CN215451448U - Battery pack production equipment - Google Patents

Abstract

The present invention provides a battery pack production apparatus including: the device comprises a welding bearing device, a battery string providing device, a transverse bus bar providing device, a bypass bus bar providing device and a welding device; the battery string providing device provides a first battery string and a second battery string, and the transverse bus bar providing device provides a head end bus bar, a tail end bus bar and a middle bus bar; the bypass bus bar providing device provides a bypass bus bar; the bypass bus bar providing device comprises a bypass bus bar bearing device, an insulating tape laying device, a bypass bus bar laying device and a hot-pressing device; the insulating tape laying device lays the insulating tape on the bypass bus bar bearing device, the bypass bus bar laying device is arranged to lay the bypass bus bar on the insulating tape, and the hot-pressing device welds the insulating tape and the bypass bus bar together. The technical scheme provided by the utility model can be used for efficiently producing the battery pack.

Description

Battery pack production equipment

Technical Field

The utility model relates to the technical field of battery assembly production, in particular to battery assembly production equipment.

Background

The production of photovoltaic modules is a process of modularizing a single cell. The method comprises the following main steps: welding single battery pieces (whole battery pieces which are not broken off or half battery pieces which are broken off) into strings by using welding strips, then arranging the welded battery strings in parallel to form a battery string group, and then welding bus bars on the welding strips of the battery string group.

Currently, during the production of a battery string, it is common to weld a bypass bus bar and an end bus bar alongside the battery string in the battery string.

For this reason, it is necessary to provide an existing component production apparatus or production method to enable efficient production of a battery component.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a cell assembly production apparatus to enable efficient production of cell assemblies.

In order to achieve the above object, the present invention provides a battery pack production apparatus including: the device comprises a welding bearing device, a battery string providing device, a transverse bus bar providing device, a bypass bus bar providing device and a welding device;

the battery string group providing device provides a first battery string group and a second battery string group, wherein the first battery string group and the second battery string group respectively comprise at least two battery strings which are arranged side by side along the width direction of the battery strings;

the transverse bus bar providing device is used for providing a head end bus bar, a tail end bus bar and an intermediate bus bar;

the bypass bus bar providing device is used for providing a bypass bus bar;

the first battery string set, the second battery string set, the head-end bus bar, the tail-end bus bar, the intermediate bus bar, and the bypass bus bar are placed on the welding carrier; the first battery string group and the second battery string group are arranged on the welding bearing device along the length direction of the battery strings; the head end bus bar is stacked below the head end welding strip of the first battery string group, the middle bus bar is stacked below the tail end welding strip of the first battery string group and the head end welding strip of the second battery string group, and the tail end bus bar is stacked below the tail end welding strip of the second battery string group; the bypass bus bar extends along the length direction of the battery string, one end of the bypass bus bar is stacked on the head end bus bar, and the other end of the bypass bus bar is stacked on the tail end bus bar;

the welding device welds the welding strips of the first battery string group and the second battery string group loaded on the welding and loading device with the head end bus bar, the tail end bus bar, the middle bus bar and the bypass bus bar to form a battery assembly;

the bypass bus bar providing device comprises a bypass bus bar bearing device, an insulating tape laying device, a bypass bus bar laying device and a hot-pressing device; the insulating tape laying device is arranged to lay insulating tapes on the bypass bus bar carrying device, the bypass bus bar laying device is arranged to lay bypass bus bars on the insulating tapes of the bypass bus bar carrying device, and the hot-pressing device welds the insulating tapes on the bypass bus bar carrying device and the bypass bus bars together.

Preferably, the insulating tape laying device comprises an insulating tape roll, an insulating tape traction device, an insulating tape pressing device and an insulating tape cutting device, the insulating tape roll is located at the first end of the bypass bus bar bearing device, the insulating tape traction device pulls the insulating tape from the insulating tape roll and moves to a preset position towards the second end of the bypass bus bar bearing device, the insulating tape pressing device presses the insulating tape, the insulating tape cutting device cuts the pressed insulating tape, and the cut insulating tape is laid on the bypass bus bar bearing device;

bypass busbar is spread device and is included bypass busbar book, bypass busbar draw gear, bypass busbar closing device and bypass busbar cutting device, bypass busbar book is located bypass busbar load-carrying device's second end, bypass busbar draw gear follows bypass busbar material book draws the busbar and moves towards when bypass busbar load-carrying device's first end moves to preset position, bypass busbar closing device compresses tightly the busbar, bypass busbar cutting device cuts the busbar that compresses tightly, and the bypass busbar that obtains after cutting is spread on bypass busbar loading device's the insulating strip.

Preferably, the bypass bus bar providing device further comprises a first bus bar providing device and a first bus bar welding device;

the first bus bar providing device is configured to provide a first bus bar and place the first bus bar on the bypass bus bar of the bypass bus bar carrying device, the first bus bar welding device welds the first bus bar with the bypass bus bar, and the bypass bus bar providing device provides the bypass bus bar welded with the insulating tape and the first bus bar.

Preferably, the first busbar providing device comprises a first bearing table, a first bending mechanism and a first carrying device;

the first bearing table is used for bearing a bus bar to be bent, when the bus bar is positioned on the first bearing table and one end of the bus bar extends out of the first bearing table, the first carrying device presses the bus bar onto the first bearing table, and the first bending mechanism bends the part of the bus bar, which extends out of the first bearing table, to form the L-shaped first bus bar;

the first bus bar welding device is arranged at the end position of the second end of the bypass bus bar bearing device and comprises a welding head capable of lifting, when the bypass bus bar traction device draws a bus bar to a preset position from the bypass bus bar coil, the welding head ascends, the first carrying device adsorbs the first bus bar from the first bearing platform and places the first bus bar at the position of the bypass bus bar corresponding to the welding head, and the first carrying device compresses the first bus bar, and the welding head welds the first bus bar on the bypass bus bar.

Preferably, the first busbar providing device further comprises a first busbar traction device, a first busbar pressing device and a first busbar cutting device;

when the first bus bar traction device pulls the front end of a bus bar to stretch out of the first bearing table, the first bus bar pressing device presses the bus bar pulled by the first bus bar traction device, the first bus bar cutting device cuts the bus bar, and the cut bus bar is located on the first bearing table and the front end stretches out of the first bearing table.

Preferably, the transverse bus bar providing device includes a head-end bus bar providing device for providing the head-end bus bar, a tail-end bus bar providing device for providing the tail-end bus bar, and an intermediate bus bar providing device for providing the intermediate bus bar;

the middle bus bar providing device comprises at least two middle bus bar bearing tables, a middle bus bar traction device, a middle bus bar cutting device, a second bus bar providing device and a second bus bar welding device, wherein the middle bus bar bearing tables draw primary bus bars towards each middle bus bar bearing table by the middle bus bar traction device and cut by the middle bus bar cutting device, so that each middle bus bar bearing table bears one section of middle bus bar;

the second bus bar providing device places a second bus bar on an intermediate bus bar of one of the intermediate bus bar loading tables, and the second bus bar welding device welds the second bus bar and the intermediate bus bar together;

the intermediate bus bar providing device provides at least two sections of intermediate bus bars to the welding bearing device, wherein the second bus bars are welded on one section of intermediate bus bars.

Preferably, the second bus bar providing device comprises a second bearing table, a second bending mechanism and a second carrying device;

the bus bar is located on the second bearing table, the front end of the bus bar extends out of the second bearing table, the bus bar is pressed on the second bearing table by the second carrying device, the bus bar is bent by the second bending mechanism from the portion, extending out of the second bearing table, of the bus bar to form an L-shaped second bus bar, and the second carrying device absorbs the second bus bar on the second bearing table and carries the second bus bar to one of the middle bus bars of the middle bearing table.

According to another aspect of the present invention, there is also provided a battery assembly production method including:

providing a bypass bus bar by a bypass bus bar providing device;

providing a head-end bus bar, a tail-end bus bar and an intermediate bus bar by a transverse bus bar providing device;

providing a first battery string group and a second battery string group by a battery pack providing device, the first battery string group and the second battery string group each including at least two battery strings arranged side by side in a width direction of the battery strings;

placing the provided bypass bus bar, the head end bus bar, the end tail end bus bar, the intermediate bus bar, the first battery string group, and the second battery string group on a welding carrier; the first battery string group and the second battery string group are arranged on the welding bearing device along the length direction of the battery strings; the head end bus bar is stacked below the head end welding strip of the first battery string group, the middle bus bar is stacked below the tail end welding strip of the first battery string group and the head end welding strip of the second battery string group, and the tail end bus bar is stacked below the tail end welding strip of the second battery string group; the bypass bus bar extends along the length direction of the battery string, one end of the bypass bus bar is stacked on the head end bus bar, and the other end of the bypass bus bar is stacked on the tail end bus bar;

controlling a welding device to weld the welding strips of the first battery string group and the second battery string group, which are loaded on the welding loading device, with the head end bus bar, the tail end bus bar, the middle bus bar and the bypass bus bar to form a battery assembly;

wherein the control bypass bus bar providing device provides a bypass bus bar, including:

laying an insulating tape on the bypass bus bar bearing device;

laying a bypass bus bar on an insulating tape of the bypass bus bar carrying device;

welding the bypass bus bar and the insulating tape together.

Preferably, the laying of the insulation tape on the bypass bus bar carrying device includes:

drawing an insulating tape from an insulating tape roll located at the first end of the bypass bus bar carrying device by using an insulating tape drawing device to move towards the second end of the bypass bus bar carrying device, and cutting the drawn insulating tape, wherein the cut insulating tape is laid on the bypass bus bar carrying device;

or, lay insulating tape on bypass busbar load-bearing device, include:

drawing an insulating tape from an insulating tape roll positioned at the first end of the bypass bus bar bearing device by using an insulating tape drawing device to move to a first preset position towards the second end of the bypass bus bar bearing device, and cutting the drawn insulating tape, wherein the cut first section of the insulating tape is laid on the bypass bus bar bearing device;

the insulating tape traction device draws the insulating tape from the insulating tape roll again to move to a second preset position towards the second end of the bypass bus bar bearing device and cuts the drawn insulating tape to obtain a second section of insulating tape, the insulating tape traction device continuously draws the cut second section of insulating tape to move to a third preset position, and the insulating tape is laid on the bypass bus bar bearing device; wherein the first and second lengths of insulating tape are arranged on the bypass busbar carrying means with a spacing in the length direction.

Preferably, the laying of the bypass bus bar on the insulating tape of the bypass bus bar carrying device includes:

drawing bus bars from a bypass bus bar roll located at the second end of the bypass bus bar carrying device by using a bypass bus bar drawing device to move towards the first end of the bypass bus bar carrying device, and cutting the drawn bus bars, wherein the cut bypass bus bars are laid on an insulating tape of the bypass bus bar carrying device.

Preferably, the control bypass bus bar providing device provides a bypass bus bar, further comprising:

placing a first bus bar at a predetermined position of the bypass bus bar, and welding the first bus bar and the bypass bus bar together.

Preferably, the placing the first bus bar at a predetermined position of the bypass bus bar and welding the first bus bar and the bypass bus bar together includes:

a first bus bar traction device is adopted to draw the bus bar until the front end of the bus bar exceeds the first bearing table;

cutting the bus bar pulled by the first bus bar pulling device at a preset position, wherein the cut bus bar is positioned on the first bearing table, and the front end of the cut bus bar extends out of the first bearing table;

pushing the bus bar extending out of the first bearing table upwards by adopting a first bending mechanism, so that the bus bar on the first bearing table is bent to form an L-shaped first bus bar; when the first bending mechanism bends the bus bar, the bus bar is pressed on the first bearing table by the first carrying device;

when the bypass bus bar traction device pulls the bus bar to move to a preset position, driving a welding head of the first bus bar welding device to ascend, wherein the welding head is located at the end position of the second end of the bypass bus bar bearing device, the first carrying device carries and presses the first bus bar to the position, corresponding to the welding head, of the bypass bus bar, and the welding head welds the first bus bar on the bypass bus bar.

Preferably, the lateral bus bar providing device includes a head-end bus bar providing device, a tail-end bus bar providing device, and an intermediate bus bar providing device;

providing a head end bus bar, a tail end bus bar, and an intermediate bus bar by a transverse bus bar providing device, comprising:

providing a head-end bus bar by the head-end bus bar providing device, providing a tail-end bus bar by the tail-end bus bar providing device, and providing an intermediate bus bar by the intermediate bus bar providing device;

wherein the providing of the intermediate bus bar by the intermediate bus bar providing device includes:

drawing the bus bars towards each intermediate bus bar bearing table for one time and cutting the bus bars to enable each intermediate bus bar bearing table to bear a section of intermediate bus bar, wherein at least two intermediate bus bar bearing tables are arranged;

placing a second bus bar on the intermediate bus bar of one of the intermediate bus bar carriers by a second bus bar providing device, and welding the second bus bar and the intermediate bus bar together by a second bus bar welding device.

Preferably, the second bus bar providing device comprises a second bearing table, a second bending mechanism and a second carrying device;

the placing of the second bus bar on the intermediate bus bar of one of the intermediate bus bar loading stages by the second bus bar supply device includes:

when the bus bar is drawn to the position that the front end of the bus bar extends out of the second bearing table, the bus bar is cut, the cut bus bar is located on the second bearing table, and the front end of the cut bus bar extends out of the second bearing table;

the second carrying device is controlled to press the bus bars onto the second bearing table, the second bending mechanism bends the parts, extending out of the second bearing table, of the bus bars to form the L-shaped second bus bars, the second carrying device adsorbs the second bus bars from the second bearing table and carries the second bus bars onto the middle bus bars of one of the middle bus bar bearing tables

According to the technical scheme provided by the utility model, the battery assembly with the bypass bus bar, the head end bus bar, the tail end bus bar and the middle bus bar can be efficiently produced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic configuration of a battery assembly production apparatus according to an embodiment of the present invention;

fig. 2 is a schematic view of a battery module to be produced according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a bypass bus bar providing apparatus according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is an enlarged view of a portion of FIG. 3 from another angle;

fig. 6 is an enlarged view of a structure where the first bus bar of fig. 3 is prepared;

FIG. 7 is a schematic structural view of the hot press apparatus (viewed from the bottom);

fig. 8 is a schematic structural view of an intermediate bus bar supplying apparatus.

Description of the reference numerals

1-welding a carrier; 2-a glass plate; 3-a bypass bus bar providing device; 31-a bypass busbar carrying means; 32-a roll of insulating tape; 33-a roll of bypass bus bar; 34-an insulating tape traction device; 35-bypass bus bar traction device; 36-bypass busbar compression means; 37-bypass busbar cutting means; 38-a hot-pressing device; 381-mounting beams; 382-a hot-pressing block; 3821-a hot press section; 39-first bus bar traction device; 310-first busbar pressing means; 311-first busbar cutting means; 312 — a first carrier stage; 313-a first bending mechanism; 314-a first handling device; 315-first bus bar welding device. 4-intermediate bus bar providing means; 41-a first intermediate bus bar holder; 42-a second intermediate bus bar carrier; 43-a third intermediate bus bar holder; 44-a second carrier table; 45-a second bending mechanism; 46-a second bus bar welding device; 47-intermediate busbar bending mechanism; 48-second handling means.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. The term "inside" and "outside" refer to the inside and the outside of the contour of each member itself.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

The present invention provides a battery pack production apparatus including: the welding and carrying device 1, the battery string group providing device, the transverse bus bar providing device, the bypass bus bar providing device and the welding device;

the battery string supply device supplies a first battery string a1 and a second battery string a2, wherein the first battery string a1 and the second battery string a2 each include at least two battery strings arranged side by side in a width direction of the battery strings;

the transverse bus bar providing device is used for providing a head end bus bar c, a tail end bus bar d and an intermediate bus bar e;

the bypass bus bar providing device is used for providing a bypass bus bar b;

the first battery string a1, the second battery string a2, the head end bus bar c, the tail end bus bar d, the intermediate bus bar e, and the bypass bus bar b are provided to be placed on the welding carrier 1; as shown in fig. 2, the first cell string group a1 and the second cell string group a2 are arranged on the welding carrier 1 along the length direction of the cell strings; the head end bus bar c is stacked below the head end solder strip of the first battery string a1, the middle bus bar e is stacked below the tail end solder strip of the first battery string a1 and the head end solder strip of the second battery string a2, and the tail end bus bar d is stacked below the tail end solder strip of the second battery string a 2; the bypass bus bar b extends along the length direction of the battery string, one end of the bypass bus bar b is stacked on the head end bus bar c, and the other end of the bypass bus bar b is stacked on the tail end bus bar d;

the welding device welds the welding strips of the first battery string a1 and the second battery string a2, the head end bus bar c, the tail end bus bar d, the middle bus bar e and the bypass bus bar b, which are carried on the welding carrier 1, together to form a battery assembly;

the bypass bus bar providing device comprises a bypass bus bar carrying device 31, an insulating tape laying device, a bypass bus bar laying device and a hot-pressing device 38; the insulating tape laying device is configured to lay insulating tape on the bypass bus bar carrying device 31, the bypass bus bar laying device is configured to lay bypass bus bars on the insulating tape of the bypass bus bar carrying device 31, and the hot-pressing device 38 welds the insulating tape and the bypass bus bars on the bypass bus bar carrying device 31 together.

The battery pack production apparatus provided by the present invention will be described in detail below according to one embodiment.

In a specific embodiment, as shown in fig. 1, the battery string supply device includes a glass plate 2 for carrying the first battery string a1 and the second battery string a2, and a battery string handling device;

the battery string group providing device can further comprise a conveying device and a regulating device, the conveying device bears the glass plates 2 and conveys the glass plates 2 to the feeding station, and the regulating device regulates the positions of the glass plates 2 at the feeding station.

The glass plate 2 is arranged to be capable of moving from a loading station to a blanking station, and when the glass plate 2 is located at the loading station, the battery string conveying device conveys the first battery string a1 and the second battery string a2 on the glass plate 2 to the welding carrying device 1;

when the glass plate 2 moves to the blanking station, the battery string group carrying device carries the battery assembly formed after welding on the welding bearing device 1 onto the glass plate 2.

In the present embodiment, as shown in fig. 3 to 7, the bypass bus bar supply device includes a bypass bus bar carrier 31, an insulating tape laying device, a bypass bus bar laying device, and a hot press device 38.

As shown in fig. 3, the insulating tape laying device includes an insulating tape roll 32, an insulating tape drawing device 34, an insulating tape pressing device, and an insulating tape cutting device, the insulating tape roll 32 is located at a first end of the bypass bus bar carrying device 31, the insulating tape drawing device 34 draws the insulating tape from the insulating tape roll 32 and moves to a preset position toward a second end of the bypass bus bar carrying device 31, the insulating tape pressing device presses the insulating tape, the insulating tape cutting device cuts the pressed insulating tape, and the cut insulating tape is laid on the bypass bus bar carrying device 31;

the bypass bus bar laying device comprises a bypass bus bar roll 33, a bypass bus bar traction device 35, a bypass bus bar pressing device 36 and a bypass bus bar cutting device 37, wherein the bypass bus bar roll 33 is located at the second end of the bypass bus bar bearing device 31, when the bypass bus bar traction device 35 pulls bus bars towards the first end of the bypass bus bar bearing device 31 to a preset position from the bypass bus bar roll 33, the bypass bus bar pressing device 36 presses the bus bars tightly, the bypass bus bar cutting device 37 cuts the pressed bus bars, and the cut bypass bus bars are laid on an insulating strip of the bypass bus bar bearing device 31.

The insulating tape laying device is configured to lay one or at least two parallel insulating tapes on the bypass busbar carrying device 31, and the bypass busbar laying device is configured to lay one bypass busbar on each insulating tape.

When laying at least two parallel insulating tapes, at least two parallel insulating tapes can be simultaneously drawn by at least two parallel insulating tape drawing devices 34, the at least two parallel insulating tapes obtained after cutting are laid on the bypass busbar carrying device 31, at least two parallel busbars are simultaneously drawn by at least two parallel bypass busbar drawing devices 35, and at least two parallel bypass busbars respectively superposed on the insulating tapes are obtained after cutting. Fig. 4 and 5 show two side-by-side insulation tape pulling devices 34 and two side-by-side bypass busbar pulling devices 35.

Preferably, one of the insulating tapes comprises at least two insulating tape segments arranged linearly and at intervals along the length direction. In this way, the stacked bypass bus bars at the space between two insulating tape segments can be electrically conductive to facilitate electrical connection with other bus bars. In one embodiment, the specific laying process of the insulating tape segments on the bypass busbar carrying device 31 is as follows: at least two insulating tape traction devices 34 respectively draw one insulating tape, when one insulating tape traction device 34 draws the insulating tape to move to a first preset position, the drawn insulating tape is cut, and a first section of the cut insulating tape is laid on the bypass bus bar bearing device 31; the insulating tape drawing device 34 then draws the insulating tape from the insulating tape roll 32 again to move to a second preset position towards the second end of the bypass bus bar bearing device 31 and cuts the insulating tape to obtain a second section of insulating tape, the insulating tape drawing device 34 draws the cut second section of insulating tape to move to a third preset position, the second section of insulating tape is laid on the bypass bus bar bearing device 31, the first section of insulating tape and the second section of insulating tape are arranged on the bypass bus bar bearing device 31 in a straight line and at intervals in the length direction, and the interval between the first section of insulating tape and the second section of insulating tape can enable the bypass bus bar stacked on the first section of insulating tape to be welded with the middle bus bar e shown in fig. 2. Another insulating tape drawing device 34 draws the insulating tape in parallel with the first and second lengths of insulating tape to a predetermined position and cuts the tape.

In this embodiment, the bypass bus bar providing apparatus further includes a first bus bar providing apparatus and a first bus bar welding apparatus 315;

the first bus bar providing device is configured to provide a first bus bar and place the first bus bar on the bypass bus bar carrier 31, the first bus bar welding device 315 welds the first bus bar and the bypass bus bar together, and the bypass bus bar providing device provides the bypass bus bar b welded with the insulating tape and the first bus bar, as shown in fig. 2 as a bypass bus bar b having a first bus bar f 1.

Preferably, as shown in fig. 4 and 6, the first bus bar providing device includes a first carrier 312, a first bending mechanism 313, and a first handling device 314;

the first carrier table 32 is configured to carry a bus bar to be bent, when the bus bar is located on the first carrier table 312 and one end of the bus bar extends out of the first carrier table 312, the first carrying device 314 presses the bus bar onto the first carrier table 312, and the first bending mechanism 313 bends a portion of the bus bar extending out of the first carrier table 312 to form an L-shaped first bus bar.

The first bending mechanism 313 includes a lifting member capable of being lifted, and pushes the bus bar extending from the first platform 312 when the lifting member is lifted, so as to bend the bus bar into an L-shaped first bus bar.

The first carrying device 314 includes a frame and an adsorbing member capable of moving and lifting in a lateral direction relative to the frame, and the adsorbing member is configured to elastically press against the first bus bar to be adsorbed, adsorb the first bus bar, and move.

The first busbar providing device further comprises a first busbar traction device 39, a first busbar pressing device 310 and a first busbar cutting device 311;

when the first bus bar traction device 39 pulls the bus bar until the front end of the bus bar extends out of the first bearing table 312, the first bus bar pressing device 310 presses the bus bar pulled by the first bus bar traction device 39, the first bus bar cutting device 311 cuts the bus bar, and the cut bus bar is located on the first bearing table 312. Then, the first handling device 314 presses the bus bar on the first carrier 312 and the first bending mechanism 313 bends the portion of the bus bar extending out of the first carrier 312.

A first bus bar welding device 315 is disposed at an end position of the second end of the bypass bus bar carrier 31, the first bus bar welding device 315 includes a welding head that can be lifted, when the bypass bus bar pulling device 35 pulls the bus bar from the bypass bus bar roll 33 to a predetermined position, the welding head is lifted, the first carrying device 314 sucks the first bus bar from the first carrier 312 and places the first bus bar at a position of the bypass bus bar (at this time, the bypass bus bar is the bus bar pulled by the bypass bus bar pulling device 35 and not cut) corresponding to the welding head, and presses the first bus bar, and the welding head welds the first bus bar to the bypass bus bar. Then, after the bypass bus bar traction device 35 pulls the bus bar to continue moving for a certain distance, the bypass bus bar compressing device 36 compresses the bus bar, the bypass bus bar cutting device 37 cuts the compressed bus bar to obtain the bypass bus bar laid on the insulating tape, and then the bypass bus bar and the insulating tape are hot-pressed together by the hot-pressing device 38.

It will be appreciated by those skilled in the art that the bypass bus bar and the insulating tape may be laid and welded together, and then the first bus bar may be welded to the bypass bus bar using a welding device located above the bypass bus bar.

In the present embodiment, since at least two parallel insulating tapes and the bypass bus bar corresponding to the insulating tapes are laid on the bypass bus bar carrier 31, in order to improve the welding efficiency, it is preferable that the hot press device 38 is configured to weld the at least two parallel insulating tapes and the main bus bar on the bypass bus bar carrier 31 at the same time.

As shown in fig. 7, the hot press apparatus 38 includes a strip-shaped mounting beam 381, at least two rows of heat pressing portions 3821 are disposed on the mounting beam 81, and each row of heat pressing portions 3821 is arranged at intervals along a length direction of the mounting beam 381.

More specifically, at least two hot press blocks 382 are arranged on the mounting beam 381 at intervals in the length direction, and at least two hot press portions 3821 are arranged on each hot press block 381 at intervals in the width direction (two hot press portions 3821 are arranged on each hot press block 382 in the figure), so that at least two rows of hot press portions 3821 are formed on the mounting beam 381 in the length direction, so that two parallel bypass bus bars can be welded at the same time.

The hot pressing device 38 further includes a driving mechanism for driving the mounting beam 38 to move and descend from one side of the bypass bus bar carrying device 31 toward the upper side of the bypass bus bar carrying device 31, and when welding is required, the driving mechanism drives the mounting beam 38 to move to the upper side of the bypass bus bar carrying device 31 and then descend, so that each heat pressing portion 3821 corresponds to one bypass bus bar.

A specific process of providing the bypass bus bar using the bypass bus bar providing apparatus provided in the present embodiment will be described below.

First, the two insulation tape drawing devices 34 are controlled to each draw the parallel insulation tapes from the insulation tape roll 32 and move toward the second end of the bypass bus bar carrying device 31 (the left end of the bypass bus bar carrying device 31 in fig. 1), when one of the insulating tape traction devices 34 draws the insulating tape to move to a first preset position, the drawn insulating tape is cut, a first section of the cut insulating tape is laid on the bypass bus bar bearing device 31, then the insulating tape drawing device 34 draws the insulating tape from the insulating tape roll 32 again to move to a second preset position towards the second end of the bypass bus bar carrying device 31, and cuts the insulating tape to obtain a second section of insulating tape, the insulating tape traction device 34 is used for drawing the cut second section of insulating tape to move to a third preset position, and the insulating tape is laid on the bypass bus bar bearing device 31; wherein the first and second lengths of insulating tape are arranged with a gap in a straight line along the length direction on the bypass busbar carrying device 31. Another insulating tape traction device 34 draws the insulating tape to move to a fourth preset position and cuts the insulating tape to obtain the insulating tape which is laid on the bypass busbar carrying device 31 and is parallel to the first insulating tape and the second insulating tape.

Controlling the two bypass bus bar drawing devices 35 to respectively draw the parallel bus bars from the bypass bus bar roll 33 and move toward a first end (right end in fig. 1) of the bypass bus bar carrier device 31;

in the process of laying the insulating tape and the bypass bus bar or before laying the insulating tape and the bypass bus bar, when the first bus bar traction device 39 is controlled to pull the bus bar until the front end of the bus bar extends out of the first bearing table 312, the first bus bar compression device 310 compresses the bus bar pulled by the first bus bar traction device 39, the first bus bar cutting device 311 cuts the bus bar, and the cut bus bar is located on the first bearing table 312.

The suction member of the first conveying device 314 is controlled to move horizontally and descend to press on the bus bar of the first carrier 312, and the first bending mechanism 313 ascends to bend the portion of the bus bar extending out of the first carrier 312, so as to form an L-shaped first bus bar.

When the bypass bus bar drawing device 35 draws the bus bar to the predetermined position, the welding head of the first bus bar welding device 315 moves upward below the bypass bus bar (the welding head is located near the second end of the bypass bus bar carrying device 31), the first handling device 314 places the sucked first bus bar at a position of the bypass bus bar corresponding to the welding head, and presses the first bus bar, and the welding head welds the first bus bar to the bypass bus bar.

Then, the bypass bus bar traction device 35 draws the bus bar to move continuously, after a certain length of traction is carried out, the bypass bus bar compression device 36 compresses the bus bar, the bypass bus bar cutting device 37 cuts the compressed bus bar, and two parallel bypass bus bars are obtained through cutting, wherein one of the two parallel bypass bus bars is laid on the first section of insulating tape and the second section of insulating tape, and the other parallel bypass bus bar is laid on the other parallel insulating tape of the first section of insulating tape and the second section of insulating tape.

Then, the insulating tape hot-pressing device 38 is controlled to hot-press the insulating tape and the bypass bus bar on the bypass bus bar carrying device 31, so that the insulating tape and the bypass bus bar are fixed together. Of course, it is understood that the insulating tape may also be secured with the bypass bus bar prior to welding the first bus bar to the bypass bus bar.

In this embodiment, the transverse bus bar providing device includes a head-end bus bar providing device for providing the head-end bus bar c, a tail-end bus bar providing device for providing the tail-end bus bar d, and an intermediate bus bar providing device for providing the intermediate bus bar e;

the intermediate bus bar providing device 4 comprises at least two intermediate bus bar bearing tables, an intermediate bus bar traction device, an intermediate bus bar cutting device, a second bus bar providing device and a second bus bar welding device, wherein the intermediate bus bar bearing tables draw primary bus bars towards each intermediate bus bar bearing table by the intermediate bus bar traction device and cut by the intermediate bus bar cutting device, so that each intermediate bus bar bearing table bears one section of intermediate bus bar;

the second bus bar providing device places a second bus bar on an intermediate bus bar of one of the intermediate bus bar loading tables, and the second bus bar welding device welds the second bus bar and the intermediate bus bar together;

the intermediate bus bar providing device provides at least two sections of intermediate bus bars to the welding carrier 1, wherein the second bus bars are welded to one section of the intermediate bus bars.

Specifically, referring to fig. 8, fig. 8 shows a plurality of intermediate bus bar platforms including a first intermediate bus bar platform 41, a second intermediate bus bar platform 42, and a third intermediate bus bar platform 43, after the intermediate bus bar traction device pulls the bus bars to lay on the first intermediate bus bar platform 41, the intermediate bus bar cutting device cuts the bus bars to form a first section of intermediate bus bar e1 on the first intermediate bus bar platform 41, and then the intermediate bus bar traction device pulls the bus bars again to form a second section of intermediate bus bar e2 on the second intermediate bus bar platform 42 after cutting the bus bars, and the intermediate bus bar traction device continues to pull and cut the bus bars for the next time to form a second section of intermediate bus bar e3 on the third intermediate bus bar platform 43. Of course, the intermediate bus bar providing device is not limited to providing three intermediate bus bars, and may provide more intermediate bus bars.

The second bus bar supply device comprises a second bearing table 44, a second bending mechanism 45 and a second carrying device 48;

when the bus bar is located on the second carrier table 44 and the front end of the bus bar extends out of the second carrier table 44 (specifically, the bus bar can be pulled until the front end of the bus bar extends out of the second carrier table 44, and then the bus bar located on the second carrier table 44 is obtained by cutting), the second carrying device 48 presses the bus bar onto the second carrier table 44, the second bending mechanism 45 bends the portion of the bus bar extending out of the second carrier table 44 to form the L-shaped second bus bar, and the second carrying device 48 absorbs the second bus bar from the second carrier table 44 and carries the second bus bar to the intermediate bus bar of one of the intermediate bus bar carrier tables. In this embodiment, the second conveying device 48 conveys the second bus bar to the end of the second intermediate bus bar e2 protruding from the second intermediate bus bar mounting base 42, the second bus bar bonding device 46 includes a bonding head located at one end of the second intermediate bus bar mounting base 42 at a position corresponding to the position where the second bus bar is placed by the second conveying device 48, and when the bonding head of the second bus bar bonding device 46 is raised and the second bus bar is pressed down by the second conveying device 48, the second bus bar bonding device 46 engages with the second conveying device 48 to bond the second bus bar to the second intermediate bus bar e 2. As shown in fig. 2, a second bus bar f2 is welded to a second section of the intermediate bus bar, e 2.

In addition, in the present embodiment, the intermediate bus bar supplying apparatus further includes an intermediate bus bar bending mechanism 47, and the intermediate bus bar bending mechanism 47 bends a predetermined end portion of the intermediate bus bar on the intermediate bus bar stage.

As shown in fig. 8, an intermediate bus bar bending mechanism 47 is provided at an end of the first intermediate bus bar holder 41 for bending an end of the first intermediate bus bar e1 to form a bent portion e11 (see fig. 2). An end of the second intermediate bus bar holder 43 is provided with an intermediate bus bar bending mechanism 47 for bending one end of the third intermediate bus bar e 3.

The specific process for producing the battery component by adopting the battery component production equipment provided by the utility model comprises the following steps:

carrying the battery string to the glass plate 2, forming a first battery string group a1 and a second battery string group a2 on the glass plate 2, and then arranging the position of the glass plate 2 at the feeding station;

the bypass bus bar providing device provides a bypass bus bar b having an insulating tape and a first bus bar f 1;

the head end bus bar providing device provides a head end bus bar c, the tail end bus bar providing device provides a tail end bus bar d, and the middle bus bar providing device provides a middle bus bar e;

the welding bearing device 1 comprises a battery string bearing platform and a bus bar bearing platform, wherein a head end bus bar c, a tail end bus bar d and a middle bus bar e are respectively placed on the bus bar bearing platform of the welding bearing device 1, and the bus bar bearing platform is arranged to be liftable;

the battery string carrying device moves above the bypass bus bar bearing device 31, grabs the bypass bus bar b, then moves above the glass plate 2, grabs the first battery string a1 and the second battery string a2 above the glass plate 2, places the bypass bus bar b, the first battery string a1 and the second battery string a2 on a battery string bearing table of the welding bearing device 1, and controls the battery string bearing table to move and/or rotate to regulate the positions of the battery strings;

referring to fig. 2, the head bus bar c is stacked under the head solder ribbon of the first cell string a1, the middle bus bar e is stacked under the tail solder ribbon of the first cell string a1 and the head solder ribbon of the second cell string a2, and the tail bus bar d is stacked under the tail solder ribbon of the second cell string a 2; the bypass bus bar b extends along the length direction of the battery string, one end of the bypass bus bar b is stacked on the head end bus bar c, and the other end of the bypass bus bar b is stacked on the tail end bus bar d;

controlling the bus bar bearing table to ascend so that the head end bus bar c, the tail end bus bar d and the middle bus bar e are in contact with the end welding strips of the first battery string a1 and the second battery string a2, and welding the bus bars and the end welding strips of the battery strings together by a welding device;

and conveying the glass plate 2 from a feeding station to a discharging station, and conveying the welded battery assembly formed on the welding bearing device 1 to the glass plate 2 by the battery string group conveying device.

According to another aspect of the present invention, there is also provided a battery assembly production method including:

providing a bypass bus bar b by a bypass bus bar providing means;

providing a head-end bus bar c, a tail-end bus bar d, and an intermediate bus bar e by a transverse bus bar providing device;

providing a first battery string a1 and a second battery string a2 by a battery pack providing apparatus, the first battery string a1 and the second battery string a2 each including at least two battery strings arranged side by side in a width direction of the battery strings;

placing the provided bypass bus bar b, the head end bus bar c, the end tail end bus bar d, the intermediate bus bar e, the first cell string a1, and the second cell string a2 on a weld carrier 1; wherein the first cell string a1 and the second cell string a2 are arranged on the welding carrier 1 along the length direction of the cell strings; the head end bus bar c is stacked below the head end solder strip of the first battery string a1, the middle bus bar e is stacked below the tail end solder strip of the first battery string a1 and the head end solder strip of the second battery string a2, and the tail end bus bar d is stacked below the tail end solder strip of the second battery string a 2; the bypass bus bar b extends along the length direction of the battery string, one end of the bypass bus bar b is stacked on the head end bus bar c, and the other end of the bypass bus bar b is stacked on the tail end bus bar d;

controlling a welding device to weld the welding strips of the first battery string a1 and the second battery string a2, which are carried on the welding carrier 1, with the head end bus bar c, the tail end bus bar d, the middle bus bar e and the bypass bus bar b to form a battery assembly;

wherein the control bypass bus bar providing device provides a bypass bus bar, including:

laying an insulating tape on the bypass busbar carrying device 31;

laying a bypass busbar on the insulating tape of the bypass busbar carrying device 31;

welding the bypass bus bar and the insulating tape together.

The laying of the insulating tape on the bypass bus bar carrying device 31 includes:

drawing an insulating tape from an insulating tape roll 32 located at a first end of the bypass busbar carrying device 31 toward a second end of the bypass busbar carrying device 31 using an insulating tape drawing device 34, and cutting the drawn insulating tape, the cut insulating tape being laid on the bypass busbar carrying device 31;

alternatively, the laying of the insulating tape on the bypass bus bar carrier 31 includes:

drawing the insulating tape from an insulating tape roll 32 located at the first end of the bypass busbar carrying device 31 by using an insulating tape drawing device 34 to move to a first preset position towards the second end of the bypass busbar carrying device 31, and cutting the drawn insulating tape, wherein the cut first section of the insulating tape is laid on the bypass busbar carrying device 31;

the insulating tape traction device 34 draws the insulating tape from the insulating tape roll 32 again to move to a second preset position towards the second end of the bypass bus bar bearing device 31 and cuts the drawn insulating tape to obtain a second section of insulating tape, the insulating tape traction device 34 continues to draw the cut second section of insulating tape to move to a third preset position, and the insulating tape is laid on the bypass bus bar bearing device 31; wherein the first and second lengths of insulating tape are arranged on the bypass busbar carrying means 31 with a spacing in the length direction.

The laying of the bypass bus bar on the insulating tape of the bypass bus bar carrying device comprises:

drawing the bus bar from a bypass bus bar roll 33 located at the second end of the bypass bus bar carrier 31 by using a bypass bus bar drawing device 35 to move toward the first end of the bypass bus bar carrier 31, and cutting the drawn bus bar, the cut bypass bus bar being laid on the insulating tape of the bypass bus bar carrier 31.

The control bypass bus bar providing device provides a bypass bus bar, further comprising:

placing a first bus bar at a predetermined position of the bypass bus bar, and welding the first bus bar and the bypass bus bar together.

The placing the first bus bar at a predetermined position of the bypass bus bar and welding the first bus bar and the bypass bus bar together includes:

drawing the bus bar with the first bus bar drawing device 35 to the front end of the bus bar beyond the first plummer 312;

cutting the bus bar pulled by the first bus bar pulling device 39 at a preset position, wherein the cut bus bar is positioned on the first bearing table 312, and the front end of the cut bus bar extends out of the first bearing table 312;

a first bending mechanism 313 is adopted to push the bus bar extending out of the first bearing table 312 upwards, so that the bus bar on the first bearing table 312 is bent to form an L-shaped first bus bar; when the first bending mechanism 313 bends the bus bar, the first carrying device 314 presses the bus bar onto the first carrying stage 312;

when the bypass bus bar drawing device 35 draws the bus bar to move to a predetermined position, the welding head of the first bus bar welding device 315 is driven to ascend, wherein the welding head is located at an end position of the second end of the bypass bus bar carrying device 31, the first carrying device 314 carries and presses the first bus bar to a position of the bypass bus bar corresponding to the welding head, and the welding head welds the first bus bar to the bypass bus bar.

The transverse bus bar providing device comprises a head end bus bar providing device, a tail end bus bar providing device and a middle bus bar providing device;

the providing of the head-end bus bar c, the tail-end bus bar d, and the intermediate bus bar e by the transverse bus bar providing device includes:

providing a head-end bus bar c by the head-end bus bar providing device, a tail-end bus bar d by the tail-end bus bar providing device, and an intermediate bus bar e by the intermediate bus bar providing device;

wherein the providing of the intermediate bus bar by the intermediate bus bar providing device includes:

drawing the bus bars towards each intermediate bus bar bearing table for one time and cutting the bus bars to enable each intermediate bus bar bearing table to bear a section of intermediate bus bar, wherein at least two intermediate bus bar bearing tables are arranged;

placing a second bus bar on the intermediate bus bar of one of the intermediate bus bar carriers by a second bus bar providing device, and welding the second bus bar and the intermediate bus bar together by a second bus bar welding device.

The second bus bar supply device comprises a second bearing table 44, a second bending mechanism 45 and a second carrying device 48;

the placing of the second bus bar on the intermediate bus bar of one of the intermediate bus bar loading stages by the second bus bar supply device includes:

when the front end of the bus bar is drawn to extend out of the second bearing table 44, cutting the bus bar, wherein the cut bus bar is positioned on the second bearing table 44, and the front end of the cut bus bar extends out of the second bearing table 44;

the second conveying device 48 is controlled to press the bus bars onto the second carrier table 44, the second bending mechanism 48 bends the portions of the bus bars protruding from the second carrier table 44 to form the L-shaped second bus bars, and the second conveying device 48 sucks the second bus bars from the second carrier table 44 and conveys the second bus bars to the middle bus bar of one of the middle bus bar carrier tables.

The providing of the intermediate bus bar by the intermediate bus bar providing device further includes:

and bending the preset end part of the middle bus bar on the middle bus bar bearing platform.

The method for producing the battery pack provided by the utility model can be implemented by adopting the battery pack production equipment, and the specific implementation process refers to the above description.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the utility model, numerous simple modifications can be made to the technical solution of the utility model, including combinations of the individual specific technical features in any suitable way. The utility model is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (7)

1. A battery pack production apparatus, characterized by comprising: the device comprises a welding bearing device, a battery string providing device, a transverse bus bar providing device, a bypass bus bar providing device and a welding device;

the battery string group providing device provides a first battery string group and a second battery string group, wherein the first battery string group and the second battery string group respectively comprise at least two battery strings which are arranged side by side along the width direction of the battery strings;

the transverse bus bar providing device is used for providing a head end bus bar, a tail end bus bar and an intermediate bus bar;

the bypass bus bar providing device is used for providing a bypass bus bar;

the first battery string set, the second battery string set, the head-end bus bar, the tail-end bus bar, the intermediate bus bar, and the bypass bus bar are placed on the welding carrier; the first battery string group and the second battery string group are arranged on the welding bearing device along the length direction of the battery strings; the head end bus bar is stacked below the head end welding strip of the first battery string group, the middle bus bar is stacked below the tail end welding strip of the first battery string group and the head end welding strip of the second battery string group, and the tail end bus bar is stacked below the tail end welding strip of the second battery string group; the bypass bus bar extends along the length direction of the battery string, one end of the bypass bus bar is stacked on the head end bus bar, and the other end of the bypass bus bar is stacked on the tail end bus bar;

the welding device welds the welding strips of the first battery string group and the second battery string group loaded on the welding and loading device with the head end bus bar, the tail end bus bar, the middle bus bar and the bypass bus bar to form a battery assembly;

the bypass bus bar providing device comprises a bypass bus bar bearing device, an insulating tape laying device, a bypass bus bar laying device and a hot-pressing device; the insulating tape laying device is arranged to lay insulating tapes on the bypass bus bar carrying device, the bypass bus bar laying device is arranged to lay bypass bus bars on the insulating tapes of the bypass bus bar carrying device, and the hot-pressing device welds the insulating tapes on the bypass bus bar carrying device and the bypass bus bars together.

2. The battery pack production apparatus according to claim 1, wherein the insulating tape laying device includes a roll of insulating tape located at the first end of the bypass bus bar carrying device, an insulating tape drawing device that draws insulating tape from the roll of insulating tape and moves to a preset position toward the second end of the bypass bus bar carrying device, an insulating tape pressing device that presses the insulating tape, and an insulating tape cutting device that cuts the pressed insulating tape, the cut insulating tape being laid on the bypass bus bar carrying device;

bypass busbar is spread device and is included bypass busbar book, bypass busbar draw gear, bypass busbar closing device and bypass busbar cutting device, bypass busbar book is located bypass busbar load-carrying device's second end, bypass busbar draw gear follows bypass busbar material book draws the busbar and moves towards when bypass busbar load-carrying device's first end moves to preset position, bypass busbar closing device compresses tightly the busbar, bypass busbar cutting device cuts the busbar that compresses tightly, and the bypass busbar that obtains after cutting is spread on bypass busbar loading device's the insulating strip.

3. The battery module production apparatus according to claim 2, wherein the bypass bus bar supply device further includes a first bus bar supply device and a first bus bar welding device;

the first bus bar providing device is configured to provide a first bus bar and place the first bus bar on the bypass bus bar of the bypass bus bar carrying device, the first bus bar welding device welds the first bus bar with the bypass bus bar, and the bypass bus bar providing device provides the bypass bus bar welded with the insulating tape and the first bus bar.

4. The battery module production apparatus according to claim 3, wherein the first bus bar supply device includes a first carrier table, a first bending mechanism, and a first handling device;

the first bearing table is used for bearing a bus bar to be bent, when the bus bar is positioned on the first bearing table and one end of the bus bar extends out of the first bearing table, the first carrying device presses the bus bar onto the first bearing table, and the first bending mechanism bends the part of the bus bar, which extends out of the first bearing table, to form the L-shaped first bus bar;

the first bus bar welding device is arranged at the end position of the second end of the bypass bus bar bearing device and comprises a welding head capable of lifting, when the bypass bus bar traction device draws a bus bar to a preset position from the bypass bus bar coil, the welding head ascends, the first carrying device adsorbs the first bus bar from the first bearing platform and places the first bus bar at the position of the bypass bus bar corresponding to the welding head, and the first carrying device compresses the first bus bar, and the welding head welds the first bus bar on the bypass bus bar.

5. The battery pack production apparatus according to claim 4, wherein the first bus bar supply device further includes a first bus bar drawing device, a first bus bar pressing device, and a first bus bar cutting device;

when the first bus bar traction device pulls the front end of a bus bar to stretch out of the first bearing table, the first bus bar pressing device presses the bus bar pulled by the first bus bar traction device, the first bus bar cutting device cuts the bus bar, and the cut bus bar is located on the first bearing table and the front end stretches out of the first bearing table.

6. The battery module production apparatus according to claim 1, wherein the lateral bus bar providing device includes a head-end bus bar providing device for providing the head-end bus bar, a tail-end bus bar providing device for providing the tail-end bus bar, and an intermediate bus bar providing device for providing the intermediate bus bar;

the middle bus bar providing device comprises at least two middle bus bar bearing tables, a middle bus bar traction device, a middle bus bar cutting device, a second bus bar providing device and a second bus bar welding device, wherein the middle bus bar bearing tables draw primary bus bars towards each middle bus bar bearing table by the middle bus bar traction device and cut by the middle bus bar cutting device, so that each middle bus bar bearing table bears one section of middle bus bar;

the second bus bar providing device places a second bus bar on an intermediate bus bar of one of the intermediate bus bar loading tables, and the second bus bar welding device welds the second bus bar and the intermediate bus bar together;

the intermediate bus bar providing device provides at least two sections of intermediate bus bars to the welding bearing device, wherein the second bus bars are welded on one section of intermediate bus bars.

7. The battery module production apparatus according to claim 6, wherein the second bus bar supply device includes a second carrier table, a second bending mechanism, and a second handling device;

the bus bar is located on the second bearing table, the front end of the bus bar extends out of the second bearing table, the bus bar is pressed on the second bearing table by the second carrying device, the bus bar is bent by the second bending mechanism from the portion, extending out of the second bearing table, of the bus bar to form an L-shaped second bus bar, and the second carrying device absorbs the second bus bar on the second bearing table and carries the second bus bar to one of the middle bus bars of the middle bearing table.

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