole lug portion so that the pole lug portion can extend out of the accommodating cavity, and is configured to enable the plurality of clamping plates to loosen the circumference of the pole lug portion to release the pole lug portion.

[0010] In the above manner, by setting up multiple clamping plates to clamp the pole ear, the efficiency of clamping and releasing the pole ear can be improved, and the circumferential clamping of the pole ear by multiple clamping plates can improve the clamping stability and effectively improve the reliability of the clamping mechanism.

[0011] In some embodiments, the plurality of clamping plates include a first clamping plate and a second clamping plate, and the driving mechanism is configured to drive the first clamping plate and the second clamping plate to abut against both sides of the clamping tab portion in a thickness direction.

[0012] In the above manner, by providing the first clamping plate and the second clamping plate capable of clamping both sides of the pole ear in the thickness direction, the pole ear can be clamped without causing damage to the pole ear, which is beneficial to improving the reliability of the clamping mechanism.

[0013] In some embodiments, the driving mechanism is used to drive at least one clamping plate to rotate, so that the plurality of clamping plates can clamp or release the pole lug portion together.

[0014] In the above manner, a driving mechanism is provided to drive at least one clamping plate to rotate, so that multiple clamping plates can jointly clamp or release the pole ear portion, effectively reducing the difficulty of the clamping mechanism switching between clamping and releasing the pole ear portion, which is beneficial to improving the working efficiency of the pole ear piercing device.

[0015] In some embodiments, the drive mechanism is configured to drive the rotation of the first clamping plate and the second clamping plate, wherein the first clamping plate is capable of rotating about a first rotation axis and the second clamping plate is capable of rotating about a second rotation axis, with the first rotation axis and the second rotation axis being disposed side by side. Alternatively, the drive mechanism is in driving connection with the first clamping plate, configured to drive the first clamping plate to rotate about a predetermined rotation axis, with the second clamping plate being spaced apart from and relatively fixed to the predetermined rotation axis.

[0016] Through the above method, by providing a first clamping plate and a second clamping plate that can rotate around the first rotation axis and the second rotation axis respectively, or providing a first clamping plate that can rotate around a preset rotation axis and a relatively fixed second clamping plate, the first clamping plate and the second clamping plate are staggered with each other before the clamping mechanism clamps the pole ear portion, so that the pole ear portion can enter the clampable range between the two, and it is convenient for the first clamping plate and / or the second clamping plate to rotate to both sides of the thickness direction of the pole ear portion to abut the pole ear portion, thereby clamping the pole ear portion from both sides of the pole ear portion, which has a simple structure, is easy to operate, is not easy to damage the pole ear portion, is conducive to improving the clamping efficiency of the clamping mechanism, and effectively improves the working reliability of the clamping assembly.

[0017] In some embodiments, the driving mechanism is used to drive the first clamping plate and / or the second clamping plate to rotate so that the relative position of the first clamping plate and the second clamping plate can be switched between a clamping position and a release position; in the clamping position, the first clamping plate and the second clamping plate at least partially overlap in the thickness direction of the pole ear portion and abut against each other to clamp both sides of the thickness direction of the pole ear portion; in the release position, the abutment between the first clamping plate and the second clamping plate is cancelled to release the pole ear portion.

[0018] By using the above method, when in the clamping position, the first clamping plate and the second clamping plate are at least partially overlapped to abut against both sides of the thickness direction of the pole ear part, while improving the stability of the clamping, it is not easy to cause damage to the pole ear part, thereby effectively improving the working reliability of the clamping assembly.

[0019] In some embodiments, the first clamping plate is provided with a first avoidance gap, and the second clamping plate is provided with a second avoidance gap; when in the release position, the first avoidance gap and the second avoidance gap are arranged opposite to each other, and there is a spacing space between the first avoidance gap and the second avoidance gap, and the first avoidance gap, the second avoidance gap and the spacing space are connected to each other to form an avoidance space.

[0020] Through the above method, the first avoidance gap, the second avoidance gap and the spacing space are set to connect and form an avoidance space, which is conducive to the pole ear part to smoothly enter the avoidance space when the first clamping plate and the second clamping plate are in the release position, without interfering with the first clamping plate and the second clamping plate to cause damage. In addition, the setting of the first avoidance gap and the second avoidance gap can reduce the size of the space required to be occupied by the clamping mechanism while ensuring the size of the avoidance space, which is conducive to improving the utilization rate of the space and effectively improving the working reliability of the clamping mechanism.

[0021] In some embodiments, the first clamping plate includes a first plate body and a first rotating part, the first rotating part protrudes from a side edge of the first plate body to form a first avoidance gap between the first rotating part and the first plate body, and the driving mechanism is transmission-connected to the first rotating part to drive the first rotating part to rotate around the first rotation axis; and / or, the second clamping plate includes a second plate body and a second rotating part, the second rotating part protrudes from a side edge of the second plate body to form a second avoidance gap between the second rotating part and the second plate body, and the driving mechanism is transmission-connected to the second rotating part to drive the second rotating part to rotate around the second rotation axis.

[0022] Through the above method, the first plate body and the first rotating part are set to form a first avoidance gap, and the second plate body and the second rotating part are set to form a second avoidance gap, so that the pole ear part can be accommodated in the avoidance space when the first clamping plate and the second clamping plate are in the release position, and when switching to the clamping position, the driving mechanism only needs to drive the first rotating part and the second rotating part to rotate to drive the first plate body and the second plate body to rotate, so as to achieve clamping of the pole ear part. It is easy to operate and has a simple structure, which effectively improves the clamping efficiency and working reliability of the clamping mechanism.

[0023] In some embodiments, the first clamping plate and the second clamping plate rotate in the same direction; and / or the first rotation axis and the second rotation axis are parallel to each other; and / or the first rotation axis and the second rotation axis are arranged to be parallel to the axis of the through hole.

[0024] Through the above method, the difficulty of installing and positioning the first clamping plate and the second clamping plate is effectively reduced, and it is conducive to smoothly clamping and guiding the pole ear portion to penetrate the through hole, effectively improving the clamping efficiency of the clamping mechanism and effectively improving the working reliability of the pole ear piercing device.

[0025] In some embodiments, the ratio of the width of the first clamping plate in the direction perpendicular to the first rotation axis to the width of the second clamping plate in the direction perpendicular to the second rotation axis is 0.5 to 2; and / or, the length of the first clamping plate along the first rotation axis is the same as the length of the second clamping plate along the second rotation axis.

[0026] Through the above-described method, by properly setting the ratio of the width of the first clamping plate in the direction perpendicular to the first rotation axis to the width of the second clamping plate in the direction perpendicular to the second rotation axis, the clamping stability of the pole lug is effectively improved while effectively ensuring the smooth operation of the clamping mechanism, and the possibility of the pole lug being unable to be stably and reliably clamped due to an excessively small or excessive ratio of the two widths is effectively reduced. Properly setting the lengths of the first clamping plate and the second clamping plate can effectively ensure the area of ​​the overlapping portion between the two in the clamping position, effectively improving space utilization while providing effective and reliable clamping of the pole lug.

[0027] In some embodiments, the first clamping plate and the second clamping plate are rotatably connected, and the first clamping plate and the second clamping plate can rotate relative to each other around the same preset rotation axis. The driving mechanism is transmission-connected to the first clamping plate and / or the second clamping plate to drive the first clamping plate and / or the second clamping plate to rotate around the preset rotation axis.

[0028] Through the above method, by setting the first clamping plate and the second clamping plate that rotate around the same preset rotation axis, the release position and the clamping position can be smoothly switched, which is conducive to smoothly clamping and guiding the pole ear part to penetrate the through hole, effectively improving the clamping efficiency of the clamping mechanism and effectively improving the working reliability of the pole ear piercing device.

[0029] In some embodiments, the tab piercing device includes a transmission mechanism, the driving mechanism is in transmission connection with the transmission mechanism, and the transmission mechanism is in transmission connection with the first clamping plate and the second clamping plate.

[0030] In the above manner, by setting up a transmission mechanism, a transmission connection is achieved between the drive mechanism and the first clamping plate and the second clamping plate, providing a basis for switching between the release position and the clamping position, and effectively improving the working reliability of the piercing lug device.

[0031] In some embodiments, the transmission mechanism includes a first transmission rod rotating around a first rotation axis and a second transmission rod rotating around a second rotation axis, the first transmission rod is connected to a first clamping plate, and the second transmission rod is connected to a second clamping plate; the driving mechanism is connected to the first transmission rod and the second transmission rod for driving the first transmission rod to rotate around the first rotation axis and driving the second transmission rod to rotate around the second rotation axis.

[0032] Through the above method, by setting the first transmission rod and the second transmission rod, the driving mechanism can respectively drive the first transmission rod and the second transmission rod to rotate to respectively drive the first clamping plate and the second clamping plate to rotate, so as to realize the first clamping plate and the second clamping plate to rotate around the first rotation axis and the second rotation axis respectively, thereby realizing the switching of the release position and the clamping position, effectively improving the working reliability of the piercing ear device.

[0033] In some embodiments, the transmission mechanism includes a connecting rod mechanism, which is in transmission connection with the first transmission rod and the second transmission rod, and the driving mechanism is in transmission connection with the connecting rod mechanism, and the driving mechanism is used to drive the first transmission rod and the second transmission rod to rotate through the connecting rod mechanism.

[0034] Through the above method, by setting a connecting rod mechanism to drive the first transmission rod and the second transmission rod to rotate, it is beneficial to smoothly switch the release position and the clamping position, thereby facilitating the clamping of the pole ear part, effectively improving the working reliability of the pole ear piercing device, and the connecting rod mechanism has a stable structure, which is convenient for loading and unloading, installation and maintenance.

[0035] In some embodiments, the linkage mechanism includes a base, a first link, a second link and a third link. The first link, the second link and the third link are arranged on one side of the base, and the third link is respectively connected to the first link and the second link in a transmission connection. The driving mechanism is used to drive the third link to rotate; the first transmission rod and the second transmission rod are passed through the base from the other side of the base and are respectively connected to the first link and the second link in a transmission connection.

[0036] Through the above method, by setting a connecting rod mechanism to drive the first transmission rod and the second transmission rod to rotate, it is beneficial to smoothly switch the release position and clamping position of the clamping mechanism, thereby facilitating the clamping of the pole ear part, effectively improving the working reliability of the pole ear device, and the connecting rod mechanism has strong load-bearing capacity and good impact resistance, which is beneficial to improving the service life of the pole ear device.

[0037] In some embodiments, the transmission mechanism includes an input shaft and a coupling, the driving mechanism has an output shaft, the input shaft and the output shaft are connected through the coupling, and the input shaft is in transmission connection with the connecting rod mechanism.

[0038] Through the above method, by setting the input shaft and the coupling, the power output by the output shaft of the driving mechanism is input into the connecting rod mechanism through the coupling and the input shaft. It is easy to operate and has a simple structure, which effectively improves the working stability and reliability of the transmission mechanism.

[0039] In some embodiments, the transmission mechanism includes a gear mechanism, which is in transmission connection with the first transmission rod and the second transmission rod, and the drive mechanism is in transmission connection with the gear mechanism, and the drive mechanism is used to drive the first transmission rod and the second transmission rod to rotate through the gear mechanism.

[0040] Through the above method, by setting a gear mechanism to drive the first transmission rod and the second transmission rod to rotate, it is conducive to smoothly switching the release position and clamping position of the clamping mechanism, thereby facilitating the clamping of the pole ear part, effectively improving the working reliability of the pole ear piercing device, and the gear mechanism has a stable structure, low manufacturing cost, and is easy to position, install and disassemble, effectively reducing the difficulty of installation and maintenance.

[0041] In some embodiments, the gear mechanism includes a base, a main gear, a first slave gear and a second slave gear. The main gear, the first slave gear and the second slave gear are arranged on one side of the base, and the first slave gear and the second slave gear are engaged with each other. The driving mechanism is used to drive the first driving wheel to rotate; the first transmission rod and the second transmission rod are passed through the base from the other side of the base, and are respectively connected to the first slave gear and the second slave gear.

[0042] Through the above method, by driving the first main gear to rotate through the driving mechanism, the rotation of the first slave gear and the second slave gear can be realized, and then the switching of the release position and the clamping position of the clamping mechanism can be realized. It is easy to operate, simple in structure, easy to load and unload, and has high structural stability, which is beneficial to improving the service life of the gear mechanism and the working reliability of the piercing ear device.

[0043] In some embodiments, the transmission mechanism includes an input shaft and a coupling, the driving mechanism has an output shaft, the input shaft and the output shaft are connected through the coupling, and the input shaft is in transmission connection with the gear mechanism.

[0044] In the above manner, by setting the input shaft and the coupling, the power output by the output shaft of the driving mechanism is input into the gear mechanism through the coupling and the input shaft. The operation is convenient, the structure is simple, and the working stability and reliability of the transmission mechanism are effectively improved.

[0045] In some embodiments, the tab device includes a flange seat, and the driving mechanism and the transmission mechanism are connected via the flange seat.

[0046] In the above manner, the connection between the driving mechanism and the transmission mechanism is achieved by setting a flange seat, which effectively improves the connection stability between the driving mechanism and the transmission mechanism, and is beneficial to improving the working stability and reliability of the transmission mechanism.

[0047] In some embodiments, the process of inserting the housing into the electrode assembly includes a first stage. In the first stage, the clamping mechanism is configured to be able to move relative to the electrode assembly together with the housing to clamp the electrode lug portion in the first stage.

[0048] Through the above method, by moving the clamping mechanism and the shell relative to the electrode assembly in the first stage, the clamping mechanism can approach the pole ear while the electrode assembly is gradually inserted into the shell, so as to clamp the pole ear in the first stage, and the pole ear can be clamped smoothly and fluently, thereby effectively improving the clamping efficiency of the clamping mechanism and the assembly efficiency of the battery.

[0049] In some embodiments, the process of inserting the shell into the electrode assembly includes a second stage located after the first stage. In the second stage, the clamping mechanism is configured to be able to move relative to the shell in a direction away from each other and maintain the clamping of the pole ear portion, thereby extending the clamping pole ear portion through the through hole and out of the accommodating cavity.

[0050] Through the above method, by moving the clamping mechanism and the shell away from each other in the second stage and maintaining the clamping of the pole ear, the pole ear can be guided to pass through the through hole while the electrode assembly is further inserted into the shell. The assembly process is smooth and clear, effectively improving the efficiency of the pole ear passing through the through hole and the assembly efficiency of the battery.

[0051] In a second aspect, the present application provides a battery assembly device, which includes a shell insertion device and the above-mentioned ear-piercing device, and the shell insertion device is used to install the electrode assembly from the open end of the shell into the shell. The shell insertion device includes a shell fixing mechanism and a supporting assembly, the shell fixing mechanism is used to fix the shell, and the supporting assembly is used to support the electrode assembly. Among them, the shell fixing mechanism and the ear-piercing device are configured to be able to rise and fall relative to the supporting assembly to correspond to being away from or close to the supporting assembly; the ear-piercing device is used to penetrate into the accommodating cavity through the through hole before clamping the ear part; the shell fixing mechanism is used to insert the shell into the electrode assembly; the driving mechanism is used to drive the clamping mechanism to clamp the ear part in the accommodating cavity, and drive the clamping mechanism to guide the ear part to extend out of the accommodating cavity through the through hole.

[0052] Through the above method, when the battery shell is inserted into the electrode assembly, the pole ear part of the battery can be smoothly guided through the through hole to extend out of the accommodating cavity, so that the pole ear part can smoothly extend out of the shell, so that the pole ear part is not easy to block the shell from being inserted into the electrode assembly, and the pole ear part is not easy to collide with the shell to cause damage or fail to smoothly penetrate the through hole, thereby realizing the precise entry of the electrode assembly into the shell, effectively improving the working stability and reliability of the pole ear piercing device, effectively reducing the difficulty of battery assembly, and effectively improving the assembly efficiency and yield of the battery.

[0053] In a third aspect, the present application provides a method for assembling a battery, wherein the battery comprises a housing and an electrode assembly, the housing having a housing cavity and a through-hole connecting the housing cavity to the outside world, the electrode assembly being disposed in the housing cavity, and a tab portion of the electrode assembly extending from the through-hole. The assembly method comprises: controlling a clamping mechanism to pass through the through-hole and extend into the housing cavity, and controlling the housing to insert the electrode assembly; during the process of inserting the housing into the electrode assembly, controlling a driving mechanism to drive the clamping mechanism to clamp the tab portion within the housing cavity, and driving the clamping mechanism to guide the tab portion through the through-hole and extend out of the housing cavity.

[0054] Through the above method, the pole ear of the battery can be smoothly guided to pass through the through hole, so that the pole ear is not easy to block the shell from being inserted into the electrode assembly, and the pole ear is not easy to collide with the shell and cause damage or be unable to pass through the through hole smoothly, thereby realizing the precise entry of the electrode assembly into the shell, and guiding the pole ear to pass through the through hole while the shell is inserted into the electrode assembly, effectively improving the working stability and reliability of the pole ear insertion device, effectively reducing the difficulty of battery assembly, and effectively improving the assembly efficiency and yield rate of the battery.

[0055] In some embodiments, the driving mechanism is controlled to drive the clamping mechanism to clamp the pole ear portion, and drives the clamping mechanism to guide the pole ear portion to extend through the through hole and out of the accommodating cavity, including: in the first stage, the clamping mechanism and the shell are controlled to move relative to the electrode assembly to clamp the pole ear portion in the first stage; in the second stage, the clamping mechanism and the shell are controlled to move relative to each other and keep clamping the pole ear portion, thereby clamping the pole ear portion to extend through the through hole and out of the accommodating cavity.

[0056] Through the above method, in the first stage, the clamping mechanism and the shell move relative to the electrode assembly, so that the clamping mechanism can clamp the pole ear while the electrode assembly gradually enters the shell, and the pole ear can be clamped smoothly and fluently. In the second stage, the clamping mechanism and the shell move relative to each other in a direction away from each other and maintain clamping of the pole ear, so that the pole ear can be guided to pass through the through hole while the electrode assembly is further inserted into the shell. The assembly process is smooth and clear, effectively improving the efficiency of the pole ear passing through the through hole and the assembly efficiency of the battery.

Brief Description of the Drawings

[0057] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0058] FIG1 is a schematic structural diagram of a vehicle according to one or more embodiments;

[0059] FIG2 is a schematic diagram of an exploded structure of a battery according to one or more embodiments;

[0060] FIG3 is a schematic diagram of an exploded structure of a power supply battery according to one or more embodiments;

[0061] FIG4 is a schematic structural diagram of an assembly device according to one or more embodiments;

[0062] FIG5 is a schematic structural diagram of a battery assembly system according to one or more embodiments;

[0063] FIG6 is a schematic structural diagram of a tab piercing device according to one or more embodiments;

[0064] FIG7 is a front view of the tab piercing device shown in FIG6 in a clamping position;

[0065] FIG8 is a front view of the tab piercing device shown in FIG6 in a released position;

[0066] FIG9 is another front view of the tab piercing device shown in FIG6 in the release position;

[0067] FIG10 is a schematic diagram of an implementation scenario of the connecting rod mechanism shown in FIG7 ;

[0068] FIG11 is a schematic diagram of another implementation scenario of the connecting rod mechanism shown in FIG7 ;

[0069] FIG12 is a schematic diagram of the exploded structure of a tab piercing device according to one or more embodiments;

[0070] FIG13 is a schematic diagram of an implementation scenario of the transmission mechanism shown in FIG6 ;

[0071] FIG14 is a schematic flow chart of an embodiment of a battery assembly method of the present application.

[0072] The reference numerals in the specific embodiments are as follows: 1000a vehicle; 100a power supply battery; 200a controller; 300a motor; 10a housing; 11a first portion; 12a second portion; F1 preset assembly direction; F2 direction perpendicular to the first rotation axis; F3 direction perpendicular to the second rotation axis; F4 thickness direction of the tab portion; L1 first rotation axis; L2 second rotation axis; L3 preset rotation axis; 1 Battery; 10 Housing; 11 Receiving Chamber; 12 Open End; 13 Top; 14 Through-hole; 15 Post; 20 Electrode Assembly; 21 Ear; 30 Bottom Cover; 2 Ear Insertion Device; 201 Avoidance Space; 202 First Avoidance Notch; 203 Second Avoidance Notch; 204 Spacing Space; 100 Clamping Mechanism; 110 First Clamping Plate; 111 First Plate; 112 First Rotating Part; 120 Second Clamping Plate; 121 Second Plate; 122 Second Rotating Part; 130 Clamping Plate; 200 Driving Mechanism; 210 Output Shaft; 300 Transmission Mechanism ; 310 first transmission rod; 320 second transmission rod; 330 connecting rod mechanism; 331 first connecting rod; 332 second connecting rod; 333 third connecting rod; 340 input shaft; 350 coupling; 360 gear mechanism; 361 first slave gear; 362 second slave gear; 363 main gear; 370 base; 400 flange seat; 3 assembly equipment; 40 shell insertion device; 41 shell fixing mechanism; 42 load-bearing component; 50 tab welding device; 60 pole welding device; 70 bottom cover welding device; 80 pairing device; 4 conveying equipment; 5 battery assembly system. [Specific implementation method]

[0073] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0075] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0076] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0077] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0078] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0079] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0080] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0081] With the advancement of battery technology, batteries are being used in a growing number of fields and are gradually replacing traditional fossil fuels in the automotive powertrain sector. Batteries store chemical energy and controllably convert it into electrical energy. In recyclable batteries, after discharge, the active materials can be activated by recharging for continued use.

[0082] A battery is a device that converts chemical energy into electrical energy. It contains a cup, tank, or other container, or a portion of a composite container, that contains an electrolyte solution and metal electrodes to generate an electric current. With the advancement of technology, batteries, with their advantages of portability, ease of charge and discharge, and long-term stable power supply, have become widely used in automobiles, home appliances, aerospace, and other fields.

[0083] The battery's tabs are the metal conductors that lead the positive and negative electrodes from the cell out of the casing. Therefore, during battery assembly, these tabs need to be extended outside the casing to serve as contact points during charging and discharging. However, during assembly, when the battery cell is assembled into the casing, the tabs tend to bend inside the casing and become unable to extend out, making it difficult to successfully assemble the cell and casing. This results in a more difficult battery assembly process and a lower battery yield rate.

[0084] In order to achieve accurate insertion of the electrode assembly into the shell and smoothly extend the pole ear from inside the shell to outside the shell, the pole ear can be guided when the electrode assembly is inserted into the shell so that the pole ear can smoothly extend from inside the shell to outside the shell.

[0085] Based on the above considerations, the present application provides a battery tab insertion device, assembly equipment, and assembly method. The battery includes a housing and an electrode assembly. The housing has a housing cavity, and a through-hole is formed in the housing, connecting the housing cavity with the outside world. The electrode assembly is disposed in the housing cavity. The tab insertion device is used to guide the tab portion of the electrode assembly to extend through the through-hole. The tab insertion device includes a clamping mechanism and a driving mechanism. The clamping mechanism is used to clamp the tab portion. The driving mechanism is transmission-connected to the clamping mechanism and is used to drive the clamping mechanism to move. The driving mechanism is configured to drive the clamping mechanism to clamp the tab portion located in the housing cavity and extend through the through-hole. In this way, the tab portion can be smoothly guided into the through-hole without affecting or damaging the housing, allowing the tab portion to smoothly extend out of the housing. This prevents the tab portion from obstructing the housing from being inserted into the electrode assembly, and prevents the tab portion from colliding with the housing, causing damage or preventing it from smoothly entering the through-hole. This allows for precise insertion of the electrode assembly into the housing, effectively improving the operational stability and reliability of the tab insertion device, reducing the difficulty of battery assembly, and improving battery assembly efficiency and yield.

[0086] The battery disclosed in the embodiments of the present application can be used in electrical devices that use the battery as a power source or various energy storage systems that use the battery as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0087] For the convenience of description, the following embodiments are described by taking a vehicle 1000a as an example of an electrical device according to an embodiment of the present application.

[0088] Referring to Figure 1, vehicle 1000a can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A power supply battery 100a is provided inside vehicle 1000a. The power supply battery 100a can be provided at the bottom, head, or tail of vehicle 1000a. The power supply battery 100a can be used to power vehicle 1000a. For example, the power supply battery 100a can serve as an operating power source for vehicle 1000a. Vehicle 1000a can also include a controller 200a and a motor 300a. The controller 200a is used to control the power supply battery 100a to power the motor 300a, for example, to meet the power requirements of vehicle 1000a during startup, navigation, and driving.

[0089] In some embodiments of the present application, the power supply battery 100a can not only serve as the operating power source of the vehicle 1000a, but also serve as the driving power source of the vehicle 1000a, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000a.

[0090] In some embodiments, the power supply battery 100a may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0091] The power supply battery 100 a mentioned in the embodiment of the present application refers to a single physical module including one or more batteries 1 to provide higher voltage and capacity.

[0092] In the embodiment of the present application, the battery 1 may be a secondary battery, which refers to a battery that can be recharged to activate the active material after discharge and continue to be used. Each battery 1 may also be a primary battery.

[0093] The battery 1 includes, but is not limited to, a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc. The battery 1 may be cylindrical, flat, rectangular, or have other shapes.

[0094] In some embodiments, the power supply battery 100a may be a battery module. When there are multiple batteries 1, the multiple batteries 1 are arranged and fixed to form a battery module.

[0095] In some embodiments, referring to FIG. 2 , the power supply battery 100 a may be a battery pack, which includes a box 10 a and a battery 1 , wherein the battery 1 or a battery module is housed in the box 10 a .

[0096] In some embodiments, the box 10a can serve as part of the chassis structure of the vehicle 1000a. For example, a portion of the box 10a can become at least a portion of the floor of the vehicle 1000a, or a portion of the box 10a can become at least a portion of the cross member and longitudinal member of the vehicle 1000a.

[0097] Referring to Figure 2 , a power supply battery 100a includes a housing 10a and a battery 1, which is housed within the housing 10a. The housing 10a provides storage space for the battery 1 and can have various structures. In some embodiments, the housing 10a can include a first portion 11a and a second portion 12a, which overlap each other and together define a storage space for the battery 1. The second portion 12a can be a hollow structure with one end open. The first portion 11a can be a plate-like structure, overlapping the open side of the second portion 12a, so that the first and second portions 11a and 12a together define the storage space. Alternatively, the first and second portions 11a and 12a can each be a hollow structure with one end open, with the open side of the first portion 11a overlapping the open side of the second portion 12a. Of course, the housing 10a formed by the first and second portions 11a and 12a can have various shapes, such as a cylinder or a rectangular parallelepiped.

[0098] In the power supply battery 100a, there may be multiple cells 1, and these cells 1 may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections. The multiple cells 1 may be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure of the multiple cells 1 is housed within the housing 10a. Alternatively, the power supply battery 100a may be constructed by first connecting multiple cells 1 in series, in parallel, or in a hybrid configuration to form a battery module, which is then connected in series, in parallel, or in a hybrid configuration to form a single structure, which is then housed within the housing 10a. The power supply battery 100a may also include other structures, such as a busbar assembly for electrically connecting the multiple cells 1.

[0099] 3 , the battery 1 is the smallest unit of the battery. As shown in FIG3 , the battery 1 includes a housing 10 , an electrode assembly 20 , and other functional components.

[0100] In some embodiments, the housing 10 is used to encapsulate the electrode assembly 20 and the electrolyte and other components. The housing 10 can be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0101] The battery 1 may include a bottom cover 30. The bottom cover 30 refers to a component that covers the opening of the shell 10 to isolate the internal environment of the battery 1 from the external environment. Without limitation, the shape of the bottom cover 30 can be adapted to the shape of the shell 10 to match the shell 10. Optionally, the bottom cover 30 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the bottom cover 30 is not easily deformed when squeezed or collided, so that the battery 1 can have a higher structural strength and improved safety performance. The material of the bottom cover 30 can also be various, for example, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating component can also be provided on the inner side of the bottom cover 30, and the insulating component can be used to isolate the electrical connection components in the shell 10 from the bottom cover 30 to reduce the risk of short circuit. Exemplarily, the insulating component can be plastic, rubber, etc.

[0102] The housing 10 is a component that cooperates with the bottom cover 30 to form the internal environment of the battery 1. This internal environment can accommodate the electrode assembly 20, electrolyte, and other components. The housing 10 and bottom cover 30 can be separate components. An open end 12 can be provided on the housing 10, and the bottom cover 30 is placed over the open end 12 to form the internal environment of the battery 1. Alternatively, the bottom cover 30 and the housing 10 can be integrated. Specifically, the bottom cover 30 and the housing 10 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 10 needs to be enclosed, the bottom cover 30 is placed over the housing 10. The housing 10 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylinder, or a hexagonal prism. Specifically, the shape of the housing 10 can be determined based on the specific shape and size of the electrode assembly 20. The housing 10 can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic. Functional components such as electrode terminals can be provided on the housing 10. The electrode terminals can be used to electrically connect to the electrode assembly 20 for outputting or inputting electrical energy into or out of the battery 1. In some embodiments, the housing 10 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery 1 reaches a threshold.

[0103] The electrode assembly 20 is a component where electrochemical reactions occur in the battery 1. One or more electrode assemblies 20 may be contained in the housing 10.

[0104] In some embodiments, the electrode assembly 20 includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery 1, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. The separator is positioned between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0105] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0106] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0107] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0108] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include but are not limited to at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides may include but are not limited to lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also referred to as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2 (also referred to as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2 (also referred to as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2 (also referred to as NCM 622), LiNi 0.8 Co 0.1 Mn 0.1 O2 (also referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2) and at least one of its modified compounds, etc.

[0109] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0110] As an example, the negative electrode current collector may be a metal foil, a metal foam, or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. may be used. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, etc. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0111] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0112] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is provided on either or both of the two facing surfaces of the negative electrode current collector.

[0113] As an example, the negative electrode active material may be a negative electrode active material for a battery that is well known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0114] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0115] In some embodiments, the electrode assembly 20 further includes a separator disposed between the positive electrode and the negative electrode.

[0116] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be selected.

[0117] As an example, the primary material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component positioned between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0118] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0119] In some embodiments, battery 1 further includes an electrolyte, which acts as a conductive medium between the positive and negative electrodes. The present application does not specifically limit the type of electrolyte, and the electrolyte may be selected based on needs. The electrolyte may be liquid, gel, or solid.

[0120] The liquid electrolyte includes an electrolyte salt and a solvent.

[0121] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.

[0122] In some embodiments, the solvent can be selected from at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methylpropyl carbonate, ethylpropyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone. The solvent can also be an ether solvent. Ether solvents can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.

[0123] Among them, the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.

[0124] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0125] As an example, the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, polyionic liquid-lithium salt, cellulose, or the like.

[0126] As an example, the inorganic solid electrolyte can be an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.

[0127] As an example, a composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0128] In some embodiments, the electrode assembly 20 is a wound structure in which the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0129] In some embodiments, the electrode assembly 20 includes tabs 21 that conduct current from the electrode assembly 20. The tabs 21 include a positive tab and a negative tab. The positive and negative tabs can be located together at one end of the main body or separately at opposite ends. During the charge and discharge process of the power supply battery 100a, the positive and negative active materials react with the electrolyte, and the tabs 21 connect to the electrode terminals to form a current loop.

[0130] According to some embodiments of the present application, as shown in Figure 3, the battery 1 may include a shell 10 and an electrode assembly 20, the shell 10 may have a accommodating cavity 11, and an open end 12 connected to the accommodating cavity 11, the shell 10 also has a top 13 arranged opposite to the open end 12, the top 13 may be provided with a through hole 14 connecting the accommodating cavity 11 and the outside world, one end of the electrode assembly 20 may be provided with a pole ear portion 21, the shell 10 is used to insert the electrode assembly 20 through the open end 12 along a preset assembly direction F1, so that the electrode assembly 20 is accommodated in the accommodating cavity 11 and the pole ear portion 21 passes through the through hole 14 and extends out from the through hole 14.

[0131] Optionally, as shown in FIG3 , the housing 10 may include a post 15 . The post 15 may be disposed at the top 13 of the housing 10 , and a through-hole 14 may be provided in the post 15 . The active material coating portion of the electrode assembly 20 is disposed within the housing 10 , and the tab 21 of the electrode assembly 20 may pass through the through-hole 14 and connect to the side of the post 15 facing away from the accommodating cavity 11 , thereby outputting the electrical energy within the electrode assembly 20 to the outside of the battery 1 . The housing 10 may be inserted into the electrode assembly 20 through the open end 12 to accommodate the electrode assembly 20 .

[0132] Optionally, as shown in FIG3 , the battery 1 may further include a bottom cover 30 , which is used to cover the opening end 12 so that the electrode assembly 20 is not likely to fall out of the opening end 12 after being placed in the shell.

[0133] According to some embodiments of the present application, optionally, as shown in FIG4 , the assembly device 3 includes a shell insertion device 40 and a tab insertion device 2, wherein the shell insertion device 40 is used to insert the electrode assembly 20 into the shell 10 from the open end 12 of the shell 10. The shell insertion device 40 includes a shell fixing mechanism 41 and a carrying assembly 42, wherein the shell fixing mechanism 41 is used to fix the shell 10, and the carrying assembly 42 is located below the shell fixing mechanism 41 and the tab insertion device 2 in the preset assembly direction F1, and is used to carry the electrode assembly 20.

[0134] Optionally, the electrode assembly 20 and the bottom cover 30 can be stacked sequentially on the carrier assembly 42 according to a preset assembly direction F1, so that after the electrode assembly 20 is placed in the shell, the bottom cover 30 can cover the open end 12. The carrier assembly 42 can also further secure the electrode assembly 20 and the bottom cover 30 to reduce the displacement of the electrode assembly 20 during transportation or shell placement.

[0135] The housing fixing mechanism 41 and the tab assembly 2 are configured to be able to rise and fall relative to the support assembly 42 along a preset assembly direction F1, so as to move away from or closer to the support assembly 42. Before clamping the tab portion 21, the tab assembly 2 is configured to penetrate into the accommodating cavity 11 through the through hole 14, and the housing fixing mechanism 41 is configured to insert the housing 10 into the electrode assembly 20 during the descent process. During the process of inserting the housing 10 into the electrode assembly 20, the tab assembly 2 can guide the tab portion 21 through the through hole 14 and extend out of the accommodating cavity 11.

[0136] Furthermore, the process of inserting the shell 10 into the electrode assembly 20 includes a first stage and a second stage arranged in a sequential order. In the first stage, the shell fixing mechanism 41 and the through-tab device 2 are configured to be able to descend together along a preset assembly direction F1 relative to the supporting assembly 42, so that the through-tab device 2 can contact the pole lug portion 21 in the accommodating cavity 11. In the second stage, the shell fixing mechanism 41 is configured to be able to descend along a preset assembly direction F1 relative to the through-tab device 2, so that the through-tab device 2 guides the pole lug portion 21 through the through hole 14 and extends out of the accommodating cavity 11. Before the first stage, the through-tab device 2 is configured to be able to descend along the preset assembly direction F1 relative to the shell fixing mechanism 41, and penetrate into the accommodating cavity 11 from the side of the top 13 through the through hole 14, and descend relative to the supporting assembly 42 together with the shell fixing mechanism 41 in the first stage.

[0137] Through the above method, when the shell 10 of the battery 1 is inserted into the electrode assembly 20, the pole ear portion 21 of the battery 1 can be smoothly guided through the through hole 14 to extend out of the accommodating cavity 11, so that the pole ear portion 21 can smoothly extend out of the shell 10, so that the pole ear portion 21 is not easy to block the shell 10 from being inserted into the electrode assembly 20, and the pole ear portion 21 is not easy to collide with the shell 10 to cause damage or fail to smoothly penetrate the through hole 14, thereby realizing the precise insertion of the electrode assembly 20 into the shell, effectively improving the working stability and reliability of the pole ear piercing device 2, effectively reducing the assembly difficulty of the battery 1, and effectively improving the assembly efficiency and yield of the battery 1.

[0138] Optionally, as shown in FIG5 , in some embodiments, the assembly device 3 includes a tab welding device 50, a post welding device 60, and a bottom cover welding device 70. The tab welding device 50 is used to weld the multiple tabs of the electrode assembly 20 to form the tab portion 21; the post welding device 60 is used to weld the tab portion 21 passing through the through hole 14 to the side of the post 15 of the housing 10 facing away from the accommodating cavity 11; and the bottom cover welding device 70 is used to weld the bottom cover 30 to the open end 12 of the housing 10.

[0139] In the above manner, by setting up the pole ear welding device 50, the pole post welding device 60 and the bottom cover welding device 70, the assembly equipment 3 can realize the formation of the pole ear portion 21, the connection between the pole ear portion 21 and the pole post 15, and the connection between the bottom cover 30 and the shell 10, which is beneficial to improving the connection stability of the various parts of the battery 1 and the stability and reliability of the battery 1.

[0140] It should be noted that in this embodiment, the structures to be assembled can be transported between the various workstations of the assembly equipment 3 via a conveyor device 4. The conveyor device 4 and the assembly equipment 3 together constitute the battery assembly system 5. The conveyor device 4 includes a conveyor line, which can be a conveyor structure formed by motor-driven conveyor rollers and a conveyor belt, a conveyor structure formed by motor-driven conveyor chain links, or an AGV conveyor vehicle. It only needs to be able to achieve conveyance in at least one direction and support and ensure the stability of the structures to be assembled.

[0141] The purpose of the tab welding device 50 is to pre-weld the tabs to form the tab portion 21. It can be an ultrasonic welding device that ensures the tabs are welded in a stable, clamped state. The purpose of the pole welding device 60 is to weld the tab portion 21 to the pole 15. It can be a laser welding device. The purpose of the bottom cover welding device 70 is to weld the circumferential edge of the bottom cover 30 to the open end 12 of the housing 10. It is also a laser welding device.

[0142] In addition, the assembly equipment 3 is not limited to including the tab welding device 50, the shell insertion device 40, the tab piercing device 2, the pole welding device 60 and the bottom cover welding device 70. For example, when the number of electrode assemblies 20 is multiple, for example, two, the assembly equipment 3 also includes a matching device 80, which is used to stack multiple electrode assemblies 20 so that the tabs of the two electrode assemblies 20 are roughly opposite to each other, so that the conveying structure can convey the matched electrode assemblies 20 to the tab welding device 50 for welding the tabs to facilitate the formation of the tab portion 21. For example, in order to ensure the reliability of the battery assembly process, dust removal, NG detection stations, etc. can also be added between any two adjacent stations, which is not limited in this embodiment.

[0143] According to some embodiments of the present application, as shown in FIG6 , the tab piercing device 2 includes a clamping mechanism 100 and a driving mechanism 200 . The clamping mechanism 100 is used to clamp the tab portion 21 , and the driving mechanism 200 is transmission-connected to the clamping mechanism 100 .

[0144] Among them, the clamping mechanism 100 is used to clamp the pole ear part 21, and the driving mechanism 200 is transmission-connected to the clamping mechanism 100 and is used to drive the clamping mechanism 100 to move. The driving mechanism 200 is configured to drive the clamping mechanism 100 to clamp the pole ear part 21 located in the accommodating cavity 11 and extend it out of the accommodating cavity 11 through the through hole 14.

[0145] Optionally, the clamping mechanism 100 is configured to pass through the through-hole 14 and extend into the accommodating cavity 11 before clamping the pole lug 21. During the process of inserting the housing 10 into the electrode assembly 20, the driving mechanism 200 is configured to drive the clamping mechanism 100 to clamp the pole lug 21 in the accommodating cavity 11 and drive the clamping mechanism 100 to guide the pole lug 21 through the through-hole 14 and extend out of the accommodating cavity 11. The driving mechanism 200 may include a motor that provides power to the clamping mechanism 100 to clamp the pole lug 21. The motor may be a DC motor or an AC motor.

[0146] Through the above method, by setting a clamping mechanism 100 that can clamp the pole ear portion 21, and setting a driving mechanism 200 that transmits and connects the clamping mechanism 100, it can be achieved that during the assembly process of the battery 1, when the shell 10 is inserted into the electrode assembly 20 through the open end 12, the driving mechanism 200 drives the clamping mechanism 100 to clamp the pole ear portion 21, and under the premise of not affecting and damaging the shell 10, the pole ear portion 21 can be guided to smoothly penetrate into the through hole 14, so that the pole ear portion 21 can smoothly extend out of the shell 10, so that the pole ear portion 21 is not easy to block the shell 10 from being inserted into the electrode assembly 20, and the pole ear portion 21 is not easy to collide with the shell 10 and cause damage or fail to smoothly penetrate the through hole 14, thereby achieving precise insertion of the electrode assembly 20, effectively improving the working stability and reliability of the pole ear insertion device 2, effectively reducing the assembly difficulty of the battery 1, and effectively improving the assembly efficiency and yield rate of the battery 1.

[0147] According to some embodiments of the present application, optionally, as shown in FIG7 , the clamping mechanism 100 includes a plurality of clamping plates 130, and the driving mechanism 200 is in transmission connection with at least one of the plurality of clamping plates 130, for driving the at least one clamping plate 130 to move. Optionally, the driving mechanism 200 is configured to drive the plurality of clamping plates 130 to clamp the circumference of the pole lug portion 21 so that the pole lug portion 21 can extend out of the accommodating cavity 11, and is configured to enable the plurality of clamping plates 130 to loosen the circumference of the pole lug portion 21 to release the pole lug portion 21.

[0148] In the above manner, by setting up multiple clamping plates 130 to clamp the pole ear portion 21, the efficiency of clamping and releasing the pole ear portion 21 can be improved, and the circumferential clamping of the pole ear portion 21 by multiple clamping plates 130 can improve the stability of clamping, effectively improving the reliability of the clamping mechanism 100.

[0149] According to some embodiments of the present application, optionally, as shown in Figures 3 and 7, the multiple clamping plates 130 include a first clamping plate 110 and a second clamping plate 120, and the driving mechanism 200 is configured to drive the first clamping plate 110 and the second clamping plate 120 to abut against both sides of the thickness direction F4 of the clamping pole ear portion 21.

[0150] In the above manner, by providing the first clamping plate 110 and the second clamping plate 120 that can clamp the two sides of the thickness direction F4 of the pole ear portion 21, wherein the two sides of the thickness direction F4 of the pole ear portion 21 are the two side surfaces with larger areas, thereby increasing the contact area between the first clamping plate 110 and the second clamping plate 120 and the pole ear portion 21 when clamping the pole ear portion 21, thereby achieving clamping of the pole ear portion 21 without causing damage to the pole ear portion 21, which is beneficial to improving the reliability of the clamping mechanism 100.

[0151] According to some embodiments of the present application, optionally, as shown in FIG. 7 and FIG. 8 , the driving mechanism 200 is used to drive at least one clamping plate 130 to rotate, so that multiple clamping plates 130 can clamp or release the pole lug portion 21 together.

[0152] In the above manner, by setting a driving mechanism 200 to drive at least one clamping plate 130 to rotate, multiple clamping plates 130 can be used to jointly clamp or release the pole ear portion 21, effectively reducing the difficulty of the clamping mechanism 100 switching between clamping and releasing the pole ear portion 21, which is beneficial to improving the working efficiency of the pole ear piercing device 2.

[0153] According to some embodiments of the present application, optionally, as shown in Figures 7 and 8, the driving mechanism 200 is transmission-connected to the first clamping plate 110 and the second clamping plate 120, or the driving mechanism 200 is transmission-connected to the first clamping plate 110 or the second clamping plate 120, for driving the first clamping plate 110 and / or the second clamping plate 120 to move, thereby realizing relative movement of the first clamping plate 110 and the second clamping plate 120 to enable the first clamping plate 110 and the second clamping plate 120 to abut against both sides of the pole ear portion 21 to clamp the pole ear portion 21, and enable the first clamping plate 110 and the second clamping plate 120 to detach from both sides of the pole ear portion 21 to release the pole ear portion 21.

[0154] In the above manner, by providing a clamping mechanism 100 including a first clamping plate 110 and a second clamping plate 120, and providing a driving mechanism 200 that is transmission-connected to the first clamping plate 110 and / or the second clamping plate 120 and is used to drive the first clamping plate 110 and / or the second clamping plate 120 to move, the clamping mechanism 100 is prevented from contacting the pole ear portion 21 before clamping the pole ear portion 21, so that the pole ear portion 21 can enter the clampable range of the clamping mechanism 100, and then the first clamping plate 110 and the second clamping plate 120 are pressed against each other. It is connected to both sides of the pole ear 21 to clamp the pole ear 21, and after the pole ear 21 passes through the through hole 14, the first clamping plate 110 and the second clamping plate 120 are separated from both sides of the pole ear 21 to release the pole ear 21. The assembly process is simple and smooth. By abutting against both sides of the pole ear 21 for clamping, the pole ear 21 can be guided to smoothly pass through the through hole 14 without causing damage to the pole ear 21, which is beneficial to improving the efficiency of the pole ear 21 passing through the through hole 14 and effectively improving the stability and reliability of the operation of the pole ear piercing device 2.

[0155] According to some embodiments of the present application, optionally, as shown in Figures 7 to 9, the driving mechanism 200 is used to drive the first clamping plate 110 and the second clamping plate 120 to rotate, or the driving mechanism 200 is used to drive the first clamping plate 110 or the second clamping plate 120 to rotate, so that the first clamping plate 110 and the second clamping plate 120 can clamp or release the pole ear portion 21.

[0156] In the above manner, the first clamping plate 110 and / or the second clamping plate 120 are rotated to achieve relative movement therebetween, thereby enabling the first clamping plate 110 and the second clamping plate 120 to switch between abutting the pole ear portion 21 and disengaging from the pole ear portion 21, thereby effectively reducing the difficulty of the clamping mechanism 100 in switching between clamping and releasing the pole ear portion 21, which is beneficial to improving the working efficiency of the pole ear piercing device 2.

[0157] According to some embodiments of the present application, optionally, as shown in Figures 7 and 8, the driving mechanism 200 is used to drive the first clamping plate 110 and the second clamping plate 120 to rotate, the first clamping plate 110 is configured to be able to rotate around the first rotation axis L1, and the second clamping plate 120 is configured to be able to rotate around the second rotation axis L2, and the first rotation axis L1 and the second rotation axis L2 are arranged side by side.

[0158] Optionally, the first clamping plate 110 rotates about the first rotation axis L1 to switch between a first clamping position and a first release position, and the second clamping plate 120 rotates about the second rotation axis L2 to switch between a second clamping position and a second rotation position. When the first clamping plate 110 is in the first release position and the second clamping plate 120 is in the second release position, their relative positions are in the release position, and the first clamping plate 110 and the second clamping plate 120 are spaced apart from each other. When the first clamping plate 110 is in the first clamping position and the second clamping plate 120 is in the second clamping position, their relative positions are in the clamping position, and the first clamping plate 110 and the second clamping plate 120 are rotated until they at least partially overlap.

[0159] Optionally, the first rotation axis L1 and the second rotation axis L2 are arranged in parallel. When the clamping mechanism 100 is switched from the release position to the clamping position, the first clamping plate 110 and the second clamping plate 120 rotate in the same direction around the first rotation axis L1 and the second rotation axis L2 respectively. They can be rotated in a clockwise direction or a counterclockwise direction until the first clamping plate 110 and the second clamping plate 120 are rotated to at least partially overlap with each other. When clamping the pole ear portion 21 in the clamping position, the first clamping plate 110 and the second clamping plate 120 respectively abut against both sides of the pole ear portion 21 to clamp the pole ear portion 21 using the overlapping part of the first clamping plate 110 and the second clamping plate 120.

[0160] In the above manner, by providing the first clamping plate 110 and the second clamping plate 120 which can respectively rotate around the first rotation axis L1 and the second rotation axis L2, and the first rotation axis L1 and the second rotation axis L2 are provided side by side, it is achieved that in the release position, the first clamping plate 110 and the second clamping plate 120 are spaced apart from each other, so that the pole ear portion 21 can enter between the two. When switching to the clamping position, the first clamping plate 110 and the second clamping plate 120 rotate simultaneously, and respectively rotate to at least partially overlap with each other, so that the overlapping part of the two clamps the pole ear portion 21. The structure is simple and the operation is convenient, which is conducive to improving the clamping efficiency of the clamping mechanism 100 and effectively improving the working reliability of the clamping assembly.

[0161] According to some embodiments of the present application, optionally, as shown in Figure 9, the driving mechanism 200 is transmission-connected to the first clamping plate 110 for driving the first clamping plate 110 to rotate around a preset rotation axis L3, and the second clamping plate 120 is spaced apart from the preset rotation axis L3 and relatively fixed.

[0162] Optionally, the first clamping plate 110 rotates about a predetermined rotation axis L3 to switch between a first clamping position and a first release position, and the second clamping plate 120 is fixedly disposed in the second clamping position. When the first clamping plate 110 rotates to the first release position, the second clamping plate 120 is in the second clamping position, and the relative position of the first clamping plate 110 and the second clamping plate 120 is the release position, at which point the second clamping plate 120 and the first clamping plate 110 are spaced apart from each other. When the first clamping plate 110 rotates to the first clamping position, the second clamping plate 120 is in the second clamping position, and the relative position of the first clamping plate 110 and the second clamping plate 120 is the clamping position, at which point the first clamping plate 110 rotates to at least partially overlap with the second clamping plate 120.

[0163] Optionally, the first clamping plate 110 is rotated around a preset rotation axis L3 to switch the release position and the clamping position between the first clamping plate 110 and the second clamping plate 120. The first clamping plate 110 can be rotated in a clockwise direction or a counterclockwise direction. In the clamping position, the first clamping plate 110 and the second clamping plate 120 are respectively located on both sides of the pole ear portion 21 to clamp the pole ear portion 21 using the overlapping part of the first clamping plate 110 and the second clamping plate 120.

[0164] In the above manner, the first clamping plate 110 is driven to rotate by the driving mechanism 200 to switch the release position and the clamping position between the first clamping plate 110 and the second clamping plate 120, thereby facilitating the proper positioning of the pole ear portion 21 using the second clamping plate 120 when in the release position, and when switching to the clamping position, the first clamping plate 110 is rotated to at least partially overlap with the second clamping plate 120, so as to use the overlapping parts to clamp the pole ear portion 21, which is beneficial to improving the clamping accuracy and effectively improving the working reliability of the clamping assembly.

[0165] According to some embodiments of the present application, optionally, as shown in Figure 9, the first clamping plate 110 and the second clamping plate 120 are rotatably connected, the first clamping plate 110 and the second clamping plate 120 can rotate relative to each other around the same preset rotation axis L3, and the driving mechanism 200 is transmission-connected to the first clamping plate 110 and / or the second clamping plate 120 to drive the first clamping plate 110 and / or the second clamping plate 120 to rotate around the preset rotation axis L3.

[0166] In the above manner, by providing the first clamping plate 110 and the second clamping plate 120 that rotate about the same preset rotation axis L3, the release position and the clamping position between the first clamping plate 110 and the second clamping plate 120 can be smoothly switched, thereby facilitating smooth clamping and guiding the tab portion 21 to penetrate the through-hole 14, effectively improving the clamping efficiency of the clamping mechanism 100, and effectively improving the working reliability of the tab piercing device 2. Moreover, the first clamping plate 110 and the second clamping plate 120 are arranged to rotate about the same preset rotation axis L3, which facilitates the installation and positioning of the first clamping plate 110 and the second clamping plate 120, and helps to reduce the difficulty of loading and unloading the tab piercing device 2.

[0167] According to some embodiments of the present application, optionally, as shown in Figures 7 and 8, the drive mechanism 200 is used to drive the first clamping plate 110 and / or the second clamping plate 120 to rotate so that the relative position of the first clamping plate 110 and the second clamping plate 120 can be switched between a clamping position and a release position. In the clamping position, the first clamping plate 110 and the second clamping plate 120 at least partially overlap and abut against each other in the thickness direction F4 of the pole ear portion 21 to clamp both sides of the thickness direction F4 of the pole ear portion 21; in the release position, the abutment between the first clamping plate 110 and the second clamping plate 120 is canceled to release the pole ear portion 21. In some embodiments, in the release position, the first clamping plate 110 and the second clamping plate 120 are arranged flatly with a gap.

[0168] In the above manner, by arranging the first clamping plate 110 and the second clamping plate 120 at intervals in the release position, the space occupied by the clamping mechanism 100 can be reduced, and the installation and positioning of the first clamping plate 110 and the second clamping plate 120 can be facilitated. In the clamping position, the first clamping plate 110 and the second clamping plate 120 are at least partially overlapped to abut against the two sides of the pole ear portion 21, which improves the stability of the clamping while not easily causing damage to the pole ear portion 21, thereby effectively improving the working reliability of the clamping assembly.

[0169] According to some embodiments of the present application, optionally, as shown in FIG8 , when the relative position between the first clamping plate 110 and the second clamping plate 120 is in the release position, an escape space 201 for accommodating the pole lug 21 is formed between the first clamping plate 110 and the second clamping plate 120. When the relative position between the first clamping plate 110 and the second clamping plate 120 is in the clamping position, the overlapping portions of the first clamping plate 110 and the second clamping plate 120 are respectively located on two opposite sides of the pole lug 21 to clamp the pole lug 21.

[0170] Through the above method, it is possible to achieve that the pole ear portion 21 enters the avoidance space 201 formed between the first clamping plate 110 and the second clamping plate 120 when in the release position, so that when switching to the clamping position, the first clamping plate 110 and the second clamping plate 120 only need to rotate to achieve the use of the two sides of the pole ear portion 21 to clamp the pole ear portion 21, without the need for additional position adjustment, effectively improving the clamping efficiency of the clamping mechanism 100, and the overlapping parts of the two are respectively located on the two opposite side surfaces of the pole ear portion 21, which is conducive to improving the stability of clamping, effectively reducing the possibility of damage to the pole ear portion 21, and effectively improving the working reliability of the clamping mechanism 100.

[0171] According to some embodiments of the present application, optionally, as shown in FIG8 , the first clamping plate 110 is provided with a first avoidance notch 202, and the second clamping plate 120 is provided with a second avoidance notch 203. When the relative position between the first clamping plate 110 and the second clamping plate 120 is in the released position, the first avoidance notch 202 and the second avoidance notch 203 are arranged opposite each other, and a spacing space 204 is provided between the first avoidance notch 202 and the second avoidance notch 203. The first avoidance notch 202, the second avoidance notch 203, and the spacing space 204 are connected to each other to form the avoidance space 201.

[0172] Through the above method, the first avoidance gap 202, the second avoidance gap 203 and the spacing space 204 are set to connect and form the avoidance space 201, which is conducive to the pole ear part 21 to smoothly enter the avoidance space 201 when the relative position between the first clamping plate 110 and the second clamping plate 120 is in the release position, without interfering with the first clamping plate 110 and the second clamping plate 120 to cause damage, and the setting of the first avoidance gap 202 and the second avoidance gap 203 can reduce the size of the space required to be occupied by the clamping mechanism 100 while ensuring the size of the avoidance space 201, which is conducive to improving the utilization rate of the space and effectively improving the working reliability of the clamping mechanism 100.

[0173] According to some embodiments of the present application, optionally, as shown in FIG8 , the first clamping plate 110 includes a first plate body 111 and a first rotating portion 112, the first rotating portion 112 protruding from a side edge of the first plate body 111 to form a first avoidance gap 202 between the first rotating portion 112 and the first plate body 111, and the driving mechanism 200 is in transmission connection with the first rotating portion 112 to drive the first rotating portion 112 to rotate about the first rotation axis L1. Optionally, the second clamping plate 120 includes a second plate body 121 and a second rotating portion 122, the second rotating portion 122 protruding from a side edge of the second plate body 121 to form a second avoidance gap 203 between the second rotating portion 122 and the second plate body 121, and the driving mechanism 200 is in transmission connection with the second rotating portion 122 to drive the second rotating portion 122 to rotate about the second rotation axis L2.

[0174] Through the above method, the first plate body 111 and the first rotating part 112 are set to form a first avoidance gap 202, and the second plate body 121 and the second rotating part 122 are set to form a second avoidance gap 203, so that when the relative position between the first clamping plate 110 and the second clamping plate 120 is in the release position, the pole ear part 21 can be accommodated in the avoidance space 201, and when switching to the clamping position, the driving mechanism 200 only needs to drive the first rotating part 112 and the second rotating part 122 to rotate to drive the first plate body 111 and the second plate body 121 to rotate, so as to achieve clamping of the pole ear part 21. It is easy to operate and has a simple structure, which effectively improves the clamping efficiency and working reliability of the clamping mechanism 100.

[0175] According to some embodiments of the present application, as shown in Figures 7 and 8, the first clamping plate 110 and the second clamping plate 120 may rotate in the same direction. In some embodiments, the first rotation axis L1 and the second rotation axis L2 are parallel to each other. In some embodiments, the first rotation axis L1 and the second rotation axis L2 are perpendicular to the top 13 or parallel to the axis of the through hole 14.

[0176] Through the above method, the difficulty of installing and positioning the first clamping plate 110 and the second clamping plate 120 is effectively reduced, and it is conducive to smoothly clamping and guiding the pole ear portion 21 to penetrate the through hole 14, effectively improving the clamping efficiency of the clamping mechanism 100 and effectively improving the working reliability of the pole ear piercing device 2.

[0177] According to some embodiments of the present application, optionally, as shown in FIG8 , the ratio of the width of the first clamping plate 110 in the direction F2 perpendicular to the first rotation axis L1 to the width of the second clamping plate 120 in the direction F3 perpendicular to the second rotation axis L2 is 0.5 to 2. In some embodiments, the length of the first clamping plate 110 along the first rotation axis L1 is the same as the length of the second clamping plate 120 along the second rotation axis L2.

[0178] In some embodiments, a ratio of a width of the first clamping plate 110 in the direction F2 perpendicular to the first rotation axis L1 to a width of the second clamping plate 120 in the direction F3 perpendicular to the second rotation axis L2 is 0.5. In some embodiments, a ratio of a width of the first clamping plate 110 in the direction F2 perpendicular to the first rotation axis L1 to a width of the second clamping plate 120 in the direction F3 perpendicular to the second rotation axis L2 is 1. In some embodiments, a ratio of a width of the first clamping plate 110 in the direction F2 perpendicular to the first rotation axis L1 to a width of the second clamping plate 120 in the direction F3 perpendicular to the second rotation axis L2 is 1.5. In some embodiments, a ratio of a width of the first clamping plate 110 in the direction F2 perpendicular to the first rotation axis L1 to a width of the second clamping plate 120 in the direction F3 perpendicular to the second rotation axis L2 is 2.

[0179] In the above manner, by properly setting the ratio of the width of the first clamping plate 110 in the direction F2 perpendicular to the first rotation axis L1 to the width of the second clamping plate 120 in the direction F3 perpendicular to the second rotation axis L2, the clamping mechanism 100 can be effectively operated while effectively improving the clamping stability of the pole lug 21, and effectively reducing the possibility of the pole lug 21 being unable to be stably and reliably clamped due to the ratio of the two widths being too small or too large. Properly setting the lengths of the first clamping plate 110 and the second clamping plate 120 can effectively ensure the area of ​​the overlapping portion between the two in the clamping position, effectively improving space utilization while providing effective and reliable clamping of the pole lug 21.

[0180] According to some embodiments of the present application, optionally, as shown in FIG6 , the tab piercing device 2 includes a transmission mechanism 300 , the driving mechanism 200 is in transmission connection with the transmission mechanism 300 , and the transmission mechanism 300 is in transmission connection with the first clamping plate 110 and the second clamping plate 120 .

[0181] In the above manner, by setting up the transmission mechanism 300, a transmission connection is achieved between the driving mechanism 200 and the first clamping plate 110 and the second clamping plate 120, providing a basis for switching between the release position and the clamping position, and effectively improving the working reliability of the piercing ear device 2.

[0182] According to some embodiments of the present application, optionally, as shown in FIG7 , the transmission mechanism 300 includes a first transmission rod 310 that rotates about a first rotation axis L1 and a second transmission rod 320 that rotates about a second rotation axis L2. The first transmission rod 310 is connected to the first clamping plate 110, and the second transmission rod 320 is connected to the second clamping plate 120. The driving mechanism 200 is in transmission connection with the first transmission rod 310 and the second transmission rod 320, and is configured to drive the first transmission rod 310 to rotate about the first rotation axis L1 and the second transmission rod 320 to rotate about the second rotation axis L2.

[0183] Through the above method, by setting the first transmission rod 310 and the second transmission rod 320, the driving mechanism 200 can respectively drive the first transmission rod 310 and the second transmission rod 320 to rotate to respectively drive the first clamping plate 110 and the second clamping plate 120 to rotate, so as to realize the first clamping plate 110 and the second clamping plate 120 to rotate around the first rotation axis and the second rotation axis respectively, thereby realizing the switching of the release position and the clamping position, effectively improving the working reliability of the piercing ear device 2.

[0184] According to some embodiments of the present application, optionally, as shown in Figure 7, the transmission mechanism 300 includes a connecting rod mechanism 330, which is transmission-connected to the first transmission rod 310 and the second transmission rod 320, and the driving mechanism 200 is transmission-connected to the connecting rod mechanism 330, and the driving mechanism 200 is used to drive the first transmission rod 310 and the second transmission rod 320 to rotate through the connecting rod mechanism 330.

[0185] In the above manner, by setting up a connecting rod mechanism 330 to drive the first transmission rod 310 and the second transmission rod 320 to rotate, it is beneficial to smoothly switch the release position and the clamping position, thereby facilitating the clamping of the pole ear portion 21, effectively improving the working reliability of the pole ear piercing device 2, and the connecting rod mechanism 330 has a stable structure, is easy to load and unload, and is easy to install and maintain.

[0186] According to some embodiments of the present application, optionally, as shown in Figures 10 and 11, the linkage mechanism 330 includes a base 370, a first link 331, a second link 332, and a third link 333. The first link 331, the second link 332, and the third link 333 are arranged on one side of the base 370, and the third link 333 is respectively connected to the first link 331 and the second link 332 in a transmission manner. The driving mechanism 200 is used to drive the third link 333 to rotate. The first transmission rod 310 and the second transmission rod 320 are arranged on the other side of the base 370 and are respectively connected to the first link 331 and the second link 332 in a transmission manner.

[0187] In the above manner, by setting a connecting rod mechanism 330 to drive the first transmission rod 310 and the second transmission rod 320 to rotate, it is beneficial to smoothly switch the release position and clamping position of the clamping mechanism 100, thereby facilitating the clamping of the pole ear portion 21, effectively improving the working reliability of the pole ear device 2, and the connecting rod mechanism 330 has a strong load-bearing capacity and good impact resistance, which is beneficial to improving the service life of the pole ear device 2.

[0188] Further, as shown in Figures 10 and 11, one end of the first link 331 and one end of the second link 332 are respectively connected to the two ends of the third link 333, and the other end of the first link 331 and the other end of the second link 332 are respectively connected to the base 370. The driving mechanism 200 drives the third link 333 to rotate, and the third link 333 drives the first link 331 and the second link 332 to rotate, thereby driving the first transmission rod 310 and the second transmission rod 320 to rotate to switch the release position and the clamping position. As shown in Figure 11, the clamping mechanism 100 is in the release position, and as shown in Figure 10, the clamping mechanism 100 is in the clamping position.

[0189] According to some embodiments of the present application, optionally, as shown in Figure 12, the transmission mechanism 300 includes an input shaft 340 and a coupling 350, the driving mechanism 200 has an output shaft 210, the input shaft 340 and the output shaft 210 are connected through the coupling 350, and the input shaft 340 is transmission-connected to the connecting rod mechanism 330.

[0190] In the above manner, by setting the input shaft 340 and the coupling 350, the power output by the output shaft 210 of the driving mechanism 200 is input to the connecting rod mechanism 330 through the coupling 350 and the input shaft 340. It is easy to operate and has a simple structure, which effectively improves the working stability and reliability of the transmission mechanism 300.

[0191] According to some embodiments of the present application, optionally, as shown in Figure 13, the transmission mechanism 300 includes a gear mechanism 360, which is transmission-connected to the first transmission rod 310 and the second transmission rod 320, and the driving mechanism 200 is transmission-connected to the gear mechanism 360, and the driving mechanism 200 is used to drive the first transmission rod 310 and the second transmission rod 320 to rotate through the gear mechanism 360.

[0192] In the above manner, by setting up a gear mechanism 360 to drive the first transmission rod 310 and the second transmission rod 320 to rotate, it is beneficial to smoothly switch the release position and the clamping position of the clamping mechanism 100, thereby facilitating the clamping of the pole ear portion 21, effectively improving the working reliability of the pole ear piercing device 2, and the gear mechanism 360 has a stable structure and a low manufacturing cost, is convenient for positioning, installation and disassembly, and effectively reduces the difficulty of installation and maintenance.

[0193] According to some embodiments of the present application, optionally, as shown in FIG13 , the gear mechanism 360 includes a base 370, a main gear 363, a first slave gear 361, and a second slave gear 362. The main gear 363, the first slave gear 361, and the second slave gear 362 are disposed on one side of the base 370, and the first slave gear 361 and the second slave gear 362 are meshed with each other. The drive mechanism 200 is used to drive the first driving wheel to rotate. The first transmission rod 310 and the second transmission rod 320 are disposed on the other side of the base 370 and are respectively connected to the first slave gear 361 and the second slave gear 362.

[0194] In the above manner, by driving the first main gear 363 to rotate through the driving mechanism 200, the rotation of the first slave gear 361 and the second slave gear 362 can be realized, thereby realizing the switching of the release position and the clamping position of the clamping mechanism 100. It is convenient to operate, has a simple structure, is easy to load and unload, and has high structural stability, which is beneficial to improving the service life of the gear mechanism 360 and the working reliability of the piercing ear device 2.

[0195] According to some embodiments of the present application, optionally, as shown in Figure 12, the transmission mechanism 300 includes an input shaft 340 and a coupling 350, the driving mechanism 200 has an output shaft 210, the input shaft 340 and the output shaft 210 are connected through the coupling 350, and the input shaft 340 is transmission-connected to the gear mechanism 360.

[0196] In the above manner, by setting the input shaft 340 and the coupling 350, the power output by the output shaft 210 of the driving mechanism 200 is input to the gear mechanism 360 through the coupling 350 and the input shaft 340. It is easy to operate and has a simple structure, which effectively improves the working stability and reliability of the transmission mechanism 300.

[0197] According to some embodiments of the present application, optionally, as shown in FIG. 12 , the tab device 2 includes a flange seat 400 , and the driving mechanism 200 and the transmission mechanism 300 are connected via the flange seat 400 .

[0198] In the above manner, the connection between the driving mechanism 200 and the transmission mechanism 300 is achieved by setting the flange seat 400, which effectively improves the connection stability between the driving mechanism 200 and the transmission mechanism 300, and is conducive to improving the working stability and reliability of the transmission mechanism 300.

[0199] Furthermore, the process of inserting the housing 10 into the electrode assembly 20 includes a first stage, in which the clamping mechanism 100 is configured to move relative to the electrode assembly 20 together with the housing 10 to clamp the electrode ear portion 21 in the first stage. The process of inserting the housing 10 into the electrode assembly 20 includes a second stage located after the first stage, in which the clamping mechanism 100 is configured to move relative to the housing 10 in a direction away from each other and maintain the clamping of the electrode ear portion 21, thereby clamping the electrode ear portion 21 through the through hole 14 and extending out of the accommodating cavity 11.

[0200] Through the above-described method, by moving the clamping mechanism 100 and the housing 10 together relative to the electrode assembly 20 in the first stage, the clamping mechanism 100 can approach the pole ear portion 21 while the electrode assembly 20 is gradually inserted into the housing, so as to facilitate the clamping of the pole ear portion 21 in the first stage. The pole ear portion 21 can be clamped smoothly and fluently, effectively improving the clamping efficiency of the clamping mechanism 100 and the assembly efficiency of the battery 1. By moving the clamping mechanism 100 and the housing 10 relative to each other in a direction away from each other in the second stage while maintaining the clamping of the pole ear portion 21, the pole ear portion 21 can be guided through the through hole 14 and out of the accommodating cavity 11 while the electrode assembly 20 is further inserted into the housing. The assembly process is smooth and clear, effectively improving the efficiency of the pole ear portion 21 passing through the through hole 14 and the assembly efficiency of the battery 1.

[0201] According to some embodiments of the present application, optionally, as shown in Figures 7 and 8, the driving mechanism 200 is used to drive the clamping mechanism 100 to switch between a clamping position and a release position, and the clamping mechanism 100 is used to switch from the release position to the clamping position to clamp the pole lug portion 21. Before the first stage, the driving mechanism 200 is used to drive the clamping mechanism 100 to the clamping position, and the clamping mechanism 100 is configured to be movable relative to the housing 10 so as to pass through the through hole 14 and extend into the accommodating cavity 11 in the clamping position. The driving mechanism 200 is used to drive the clamping mechanism 100 to switch from the clamping position to the release position after the clamping mechanism 100 extends into the accommodating cavity 11.

[0202] Through the above-described method, the clamping mechanism 100 in the clamping position in the first stage can smoothly pass through the through hole 14 and extend into the accommodating cavity 11. Compared with the case where the clamping mechanism 100 is in the release position and penetrates the through hole 14, the space occupied by the clamping mechanism 100 can be effectively reduced, and the area of ​​the through hole 14 required for the clamping mechanism to penetrate the through hole 14 can be reduced, thereby effectively improving space utilization. After the clamping mechanism 100 is inserted into the accommodating cavity 11, it switches from the clamping position to the release position, facilitating the entry of the pole lug portion 21 into the clampable range of the clamping mechanism 100, facilitating the clamping of the pole lug portion 21, and effectively improving the reliability of the operation of the pole lug piercing device 2.

[0203] According to some embodiments of the present application, as shown in FIG14 , the assembly method of the battery 1 of the present application may include the following steps.

[0204] S100: Control the clamping mechanism to pass through the through hole and extend into the accommodating cavity, and control the shell to be inserted into the electrode assembly.

[0205] First, the clamping mechanism 100 in the clamping position is controlled to pass through the through hole 14 and extend into the accommodating cavity 11 relative to the first clamping plate 110 and the second clamping plate 120 to reduce the required area of ​​the through hole 14 and reduce the possibility of damaging the shell 10. Then, the clamping mechanism 100 and the shell 10 are controlled to descend along the preset assembly direction F1 to approach the electrode assembly 20, and the shell 10 is inserted into the electrode assembly 20.

[0206] S200: During the process of inserting the housing into the electrode assembly, the driving mechanism is controlled to drive the clamping mechanism to clamp the electrode ear portion in the accommodating cavity, and the clamping mechanism is driven to guide the electrode ear portion to extend out of the accommodating cavity through the through hole.

[0207] The process of inserting the housing 10 into the electrode assembly 20 includes a first stage and a second stage, which are arranged in a sequential order. In the first stage, the clamping mechanism 100 and the housing 10 are controlled to move together relative to the electrode assembly 20. The clamping mechanism 100 is controlled to switch the relative position between the first clamping plate 110 and the second clamping plate 120 to a released position within the accommodating cavity 11, so that the electrode lug 21 enters the clamping range of the clamping mechanism 100. After the electrode lug 21 enters the clamping range of the clamping mechanism 100, the relative position between the first clamping plate 110 and the second clamping plate 120 is switched to a clamping position, thereby clamping the electrode lug 21 in the first stage. In the second stage, the clamping mechanism 100 and the housing 10 are controlled to move relative to each other in a direction away from each other, and the clamping mechanism 100 maintains the clamping of the electrode lug 21, thereby clamping the electrode lug 21 through the through hole 14 and extending out of the accommodating cavity 11, and allowing the housing 10 to be further inserted into the electrode assembly 20.

[0208] Through the above method, the clamping mechanism 100 can clamp the pole ear portion 21 while the electrode assembly 20 is gradually inserted into the shell, and the pole ear portion 21 of the battery 1 can be smoothly guided through the through hole 14 to extend out of the accommodating cavity 11, so that the pole ear portion 21 is not easy to block the shell 10 from being inserted into the electrode assembly 20, and the pole ear portion 21 is not easy to collide with the shell 10 to cause damage or fail to smoothly penetrate the through hole 14, thereby achieving precise insertion of the electrode assembly 20 into the shell, and guiding the pole ear portion 21 through the through hole 14 to extend out of the accommodating cavity 11 while the shell 10 is inserted into the electrode assembly 20, effectively improving the working stability and reliability of the pole ear piercing device 2, effectively reducing the assembly difficulty of the battery 1, and effectively improving the assembly efficiency and yield of the battery 1.

[0209] According to some embodiments of the present application, optionally, as shown in Figures 3 to 12, the battery 1 includes a shell 10 and an electrode assembly 20. The shell 10 has a housing 11. A through hole 14 is opened on the shell 10 to connect the housing 11 with the outside world. The electrode assembly 20 is disposed in the housing 11. The tab-piercing device 2 is used to guide the tab portion 21 of the electrode assembly 20 to extend from the through hole 14. The tab-piercing device 2 includes a clamping mechanism 100 and a driving mechanism 200. The clamping mechanism 100 is used to clamp the tab portion 21. The driving mechanism 200 is in transmission connection with the clamping mechanism 100 and is used to drive the clamping mechanism 100 to move. The driving mechanism 200 is configured to drive the clamping mechanism 100 to clamp the tab portion 21 located in the housing 11 and extend it through the through hole 14 out of the housing 11. The clamping mechanism 100 includes a plurality of clamping plates 130. The driving mechanism 200 is in transmission connection with at least one of the plurality of clamping plates 130 and is used to drive at least one clamping plate 130 to move. Furthermore, the drive mechanism 200 is configured to drive the multiple clamping plates 130 to clamp the circumference of the pole lug 21, allowing the pole lug 21 to extend out of the accommodating cavity 11, and to release the circumference of the pole lug 21. The multiple clamping plates 130 include a first clamping plate 110 and a second clamping plate 120. The drive mechanism 200 is configured to drive the first clamping plate 110 and the second clamping plate 120 to abut against both sides of the thickness direction F4 of the pole lug 21. The drive mechanism 200 is used to drive at least one clamping plate 130 to rotate, so that the multiple clamping plates 130 can jointly clamp or release the pole lug 21. The drive mechanism 200 is used to drive the first clamping plate 110 and the second clamping plate 120 to rotate. The first clamping plate 110 is capable of rotating about a first rotation axis L1, and the second clamping plate 120 is capable of rotating about a second rotation axis L2. The first rotation axis L1 and the second rotation axis L2 are arranged side by side. Alternatively, the drive mechanism 200 is in driving connection with the first clamping plate 110 and is used to drive the first clamping plate 110 to rotate about a predetermined rotation axis L3. The second clamping plate 120 is spaced apart from the predetermined rotation axis L3 and fixed relative to it. The driving mechanism 200 is used to drive the first clamping plate 110 and / or the second clamping plate 120 to rotate so that the relative position of the first clamping plate 110 and the second clamping plate 120 can be switched between a clamping position and a release position; in the clamping position, the first clamping plate 110 and the second clamping plate 120 at least partially overlap and abut against each other in the thickness direction F4 of the pole ear portion 21 to clamp both sides of the thickness direction F4 of the pole ear portion 21; in the release position, the abutment between the first clamping plate 110 and the second clamping plate 120 is cancelled to release the pole ear portion 21.The first clamping plate 110 is provided with a first avoidance gap 202, and the second clamping plate 120 is provided with a second avoidance gap 203; when in the release position, the first avoidance gap 202 and the second avoidance gap 203 are arranged opposite to each other, and there is a spacing space 204 between the first avoidance gap 202 and the second avoidance gap 203, and the first avoidance gap 202, the second avoidance gap 203 and the spacing space 204 are connected to each other to form an avoidance space 201. The first clamping plate 110 includes a first plate body 111 and a first rotating portion 112, the first rotating portion 112 protruding from a side edge of the first plate body 111 to form a first avoidance gap 202 between the first rotating portion 112 and the first plate body 111, and the driving mechanism 200 is transmission-connected to the first rotating portion 112 to drive the first rotating portion 112 to rotate around the first rotation axis L1; and / or, the second clamping plate 120 includes a second plate body 121 and a second rotating portion 122, the second rotating portion 122 protruding from a side edge of the second plate body 121 to form a second avoidance gap 203 between the second rotating portion 122 and the second plate body 121, and the driving mechanism 200 is transmission-connected to the second rotating portion 122 to drive the second rotating portion 122 to rotate around the second rotation axis L2. The first clamping plate 110 and the second clamping plate 120 rotate in the same direction; and / or the first rotation axis L1 and the second rotation axis L2 are parallel to each other; and / or the first rotation axis L1 and the second rotation axis L2 are arranged parallel to the axis of the through hole 14. The ratio of the width of the first clamping plate 110 in a direction F2 perpendicular to the first rotation axis L1 to the width of the second clamping plate 120 in a direction F3 perpendicular to the second rotation axis L2 is 0.5-2; and / or the length of the first clamping plate 110 along the first rotation axis L1 is the same as the length of the second clamping plate 120 along the second rotation axis L2. The first clamping plate 110 and the second clamping plate 120 are rotatably connected, and the first clamping plate 110 and the second clamping plate 120 are capable of relative rotation about the same predetermined rotation axis L3. The driving mechanism 200 is in driving connection with the first clamping plate 110 and / or the second clamping plate 120 to drive the first clamping plate 110 and / or the second clamping plate 120 to rotate about the predetermined rotation axis L3. The tab piercing device 2 includes a transmission mechanism 300. The drive mechanism 200 is in transmission connection with the transmission mechanism 300, and the transmission mechanism 300 is in transmission connection with the first clamping plate 110 and the second clamping plate 120. The transmission mechanism 300 includes a first transmission rod 310 that rotates about a first rotation axis L1 and a second transmission rod 320 that rotates about a second rotation axis L2. The first transmission rod 310 is connected to the first clamping plate 110, and the second transmission rod 320 is connected to the second clamping plate 120. The drive mechanism 200 is in transmission connection with the first transmission rod 310 and the second transmission rod 320, and is used to drive the first transmission rod 310 to rotate about the first rotation axis L1 and the second transmission rod 320 to rotate about the second rotation axis L2.The transmission mechanism 300 includes a connecting rod mechanism 330, which is in transmission connection with the first transmission rod 310 and the second transmission rod 320. The driving mechanism 200 is in transmission connection with the connecting rod mechanism 330. The driving mechanism 200 is used to drive the first transmission rod 310 and the second transmission rod 320 to rotate through the connecting rod mechanism 330. The connecting rod mechanism 330 includes a base 370, a first connecting rod 331, a second connecting rod 332, and a third connecting rod 333. The first connecting rod 331, the second connecting rod 332, and the third connecting rod 333 are arranged on one side of the base 370, and the third connecting rod 333 is respectively in transmission connection with the first connecting rod 331 and the second connecting rod 332. The driving mechanism 200 is used to drive the third connecting rod 333 to rotate. The first transmission rod 310 and the second transmission rod 320 are arranged on the other side of the base 370 and are respectively in transmission connection with the first connecting rod 331 and the second connecting rod 332. The transmission mechanism 300 includes an input shaft 340 and a coupling 350. The drive mechanism 200 has an output shaft 210. The input shaft 340 and the output shaft 210 are connected via the coupling 350. The input shaft 340 is in driving connection with the connecting rod mechanism 330. The transmission mechanism 300 includes a gear mechanism 360, which is in driving connection with the first transmission rod 310 and the second transmission rod 320. The drive mechanism 200 is in driving connection with the gear mechanism 360. The drive mechanism 200 is configured to drive the first transmission rod 310 and the second transmission rod 320 to rotate via the gear mechanism 360. The gear mechanism 360 includes a base 370, a main gear 363, a first slave gear 361, and a second slave gear 362. The main gear 363, the first slave gear 361, and the second slave gear 362 are arranged on one side of the base 370, and the first slave gear 361 and the second slave gear 362 are meshed with each other. The drive mechanism 200 is used to drive the first driving wheel to rotate. The first transmission rod 310 and the second transmission rod 320 are inserted into the base 370 from the other side and are respectively connected to the first slave gear 361 and the second slave gear 362. The transmission mechanism 300 includes an input shaft 340 and a coupling 350. The drive mechanism 200 has an output shaft 210. The input shaft 340 and the output shaft 210 are connected by the coupling 350. The input shaft 340 is connected to the gear mechanism 360. The piercing lug device 2 includes a flange seat 400. The drive mechanism 200 and the transmission mechanism 300 are connected by the flange seat 400. The process of inserting the housing 10 into the electrode assembly 20 includes a first stage, in which the clamping mechanism 100 is configured to move relative to the electrode assembly 20 together with the housing 10 to clamp the electrode lug 21 in the first stage. The process of inserting the housing 10 into the electrode assembly 20 includes a second stage located after the first stage, in which the clamping mechanism 100 is configured to move relative to the housing 10 in a direction away from each other and maintain the clamping of the electrode lug 21, thereby clamping the electrode lug 21 through the through hole 14 and extending out of the accommodating cavity 11.

[0210] According to some embodiments of the present application, as shown in FIG4 , the assembly device 3 includes the above-mentioned tab-piercing device 2. This arrangement allows the tab portion 21 to smoothly extend out of the housing 10, effectively reducing the difficulty of assembling the battery 1 and improving the assembly efficiency of the battery 1.

[0211] In summary, the embodiments of the present application can enable the tab portion 21 to smoothly extend out of the housing 10 , which can effectively reduce the difficulty of assembling the battery 1 and effectively improve the assembly efficiency of the battery 1 .

[0212] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery lug piercing device, wherein: The battery comprises a shell and an electrode assembly; the shell has a receiving cavity, a through hole connecting the receiving cavity and the outside is opened on the shell, the electrode assembly is arranged in the receiving cavity, and the electrode ear device is used to guide the electrode ear part of the electrode assembly to extend from the through hole; the electrode ear device comprises: A clamping mechanism, used for clamping the pole lug portion; A driving mechanism, drivingly connected to the clamping mechanism, and used to drive the clamping mechanism to move; Wherein, the driving mechanism is configured to drive the clamping mechanism to clamp the pole ear portion located in the accommodating cavity so as to extend out of the accommodating cavity through the through hole.

2. The electrode lug device according to claim 1, wherein: The clamping mechanism comprises a plurality of clamping plates, and the driving mechanism is in transmission connection with at least one of the plurality of clamping plates, and is used to drive at least one of the clamping plates to move; Furthermore, the driving mechanism is configured to drive the plurality of clamping plates to clamp the circumference of the pole ear portion so that the pole ear portion can extend out of the accommodating cavity, and is configured to enable the plurality of clamping plates to loosen the circumference of the pole ear portion so as to release the pole ear portion.

3. The electrode lug device according to claim 2, wherein: The plurality of clamping plates include a first clamping plate and a second clamping plate, and the driving mechanism is configured to be able to drive the first clamping plate and the second clamping plate to abut against and clamp both sides of the lug portion in a thickness direction.

4. The electrode lug device according to claim 3, wherein: The driving mechanism is used to drive at least one of the clamping plates to rotate, so that a plurality of the clamping plates can clamp or release the pole lug portion together.

5. The electrode lug device according to claim 4, wherein: The driving mechanism is used to drive the first clamping plate and the second clamping plate to rotate, the first clamping plate can rotate around a first rotation axis, and the second clamping plate can rotate around a second rotation axis; the first rotation axis and the second rotation axis are arranged side by side; or, The driving mechanism is transmission-connected to the first clamping plate and is used for driving the first clamping plate to rotate around a preset rotation axis. The second clamping plate is spaced apart from the preset rotation axis and relatively fixed.

6. The electrode lug device according to claim 5, wherein: The driving mechanism is used to drive the first clamping plate and / or the second clamping plate to rotate so that the relative position of the first clamping plate and the second clamping plate can be switched between a clamping position and a release position; in the clamping position, the first clamping plate and the second clamping plate at least partially overlap and abut against each other in the thickness direction of the pole ear portion to clamp the two sides of the thickness direction of the pole ear portion; in the release position, the abutment between the first clamping plate and the second clamping plate is cancelled to release the pole ear portion.

7. The electrode lug device according to claim 6, wherein: The first clamping plate is provided with a first avoidance gap, and the second clamping plate is provided with a second avoidance gap; in the release position, the first avoidance gap and the second avoidance gap are arranged opposite to each other, and there is a spacing space between the first avoidance gap and the second avoidance gap, and the first avoidance gap, the second avoidance gap and the spacing space are connected to each other to form an avoidance space.

8. The electrode lug device according to claim 7, wherein: The first clamping plate includes a first plate body and a first rotating part, the first rotating part is protrudingly arranged on a side edge of the first plate body to form the first avoidance gap between the first rotating part and the first plate body, and the driving mechanism is transmission-connected to the first rotating part to drive the first rotating part to rotate around the first rotation axis; and / or, The second clamping plate includes a second plate body and a second rotating part, the second rotating part is protruding from a side edge of the second plate body to form the second avoidance gap between the second rotating part and the second plate body, and the driving mechanism is transmission connected to the second rotating part to drive the second rotating part to rotate around the second rotation axis.

9. The electrode lug device according to claim 5, wherein: The first clamping plate and the second clamping plate have the same rotation direction; and / or, The first rotation axis and the second rotation axis are parallel to each other; and / or, The first rotation axis and the second rotation axis are arranged parallel to an axis of the through hole.

10. The electrode lug device according to claim 5, wherein: The ratio of the width of the first clamping plate in the direction perpendicular to the first rotation axis to the width of the second clamping plate in the direction perpendicular to the second rotation axis is 0.5 to 2; and / or, The length of the first clamping plate along the first rotation axis is the same as the length of the second clamping plate along the second rotation axis.

11. The electrode lug device according to claim 4, wherein: The first clamping plate and the second clamping plate are rotatably connected, and the first clamping plate and the second clamping plate can rotate relative to each other around the same preset rotation axis. The driving mechanism is transmission-connected to the first clamping plate and / or the second clamping plate to drive the first clamping plate and / or the second clamping plate to rotate around the preset rotation axis.

12. The electrode lug device according to claim 3, wherein: The electrode lug piercing device comprises a transmission mechanism, the driving mechanism is in transmission connection with the transmission mechanism, and the transmission mechanism is in transmission connection with the first clamping plate and the second clamping plate.

13. The electrode lug device according to claim 12, wherein: The transmission mechanism comprises a first transmission rod rotating around a first rotation axis and a second transmission rod rotating around a second rotation axis, the first transmission rod being connected to the first clamping plate, and the second transmission rod being connected to the second clamping plate; The driving mechanism is in driving connection with the first transmission rod and the second transmission rod, and is used for driving the first transmission rod to rotate around the first rotation axis and driving the second transmission rod to rotate around the second rotation axis.

14. The electrode lug device according to claim 13, wherein: The transmission mechanism includes a connecting rod mechanism, which is transmission-connected to the first transmission rod and the second transmission rod. The driving mechanism is transmission-connected to the connecting rod mechanism, and the driving mechanism is used to drive the first transmission rod and the second transmission rod to rotate through the connecting rod mechanism.

15. The electrode lug device according to claim 14, wherein: The connecting rod mechanism includes a base, a first connecting rod, a second connecting rod and a third connecting rod. The first connecting rod, the second connecting rod and the third connecting rod are arranged on one side of the base, and the third connecting rod is respectively connected to the first connecting rod and the second connecting rod in a transmission connection. The driving mechanism is used to drive the third connecting rod to rotate; the first transmission rod and the second transmission rod are passed through the base from the other side of the base, and are respectively connected to the first connecting rod and the second connecting rod in a transmission connection.

16. The electrode piercing lug device according to claim 15, wherein: The transmission mechanism comprises an input shaft and a coupling, the drive mechanism has an output shaft, the input shaft and the output shaft are connected via the coupling, and the input shaft is transmission-connected to the connecting rod mechanism.

17. The electrode lug device according to claim 13, wherein: The transmission mechanism includes a gear mechanism, which is transmission-connected to the first transmission rod and the second transmission rod. The drive mechanism is transmission-connected to the gear mechanism, and the drive mechanism is used to drive the first transmission rod and the second transmission rod to rotate through the gear mechanism.

18. The electrode lug device according to claim 17, wherein: The gear mechanism includes a base, a main gear, a first slave gear and a second slave gear. The main gear, the first slave gear and the second slave gear are arranged on one side of the base, and the first slave gear and the second slave gear are meshed with each other. The driving mechanism is used to drive the driving wheel to rotate; the first transmission rod and the second transmission rod are passed through the base from the other side of the base, and are respectively connected to the first slave gear and the second slave gear.

19. The electrode lug device according to claim 18, wherein: The transmission mechanism comprises an input shaft and a coupling, the drive mechanism has an output shaft, the input shaft and the output shaft are connected via the coupling, and the input shaft is transmission-connected to the gear mechanism.

20. The electrode lug device according to claim 12, wherein: The electrode ear device comprises a flange seat, and the driving mechanism and the transmission mechanism are connected via the flange seat.

21. The electrode lug device according to claim 1, wherein: The process of inserting the shell into the electrode assembly includes a first stage; in the first stage, the clamping mechanism is configured to be able to move relative to the electrode assembly together with the shell to clamp the electrode ear portion in the first stage.

22. The electrode lug device according to claim 21, wherein: The process of inserting the shell into the electrode assembly includes a second stage located after the first stage; in the second stage, the clamping mechanism is configured to be able to move relative to the shell in a direction away from each other and keep clamping the pole ear part, thereby clamping the pole ear part to extend through the through hole and out of the accommodating cavity.

23. A battery assembly device, wherein: include: A shell insertion device and a piercing ear device as claimed in any one of claims 1 to 22, wherein the shell insertion device is used to insert the electrode assembly into the shell from the open end of the shell; the shell insertion device comprises a shell fixing mechanism and a bearing assembly, the shell fixing mechanism is used to fix the shell, and the bearing assembly is used to bear the electrode assembly; Among them, the shell fixing mechanism and the pole ear device are arranged to be able to rise and fall relative to the bearing assembly so as to correspondingly move away from or close to the bearing assembly; the pole ear device is used to penetrate into the accommodating cavity through the through hole before clamping the pole ear part; the shell fixing mechanism is used to insert the shell into the electrode assembly; the driving mechanism is used to drive the clamping mechanism to clamp the pole ear part in the accommodating cavity, and drive the clamping mechanism to guide the pole ear part to pass through the through hole and extend out of the accommodating cavity.

24. A method for assembling a battery, wherein: The battery comprises a shell and an electrode assembly; the shell has a receiving cavity and a through hole connecting the receiving cavity and the outside, the electrode assembly is arranged in the receiving cavity, and the electrode ear of the electrode assembly extends out from the through hole; the assembly method comprises: Controlling the clamping mechanism to pass through the through hole and extend into the accommodating cavity, and controlling the shell to be inserted into the electrode assembly; During the process of inserting the shell into the electrode assembly, the driving mechanism is controlled to drive the clamping mechanism to clamp the pole ear portion in the accommodating cavity, and drive the clamping mechanism to guide the pole ear portion to pass through the through hole and extend out of the accommodating cavity.

25. The assembly method according to claim 24, wherein: The controlling the driving mechanism to drive the clamping mechanism to clamp the pole ear portion, and driving the clamping mechanism to guide the pole ear portion to extend out of the accommodating cavity through the through hole, comprises: In the first stage, the clamping mechanism and the shell are controlled to move together relative to the electrode assembly to clamp the electrode ear portion in the first stage; In the second stage, the clamping mechanism and the shell are controlled to move relative to each other in a direction away from each other and keep clamping the pole ear portion, so as to clamp the pole ear portion through the through hole and extend out of the accommodating cavity.

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