Battery insertion device, battery assembly method, and battery assembly system

Abstract

The present application discloses a battery insertion device, a battery assembly method, and a battery assembly system. The insertion device comprises a machine frame, a bearing mechanism, and an insertion mechanism; the bearing mechanism is arranged on the machine frame, and is used for bearing a bottom cover and an electrode assembly supported above the bottom cover; and the insertion mechanism is arranged on the machine frame, and comprises a case fixing mechanism and a tab part guide mechanism, the case fixing mechanism is used for fixing a case, and the tab part guide mechanism and the case fixing mechanism both can get close to or away from the bearing mechanism, wherein the case fixing mechanism is configured to sleeve the case onto the outer side of the electrode assembly by means of an open end when moving close to the bearing mechanism; and the tab part guide mechanism is configured to guide a tab part to penetrate out of an accommodating cavity through a through hole when the case is sleeved on the electrode assembly. According to the present application, by means of the mode, the tab part smoothly extends out of the case, thereby achieving the accurate insertion of the electrode assembly, reducing the battery preparation difficulty, and improving the assembly efficiency and the yield of batteries.

Description

Battery shell insertion device and assembly method and battery assembly system

[0001] This application claims priority to Chinese patent application No. 202311641516X, filed on November 30, 2023, entitled “Battery shell insertion device and assembly method and battery assembly system,” the entire contents of which are incorporated herein by reference.

Technical field

[0002] The present application relates to the field of battery technology, and in particular to a battery shell insertion device and assembly method, as well as a battery assembly system. [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 shell insertion device and assembly method as well as a battery assembly system, which can enable the pole ear to smoothly extend out of the shell to achieve precise shell insertion of the electrode assembly, reduce the difficulty of the battery preparation process, and thus improve the battery assembly efficiency and yield rate.

[0007] In a first aspect, the present application provides a battery housing insertion device, wherein the battery comprises a housing, a bottom cover, and an electrode assembly. The housing has an open end, and a terminal post is provided on a wall of the housing opposite the open end. The terminal post has a through hole, and the housing and the bottom cover are connected to form a receiving cavity connected to the through hole. The active material coating portion of the electrode assembly is disposed within the housing, and the electrode lug portion of the electrode assembly passes through the through hole and connects to the side of the terminal post facing away from the receiving cavity.

[0008] The shell insertion device includes a frame, a supporting mechanism, and a shell loading mechanism. The supporting mechanism is arranged on the frame and is used to support the bottom cover and the electrode assembly supported above the bottom cover. The shell loading mechanism is arranged on the frame and includes a shell fixing mechanism and a pole ear guide mechanism. The shell fixing mechanism is used to fix the shell. The pole ear guide mechanism and the shell fixing mechanism can both move closer to or further away from the supporting mechanism. The shell fixing mechanism is configured to be able to sleeve the shell through the open end onto the outside of the electrode assembly when moving closer to the supporting mechanism. The pole ear guide mechanism is configured to guide the pole ear to pass through the through hole and out of the accommodating cavity when the shell is sleeved on the electrode assembly.

[0009] In the technical solution of the embodiment of the present application, a shell-insertion device is provided with a shell fixing mechanism and a tab guiding mechanism. The shell fixing mechanism can insert the shell through the open end onto the outside of the electrode assembly. During the insertion of the shell into the electrode assembly, the tab guiding mechanism can guide the tab through the through-hole and out of the accommodating cavity. This design allows the tab of the battery to be smoothly guided through the through-hole and out of the accommodating cavity when the battery electrode assembly is inserted into the shell, making it less likely that the tab will block the insertion of the shell into the outside of the electrode assembly. This allows for precise insertion of the electrode assembly, reduces the difficulty of the battery manufacturing process, and improves the assembly efficiency and yield rate of the battery.

[0010] In some embodiments, the pole lug guiding mechanism and the housing fixing mechanism are both disposed above the supporting mechanism, and both can rise or fall relative to the supporting mechanism.

[0011] By arranging the pole ear guiding mechanism and the shell fixing mechanism to be able to rise or fall relative to the supporting mechanism, the pole ear guiding mechanism and the shell fixing mechanism can be conveniently close to the electrode assembly carried on the supporting mechanism, so that the shell fixing mechanism can more conveniently insert the shell into the outside of the electrode assembly, and can also enable the pole ear guiding mechanism to more effectively penetrate into the accommodating cavity to clamp the pole ear.

[0012] In some embodiments, the process of inserting the housing into the electrode assembly includes a first stage and a second stage, arranged in a sequential order. In the first stage, the housing fixing mechanism and the electrode tab guide mechanism are configured to descend together relative to the support mechanism, allowing the electrode tab guide mechanism to contact the electrode tab within the accommodating cavity. In the second stage, the housing fixing mechanism is configured to descend relative to the electrode tab guide mechanism, allowing the electrode tab guide mechanism to guide the electrode tab through the through hole and out of the accommodating cavity.

[0013] Through the above arrangement, after the pole ear guiding mechanism is able to contact the pole ear in the accommodating cavity in the first stage, the shell fixing mechanism further descends relative to the pole ear guiding mechanism, so that the pole ear guiding mechanism can be stationary relative to the pole ear in the second stage. At this time, when the shell fixing mechanism further drives the shell to descend, the pole ear guiding mechanism can guide the pole ear to penetrate into the through hole, so that the pole ear is not easy to contact the shell in the second stage and block the shell from being inserted into the electrode assembly or causing the pole ear to bend and deform, etc., which can improve the efficiency of the electrode assembly entering the shell, thereby improving the yield rate of the battery.

[0014] In some embodiments, before the first stage, the pole ear guiding mechanism is configured to be able to descend along a preset assembly direction relative to the shell fixing mechanism, and penetrate into the accommodating cavity through the through hole from one side of the shell, and descend relative to the supporting mechanism together with the shell fixing mechanism in the first stage.

[0015] By inserting the pole ear guide mechanism into the accommodating cavity before the shell is inserted into the electrode assembly, the pole ear guide mechanism can contact the pole ear in the accommodating cavity after the shell is inserted into the electrode assembly, so as to facilitate guiding the pole ear to penetrate the through hole, thereby improving the assembly efficiency of the battery.

[0016] In some embodiments, the shell fixing mechanism is slidably disposed on the frame so as to be able to rise or fall relative to the supporting mechanism, and the pole ear guiding mechanism is slidably connected to the shell fixing mechanism so as to be able to rise or fall relative to the supporting mechanism.

[0017] By arranging the pole ear guiding mechanism and the shell fixing mechanism to be slidably connected, the pole ear guiding mechanism and the shell fixing mechanism can be facilitated to move relative to each other, and the shell fixing mechanism and the pole ear guiding mechanism can have a floating function, thereby facilitating the shell fixing mechanism and the pole ear guiding mechanism to be relatively close to or away from the electrode assembly on the supporting mechanism, so as to facilitate the assembly of the shell and guide the pole ear to penetrate into the through hole, thereby improving the assembly efficiency of the battery.

[0018] In some embodiments, the shell loading mechanism includes a first lifting drive mechanism, the shell securing mechanism includes a first support frame and a fixed actuator, the first support frame is slidably mounted on the frame, the first lifting drive mechanism is mounted on the frame and is used to drive the first support frame to rise and fall relative to the frame, the fixed actuator is mounted on the first support frame and is used to secure the shell. The shell loading mechanism includes a second lifting drive mechanism, the pole lug guiding mechanism includes a second support frame and a guide actuator, the second support frame is slidably mounted on the first support frame, the second lifting drive mechanism is mounted on the first support frame and is used to drive the second support frame to rise and fall relative to the first support frame, the guide actuator is mounted on the second support frame and is used to contact and guide the pole lug.

[0019] By arranging the second support frame and the guiding actuator on the first support frame, when the first lifting drive mechanism drives the first support frame, the first support frame can simultaneously move the pole ear guiding mechanism and the fixed actuator for fixing the shell, and the second support frame can move relative to the first support frame and the fixed actuator under the drive of the second lifting drive mechanism, so that the guiding actuator and the fixed actuator can cooperate with each other to guide the pole ear to pass through the through hole when the electrode assembly is assembled into the shell, thereby improving the assembly efficiency of the battery.

[0020] In some embodiments, the housing assembly mechanism includes a guide and positioning mechanism slidably mounted on the housing frame to enable elevation relative to the housing frame. The housing securing mechanism is slidably connected to the guide and positioning mechanism to enable elevation relative to the guide and positioning mechanism. The guide and positioning mechanism is configured to position and align the housing and the electrode assembly before the housing is inserted into the electrode assembly, and is configured to guide relative movement between the electrode assembly and the housing when the housing is inserted into the electrode assembly.

[0021] By providing a guiding and positioning mechanism to position the shell and the electrode assembly, the electrode assembly can be aligned with the shell when inserted into the shell, thereby achieving accurate insertion of the electrode assembly into the shell, thereby improving the assembly efficiency of the battery.

[0022] In some embodiments, the housing loading mechanism includes a third lifting drive mechanism. The guiding and positioning mechanism includes a third support frame and a positioning actuator. The third support frame is slidably mounted on the frame. The third lifting drive mechanism is mounted on the frame and is configured to drive the third support frame to rise and fall relative to the frame. The positioning actuator is mounted on the third support frame. The positioning actuator is configured to position and align the housing and the electrode assembly, and to guide relative movement between the electrode assembly and the housing.

[0023] By arranging the positioning actuator on the third support frame and using the third lifting drive mechanism to drive the third support frame to drive the positioning actuator to move relative to the frame, the positioning actuator can be moved relative to the supporting mechanism on the frame. By separating the drive mechanism of the positioning actuator from the drive mechanism of the shell, the positioning actuator can be moved relative to the shell, thereby more effectively utilizing the positioning actuator to cooperate with the shell to position, align, and guide the shell and electrode assembly, thereby achieving precise insertion of the electrode assembly into the shell.

[0024] In some embodiments, the shell loading mechanism includes a guide and positioning mechanism disposed between the shell fixing mechanism and the supporting mechanism, and configured to position and align the shell and the electrode assembly before the shell is inserted into the electrode assembly.

[0025] By arranging the guiding and positioning mechanism between the shell fixing mechanism and the supporting mechanism to simultaneously position and align the shell and the electrode assembly, not only can the shell and the electrode assembly be positioned and guided at the moment the electrode assembly is inserted into the shell, thereby achieving accurate insertion of the electrode assembly into the shell, but also the components of the shell insertion device can be simplified, the cost of the shell insertion device can be reduced, and the assembly efficiency of the battery can be improved.

[0026] In some embodiments, the guiding and positioning mechanism is configured to guide the relative movement between the electrode assembly and the shell along a preset assembly direction during the process of inserting the shell into the electrode assembly.

[0027] By utilizing the guiding and positioning mechanism to guide the movement of the electrode assembly and the shell during the process of the shell being inserted into the electrode assembly, not only can the positions of the shell and the electrode assembly be less likely to shift during the process of the shell being inserted into the electrode assembly, but also the shell is less likely to interfere with each other during the process of inserting the electrode assembly, thereby more effectively achieving the precise insertion of the electrode assembly into the shell.

[0028] In some embodiments, the housing fixing mechanism and the guide positioning mechanism are configured to be movable relative to each other in a predetermined assembly direction, and the housing fixing mechanism is configured to be lowered relative to the guide positioning mechanism, allowing the guide positioning mechanism to position the housing. The housing fixing mechanism and the guide positioning mechanism are configured to be lowered together relative to the support mechanism after the guide positioning mechanism positions the housing, allowing the guide positioning mechanism to position the electrode assembly.

[0029] By using the guide positioning mechanism to position the shell fixing mechanism, the position of the shell can be relatively fixed, so that the subsequent electrode assembly is not likely to collide with the shell and cause the shell to shift when entering the shell. After the guide positioning mechanism positions the shell, it descends relative to the supporting mechanism, so that the guide positioning mechanism positions the electrode assembly to facilitate the electrode assembly to enter the shell, thereby making the process of the electrode assembly entering the shell more accurate, thereby improving the assembly efficiency of the battery.

[0030] In some embodiments, the guiding and positioning mechanism includes a positioning guide plate, which is located between the shell fixing mechanism and the supporting mechanism. The positioning guide plate is provided with a positioning hole that passes through along a preset assembly direction. The positioning hole is used to position and align the shell and the electrode assembly.

[0031] By using the positioning guide plate to position and align the shell and the electrode assembly, the positioning process can be made simpler and more convenient, thereby reducing the difficulty of battery preparation, simplifying the shell insertion device, and saving costs.

[0032] In some embodiments, the guiding and positioning mechanism includes a positioning drive mechanism, the positioning guide plate includes at least two guide plates, and the positioning drive mechanism is transmission-connected to the at least two guide plates so as to be able to drive the at least two guide plates to assemble or separate from each other in a direction perpendicular to a preset assembly direction, and the at least two guide plates are assembled to form a positioning hole.

[0033] Through the above-mentioned arrangement, the movement of the guide plates can be made more flexible, which facilitates the assembly of the guide plates to form positioning holes before the electrode assembly is put into the shell. After the electrode assembly is put into the shell, at least two guide plates can also be separated from each other in the vertical direction of the preset assembly direction, and are not easy to block the shell and the electrode assembly from moving in other directions, thereby facilitating the carrying mechanism to drive the electrode assembly and the shell to leave the shell entry station and enter other processing stations, so as to improve the overall assembly efficiency of the battery.

[0034] In some embodiments, the positioning drive mechanism is configured to drive the at least two guide plates to mate with each other when the housing fixing mechanism descends to a predetermined position relative to the guide positioning mechanism, so as to position the housing through the positioning hole. After mate-mate, the at least two guide plates can descend together with the housing fixing mechanism to position the electrode assembly through the positioning hole.

[0035] By driving at least two guide plates to mate with each other when the shell fixing mechanism descends to a preset position, the guide positioning mechanism can form a positioning hole between the shell fixing mechanism and the electrode assembly, so that the shell clamped by the shell fixing mechanism passes through the positioning hole before it descends and is inserted into the electrode assembly, so that the positioning hole can position the shell, and then the guide plate descends together with the shell to position the electrode assembly, thereby improving the efficiency of the electrode assembly entering the shell.

[0036] In some embodiments, each guide plate has a portion of a hole wall for enclosing the positioning hole, and the portion of the hole wall includes a first hole wall segment and a second hole wall segment connected along a preset assembly direction, and the connection between the first hole wall segment and the second hole wall segment forms a supporting edge. When the at least two guide plates are assembled together, their supporting edges are assembled together to form a supporting surface facing the shell fixing mechanism, and the supporting surface is used to abut the open end of the shell to enable positioning of the shell. The positioning hole is configured to allow the electrode assembly to pass through the positioning hole from the other side of the at least two guide plates away from the supporting surface to enable positioning of the electrode assembly.

[0037] By providing the supporting edge portion, it is possible to facilitate the guiding and positioning mechanism to position the shell, thereby improving the accuracy and efficiency of inserting the electrode assembly into the shell.

[0038] In some embodiments, the positioning drive mechanism is configured to drive at least two guide plates to separate from each other after the pole ear guide mechanism contacts the pole ear, so as to remove the stopper facing the open end of the support platform, so that the shell fixing mechanism can further insert the shell into the electrode assembly.

[0039] By configuring the positioning drive mechanism to drive the at least two guide plates apart after the lug guide mechanism contacts the lug, the positioning drive mechanism can still position the housing and electrode assembly while the lug guide mechanism contacts the lug, thereby relatively securing the housing and electrode assembly and facilitating contact of the lug guide mechanism with the lug. Furthermore, the configuration of the at least two guide plates being driven apart after the lug guide mechanism contacts the lug prevents the at least two guide plates from interfering with the housing fixing mechanism that holds the housing, thereby allowing the housing to be smoothly inserted into the electrode assembly, completing the electrode assembly insertion step.

[0040] In some embodiments, guide slopes are respectively provided on both sides of the positioning guide plate, and the guide slopes are arranged in a convergent shape toward the positioning hole to guide the opening end and the electrode assembly to move into the positioning hole.

[0041] By setting the guiding slope, the shell and the electrode assembly can be guided, which facilitates the shell electrode assembly to move into the positioning hole, so that the positioning guide plate can position and guide the shell and the electrode assembly.

[0042] In some embodiments, the support mechanism includes a support fixture and a fixture drive mechanism, wherein the support fixture is connected to the fixture drive mechanism. The support fixture is used to clamp the electrode assembly, and the fixture drive mechanism is used to drive the support fixture to switch between a clamped state and an unloaded state. The fixture drive mechanism is configured to drive the support fixture to switch to the unloaded state during the process of inserting the housing into the electrode assembly to avoid the housing fixing mechanism.

[0043] By using the supporting fixture to clamp the electrode assembly, the electrode assembly and the bottom cover can be fixed. When the electrode assembly and the electrode assembly are inserted into the housing, the electrode assembly is not likely to shift or even fall. In addition, the fixture drive mechanism is configured to drive the supporting fixture to an unloaded state during the process of inserting the housing into the electrode assembly. This can prevent the fixture drive mechanism from interfering with the housing, thereby preventing the housing drive mechanism from interfering with the housing, thereby allowing the housing to be inserted into the electrode assembly smoothly.

[0044] In some embodiments, the housing fixing mechanism is configured to clamp the housing, and the pole lug guiding mechanism is configured to clamp the pole lug, so as to clamp the pole lug and guide the pole lug to penetrate into the through hole.

[0045] By adopting the method of clamping the shell and the pole ear, the shell and the pole ear can be easily fixed, the battery assembly process can be made simpler, and the assembly equipment can be simplified.

[0046] In a second aspect, the present application provides a battery assembly system, which includes the shell insertion device as described above.

[0047] In some embodiments, the battery assembly system further includes a conveying device and an assembly device, wherein the conveying device is used to transport the structure to be assembled to each workstation of the assembly device. The workstation of the assembly device includes a shell insertion device and at least a terminal lug welding device, a terminal lug penetration device, a terminal column welding device, and a bottom cover welding device.

[0048] The electrode lug welding device is used to weld multiple lugs of the electrode assembly to form a lug. The shell insertion device is used to install the electrode assembly into the housing from the open end. The lug insertion device is used to clamp the lug through the through-hole when the electrode assembly is installed in the housing. The pole welding device is used to weld the pole lug that passes through the through-hole to the side of the pole facing away from the housing cavity. The bottom cover welding device is used to weld the bottom cover to the open end of the housing.

[0049] By providing a shell insertion device in the battery assembly system, the pole ear can be smoothly extended from the shell to achieve accurate shell insertion of the electrode assembly, reducing the difficulty of the battery preparation process, thereby improving the battery assembly efficiency and yield rate.

[0050] In a third aspect, the present application provides a method for assembling a battery, comprising a housing and an electrode assembly. The housing has an open end, and a terminal post is disposed on a wall of the housing opposite the open end. The terminal post has a through hole, and the housing and the bottom cover are connected to form a receiving cavity connected to the through hole. The active material coating portion of the electrode assembly is disposed within the housing, and the electrode lug portion of the electrode assembly passes through the through hole and connects to the side of the terminal post facing away from the receiving cavity.

[0051] The assembly method includes: fixing the shell and the electrode assembly respectively; controlling the shell to descend relative to the electrode assembly so that the shell is inserted into the electrode assembly through the open end during the descent process; and guiding the electrode ear to pass through the through hole and out of the accommodating cavity during the process of the shell being inserted into the electrode assembly.

[0052] During the process of inserting the shell into the electrode assembly, the shell insertion device can guide the pole ear to penetrate into the through hole, so that the pole ear is not easily blocked by the shell from inserting the electrode assembly, so as to achieve precise insertion of the electrode assembly into the shell, thereby improving the assembly efficiency and yield of the battery.

[0053] In some embodiments, before controlling the housing to descend along a preset direction relative to the electrode assembly, the method includes: penetrating into the accommodating cavity through the through hole from one side of the housing.

[0054] Guiding the pole ear portion to pass through the accommodating cavity from the through hole includes: contacting the pole ear portion during the process of inserting the shell into the electrode assembly, and guiding the pole ear portion to pass through the accommodating cavity from the through hole.

[0055] With this arrangement, before the housing is inserted into the electrode assembly, the housing insertion device can penetrate the housing cavity from one side of the housing through the through hole to prepare for clamping and guiding the electrode ear. During the process of inserting the housing into the electrode assembly, the housing insertion device contacts the electrode ear and guides the electrode ear out of the housing cavity through the through hole, thereby reducing contact between the electrode ear and the housing. This makes it less likely that the electrode ear will contact the housing in the second stage, thereby preventing the housing from being inserted into the electrode assembly or causing the electrode ear to bend and deform, thereby improving the efficiency of inserting the electrode assembly into the housing.

[0056] In some embodiments, during the process of inserting the shell into the electrode assembly, the pole ear portion is contacted and the pole ear portion is guided to pass through the through hole to exit the accommodating cavity, including: in a first stage, the pole ear portion is contacted in the accommodating cavity; in a second stage, the shell is controlled to descend relative to the pole ear portion, guiding the pole ear portion to pass through the through hole to exit the accommodating cavity.

[0057] Through the above-mentioned arrangement, after contacting the pole ear part in the accommodating cavity, the shell can descend along the preset assembly direction relative to the pole ear part guiding mechanism, thereby guiding the pole ear part to pass through the accommodating cavity from the through hole and completing the process of the electrode assembly entering the shell, thereby improving the efficiency of the electrode assembly entering the shell and improving the yield rate of the battery.

[0058] In some embodiments, the assembly method further includes: welding the pole lug portion and the pole post.

[0059] With the above arrangement, when assembling the battery, the pole ear of the electrode assembly and the pole on the shell are welded, which not only enables the pole ear and the pole to be electrically connected, but also ensures the reliability and stability of the connection between the pole ear and the pole.

[0060] In some embodiments, the battery further comprises a pole cover plate. The assembly method further comprises: welding the pole cover plate to the pole, so that the pole cover plate closes the through hole.

[0061] Through the above arrangement, a terminal cover is provided on the battery, and the terminal cover is used to cover the through-hole, so that the terminal cover and the terminal cooperate with each other to close the through-hole, which can make the storage chamber inside the battery shell a sealed environment, making it difficult for external impurities such as water droplets to enter the battery storage chamber through the through-hole, and also making it difficult for the material components in the storage chamber to leak out of the outside world through the through-hole. In addition, the arrangement of welding the terminal cover and the terminal can connect the terminal cover to the terminal lug through the terminal, so that the energy of the electrode assembly can be transmitted to the outside of the battery through the larger area of ​​the terminal and the terminal cover, thereby improving the charging and discharging efficiency of the battery.

[0062] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

Brief Description of the Drawings

[0063] 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:

[0064] FIG1 is a schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0065] FIG2 is a schematic structural diagram of a shell insertion device according to some embodiments of the present application;

[0066] FIG3 is a schematic structural diagram of a supporting mechanism in some embodiments of the present application;

[0067] FIG4 is a schematic structural diagram of a shell loading mechanism in some embodiments of the present application;

[0068] FIG5 is a front structural diagram of a shell loading mechanism according to some embodiments of the present application;

[0069] FIG6 is a schematic diagram of the exploded structure of a shell loading mechanism according to some embodiments of the present application;

[0070] FIG7 is a schematic structural diagram of a guide and positioning mechanism according to some embodiments of the present application;

[0071] FIG8 is an isometric enlarged schematic diagram of the Q region in the guide and positioning mechanism shown in FIG7 ;

[0072] FIG9 is a schematic cross-sectional view of the component positioning guide plate shown in FIG8 along the cutting line CC;

[0073] FIG10 is another schematic structural diagram of the supporting mechanism according to some embodiments of the present application;

[0074] FIG11 is a schematic flow chart of a battery assembly method according to some embodiments of the present application.

[0075] The reference numerals in the specific embodiments are as follows: vehicle 1000; battery 1, housing 10, electrode assembly 20, accommodating cavity 11, open end 12, top 13, through hole 14, pole ear portion 21, pole 15, bottom cover 30, pole cover plate 40; Shell insertion device 2, shell loading mechanism 200, carrying mechanism 300, shell fixing mechanism 210, pole ear guiding mechanism 220, frame 230, first lifting drive mechanism 240, first support frame 211, fixing actuator 212, second lifting drive mechanism 250, second support frame 221, guiding actuator 222, guide positioning mechanism 260, third lifting drive mechanism 270, third support frame 261, positioning actuator 262, positioning guide plate 263, positioning hole 264, positioning drive mechanism 265, guide plate 2631, first hole wall section 2632, second hole wall section 2633, supporting edge 2634, supporting platform 2635, guide slope 2636, conveyor line 310, carrying fixture 320, fixture driving mechanism 330. [Specific implementation method]

[0076] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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).

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] Based on the above considerations, the present application provides a battery shell insertion device and assembly method. The shell fixing mechanism enables the shell to be inserted into the electrode assembly through the open end during the descent process. During the process of inserting the shell into the electrode assembly, the tab guiding mechanism guides the tab into the through-hole. This design allows the tab to be guided through the through-hole when the battery's electrode assembly is inserted into the shell, making it less likely for the tab to block the shell from being inserted into the electrode assembly. This allows for precise insertion of the electrode assembly, thereby improving battery assembly efficiency and yield.

[0089] The following is an exemplary description of a battery.

[0090] As shown in Figure 1, battery 1 can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0091] In some embodiments, the battery 1 may include a housing 10, a bottom cover 30, and an electrode assembly 20. The battery 1 may also include other functional components.

[0092] In some embodiments, the housing 10 is used to encapsulate the electrode assembly 20 and components such as the electrolyte.

[0093] The housing 10 may have an open end 12. A post 15 may be disposed on a wall of the housing 10 opposite the open end 12. The post 15 may have a through-hole 14. The housing 10 and the bottom cover 30 may be connected to form a receiving cavity 11 that communicates with the through-hole 14. The active material coating portion of the electrode assembly 20 may be disposed within the housing 10. The tab portion 21 of the electrode assembly 20 passes through the through-hole 14 and is connected to the side of the post 15 facing away from the receiving cavity 11.

[0094] The bottom cover 30 covers the open end 12 of the housing 10 to isolate the internal environment of the battery 1 from the external environment. The shape of the bottom cover 30 can be adapted to the shape of the open end 12 to fit the housing 10. Optionally, the bottom cover 30 can be made of a material with a certain degree of hardness and strength (such as aluminum alloy). This makes the bottom cover 30 less likely to deform when subjected to compression or collision, thus providing the battery 1 with greater structural strength and improved safety.

[0095] In some embodiments, components such as terminals 15 may be provided on the top 13 of the housing 10. Terminals 15 may be used to electrically connect to the electrode assembly 20 for inputting or outputting electrical energy from or to the battery 1. In some embodiments, the housing 10 may also be provided with a pressure relief mechanism for relieving internal pressure when the internal pressure or temperature of the battery 1 reaches a threshold.

[0096] The housing 10 is a component used to cooperate with the bottom cover 30 to form the internal environment of the battery 1, wherein the formed internal environment can be used to accommodate the electrode assembly 20, electrolyte and other components. The housing 10 and the bottom cover 30 can be independent components. An open end 12 can be provided on the housing 10, and the internal environment of the battery 1 is formed by covering the open end 12 with the bottom cover 30 at the open end 12. In other embodiments, the shape of the housing 10 can be determined according to the specific shape and size of the electrode assembly 20. The material of the housing 10 can be various, for example, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0097] 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.

[0098] In some embodiments, the electrode assembly 20 is provided with a tab 21 that conducts current from the electrode assembly 20. The tab 21 includes 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 of the main body. During the battery's charge and discharge processes, the positive and negative active materials react with the electrolyte, and the tab 21 connects to the electrode post 15 to form a current loop.

[0099] In some embodiments, the electrode assembly 20 includes a positive electrode, a negative electrode, and a separator. During the battery's charge and discharge processes, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0100] 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.

[0101] 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.

[0102] 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.).

[0103] 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 NCM811 ), 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.

[0104] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0105] As an example, the negative electrode current collector can 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 can be used. The metal foam can be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can 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.).

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] In some embodiments, the electrode assembly 20 further includes a separator disposed between the positive electrode and the negative electrode.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] The liquid electrolyte includes an electrolyte salt and a solvent.

[0116] 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.

[0117] 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.

[0118] Among them, the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.

[0119] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0120] 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.

[0121] 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.

[0122] As an example, a composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0123] 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.

[0124] In some embodiments, the electrode assembly 20 and the housing 10 are assembled by the housing insertion device 2 to form the battery 1 .

[0125] With reference to FIG2 , the present application hereinafter exemplifies a shell insertion device 2 of a battery 1 , which can be used to insert the electrode assembly 20 into the shell 10 from the open end 12 .

[0126] As shown in FIG. 2 , the shell inserting device 2 may include a frame 230 , a shell loading mechanism 200 and a supporting mechanism 300 .

[0127] The supporting mechanism 300 may be disposed on the frame 230 to support the bottom cover 30 and the electrode assembly 20 supported on the bottom cover 30 .

[0128] The housing assembly 200 can be mounted on the frame 230 and can include a housing fixing mechanism 210 and a tab guide mechanism 220. The housing fixing mechanism 210 is used to fix the housing 10. Both the tab guide mechanism 220 and the housing fixing mechanism 210 can be moved closer to or further away from the supporting mechanism 300.

[0129] Alternatively, as shown in Figures 2 and 3, the electrode assembly 20 and the bottom cover 30 can be stacked and placed on the supporting mechanism 300 in a predetermined assembly direction, so that after the electrode assembly 20 is placed in the shell, the bottom cover 30 can cover the open end 12. The supporting mechanism 300 can also further secure the electrode assembly 20 and the bottom cover 30 to reduce the possibility of displacement of the electrode assembly 20 during transportation or placement in the shell.

[0130] 2 to 4 , the housing fixing mechanism 210 can be configured to sleeve the housing 10 onto the outside of the electrode assembly 20 via the open end 12 when the housing 10 moves toward the supporting mechanism 300. The electrode ear guiding mechanism 220 can be configured to guide the electrode ear 21 to pass through the through hole 14 and out of the accommodating cavity 11 when the housing 10 is sleeved onto the electrode assembly 20.

[0131] Through the above-mentioned arrangement, when the shell fixing mechanism 210 drives the shell 10 to be inserted into the electrode assembly 20, the pole ear guiding mechanism 220 can guide the pole ear 21 to pass through the accommodating cavity 11 from the through hole 14. This design enables the pole ear 21 of the battery 1 to be smoothly guided and pass through the accommodating cavity 11 from the through hole 14 when the electrode assembly 20 of the battery 1 is inserted into the shell, so that the pole ear 21 is not easy to block the shell 10 from being inserted into the electrode assembly 20, so as to achieve accurate insertion of the electrode assembly 20 into the shell, thereby improving the assembly efficiency and yield rate of the battery 1.

[0132] In some embodiments, as shown in FIG. 2 to FIG. 4 , the pole lug guiding mechanism 220 and the housing fixing mechanism 210 may both be disposed above the supporting mechanism 300 , and both may be able to rise or fall relative to the supporting mechanism 300 .

[0133] By arranging the pole ear guiding mechanism 220 and the shell fixing mechanism 210 above the supporting mechanism 300, it is possible to facilitate the assembly of the pole ear. Arranging them to be able to rise or fall relative to the supporting mechanism 300 can facilitate the pole ear guiding mechanism 220 and the shell fixing mechanism 210 to approach the electrode assembly 20 carried on the supporting mechanism 300, so that the shell fixing mechanism 210 can more conveniently insert the shell 10 into the outside of the electrode assembly 20, and can also enable the pole ear guiding mechanism 220 to more effectively penetrate into the accommodating cavity 11 to clamp the pole ear 21.

[0134] Of course, in other embodiments, the electrode tab guide mechanism 220 and the shell fixing mechanism 210 can be disposed at other positions of the supporting mechanism 300. For example, the electrode tab guide mechanism 220 and the shell fixing mechanism 210 can be disposed at the left or right side of the supporting mechanism 300, and the electrode tab guide mechanism 220 and the shell fixing mechanism 210 can move relative to the supporting mechanism 300 to approach or move away from the electrode assembly 20 on the supporting mechanism 300.

[0135] Optionally, the housing fixing mechanism 210 and the electrode tab guiding mechanism 220 are configured to be able to rise and fall relative to the support mechanism 300 along a preset assembly direction, correspondingly moving away from or closer to the support mechanism 300. During the descent process, the housing fixing mechanism 210 inserts the housing 10 into the electrode assembly 20 through the open end 12. During the insertion of the housing 10 into the electrode assembly 20, the electrode tab guiding mechanism 220 is configured to guide the electrode tab 21 through the through hole 14 and out of the accommodating cavity 11 as the housing 10 is inserted into the electrode assembly 20. The preset assembly direction is indicated by arrow A in FIG. 2 .

[0136] In some embodiments, the housing fixing mechanism 210 may be configured to clamp the housing 10 , and the pole lug guiding mechanism 220 may be configured to clamp the pole lug 21 , thereby clamping the pole lug 21 and guiding the pole lug 21 to pass through the accommodating cavity 11 from the through hole 14 .

[0137] Optionally, the shell fixing mechanism 210 can be configured to clamp the shell 10 above the supporting mechanism 300, so that the shell fixing mechanism 210 will not block the electrode assembly 20 from entering the shell, and will not easily block the pole ear portion 21 from penetrating into the through hole 14 at the top 13 of the shell 10, thereby facilitating the fixing of the shell 10 and the pole ear portion 21, and also making the assembly process of the battery 1 simpler and simplifying the assembly equipment.

[0138] In some embodiments, the process of inserting the housing 10 into the electrode assembly 20 may include a first stage and a second stage arranged in a sequential order.

[0139] In the first stage, the housing fixing mechanism 210 and the pole lug guiding mechanism 220 can be configured to be lowered together relative to the supporting mechanism 300, so that the pole lug guiding mechanism 220 can contact the pole lug 21 in the accommodating cavity 11. In the second stage, the housing fixing mechanism 210 can be configured to be lowered relative to the pole lug guiding mechanism 220, so that the pole lug guiding mechanism 220 guides the pole lug 21 to pass through the accommodating cavity 11 through the through hole 14.

[0140] Through the above-mentioned arrangement, after the pole ear guiding mechanism 220 contacts the pole ear 21, the shell fixing mechanism 210 further descends relative to the pole ear guiding mechanism 220, so that the pole ear guiding mechanism 220 can be stationary relative to the pole ear 21 in the second stage. At this time, when the shell fixing mechanism 210 further drives the shell 10 to descend, the pole ear guiding mechanism 220 can guide the pole ear 21 to pass through the accommodating cavity 11 from the through hole 14, so that the pole ear 21 is not easy to contact the shell 10 in the second stage and block the shell 10 from being inserted into the electrode assembly 20 or causing the pole ear 21 to bend and deform, etc., which can improve the efficiency of the electrode assembly 20 entering the shell, thereby improving the yield rate of the battery 1.

[0141] In some embodiments, before the first stage, the tab guide mechanism 220 can be configured to descend relative to the housing fixing mechanism 210 along a preset assembly direction, penetrate from one side of the housing 10 through the through hole 14 into the accommodating cavity 11, and descend relative to the supporting mechanism 300 along with the housing fixing mechanism 210 during the first stage. The preset assembly direction can be shown as direction A in FIG2 .

[0142] By inserting the pole ear guiding mechanism 220 into the accommodating cavity 11 before the shell 10 is inserted into the electrode assembly 20, the pole ear guiding mechanism 220 can contact the pole ear 21 in the accommodating cavity 11 after the shell 10 is inserted into the electrode assembly 20, so as to facilitate guiding the pole ear 21 to pass through the accommodating cavity 11 from the through hole 14, thereby improving the assembly efficiency of the battery 1.

[0143] In some embodiments, as shown in Figure 2, the shell fixing mechanism 210 can be slidably disposed on the frame 230 so as to be able to rise or fall relative to the supporting mechanism 300, and the pole ear guiding mechanism 220 can be slidably connected to the shell fixing mechanism 210 so as to be able to rise or fall relative to the shell fixing mechanism 210.

[0144] By setting up the ear guiding mechanism 220 to be slidably connected to the shell fixing mechanism 210, the pole ear guiding mechanism and the shell fixing mechanism can be facilitated to move relative to each other, and the shell fixing mechanism 210 and the pole ear guiding mechanism 220 can have a floating function, thereby facilitating the shell fixing mechanism 210 and the pole ear guiding mechanism 220 to be relatively close to or away from the electrode assembly 20 on the supporting mechanism 300, so as to facilitate the assembly of the shell 10 and guide the pole ear 21 to pass through the accommodating cavity 11 from the through hole 14, thereby improving the assembly efficiency of the battery 1.

[0145] In some embodiments, as shown in Figures 2 to 6, the shell loading mechanism 200 may include a first lifting drive mechanism 240, and the shell fixing mechanism 210 may include a first support frame 211 and a fixing actuator 212. The first support frame 211 is slidably disposed on the frame 230, the first lifting drive mechanism 240 is disposed on the frame 230 and is used to drive the first support frame 211 to rise and fall relative to the frame 230, and the fixing actuator 212 is disposed on the first support frame 211 and is used to fix the shell 10. The first lifting drive mechanism 240 may be, for example, a cylinder drive mechanism, or other devices such as an electric motor.

[0146] Optionally, the first lifting drive mechanism 240 can drive the first support frame 211 to rise and fall relative to the frame 230 along a preset assembly direction. Specifically, when the first lifting drive mechanism 240 drives the first support frame 211 to rise and fall relative to the frame 230, the first support frame 211 can drive the fixed actuator 212 that fixes and clamps the shell 10 to rise and fall relative to the frame 230, thereby enabling the fixed actuator 212 to rise and fall relative to the electrode assembly 20 on the supporting mechanism 300 in the preset assembly direction.

[0147] Optionally, as shown in Figures 2 to 6, the shell loading mechanism 200 may include a second lifting drive mechanism 250, and the pole lug guide mechanism 220 may include a second support frame 221 and a guide actuator 222. The second support frame 221 is slidably disposed on the first support frame 211. The second lifting drive mechanism 250 is disposed on the first support frame 211 and is used to drive the second support frame 221 to rise and fall relative to the first support frame 211. The guide actuator 222 is disposed on the second support frame 221 and is used to contact and guide the pole lug 21. The second lifting drive mechanism 250 may be, for example, a cylinder drive mechanism or other devices such as an electric motor.

[0148] Optionally, the second lifting drive mechanism 250 can drive the second support frame 221 to rise and fall relative to the frame 230 along a preset assembly direction. Specifically, when the first support frame 211 is driven by the first lifting mechanism to rise and fall relative to the frame 230, the first support frame 211 can drive the pole lug guide mechanism 220 to rise and fall relative to the frame 230, so that the pole lug guide mechanism 220 can approach the pole lug 21. The second lifting drive mechanism can drive the second support frame 221 to rise and fall relative to the first support frame 211 and the fixed actuator 212 on the first support frame 211, thereby allowing the guide actuator 222 to rise and fall relative to the fixed actuator 212, so that the guide actuator 222 can rise and fall relative to the fixed actuator 212, so that the guide actuator 222 can rise into the through hole 14 and into the accommodating cavity 11, ready to clamp the pole lug 21.

[0149] By arranging the second support frame 221 and the guiding actuator 222 on the first support frame 211, when the first lifting drive mechanism 240 drives the first support frame 211, the first support frame 211 can simultaneously move the pole ear guiding mechanism 220 and the fixed actuator 212 for fixing the shell 10, and the second support frame 221 can move relative to the first support frame 211 and the fixed actuator 212 under the drive of the second lifting drive mechanism 250, so that the guiding actuator 222 and the fixed actuator 212 can cooperate with each other to guide the pole ear 21 to pass through the accommodating cavity 11 from the through hole 14 when the electrode assembly 20 is assembled with the shell 10, thereby improving the assembly efficiency of the battery 1.

[0150] In some embodiments, as shown in FIG. 2 to FIG. 8 , the shell loading mechanism 200 may further include a guide positioning mechanism 260 . The guide positioning mechanism 260 may be slidably disposed on the frame 230 so as to be able to be raised and lowered relative to the frame 230 .

[0151] The housing fixing mechanism 210 is slidably connected to the guide and positioning mechanism 260 so as to be able to rise and fall relative to the guide and positioning mechanism 260. The guide and positioning mechanism 260 is used to position and align the housing 10 and the electrode assembly 20 before the housing 10 is inserted into the electrode assembly 20, and is configured to guide the relative movement between the electrode assembly 20 and the housing 10 when the housing 10 is inserted into the electrode assembly 20.

[0152] By providing a guide positioning mechanism 260 to position the shell 10 and the electrode assembly 20 , the electrode assembly 20 can be aligned with the shell 10 when inserted into the shell, thereby achieving accurate insertion of the electrode assembly 20 into the shell, thereby improving the assembly efficiency of the battery 1 .

[0153] In some embodiments, as shown in FIG2 , the shell loading mechanism 200 may include a third lifting drive mechanism 270. The guiding and positioning mechanism 260 includes a third support frame 261 and a positioning actuator 262. The third support frame 261 is slidably arranged on the frame 230. The third lifting drive mechanism 270 is arranged on the frame 230 and is used to drive the third support frame 261 to rise and fall relative to the frame 230. The positioning actuator 262 can be arranged on the third support frame 261. The positioning actuator 262 can be used to position and align the shell 10 and the electrode assembly 20, and to guide the relative movement of the electrode assembly 20 and the shell 10. The third lifting drive mechanism 270 can be, for example, a cylinder drive mechanism, or other devices such as an electric motor.

[0154] By setting the positioning actuator 262 on the third support frame 261 and using the third lifting drive mechanism 270 to drive the third support frame 261 to drive the positioning actuator 262 to rise and fall relative to the frame 230, the positioning actuator 262 can be raised and lowered relative to the supporting mechanism 300 on the frame 230, so that the positioning actuator 262 can position and guide the shell 10 according to the movement of the shell 10, and can also be restored relative to the electrode assembly 20 to prepare for the next guidance.

[0155] Separating the driving mechanism of the positioning actuator 262 from the driving mechanism of the shell 10 allows the positioning actuator 262 to move relative to the shell 10, thereby more effectively utilizing the positioning actuator 262 to cooperate with the shell 10 to position, align and guide the shell 10 and the electrode assembly 20, so as to achieve precise insertion of the electrode assembly 20 into the shell.

[0156] In some embodiments, the guide and positioning mechanism 260 may be disposed between the housing fixing mechanism 210 and the supporting mechanism 300. The guide and positioning mechanism 260 may be configured to position and align the housing 10 and the electrode assembly 20 before the housing 10 is inserted into the electrode assembly 20.

[0157] The guiding and positioning mechanism 260 is arranged between the shell fixing mechanism 210 and the supporting mechanism 300 to simultaneously position and align the shell 10 and the electrode assembly 20. This not only positions and guides the shell 10 and the electrode assembly 20 at the moment the electrode assembly 20 is inserted into the shell, thereby achieving accurate insertion of the electrode assembly 20 into the shell, but also simplifies the components of the shell insertion device 2 and improves the assembly efficiency of the battery 1.

[0158] In some embodiments, the guiding and positioning mechanism 260 may be configured to guide the relative movement of the electrode assembly 20 and the housing 10 along a preset assembly direction during the process of inserting the housing 10 into the electrode assembly 20 .

[0159] The guide positioning mechanism 260 is used to guide the relative movement of the electrode assembly 20 and the shell 10 along the preset assembly direction, so that the positions of the shell 10 and the electrode assembly 20 are not easily offset during the process of the shell 10 being inserted into the electrode assembly 20, and the shell 10 is not easily blocked or stuck during the process of being inserted into the electrode assembly 20, thereby more effectively achieving the precise insertion of the electrode assembly 20 into the shell.

[0160] In some embodiments, the shell fixing mechanism 210 and the guide positioning mechanism 260 can be configured to move relative to each other in a preset assembly direction, and the shell fixing mechanism 210 can be lowered relative to the guide positioning mechanism 260 so that the guide positioning mechanism 260 positions the shell 10.

[0161] The shell fixing mechanism 210 and the guide positioning mechanism 260 are configured to descend together relative to the supporting mechanism 300 after the guide positioning mechanism 260 positions the shell 10 , so that the guide positioning mechanism 260 positions the electrode assembly 20 .

[0162] Optionally, when the shell fixing mechanism 210 drives the shell 10 to descend relative to the guiding and positioning mechanism 260 and reaches the position of the guiding and positioning mechanism 260, the shell 10 can be guided and positioned by the guiding and positioning mechanism 260. The third lifting drive mechanism 270 can then drive the guiding and positioning mechanism 260 and the shell fixing mechanism 210 to descend relative to the supporting mechanism 300, so that the electrode assembly 20 is first positioned and guided by the guiding and positioning mechanism 260 before approaching the shell 10 and preparing to be inserted into the shell, so that the electrode assembly 20 can be positioned and aligned with the shell 10. Therefore, when the shell fixing mechanism 210 and the guiding and positioning mechanism 260 are further descended, the electrode assembly 20 can be accurately inserted into the shell, thereby improving the assembly efficiency of the battery 1.

[0163] In some embodiments, as shown in Figures 7 and 8, the guiding and positioning mechanism 260 may include a positioning guide plate 263, which may be located between the shell fixing mechanism 210 and the supporting mechanism 300. The positioning guide plate 263 may be provided with a positioning hole 264 that passes through a preset assembly direction. The positioning hole 264 can be used to position and align the shell 10 and the electrode assembly 20.

[0164] Optionally, the positioning guide plate 263 can be adapted to the shell 10, and the positioning hole 264 can be adapted to the shape of the electrode assembly 20, so that the shell 10 is positioned and guided by the positioning guide plate 263. The positioning hole 264 and the positioning guide plate 263 can guide the electrode assembly 20, so that when the electrode assembly 20 is inserted into the shell, the positioning guide plate 263 aligns the electrode assembly 20 with the shell 10.

[0165] Moreover, only using the positioning guide plate 263 to position and align the shell 10 and the electrode assembly 20 can make the positioning process simpler and more convenient, thereby reducing the difficulty of preparing the battery 1, simplifying the shell insertion device 2, and saving costs.

[0166] In some embodiments, as shown in FIG7 and FIG8 , the guide positioning mechanism 260 may include a positioning drive mechanism 265, and the positioning guide plate 263 may include at least two guide plates 2631. The positioning drive mechanism 265 is in transmission connection with the at least two guide plates 2631 to drive the at least two guide plates 2631 to mate with or separate from each other in a direction perpendicular to a preset assembly direction. The at least two guide plates 2631 are joined together to form a positioning hole 264. The positioning drive mechanism 265 may be, for example, a cylinder drive mechanism or other devices such as an electric motor.

[0167] Since the shell 10 fixing assembly drives the shell 10 to move relative to the electrode assembly 20 on the supporting mechanism 300 in the preset assembly direction, at least two guide plates 2631 are arranged to be able to be assembled or moved away from each other in the vertical direction of the preset assembly direction, so that at least two guide plates 2631 can avoid the shell 10 and the electrode assembly 20 during the movement, and are not easily blocked from colliding with the shell 10 or the electrode assembly 20.

[0168] Such a setting can make the movement of the guide plate 2631 more flexible, and it is convenient to assemble with each other to form the positioning hole 264 before the electrode assembly 20 is inserted into the shell. After the electrode assembly 20 is inserted into the shell, at least two guide plates 2631 can also be separated from each other in the vertical direction of the preset assembly direction, so that the supporting mechanism 300 can drive the electrode assembly 20 and the shell 10 to leave the shell insertion station and enter other processing stations, so as to improve the overall assembly efficiency of the battery 1.

[0169] In some embodiments, the positioning drive mechanism 265 can be configured to drive the at least two guide plates 2631 to mate with each other when the housing fixing mechanism 210 descends to a preset position relative to the guide positioning mechanism 260, so as to position the housing 10 through the positioning holes 264. After being mate with each other, the at least two guide plates 2631 can descend together with the housing fixing mechanism 210, so as to position the electrode assembly 20 through the positioning holes 264.

[0170] Optionally, the preset position can be set to before the shell fixing mechanism 210 drives the shell 10 to descend relative to the guide positioning mechanism 260 to the position corresponding to at least two guide plates 2631, so that before the shell fixing mechanism 210 drives the shell 10 to reach the position corresponding to at least two guide plates 2631, at least two guide plates 2631 can be spliced ​​together to form a positioning hole 264, and then when the shell fixing mechanism 210 drives the shell 10 to further descend, it can be positioned by at least two guide plates 2631 and the positioning hole 264, wherein the open end 12 of the shell 10 can be aligned with the positioning hole 264.

[0171] Furthermore, after the at least two guide plates 2631 position the housing 10 through the positioning holes 264, they can be lowered along the preset assembly direction along with the housing fixing mechanism 210 to approach the electrode assembly 20. The at least two guide plates 2631 then position the electrode assembly 20 through the positioning holes 264, so that the electrode assembly 20 can be aligned with the positioning holes 264 and the open end 12 of the housing 10. After the at least two guide plates 2631 and the housing fixing mechanism 210 are further lowered, the electrode assembly 20 can further pass through the positioning holes 264 and enter the accommodating cavity 11 of the housing 10 through the open end 12, thereby effectively achieving precise insertion of the electrode assembly 20 into the housing, thereby improving the assembly efficiency of the battery 1.

[0172] Optionally, as shown in FIG8 , the number of the at least two guide plates 2631 can be two, and the two guide plates 2631 can be aligned with each other or moved away from each other in a direction perpendicular to the preset assembly direction. The movement direction of the two guide plates 2631 can be as shown by arrow B in FIG8 .

[0173] When the two guide plates 2631 are assembled, they enclose the positioning hole 264. When the housing fixing mechanism 210 drives the housing 10 downward, it is guided by the two guide plates 2631, with the open end 12 of the housing 10 aligned with the electrode assembly 20. When the two guide plates 2631 are separated, they can move away from the housing 10, allowing the fixing actuator 212 to clamp the housing 10 and continue to insert it into the electrode assembly 20, completing the housing insertion process.

[0174] Using two guide plates 2631 to form the positioning hole 264 can simplify the shell insertion device 2 and reduce the cost of the shell insertion device 2. It also makes it easier for the positioning drive mechanism 265 to control and drive the two guide plates 2631 to form the positioning hole 264, or to separate from each other and away from the shell 10.

[0175] In some embodiments, as shown in Figures 8 and 9, each guide plate 2631 may have a partial hole wall for enclosing the positioning hole 264. The partial hole wall may include a first hole wall segment 2632 and a second hole wall segment 2633 connected along a preset assembly direction. The connection between the first hole wall segment 2632 and the second hole wall segment 2633 forms a supporting edge portion 2634. When at least two guide plates 2631 are assembled together, their supporting edges 2634 are assembled together to form a supporting platform 2635 facing the housing fixing mechanism 210. The supporting platform 2635 can be used to abut the open end 12 of the housing 10 to enable positioning of the housing 10.

[0176] A supporting edge portion 2634 is provided on a portion of the hole wall surrounding the positioning hole 264 to form a supporting surface 2635, so that the supporting surface 2635 can enclose the positioning hole 264, so that when the open end 12 of the shell 10 abuts against the supporting surface 2635, the open end 12 can be aligned with the positioning hole 264, so that the shell 10 is aligned with the electrode assembly 20 under the guide plate 2631.

[0177] Optionally, the positioning hole 264 can be configured to allow the electrode assembly 20 to pass through the positioning hole 264 from the other side of the at least two guide plates 2631 away from the supporting platform surface 2635, so as to position the electrode assembly 20.

[0178] Specifically, after the open end 12 of the shell 10 abuts the supporting surface 2635, at least two guide plates 2631 are driven by the positioning drive mechanism 265 to descend along the preset assembly direction along with the shell 10, and then the positioning hole 264 is close to the electrode assembly 20 away from the side of the shell 10. The electrode assembly 20 can be positioned and guided by the positioning hole 264 and pass through the positioning hole 264, thereby further penetrating into the accommodating cavity 11 of the shell 10 through the open end 12, thereby improving the accuracy and efficiency of the electrode assembly 20 entering the shell.

[0179] In some embodiments, the positioning drive mechanism 265 can be configured to drive at least two guide plates 2631 to separate from each other after the pole ear guide mechanism 220 contacts the pole ear 21, so as to remove the stop of the supporting platform 2635 on the open end 12, so that the shell fixing mechanism 210 can further insert the shell 10 into the electrode assembly 20.

[0180] Optionally, when the pole ear guiding mechanism 220 contacts the pole ear 21, the shell 10 has not yet been fully inserted into the electrode assembly 20. After the pole ear guiding mechanism 220 contacts the pole ear 21, the shell 10 will further move along the preset assembly direction toward the electrode assembly 20 under the drive of the first lifting drive mechanism 240 to further fully insert the electrode assembly 20. During this process, at least two guide plates 2631 will not only stop the open end 12, but also cause mutual stoppage with the supporting mechanism 300 that clamps and fixes the electrode assembly 20. Therefore, the setting of separating the at least two guide plates 2631 from each other after driving can enable the shell 10 to be smoothly inserted into the electrode assembly 20 to complete the step of inserting the electrode assembly 20 into the shell.

[0181] In some embodiments, as shown in FIG. 9 , guide slopes 2636 may be provided on both sides of the positioning guide plate 263 , and the guide slopes 2636 are arranged in a convergent shape toward the positioning hole 264 to guide the opening end 12 and the electrode assembly 20 to move into the positioning hole 264 .

[0182] Specifically, the positioning guide plate 263 is respectively provided with a guide slope 2636 on the side facing the shell 10 and the side facing the supporting mechanism 300 in the preset assembly direction. The guide slopes 2636 on both sides can surround the positioning hole 264 and be connected to part of the hole wall of the positioning hole 264. The extension direction of the guide slope 2636 is set at an acute angle to the preset assembly direction, so that the guide slope 2636 is set in a convergent shape in the direction close to the positioning hole 264.

[0183] In the process of the shell 10 approaching and contacting at least two guide plates 2631, if the original position of the shell 10 is accurate, the open end 12 of the shell 10 can directly abut against the supporting surface 2635. If the position of the shell 10 is offset and not aligned with the supporting surface 2635, after contacting at least two guide plates 2631, it can be guided by the guide slope 2636 to position the guide shell 10, so that the shell 10 moves to align with the supporting surface 2635 and the positioning hole 264.

[0184] The electrode assembly 20 is also positioned and aligned with the positioning hole 264 by the guide slope 2636 on the other side of the guide plate 2631, so as to facilitate the movement of the electrode assembly 20 into the positioning hole 264 to complete the shell insertion step of the electrode assembly 20.

[0185] In some embodiments, as shown in FIG. 10 , the carrying mechanism 300 may include a carrying fixture 320 and a fixture driving mechanism 330 , and the fixture driving mechanism 330 is connected to the carrying fixture 320 .

[0186] The carrier clamp 320 can be used to clamp the electrode assembly 20, and the clamp drive mechanism 330 can be used to drive the carrier clamp 320 to switch between a clamped state and an unloaded state. The clamp drive mechanism 330 is configured to drive the carrier clamp 320 to switch to the unloaded state during the process of inserting the housing 10 into the electrode assembly 20, thereby avoiding the housing fixing mechanism 210.

[0187] Furthermore, the carrier fixture 320 can also clamp the bottom cover 30, so that the electrode assembly 20 and the bottom cover 30 can be relatively fixed after being stacked. When conveying the carrier fixture 320, the conveyor line 310 can simultaneously drive the electrode assembly 20 and the bottom cover 30 clamped by the carrier mechanism 300 to be conveyed, thereby preventing the electrode assembly 20 and the bottom cover 30 from shifting or even falling during the conveyor line 310 conveying the electrode assembly 20 and the bottom cover 30.

[0188] Moreover, the clamp driving mechanism 330 is configured to drive the supporting clamp 320 to an unloading state during the process of inserting the shell 10 into the electrode assembly 20, so that the clamp driving mechanism 330 is not easily blocked by the shell 10, and the shell 10 can be smoothly inserted into the electrode assembly 20. The open end 12 of the shell 10 can abut against the bottom cover 30 to complete the step of inserting the electrode assembly 20 into the shell.

[0189] Optionally, the clamp driving mechanism 330 is configured to drive the supporting clamp 320 to switch to an unloading state after the tab guide mechanism 220 contacts the tab 21 and while the housing 10 is further inserted into the electrode assembly 20. This configuration allows the supporting clamp 320 to continue to clamp the electrode assembly 20 while the tab guide mechanism 220 contacts the tab 21, thereby further securing the electrode assembly 20 and preventing the tab guide mechanism 220 from colliding with the electrode assembly 20 and causing displacement of the electrode assembly 20.

[0190] Based on the basic structure of the battery 1 and the shell insertion device 2 of the battery 1 described above, the following is an exemplary description of the battery assembly system according to an embodiment of the battery assembly system.

[0191] The battery assembly system may include the shell insertion device 2 described above. The battery assembly system may also include conveying equipment and assembly equipment. The conveying equipment may be used to transport the structure to be assembled and the support mechanism 300 to various workstations of the assembly equipment. The workstations of the assembly equipment may include at least a tab welding device, a tab insertion device, a pole welding device, and a bottom cap welding device.

[0192] It should be noted that, in this embodiment, the conveying equipment may include a conveyor line 310. The conveyor line 310 can be a conveying structure formed by a motor-driven conveyor roller and a conveyor belt, or a conveying structure formed by a motor-driven conveyor chain link, or an AGV conveyor cart, which can realize conveying in at least one direction and can support and ensure the stability of the structure to be assembled.

[0193] Optionally, the carrier fixture 320 can be installed on a conveyor line 310 of a conveying device, and the conveyor line 310 can be used to transport the carrier fixture 320. The fixture drive mechanism 330 can also be installed on the conveyor line 310. The carrier mechanism 300 is used to support the structure of the battery 1 to be assembled. The conveyor line 310 can be connected to the carrier mechanism 300, and the conveyor line 310 can transport the structure of the battery to be assembled and the carrier mechanism 300 together.

[0194] Among them, the pole ear welding device can be used to weld multiple pole ear sheets of the electrode assembly 20 to form the pole ear portion 21. The shell insertion device 2 is used to install the electrode assembly 20 into the housing 10 from the open end 12. The pole ear penetration device is used to clamp the pole ear portion 21 through the through hole 14 when the electrode assembly 20 is installed in the housing 10. The pole column welding device is used to weld the pole ear portion 21 passing through the through hole 14 to the side of the pole 15 facing away from the accommodating cavity 11. The bottom cover welding device is used to weld the bottom cover 30 to the open end 12 of the housing 10.

[0195] Specifically, the purpose of the pole ear welding device can be to form the pole ear 21 after pre-welding the pole ear sheet, and it can be an ultrasonic welding device, which can ensure that the pole ear sheet is welded in a clamped and stable state. The shell entry device can be a pushing mechanism or a clamping mechanism, which can stably move the electrode assembly 20 toward the open end 12 of the shell 10 and enter the accommodating cavity 11 through the open end 12. Similarly, the pole ear penetration device can adopt a clamping structure or a guiding structure, which can guide the pole ear 21 to smoothly pass through the through hole 14 without interfering with the shell 10. The pole column welding device aims to achieve welding of the pole ear 21 and the pole 15, and it can be a laser welding device. The bottom cover welding device aims to achieve welding of the circumferential edges of the bottom cover 30 and the open end 12 of the shell 10, and is also a laser welding device.

[0196] In addition, the assembly equipment is not limited to including a pole ear welding device, a shell insertion device, a pole ear penetration device, a pole column welding device, and a bottom cover welding device. For example, when the number of electrode assemblies 20 is multiple, for example, two, the assembly equipment may further include a matching device, which may be used to stack multiple electrode assemblies 20 so that the pole ears 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 pole ear welding device for welding the pole ears, thereby facilitating the formation of the pole ear 21. For example, in order to ensure the reliability of the battery 1 assembly process, dust removal, NG detection stations, etc. may also be added between any two adjacent stations, which is not limited in this embodiment.

[0197] Taking the above-mentioned embodiment of the battery 1 and the housing insertion device 2 of the battery 1 as an example, the following exemplarily describes the assembly method of the battery 1. As shown in FIG11 , the assembly method includes the following steps:

[0198] S100: Fix the housing and the electrode assembly separately.

[0199] Alternatively, the bottom cover 30 can be placed on the carrier mechanism 300 first, and then the electrode assembly 20 can be placed on the bottom cover 30, so that the electrode assembly 20 and the bottom cover 30 are stacked in sequence in a predetermined assembly direction, with the electrode lug 21 of the electrode assembly 20 facing away from the bottom cover 30. Furthermore, the carrier fixture 320 clamps and secures the electrode assembly 20 and the bottom cover 30, and the conveyor line 310 further conveys the carrier fixture 320, the electrode assembly 20, and the bottom cover 30 to the corresponding shell insertion station of the shell loading mechanism 200.

[0200] The shell loading mechanism 200 can drive the fixing actuator 212 on the first support frame 211 through the first lifting drive mechanism 240 to fix the shell 10, and make the open end 12 of the shell 10 face the electrode assembly 20 on the supporting mechanism 300 in a preset assembly direction.

[0201] S200: Control the housing to descend relative to the supporting mechanism, so that the housing is inserted into the electrode assembly through the open end during the descending process.

[0202] In some embodiments, before the control housing 10 is lowered relative to the supporting mechanism 300 , the following steps are included: penetrating into the accommodating cavity 11 from one side of the housing 10 through the through hole 14 to clamp the pole lug portion 21 .

[0203] In some embodiments, the second support frame 221 of the pole ear guiding mechanism 220 is first driven by the second lifting drive mechanism 250 to descend along a preset assembly direction relative to the first support frame 211, so that the guiding actuator 222 arranged on the second support frame 221 can descend relative to the fixed actuator 212 on the first support frame 211, thereby allowing the guiding actuator 222 of the pole ear guiding mechanism 220 to penetrate into the accommodating cavity 11 through the through hole 14 from one side of the shell 10, in preparation for guiding the pole ear 21 to penetrate into the through hole 14.

[0204] Furthermore, in some embodiments, the first lifting drive mechanism 240 drives and controls the housing fixing mechanism 210 and the pole ear guiding mechanism 220 to descend along a preset assembly direction relative to the supporting mechanism 300, so as to drive the housing 10 to move along the preset assembly direction toward the supporting mechanism 300.

[0205] Then, when the housing fixing mechanism 210 descends to a predetermined position relative to the guide and positioning mechanism 260, the positioning drive mechanism 265 drives the at least two guide plates 2631 to mate with each other to form the positioning hole 264. As the housing 10 further descends, its open end 12 abuts against the at least two guide plates 2631 of the guide and positioning mechanism 260. The guide slopes 2636 on the at least two guide plates 2631 position and guide the housing 10 assembly, so that the open end 12 of the housing 10 abuts against the support surface 2635 to align with the positioning hole 264, and surrounds the positioning hole 264 on the side of the positioning hole 264 facing the housing 10.

[0206] Then, in some embodiments, the positioning drive mechanism 265 drives the guide positioning mechanism 260, the shell fixing mechanism 210, and the shell 10 to descend along a preset assembly direction to approach the electrode assembly 20. Similarly, during the descending process, the guiding inclined surface 2636 on the side of the positioning guide plate 263 facing away from the shell 10 guides the electrode assembly 20, so that the electrode assembly 20 can pass through the positioning hole 264 from the other side of the positioning hole 264 facing away from the shell fixing mechanism 210, and further pass through the open end 12 and into the accommodating cavity 11, thereby achieving accurate insertion of the electrode assembly 20 into the shell.

[0207] S300: When the shell is inserted into the electrode assembly, the electrode ear is guided to pass through the through hole and out of the accommodation cavity.

[0208] In some embodiments, when the housing 10 is inserted into the electrode assembly 20, the housing 10 contacts the electrode ear 21 and guides the electrode ear 21 to pass through the through hole 14 and out of the accommodating cavity 11. Optionally, this step may include the following steps S311-S312:

[0209] S311: In the first stage, contact the pole ear portion in the accommodation cavity.

[0210] Optionally, during the process of inserting the shell 10 into the electrode assembly 20 , when the pole ear guide mechanism 220 moves relatively to the position of contacting the pole ear 21 , the shell fixing mechanism 210 and the pole ear guide mechanism 220 stop descending, and the pole ear guide mechanism 220 moves to contact and clamp the pole ear 21 .

[0211] In some embodiments, after the pole ear guiding mechanism 220 moves to contact and clamp the pole ear 21, the positioning drive mechanism 265 drives at least two guide plates 2631 to separate from each other in a direction perpendicular to the preset assembly direction to move away from the shell 10, so as to remove the support surface 2635 from the stop of the open end 12, so that the shell fixing mechanism 210 can further insert the shell 10 into the electrode assembly 20.

[0212] Optionally, after the pole ear guiding mechanism 220 moves to contact and clamp the pole ear 21, the clamp driving mechanism 330 can drive the supporting clamp 320 to switch to an unloading state, so that the supporting clamp 320 is away from the electrode assembly 20 and the bottom cover 30, avoiding the shell 10 to drive the fixing mechanism and the shell 10, so that the subsequent shell 10 can be completely inserted into the electrode assembly 20, and its open end 12 can smoothly support the bottom cover 30.

[0213] S312: In the second stage, the control housing is lowered relative to the pole lug portion, so that the pole lug portion guiding mechanism guides the pole lug portion to pass through the accommodating cavity through the through hole.

[0214] Optionally, the first lifting drive mechanism 240 drives the first support frame 211 to drive the shell fixing mechanism 210 to descend along a preset assembly direction relative to the pole ear guide mechanism 220 and the pole ear 21, so that the shell 10 can descend along the preset assembly direction relative to the pole ear guide mechanism 220 and the pole ear 21, so that the pole ear guide mechanism 220 guides the pole ear 21 to pass through the accommodating cavity 11 from the through hole 14, and the shell 10 is smoothly inserted into the electrode assembly 20, and its open end 12 can smoothly support the bottom cover 30 to complete the shell entry process of the electrode assembly 20.

[0215] Through the above-mentioned arrangement, after the pole ear guiding mechanism 220 is able to contact the pole ear 21 in the accommodating cavity 11, the shell fixing mechanism 210 further descends along the preset assembly direction relative to the pole ear guiding mechanism 220, so that the pole ear guiding mechanism 220 can be stationary relative to the pole ear 21 in the second stage. At this time, when the shell fixing mechanism 210 further drives the shell 10 to descend along the preset assembly direction, the pole ear guiding mechanism 220 can guide the pole ear 21 to pass through the accommodating cavity 11 from the through hole 14, so that the pole ear 21 is not easy to contact the shell 10 in the second stage and block the shell 10 from being inserted into the electrode assembly 20 or causing the pole ear 21 to bend and deform, etc., which can improve the efficiency of the electrode assembly 20 entering the shell, thereby improving the yield rate of the battery 1.

[0216] In some embodiments, the assembly method further includes step S400:

[0217] S400: Welding of the pole lugs and poles.

[0218] Optionally, after successfully inserting the shell 10 into the outside of the electrode assembly 20, the pole ear portion 21 passes through the accommodating cavity 11 from the through hole and is opposite to the pole 15 in the through hole 14. At this time, the pole ear portion 21 and the pole 15 are welded so that the pole ear portion 21 and the pole 15 are conductively connected, and can form a current loop together with the electrode assembly 20, so that the electrode assembly 20 can be connected to the outside world through the pole 15 and the pole ear portion 21, and realize the charging and discharging function.

[0219] Furthermore, welding the pole ear portion 21 of the electrode assembly 20 and the pole post 15 on the housing 10 can ensure the reliability and stability of the connection between the pole ear portion 21 and the pole post 15 .

[0220] In some embodiments, as shown in FIG1 , the battery 1 may further include a terminal cover 40. The assembly method further includes step S500:

[0221] S500: Welding the pole cover to the pole so that the pole cover closes the through hole.

[0222] Optionally, after the terminal lug 21 is welded to the terminal post 15, a terminal post cover 40 may be provided on the side of the terminal post 15 away from the housing 10, and the terminal post cover 40 and the terminal post 15 may be welded together so that the terminal post cover 40 can close the through-hole 14 and, together with the housing 10, enclose the accommodating cavity 11 to form a sealed space. This arrangement prevents foreign matter, such as water droplets, from entering the accommodating cavity 11 of the battery through the through-hole 14, and also prevents material components in the accommodating cavity 11 from leaking out through the through-hole 14.

[0223] Moreover, the arrangement of welding the pole cover 40 and the pole 15 allows the pole cover 40 to be connected to the pole ear 21 through the pole 15, so that the energy of the electrode assembly 20 can be transmitted to the outside of the battery 1 through the pole 15 and the pole cover 40 with a larger area, thereby improving the charging and discharging efficiency of the battery 1.

[0224] In a first aspect, as shown in Figures 1 to 10, the present application provides a battery housing insertion device 2 for a battery 1, wherein the housing 10 may have an open end 12, and a terminal post 15 may be provided on the wall of the housing 10 opposite the open end 12. The terminal post 15 may have a through-hole 14. The housing 10 and the bottom cover 30 may be connected to form a receiving cavity 11 that communicates with the through-hole 14. The active material coating portion of the electrode assembly 20 may be disposed within the housing 10, and the tab portion 21 of the electrode assembly 20 may pass through the through-hole 14 and connect to the side of the terminal post 15 facing away from the receiving cavity 11. The housing insertion device 2 includes a frame 230, a housing loading mechanism 200, and a supporting mechanism 300. The supporting mechanism 300 may be disposed on the frame 230 to support the bottom cover 30 and the electrode assembly 20 supported above the bottom cover 30. The housing loading mechanism 200 may be disposed on the frame 230 and may include a housing fixing mechanism 210 and a tab guiding mechanism 220. The housing fixing mechanism 210 is used to fix the housing 10. The pole ear guide mechanism 220 and the housing fixing mechanism 210 can both move closer to or further away from the supporting mechanism 300. Specifically, the housing fixing mechanism 210 can be configured to sleeve the housing 10 onto the outside of the electrode assembly 20 via the open end 12 when moving closer to the supporting mechanism 300. The pole ear guide mechanism 220 can be configured to guide the pole ear 21 to pass through the through hole 14 and out of the accommodating cavity 11 when the housing 10 is sleeved onto the electrode assembly 20.

[0225] The pole lug guiding mechanism 220 and the housing fixing mechanism 210 can both be disposed above the supporting mechanism 300 , and both can rise or fall relative to the supporting mechanism 300 .

[0226] The process of inserting the housing 10 into the electrode assembly 20 may include a first stage and a second stage, which are arranged in a sequential order. In the first stage, the housing fixing mechanism 210 and the pole lug guide mechanism 220 can be configured to descend together relative to the supporting mechanism 300, so that the pole lug guide mechanism 220 can contact the pole lug 21 within the accommodating cavity 11. In the second stage, the housing fixing mechanism 210 can be configured to descend relative to the pole lug guide mechanism 220, so that the pole lug guide mechanism 220 guides the pole lug 21 to pass through the accommodating cavity 11 through the through hole 14. Prior to the first stage, the pole lug guide mechanism 220 can be configured to descend relative to the housing fixing mechanism 210 along a preset assembly direction, and pass through the through hole 14 from one side of the housing 10 into the accommodating cavity 11, and descend relative to the supporting mechanism 300 along with the housing fixing mechanism 210 in the first stage.

[0227] The housing fixing mechanism 210 is slidably mounted on the frame 230 so as to be able to rise or fall relative to the frame 230. The pole lug guide mechanism 220 is slidably connected to the housing fixing mechanism 210 so as to be able to rise or fall relative to the housing fixing mechanism 210. The shell loading mechanism 200 includes a first lifting drive mechanism 240. The housing fixing mechanism 210 includes a first support frame 211 and a fixed actuator 212. The first support frame 211 is slidably mounted on the frame 230. The first lifting drive mechanism 240 is mounted on the frame 230 for driving the first support frame 211 to rise and fall relative to the frame 230. The fixed actuator 212 is mounted on the first support frame 211 and is used to fix the housing 10. The shell loading mechanism 200 includes a second lifting drive mechanism 250, and the pole ear guiding mechanism 220 includes a second support frame 221 and a guiding actuator 222. The second support frame 221 is slidably arranged on the first support frame 211. The second lifting drive mechanism 250 is arranged on the first support frame 211, and is used to drive the second support frame 221 to rise and fall relative to the first support frame 211. The guiding actuator 222 is arranged on the second support frame 221, and the guiding actuator 222 is used to contact and guide the pole ear 21.

[0228] The shell loading mechanism 200 includes a guide and positioning mechanism 260, which is slidably mounted on the frame 230 so as to be able to be raised and lowered relative to the frame 230. The shell fixing mechanism 210 is slidably connected to the guide and positioning mechanism 260 so as to be able to be raised and lowered relative to the guide and positioning mechanism 260. The guide and positioning mechanism 260 is used to position and align the shell 10 and the electrode assembly 20 before the shell 10 is inserted into the electrode assembly 20, and is configured to guide the relative movement between the electrode assembly 20 and the shell 10 when the shell 10 is inserted into the electrode assembly 20. The shell loading mechanism 200 includes a third lifting drive mechanism 270. The guide and positioning mechanism 260 includes a third support frame 261 and a positioning actuator 262. The third support frame 261 is slidably mounted on the frame 230. The third lifting drive mechanism 270 is mounted on the frame 230 and is used to drive the third support frame 261 to rise and fall relative to the frame 230. The positioning actuator 262 is mounted on the third support frame 261. The positioning actuator 262 is used to position and align the housing 10 and the electrode assembly 20 , and to guide the relative movement between the electrode assembly 20 and the housing 10 .

[0229] The shell loading mechanism 200 includes a guide and positioning mechanism 260, which is arranged between the shell fixing mechanism 210 and the supporting mechanism 300. The guide and positioning mechanism 260 is configured to position and align the shell 10 and the electrode assembly 20 before the shell 10 is inserted into the electrode assembly 20. The guide and positioning mechanism 260 is configured to guide the relative movement of the electrode assembly 20 and the shell 10 along a preset assembly direction during the process of inserting the shell 10 into the electrode assembly 20. The shell fixing mechanism 210 and the guide and positioning mechanism 260 are configured to be able to move relative to each other in the preset assembly direction. The shell fixing mechanism 210 can be lowered relative to the guide and positioning mechanism 260, so that the guide and positioning mechanism 260 can position the shell 10. The shell fixing mechanism 210 and the guide and positioning mechanism 260 are configured to descend together relative to the supporting mechanism 300 after the guide and positioning mechanism 260 has positioned the shell 10, so that the guide and positioning mechanism 260 can position the electrode assembly 20.

[0230] The guide and positioning mechanism 260 includes a positioning guide plate 263, which is located between the housing fixing mechanism 210 and the supporting mechanism 300. The positioning guide plate 263 defines a positioning hole 264 extending along a predetermined assembly direction. The positioning hole 264 is used to position and align the housing 10 and the electrode assembly 20. The guide and positioning mechanism 260 includes a positioning drive mechanism 265. The positioning guide plate 263 includes at least two guide plates 2631. The positioning drive mechanism 265 is in driving connection with the at least two guide plates 2631 to drive the at least two guide plates 2631 to mate or detach with each other in a direction perpendicular to the predetermined assembly direction. The at least two guide plates 2631 mate to form the positioning hole 264. The positioning drive mechanism 265 is configured to drive the at least two guide plates 2631 to mate with each other when the housing fixing mechanism 210 descends to a predetermined position relative to the guide and positioning mechanism 260, so that the housing 10 can be positioned through the positioning hole 264. After being assembled, the at least two guide plates 2631 can be lowered along with the housing fixing mechanism 210 to position the electrode assembly 20 through the positioning hole 264. Each guide plate 2631 has a portion of a hole wall for surrounding the positioning hole 264. The portion of the hole wall includes a first hole wall section 2632 and a second hole wall section 2633 connected along a predetermined assembly direction. The connection between the first hole wall section 2632 and the second hole wall section 2633 forms a supporting edge 2634. When the at least two guide plates 2631 are assembled, their supporting edges 2634 are joined to form a supporting platform 2635 facing the housing fixing mechanism 210. The supporting platform 2635 is used to abut the open end 12 of the housing 10 to position the housing 10. The positioning hole 264 is configured to allow the electrode assembly 20 to pass through the positioning hole 264 from the other side of the at least two guide plates 2631 facing away from the supporting platform 2635 to position the electrode assembly 20. The positioning drive mechanism 265 is configured to drive at least two guide plates 2631 to separate from each other after the electrode ear guide mechanism 220 contacts the electrode ear 21, thereby removing the stop of the support surface 2635 on the open end 12, allowing the shell fixing mechanism 210 to further insert the shell 10 into the electrode assembly 20. A guide slope 2636 is provided on both sides of the positioning guide plate 263. The guide slope 2636 is arranged in a converging shape toward the positioning hole 264 to guide the open end 12 and the electrode assembly 20 into the positioning hole 264.

[0231] In some embodiments, as shown in FIG10 , the carrying mechanism 300 includes a carrying clamp 320 and a clamp driving mechanism 330, and the carrying clamp 320 is connected to the clamp driving mechanism 330. The carrying clamp 320 is used to clamp the electrode assembly 20, and the clamp driving mechanism 330 is used to drive the carrying clamp 320 to switch between a clamping state and an unloading state. The clamp driving mechanism 330 is configured to drive the carrying clamp 320 to switch to an unloading state during the process of inserting the shell 10 into the electrode assembly 20, so as to avoid the shell fixing mechanism 210. The shell fixing mechanism 210 is configured to clamp the shell 10, and the pole ear guiding mechanism 220 is configured to clamp the pole ear 21, so as to clamp the pole ear 21 and guide the pole ear 21 to pass through the accommodating cavity 11 from the through hole 14.

[0232] In a second aspect, the present application provides a battery assembly system, which may include the shell insertion device 2 as described above. The battery 1 may include a shell 10, a bottom cover 30, and an electrode assembly 20. The shell 10 has an open end 12, and a pole 15 is provided on the wall of the shell 10 opposite to the open end 12. The pole 15 has a through hole 14. The shell 10 and the bottom cover 30 are connected to form a accommodating cavity 11 connected to the through hole 14. The active material coating portion of the electrode assembly 20 is provided in the shell, and the pole ear portion 21 of the electrode assembly 20 is connected to the side of the pole 15 away from the accommodating cavity 11 through the through hole 14.

[0233] The battery assembly system may include a conveying device and an assembly device. The conveying device is used to transport the structure to be assembled and the supporting mechanism 300 described above to each workstation of the assembly device. The workstations of the assembly device include at least a terminal lug welding device, a terminal lug piercing device, a pole welding device, a bottom cover welding device, and the shell insertion device 2 described above.

[0234] Among them, the pole ear welding device can be used to weld multiple pole ear sheets of the electrode assembly 20 to form the pole ear portion 21. The shell insertion device 2 is used to install the electrode assembly 20 into the housing 10 from the open end 12. The pole ear penetration device is used to clamp the pole ear portion 21 through the through hole 14 when the electrode assembly 20 is installed in the housing 10. The pole column welding device is used to weld the pole ear portion 21 passing through the through hole to the side of the pole 15 facing away from the accommodating cavity 11. The bottom cover welding device is used to weld the bottom cover 30 to the open end 12 of the housing 10.

[0235] In a third aspect, as shown in FIG1 , the present application provides an assembly method for a battery 1 , which includes a housing 10 and an electrode assembly 20 . The housing 10 is provided with a housing cavity 11 and an open end 12 communicating with the housing cavity 11 . The housing 10 further has a top 13 disposed opposite the open end 12 , and the top 13 is provided with a through hole 14 communicating with the housing cavity 11 and the outside world. An electrode lug 21 is provided at one end of the electrode assembly 20 . The housing 10 is used to insert the electrode assembly 20 through the open end 12 so as to accommodate the electrode assembly 20 in the housing cavity 11 and allow the lug 21 to pass through the through hole 14 .

[0236] The assembly method includes: fixing the shell 10 and the electrode assembly 20 respectively; controlling the shell 0 to descend relative to the supporting mechanism 300 so that the shell 10 is inserted into the electrode assembly 20 through the open end 12 during the descending process; and guiding the pole ear portion 21 to pass through the accommodating cavity 11 from the through hole 14 during the process of the shell 10 being inserted into the electrode assembly 20.

[0237] Before the control housing 10 is lowered relative to the supporting mechanism 300, the control unit 10 is guided to pass from one side of the housing 10 through the through hole 14 into the accommodating cavity 11. Guiding the electrode tab 21 to pass out of the accommodating cavity 11 through the through hole 14 includes contacting the electrode tab 21 during the process of inserting the housing 10 into the electrode assembly 20, and guiding the electrode tab 21 to pass out of the accommodating cavity 11 through the through hole 14.

[0238] During the process of inserting the shell 10 into the electrode assembly 20, the pole ear portion 21 is contacted and the pole ear portion 21 is guided to pass through the accommodating cavity 11 from the through hole 14, including: in the first stage, the pole ear portion 21 is contacted in the accommodating cavity 11; in the second stage, the shell 10 is controlled to descend relative to the pole ear portion 21, and the pole ear portion 21 is guided to pass through the accommodating cavity 11 from the through hole 14.

[0239] The assembly method further includes welding the pole lug portion 21 and the pole 15 .

[0240] The battery 1 may further include a pole cover 40 . The assembly method further includes: welding the pole cover 40 to the pole 15 so that the pole cover 40 closes the through hole 14 .

[0241] In summary, the present application provides a shell fixing mechanism 210 and a pole ear guiding mechanism 220 on the shell insertion device 2, wherein the shell fixing mechanism 210 can insert the shell 10 into the electrode assembly 20 through the open end 12 during the descent process, and the pole ear guiding mechanism 220 can guide the pole ear 21 to pass through the through hole 14 and out of the accommodating cavity 11 during the process of inserting the shell 10 into the electrode assembly 20. This design allows the pole ear 21 of the battery 1 to be guided through the through hole 14 when the electrode assembly 20 of the battery 1 is inserted into the shell, thereby making it less likely for the pole ear 21 to block the shell 10 from being inserted into the electrode assembly 20, thereby achieving precise shell insertion of the electrode assembly 20, thereby improving the assembly efficiency and yield rate of the shell insertion device 2.

[0242] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery shell insertion device, characterized in that: The battery comprises a shell, a bottom cover and an electrode assembly; the shell has an open end, a pole is arranged on a wall of the shell opposite to the open end, the pole has a through hole, the shell and the bottom cover are connected to form a receiving cavity communicated with the through hole; the active material coating part of the electrode assembly is arranged in the shell, and the pole ear part of the electrode assembly passes through the through hole and is connected to a side of the pole away from the receiving cavity; The shell insertion device comprises: frame; A bearing mechanism, disposed on the frame, for bearing the bottom cover and the electrode assembly supported above the bottom cover; A shell loading mechanism, arranged on the frame, comprising a shell fixing mechanism and a pole ear guide mechanism, wherein the shell fixing mechanism is used to fix the shell, and both the pole ear guide mechanism and the shell fixing mechanism can be close to or away from the bearing mechanism; Among them, the shell fixing mechanism is configured to be able to sleeve the shell on the outside of the electrode assembly through the open end when moving close to the supporting mechanism; the pole ear guiding mechanism is configured to guide the pole ear to pass through the accommodating cavity from the through hole when the shell is sleeved on the electrode assembly.

2. The shell insertion device according to claim 1, characterized in that: The pole lug guiding mechanism and the shell fixing mechanism are both arranged above the supporting mechanism, and both can rise or fall relative to the supporting mechanism.

3. The shell insertion device according to claim 2, characterized in that: The process of inserting the shell into the electrode assembly includes a first stage and a second stage arranged in sequence; in the first stage, the shell fixing mechanism and the pole ear guiding mechanism are arranged to be able to descend together relative to the supporting mechanism, so that the pole ear guiding mechanism can contact the pole ear in the accommodating cavity; in the second stage, the shell fixing mechanism is arranged to be able to descend relative to the pole ear guiding mechanism, so that the pole ear guiding mechanism guides the pole ear to pass through the through hole to pass through the accommodating cavity.

4. The shell insertion device according to claim 3, characterized in that: Before the first stage, the pole ear guiding mechanism is configured to be able to descend along a preset assembly direction relative to the shell fixing mechanism, and penetrate into the accommodating cavity through the through hole from one side of the shell, and descend relative to the supporting mechanism together with the shell fixing mechanism in the first stage.

5. The shell insertion device according to claim 2, characterized in that: The shell fixing mechanism is slidably arranged on the frame so as to be able to rise or fall relative to the supporting mechanism, and the pole ear guiding mechanism is slidably connected to the shell fixing mechanism so as to be able to rise or fall relative to the supporting mechanism.

6. The shell insertion device according to claim 5, characterized in that: The shell loading mechanism includes a first lifting drive mechanism, and the shell fixing mechanism includes a first support frame and a fixed actuator, the first support frame is slidably arranged on the frame, the first lifting drive mechanism is arranged on the frame, and is used to drive the first support frame to lift relative to the frame, and the fixed actuator is arranged on the first support frame, and the fixed actuator is used to fix the shell; The shell loading mechanism also includes a second lifting drive mechanism, and the pole ear guiding mechanism includes a second support frame and a guiding actuator. The second support frame is slidably arranged on the first support frame, and the second lifting drive mechanism is arranged on the first support frame for driving the second support frame to lift and lower relative to the first support frame. The guiding actuator is arranged on the second support frame, and the guiding actuator is used to contact and guide the pole ear.

7. The shell insertion device according to claim 5, characterized in that: The shell loading mechanism includes a guiding and positioning mechanism, which is slidably arranged on the frame so as to be able to be lifted and lowered relative to the frame; the shell fixing mechanism is slidably connected to the guiding and positioning mechanism so as to be able to be lifted and lowered relative to the guiding and positioning mechanism; the guiding and positioning mechanism is used to position and align the shell and the electrode assembly before the shell is inserted into the electrode assembly, and is configured to guide the relative movement between the electrode assembly and the shell when the shell is inserted into the electrode assembly.

8. The shell insertion device according to claim 7, characterized in that: The shell loading mechanism also includes a third lifting drive mechanism; the guiding and positioning mechanism includes a third support frame and a positioning actuator, the third support frame is slidably arranged on the frame, and the third lifting drive mechanism is arranged on the frame, and is used to drive the third support frame to lift and lower relative to the frame; the positioning actuator is arranged on the third support frame; the positioning actuator is used to position and align the shell and the electrode assembly, and guide the relative movement of the electrode assembly and the shell.

9. The shell insertion device according to claim 1, characterized in that: The shell loading mechanism includes a guide positioning mechanism, which is arranged between the shell fixing mechanism and the bearing mechanism; The mechanism is configured to position and align the shell and the electrode assembly before the shell is inserted into the electrode assembly.

10. The shell insertion device according to claim 9, characterized in that: The guiding and positioning mechanism is configured to guide the relative movement between the electrode assembly and the shell along a preset assembly direction during the process of the shell being inserted into the electrode assembly.

11. The shell insertion device according to claim 10, characterized in that: The shell fixing mechanism and the guide positioning mechanism are arranged to be able to move relative to each other in the preset assembly direction, and the shell fixing mechanism can be lowered relative to the guide positioning mechanism so that the guide positioning mechanism positions the shell; The shell fixing mechanism and the guide positioning mechanism are configured to descend together relative to the supporting mechanism after the guide positioning mechanism positions the shell, so that the guide positioning mechanism positions the electrode assembly.

12. The shell insertion device according to claim 10, characterized in that: The guiding and positioning mechanism includes a positioning guide plate, which is located between the shell fixing mechanism and the supporting mechanism. The positioning guide plate is provided with a positioning hole that passes through the preset assembly direction, and the positioning hole is used to position and align the shell and the electrode assembly.

13. The shell insertion device according to claim 12, characterized in that: The guiding and positioning mechanism includes a positioning drive mechanism, and the positioning guide plate includes at least two guide plates. The positioning drive mechanism is transmission-connected to the at least two guide plates so as to be able to drive the at least two guide plates to be assembled or separated from each other in a direction perpendicular to the preset assembly direction. The at least two guide plates are assembled to form the positioning hole.

14. The shell insertion device according to claim 13, characterized in that: The positioning drive mechanism is configured to drive the at least two guide plates to mate with each other when the shell fixing mechanism descends to a preset position relative to the guide positioning mechanism, so that the shell can be positioned through the positioning hole; after being assembled with each other, the at least two guide plates can descend together with the shell fixing mechanism, so that the electrode assembly can be positioned through the positioning hole.

15. The shell insertion device according to claim 13, characterized in that: Each of the guide plates has a partial hole wall for surrounding the positioning hole, and the partial hole wall includes a first hole wall section and a first hole wall section connected along the preset assembly direction, and the connection between the first hole wall section and the first hole wall section forms a supporting edge portion; when the at least two guide plates are assembled with each other, the supporting edges are assembled with each other to form a supporting platform surface facing the shell fixing mechanism, and the supporting platform surface is used to abut the open end of the shell to position the shell; the positioning hole is configured to allow the electrode assembly to pass through the positioning hole from the other side of the at least two guide plates away from the supporting platform surface to position the electrode assembly.

16. The shell insertion device according to claim 15, characterized in that: The positioning drive mechanism is configured to drive the at least two guide plates to separate from each other after the pole ear guiding mechanism contacts the pole ear to evacuate the stopper of the support platform facing the open end, so that the shell fixing mechanism can further insert the shell into the electrode assembly.

17. The shell insertion device according to claim 12, characterized in that: Guide slopes are respectively arranged on both sides of the positioning guide plate, and the guide slopes are arranged in a convergent shape in a direction close to the positioning hole to guide the opening end and the electrode assembly to move into the positioning hole.

18. The shell insertion device according to claim 1, characterized in that: The carrying mechanism includes a carrying clamp and a clamp driving mechanism, and the clamp driving mechanism is connected to the carrying clamp; the carrying clamp is used to clamp the electrode assembly, and the clamp driving mechanism is used to drive the carrying clamp to switch between a clamping state and an unloading state; the clamp driving mechanism is configured to drive the carrying clamp to switch to the unloading state during the process of the shell being inserted into the electrode assembly to avoid the shell fixing mechanism.

19. The shell insertion device according to any one of claims 1 to 18, characterized in that: The shell fixing mechanism is configured to clamp the shell, and the pole ear guiding mechanism is configured to clamp the pole ear, so as to clamp the pole ear and guide the pole ear to pass through the accommodating cavity from the through hole.

20. A battery assembly system, characterized in that: include: The shell insertion device according to any one of claims 1 to 19.

21. The battery assembly system according to claim 20, characterized in that: The battery assembly system further includes a conveying device and an assembly device, wherein the conveying device is used to convey the structure to be assembled to each station of the assembly device; the station of the assembly device includes the shell insertion device, and at least also includes a pole ear welding device, a pole ear piercing device, a pole column welding device and a bottom cover welding device; The electrode ear welding device is used to weld the multiple electrode ear parts of the electrode assembly to form an electrode ear part; the shell insertion device is used to insert the electrode assembly from the The shell is installed at the open end; the pole ear device is used to clamp the pole ear through the through hole when the electrode assembly is installed in the shell; the pole welding device is used to weld the pole ear passing through the through hole to the side of the pole away from the accommodating cavity; the bottom cover welding device is used to weld the bottom cover to the open end of the shell.

22. A battery assembly method, characterized in that: The battery comprises a shell and an electrode assembly; the shell has an open end, a pole is arranged on a wall of the shell opposite to the open end, the pole has a through hole, the shell and the bottom cover are connected to form a receiving cavity connected to the through hole; the active material coating part of the electrode assembly is arranged in the shell, and the pole ear part of the electrode assembly passes through the through hole and is connected to a side of the pole away from the receiving cavity; the assembly method comprises: respectively fixing the housing and the electrode assembly; Controlling the shell to descend relative to the electrode assembly so that the shell is inserted into the electrode assembly through the open end during the descending process; When the shell is inserted into the electrode assembly, the electrode ear is guided to pass through the through hole and out of the accommodating cavity.

23. The assembly method according to claim 22, characterized in that: Before controlling the housing to descend relative to the electrode assembly, the method further comprises: From one side of the shell, penetrate into the accommodating cavity through the through hole to clamp the pole ear portion; The step of guiding the pole ear portion to pass through the accommodating cavity from the through hole comprises: When the shell is inserted into the electrode assembly, the shell contacts the pole ear portion and guides the pole ear portion to pass through the through hole and out of the accommodating cavity.

24. The assembly method according to claim 23, characterized in that: The method of contacting the electrode ear portion and guiding the electrode ear portion to pass through the accommodating cavity through the through hole during the process of inserting the housing into the electrode assembly comprises: In a first stage, contacting the pole ear portion in the accommodation cavity; In the second stage, the housing is controlled to descend relative to the pole lug portion, and the pole lug portion is guided to pass through the through hole and out of the accommodating cavity.

25. The assembly method according to claim 24, characterized in that: The assembly method further comprises: The pole lug portion and the pole post are welded.

26. The assembly method according to claim 25, characterized in that: The battery further includes a pole cover; and the assembly method further includes: The pole cover plate and the pole are welded to make the pole cover plate close the through hole.

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