CN220761108U

CN220761108U - Milling device and battery production line

Info

Publication number: CN220761108U
Application number: CN202420157995.1U
Authority: CN
Inventors: 刘禹文; 宋根利
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-01-23
Filing date: 2024-01-23
Publication date: 2024-04-12
Anticipated expiration: 2034-01-23

Abstract

The embodiment of the application provides a milling device and battery production line, milling device is used for milling the welding seam of battery monomer group, and milling device includes dust cover and milling part. The dust cover has a receiving cavity and a first opening, the first opening being in communication with the receiving cavity. The milling part is arranged in the accommodating cavity and is used for milling the welding seam. Wherein the dust cap is configured to cap the milling element and the weld when the milling element mills the weld, and the first opening is configured for the weld to enter the receiving cavity. The technical scheme provided by the application can improve the reliability of the battery.

Description

Milling device and battery production line

Technical Field

The application relates to the technical field of battery production, in particular to a milling device and a battery production line.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

In the development of battery technology, how to improve the reliability of a battery is a technical problem that needs to be solved in battery technology.

Disclosure of Invention

The application provides a milling device and battery production line, it can improve the reliability of battery.

The application is realized by the following technical scheme:

the application provides a milling device for milling the welding seam of battery monomer group, milling device includes dust cover and milling part. The dust cover has a receiving cavity and a first opening, the first opening being in communication with the receiving cavity. The milling part is arranged in the accommodating cavity and is used for milling the welding seam. Wherein the dust cap is configured to cap the milling element and the weld when the milling element mills the weld, and the first opening is configured for the weld to enter the receiving cavity.

According to the technical scheme, the milling part is arranged in the accommodating cavity, the welding line in the battery monomer group is milled through the milling part, the risk that the welding line interferes with other parts in the battery monomer group during assembly is reduced, meanwhile, the welding line is supplied to the accommodating cavity through the first opening during milling of the welding line, the milling part and the welding line are arranged through the dust cover, the probability of chip splashing during milling of the welding line is reduced, the risk that chips damage the battery monomer is reduced, and the reliability of the battery is improved.

In some embodiments, the dust cap has a first wall, the first opening is provided on the first wall, and the first wall is used for abutting with the battery cell group.

According to the technical scheme, the first wall of the dust cover is abutted with the battery monomer group, when the welding line is arranged on the dust cover, the first wall is abutted with the battery monomer group, the probability of producing scraps to splash out when the welding line is milled is further reduced, and therefore the risk of scraps to damage the battery monomer is reduced, and the reliability of the battery is improved.

In some embodiments, the milling device includes a first drive assembly including a first drive member and a first moving member, the first drive member coupled to the first moving member to drive the first moving member to move in a first direction. The dust cover is connected to the first moving part so as to be close to or far away from the welding seam along the first direction under the drive of the first moving part.

According to the technical scheme, the dust cover is connected to the first moving part, the first driving part is connected with the first moving part to drive the dust cover to approach the welding line along the first direction, convenience in welding line setting of the dust cover is improved, automation is improved, and meanwhile the dust cover is convenient to move so as to adapt to different battery monomer groups.

In some embodiments, the milling device further comprises a compression mechanism, the dust cap being connected to the first movable member by the compression mechanism, the compression mechanism being configured to provide a compression force for the dust cap to compress the battery cell stack and to control the compression force within a first pressure range.

According to the technical scheme, the pressing force for pressing the battery monomer group is provided for the dust cover through the pressing mechanism, so that the risk that the dust cover presses the battery monomer group to damage the battery monomer group is reduced, and the reliability of the battery is improved.

In some embodiments, the pressing mechanism includes a second driving member and a second moving member, the second driving member is connected to the first moving member, and the second driving member is connected to the second moving member to drive the second moving member to move along the first direction. The dust cover is arranged on the second moving part and is driven by the second moving part to approach or depart from the welding seam along the first direction.

According to the technical scheme, the dust cover is arranged on the second moving part, the second driving part is connected with the second moving part to drive the dust cover to approach or keep away from the welding seam along the first direction, the pressing force for pressing the battery unit is controlled through the second driving part, the risk that the dust cover presses the battery unit to damage the battery unit is reduced, and the reliability of the battery is improved.

In some embodiments, the milling part is disposed on the second moving part, so as to be close to or far away from the welding seam along the first direction under the driving of the second moving part.

According to the technical scheme, the second moving piece drives the milling piece to be close to or far away from the welding line along the first direction, so that the milling piece is convenient to mill the welding line, and meanwhile, the welding line of different battery monomer groups is convenient to adapt.

In some embodiments, the pressing mechanism includes an elastic member and a first fixing member, the first fixing member is disposed on the first moving member, one end of the elastic member is connected with the dust cover, the other end of the elastic member is connected with the first fixing member, and the elastic member is configured to provide a pressing force for pressing the battery cell group for the dust cover when the milling member moves to a preset position.

According to the technical scheme, one end of the elastic piece is connected with the first fixing piece, the other end of the elastic piece is connected with the dust cover, and elastic force is provided through the elastic piece so as to slow down the pressing force of the dust cover on the battery unit group, so that the risk that the dust cover presses the battery unit group is reduced, and the reliability of a battery is improved.

In some embodiments, in the second direction, the elastic member and the dust cover are disposed at intervals, and the pressing mechanism further includes a connecting member through which the dust cover is connected with one end of the elastic member, wherein the first direction and the second direction intersect.

According to the technical scheme, the connecting piece is connected with the elastic piece and the dust cover, so that the elastic piece is connected with the dust cover, the risk of crushing the battery monomer set through the elastic piece is reduced, and the reliability of the battery is improved.

In some embodiments, the hold-down mechanism further includes a second mount spaced apart from the first mount in the first direction, the second mount having a via extending through both surfaces of the second mount in the first direction. The connecting piece has first connecting portion and second connecting portion, and first connecting portion is located between first mounting and the second mounting and is connected with the elastic component, and the one end of second connecting portion wears to locate the via hole in order to be connected with first connecting portion, and the other end is connected with the dust cover, and in first direction, the projection of first connecting portion covers the projection of via hole.

According to the technical scheme, the second fixing piece is provided with the through hole for the second connecting portion to pass through, so that the connecting piece is convenient to connect with the elastic piece. Meanwhile, in the first direction, the projection of the first connecting part covers the projection of the through hole, so that the second fixing piece supports the first connecting part, and the stability of the pressing mechanism is improved.

In some embodiments, the hold-down mechanism further comprises a displacement sensor and a controller, the controller is electrically connected to the displacement sensor and the first driver, the displacement sensor is configured to detect a deformation amount of the elastic member, and the controller is configured to close the first driver when the deformation amount detected by the displacement sensor exceeds a set value.

According to the technical scheme, the displacement sensor detects the deformation of the elastic piece, when the detected deformation exceeds a set value, the first driving piece is closed through the controller, so that the pressing force of the dust cover pressing the battery cell group is controlled, the risk that the dust cover presses the battery cell group is reduced, and the reliability of the battery is improved.

In some embodiments, the pressing mechanism further includes a limiting member and a controller, the limiting member is disposed on the first fixing member, the limiting member is electrically connected with the controller and the first driving member, and the controller is configured to close the first driving member when the limiting member abuts against the connecting member.

According to the technical scheme, when the elastic piece deforms to enable the limiting piece to be in butt joint with the connecting piece, the controller closes the first driving piece, so that the dust cover is controlled to compress the compressing force of the battery unit group, the risk that the dust cover compresses the battery unit group is reduced, and the reliability of the battery is improved.

In some embodiments, the milling device further comprises a profiler coupled to the first movable member, the profiler being configured to detect a size of the weld.

According to the technical scheme, the size of the welding line is detected through the profiler, so that the accuracy of milling the welding line is improved, and the reliability of the battery is improved.

In some embodiments, the milling device further comprises a camera connected to the first moving member, the camera being for measuring coordinates of the weld.

According to the technical scheme, the coordinates of the welding line are measured through the camera, so that milling positioning of the milling part is facilitated, accuracy of milling the welding line is improved, and reliability of the battery is improved.

In some embodiments, the camera includes a first camera and a second camera, the first camera being fixed in position and the second camera being movable relative to the first camera to adjust a distance between the first camera and the second camera.

According to the technical scheme, the first camera and the second camera can be moved relatively, so that different battery monomer groups can be adapted conveniently, and the applicability of the milling device is improved.

In some embodiments, the dust cap is further provided with a negative pressure conduit in communication with the receiving cavity.

According to the technical scheme, the negative pressure pipeline is communicated with the accommodating cavity of the dust cover, so that scraps generated by milling welding seams are sucked away, the risks that scraps splash out to damage the battery cells are reduced, and the reliability of the battery is improved.

In some embodiments, the milling device includes a second drive assembly and a third drive assembly. The second driving assembly comprises a third driving piece and a third moving piece, the third driving piece is connected with the third moving piece to drive the third moving piece to move along a third direction, and the first driving piece is arranged on the third moving piece. The third driving assembly comprises a fourth driving piece and a fourth moving piece, the fourth driving piece is connected with the fourth moving piece to drive the fourth moving piece to move along the fourth direction, and the third driving piece is arranged on the fourth moving piece. Wherein the first direction, the third direction and the fourth direction are perpendicular to each other.

According to the technical scheme, the first driving piece is driven to move along the third direction through the third driving piece, namely the milling piece and the dust cover are driven to move along the third direction through the third driving piece; the third driving piece is driven to move along the fourth direction through the fourth driving piece, namely the milling piece and the dust cover are driven to move along the fourth direction through the fourth driving piece, so that different battery monomer groups can be conveniently adapted, and the applicability of the milling device is improved.

The application also provides a battery production line, which comprises the milling device of any embodiment.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a milling device according to some embodiments of the present disclosure;

FIG. 2 is a schematic view of another perspective of a milling device in some embodiments of the present application;

FIG. 3 is a schematic view of a milling device milling a weld provided in some embodiments of the present application;

FIG. 4 is an exploded view of a battery provided in some embodiments of the present application;

FIG. 5 is an exploded view of a battery cell according to some embodiments of the present application;

FIG. 6 is a schematic view of the dust cap of FIG. 1;

FIG. 7 is a schematic view of a hold-down mechanism provided by some embodiments;

FIG. 8 is a schematic view of a hold-down mechanism provided by other embodiments;

fig. 9 is an enlarged view at B in fig. 8.

Icon: 1-a milling device; 10-a dust cover; 11-a receiving cavity; 12-a first opening; 13-a first wall; 14-a negative pressure pipeline; 20-milling part; 30-a first drive assembly; 31-a first driving member; 32-a first mover; 40-a compressing mechanism; 41-a second driving member; 42-a second mover; 43-elastic member; 44-a first securing member; 45-connecting piece; 451-first connection portions; 452-a second connection; 46-a second fixing member; 461-via holes; 47-displacement sensor; 48-a controller; 49-limiting piece; 50-profiler; 60-a camera; 61-a first camera; 62-a second camera; 70-a second drive assembly; 71-a third driving member; 72-a third mover; 80-a third drive assembly; 81-fourth driving member; 82-fourth moving member; 100-battery cells; 110-a housing; 111-a housing; 112-end caps; 120-electrode assembly; 130-electrode terminals; 1000-cell; 1100-a box body; 1110-a first sub-enclosure; 1120-a second sub-tank; 1200-bar; 1210-weld; x-a first direction; a-a second direction; y-third direction; z-fourth direction.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases 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. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, D and/or E may indicate: d alone, D and E together, and E alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

The term "plurality" as used herein refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

In some embodiments, the battery may be a battery module, and when there are a plurality of battery cells, the plurality of battery cells are arranged and fixed to form one battery module.

In some embodiments, the battery may be a battery pack including a case and a battery cell, the battery cell or battery module being housed in the case.

In some embodiments, the tank may be part of the chassis structure of the vehicle. For example, a portion of the tank may become at least a portion of the floor of the vehicle, or a portion of the tank may become at least a portion of the cross member and the side member of the vehicle.

In some embodiments, the battery may be an energy storage device. The energy storage device comprises an energy storage container, an energy storage electric cabinet and the like.

In this embodiment of the present application, the battery cell may be a secondary battery, and the secondary battery refers to a battery cell that can activate the active material by charging after discharging the battery cell and continue to use.

The battery cell may be, but is not limited to, a lithium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, and the like.

As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shaped battery cell, and the prismatic battery cell includes a square-case battery cell, a blade-shaped battery cell, a polygonal-prism battery cell, such as a hexagonal-prism battery cell, etc., and the embodiments of the present application are not particularly limited.

The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge of the battery cell, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, can play a role in preventing the positive electrode and the negative electrode from being short-circuited, and can enable active ions to pass through.

In some embodiments, the battery cell may include a housing. The case is used to encapsulate the electrode assembly, the electrolyte, and the like. The shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), an aluminum-plastic film or the like.

In some embodiments, the case includes an end cap and a case, the case is provided with a first opening, and the end cap closes the first opening to form a closed space for accommodating the electrode assembly, the electrolyte, and the like. The housing may be provided with one or more first openings. One or more end caps may also be provided.

In some embodiments, at least one electrode terminal is provided on the case, and the electrode terminal is electrically connected with the tab of the electrode assembly. The electrode terminal may be directly connected to the tab, or may be indirectly connected to the tab through the adapter. The electrode terminal may be provided on the terminal cover or may be provided on the case.

In some embodiments, an explosion proof valve is provided on the housing. The explosion-proof valve is used for discharging the internal pressure of the battery cell.

Currently, from the development of market situation, batteries have been widely used in electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and various fields such as electric tools, unmanned aerial vehicles, and energy storage devices. With the continuous expansion of the field of battery use, the market demand is also continuously expanding.

The development of battery technology has been accompanied by consideration of various design factors such as energy density, cycle life, discharge capacity, charge-discharge rate, and other performance parameters, and, in addition, as environmental conditions and/or internal conditions of the battery change, reliability of the battery is one of the important factors.

At present, when a plurality of battery cells jointly form a battery cell group, welding is required to be performed between the tabs and electrode terminals of the battery cells, so that electrical connection among the battery cells is realized. When the tabs are welded with the battery cells, welding seams or welding marks are generated on the surfaces, far away from the battery cells, of the tabs.

In order to reduce the risk of the weld protruding from the surface of the tab interfering with other components, such as with the battery management system, the height of the weld is typically milled by a milling cutter, thereby enabling the battery cells to be assembled normally to form a battery cell stack.

However, during milling of the weld, the milled weld tends to produce debris, which can easily damage the battery cells, thereby affecting the reliability of the battery.

Based on the above-mentioned consideration, in order to solve the problem that the reliability of the battery is low, the embodiment of the application provides a milling device, and the milling device includes a dust cover and a milling piece. The milling part is arranged in the dust cover and is used for milling the welding seam. Wherein the dust cap is configured to cap the milling element with the weld when the milling element mills the weld.

The milling part and the welding line are covered by the dust cover when the welding line is milled, so that the probability of splashing scraps generated when the welding line is milled is reduced, the risk of damaging the battery monomer by the scraps is reduced, and the reliability of the battery is improved.

The milling device disclosed by the embodiment of the application can be used for but not limited to welding seams of the battery tabs and electrode terminals, and can also be used for milling welding seams generated by welding at other parts of the battery or in other fields.

The embodiment of the application provides a battery production line comprising a milling device, which can be used for various procedures of battery production, such as forming battery cells by an electrode assembly, forming a battery by assembling the battery cells, and the like.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a milling device according to some embodiments of the present application, fig. 2 is a schematic diagram of another view of the milling device according to some embodiments of the present application, and fig. 3 is a schematic diagram of a milling weld of the milling device according to some embodiments of the present application. The milling cutter of the milling part in fig. 3 is arranged in the dust cover, and the power transmission part is connected with the milling part and is used for being connected with an external power device.

Some embodiments of the present application provide a milling device 1 for milling a weld 1210 of a battery cell 100 group, the milling device 1 comprising a dust cap 10 and a milling member 20. A milling member 20 is arranged within the dust cap 10, the milling member 20 being used for milling the weld 1210. Wherein the dust cap 10 is configured to cap the milling element 20 with the weld 1210 when the milling element 20 mills the weld 1210.

In some embodiments, the battery cell 100 may be formed by assembling a plurality of battery cells 100 together, and the battery cell 100 may be a battery 1000 or a battery 1000 module, and the plurality of battery 1000 modules may form the battery 1000 together.

Referring to fig. 4, fig. 4 is an exploded view of a battery according to some embodiments of the present application. The battery 1000 may further include a case 1100, and the battery cell 100 is accommodated in the case 1100. The case 1100 is used to provide an accommodating space for the battery cell 100, and the case 1100 may have various structures. In some embodiments, the case 1100 may include a first sub-case 1110 and a second sub-case 1120, the first sub-case 1110 and the second sub-case 1120 being overlapped with each other, the first sub-case 1110 and the second sub-case 1120 together defining an accommodating space for accommodating the battery cell 100. The second sub-housing 1120 may have a hollow structure with an opening at one end, the first sub-housing 1110 may have a plate-shaped structure, and the first sub-housing 1110 covers the opening side of the second sub-housing 1120, so that the first sub-housing 1110 and the second sub-housing 1120 together define an accommodating space; the first sub-tank 1110 and the second sub-tank 1120 may be hollow structures each having one side opened, and the opening side of the first sub-tank 1110 is closed to the opening side of the second sub-tank 1120.

In the battery 1000, the number of the battery cells 100 may be plural, and the plural battery cells 100 may be connected in series, parallel, or series-parallel, where series-parallel refers to both of the plural battery cells 100 being connected in series and parallel. The plurality of battery cells 100 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 100 is accommodated in the box 1100; of course, the battery 1000 may be a form of a plurality of battery cells 100 connected in series or parallel or series-parallel to form a battery 1000 module, and a plurality of battery 1000 modules connected in series or parallel or series-parallel to form a whole and accommodated in the case 1100. The battery 1000 may also include other structures, for example, the battery 1000 may also include a bus bar member, i.e., a tab 1200, for making electrical connection between the plurality of battery cells 100. The battery cells 100 include electrode terminals 130, and the electrode terminals 130 of the plurality of battery cells 100 are connected through tabs 1200 to electrically connect the plurality of battery cells 100.

The battery cell 100 may be a secondary battery 1000 or a primary battery 1000; the battery cell 100 may also be a lithium sulfur battery 1000, a sodium ion battery 1000, or a magnesium ion battery 1000, but is not limited thereto.

Referring to fig. 5, fig. 5 is an exploded view of a battery cell according to some embodiments of the present disclosure. As shown in fig. 5, the battery cell 100 includes a case 110, an electrode assembly 120, and an electrode terminal 130. The case 110 includes a case 111 having an opening and an end cap 112, and the end cap 112 closes the opening to isolate the inner environment of the battery cell 100 from the outer environment.

The case 111 is an assembly for mating with the end cap 112 to form an internal environment of the battery cell 100, wherein the formed internal environment may be used to house the electrode assembly 120, electrolyte, and other components. The housing 111 and the end cap 112 may be separate components. The housing 111 may be a variety of shapes and sizes. Specifically, the shape of the case 111 may be determined according to the specific shape and size of the electrode assembly 120. The material of the housing 111 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. Wherein the housing 111 may be formed by a bottom wall and a side wall together.

The end cap 112 refers to a member that is covered at the opening of the case 111 to isolate the internal environment of the battery cell 100 from the external environment. Without limitation, the shape of the end cap 112 may be adapted to the shape of the housing 111 to fit the housing 111. Alternatively, the end cap 112 may be made of a material having a certain hardness and strength (such as an aluminum alloy), so that the end cap 112 is not easy to deform when being extruded and collided, so that the battery cell 100 can have a higher structural strength, and the reliability can be improved. The end cap 112 may be provided with functional parts such as electrode terminals 130. The electrode terminal 130 may be used to be electrically connected with the electrode assembly 120 for outputting or inputting electric power of the battery cell 100. The material of the end cap 112 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiments of the present application. In some embodiments, an insulating structure may also be provided on the inside of the end cap 112, which may be used to isolate electrical connection components within the housing 111 from the end cap 112 to reduce the risk of short circuits. By way of example, the insulating structure may be plastic, rubber, or the like.

The electrode assembly 120 is a component in which electrochemical reactions occur in the battery cell 100. One or more electrode assemblies 120 may be contained within the case 111. The electrode assembly 120 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally disposed between the positive electrode sheet and the negative electrode sheet, and is used for separating the positive electrode sheet and the negative electrode sheet so as to avoid an internal short circuit between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode sheets having active material constitute the main body portion of the electrode assembly 120, and the portions of the positive and negative electrode sheets having no active material constitute the tabs, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively.

In some embodiments, the weld 1210 of the battery cell 100 group may be a weld 1210 or a weld formed by welding the electrode terminals 130 of the battery cells 100 and the tabs 1200 when forming the battery cell 100 group for a plurality of battery cells 100.

In some embodiments, the tab 1200 is welded with the electrode terminal 130 to form a weld 1210, the weld 1210 generally protruding from the surface of the tab 1200 remote from the cell 100. The milling member 20 may mill the weld 1210 protruding from the surface of the tab 1200 remote from the battery cell 100 to within a set size, or may remove all of the weld 1210 protruding from the surface of the tab 1200 remote from the battery cell 100.

In some embodiments, the milling element 20 may be coupled to an external motor that rotates the milling element 20 to complete the milling of the weld 1210.

In some embodiments, the milling element 20 may be fixedly connected with the dust cap 10, and the milling element 20 is disposed within the dust cap 10.

In some embodiments, when the milling member 20 mills the weld 1210, the dust cap 10 covers the milling member 20 with the weld 1210, i.e., the milling member 20 covers the milling member 20 and the portion of the weld 1210 to be milled inside the dust cap 10 to reduce the splashing of debris generated when milling the weld 1210.

According to the technical scheme, the welding seam 1210 in the battery monomer 100 group is milled through the milling part 20, the risk that the welding seam 1210 interferes with other components in the battery monomer 100 group during assembly is reduced, meanwhile, the milling part 20 and the welding seam 1210 are covered by the dust cover 10 during milling of the welding seam 1210, so that the probability of chip splashing during milling of the welding seam 1210 is reduced, the risk that the chip damages the battery monomer 100 is reduced, and the reliability of the battery 1000 is improved.

Referring to fig. 1 to 5 and fig. 6, fig. 6 is a schematic structural diagram of the dust cap in fig. 1. In some embodiments, the dust cap 10 has a receiving cavity 11 and a first opening 12, the first opening 12 being in communication with the receiving cavity 11, the milling element 20 being disposed in the receiving cavity 11, the first opening 12 being configured for the weld 1210 to enter the receiving cavity 11.

In some embodiments, the dust cap 10 may be a rectangular parallelepiped structure, wherein the dust cap 10 has a receiving cavity 11 and a first opening 12 is provided in one wall.

In some embodiments, the dust cover 10 may have a rectangular parallelepiped structure, where the dust cover 10 may have only five walls, that is, four walls are surrounded by one wall, one end of each of the four walls is connected to the remaining one wall, and the other ends of the four walls collectively define the first opening 12.

In some embodiments, the milling part 20 may be connected to an output shaft of a motor, where the output shaft of the motor penetrates through a wall of the dust cover 10 so that the milling part 20 is disposed in the accommodating cavity 11, and the wall where the first opening 12 is located and the wall where the output shaft of the motor penetrates may be different walls.

In some embodiments, when milling the weld 1210 with the milling member 20, the size of the first opening 12 may be larger than the size of the weld 1210 such that the weld 1210 can enter the receiving cavity 11 through the first opening 12, thereby enabling the dust cap 10 to be covered over the weld 1210 and the milling member 20.

According to the technical scheme, the milling part 20 is arranged in the accommodating cavity 11, and meanwhile the welding seam 1210 is supplied to the accommodating cavity 11 through the first opening 12, so that the probability of splashing scraps generated during milling of the welding seam 1210 is reduced, the risk of damaging the battery cell 100 by the scraps is reduced, and the reliability of the battery 1000 is improved.

Referring to fig. 1 to 6, in some embodiments, the dust cover 10 has a first wall 13, the first opening 12 is disposed on the first wall 13, and the first wall 13 is used to abut against the battery cell 100.

In some embodiments, the first opening 12 is provided in the first wall 13, and when the milling member 20 mills the weld 1210, the weld 1210 enters the receiving cavity 11 through the first opening 12, i.e. the dust cover 10 covers the weld 1210.

In some embodiments, the first wall 13 may abut the battery cell 100, that is, the first wall 13 may abut the surface of the tab 1200 remote from the electrode terminal 130, such that after the weld 1210 enters the receiving cavity 11 through the first opening 12, the surface of the tab 1200 and the first wall 13 fit together to close the first opening 12, thereby reducing the probability of chips generated during milling being splashed out of the first opening 12.

According to the technical scheme, the first wall 13 of the dust cover 10 is abutted with the battery monomer 100 group, when the welding seam 1210 is covered by the dust cover 10, the first wall 13 is abutted with the battery monomer 100 group, the probability of splashing scraps generated during milling the welding seam 1210 is further reduced, and therefore the risk of damaging the battery monomer 100 by the scraps is reduced, and the reliability of the battery 1000 is improved.

Referring to fig. 1 and 5, in some embodiments, the milling device 1 includes a first driving assembly 30, the first driving assembly 30 includes a first driving member 31 and a first moving member 32, and the first driving member 31 is connected to the first moving member 32 to drive the first moving member 32 to move along a first direction X. The dust cover 10 is connected to the first moving member 32, so as to be close to or far from the weld 1210 along the first direction X under the driving of the first moving member 32.

In some embodiments, the first direction X may be represented by the direction indicated by the letter X in the figure. The first direction X may be a vertical direction.

In some embodiments, the weld 1210 may be spaced apart from the dust cap 10 or the milling member 20 in the first direction X before the milling member 20 mills the weld 1210, and the first wall 13 may be a wall surface of the dust cap 10 facing the weld 1210 in the first direction X.

In some embodiments, the first driver 31 may be a servo motor.

In some embodiments, the first moving member 32 may be a plate, the dust cover 10 is connected to the first moving member 32, and the milling member 20 is disposed in the dust cover 10, that is, both the milling member 20 and the dust cover 10 may be driven by the first moving member 32 to move along the first direction X.

In some embodiments, when it is desired that milling element 20 mill weld 1210, first moving element 32 moves dust cap 10 and milling element 20 in first direction X proximate weld 1210. After milling of the milling element 20 is completed, the first mover 32 moves the dust cap 10 and the milling element 20 away from the weld 1210 in the first direction X.

In some embodiments, the sizes of the groups of different types of battery cells 100 in the first direction X may be different, or the sizes of the weld seams 1210 of the groups of the same type of battery cells 100 in the first direction X may be different, and the milling device 1 may drive the milling member 20 and the dust cover 10 to move by the first driving assembly 30, so as to adapt to the different weld seams 1210.

According to the technical scheme, the dust cover 10 is connected to the first moving part 32, the first driving part 31 is connected with the first moving part 32 to drive the dust cover 10 to be close to the welding seam 1210 along the first direction X, convenience of the welding seam 1210 covered by the dust cover 10 is improved, automation is improved, and meanwhile the dust cover 10 is convenient to move so as to adapt to different battery monomer 100 groups.

Referring to fig. 1 to 6, and referring to fig. 7 to 9, fig. 7 is a schematic diagram of a pressing mechanism provided in some embodiments, fig. 8 is a schematic diagram of a pressing mechanism provided in other embodiments, and fig. 9 is an enlarged view at B in fig. 8. The negative pressure pipeline is hidden in fig. 8 and 9 so as to show the milling part in the dust cover, and the through hole of the second fixing part and the part penetrating through the second connecting part of the second fixing part in fig. 9 are shown by dotted lines. In some embodiments, the milling device 1 further comprises a compression mechanism 40, the dust cap 10 being connected to the first movable member 32 by the compression mechanism 40, the compression mechanism 40 being configured to provide the dust cap 10 with a compression force compressing the set of battery cells 100 and to control the compression force within a first pressure range.

When the milling piece 20 mills the welding seam 1210, in order to reduce the probability that scraps generated by milling the welding seam 1210 are splashed out through the first opening 12, the dust cover 10 can be pressed against the battery cell 100 group, so that the first wall 13 of the dust cover 10 is abutted against the bar 1200 of the battery cell 100 group, the first opening 12 is closed, and meanwhile, the probability that the milling piece 20 and the battery cell 100 group shake when the milling piece 20 mills the welding seam 1210 can be reduced, and the risk of inaccurate milling positioning is reduced.

However, when the dust cover 10 presses the battery cell 100 group, the pressing force pressing the battery cell 100 group is not easily controlled, and there is a risk of crushing the battery cell 100 group, thereby affecting the reliability of the battery 1000.

In some embodiments, the milling device 1 comprises a hold-down mechanism 40, the hold-down mechanism 40 being connected to the dust cap 10, thereby providing the dust cap 10 with a hold-down force for holding down the battery cell 100 group, the hold-down force being controlled within a first pressure range, thereby reducing the risk of damaging the battery cell 100 group.

According to the technical scheme, the pressing force for pressing the battery monomer 100 group is provided for the dust cover 10 through the pressing mechanism 40, so that the risk that the dust cover 10 presses the battery monomer 100 group to damage the battery monomer 100 group is reduced, and the reliability of the battery 1000 is improved.

In some embodiments, the first pressure range is 0 to 400N.

In some embodiments, the compression force of the dust cap 10 against the group of battery cells 100 may be 50N, 100N, 150N, 200N, 250N, 300N, 350N, 400N, etc.

It should be noted that, in an ideal situation, the pressing force of the dust cover 10 pressing the battery cell 100 set may be 0, that is, the dust cover 10 just contacts the battery cell 100 set, and there is no pressing force pressing the battery cell 100 set, and also just closes the first opening 12.

According to the technical scheme, the pressing force is controlled in the first pressure range, the first pressure range meets the conditions, the risk that the dust cover 10 presses the battery monomer 100 group to damage the battery monomer 100 group is reduced, and the reliability of the battery 1000 is improved.

In some embodiments, the first pressure range is 150N-400N.

In some embodiments, the compression force of the dust cap 10 against the group of battery cells 100 may be 150N, 170N, 190N, 210N, 230N, 250N, 270N, 290N, 310N, 330N, 350N, 370N, 390N, 400N, etc.

According to the technical scheme, the first pressure range meets the conditions, the risk that the dust cover 10 compresses the battery monomer 100 group to damage the battery monomer 100 group is further reduced, and the reliability of the battery 1000 is improved.

Referring to fig. 1 to 7, in some embodiments, the pressing mechanism 40 includes a second driving member 41 and a second moving member 42, the second driving member 41 is connected to the first moving member 32, and the second driving member 41 is connected to the second moving member 42 to drive the second moving member 42 to move along the first direction X. The dust cover 10 is disposed on the second moving member 42, so as to be driven by the second moving member 42 to approach or separate from the weld 1210 along the first direction X.

In some embodiments, the driving force of the second driving member 41 may satisfy the above-described first pressure range, that is, the maximum driving force of the second driving member 41 may not exceed 400N.

In some embodiments, the second driver 41 may be a thin cylinder.

In some embodiments, the second moving member 42 may be a plate, the first moving member 32 may be a plate disposed along the first direction X, and the second moving member 42 may be movably disposed on the first moving member 32.

In some embodiments, the dust cap 10 and the milling member 20 may be disposed on the second moving member 42, before the welding seam 1210 is milled, the milling member 20 and the dust cap 10 are spaced apart from the welding seam 1210 in the first direction X, the first driving member 31 drives the first moving member 32 to move so as to approach the welding seam 1210 in the first direction X, the first moving member 32 drives the second moving member 42 to move synchronously, and the second moving member 42 drives the dust cap 10 and the milling member 20 to move synchronously, so as to realize adjustment of the milling member 20 and the dust cap 10 in the first direction X, and at this time, the dust cap 10 is not abutted with the battery cell 100.

In some embodiments, after the first driving assembly 30 is completed, the second driving member 41 drives the second moving member 42 to move in the first direction X, and the second moving member 42 drives the dust cover 10 and the milling member 20 to synchronously move in the first direction X, so as to approach the welding seam 1210, so that the dust cover 10 abuts against the battery cell 100.

In some embodiments, a guide rail extending in the first direction X may be provided on the first moving member 32, and the second moving member 42 may be provided on the guide rail, and the second driving member 41 drives the second moving member 42 to move along the extending direction of the guide rail, so that the movement of the second moving member 42 in the first direction X is smoother.

According to the technical scheme, the dust cover 10 is arranged on the second moving part 42, the second driving part 41 is connected with the second moving part 42 to drive the dust cover 10 to approach or separate from the welding seam 1210 along the first direction X, the pressing force for pressing the battery monomer 100 group is controlled through the second driving part 41, the risk that the dust cover 10 presses the battery monomer 100 group to damage the battery monomer 100 group is reduced, and the reliability of the battery 1000 is improved.

In some embodiments, the maximum driving force of the second driving member 41 is less than the maximum driving force of the first driving member 31.

In some embodiments, the first driving member 31 drives the first moving member 32 to displace the milling member 20 and the dust cap 10 in the first direction X, where the dust cap 10 is not yet in contact with the battery cell 100, so that the driving force of the first driving member 31 may be greater to improve the efficiency of the movement.

In some embodiments, the second driving member 41 drives the second moving member 42 to effect displacement of the milling member 20 and the dust cap 10 in the first direction X such that the dust cap 10 is in contact with the battery cell 100 set, so that the driving force of the second driving member 41 may be controlled within the first pressure range to reduce the risk of damaging the battery cell 100 set by the dust cap 10.

According to the technical scheme, the maximum driving force of the second driving piece 41 is smaller than that of the first driving piece 31, so that the risk that the second driving piece 41 drives the dust cover 10 to move to crush the battery cell 100 group is reduced, and the first driving piece 31 is convenient to drive the dust cover 10 to move to adapt to different battery cell 100 groups.

Referring to fig. 1 to 7, in some embodiments, the milling member 20 is disposed on the second moving member 42, so as to be driven by the second moving member 42 to approach or separate from the weld 1210 along the first direction X.

In some embodiments, the milling element 20 may be disposed on the second moveable member 42, with the milling element 20 being moved in synchronism with the dust cap 10 such that the milling element 20 is disposed within the dust cap 10 at all times.

In some embodiments, the milling element 20 is disposed on the second moving element 42, so that the milling element 20 is driven by the second moving element 42 to move along the first direction X, thereby adjusting the relative position of the milling element 20 and the weld 1210.

According to the technical scheme of the embodiment, the second moving member 42 drives the milling member 20 to approach or depart from the welding seam 1210 along the first direction X, so that the milling member 20 is convenient to mill the welding seam 1210, and meanwhile, the welding seam 1210 of different battery cell 100 groups is convenient to adapt.

Referring to fig. 1 to 6, fig. 8 and fig. 9, in some embodiments, the pressing mechanism 40 includes an elastic member 43 and a first fixing member 44, the first fixing member 44 is disposed on the first moving member 32, one end of the elastic member 43 is connected to the dust cover 10, the other end is connected to the first fixing member 44, and the elastic member 43 is configured to provide a pressing force for pressing the battery cell 100 set on the dust cover 10 when the milling member 20 moves to a preset position.

In some embodiments, the hold-down mechanism 40 may include an elastic member 43 and a first securing member 44. One end of the elastic member 43 in the first direction X may be connected to the dust cover 10, and the other end may be connected to the first fixing member 44, where the first fixing member 44 is disposed on the first moving member 32, that is, the first moving member 32 moves along the first direction X, so as to drive the elastic member 43, the first fixing member 44 and the dust cover 10 to move together.

In some embodiments, the elastic member 43 may be disposed along the first direction X, and the elastic member 43 may be a spring.

In some embodiments, the first direction X may be a vertical direction, and the battery cell 100 group may be disposed under the dust cover 10. The lower end of the elastic member 43 may be connected with the dust cap 10, and the upper end of the elastic member 43 may be connected with the first fixing member 44. The first fixing member 44 may be a plate member disposed in a horizontal direction.

In some embodiments, the first driving member 31 may drive the first moving member 32 to move along the first direction X near the battery cell 100 set, and the dust cover 10 is driven by the first moving member 32 to move along the first direction X near the battery cell 100 set until the dust cover 10 abuts against the bar 1200. At this time, the first moving member 32 continues to move along the first direction X near the battery cell 100, that is, the elastic member 43 and the first fixing member 44 move along the first direction X near the battery cell 100, so that the dust cover 10 abuts against the bar 1200, and the position is unchanged, so that the elastic member 43 is compressed to buffer the pressing force of pressing the battery cell 100.

According to the technical scheme, one end of the elastic piece 43 is connected with the first fixing piece 44, the other end of the elastic piece is connected with the dust cover 10, and elastic force is provided through the elastic piece 43 so as to slow down the pressing force of the dust cover 10 on the battery unit 100 group, so that the risk that the dust cover 10 presses the battery unit 100 group is reduced, and the reliability of the battery 1000 is improved.

Referring to fig. 1 to 6, fig. 8 and fig. 9, in some embodiments, in the second direction a, the elastic member 43 and the dust cover 10 are disposed at intervals, the pressing mechanism 40 further includes a connecting member 45, and the dust cover 10 is connected to one end of the elastic member 43 through the connecting member 45, where the first direction X and the second direction a intersect.

In some embodiments, the second direction a may be represented by the direction indicated by the letter a in the figure. Wherein the first direction X and the second direction a may be perpendicular. The first direction X may be a vertical direction and the second direction a may be a horizontal direction.

In some embodiments, the resilient member 43 and the dust cap 10 are spaced apart in the second direction a due to spatial arrangement or dimensional issues with the dust cap 10. The elastic member 43 and the dust cap 10 are connected by the connection member 45, and when the dust cap 10 presses the battery cell 100 group, the dust cap 10 compresses the elastic member 43 by the connection member 45.

According to the technical scheme, the connecting piece 45 is connected with the elastic piece 43 and the dust cover 10, so that the elastic piece 43 is connected with the dust cover 10, the risk that the dust cover 10 crushes the battery unit 100 sets is reduced through the elastic piece 43, and the reliability of the battery 1000 is improved.

Referring to fig. 1 to 6, fig. 8 and 9, in some embodiments, the pressing mechanism 40 further includes a second fixing member 46, the second fixing member 46 and the first fixing member 44 are spaced apart in the first direction X, the second fixing member 46 has a through hole 461, and the through hole 461 penetrates through two surfaces of the second fixing member 46 in the first direction X. The connector 45 has a first connecting portion 451 and a second connecting portion 452, the first connecting portion 451 is located between the first fixing member 44 and the second fixing member 46 and connected to the elastic member 43, one end of the second connecting portion 452 is inserted through the through hole 461 to be connected to the first connecting portion 451, the other end is connected to the dust cover 10, and in the first direction X, the projection of the first connecting portion 451 covers the projection of the through hole 461.

In some embodiments, the second fixing member 46 is spaced apart from the first fixing member 44, and the first connection portion 451 is disposed between the first fixing member 44 and the second fixing member 46. The first direction X may be a vertical direction, and the first fixing member 44, the second fixing member 46, and the first connection portion 451 may be plate members disposed in a horizontal direction.

In some embodiments, the first connection portion 451 may abut against the second fixing member 46 when the elastic member 43 is in a normal state, i.e. when the elastic member 43 is not deformed.

In some embodiments, the second connection portion 452 may be a rod-shaped member or a column-shaped member, and a portion of the second connection portion 452 may extend along the first direction X, and may be connected to the first connection portion 451 while penetrating the via 461 of the second fixing member 46.

In some embodiments, in the first direction X, the projection of the first connection portion 451 covers the projection of the via 461, i.e. the size of the first connection portion 451 is larger than the size of the via 461, such that the first connection portion 451 is always located between the first fixing member 44 and the second fixing member 46.

According to the technical scheme of the embodiment of the application, the second fixing piece 46 is provided with the through hole 461 for the second connecting portion 452 to pass through, so that the connecting piece 45 is convenient to connect with the elastic piece 43. Meanwhile, in the first direction X, the projection of the first connection portion 451 covers the projection of the via 461, so that the second fixing member 46 supports the first connection portion 451, thereby improving the stability of the pressing mechanism 40.

Referring to fig. 1 to 6, 8 and 9, in some embodiments, the pressing mechanism 40 further includes a displacement sensor 47 and a controller 48, the controller 48 is electrically connected to the displacement sensor 47 and the first driving member 31, the displacement sensor 47 is used for detecting a deformation amount of the elastic member 43, and the controller 48 is configured to close the first driving member 31 when the deformation amount detected by the displacement sensor 47 exceeds a set value.

In some embodiments, the pressing mechanism 40 further includes a displacement sensor 47 and a controller 48, where the displacement sensor 47 is configured to detect a deformation amount of the elastic member 43, and the deformation amount of the elastic member 43 is used to derive a force for compressing or stretching the elastic member 43, that is, a pressing force of the dust cover 10 for pressing the battery cell 100 set.

In some embodiments, when the deformation amount of the elastic member 43 detected by the displacement sensor 47 exceeds a set value, that is, the pressing force exceeds the first pressure range, the controller 48 is electrically connected to the first driving member 31, thereby closing the first driving member 31.

In some embodiments, the milling device 1 may also be operated manually, by which the first driver 31 is turned off manually when it is observed that the deformation of the elastic member 43 detected by the displacement sensor 47 exceeds a set value.

According to the technical scheme, the displacement sensor 47 detects the deformation of the elastic piece 43, when the detected deformation exceeds a set value, the first driving piece 31 is closed through the controller 48, so that the pressing force of the dust cover 10 for pressing the battery cell 100 group is controlled, the risk of the dust cover 10 for pressing the battery cell 100 group is reduced, and the reliability of the battery 1000 is improved.

Referring to fig. 1 to 6, 8 and 9, in some embodiments, the pressing mechanism 40 further includes a limiting member 49 and a controller 48, the limiting member 49 is disposed on the first fixing member 44, the limiting member 49 is electrically connected to the controller 48 and the first driving member 31, and the controller 48 is configured to close the first driving member 31 when the limiting member 49 abuts against the connecting member 45.

In some embodiments, the stop 49 may be a post extending in the first direction X, with the stop 49 being attached to a surface of the first mount 44 facing the second mount 46.

In some embodiments, the limiter 49 is a set distance from the dust cap 10 when the dust cap 10 has not yet contacted the battery cell 100 stack. When the dust cover 10 compresses the battery unit 100, the elastic member 43 is compressed, and the first fixing member 44 and the dust cover 10 approach each other, that is, the limiting member 49 and the dust cover 10 approach each other until the limiting member 49 abuts against the connecting member 45. That is, the compression size of the elastic member 43 is the same as the set distance between the stopper 49 and the dust cover 10, so as to limit the force of compressing the elastic member 43, that is, the pressing force of pressing the battery cell 100 group. The controller 48 is electrically connected to the first driving member 31 to turn off the first driving member 31.

In some embodiments, the milling device 1 may also be operated manually, by manually closing the first driver 31 when the abutment of the stop member 49 with the connector 45 is observed.

According to the technical scheme, when the elastic piece 43 deforms to enable the limiting piece 49 to be in butt joint with the connecting piece 45, the controller 48 closes the first driving piece 31, so that the dust cover 10 is controlled to compress the compression force of the battery unit 100 group, the risk that the dust cover 10 compresses the battery unit 100 group is reduced, and the reliability of the battery 1000 is improved.

Please refer to fig. 1 to 5. In some embodiments, the milling device 1 further comprises a profiler 50, the profiler 50 being connected to the first movement 32, the profiler 50 being adapted to detect the size of the weld 1210.

In some embodiments, the first direction X may be a vertical direction, and the profiler 50 is configured to detect a dimension of the weld 1210 in the first direction X, and a dimension of the profiler 50 in a horizontal direction, for feedback to the milling member 20 to facilitate the milling member 20 to mill the weld 1210.

According to the technical scheme, the dimension of the welding seam 1210 is detected through the profiler 50, so that the accuracy of milling the welding seam 1210 is improved, and the reliability of the battery 1000 is improved.

Referring to fig. 1 to 5, in some embodiments, the milling device 1 further includes a camera 60, the camera 60 is connected to the first moving member 32, and the camera 60 is used for measuring coordinates of the weld 1210.

In some embodiments, the camera 60 is coupled to the first mover 32, i.e., the camera 60 is movable in the first direction X.

In some embodiments, camera 60 is used to measure coordinates of weld 1210, i.e., three-dimensional coordinates of weld 1210, to facilitate mobile positioning of milling element 20.

According to the technical scheme, the coordinates of the welding seam 1210 are measured through the camera 60, so that the milling positioning of the milling part 20 is facilitated, the accuracy of milling the welding seam 1210 is improved, and the reliability of the battery 1000 is improved.

Referring to fig. 1 to 5, in some embodiments, the camera 60 includes a first camera 61 and a second camera 62, the first camera 61 is fixed in position, and the second camera 62 is movable relative to the first camera 61 to adjust a distance between the first camera 61 and the second camera 62.

In some embodiments, the tab 1200 may connect the electrode terminals 130 of two or more battery cells 100, for example, two battery cells 100. The first camera 61 corresponds to the electrode terminal 130 of one of the battery cells 100, and the second camera 62 corresponds to the electrode terminal 130 of the other battery cell 100.

In some embodiments, in different groups of battery cells 100, there may be a difference in the size of the battery cells 100, that is, the distance between the corresponding electrode terminals 130 of the tabs 1200 is different, that is, the positions of the weld 1210 generated by connecting the electrode terminals 130 with the tabs 1200 are different. Accordingly, the second camera 62 can be moved relative to the first camera 61 to adjust the distance between the first camera 61 and the second camera 62 to correspond to the welds 1210 of the different types of battery cell 100 groups.

According to the technical scheme, the first camera 61 and the second camera 62 are arranged to be capable of moving relatively, so that different battery monomer 100 groups can be conveniently adapted, and the applicability of the milling device 1 is improved.

Referring to fig. 1 to 6, in some embodiments, the dust cover 10 is further provided with a negative pressure pipe 14, and the negative pressure pipe 14 communicates with the accommodating cavity 11.

In some embodiments, one end of the negative pressure conduit 14 may be in communication with the receiving cavity 11 of the dust cap 10, and the other end may be connected to a negative pressure device or a suction device to provide a negative pressure to suck out debris generated by the milling weld 1210 from the negative pressure conduit 14.

According to the technical scheme, the negative pressure pipeline 14 is communicated with the accommodating cavity 11 of the dust cover 10, so that scraps generated by the milling weld 1210 are sucked away, the risk that scraps splash out to damage the battery cell 100 is reduced, and the reliability of the battery 1000 is improved.

Referring to fig. 1-5, in some embodiments, the milling device 1 includes a second drive assembly 70 and a third drive assembly 80. The second driving assembly 70 includes a third driving member 71 and a third moving member 72, the third driving member 71 is connected to the third moving member 72 to drive the third moving member 72 to move along the third direction Y, and the first driving member 31 is disposed on the third moving member 72. The third driving assembly 80 includes a fourth driving member 81 and a fourth moving member 82, the fourth driving member 81 is connected to the fourth moving member 82 to drive the fourth moving member 82 to move along the fourth direction Z, and the third driving member 71 is disposed on the fourth moving member 82. Wherein the first direction X, the third direction Y and the fourth direction Z are perpendicular to each other.

In some embodiments, the third direction Y may be represented by the direction indicated by the letter Y in the figure, and the fourth direction Z may be represented by the direction indicated by the letter Z in the figure. Wherein the first direction X, the third direction Y and the fourth direction Z are perpendicular to each other. The first direction X may be a vertical direction, and the third direction Y and the fourth direction Z may both be horizontal directions, wherein the third direction Y may be a length direction of the battery cell 100, and the fourth direction Z may be a width direction of the battery cell 100.

In some embodiments, the second direction a may be parallel to the third direction Y.

In some embodiments, the second direction a may be parallel to the fourth direction Z.

In some embodiments, the second driving assembly 70 includes a third driving member 71 and a third moving member 72, where the third driving member 71 drives the third moving member 72 to move along the third direction Y, the first driving member 31 is disposed on the third moving member 72, the first driving member 31 is connected to the first moving member 32, and the dust cover 10 and the milling member 20 are connected to the first moving member 32, that is, the third driving member 71 drives the dust cover 10 to move along the third direction Y.

In some embodiments, the third driving member 71 includes a fourth driving member 81 and a fourth moving member 82, the fourth driving member 81 drives the fourth moving member 82 to move along the fourth direction Z, the third driving member 71 is disposed on the fourth moving member 82, the first driving member 31 is disposed on the third moving member 72, the third driving member 71 is connected with the third moving member 72, the first driving member 31 is disposed on the third moving member 72, the first driving member 31 is connected with the first moving member 32, the dust cover 10 and the milling member 20 are connected with the first moving member 32, that is, the fourth driving member 81 drives the dust cover 10 to move along the fourth direction Z.

In some embodiments, the third drive 71 and the fourth drive 81 may each be a servo motor.

In some embodiments, the number of the first driving assemblies 30 may be two, and the two first driving assemblies 30 are respectively disposed at two sides of the third moving member 72 in the fourth direction Z. Wherein the dust cap 10 and the milling member 20 may be disposed at one side of the third moving member 72 in the fourth direction Z, and the camera 60 and the profiler 50 may be disposed at the other side of the third moving member 72 in the fourth direction Z.

In some embodiments, the number of the third driving assemblies 80 may be two, and both ends of the third moving member 72 in the third direction Y are connected to two fourth moving members 82, respectively.

According to the technical scheme, the third driving piece 71 drives the first driving piece 31 to move along the third direction Y, namely the third driving piece 71 drives the milling piece 20 and the dust cover 10 to move along the third direction Y; the fourth driving piece 81 drives the third driving piece 71 to move along the fourth direction Z, that is, the fourth driving piece 81 drives the milling piece 20 and the dust cover 10 to move along the fourth direction Z, so that different battery monomer 100 groups can be conveniently adapted, and the applicability of the milling device 1 is improved.

The present application also provides a battery production line comprising a milling device 1 according to any of the embodiments described above.

Referring to fig. 1-7, in some embodiments, a milling device 1 includes a dust cap 10 and a milling element 20. The dust cap 10 has a receiving chamber 11 and a first wall 13, the first wall 13 being provided with a first opening 12, the first opening 12 being in communication with the receiving chamber 11. When the milling member 20 mills the weld 1210, the first wall 13 abuts against the tabs 1200 of the battery cell 100 group, and the weld 1210 and the milling member 20 enter the housing cavity 11 through the first opening 12 to be covered by the dust cover 10.

In some embodiments, the milling device 1 includes a first driving member 31 and a first moving member 32, the dust cap 10 and the milling member 20 are connected to the first moving member 32, and the first driving member 31 drives the first moving member 32 to move along the first direction X, so as to drive the milling member 20 and the dust cap 10 to approach or separate from the weld 1210 along the first direction X.

In some embodiments, the milling device 1 further comprises a pressing mechanism 40, and the dust cover 10 is connected to the first moving member 32 through the pressing mechanism 40, so that the pressing force of the dust cover 10 to press the battery cell 100 set is controlled to be within the first pressure range through the pressing mechanism 40.

In some embodiments, the pressing mechanism 40 includes a second driving member 41 and a second moving member 42, where the dust cap 10 and the milling member 20 are connected to the second moving member 42, and the second driving member 41 drives the second moving member 42 to move along the first direction X, so as to drive the milling member 20 and the dust cap 10 to approach or separate from the weld 1210 along the first direction X. Wherein the driving force of the second driving member 41 does not exceed 400N.

According to the technical scheme, the milling part 20 and the welding seam 1210 are covered by the dust cover 10, the first wall 13 is abutted to the battery monomer 100 group, the probability of producing scraps splashing when the welding seam 1210 is reduced, so that the risk of scraps damaging the battery monomer 100 is reduced, meanwhile, the pressing force for pressing the battery monomer 100 group is provided for the dust cover 10 through the pressing mechanism 40, the risk of pressing the battery monomer 100 group by the dust cover 10 to damage the battery monomer 100 group is reduced, and the reliability of the battery 1000 is improved.

While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A milling device for milling a weld of a battery cell stack, comprising:

a dust cover having a receiving cavity and a first opening, the first opening in communication with the receiving cavity;

The milling part is arranged in the accommodating cavity and is used for milling the welding seam;

wherein the dust cover is configured to cover the milling part and the welding seam when the milling part mills the welding seam, and the first opening is configured for the welding seam to enter the accommodating cavity.

2. The milling device of claim 1, wherein the dust cap has a first wall, the first opening being provided in the first wall, the first wall being for abutment with the battery cell stack.

3. The milling device of any one of claims 1-2, wherein the milling device comprises a first drive assembly comprising a first drive member and a first displacement member, the first drive member being coupled to the first displacement member to drive the first displacement member to move in a first direction;

the dust cover is connected to the first moving part, so as to be close to or far away from the welding seam along the first direction under the drive of the first moving part.

4. A milling device according to claim 3, further comprising a hold-down mechanism, the dust cap being connected to the first movable member by the hold-down mechanism, the hold-down mechanism being configured to provide a hold-down force for the dust cap to hold down the battery cell stack and to control the hold-down force within a first pressure range.

5. The milling device of claim 4, wherein the hold-down mechanism comprises a second drive member and a second moving member, the second drive member being coupled to the first moving member, the second drive member being coupled to the second moving member to drive the second moving member to move in the first direction;

the dust cover is arranged on the second moving part and is driven by the second moving part to approach or depart from the welding seam along the first direction.

6. The milling device of claim 5, wherein the milling element is disposed on the second moving element to be moved by the second moving element to approach or separate from the weld seam in the first direction.

7. The milling device of claim 4, wherein the hold-down mechanism comprises an elastic member and a first fixing member, the first fixing member is disposed on the first moving member, one end of the elastic member is connected to the dust cap, the other end of the elastic member is connected to the first fixing member, and the elastic member is configured to provide a hold-down force for the dust cap to hold down the battery cell group when the milling member moves to a preset position.

8. The milling device of claim 7, wherein in a second direction, the resilient member and the dust cap are spaced apart, the hold-down mechanism further comprising a connector through which the dust cap is connected to one end of the resilient member, wherein the first direction and the second direction intersect.

9. The milling device of claim 8, wherein the hold down mechanism further comprises a second fixture spaced apart from the first fixture in the first direction, the second fixture having a via extending through both surfaces of the second fixture in the first direction;

the connecting piece has first connecting portion and second connecting portion, first connecting portion is located first mounting with between the second mounting and with the elastic component is connected, the one end of second connecting portion wear to locate the via hole in order to be connected with first connecting portion, the other end with the dust cover is connected in first direction, the projection of first connecting portion covers the projection of via hole.

10. The milling device according to any one of claims 8-9, wherein the hold-down mechanism further comprises a displacement sensor and a controller, the controller being electrically connected to the displacement sensor and the first driver, the displacement sensor being adapted to detect a deformation of the resilient member, the controller being configured to close the first driver when the deformation detected by the displacement sensor exceeds a set value.

11. The milling device of any one of claims 8-9, wherein the hold-down mechanism further comprises a stop member and a controller, the stop member being disposed on the first securing member, the stop member being electrically connected to the controller and the first driving member, the controller being configured to close the first driving member when the stop member abuts the connecting member.

12. A milling device according to claim 3, further comprising a profiler connected to the first displacement member, the profiler being adapted to detect the size of the weld.

13. A milling device according to claim 3, further comprising a camera connected to the first moving member, the camera being adapted to measure coordinates of the weld.

14. The milling device of claim 13, wherein the camera comprises a first camera and a second camera, the first camera being fixed in position and the second camera being movable relative to the first camera to adjust a distance between the first camera and the second camera.

15. The milling device according to claim 1, wherein the dust cap is further provided with a negative pressure conduit, which is in communication with the receiving cavity.

16. A milling device according to claim 3, characterized in that the milling device comprises:

the second driving assembly comprises a third driving piece and a third moving piece, the third driving piece is connected with the third moving piece to drive the third moving piece to move along a third direction, and the first driving piece is arranged on the third moving piece;

the third driving assembly comprises a fourth driving piece and a fourth moving piece, the fourth driving piece is connected with the fourth moving piece to drive the fourth moving piece to move along a fourth direction, and the third driving piece is arranged on the fourth moving piece;

wherein the first direction, the third direction and the fourth direction are perpendicular to each other.

17. A battery production line, characterized by comprising a milling device according to any one of claims 1 to 16.