CN216213619U

CN216213619U - Equipment for assembling battery pack

Info

Publication number: CN216213619U
Application number: CN202122475133.2U
Authority: CN
Inventors: 吴译晨; 肖青林; 谢祯兴; 周文林; 杨丽美; 刘晓梅
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-04-05
Anticipated expiration: 2031-10-14
Also published as: WO2023061369A1

Abstract

The present invention provides an apparatus for assembling a battery pack, the battery pack including an electrode assembly and a case, the electrode assembly being a wound electrode assembly, comprising: the device comprises a rack, a shell fixing mechanism and a shell fixing mechanism, wherein the shell fixing mechanism is used for fixing a shell; and the electrode assembly introducing port corresponds to the opening of the shell fixed by the shell fixing mechanism, and at least one side wall of the inner wall of the electrode assembly introducing port is provided with a rolling piece. Through the scheme, the rolling piece is arranged on the inner wall of the introducing port, so that the friction force applied to the electrode assembly assembled in the shell is changed from sliding friction force to rolling friction force, and the possibility of damage to the electrode assembly in the shell assembling process is greatly reduced.

Description

Equipment for assembling battery pack

Technical Field

The utility model relates to the field of battery assembly, in particular to an assembly device capable of facilitating the electrode assembly to enter a shell.

Background

At present, the social progress faces a severe situation due to environmental energy problems, and low carbon and environmental protection become a major theme of future economic development. Energy storage and efficient use have attracted attention in various respects, with lithium ion battery cells existing as the smallest unit for energy storage. Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in its development. The battery is a structural form which effectively connects a plurality of battery components, and the requirement of supplying power to electric equipment is met by connecting a certain number of battery components in series/parallel/series-parallel in series-parallel. During the production, transportation and packaging of the battery assembly, the electrode assembly of the battery assembly needs to be assembled into the case to complete the assembly of the battery assembly. How the electrode assembly can be mounted in the case without damage also constitutes a new problem.

Disclosure of Invention

The utility model aims to provide equipment for assembling a battery pack, and solves the problem that the casing is frequently damaged due to the fact that equipment is lacked when the battery pack is arranged in the casing in the prior art.

The utility model is realized by the following steps: an apparatus for assembling a battery pack including an electrode assembly and a case, the electrode assembly being a wound electrode assembly, comprising:

the device comprises a rack, a shell fixing mechanism and a shell fixing mechanism, wherein the shell fixing mechanism is used for fixing a shell; and the electrode assembly introducing port corresponds to the opening of the shell fixed by the shell fixing mechanism, and at least one side wall of the inner wall of the electrode assembly introducing port is provided with a rolling piece.

Through the scheme, the shell fixing mechanism can fix the shell firstly, and then is provided with the special introducing port to align the shell fixing mechanism, so that the position of the electrode assembly can be found easily in the assembling process, and the electrode assembly cannot deviate. Meanwhile, the rolling element is arranged on the inner wall of the lead-in opening, so that the friction force applied to the electrode assembly assembled in the shell is changed from sliding friction force to rolling friction force, and the possibility of damage to the electrode assembly in the shell assembling process is greatly reduced. Meanwhile, the rolling part is used as a part with certain hardness, the surface of the electrode assembly can be compacted, the cross section area of the originally fluffy electrode assembly is reduced, and the possibility of scratching is further reduced.

In one aspect of the present application, the rolling axis of the rolling member is parallel to the side wall of the electrode assembly introduction port where the rolling member is located, and is perpendicular to the introduction direction of the electrode assembly. The rolling member is arranged to comprise a rolling shaft, and the rolling shaft can guide the electrode assembly to move along the lead-in surface when rolling, so that the lead-in of the electrode assembly is more convenient.

In one aspect of the present application, rolling members are provided on both side walls of the electrode assembly introduction port inner wall opposite to each other. The rolling parts are arranged on the two side walls, so that the friction force applied to the two sides of the shell for assembling the electrode assembly is changed from sliding friction force to rolling friction force, and meanwhile, the rolling parts are used as parts with certain hardness and can compress the two side surfaces of the surface of the electrode assembly, thereby reducing the cross section area of the originally fluffy electrode assembly and further reducing the possibility of scratching.

In one aspect of the present application, the electrode assembly introduction port is provided with a side wall of the roller and a side wall opposite thereto, a contact surface with the electrode assembly is an electrode assembly introduction surface located on an inner side of an inner wall of the case corresponding thereto, or the electrode assembly introduction surface extends into the opening of the case. The electrode assembly lead-in surface is arranged on the inner side of the shell inner wall, so that the electrode assembly can enter along the electrode assembly lead-in surface when being led in, the contact with the shell inner wall is avoided, the possibility of the contact of the electrode assembly and the shell inner wall is reduced, and the electrode assembly and the shell inner wall are prevented from being scratched.

In one aspect of the present application, the contact surfaces of the electrode assembly introduction port and the electrode assembly are both located inside the case inner wall. The contact surfaces of the electrode assembly introducing port and the electrode assembly are positioned on the inner side of the inner wall of the shell, so that the position of the electrode assembly can be further limited, and the electrode assembly and the inner wall of the shell can be further prevented from being scratched.

In one aspect of the present application, the rolling members are disposed on the electrode assembly introduction port on the side walls corresponding to the long sides of the electrode assembly. The deformation amount of the long edge is larger, so that the pressing requirement of the electrode assembly introducing port on the long edge is stronger, and the effect of avoiding scratches can be achieved by pressing the long edge.

In one aspect of the application, the rolling elements are rollers, pulleys or balls. The roller, the pulley or the ball can provide rolling friction force, and the entering of the electrode assembly into the shell can be smoother.

In one aspect of the present application, the radius of the rolling member is gradually reduced in the introduction direction of the electrode assembly. The radius leading-in directions of the rolling parts are sequentially contracted, so that the rolling part which contacts the electrode assembly firstly is a rolling part with a larger radius, and the rolling part with the larger radius means that a larger position error of the electrode assembly can be tolerated, so that the material cost of the rolling part can be reduced on the premise of ensuring the correction error by sequentially contracting the radius leading-in directions of the rolling part.

In one aspect of the present application, a width of the electrode assembly introduction port between the side wall provided with the rolling member and the opposite side wall thereof is gradually reduced in an introduction direction of the electrode assembly. The electrode assembly introducing port is sequentially reduced, so that the electrode assembly introducing port can tolerate larger errors at the upper end, and the electrode assembly is accurately inserted into the shell after the lower end is reduced.

In one aspect of the application, a housing reshaping component is disposed on the housing securing mechanism and is used for applying a force to the housing sidewall to reshape the housing sidewall into a predetermined shape. The casing is because the characteristic of its material, and the distance between the lateral wall of casing probably has undulantly, levels the casing lateral wall through casing certificate type subassembly, can promote the roughness of casing, finally promotes battery pack's product quality.

In one aspect of the present application, the shell reshaping component is disposed at or near the shell opening for applying a force to the shell opening or a sidewall near the shell opening. The side wall deformation amount of the opening of the shell is the largest, so that the shell has a better side wall shaping effect and easier force application.

In one aspect of the application, the shell reshaping component comprises a suction cup for being adsorbed on the side wall of the shell, or an abutting piece for abutting against the side wall of the shell, or a reshaping rod for pressing and contacting the side wall of the shell. The sucking disc can adsorb on the casing, is suitable for and draws or pushes away the operation, supports the liftout and is used for exerting pressure, and the plastic pole is used for exerting pressure, and above-mentioned casing plastic subassembly can both realize the level and smooth, the plastic effect to the casing.

In one aspect of the application, the shell reshaping component is arranged on the shell side wall where the long edge of the shell is located, and is used for applying force to the shell side wall where the long edge of the shell is located. Due to the characteristics of materials, the deformation amount of the long side of the shell is larger, so that the requirement for shaping the long side by arranging the electrode assembly introducing port is stronger, and the effect of avoiding scratches can be better achieved by shaping the long side.

In one aspect of the present application, a housing fixing mechanism includes:

the rack side brackets are oppositely arranged; the shell supporting piece is used for supporting the shell and is matched with the side bracket of the rack in an adjustable lifting mode. Through the support of design both sides, can make the structure of frame comparatively simple, provide the casing simultaneously and hold in the palm the piece and go up and down for the casing of frame can the not co-altitude of adaptation, through the distance between the adjustment support, the battery pack of the different width of frame adaptation.

In one aspect of the present application, the electrode assembly introduction port is fixed to an upper portion of the chassis. The battery pack introducing port can be arranged separately from the shell fixing piece, and can also be integrally fixed on the upper part of the rack, so that the electrode pack introducing port can be used all the time just facing the shell without debugging, and the maintenance is convenient.

In one aspect of the present application, the electrode assembly introduction port is detachably connected to the upper part of the chassis. The electrode assembly introducing port is detachably connected with the split type design on the upper part of the machine frame, so that the whole structure is more flexible, and the electrode assembly introducing port is convenient to carry, disassemble and clean and the like after being disassembled.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

fig. 1 is a perspective view of a battery pack assembly apparatus according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of an apparatus for assembling a battery pack according to an embodiment of the present invention;

FIG. 3 is a schematic view of an electrode assembly inlet port structure according to an embodiment of the present invention;

FIG. 4 is a partial enlarged view of an electrode assembly inlet port structure according to an embodiment of the present invention;

fig. 5 is a schematic view of a housing fixing mechanism according to an embodiment of the utility model.

Description of reference numerals:

1. an electrode assembly;

2. a housing;

3. a frame;

31. an inlet port;

311. a rolling member;

32. a housing fixing mechanism;

321. a side bracket;

322. a housing holder;

33. a housing fairing assembly.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms of art "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal" and "top" are used for the description of the embodiments of the present application "

The references to "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings and are only for convenience in describing the embodiments of the present application and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

The inventor notices that the prior art has a guide device for pushing the battery core into the shell, but the electrode assembly is completed by winding the electrode sheet, and the structure of the electrode assembly is fluffy. Due to the problems of materials and forming structures, the edge of the shell has a certain wave-shaped structure, and the distance between two side walls has fluctuating change at the same horizontal height. Therefore, when the electrode assembly is placed into the shell, the electrode assembly has large friction force with the opening and the shell wall of the battery shell, and the pushing force is large when the electrode assembly is placed into the shell, so that the winding core is scratched at the opening of the shell, and the polar plates in the winding core are dislocated, so that the short circuit risk exists.

The battery assembly disclosed in the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but not limited to the electric devices. A power supply system including the battery pack, the battery, and the like disclosed in the present application may be used.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

The inventors of the present application have further recognized that the success rate of battery pack encasing can be improved if there is a means for assisting encasing of the electrode assembly to reduce the amount of encasing friction and encasing deformation.

Here, referring to fig. 1 and 2, a perspective view and a longitudinal sectional view of a battery module assembling apparatus according to the present invention are shown, respectively. The battery assembly includes an electrode assembly 1 and a case 2, the electrode assembly 1 being a wound electrode assembly 1 including: the device comprises a rack 3, wherein the rack 3 is provided with a shell fixing mechanism 32, and the shell fixing mechanism 32 is used for fixing a shell 2; an electrode assembly introducing port 31, the electrode assembly introducing port 31 corresponding to the opening of the case 2 fixed by the case fixing mechanism 32, and a rolling member 311 provided on at least one side wall of the inner wall of the electrode assembly introducing port 31.

The frame 3 is herein referred to collectively as the overall frame, and serves primarily to support the housing 2.

The case fixing mechanism 32 on the chassis 3 may be separate from the electrode assembly introduction port 31 with the electrode assembly introduction port 31 being present as a separate component, or the case fixing mechanism 32 may be integrally formed with the electrode assembly introduction port 31 as shown in fig. 1 or 2, with the electrode assembly introduction port 31 being a square-shaped portion above the case fixing mechanism, and both may not even have a clear boundary line.

The electrode assembly introduction port 31 is used to receive and guide the electrode assembly 1, and the electrode assembly 1 may be a wound battery cell or a battery cell with a top cover assembled by welding. The electrode assembly introducing port 31 corresponds to a preset position of the case 2 to be fixed by the case fixing mechanism 32, and as shown in fig. 1, the electrode assembly introducing port 31 is disposed above the case 2 to be fixed, the case fixing mechanism 32 is disposed below the case 2, the case fixing mechanism 32 is a limit plate adapted to the bottom of the case 2, and the limit plate has a limit groove adapted to the bottom of the case 2.

The rolling member 311 is a member capable of generating a rolling friction force for contacting the electrode assembly 1 and providing a rolling friction force for the movement thereof.

Through the above scheme, the case fixing mechanism 32 can fix the case 2 first, and then align the case fixing mechanism 32 through the electrode assembly introducing port 31, so that the position of the electrode assembly 1 can be easily found in the assembling process without deviation. Meanwhile, a rolling part 311 is arranged on the inner wall of the lead-in opening 31, so that the friction force applied to the electrode assembly 1 assembled in the shell 2 is changed from sliding friction force to rolling friction force, and when the electrode assembly is used, the electrode assembly 1 is only approximately aligned with the lead-in opening 31 of the electrode assembly in the vertical direction, and one side of the electrode assembly abuts against the rolling part 311, so that the electrode assembly can smoothly enter the shell 2 with the help of the rolling part 311. The possibility of damage to the electrode assembly 1 during assembly into the case is greatly reduced. On the other hand, the rolling member 311 is a member with a certain hardness, and after the rolling member 311 abuts against the electrode assembly 1, the rolling member can also apply force to the surface of the electrode assembly 1 to compress the surface of the electrode assembly 1, so that the cross-sectional area of the originally fluffy electrode assembly 1 is reduced, and the possibility of scratching is further reduced.

In other embodiments, the rolling axis of the rolling member 311 is parallel to the sidewall of the electrode assembly introduction port 31 where it is located, and is perpendicular to the introduction direction of the electrode assembly 1. As shown in fig. 1, the rolling axis of the rolling member 311 is in a direction out of the plane of the drawing, the sidewall of the electrode assembly introduction port 31 extends in the vertical direction, and the introduction direction of the electrode assembly 1 is vertically downward. In the above scheme, the rolling member 311 is configured to include a rolling shaft, so that the electrode assembly 1 can be guided to move along the lead-in surface when the rolling shaft rolls, and the lead-in surface is a surface formed by connecting the rolling member 311 and the contact of the electrode assembly 1. The above arrangement makes the introduction of the electrode assembly 1 more convenient.

In other embodiments, as shown in fig. 1, rolling members 311 are disposed on two opposite side walls of the inner wall of the electrode assembly introduction port 31. The two side walls are provided with rolling members 311 for the left and right side walls in the figure. The rolling pieces 311 are arranged on the two side walls, so that the friction force applied to the two sides of the electrode assembly assembled in the shell 2 is changed from sliding friction force to rolling friction force, and meanwhile, the rolling pieces 311 are used as parts with certain hardness and can compress the two side surfaces of the surface of the electrode assembly 1, thereby reducing the cross section area of the originally fluffy electrode assembly 1 and further reducing the possibility of scratching.

In other embodiments, the electrode assembly introduction port 31 is provided with a side wall of the rolling member 311 and a side wall opposite to the side wall, a contact surface with the electrode assembly 1 is an electrode assembly 1 introduction surface, the electrode assembly 1 introduction surface is located at the inner side of the inner wall of the case 2 corresponding to the electrode assembly 1 introduction surface, or the electrode assembly 1 introduction surface extends into the opening of the case 2. For example, in some embodiments, the lead-in surface of the electrode assembly 1 is arranged on the inner side of the inner wall of the shell 2, so that the electrode assembly 1 enters along the lead-in surface of the electrode assembly 1 during lead-in, thereby avoiding contact with the inner wall of the shell 2, in other embodiments, the lead-in surface of the electrode assembly 1 is arranged obliquely, the upper end of the lead-in surface of the electrode assembly 1 is wider than the inner wall of the shell 2, and the lower end of the lead-in surface of the electrode assembly 1 is narrower than the inner wall of the shell 2. The above-described arrangement of the lead-in surface of the electrode assembly 1 can gradually guide the electrode assembly 1 into the inside of the case 2. The possibility of contact of the electrode assembly 1 with the inner wall of the case 2 can be reduced, thereby preventing the electrode assembly 1 from being scratched with the inner wall of the case 2.

In one embodiment of the present application, as shown in fig. 1, the contact surfaces of the electrode assembly introduction port 31 and the electrode assembly 1 are both located inside the inner wall of the case 2. The electrode assembly introduction port 31 is located entirely inside the inner wall of the case 2, showing that the electrode assembly 1 is already located inside the inner wall of the case 2 while entering the electrode assembly introduction port 31. With this arrangement, the contact surfaces of the electrode assembly introduction port 31 and the electrode assembly 1 are located on the inner side of the inner wall of the case 2, so that the position of the electrode assembly 1 can be further restricted, and the electrode assembly 1 and the inner wall of the case 2 can be further prevented from being scratched.

In one aspect of the present application, the rolling members 311 are disposed on the electrode assembly introduction port 31 corresponding to the side walls of the long sides of the electrode assembly 1. In fig. 1, the long sides of the electrode assembly 1 are the front and rear sides in the drawing, and in fig. 2, the long side direction of the electrode assembly 1 is parallel to the paper surface direction. In the example of winding the electrode assembly 1, the amount of deformation of the long side is larger, and therefore the need to set the electrode assembly introduction port 31 to press the long side is also stronger, and the effect of preventing scratches can be achieved by pressing the long side.

In one aspect of the present application, the rolling members 311 are rollers, pulleys, or balls. The rotation shafts of the roller and the pulley may be disposed to be directed outward perpendicular to the paper surface, and if the roller and the pulley are disposed as balls, some spaces for receiving the balls may be opened on the sidewall of the electrode assembly introduction port 31, and the balls may be partially inserted therein such that the balls are partially exposed, and the exposed balls may contact the electrode assembly 1 to guide the electrode assembly 1. The use of rollers, pulleys or balls all provide rolling friction, all of which can make the entry of the electrode assembly 1 into the case smoother. In the embodiment shown in fig. 3, which is a partial schematic view of the electrode assembly introducing port 31, it can be seen that the rolling member 311 is a roller, the roller is a strip-shaped roller, a plurality of rollers can be arranged at different heights on one surface, and can be contacted with the electrode assembly 1 gradually, the rolling member 311 can be arranged on both the long side wall and the wide side wall of the electrode assembly introducing port 31, and the rollers can be arranged on both the long side wall and the wide side wall.

In other embodiments of the present application, referring to fig. 4, the radius of the rolling member 311 is gradually reduced along the introduction direction of the electrode assembly 1 for a part (enlarged part of a region in fig. 2) of the electrode assembly introduction port 31. The number of rolling members 311 in the figure is 3, the radius of the uppermost rolling member 311 is the largest, and the radius of the lowermost rolling member 311 is the smallest. The radial introduction direction of the rolling member 311 is sequentially contracted so that the rolling member 311 which contacts the electrode assembly 1 first is the rolling member 311 having a larger radius, and the rolling member 311 having a larger radius means that a larger positional error of the electrode assembly 1 can be tolerated, so that the material cost of the rolling member 311 can be reduced while ensuring a correction error by sequentially contracting the radial introduction direction of the rolling member 311.

In other embodiments as shown in fig. 4, the electrode assembly introduction port 31 is gradually narrowed in width along the introduction direction of the electrode assembly 1 between the side wall provided with the rolling member 311 and the opposite side wall thereof. The gradual reduction of the electrode assembly introduction port 31 allows the electrode assembly introduction port 31 to tolerate larger errors at the upper end, and after the reduction of the lower end, the electrode assembly 1 is directly over the battery case 2 at this position, and finally, the accurate insertion of the electrode assembly 1 into the case is ensured.

In some embodiments of the present application, please refer to fig. 4, the housing fixing mechanism 32 is provided with a housing reshaping component 33, and the housing reshaping component 33 is used for applying a force to the side wall of the housing 2 to reshape the side wall of the housing 2 into a predetermined shape. The housing fairing assembly 33 can apply a pulling force, a pushing force, or a pulling force parallel to the surface of the housing 2 to the housing 2. The housing 2 may have fluctuations in the distance between the side walls of the housing 2 due to the characteristics of the material, the concave portion may be flattened by a tensile force, the convex portion may be flattened by a pushing force, or the wavy housing 2 may be flattened by a tensile force parallel to the surface of the housing 2. Level and smooth 2 lateral walls of casing through 2 certificate type subassemblies of casing, can promote 2 roughness of casing, finally promote battery pack's product quality. In other embodiments, the opening of the case 2 may be slightly enlarged by a pulling force, so that the electrode assembly 1 is less likely to touch the case 2 when entering the case, and the problem of scratching of the electrode assembly 1 can also be solved.

In other embodiments of the present application, the shell reshaping component 33 is disposed at the opening of the shell 2 or near the opening of the shell 2, and is used for applying force to the sidewall at the opening of the shell 2 or near the opening of the shell 2. As shown in fig. 2, the amount of deformation of the side wall at the opening at the upper portion of the housing 2 is maximized, and it is more effective to shape the side wall of the housing 2 at this point and to apply force more easily. The case 2 is enlarged at the upper portion, so that the electrode assembly 1 can be better received in the case to prevent scratches.

In other embodiments of the present application, the housing shaping assembly 33 includes a suction cup for being adsorbed on the sidewall of the housing 2, or an abutting member for abutting against the sidewall of the housing 2, or a shaping rod for pressing against the sidewall of the housing 2. The sucking disc can adsorb on casing 2, is suitable for to pull or push away the operation, supports the liftout and is used for exerting pressure, and the plastic pole is used for exerting pressure, and above-mentioned casing plastic subassembly 33 can both realize the level and smooth, the plastic effect to casing 2. As shown in fig. 4, the housing 2 is shaped by using a suction cup, the suction cup is sucked on the housing 2, and the suction cup can be manipulated to apply an outward pulling force after being fixed, thereby expanding the opening of the housing 2. A plurality of suckers can be arranged to be adsorbed on the shell 2 and move oppositely, and the wavy wrinkles of the shell 2 can be flattened.

In other embodiments, the housing reshaping component 33 is disposed on the sidewall of the housing 2 where the long side of the housing 2 is located, and is used for applying force to the sidewall of the housing 2 where the long side of the housing 2 is located. In fig. 3, the side wall of the housing 2 on which the long side is located and the side wall of the housing 2 on which the wide side is located are both provided with the housing reshaping component 33. In the practical application example, the deformation amount of the long side of the housing 2 is larger than that of the wide side, so that the adjustment requirement of the housing shaping assembly 33 on the long side is stronger, and the effect of avoiding scratches can be achieved by expanding the long side.

In the embodiment shown in fig. 5, the housing fixing mechanism 32 includes:

the frame side brackets 321 disposed oppositely; the shell supporting piece 322 is used for supporting the shell 2, and is matched with the rack side bracket 321 in an adjustable lifting mode. The adjustable lifting of the housing holder 322 can be achieved by a slide rail, a gear rack, or other design, for example, the rack side bracket 321 can be directly set as a slide rail or a rack, and the housing holder 322 can be correspondingly provided with a slide block or a gear. Through the support of design both sides, can be so that frame 3's structure is comparatively simple, provide the casing simultaneously and hold in the palm piece 322 and go up and down for frame 3 can the not casing 2 of co-altitude of adaptation, through the distance between the adjustment support, frame 3 can the battery pack of the different width of adaptation.

In other embodiments, the electrode assembly introduction port 31 is fixed to the upper portion of the chassis 3. The battery pack introduction port 31 may be provided separately from the case 2 fixing member or may be integrally fixed to the upper portion of the frame 3, which is advantageous in that the electrode pack introduction port 31 can be used always by being fixed to face the case 2 without adjustment, and maintenance is facilitated. In some embodiments, the electrode assembly introduction port 31 is detachably connected to the upper portion of the chassis 3. The electrode assembly introducing port 31 is detachably connected with the upper part of the frame 3 in a split design, so that the whole structure is more flexible, and the electrode assembly introducing port is convenient to carry, disassemble and clean and the like after being disassembled.

In some comprehensive embodiments, the device for assembling a battery pack of the present application includes a rack 3, where the rack 3 includes rack side brackets 321 on left and right sides, and the two side brackets 321 respectively correspond to two long sides of the battery pack. The bottom of the two side brackets 321 is provided with a shell bracket 322, the side brackets 321 and the shell bracket 322 form the shell fixing mechanism 32, and the shell 2 can be installed in the shell fixing mechanism 32. An electrode assembly introducing port 31 is further arranged above the case fixing mechanism 32, the width of the upper part of the electrode assembly introducing port 31 is larger than that of the lower part, rolling members 311 are further arranged on two inner walls of the electrode assembly introducing port 31, the rolling members 311 are three rolling wheels with gradually reduced sizes, and the contact surfaces of the rolling wheels and the electrode assembly 1 are vertically arranged and directed to the inside of the opening of the case 2. The housing fixing mechanism 32 is provided with a housing shaping unit 33, and the housing shaping unit 33 includes a suction cup for sucking the opening of the housing 2, shaping the opening, and enlarging the opening of the housing 2.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An apparatus for assembling a battery pack including an electrode assembly and a case, the electrode assembly being a wound electrode assembly, comprising:

the device comprises a rack, a shell fixing mechanism and a shell fixing mechanism, wherein the shell fixing mechanism is used for fixing the shell;

an electrode assembly inlet corresponding to the opening of the case fixed by the case fixing mechanism, at least one side wall of the inner wall of the electrode assembly inlet being provided with a rolling member.

2. The apparatus for assembling a battery module according to claim 1, wherein a rolling axis of the rolling member is parallel to a side wall of the electrode module introduction port where the rolling member is located, and is perpendicular to an introduction direction of the electrode module.

3. The apparatus for assembling a battery module according to claim 1 or 2, wherein the rolling members are provided on both side walls of the electrode module introduction port inner wall opposite to each other.

4. The apparatus for assembly of a battery pack according to any one of claims 1 to 2, wherein the electrode assembly introduction port is provided with a side wall of the rolling member, and an opposite side wall, a contact surface thereof with the electrode assembly being an electrode assembly introduction surface located on an inner side of the case inner wall corresponding thereto, or the electrode assembly introduction surface extending into an opening of the case.

5. The apparatus for assembly of a battery pack according to claim 4, wherein the electrode assembly introduction port and the contact surface of the electrode assembly are both located inside the case inner wall.

6. The apparatus for assembly of a battery module according to any one of claims 1, 2, and 5, wherein the rolling member is provided on a side wall of the electrode module introduction port corresponding to a long side of the electrode module.

7. An apparatus for assembling a battery pack according to any one of claims 1, 2 and 5, wherein said rolling member is a roller, a pulley or a ball.

8. The assembly jig of any one of claims 1, 2 and 5, wherein the radius of the rolling member is gradually reduced in the introduction direction of the electrode assembly.

9. The apparatus for assembling a battery module according to any one of claims 1, 2 and 5, wherein a width of the electrode module introduction port between the side wall provided with the rolling member and the opposite side wall thereof is gradually reduced in the introduction direction of the electrode module.

10. The device for assembling a battery pack according to any one of claims 1, 2 and 5, wherein a case shaping member for applying a force to the case side wall to shape the case side wall into a predetermined shape is provided on the case fixing mechanism.

11. The apparatus for assembly of a battery pack of claim 10, wherein the housing fairing assembly is positioned at or near the housing opening for applying force to the side wall at or near the housing opening.

12. The device for assembling a battery pack as claimed in claim 11, wherein the case shaping member includes a suction cup for being attached to the side wall of the case, or an abutting member for abutting against the side wall of the case, or a shaping rod for being pressed against the side wall of the case.

13. The apparatus for assembling a battery pack according to claim 11, wherein the case shaping member is provided on the case side wall where the long side of the case is located, for applying a force to the case side wall where the long side of the case is located.

14. The device for assembly of a battery assembly as recited in any one of claims 1, 2, 5, 11-13, wherein the housing securing mechanism comprises:

the rack side brackets are oppositely arranged;

and the shell supporting piece is used for supporting the shell and is matched with the rack side bracket in an adjustable lifting way.

15. The apparatus for battery module assembly according to any one of claims 1, 2, 5, and 11 to 13, wherein the electrode module introduction port is fixed to the upper part of the frame.

16. The apparatus for assembling a battery module as recited in claim 15, wherein the electrode module introduction port is detachably connected to the upper part of the housing.