CN117754217A - Welding jig for soft package battery - Google Patents

Abstract

The invention relates to the technical field of battery cells and discloses a welding jig for a soft package battery, which comprises a bottom plate, wherein a battery cell pressing plate and a lug fixing piece are arranged on the bottom plate, the battery cell pressing plate is used for pressing a soft package battery cell, the lug fixing piece is used for fixing a lug, the battery cell pressing plate is parallel to the lug fixing piece, a first baffle plate and a second baffle plate are respectively arranged on two sides of the battery cell pressing plate, and the battery cell pressing plate is laminated on the first baffle plate and the second baffle plate; the battery pack is characterized by further comprising a third baffle, wherein the third baffle is positioned on one side, far away from the lug fixing piece, of the bottom plate, the third baffle is parallel to the lug fixing piece, and the third baffle is used for limiting the soft package battery cell. The invention has the advantages of simple structure, stable cell fixation of the soft package battery and strong adaptability.

Description

Welding jig for soft package battery

Technical Field

The invention relates to the technical field of battery cells, in particular to a welding jig for a soft package battery.

Background

With the development of technology and the increasing demand for mobile devices, vehicles and energy storage devices, the demand for batteries as an energy source is rapidly increasing, and with the continuous development and application of renewable energy sources, new energy batteries have become an extremely important component in life, and the application range thereof is becoming wider and wider. In order to respond to the demands of low cost, large capacity, light weight, high safety performance, convenient recovery and the like of batteries in the market, the soft package large battery cell has become a trend. In the production process of the soft-packaged battery, a plurality of positive plates and a plurality of negative plates are generally stacked in a staggered manner, welding operations such as fixedly connecting lugs on the positive plates and the negative plates are needed, and in order to ensure the welding effect in the production process of the battery, the battery is generally fixed through a jig during welding.

For example, patent document publication No. CN 109648242A discloses a tab welding jig device. The tab welding fixture device comprises a base, a first fixing block used for fixing the shell, a second fixing block used for fixing the battery cell, a first power part and a pressing plate used for pressing the tab, wherein the first fixing block and the second fixing block are both arranged on the base, the first power part is arranged on the base, the pressing plate is arranged on the first fixing block in a sliding mode, an included angle between the sliding direction of the pressing plate and a horizontal plane is smaller than 90 degrees, and the first power part drives the pressing plate to slide along the sliding direction of the pressing plate. Through setting up clamp plate and first power portion, first power portion drive clamp plate removes, and the contained angle between the slip direction of clamp plate and the horizontal plane is less than 90, after the welding is accomplished, and first power portion drive clamp plate slides along its slip direction, makes the clamp plate be located the oblique top of utmost point ear, and the clamp plate can not shelter from optic fibre.

Above-mentioned technical scheme can realize carrying out welded fastening processing to electric core and utmost point ear, but carry out welded connection to electric core and utmost point ear in carrying out welded process to electric core, wherein the stability of the position between electric core and the utmost point ear can directly influence the welding effect of utmost point ear when welding, current battery welding jig always carries out the structure of fixing to electric core to conventional electric core size design for when carrying out the welding to big electric core, can't carry out accurate fixing to electric core, leads to carrying out the location to big electric core and utmost point ear unable accurate when the welding, leads to accuracy and the reliability of being connected between electric core and the utmost point ear lower, influences the quality of battery.

Disclosure of Invention

The invention aims to provide a welding jig for a soft-package battery, which solves the technical problems that in the prior art, the battery core cannot be accurately fixed, and the connection accuracy and reliability between the battery core and the electrode lug are low.

In order to achieve the above purpose, the invention adopts the following technical scheme: the welding jig comprises a bottom plate, wherein a battery core pressing plate and a lug fixing piece are arranged on the bottom plate, the battery core pressing plate is used for pressing a soft package battery core, the lug fixing piece is used for fixing a lug, the battery core pressing plate is parallel to the lug fixing piece, a first baffle plate and a second baffle plate are respectively arranged on two sides of the battery core pressing plate, and the battery core pressing plate is laminated on the first baffle plate and the second baffle plate; the battery pack is characterized by further comprising a third baffle, wherein the third baffle is positioned on one side, far away from the lug fixing piece, of the bottom plate, the third baffle is parallel to the lug fixing piece, and the third baffle is used for limiting the soft package battery cell.

The principle and the advantages of the scheme are as follows: when the battery cell is welded, the battery cell is placed on the bottom plate, and the circumference of the battery cell is fixed under the action of the first baffle, the second baffle and the third baffle; through placing the electric core clamp plate on first baffle and second baffle for the installation that the electric core can be accurate firm is on the bottom plate. And the lug is arranged at the corresponding position of the lug fixing piece and the battery cell, so that the lug is fixed under the action of the lug fixing piece, and the relative fixation of the position between the lug and the battery cell is ensured. And when the installation of the battery cell and the tab is completed, conveying the jig provided with the battery cell and the tab to a welding procedure for welding processing.

According to the scheme, the baffle and the connecting plate are respectively arranged in the circumferential direction of the bottom plate, the circumferential direction of the battery cell is fixed under the action of the pressing plate, the stability of the position of the battery cell in the welding process is guaranteed, and the battery cell is prevented from shaking and displacing on the connecting plate. Simultaneously fix the tab through the tab mounting, guarantee the fixed of position between electric core and the tab, the position of being convenient for in welding process confirms, guarantees the accuracy of hookup location between electric core and the tab. And the battery cell and the lug position are fixed, and meanwhile, the pressing structure above the battery cell is simplified, and the convenience of placing and taking the battery cell in the jig is improved.

Preferably, as an improvement, a plurality of positioning grooves are arranged on the bottom plate at intervals, the positioning grooves are mutually parallel, one end of each positioning groove penetrates through one side of the bottom plate, and the other end of each positioning groove extends towards the middle of the bottom plate; one side of the bottom plate is provided with a plurality of positioning holes, and the positioning holes are parallel to the positioning grooves. When the battery cell and the electrode lug are installed, the positions of the battery cell and the electrode lug can be conveniently adjusted, the convenience of installation of the battery cell and the electrode lug on the jig is improved, and the plurality of positioning grooves and the positioning holes are formed in the bottom plate, so that the jig can be conveniently connected or assembled with other parts in the use process, and the expandability of the jig is improved.

Preferably, as an improvement, the tab fixing member is located on a central axis of the positioning hole, and two ends of the tab fixing member are connected with the bottom plate.

Preferably, as an improvement, the tab fixing member comprises a tab backing plate and a tab pressing plate, which are mutually laminated; the lug base plate is provided with a lug groove for placing the lug. The lug pressing plate is provided with lug protrusions at positions corresponding to the lug grooves, and the lug protrusions are used for pressing the lugs. Make the utmost point ear mounting be fixed in the utmost point ear fixed slot when the utmost point ear is fixed, the utmost point ear can be stable be fixed in, avoid when fixing the utmost point ear, the utmost point ear slides on the utmost point ear backing plate, influences the precision of utmost point ear assembly.

Preferably, as an improvement, a plurality of first connecting holes and second connecting holes are formed on the tab backing plate and the tab pressing plate; the first connecting holes are positioned on two sides of the lug grooves and the lug protrusions, and threads are formed in the first connecting holes; the second connecting hole is positioned on the contact surface of the tab groove and the tab bulge, and a magnet is arranged in the second connecting hole. The lug pressing plate can be used for rapidly positioning and connecting under the action of magnetic attraction when the lug base plates are connected.

Preferably, as an improvement, the first baffles are positioned at one end of the opening of the positioning groove on the bottom plate, and the two first baffles are distributed at intervals along the central axis of the bottom plate; the second baffle is located at one end of the positioning groove away from the first baffle.

Preferably, as an improvement, the first baffle and the second baffle are both provided with fixing pliers, the fixed end of the fixing pliers is connected with the first baffle or the second baffle, and the movable end of the fixing pliers is fixedly connected with the cell fixing plate. When the electric core pressing plate is fixed, the height of the fixing clamp can be adjusted according to the thickness of the electric core, the position of the electric core pressing plate is guaranteed to be matched with the thickness of the electric core, the reasonability of the pressure applied to the electric core by the electric core pressing plate is guaranteed, and the soft package electric core damage caused by overlarge pressure of the electric core pressing plate is avoided.

Preferably, as an improvement, a pressing plate protrusion is arranged on one side of the electric core pressing plate, which is close to the tab fixing piece, and the pressing plate protrusion is positioned in the middle of the electric core pressing plate; the clamp plate is protruding to be equipped with the connecting plate, the both ends of connecting plate outwards extend respectively, the height at connecting plate both ends is less than the bottom of electric core clamp plate, the fluting has been seted up at connecting plate extending direction's middle part. When the connecting plate can position one side of the battery cell on the battery cell pressing plate, the lug can conveniently pass through the connecting plate, and convenience of lug welding operation is guaranteed.

Preferably, as an improvement, the second baffle and the third baffle are connected with the bottom plate through slots, the connecting plate is connected with the cell pressing plate and the bottom plate through slots, and the slots are used for adjusting positions of the second baffle, the third baffle and the connecting plate. The second baffle, the third baffle and the connecting plate can be finely adjusted according to the actual conditions of the battery cells, so that when the battery cells are fixed, the areas between the baffle blocks can be suitable for the battery cells with different sizes, welding of the battery cells with different sizes by using a plurality of jigs is avoided, and the cost in the battery welding process is reduced.

Preferably, as an improvement, a rectangular groove is formed in the bottom of the bottom plate, the rectangular groove penetrates through two ends of the bottom plate, and the rectangular groove is used for connecting the bottom plate with external equipment; the storage groove is formed in one side of the bottom plate, provided with the second baffle, and the storage handle is arranged in the storage groove.

Drawings

Fig. 1 is a schematic diagram of a welding jig according to an embodiment of the invention.

Fig. 2 is an exploded view of a tab fastener according to an embodiment of the invention.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the battery cell clamping plate comprises a bottom plate 1, a positioning groove 101, a positioning hole 102, a battery cell clamping plate 2, a clamping plate protrusion 201, a lug fixing piece 3, a lug base plate 301, a lug clamping plate 302, a lug groove 303, a lug protrusion 304, a first connecting hole 305, a second connecting hole 306, a first baffle plate 4, a second baffle plate 5, a first fixing hole 501, a fixing clamp 6, a connecting plate 7, a second fixing hole 701, a third baffle plate 8, a third fixing hole 801, a rectangular groove 9 and a storage groove 10.

As shown in figure 1, a welding jig for a soft package battery comprises a bottom plate 1, wherein a battery core pressing plate 2 and a lug fixing piece 3 are arranged on the bottom plate 1, when a battery core is welded, the battery core is fixed on the bottom plate 1 through the battery core pressing plate 2, the lug is fixed at the corresponding position of the battery core through the lug fixing piece 3, and the battery core and the lug are welded and connected.

The bottom plate 1 is a rectangular fixing plate, wherein a plurality of positioning grooves 101 are arranged on the bottom plate 1 at intervals, the positioning grooves 101 are communicated with two sides of the bottom plate 1, the positioning grooves 101 are parallel to each other, one end of each positioning groove 101 penetrates through one side of the bottom plate 1, the other end of each positioning groove extends towards the middle of the bottom plate 1 along the extending direction of the bottom plate 1, and preferably, in the embodiment, the total positioning grooves 101 comprise three positioning grooves, wherein the central axis of one positioning groove 101 is collinear with the central axis of the bottom plate 1, and the other two positioning grooves 101 are distributed on two sides of the central axis of the bottom plate 1 in opposite directions. A plurality of positioning holes 102 are formed in the side of the base plate 1 where the positioning groove 101 is formed, the positioning holes 102 are parallel to the positioning groove 101, preferably, in this embodiment, 2 positioning holes 102 are formed in the positioning hole 102, and the 2 positioning holes 102 are distributed side by side on the side of the positioning groove 101. Through seting up constant head tank 101 and locating hole 102 on bottom plate 1 for when installing electric core and utmost point ear, can be convenient carry out the adjustment to the position of electric core and utmost point ear, improve the convenience of electric core and utmost point ear installation on the tool, and through seting up a plurality of constant head tanks 101 and locating hole 102 on bottom plate 1, make the tool can be convenient connect or assemble with other parts in the use, improve the scalability of tool.

The lug fixing piece 3 is arranged on one side of the base plate 1, provided with the positioning hole 102, the lug fixing piece 3 and the fixing groove are mutually parallel, the specific lug fixing piece 3 is positioned above the positioning hole 102, the lug fixing piece 3 is positioned on the central axis of the positioning hole 102 parallel to the positioning groove, and two ends of the lug fixing piece 3 are connected with the base plate 1. As shown in fig. 2, the tab fixing member 3 includes a tab backing plate 301 and a tab pressing plate 302, the tab backing plate 301 and the tab pressing plate 302 are stacked and distributed, and the tab backing plate 301 and the bottom plate 1 are fixedly connected by bolts, and the tab pressing plate 302 is stacked on the tab backing plate 301. The tab grooves 303 are formed in the tab backing plate 301, wherein the tab grooves 303 comprise two tab grooves 303, the two tab grooves 303 are distributed in parallel along the extending direction of the tab backing plate 301, the tab grooves 303 penetrate through two sides of the tab backing plate 301, and the tab grooves 303 are used for placing tabs. A tab protrusion 304 is disposed at a position corresponding to the tab pressing plate 302 and the tab groove 303, and the tab protrusion 304 and the tab pressing plate 302 are integrally formed. Make utmost point ear mounting 3 when fixing the utmost point ear, the utmost point ear can be stable be fixed in utmost point ear fixed slot, avoid when fixing the utmost point ear, the utmost point ear slides on utmost point ear backing plate 301, influences the precision of utmost point ear assembly.

A plurality of first connecting holes 305 and second connecting holes 306 are formed in the tab backing plate 301 and the tab pressing plate 302, wherein the first connecting holes 305 on the tab backing plate 301 are located at two sides of the tab groove 303 and the tab protrusion 304, the first connecting holes 305 of the tab backing plate 301 and the tab pressing plate 302 are correspondingly formed, and the tab backing plate 301 and the tab pressing plate 302 are fixedly connected through bolts in the first connecting holes 305. Second connecting holes 306 are formed in corresponding positions on the lug base plate 301 and the lug pressing plate 302, the second connecting holes 306 are located on contact surfaces of the lug grooves 303 and the lug protrusions 304, strong magnets are bonded or buckled in the second connecting holes 306, the lug base plate 301 and the lug pressing plate 302 are connected through bolts through the first connecting holes 305, and magnetic connection is achieved through the second connecting holes 306. So that the tab pressing plate 302 can be rapidly positioned and connected under the action of magnetic attraction when the tab backing plate 301 is connected.

The two ends of the bottom plate 1 are respectively provided with a first baffle 4 and a second baffle 5, wherein the first baffle 4 is positioned at one end of the bottom plate 1, which is open to the positioning groove 101, the first baffles 4 comprise two, the two first baffles 4 are distributed at intervals along the central axis of the bottom plate 1, the two specific first baffles 4 are positioned at two sides of the positioning groove 101 at the center, and the first baffles 4 are connected with the bottom plate 1 through bolts between the positioning groove 101 and the bottom plate 1. A second baffle 5 is installed at one end of the positioning groove 101 far away from the first baffle 4, and the first baffle 4 and the second baffle 5 are parallel to each other. The length of the second baffle 5 in the direction parallel to the extension direction of the first baffle 4 matches the distribution area of the three positioning grooves 101. The second baffle 5 is provided with a first fixing hole 501, the first fixing hole 501 is used for connecting the second baffle 5 with the bottom plate 1, the first fixing hole 501 is a slot, and the extending direction of the slot is perpendicular to the extending direction of the second baffle 5, so that the second baffle 5 can move along the direction far from or near to the first baffle 4 when being fixed.

A battery core pressing plate 2 is arranged above the bottom plate 1, two ends of the battery core pressing plate 2 are respectively connected with a first baffle plate 4 and a second baffle plate 5, a fixed clamp 6 is specifically fixedly connected to the opposite sides of the first baffle plate 4 and the second baffle plate 5 through bolts, the fixed end of the specific fixed clamp 6 is positioned at the joint of the first baffle plate 4 or the second baffle plate 5 and the bottom plate 1, and the fixed end of the fixed clamp 6 is fixedly connected with the bottom plate 1, the first baffle plate 4 or the second baffle plate 5 through bolts; the movable end of the fixed clamp 6 is fixedly connected with the cell pressing plate 2 through bolts. The fixing clamp 6 is preferably a latch-type quick clamp in this embodiment. When the electric core pressing plate 2 is fixed, the height of the fixing clamp 6 can be adjusted according to the thickness of the electric core, the position of the electric core pressing plate 2 is guaranteed to be matched with the thickness of the electric core, the reasonability of the pressure applied by the electric core pressing plate 2 to the electric core is guaranteed, and the soft package electric core damage caused by overlarge pressure of the electric core pressing plate 2 is avoided.

A pressing plate protrusion 201 is arranged on one side of the cell pressing plate 2, which is close to the lug pressing plate 302, and the specific pressing plate protrusion 201 and the cell pressing plate 2 are integrally formed, and the pressing plate protrusion 201 is positioned in the middle of the cell pressing plate 2. The connecting plate 7 is fixedly connected to the pressing plate bulge 201 through bolts, two ends of the connecting plate 7 extend outwards respectively, the height of the part, outside the pressing plate bulge 201, of the connecting plate 7 is lower than the bottom of the battery cell pressing plate 2, and a slot is formed in the middle of the extending direction of the connecting plate 7, so that when the battery cell is fixed by the connecting plate 7, a tab can conveniently penetrate through the connecting plate 7 to be welded with the battery cell. A connecting groove is formed in the corresponding position of the bottom plate 1 and the connecting plate 7, the bottom of the connecting plate 7 is fixedly connected with the bottom of the connecting groove through bolts, second fixing holes 701 are formed in the connecting positions of the connecting plate 7, the connecting groove and the pressing plate bulge 201, the connecting plate 7 is connected with the connecting groove and the pressing plate bulge 201 through the second fixing holes 701 through bolts, the second fixing holes 701 are slotted holes, and the extending direction of the slots of the second fixing holes 701 connected with the pressing plate bulge 201 is perpendicular to the plane of the bottom plate 1, so that the fixing position of the connecting plate 7 can move up and down along the height direction; the slotted extension direction of the second fixing hole 701 connected with the fixing groove is perpendicular to the extension direction of the tab pressing plate 302, so that the fixing position of the connection plate 7 can be moved in the direction approaching or separating from the tab pressing plate 302, and the position of the connection plate 7 can be adjusted when the connection plate 7 is mounted.

The side of the bottom plate 1, which is far away from the positioning hole 202, is provided with a third baffle plate 8, the third baffle plate 8 and the lug fixing piece 3 are respectively positioned at two sides of the fixing groove, the third baffle plate 8 is parallel to the lug fixing piece 3 and the cell pressing plate 2, a plurality of third fixing holes 801 are formed in the third baffle plate 8, the third fixing holes 801 are uniformly distributed in the third baffle plate 8, and the third baffle plate 8 is connected with the bottom plate 1 through bolts between the third fixing holes 801. The third fixing hole 801 is a slot hole, and an extending direction of the third fixing hole 801 is perpendicular to an extending direction of the third baffle 8, so that a connection position between the third baffle 8 and the bottom plate 1 can be adjusted along a direction approaching or separating from the cell pressing plate 2.

Rectangular grooves 9 are formed in the bottom of the bottom plate 1, the specific rectangular grooves 9 are located on one side, provided with the lug fixing pieces 3, of the bottom plate 1, the rectangular grooves 9 penetrate through two sides of the bottom plate 1, and the rectangular grooves 9 are used for connecting the bottom plate 1 with external equipment such as a welding machine tool track. A storage groove 10 is formed in one side, provided with the second baffle plate 5, of the bottom plate 1, and a storage handle is fixedly connected to the storage groove 10 through bolts and used for moving the welding jig.

The specific implementation process is as follows:

when the battery cell is welded, the battery cell is placed on the bottom plate 1, and the positions of the second baffle plate 5 and the third baffle plate 8 are adjusted, so that the circumference of the battery cell is fixed under the action of the first baffle plate 4, the second baffle plate 5 and the third baffle plate 8; through place electric core clamp plate 2 on first baffle 4 and second baffle 5 to fix electric core clamp plate 2 on first baffle 4 and second baffle 5 through fixed pincers 6, guarantee the close contact between electric core clamp plate 2 and the electric core simultaneously, through adjusting the position of connecting plate 7 on the electric core clamp plate 2, make the installation that the electric core can be accurate firm on bottom plate 1. And the lug is arranged at the corresponding position of the lug fixing piece 3 and the battery cell, so that the lug is fixed under the action of the lug fixing piece 3, and the relative fixation of the position between the lug and the battery cell is ensured. And when the installation of the battery cell and the tab is completed, conveying the jig provided with the battery cell and the tab to a welding procedure for welding processing.

Compared with the prior art, through set up baffle and connecting plate 7 respectively in the circumference of bottom plate 1 in this scheme to fix the circumference of electric core under the effect of clamp plate, guarantee the stability of electric core in welding process position, avoid electric core to appear rocking and displacement on connecting plate 7. Simultaneously, the lug is fixed through the lug backing plate 301 and the lug pressing plate 302, so that the position between the battery cell and the lug is fixed, the position in the welding process is convenient to determine, and the accuracy of the connection position between the battery cell and the lug is ensured. And through being connected second dog, third dog and connecting plate 7 through the slotted hole for when fixing the electric core, the region between the dog can adapt to not unidimensional electric core, avoids needing to use a plurality of jigs to weld when welding not unidimensional electric core, reduces the cost in the battery welding process.

The foregoing is merely exemplary of the present invention and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present invention, and these should also be regarded as the protection scope of the present invention, which does not affect the effect of the implementation of the present invention and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (10)

1. A welding jig for soft packet of battery, its characterized in that: the battery cell press plate is used for pressing a soft package battery cell, the tab fixing piece is used for fixing the tab, the battery cell press plate is parallel to the tab fixing piece, a first baffle plate and a second baffle plate are respectively arranged on two sides of the battery cell press plate, and the battery cell press plate is laminated on the first baffle plate and the second baffle plate; the battery pack is characterized by further comprising a third baffle, wherein the third baffle is positioned on one side, far away from the lug fixing piece, of the bottom plate, the third baffle is parallel to the lug fixing piece, and the third baffle is used for limiting the soft package battery cell.

2. The welding jig for a soft pack battery according to claim 1, wherein: the bottom plate is provided with a plurality of positioning grooves at intervals, the positioning grooves are parallel to each other, one end of each positioning groove penetrates through one side of the bottom plate, and the other end of each positioning groove extends towards the middle of the bottom plate; one side of the bottom plate is provided with a plurality of positioning holes, and the positioning holes are parallel to the positioning grooves.

3. The welding jig for a soft pack battery according to claim 2, wherein: the tab fixing piece is located on the central axis of the positioning hole, and two ends of the tab fixing piece are connected with the bottom plate.

4. The welding jig for a soft pack battery according to claim 3, wherein: the tab fixing piece comprises a tab backing plate and a tab pressing plate, and the tab backing plate and the tab pressing plate are mutually overlapped and distributed; the lug base plate is provided with a lug groove for placing the lug. The lug pressing plate is provided with lug protrusions at positions corresponding to the lug grooves, and the lug protrusions are used for pressing the lugs.

5. The welding jig for a soft pack battery according to claim 4, wherein: the lug base plate and the lug pressing plate are provided with a plurality of first connecting holes and second connecting holes; the first connecting holes are positioned on two sides of the lug grooves and the lug protrusions, and threads are formed in the first connecting holes; the second connecting hole is positioned on the contact surface of the tab groove and the tab bulge, and a magnet is arranged in the second connecting hole.

6. The welding jig for a soft pack battery according to claim 2, wherein: the first baffles are positioned at one end of the opening of the positioning groove on the bottom plate, and the two first baffles are distributed at intervals along the central axis of the bottom plate; the second baffle is located at one end of the positioning groove away from the first baffle.

7. The welding jig for a soft pack battery according to claim 6, wherein: the first baffle plate and the second baffle plate are respectively provided with a fixed clamp, the fixed ends of the fixed clamps are connected with the first baffle plate or the second baffle plate, and the movable ends of the fixed clamps are fixedly connected with the cell fixing plate.

8. The welding jig for a soft pack battery according to claim 1, wherein: a pressing plate bulge is arranged on one side of the battery cell pressing plate, which is close to the lug fixing piece, and the pressing plate bulge is positioned in the middle of the battery cell pressing plate; the clamp plate is protruding to be equipped with the connecting plate, the both ends of connecting plate outwards extend respectively, the height at connecting plate both ends is less than the bottom of electric core clamp plate, the fluting has been seted up at connecting plate extending direction's middle part.

9. The welding jig for a soft pack battery according to claim 8, wherein: the second baffle plate and the third baffle plate are connected with the bottom plate through slotted holes, the connecting plate is connected with the battery core pressing plate and the bottom plate through slotted holes, and the slotted holes are used for adjusting the positions of the second baffle plate, the third baffle plate and the connecting plate.

10. The welding jig for a soft pack battery according to claim 1, wherein: rectangular grooves are formed in the bottom of the bottom plate, penetrate through the two ends of the bottom plate, and are used for connecting the bottom plate with external equipment; the storage groove is formed in one side of the bottom plate, provided with the second baffle, and the storage handle is arranged in the storage groove.