CN216325930U - Protective cover and welding protection device - Google Patents

Abstract

The application provides a safety cover and welding protection device, belongs to the battery field of making. The protective cover comprises a protective cover body and a pressing piece. The safety cover body is provided with a welding port, a welding cavity and an opening which are communicated in sequence, the welding port is opposite to the opening, and the side wall of the welding cavity is provided with a mounting port communicated with the opening. The compressing piece is detachably connected to the mounting opening. During welding, the bus bar and the pole are compressed at the opening part of the protective cover through the compression piece, laser enters the welding cavity through the welding port, and the bus bar and the pole at the opening part are welded. When compressing tightly the piece and being damaged by laser ablation, will compress tightly the piece and remove from installing port department to install new piece that compresses tightly at the installing port position, avoided the change to whole safety cover, saved the replacement cost.

Description

Protective cover and welding protection device

Technical Field

The embodiment of the application relates to the field of battery manufacturing, in particular to a protective cover and a welding protection device.

Background

The power battery is a power source for providing power source for the tool, and is a storage battery for providing power for electric automobiles, electric trains, electric bicycles, golf carts and the like.

In the process of manufacturing a power battery, when a pole and a bus bar are welded, the pole and the bus bar are usually pressed tightly through a protective cover, and then the bus bar and the pole are welded through a laser.

When the existing protective cover is damaged, the whole protective cover needs to be replaced by a new protective cover, and the replacement cost is high.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the embodiment of the application provides a protection cover and a welding protection device, which can solve the problem that the replacement cost is high when the existing protection cover is damaged.

According to a first aspect of embodiments of the present application, a protective cover is provided. The protective cover comprises a protective cover body and a pressing piece. The safety cover body is provided with a welding port, a welding cavity and an opening which are communicated in sequence, the welding port is opposite to the opening, and the side wall of the welding cavity is provided with a mounting port communicated with the opening. And laser enters the welding cavity along the welding port to weld the busbar and the pole positioned at the opening. Compress tightly a detachably connection in installing port department, compress tightly the piece and be used for compressing tightly busbar and utmost point post when the welding.

In the technical scheme of this application, set up the installing port at the lateral wall in welding chamber, the lateral wall of safety cover body promptly to compress tightly a detachably and connect on the safety cover body. When the compressing member is damaged by laser ablation, the compressing member is detached from the mounting opening, and a new compressing member is connected to the mounting opening, so that the whole protective cover is prevented from being replaced, and the replacement cost is saved.

In some embodiments, the end of the compression member has a first securing structure. The end of the mounting opening is provided with a second fixing structure matched with the first fixing structure. The pressing piece is detachably connected with the protective cover body through a first fixing structure and a second fixing structure.

The end part of the pressing piece is provided with the first fixing structure, the end part of the mounting opening is provided with the second fixing structure, the pressing piece can be detachably connected to the mounting opening through the first fixing structure and the second fixing structure, so that the pressing piece is mounted at the mounting opening when welding is carried out, and the pressing piece is detached from the mounting opening when damaged due to laser ablation.

In some embodiments, the first fixing structure is a fixing strip, and the second fixing structure is a fixing base having a slot, and the slot is matched with the fixing strip.

The first fixing structure is arranged into a fixing strip, the second fixing structure is arranged into a fixing seat with a slot, and the fixing strip at the end part of the pressing piece can be inserted into the slot at the installation opening part of the protective cover body when the pressing piece is connected with the protective cover body; when the pressing piece is detached from the protective cover body, the fixing strip at the end part of the pressing piece is drawn out from the slot at the installation opening part of the protective cover body; the fixed strip can be convenient for compress tightly the piece and be connected and dismantle with the safety cover body with the cooperation mode of slot.

In some embodiments, the first securing structure is a male seam allowance and the second securing structure is a female seam allowance that mates with the male seam allowance.

The first fixing structure is set as a male spigot, the second fixing structure is set as a female spigot, and when the pressing piece and the protective cover body are connected, the male spigot at the end part of the pressing piece can be buckled with the female spigot at the mounting opening part of the protective cover body; when the pressing piece is detached from the protective cover body, the male spigot at the end part of the pressing piece is detached from the female spigot at the installation opening part of the protective cover body; the male spigot and the female spigot can be matched conveniently to enable the pressing piece to be connected with and detached from the protective cover body.

In some embodiments, the protective cover further comprises a fastener. The side surface of the first fixing structure is provided with a first slot hole, and the side surface of the second fixing structure is provided with a second slot hole opposite to the first slot hole. The fastener is inserted into the second slot and the first slot to fasten the protective cover body and the pressing piece.

Through setting up the fastener, can be after compressing tightly a piece and being connected with the safety cover, fix compressing tightly a piece and safety cover body to when compressing tightly a piece and compressing tightly busbar and utmost point post at the safety cover, reduce and compress tightly the displacement that the piece produced for the safety cover body, guarantee to compress tightly the packing force of a to busbar and utmost point post.

In some embodiments, the first slot and the second slot are both threaded holes, and the fastener is a bolt that fits into the threaded holes.

The first slotted hole and the second slotted hole are both arranged into threaded holes, the fastener is arranged into a bolt matched with the threaded holes, the pressing piece can be fixed with the protective cover body through the bolt, the firm degree of connection between the pressing piece and the protective cover body is improved, and the pressing force of the pressing piece on the busbar and the pole is guaranteed.

In some embodiments, the compression member is a compression plate that is removably coupled to the mounting opening by a first securing structure and a second securing structure.

Will compress tightly the piece and set up to the pressure strip, can be convenient for compress tightly the piece and be connected with dismantling of safety cover body. In addition, the structure that the setting of pressure strip can make the piece that compresses tightly is simpler, and manufacturing cost is lower, more is favorable to reducing the replacement cost of safety cover.

In some embodiments, the boot further comprises an air intake interface connected to the boot body. The gas inlet interface is communicated with the welding cavity so as to input protective gas into the welding cavity during welding.

Through setting up the interface that admits air, can be when the welding, introduce welding chamber with protective gas such as nitrogen gas, argon gas, make welding process accomplish in protective gas's protective environment to improve the welding seam quality, and reduce welding seam heating action bandwidth width, reduce the oxidation of busbar and utmost point post.

In some embodiments, the protective cover further comprises a dust extraction interface connected to the protective cover body. The dust removal interface is communicated with the welding cavity so as to lead out the smoke dust generated in the welding cavity in time during welding.

Through setting up the dust removal interface, can be when the welding, lead out the smoke and dust that produces in the welding chamber, reduce the accumulation of smoke and dust at the welding position, improve the welding quality of laser to busbar and utmost point post.

According to a second aspect of the embodiments of the present application, there is also provided a welding protection device. The weld protector includes the protective shield of the first aspect, a plurality of guide assemblies, and a positioning member. And the plurality of guide assemblies are sleeved on the protective cover. A plurality of direction subassemblies are used for when the welding, leading the safety cover to make and compress tightly piece and compress tightly busbar and utmost point post. The positioning piece is fixedly connected with the plurality of guide assemblies. The positioning piece is used for positioning the protective cover through a plurality of guide assemblies.

A plurality of guide assemblies are arranged between the positioning piece and the protective cover, so that the protective cover can be connected to the positioning piece, the protective cover can be positioned, and the protective cover can be conveniently ensured to correspond to the bus bar and the pole in the welding process; in addition, the direction subassembly can also lead the safety cover when the welding, makes to compress tightly a compress tightly busbar and utmost point post, reduces the busbar for the removal that utmost point post took place, provides the guarantee for the welding quality of the two.

In some embodiments, the guide assembly includes a connector and a guide. Connecting piece detachably is connected with the stopper, and the first end of connecting piece passes the one side that the safety cover body set up the welding mouth to spacing through the stopper, second end and setting element fixed connection, the connecting piece is used for fixing the safety cover on the setting element. The guide piece is sleeved on the connecting piece and located between the protective cover and the positioning piece, and the guide piece is used for guiding the protective cover when welding and enabling the pressing piece to press the bus bar and the pole.

The connecting piece can fix the protective cover on the positioning piece and position the protective cover, so that the protective cover corresponds to the positions of the busbar and the pole; the guide piece on the connecting piece can provide buffering pressing force for the protective cover when the pressing piece contacts the bus bar and the pole, so that the pressing piece presses the bus bar and the pole, and the movement of the bus bar relative to the pole is reduced.

In some embodiments, the positioning member includes a welding hole and a fixing hole. The welding hole corresponds to the welding port; laser enters the welding cavity through the welding hole and the welding port, and the bus bar and the pole which are positioned at the opening are welded. The fixing hole is fixedly connected with the connecting piece; the positioning piece and the protective cover are connected with the connecting piece through the fixing hole.

Be provided with the welding hole that corresponds with the welding mouth on the setting element, can be convenient for laser along welding hole and welding mouth entering welding chamber, realize the welding to the busbar and the utmost point post of opening position. Set up the fixed orifices with connecting piece looks adaptation on the setting element, can be convenient for through direction subassembly with safety cover and setting element fixed connection to guarantee that the safety cover is relative with the position of busbar and utmost point post.

In some embodiments, the weld protection device further includes a lifter positioned opposite the protective enclosure, the lifter for positioning the busbar and the pole in the opening of the protective enclosure.

Through set up the piece that goes up and down in the position department relative with the safety cover, can lift battery monomer and busbar, make battery monomer's utmost point post and busbar remove towards the safety cover to by compressing tightly on the safety cover piece compress tightly, improved welding protection device's degree of automation.

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

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic view of a first protective cover according to some embodiments;

FIG. 2 is a schematic view of a protective cover compressing busbars and poles in some embodiments;

FIG. 3 is a cross-sectional view of a shield body according to some embodiments;

FIG. 4 is a schematic view of a compression member in some embodiments;

FIG. 5 is a first schematic view of the connection of the boot body to the compression member in some embodiments;

FIG. 6 is a second schematic view of the connection of the boot body to the compression member in some embodiments;

FIG. 7 is a schematic view of a second protective cover according to some embodiments;

FIG. 8 is a schematic view of a fastener connecting a compression member to a boot body according to some embodiments;

FIG. 9 is a schematic view of a third protective cover according to some embodiments;

FIG. 10 is a schematic view of a fourth embodiment of a protective cover;

FIG. 11 is a schematic diagram of a first weld protector according to some embodiments;

FIG. 12 is a schematic view of a guide assembly in some embodiments;

FIG. 13 is a schematic view of a positioning member according to some embodiments;

FIG. 14 is a schematic diagram of a second weld protector according to some embodiments.

Description of reference numerals:

the positioning piece 1, the welding hole 10 and the fixing hole 11;

the guide component 2, the connecting piece 20 and the guide piece 21;

a protective cover 3; a protective cover body 30, a welding port 301, a welding cavity 302, an opening 303, a mounting port 304,

a second fixed structure 3041;

the hold down 31, the first securing structure 311;

a fastener 32;

an air intake interface 33;

a dust removal interface 34;

a bus bar 4;

a pole 5;

a lifting member 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in 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 obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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 this application and the description of the drawings are intended to cover, but not to exclude, other elements. The word "a" or "an" does not exclude a plurality.

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 "an embodiment" 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.

The following description is given with the directional terms in the drawings and not intended to limit the specific configurations of the protective shield and the weld protector of the present application. For example, in the description of the present application, the terms "inner", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.

In the description of the present application, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural groups" means two or more (including two).

In the description of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming the connection. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

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.

In the process of manufacturing the power battery, the plurality of busbars are welded with the single poles of the plurality of batteries respectively through laser, so that the plurality of batteries are connected in series, in parallel or in a mixed manner, a battery module is formed, and the plurality of battery modules are packaged through end plates and straps to form the power battery. When welding busbar and utmost point post, need compress tightly the two with the safety cover, the rethread laser instrument welds the two.

The inventor notices that, at the in-process of welding busbar and utmost point post, when the angle of laser takes place to deviate, can ablate the safety cover, causes the damage of safety cover, can't play the effect of compressing tightly to busbar and utmost point post, and in the safety cover damage back, need change whole safety cover, the replacement cost is high.

In order to solve the problem that the replacement cost is high when the existing protective cover is damaged, the inventor researches and discovers that the protective cover can be detachably arranged, namely, when the compression part of the protective cover is damaged, only the damaged part is replaced to replace the whole protective cover, and the replacement cost of the protective cover is reduced.

Based on the above consideration, in order to solve the problem that the replacement cost is high when the existing protective cover is damaged, the inventor has conducted intensive research and has designed a protective cover. The protective cover comprises a protective cover body and a pressing piece. The safety cover body is provided with a welding port, a welding cavity and an opening which are communicated in sequence, the welding port is opposite to the opening, and the side wall of the welding cavity is provided with a mounting port communicated with the opening. The compressing piece is detachably connected to the mounting opening. During welding, the busbar and the pole are compressed at the opening part of the protective cover through the compression piece, laser enters the welding cavity through the welding opening, and the busbar and the pole which are compressed at the opening are welded. In the technical scheme of this application, when compressing tightly the piece by laser ablation and taking place to damage, will compress tightly the piece and demolish from installing the oral area position to with new compressing tightly the piece and connect at the installing port position, avoided the change to whole safety cover, saved the replacement cost.

The protective cover of the embodiment of the application can be used for compressing the busbar and the pole in the battery, can also be used for welding the pole lug and the connecting piece in the battery, and can also be used for compressing a part to be welded in other equipment or devices.

Under the effect of compressing tightly of this application embodiment safety cover, the battery module that laser formed to the welding back of busbar and utmost point post to and the battery that the battery module was assembled, can be used for multiple power consumption device. The powered device may be, but is not limited to, a cell phone, tablet, laptop, electronic toy, electric tool, battery car, electric car, ship, 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.

According to some embodiments of the present application, there is provided a protective cover, see fig. 1 to 3; fig. 1 is a schematic structural view of a first protective cover in some embodiments, fig. 2 is a schematic structural view of a busbar and a pole compressed by the protective cover in some embodiments, and fig. 3 is a sectional view of a protective cover body 30 in some embodiments. As shown in fig. 1, the protective cover 3 includes a protective cover body 30 and a pressing member 31. As shown in fig. 1 to 3, the shield body 30 has a welding port 301, a welding chamber 302, and an opening 303 that are communicated in this order, the welding port 301 is located opposite to the opening 303, and a side wall of the welding chamber 302 has a mounting port 304 that is communicated with the opening 303; the laser enters the welding cavity 302 along the welding opening 301 to weld the busbar 4 and the pole 5 positioned in the opening 303. The pressing member 31 is detachably attached at the mounting opening 304 for pressing the bus bar 4 and the pole 5 at the time of welding.

The protective cover body 30 is a main body that provides a fixing position for the pressing member 31. The shape of the protective cover body 30 may be a cylindrical shape, a rectangular parallelepiped shape, a prismatic shape, or the like, or may be an irregular shape. When provided in an irregular shape, for example, the end face of the boot body 30 where the weld port 301 is provided may have a size exceeding that of a cylinder, a rectangular parallelepiped, or a prism formed by the other side walls of the boot body 30. The protection cover body 30 may be made of metal, specifically, copper material, stainless steel material, etc., and this application does not limit this.

The welding port 301 is a port for facilitating the entry of laser light into the interior of the boot body 30. The welding port 301 may be provided in a circular, square, or polygonal shape. The circumference of the welding port 301 may be provided with a joint protruding from the end surface of the protection cover body 30, and the joint may guide the laser so that the laser smoothly enters the interior of the protection cover body 30.

The welding chamber 302 is a chamber that provides a welding space for the laser. The shape of the welding chamber 302 may be provided in a cylindrical, rectangular parallelepiped, or prism shape that fits the shield body 30.

The opening 303 is a portion where the bus bar 4 and the post 5 are provided, and is also a portion where the bus bar 4 and the post 5 are welded by laser, and the shape of the opening 303 can be adapted to the shape of the protective cover body 30. For example, the opening 303 may be provided in a circular shape, a square shape, or a polygonal shape based on the shape of the shield body 30.

The mounting opening 304 is an opening provided in a side wall of the weld chamber 302, i.e., a side wall of the shield body 30. The mounting opening 304 provides a fixed location for the compression member 31. The shape of the mounting opening 304 may be square or semicircular, which is not limited in the present application.

The pressing member 31 is a member detachably attached to the protective cover body 30 and presses the bus bar 4 and the post 5 at the time of welding. The shape of the pressure piece 31 is adapted to the shape of the mounting opening 304. The material of the pressing member 31 may be the same as or different from that of the protective cover body 30. The material of the pressing member 31 may be copper, iron, stainless steel, or the like.

When the pressing member 31 is connected to the protective cover body 30, the pressing member 31 is connected to the mounting opening 304 of the protective cover body 30.

When the pressing member 31 is ablated and needs to be replaced, the pressing member 31 is detached from the mounting opening 304 of the protective cover body 30.

For the sake of easy understanding, the process of pressing the bus bar 4 and the pole 5 by the protective cover 3 is explained in detail below with reference to fig. 2, for example.

Before busbar 4 and utmost point post 5 welding, can be like fig. 2, will compress tightly the piece 31 and connect at the installing port 304 position of safety cover body 30, arrange busbar 4 in utmost point post 5's top, and guarantee that the position between the two corresponds, arrange safety cover body 30 and compress tightly the piece 31 in busbar 4's top again, make busbar 4 and utmost point post 5's contact site be located opening 303 position, and make and compress tightly piece 31 and compress tightly in busbar 4 and utmost point post 5 contactless position, move laser generator to safety cover body 30's top at last, make laser follow welding mouth 301 and get into inside the welding chamber 302, weld busbar 4 and utmost point post 5 of opening 303.

When the bus bar 4 and the pole 5 are welded by laser, the bus bar 4 is penetrated by the laser, and then the bus bar 4 and the pole 5 are welded.

In the process of welding the bus bar 4 and the pole 5 by laser, when the laser angle deviates and the pressing piece 31 is ablated and damaged, the pressing piece 31 is detached from the mounting opening 304 of the protective cover body 30, and a new pressing piece 31 is mounted at the mounting opening 304 of the protective cover body 30, so that the pressing piece 31 is replaced.

In the technical scheme of the application, an installation opening 304 is formed in a side wall of the welding cavity 302, namely, a side wall of the protection cover body 30, so that the pressing piece 31 can be detachably connected to the protection cover body 30; when the pressing piece 31 is damaged by laser ablation, the pressing piece 31 can be detached from the mounting opening 304, and a new pressing piece 31 is connected to the mounting opening 304, so that the whole protective cover 3 is prevented from being replaced, and the replacement cost is saved.

In another case, when the pressing member 31 is mounted on the side wall of the protection cover body 30, the end surface of the pressing member 31 close to the opening 303 of the protection cover body 30 is in the same horizontal plane as the opening 303 of the protection cover body 30, so that an annular structure is formed around the opening 303, and the bus bar 4 and the pole 5 can be pressed by the annular structure.

When the safety cover body 30 position in this loop configuration is ablated, can remain and compress tightly piece 31, change safety cover body 30, when compressing tightly 31 position in the loop configuration and being ablated, can remain safety cover body 30, change compressing tightly 31. This mode has also replaced the replacement of whole safety cover 3, has saved the replacement cost.

According to some embodiments of the present application, please continue to refer to fig. 4 to 6, the end of the pressing member 31 has a first fixing structure 311, and the end of the mounting opening 304 has a second fixing structure 3041 matching with the first fixing structure 311. The pressing member 31 and the protection cover body 30 are detachably connected together by the first fixing structure 311 and the second fixing structure 3041.

The first fixing structure 311 is a connecting structure at an end of the pressing member 31. The first fixing structures 311 are provided one at each of both ends of the pressing member 31. The first fixing structure 311 and the pressing member 31 may be fixedly connected or detachably connected. When the connection is fixed, the connection can be made integrally or welded integrally. When a detachable connection is used, it can be plugged together. The first fixing structure 311 and the pressing member 31 may be made of the same material or different materials. The material of first fixed knot structure 311 can set up to copper according to compressing tightly 31, also can be stainless steel etc. and this application does not limit to this.

The second fixing structure 3041 is a connecting structure located at both ends of the mounting opening 304. The second fixing structures 3041 are provided one at each of both ends of the mounting opening 304. The second fixing structure 3041 may be fixedly connected with the protection cover body 30, or detachably connected. When a fixed connection is used, it can be made in one piece. The second fixing structure 3041 may be made of the same material as the protection cover body 30 or different materials. The material of the second fixing structure 3041 may be copper or stainless steel according to the material of the protection cover body 30, which is not limited in this application.

When the pressure member 31 and the protective cover body 30 are connected, the first fixing structure 311 at the end of the pressure member 31 and the second fixing structure 3041 at the end of the mounting hole 304 are connected.

When the pressing member 31 is ablated and needs to be replaced, the first fixing structure 311 at the end of the pressing member 31 is detached from the second fixing structure 3041 at the end of the mounting hole 304.

By providing the first fixing structure 311 at the end of the pressing member 31 and the second fixing structure 3041 at the end of the mounting opening 304, the pressing member 31 can be detachably connected to the mounting opening 304 through the first fixing structure 311 and the second fixing structure 3041, so that the pressing member 31 can be mounted at the mounting opening 304 during welding, and the pressing member 31 can be removed from the mounting opening 304 when the pressing member 31 is damaged due to laser ablation.

With continued reference to fig. 5, fig. 5 is a first schematic view illustrating the connection between the protection cover body 30 and the pressing member 31 in some embodiments. As shown in fig. 5, the first fixing structure 311 is a fixing strip, and the second fixing structure 3041 is a fixing base having a slot, and the slot is adapted to the fixing strip.

The fixing strip can be in a long strip shape or a cylindrical shape. The fixing strip can be provided in one or more than one. When provided in plurality, a plurality of fixing strips may be welded together side by side.

The slot in the fixing base is provided with a notch which is arranged towards the mounting opening 304, and the shape of the slot can be set to be matched with one fixing strip or be matched with a plurality of fixing strips welded together side by side.

When the pressing member 31 is connected to the protective cover body 30, one or more fixing strips at the end of the pressing member 31 are inserted into the slots in the fixing base at the end of the mounting opening 304.

When the pressing member 31 is ablated and needs to be replaced, one or more fixing strips at the end of the pressing member 31 are drawn out of the insertion groove at the end of the mounting opening 304.

The first fixing structure 311 is configured as a fixing strip, the second fixing structure 3041 is configured as a fixing seat having a slot, and when the pressing piece 31 is connected with the protection cover body 30, the fixing strip at the end of the pressing piece 31 can be inserted into the slot at the installation opening 304 of the protection cover body 30; when the pressing piece 31 is detached from the protective cover body 30, the fixing strip at the end of the pressing piece 31 is drawn out from the slot at the installation opening 304 of the protective cover body 30; the matching mode of the fixing strip and the slot can facilitate the connection and the disassembly of the pressing piece 31 and the protection cover body 30.

Referring to fig. 6, fig. 6 is a second schematic view illustrating the connection between the protection cover body 30 and the pressing member 31 in some embodiments. As shown in fig. 6, the first fastening structure 311 is a male seam allowance, and the second fastening structure 3041 is a female seam allowance fitted with the male seam allowance.

When the pressing member 31 is connected to the protective cover body 30, the male end of the pressing member 31 is engaged with the female end of the mounting opening 304.

When the pressing member 31 is ablated and needs to be replaced, the fastening relationship between the male spigot at the end of the pressing member 31 and the female spigot at the end of the mounting opening 304 is released.

The first fixing structure 311 is configured as a male spigot, and the second fixing structure 3041 is configured as a female spigot, so that when the pressing piece 31 and the protective cover body 30 are connected, the male spigot at the end of the pressing piece 31 can be buckled with the female spigot at the installation opening 304 of the protective cover body 30; when the pressing piece 31 is detached from the protective cover body 30, the male spigot at the end of the pressing piece 31 is detached from the female spigot at the mounting opening 304 of the protective cover body 30; the male and female spigots can be conveniently connected and detached with the pressing piece 31 and the protection cover body 30.

Referring to fig. 7, fig. 7 is a schematic view of a second protective cover in some embodiments. As shown in fig. 7, the protective cover 3 further includes a fastener 32. The first fixing structure 311 has a first slot on a side surface thereof, and the second fixing structure 3041 has a second slot on a side surface thereof opposite to the first slot. The fastener 32 is inserted into the second and first slots to fasten the protective cover body 30 and the pressing piece 31.

The fasteners 32 may be provided as fastening rods or as fastening blocks. The fastener 32 may have a cylindrical shape or a prismatic shape. The fastening member 32 may be made of metal or alloy, or may be made of polyethylene, and the like, which is not limited in the present application.

The first slot on the first fixing structure 311 and the second slot on the second fixing structure 3041 can be both shaped as a cylinder or prism that fits the shape of the fastener 32. The first and second slots are each sized to accommodate the radial dimension of the fastener 32.

The first slot and the second slot are respectively disposed at the sides of the first fixing structure 311 and the second fixing structure 3041. Illustratively, when the first fixing structure 311 is configured as a fixing strip and the second fixing structure 3041 is configured as a fixing base having a slot, the side surface of the first fixing structure 311 refers to a surface of the fixing strip parallel to the sidewall of the protection cover body 30, and the side surface of the second fixing structure 3041 refers to two surfaces of the fixing base adjacent to the opening 303 of the slot. When the first fixing structure 311 is configured as a male seam allowance and the second fixing structure 3041 is configured as a female seam allowance, the side surface of the first fixing structure 311 is the surface parallel to the side walls of the protective cover body 30 of the male seam allowance, and the side surface of the second fixing structure 3041 is the surface parallel to the male seam allowance of the female seam allowance.

When the pressing member 31 is connected to the protection cover body 30, the first fixing structures 311 at two ends of the pressing member 31 are connected to the second fixing structures 3041 at two ends of the mounting opening 304, and the fastening members 32 are inserted into the first slots of the first fixing structures 311 and the second slots of the second fixing structures 3041.

When the pressing member 31 is ablated and needs to be replaced, the fastening member 32 is pulled out from the first slot of the first fixing structure 311 and the second slot of the second fixing structure 3041, and then the first fixing structures 311 at the two ends of the pressing member 31 and the second fixing structures 3041 at the two ends of the mounting opening 304 are detached.

Through setting up fastener 32, can be connected the back at pressing member 31 and safety cover 3, fix pressing member 31 and safety cover body 30 to when safety cover 3 compresses tightly busbar 4 and utmost point post 5, reduce the displacement of pressing member 31 for safety cover body 30, guarantee to press the pressing force of 31 to busbar 4 and utmost point post 5.

Referring to fig. 8, fig. 8 is a schematic view illustrating a fastener 32 connecting a pressing member 31 and a protection cover body 30 according to some embodiments. As shown in FIG. 8, according to some embodiments of the present application, the first and second slots are both threaded holes and the fastener 32 is a bolt that mates with the threaded holes.

When the pressing member 31 is connected to the protective cover body 30, the first fixing structure 311 at the end of the pressing member 31 is connected to the second fixing structure 3041 at the end of the mounting hole 304, and then bolts are inserted into the threaded holes of the first fixing structure 311 and the threaded holes of the second fixing structure 3041.

When the pressing member 31 is ablated and needs to be replaced, the bolts are pulled out from the threaded holes of the first fixing structure 311 and the threaded holes of the second fixing structure 3041, and then the first fixing structure 311 at the end of the pressing member 31 is detached from the second fixing structure 3041 at the end of the mounting hole 304.

The first slotted hole and the second slotted hole are both provided with threaded holes, the fastener 32 is provided with a bolt matched with the threaded holes, the pressing piece 31 and the protective cover body 30 can be fixed through the bolt, the firm degree of connection between the pressing piece 31 and the protective cover body 30 is improved, and the pressing force of the pressing piece 31 on the bus bar 4 and the pole 5 is guaranteed.

With continued reference to fig. 4, according to some embodiments of the present application, the pressing member 31 is a pressing plate detachably connected to the mounting opening 304 via a first fixing structure 311 and a second fixing structure 3041.

The shape of the pressure strip is adapted to the shape of the mounting opening 304. The thickness of the pressing plate may be the same as the thickness of the side wall of the protective cover body 30, or may be greater or smaller than the thickness of the side wall of the protective cover body 30.

The two ends of the pressing plate are respectively provided with a first fixing structure 311. The two first fixing structures 311 may be integrally formed with the pressing plate. The material of the pressure strip can be metal or alloy. When the metal is used, it may be copper or iron.

The pressing member 31 is provided as a pressing plate, which can facilitate detachable connection of the pressing member 31 to the protective cover body 30. In addition, the pressing plate is arranged, so that the structure of the pressing piece 31 is simpler, the manufacturing cost is lower, and the replacement cost of the protection cover 3 is more favorably reduced.

Referring to fig. 9, fig. 9 is a schematic view of a third protection cover in some embodiments. As shown in fig. 9, the shield case 3 further includes an air inlet port 33 connected to the shield case body 30. The gas inlet port 33 communicates with the weld chamber 302 to introduce shielding gas into the weld chamber 302 during welding.

The air inlet 33 may be integrally connected to a side wall of the protective cover body 30, or may be detachably connected to the protective cover body 30. When the air inlet 33 is detachably connected to the protective cover body 30, a threaded hole may be formed in the sidewall of the protective cover body 30, an external thread matched with the internal thread is formed in the air inlet 33, and the air inlet 33 is connected to the protective cover body 30 through the threaded hole. The air inlet port 33 may be shaped as a "straight" or "L" with an internal cavity.

The protective gas may be an inert gas, and specifically may be nitrogen or argon.

When the bus bar 4 and the pole 5 are welded, nitrogen, argon or other inert gas is introduced into the welding cavity 302 of the protective cover body 30 through the gas inlet port 33, so that laser is used for welding the bus bar 4 and the pole 5 in an environment with protective gas.

Through setting up interface 33 that admits air, can be when the welding, introduce welding chamber 302 with protective gas such as nitrogen gas, argon gas, make welding process accomplish in the environment that has protective gas, improve the welding quality of laser to busbar 4 and utmost point post 5 to reduce the heating action bandwidth width at welding seam position, and then reduce the oxidation of busbar 4 and utmost point post 5.

Referring to fig. 10, fig. 10 is a schematic view of a fourth protection cover in some embodiments. As shown in fig. 10, the shroud further includes a dust extraction interface 34 connected to the protective cover body 30. The dust removal port 34 communicates with the weld chamber 302 to conduct away the fumes generated in the weld chamber 302 during welding.

The dust removing connector 34 may be integrally connected to the sidewall of the protection cover body 30, or may be detachably connected to the protection cover body 30. The shape of the dust removing interface 34 may be an "L" shape having an inner cavity, and after the dust removing interface 34 is connected to the protection cover body 30, the outlet end of the dust removing interface 34 may face a direction away from the bus bar 4 and the pole 5.

When the bus bar 4 and the pole 5 are welded, the dust in the welding cavity 302 is led out through the dust removal interface 34, so that laser can weld the bus bar 4 and the pole 5 in an environment with less dust.

Through setting up dust removal interface 34, can be when the welding, derive the smoke and dust that produces in the welding chamber 302, reduce the accumulation of the smoke and dust that the welding produced at the welding position, improve the welding quality of laser to busbar 4 and utmost point post 5.

On the basis, in order to further improve the efficiency of leading out the smoke in the welding cavity 302, an induced air device and a smoke treatment device can be further connected to the outlet end of the dust removal connector 34, wherein the induced air device is used for improving the speed of leading out the smoke by the dust removal connector 34, and the smoke treatment device is used for treating the smoke and reducing the influence of the welding smoke on the environment.

The application also provides a welding protection device. Referring to fig. 11, fig. 11 is a schematic view of a first welding protection device in some embodiments. As shown in fig. 11, the welding protection device includes the shield case 3 of the first aspect, a plurality of guide members 2, and a positioning member 1. The guide assemblies 2 are sleeved on the protective cover 3 and used for guiding the protective cover 3 during welding, and the pressing piece 31 is used for pressing the bus bar 4 and the pole 5. The positioning member 1 is fixedly connected with the plurality of guide assemblies 2 and used for positioning the protection cover 3 through the plurality of guide assemblies 2.

The guide member 2 may be provided in a rod shape, or may be provided in a plate shape. The guide component 2 is sleeved on the protective cover 3, specifically, the guide component 2 can be sleeved in a through hole arranged on the protective cover 3, and the through hole can be matched with the rod-shaped guide component 2 and also can be matched with the plate-shaped guide component 2. The guide assembly 2 may be provided in plurality on the protective cover 3. For example, when the shape of the protective cover 3 is a rectangular parallelepiped and the guide member 2 is a rod, the guide member 2 may be fitted to a corner portion of an end surface of the protective cover 3 as shown in fig. 11. When the shape of safety cover 3 sets up to the cuboid, and direction subassembly 2 sets up to platelike, direction subassembly 2 can set up two, and two direction subassemblies 2 can cup joint two marginal position at certain one side of safety cover 3, also can cup joint on other two relative faces except that welding mouth 301 on safety cover 3. The material of the guide member 2 may be the same as or different from that of the protective cover body 30. The material of guide assembly 2 can set up to copper, also can set up to stainless steel etc. and this application does not limit to this.

The positioning member 1 may be provided as a positioning plate. The shape and size of the positioning plate are adapted to the shape and size of the protective cover 3. The guiding component 2 and the positioning component 1 can be fixedly connected or detachably connected. The positioning member 1 may be made of metal, alloy, plastic, or the like.

When the guiding assembly 2 connects the protection cover body 30 to the positioning member 1, one end of the guiding assembly 2 is fixedly connected with the positioning member 1, and the other end of the guiding assembly 2 penetrates through one surface of the protection cover 3 and can enable the protection cover 3 to move on the guiding assembly 2.

When safety cover 3 and busbar 4 contact, busbar 4 can exert an effort for safety cover 3, and under the effect of this effort, safety cover 3 can remove to the direction of keeping away from the busbar on direction subassembly 2, and at the removal in-process, direction subassembly 2 can lead safety cover 3 to a reaction force is applyed for safety cover 3, makes the piece 31 that compresses tightly on the safety cover 3 compress tightly busbar 4 and utmost point post 5.

A plurality of guide assemblies 2 are arranged between the positioning piece 1 and the protective cover 3, so that the protective cover 3 can be connected to the positioning piece 1, the protective cover 3 can be positioned, and the protective cover 3 is convenient to ensure that the positions of the protective cover 3, the busbar 4 and the pole 5 correspond to each other in the welding process; in addition, the guide assembly 2 can also guide the protective cover 3 during welding, so that the pressing piece 31 presses the bus bar 4 and the pole 5, the movement of the bus bar 4 relative to the pole 5 is reduced, and the welding quality of the bus bar 4 and the pole 5 is guaranteed.

On the basis of the above-described embodiment, furthermore, a plurality of protective covers 3 can be fixed to one positioning element 1 at intervals by a plurality of guide assemblies 2. Illustratively, two protective covers 3 can be connected to one positioning element 1 by eight guide assemblies 2, and specifically, four guide assemblies 2 can be sleeved on each protective cover 3. In this way, the plurality of busbars 4 and the plurality of poles 5 can be simultaneously pressed by the plurality of protective covers 3, so that the welding efficiency of the busbars 4 and the poles 5 is improved.

Referring to fig. 11, and with further reference to fig. 12, fig. 12 is a schematic view of the guide assembly 2 in some embodiments. As shown in fig. 12, the guide assembly 2 includes a connecting member 20 and a guide member 21. Connecting piece 20 detachably is connected with the stopper, and the first end of connecting piece 20 passes the one side that safety cover body 30 set up welding mouth 301 to spacing through the stopper, second end and setting element 1 fixed connection, connecting piece 20 are used for fixing safety cover 3 on setting element 1. The guide member 21 is sleeved on the connecting member 20 and located between the protective cover 3 and the positioning member 1, and the guide member 21 is used for guiding the protective cover 3 during welding and enabling the pressing member 31 to press the busbar 4 and the pole 5.

The connecting piece 20 can be in a straight rod shape, a connecting hole is formed in one side, provided with the welding port 301, of the protective cover body 30, the radial size of the connecting hole can be larger than that of the connecting piece 20, the radial size of the limiting piece can be larger than that of the connecting hole, and after the first end of the connecting piece 20 penetrates through the connecting hole, the limiting piece is connected to the position, penetrating out of the connecting hole, of the connecting piece 20 so as to limit the protective cover 3; the second end of the connecting member 20 is fixedly connected to the positioning member 1, and may be welded together or screwed together. The connecting member 20 may be made of metal or alloy, and has a certain rigidity.

The guide 21 may be an elastic guide, which may be a spring, or a guide plate having a plurality of bent structures. When the guide 21 is a spring, the spring is sleeved on the connecting member 20. When the guide member 21 is a guide plate with a plurality of bending structures, a plurality of openings which are opposite in position and matched with the shape of the connecting member 20 are arranged on the guide plate along the compression direction or the stretching direction of the guide plate, and the guide plate is sleeved on the connecting member 20 through the plurality of openings.

When safety cover 3 and busbar 4 contact, busbar 4 can exert an effort for safety cover 3, and under the effect of this effort, safety cover 3 can be on connecting piece 20 towards the direction displacement of keeping away from busbar 4, and at the removal in-process, connecting piece 20 can lead safety cover 3, and guide 21 can exert a reaction force for safety cover 3, makes the piece 31 that compresses tightly on the safety cover 3 compress tightly busbar 4 and utmost point post 5.

In another case, the connecting element 20 may also be connected to another surface of the protection cover body 30, specifically, a surface adjacent to the surface where the welding port 301 is located, when the connecting element 20 is connected to another surface of the protection cover body 30, the connecting element 20 may be set to be "L" shaped, and one end of the connecting element 20 away from the protection cover body 30 may be set toward the positioning element 1.

The connecting piece 20 can fix the protective cover 3 on the positioning piece 1 and position the protective cover 3 so that the protective cover 3 corresponds to the positions of the busbar 4 and the pole 5; the guide member 21 is provided on the connection, so as to provide a buffer pressing force for the protection cover 3 when the pressing member 31 contacts with the bus bar 4 and the pole 5, and ensure the pressing force of the pressing member 31 on the bus bar 4 and the pole 5.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a positioning element in some embodiments. As shown in fig. 13, the positioning member 1 includes a welding hole 10 and a fixing hole 11. The welding hole 10 corresponds to the welding port 301; the laser enters the welding cavity 302 through the welding hole 10 and the welding opening 301, and welds the bus bar 4 and the pole 5 positioned in the opening 303. The fixing hole 11 is fixedly connected with the connecting piece 20; the spacer 1 and the protective cover 3 are connected to each other through the fixing hole 11 and the connecting member 20.

The shape of the welding hole 10 may be the same as the welding opening 301 or may be different from the welding opening 301. The size of the welding hole 10 may be larger than the welding opening 301, or may be the same as the welding opening 301. The welding hole 10 may also correspond to the joint at the location of the aforementioned welding opening 301, so as to guide the laser as it enters the welding opening 301 along the welding hole 10.

The shape and size of the fixing hole 11 can be adapted to the shape and size of the connecting member 20.

Be provided with the welding hole 10 that corresponds with welding mouth 301 on the setting element 1, can be convenient for laser along welding hole 10 and welding mouth 301 entering welding chamber 302, realize the welding to busbar 4 and the utmost point post 5 at opening 303 position. Set up the fixed orifices 11 with connecting piece 20 looks adaptation on the setting element 1, can be convenient for through direction subassembly 2 with safety cover 3 and setting element 1 fixed connection to guarantee that safety cover 3 is relative with the position of busbar 4 and utmost point post 5.

Referring to fig. 14, fig. 14 is a schematic structural diagram of a second welding protection device in some embodiments. As shown in fig. 14, the welding protection device further includes a lifting member 6 located opposite to the protection cover 3, and the lifting member 6 is used to locate the bus bar 4 and the pole 5 in the opening 303 of the protection cover 3.

The lifting member 6 may be a lifting mechanism including a power mechanism and a lifting table. The power mechanism can be a hydraulic cylinder or an electric push rod. The power mechanism can be arranged in one or more than one. When a plurality of power mechanisms are provided, a plurality of power mechanisms may be connected to one elevating platform.

When the bus bar 4 and the pole 5 are welded, the single battery and the bus bar 4 are lifted to the opening 303 of the protective cover 3 by the lifting piece 6, the bus bar 4 is contacted with the pressing piece 31 of the protective cover 3, and the bus bar 4 is pressed on the pole 5 by the protective cover 3.

Through set up lifting unit 6 in the position department relative with safety cover 3, can lift battery monomer and busbar 4, make utmost point post 5 and busbar 4 remove towards safety cover 3 to by the compressing tightly 31 on the safety cover 3 compress tightly, improve welding protection device's degree of automation.

According to some embodiments of the present application, please refer to fig. 1 to 14, a protection cover 3 is provided, the protection cover 3 comprises a protection cover body 30 and a pressing member 31. The shield body 30 has a welding port 301, a welding chamber 302, and an opening 303 that communicate in this order, and a side wall of the welding chamber 302 has a mounting port 304. The both ends that compress tightly 31 have respectively with compress tightly 31 an organic whole fixed strip of being connected, the both ends of installing port 304 have with safety cover body 30 an organic whole fixed base of being connected, offer on the fixed base with the slot of fixed strip adaptation. The side of fixed strip and the side of fixing base all are equipped with the screw hole, and the bolt penetrates in the screw hole, will compress tightly 31 and safety cover body 30 fixed together. An air inlet port 33 is connected to one surface of the protective cover body 30 adjacent to the surface where the welding port 301 is located, and a dust removal port 34 is connected to the side wall opposite to the air inlet port 33.

Before welding, fixing strips at two ends of the pressing piece 31 are inserted into slots of the fixing seat, and then bolts are fixed in a threaded hole of the pressing piece 31 and a threaded hole of the fixing seat, so that the pressing piece 31 is fixed on the protective cover body 30; the busbar 4 and the pole 5 are disposed at the opening 303 portion of the protective cover body 30, and the pressing member 31 is brought into contact with and presses the busbar 4.

During welding, helium is introduced into the welding cavity 302 through the air inlet interface 33, the bus bar 4 and the pole 5 are welded through laser, and smoke generated during welding is led out of the welding cavity 302 through the dust removal interface 34.

When the pressing piece 31 is damaged, the bolt is detached from the threaded hole, the fixing strip at the end of the pressing piece 31 is pulled out from the slot of the fixing seat, and then the new fixing strip on the pressing piece 31 is inserted into the slot and is fixed through the bolt and the threaded hole. When the protective cover 3 is damaged, only the pressing piece 31 needs to be replaced, the whole protective cover 3 does not need to be replaced, and replacement cost is saved.

Those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than others, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (13)

1. A protective cover, comprising:

the protective cover comprises a protective cover body and a protective cover body, wherein the protective cover body is provided with a welding port, a welding cavity and an opening which are sequentially communicated, the welding port is opposite to the opening, and the side wall of the welding cavity is provided with an installation port communicated with the opening; laser enters the welding cavity along the welding port to weld the busbar and the pole positioned at the opening;

and the pressing piece is detachably connected to the mounting opening and used for pressing the bus bar and the pole when welding.

2. The protective cover of claim 1,

the end part of the pressing piece is provided with a first fixing structure;

the end part of the mounting opening is provided with a second fixing structure matched with the first fixing structure;

the pressing piece and the protection cover body are detachably connected together through the first fixing structure and the second fixing structure.

3. The protective cover of claim 2, wherein the first securing structure is a securing strip and the second securing structure is a mounting base having a slot that fits into the securing strip.

4. The protective cover of claim 2, wherein the first securing structure is a male seam allowance and the second securing structure is a female seam allowance that mates with the male seam allowance.

5. A protective cover according to claim 3 or 4,

the device also comprises a fastener;

the side surface of the first fixing structure is provided with a first slot, and the side surface of the second fixing structure is provided with a second slot opposite to the first slot;

the fastener is inserted into the second slot hole and the first slot hole to fasten the protective cover body and the pressing piece.

6. The protective cover of claim 5, wherein the first slot and the second slot are both threaded holes and the fastener is a bolt that mates with the threaded holes.

7. The protective cover of claim 2, wherein the hold-down member is a hold-down plate removably connected to the mounting port by the first and second securing structures.

8. The protective shield of claim 1, further comprising an inlet port connected to the shield body, the inlet port being in communication with the weld chamber for introducing shielding gas into the weld chamber during welding.

9. The protective cover of claim 1, further comprising a dust removal port connected to the protective cover body, the dust removal port being in communication with the weld chamber to conduct away fumes generated in the weld chamber during welding.

10. A weld protection device, comprising:

the protective cover of any one of claims 1 to 9;

the guide assemblies are sleeved on the protective cover and used for guiding the protective cover during welding and enabling the compression pieces to compress the bus bar and the pole;

the locating piece, with a plurality of direction subassembly fixed connection is used for through a plurality of the direction subassembly is right the safety cover is fixed a position.

11. The weld protection device of claim 10, wherein the guide assembly comprises:

the first end of the connecting piece penetrates through one surface of the protective cover body, which is provided with the welding port, and is limited by the limiting block, the second end of the connecting piece is fixedly connected with the positioning piece, and the connecting piece is used for fixing the protective cover on the positioning piece;

the guide piece is sleeved on the connecting piece and located between the protective cover and the positioning piece, and the guide piece is used for guiding the protective cover when welding so that the pressing piece compresses the busbar and the pole.

12. The weld protection device of claim 11, wherein the positioning member comprises:

the welding hole corresponds to the welding port in position; the laser enters the welding cavity through the welding hole and the welding port to weld the busbar and the pole which are positioned at the opening;

the fixing hole is fixedly connected with the connecting piece; the positioning piece and the protective cover are connected through the fixing hole and the connecting piece.

13. The weld protection device of claim 10 or 11, further comprising a lifter positioned opposite the shield for positioning the busbar and the post in the opening of the shield.

Images