CN114447528A - Busbar and battery pack - Google Patents

Abstract

The invention relates to the technical field of batteries and provides a bus bar and a battery pack. The bus bar includes: the bus bar comprises a bus bar body and a bus bar body, wherein the bus bar body comprises at least one bus bar unit, and the bus bar unit comprises a first bus bar piece and a second bus bar piece with opposite polarities; the first confluence piece is provided with a first connection part, the first connection part is provided with a protruding structure, the protruding structure is used for being abutted against the end face of the battery shell serving as the first electrode terminal, the second confluence piece is provided with a second connection part, and the second connection part is used for being abutted against the end face of the pole serving as the second electrode terminal. The protruding structure can make up the difference in height that exists between the casing terminal surface of battery and the utmost point post to realize the effective connection between busbar and the battery. Meanwhile, the first bus piece and the second bus piece are arranged on the same layer, and the occupied space of the bus can be reduced along the arrangement direction of the batteries and the bus body, so that the space utilization rate in the battery pack can be improved.

Description

A busbar and battery pack

technical field

The present invention relates to the technical field of batteries, in particular to a bus bar and a battery pack.

Background technique

There are several batteries in the battery pack, and multiple battery cells are connected in series and parallel to achieve the voltage and capacity required by the product. When using the battery pack, it is necessary to use a positive-polarity busbar and a negative-polarity busbar to connect the batteries, so as to derive signals such as voltage in the battery pack.

However, the existing positive-polarity busbars and negative-polarity busbars are stacked and arranged, which occupies a large space and is not conducive to the miniaturized design of the battery pack.

SUMMARY OF THE INVENTION

The present application provides a bus bar and a battery pack, so as to reduce the volume of the bus bar and improve the space utilization rate in the battery pack.

In order to achieve the above purpose, the application provides the following technical solutions:

According to a first aspect of the present application, there is provided a bus bar, comprising: a bus bar body, the bus bar body includes at least one bus unit, and the bus unit includes a first bus piece and a second bus with opposite polarities items, including:

The first bus piece is provided with a first connecting portion, and the first connecting portion is formed with a protruding structure, and the protruding structure is used for abutting with the end face of the battery case serving as the first electrode terminal;

The second busbar is provided with a second connecting portion, and the second connecting portion is used for abutting with the end face of the pole serving as the second electrode terminal, and the end face of the pole and the end face of the battery case on the same side of the battery.

The bus bar provided by the present application includes at least one bus unit, and the bus unit includes a first bus element and a second bus element with opposite polarities. When applying the busbar provided by the present application, the busbar body can be arranged on the side of the lead-out pole of the battery, the first connection part of the first busbar is used to connect the first electrode terminal of the battery, and the first connection part of the second busbar is used to connect the first electrode terminal of the battery. The two connecting parts are connected to the second electrode terminal of the battery. Specifically, the protruding structure formed on the first connecting portion and protruding toward the battery direction is in contact with the end surface of the battery case as the lead-out portion of the first electrode terminal, and the second connecting portion is in contact with the electrode as the lead-out portion of the second electrode terminal. The end face of the column abuts.

It is worth noting that, in the bus bar provided by the present application, the raised structure can compensate for the height difference existing between the end face of the battery case and the pole, so as to realize the effective connection between the bus bar and the battery. At the same time, the first busbar and the second busbar are arranged on the same layer, which can reduce the space occupied by the busbar along the arrangement direction of the battery and the busbar body, thereby improving the space utilization rate in the battery pack.

According to a second aspect of the present application, there is provided a battery pack including the busbar as provided in any of the above technical solutions.

In the battery pack provided by the present application, the bus bar includes at least one bus unit, and the bus unit includes a first bus element and a second bus element with opposite polarities. When applying the busbar provided by the present application, the busbar body can be arranged on the side of the lead-out pole of the battery, the first connection part of the first busbar is used to connect the first electrode terminal of the battery, and the first connection part of the second busbar is used to connect the first electrode terminal of the battery. The two connecting parts are connected to the second electrode terminal of the battery. Specifically, the protruding structure formed on the first connecting portion and protruding toward the battery direction is in contact with the end surface of the battery case as the lead-out portion of the first electrode terminal, and the second connecting portion is in contact with the electrode as the lead-out portion of the second electrode terminal. The end face of the column abuts.

It is worth noting that, in the battery pack provided by the present application, the protruding structure can make up for the height difference existing between the end face of the battery case and the pole, so as to realize the effective connection between the bus bar and the battery. At the same time, the first busbar and the second busbar are arranged on the same layer, which can reduce the space occupied by the busbar along the arrangement direction of the battery and the busbar body, thereby improving the space utilization rate in the battery pack.

Description of drawings

For a better understanding of the present disclosure, reference may be made to the embodiments shown in the following figures. Components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. Additionally, the relevant elements or components may be arranged differently as known in the art. Furthermore, in the drawings, the same reference numerals refer to the same or similar parts throughout the various figures. in:

1 is a schematic structural diagram of a battery pack provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a bus bar provided in an embodiment of the present application;

Fig. 3 is the exploded schematic diagram of the structure in Fig. 1;

FIG. 4 is an enlarged schematic view of the first confluence piece in FIG. 3;

FIG. 5 is a schematic structural diagram of a fixing member in an embodiment of the present application.

The reference numerals are explained as follows:

10-first busbar; 11-first connection part; 20-second busbar; 21-second connection part; 30-battery; 31-first electrode terminal; 32-second electrode terminal; 40-extension section ; 41 - profiling gap; 50 - bending part; 60 - fixing part; 61 - first placement space; 62 - second placement space; 63 - first hollow part; 64 - second hollow part; 65 - first Snap-on buckle; 66-second snap-on clip; 67-first snap-on board.

Detailed ways

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, so it should be understood that various modifications may be made to the example embodiments without departing from the scope of the present disclosure. modifications and changes.

In the description of the present disclosure, unless otherwise explicitly specified and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be construed as indicating or implying relative importance; the term "plurality" is a means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the/said" or "an" object is also intended to mean one of the possible plurality of such objects.

Unless otherwise specified or stated, the terms "connected", "fixed", etc. should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection, or a signal connection. Connection; "connection" can be directly connected or indirectly connected through an intermediary. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

Further, in the description of the present disclosure, it should be understood that the directional terms "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are from the angles shown in the drawings. described, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being connected "on", "under", or "inside" or "outside" another element(s), it can not only be directly connected "On", "under" or "inside", "outside" another element(s), or indirectly connected "on", "under" or "outside" another element(s) through intervening elements inside and outside".

Embodiments of the present application provide a battery pack. FIG. 1 is a schematic structural diagram of a battery pack provided by an embodiment of the present application. With the structure shown in FIG. 1 , the battery pack provided by the embodiment of the present application includes a bus bar, and an exemplary structure of the bus bar is shown in FIG. 2 .

Please continue to refer to the structure shown in FIG. 1 , the battery pack provided by the embodiment of the present application further includes a plurality of batteries 30 , and a bus bar is arranged on one side of the batteries 30 and connected to the batteries 30 to connect a plurality of batteries connected in series or in parallel. Signal export within 30. Exemplarily, one end of the circuit board is connected to the bus bar, and the other end is connected to an external output port, so as to output the collected signal from the bus bar. The circuit board can be a flexible printed circuit (FPC), so as to facilitate the installation operation of the circuit board. Of course, circuit boards of other structures can also be selected according to requirements, which will not be repeated here.

FIG. 3 is an exploded schematic diagram of the battery pack in FIG. 1 . In the structure shown in FIG. 3 , exemplarily, a plurality of batteries 30 are arranged along the first direction, and the batteries 30 between adjacent rows are staggered. It is worth noting that, in FIG. 3 , nine batteries 30 are used to form one battery unit (structure within the dashed frame), and two adjacent battery units along the first direction are staggered. Of course, the number and structural arrangement of the batteries 30 in the battery pack are not limited to the structure shown in FIG. 3 , and will not be repeated here.

Please continue to refer to the structure shown in FIG. 3 , in one embodiment, the battery 30 may be a cylindrical battery. Of course, the battery 30 may also be a square battery, which will not be repeated here. Please continue to refer to the structure shown in FIG. 3 , each battery 30 includes a first electrode terminal 31 and a second electrode terminal 32 . Taking the battery 30 in FIG. 3 as an example, the first electrode terminal 31 is a battery casing, the second electrode terminal 32 is a pole post, and at least part of the pole post protrudes from the battery casing, wherein the lead out of the battery casing is: The end face of the battery case, the lead out of the pole post is the end face of the pole post protruding from the battery case, the end face of the battery case and the end face of the pole post are located on the same side of the battery 30, and the end face of the pole post is higher than the end face of the battery case . It should be understood that the explosion direction of each structural member in the schematic explosion diagram in FIG. 3 is parallel to the extension direction of the pole axis line, and this direction is exemplarily defined as the second direction.

It is worth noting that the polarities of the first electrode terminal 31 and the second electrode terminal 32 are opposite, and the two are insulated from each other. Specifically, when the first electrode terminal 31 is a positive polarity terminal, the second electrode terminal 32 is a negative polarity terminal, and conversely, when the first electrode terminal 31 is a negative polarity terminal, the second electrode terminal 32 is a positive polarity terminal.

Exemplarily, the following description will be given by taking the first electrode terminal 31 as a negative polarity terminal and the second electrode terminal 32 as a positive polarity terminal as an example.

It should be noted that the busbars in the battery pack provided by the embodiments of the present application are the busbars in any of the following technical solutions.

Referring to the structures shown in FIG. 2 and FIG. 3 , the busbar provided in the embodiment of the present application is disposed on the side of the lead-out pole of the battery 30 , and the busbar includes a busbar body, the busbar body includes at least one busbar unit, and the busbar unit includes A first bus 10 and a second bus 20 of opposite polarity, wherein:

The first busbar 10 is provided with a first connecting portion 11, and the first connecting portion 11 is formed with a protruding structure, and the protruding structure is used for abutting with the end face of the battery case serving as the first electrode terminal 31;

The second busbar 20 is provided with a second connection portion 21 , and the second connection portion 21 is used for abutting with the end surface of the pole serving as the second electrode terminal 32 , and the end surface of the pole and the end surface of the battery case are located at the end of the battery 30 . same side.

When applying the busbar provided in the embodiment of the present application, the busbar body can be arranged on the side of the lead-out pole of the battery 30, and the first connection part 11 of the first bus piece 10 is used to connect the first electrode terminal 31 of the battery 30, The second electrode terminal 32 of the battery 30 is connected to the second connection portion 21 of the second busbar 20 . The first bus bar 10 and the first electrode terminal 31 have the same polarity, and the second bus bar 20 and the second electrode terminal 32 have the same polarity. Exemplarily, the first bus element 10 is a negative polarity bus portion, and the second bus element 20 is a positive polarity bus portion.

It should be noted that the protruding structure formed on the first connecting portion 11 and protruding toward the direction of the battery 30 is in contact with the end surface of the battery case, which is the lead-out portion of the first electrode terminal 31, and the second connecting portion 21 is connected to the second electrode. The end surfaces of the poles where the terminals 32 are drawn are in contact with each other.

It is worth noting that, in the bus bar provided by the embodiment of the present application, the raised structure can compensate for the height difference between the end face of the battery case and the pole in the second direction, so as to realize the effective connection between the bus bar and the battery 30 . . Meanwhile, the first busbar 10 and the second busbar 20 are disposed on the same layer, which can reduce the space occupied by the busbar along the arrangement direction of the battery 30 and the busbar body, thereby improving the space utilization rate in the battery pack.

In one embodiment, please continue to refer to the structure shown in FIG. 3 , each first bus element 10 corresponds to one battery cell, and each first bus element 10 is at a position corresponding to each battery 30 in the battery cell. A first connecting portion 11 is provided. Exemplarily, the first bus element 10 is provided with a first connecting portion 11 at a position corresponding to an end face of the casing of the battery 30 . Likewise, each second busbar 20 corresponds to the same battery cell, and each second busbar 20 is provided with a second connection portion 21 at a position corresponding to each battery 30 in the battery cell. Exemplarily, the second bus element 20 is provided with a second connection portion 21 at a position corresponding to the pole of the battery 30 .

In one embodiment, the protruding structure may be stamped and formed from the plate body forming the first busbar 10 . Specifically, please refer to the structure shown in FIG. 4 , the side of the convex structure facing the end surface of the battery case is a convex structure, and the side of the end surface away from the battery case is a concave structure. It should be noted that this preparation form can simplify the preparation process and facilitate the welding operation between the protruding structure and the end face of the battery case.

Specifically, for example, when connecting the first bus piece 10 and the end face of the battery case, penetration welding can be used, the welding torch enters from the side of the concave structure of the protruding structure, passes through the protruding structure, and connects the The protruding structure is welded with the end face of the battery case. It should be understood that this connection manner can enhance the stability of the connection between the first bus bar 10 and the first electrode terminal 31 .

Please refer to the structure shown in FIG. 4 , it should be noted that the range of the protruding size h of the protruding structure needs to be adjusted according to the height of the pole, so as to meet the requirement that the pole is exactly in contact with the second pole while the protruding structure is in contact with the battery case. The connection portion 21 is in contact. Exemplarily, it can be set that, along the second direction, the protruding height of the protruding structure is 0<h≤6mm, so as to adapt to the height difference between the pole and the battery case. Exemplarily, the h value can be set to 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, and 6 mm.

In one embodiment, the vertical projection of the protruding structure on the end face of the casing extends along the circumference of the casing.

Please continue to refer to the structure shown in FIG. 3 , when the battery 30 is a cylindrical battery. The battery case may be cylindrical, and the projection of the convex structure on the end face of the battery case is an arc, and the arc is adapted to the shape of the battery case. Exemplarily, the arc is provided along the rounded edge of the end face of the housing. Of course, in order to ensure the effective connection between the protruding structure and the end face of the battery case, a certain gap may be provided between the outer edge of the arc and the outer edge of the end face of the battery case.

In one embodiment, please continue to refer to the structure shown in FIG. 4 , in each bus unit, the first bus element 10 includes two oppositely arranged extension sections 40 , and the extension direction of each extension section 40 is perpendicular to two extensions. The arrangement direction of the segments 40, specifically, each extending segment 40 corresponds to a row of batteries 30 in one battery unit.

Please continue to refer to the structures shown in FIGS. 1 and 2 , taking the battery 30 as a cylindrical battery as an example, along the arrangement direction of the two extending sections 40 , the second busbar 20 is placed between the two extending sections 40 . Of course, the battery 30 can also be a square battery, which will not be repeated here.

It should be noted that the second confluence piece 20 is placed between the two extension sections 40, so that the first confluence piece 10 and the second confluence piece 20 can be placed on the same layer, so as to prevent the first confluence piece 10 and the The second busbars 20 are arranged in layers, so that the space occupied in the second direction along the busbar body can be reduced, so as to improve the space utilization rate in the battery 30 .

In one embodiment, each extension segment 40 is provided with an escape opening on one side facing the other extension segment 40 , and the escape opening is used to escape the pole in the battery 30 corresponding to the escape opening. Exemplarily, after the busbar and the battery 30 are assembled, the escape opening and the side edge of the pole have a certain gap, and the gap can prevent the first busbar 10 from accidentally touching the pole, so as to avoid the internal short circuit of the battery 30, so as to improve the performance of the battery 30. Stability of battery 30. Of course, when the battery 30 is a square battery, the extension section 40 may be far away from the pole, so the extension section 40 may not be provided with an escape opening, which can be set according to requirements, and will not be repeated here.

In one embodiment, please continue to refer to the structure shown in FIG. 4 , along the extending direction of each extension segment 40 , a side of the extension segment 40 facing away from the other extension segment 40 is provided with a profiled notch 41 , and the profiled notch 41 is provided. 41 corresponds to the shape of the gap between adjacent cells 30 .

It should be noted that since there may be gaps between the casings of adjacent batteries 30 in the battery unit, a contoured notch 41 can be formed at the position of each extension 40 corresponding to the corresponding part to reduce the weight of the bus bar and increase the size of the battery 30 The internal heat dissipation area enables the first connecting portion 11 to adapt to a certain height difference. Specifically, the extension section 40 is provided with a profiling notch 41, so that the extension section 40 can have a certain amount of elastic deformation, so that there can be slight deformation in the height direction, so as to facilitate the welding operation.

Exemplarily, each single cell 30 in the battery unit is cylindrical, and a gap (filled with dots) as shown in FIG. 3 exists between the casings of adjacent cells 30 in each row. The contoured notch 41 is the same as or similar to the projection of the gap in the second direction.

It is worth noting that, in a specific embodiment, it can be set that: along the second direction, the vertical projection of the profiling notch 41 can be larger than the vertical projection of the gap, so as to ensure the gap between the first busbar 10 and the end face of the battery case. The corresponding area is sufficient and can be effectively connected. In another specific embodiment, it can be set that along the second direction, the vertical projection of the profiling notch 41 can be smaller than the vertical projection of the gap, so as to reduce the weight of the bus bar, thereby reducing the overall weight of the battery 30 .

Of course, in another specific embodiment, it can also be set: along the second direction, the vertical projection of the profiling notch 41 is the same as the vertical projection of the gap, so as to reduce the weight of the bus bar, increase the internal heat dissipation area of the battery 30, and ensure that the The corresponding area between the first bus piece 10 and the end face of the battery case is sufficient and can be effectively connected.

Please continue to refer to the structure shown in FIG. 2 and FIG. 3 , the shape of the second connecting portion 21 of the second bus bar 20 can be set to be similar to the shape of the second electrode terminal 32 to ensure that the second connecting portion 21 and the second electrode The connection area of the terminal 32 ensures the overcurrent area and improves the overcurrent capability.

Exemplarily, the second electrode terminal 32 is a pole, and the second connecting portion 21 is a quasi-circular shape similar to the circular end surface of the pole. It should be understood that the second connecting portion 21 is generally a circular structure. Since the second busbar 20 needs to be connected to the poles of a plurality of batteries 30 in the same battery unit, the plurality of second connecting portions 21 can be connected by a main body structure. , the shape of the second connecting portion 21 is slightly deformed at the connecting portion, forming a quasi-circular shape.

It is worth noting that, the connection between the second connection portion 21 and the second electrode terminal 32 may be connected by laser welding. In a specific embodiment, a positioning hole may be provided on the second connecting portion 21 so that the laser device can be positioned accurately and the welding accuracy can be improved.

Please continue to refer to the structures shown in FIGS. 1 to 3 , taking a battery unit as an example, the batteries 30 in each battery unit are connected in parallel by the bus bars provided in the embodiments of the present application.

Specifically, taking the first battery cell as an example along the first direction, the same second busbar 20 is connected to the second electrode terminals 32 of the nine batteries 30 in the same battery cell, and the same first busbar 10 is connected to the 9 cells in the battery cell. The first electrode terminal 31 of each battery 30 is insulated from the first bus element 10 and the second bus element 20 , and the nine batteries 30 are arranged in parallel in the battery unit.

Adjacent battery cells are connected in series by bus bars. Specifically, the first bus element 10 of one bus unit and the second bus element 20 of the other bus unit in the adjacent bus units have an integrated structure, or, adjacent bus units The second manifold 20 of one manifold unit and the first manifold 10 of the other manifold unit have an integral structure. Exemplarily, along the first direction, taking two adjacent battery cells as an example, the second busbar 20 connected to the previous battery cell is connected to the first busbar 10 connected to the latter battery cell, that is, the The second polarity structure is connected to the first polarity structure of the next battery unit, and the adjacent battery units are connected in series.

It is worth noting that different series and parallel connection of multiple cells 30 in the battery pack can make the battery pack meet the voltage and capacity required by the product to meet the demand.

It should be understood that the connection structure between the second busbar 20 and the first busbar 10 corresponding to the adjacent battery cells can be formed by an integral molding process, so as to simplify the installation and preparation process and improve the efficiency. At the same time, it is worth noting that the integral molding arrangement can increase the connection area between the second busbar 20 and the first busbar 10 corresponding to adjacent battery cells, so as to increase the flow area and ensure the flow capacity.

Of course, other structures can also be used to connect the second bus members 20 and the first bus members 10 corresponding to adjacent battery cells. Exemplarily, a connecting plate or a connecting wire can be used to connect, which will not be repeated here.

Please continue to refer to the structure shown in FIG. 4 , the bus bar provided by the embodiment of the present application is further provided with a bent portion 50 , and the bent portion 50 is used for fixing the bus bar body. Exemplarily, the bent portion 50 can be connected with the first bus 10 or the second bus 20 . Specifically, when one end of the first busbar 10 is located at the most edge position, the busbar body can be fixed on the box housing the battery 30 through the bent portion 50 .

It should be understood that there may be an included angle between the bent portion 50 and the first busbar 10 or the second busbar 20 to better adapt to the space arrangement of the box, or to match the arrangement shape of the batteries 30 in the battery unit.

In one embodiment, please continue to refer to the structures shown in FIG. 1 and FIG. 3 , the bus bar provided by the embodiment of the present application further includes a fixing member 60 , and the fixing member 60 is used for supporting the first bus bar 10 of the bus bar body. and the second busbar 20 .

It should be noted that, by using the fixing member 60, the installation operation of the first bus member 10 and the second bus member 20 can be facilitated. Specifically, during the installation process, it is only necessary to move the fixing member 60 , the first manifold member 10 and the second manifold member 20 as a whole, which can simplify the installation process and improve the assembly efficiency. Meanwhile, in the battery pack provided by the embodiment of the present application, the fixing member 60 can pre-fix the positions of the first bus member 10 and the second bus member 20 to lift the first bus member 10 and the second bus member 20 and the battery 30 The accuracy of connection alignment.

In a specific embodiment, as shown in FIG. 5 , in the fixing member 60 provided in the embodiment of the present application, a first placing space 61 and a second placing space 62 are provided on one side of the fixing member 60 . A first hollow portion 63 is partially provided in the first placement space 61 , and at the same time, a second hollow portion 64 is partially provided in the second placement space 62 of the fixing member 60 .

Specifically, the first bus 10 can be placed in the first placement space 61 , and the second bus 20 can be placed in the second placement space 62 . Meanwhile, when the bus unit is used to realize the parallel connection of multiple batteries 30 in the battery unit, the first bus 10 is used to connect the first electrode terminals 31 of the multiple batteries 30 , and the second bus 20 is used to connect the multiple batteries 30 . The second electrode terminal 32; the first placement space 61 and the second placement space 62 can be insulated to avoid short circuit between the first bus element 10 and the second bus element 20 in the bus unit.

It should be understood that the shape of the first placement space 61 is the same as or similar to that of the first bus bar 10 . Exemplarily, the first placement space 61 may be set to match the shape of the first busbar 10 . Alternatively, the first placement space 61 may be set to be larger in volume than the first bus bar 10 . Of course, similar settings can be made between the second placement space 62 and the second bus element 20 , and details are not described herein again.

It is worth noting that when the structure of the first hollow portion 63 is provided, the shape of the first hollow portion 63 can be set larger than the shape of the protruding structure, so that the protruding structure extends into the first hollow portion 63 from the side away from the battery 30 to Connect to the end face of the battery case. As shown in FIG. 3 , FIG. 5 and FIG. 4 , exemplarily, in a specific embodiment, the shape of the first hollow portion 63 on the fixing member 60 is adapted to the shape of the protruding structure. It should be understood that this structure arrangement can enhance the strength of the fixing member 60 on the basis of ensuring the effective connection between the protruding structure and the battery 30 .

Please continue to refer to the structures shown in FIGS. 3 to 5 , when the second hollow portion 64 is disposed, the shape of the pole post of the battery 30 may be similar. Exemplarily, the second hollow portion 64 is a circular structure concentric with the pole, and the area of the second hollow 64 is not smaller than the area of the pole. It should be understood that this structural arrangement can ensure that the connection area between the second connection portion 21 and the pole can be maximized, so as to improve the stability of the connection between the second busbar 20 and the battery 30 .

Of course, the second hollow portion 64 can be set to other structures and shapes, which will not be repeated here.

In a specific embodiment, please continue to refer to the structure shown in FIG. 3 , the fixing member 60 is provided between the battery 30 and the bus bar body, and the first placement space 61 and the second placement space 62 are provided in the fixing member 60 . The side facing away from the battery 30 .

It should be understood that in this specific embodiment, the first busbar 10 and the second busbar 20 are fixed by the fixing member 60 , and the first busbar 10 and the second busbar 20 are positioned relative to the battery 30 through the fixing member 60 to correct the position .

Meanwhile, by setting the depths of the first placement space 61 and the second placement space 62 along the second direction, the surfaces of the first bus bar 10 and the second bus bar 20 facing away from the battery 30 can be coplanar. It is worth noting that the "coplanarity" includes complete coplanarity or approximately coplanarity. Due to the influence of the manufacturing process, there may be a possibility that there is a slight height difference between the first busbar 10 and the second busbar 20 on this side.

Of course, in another specific embodiment, the first placement space 61 and the second placement space 62 can also be set on the side of the fixing member 60 facing the battery 30, so that the busbar body can be quickly installed by using the fixing member 60, The details are not repeated here.

It should be noted that, when the fixing member 60 is disposed between the battery 30 and the bus bar body, after the fixing member 60 provided by the embodiment of the present application is used to fix the first bus member 10 and the second bus member 20, the first bus member 10 and the second bus member 20 can be The first hollow portion 63 corresponding to the connection portion 11 realizes the connection operation between the first busbar 10 and the battery 30 . Meanwhile, the connection operation between the second busbar 20 and the battery 30 can be realized through the second hollow portion 64 corresponding to the second connection portion 21 .

In one embodiment, in order to achieve insulation between the first placement space 61 and the second placement space 62 , the fixing member 60 may be configured to include an insulating member. Specifically, the fixing member 60 may be set as an insulating structure as a whole, or it may be set that the fixing member 60 is partially made of insulating material or covered with insulating material.

It should be noted that when the fixing member 60 is an insulating structure as a whole, the insulating effect between the first placement space 61 and the second placement space 62 can be better ensured, so that short-circuit phenomenon can be avoided and the safety of the battery 30 can be improved. performance.

When specifically setting the structure of the fixing member 60, in one embodiment, the fixing member 60 may be set to include a body and a separation rib disposed on one side of the body, and the separation rib separates the body from the first placement space 61 and the second placement space 62. , as shown in Figure 5.

It should be noted that the structure of separating the first placement space 61 and the second placement space 62 on one side of the main body by the separating ribs makes the overall structure of the fixing member 60 simple, thereby simplifying the manufacturing process and improving the manufacturing efficiency.

It should be understood that, when disposing the separating rib, the first placing space 61 and the second placing space 62 may share a part of the separating rib. Of course, the first placement space 61 and the second placement space 62 may also be separated by independent separation ribs, which will not be repeated here.

It should be noted that, in order to prevent the busbar body from falling out of the fixing member 60 , various structural arrangements can be selected to assist in fixing the busbar body and the fixing member 60 .

In one embodiment, the fixing member 60 and the bus bar body can be fixed by using a snap-fit structure.

Exemplarily, a first snap-fit buckle 65 may be provided near the first placement space 61 to fix the first busbar 10 in the first placement space 61 .

It should be noted that, this structural arrangement can prevent the first busbar 10 from falling out of the first placement space 61 and enhance the stability of the first busbar 10 in the first placement space 61 .

In a specific embodiment, the separation rib forming the first placement space 61 is provided with a first snap-fit buckle 65 .

In another specific embodiment, a first snap-fit buckle 65 is provided in the first placement space 61 .

In another specific embodiment, the separation rib forming the first placement space 61 and the first snap-fit buckle 65 are provided in the first placement space 61 .

It should be understood that when both the first placement space 61 and the partition ribs are provided with the first snap-fit buckles 65 , the stability of the first busbar 10 in the first placement space 61 can be improved.

It should be noted that, the number and setting positions of the first snap-fit buckles 65 can be set as required. Exemplarily, a plurality of first snap-fit buckles 65 may be arranged to be separated and arranged along the extending direction of the separation rib or the first placement space 61 , so as to fix the first busbar 10 at multiple locations and improve the stability of the first busbar 10 . .

When specifically setting the structure of the first clip 65, as shown in FIG. 5, the first clip 65 may be formed by a first clip plate 67, and the first clip plate 67 includes a connecting portion and a clip portion, The clamping part is used for clamping the first bus piece 10; one end of the connecting part is connected to the clamping part, the other end is connected to the bottom of the notch of the separating rib, and there is a gap between the connecting part and the side wall of the notch.

It is worth noting that, when the first clip 65 is formed by the first clip plate 67, since there is a gap between the first clip plate 67 and the side wall of the notch, the relative position of the first clip 65 can be increased. The deformation of the body is convenient for the first bus 10 to move into or out of the first placement space 61 .

Exemplarily, a second snap-fit buckle 66 may be provided near the second placement space 62 to fix the second busbar 20 in the second placement space 62 .

It should be noted that this structural arrangement can prevent the second bussing piece 20 from coming out of the second placing space 62 , and can enhance the stability of the second bussing piece 20 after being placed in the second placing space 62 .

In a specific embodiment, the partition rib forming the second placement space 62 is provided with a second snap-fit buckle 66 .

In another specific embodiment, a second snap-fit buckle 66 is provided in the second placement space 62 .

In another specific embodiment, the partition ribs forming the second placement space 62 and the second engagement buckles 66 are provided in the second placement space 62 .

It should be understood that when both the second placement space 62 and the partition ribs are provided with the second snap-fit buckles 66 , the stability of the second busbar 20 in the first placement space 61 can be improved.

Likewise, the number and the setting positions of the second snap-fit buckles 66 can be set according to requirements, and details are not described herein again.

In another embodiment, an adhesive connection is used between the bus bar body and the fixing member 60 . It should be understood that the adhesive connection form is simple and easy to operate, and can reduce the difficulty of assembly operation.

In another embodiment, the busbar body and the fixing member 60 are connected by riveting. Exemplarily, a hot riveting connection can be used. It should be understood that the riveted connection form can enhance the stability of the assembly of the bus bar body and the fixing member 60 .

Of course, any combination of clipping, bonding or riveting can also be used to fix the fixing member 60 and the bus bar body to improve the stability of the two after they are assembled, which will not be repeated here.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the inventions disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this disclosure and include common knowledge or techniques in the technical field not disclosed by this disclosure . The specification and example embodiments are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the appended claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of protection of the present disclosure is limited only by the appended claims.

Claims (11)

1. A bus bar, comprising: busbar body comprising at least one busbar unit comprising a first (10) and a second (20) busbar piece of opposite polarity, wherein:

the first bus bar (10) is provided with a first connection portion (11), the first connection portion (11) being formed with a projection structure for abutting against an end face of a battery case as a first electrode terminal (31);

the second confluence piece (20) is provided with a second connecting portion (21), the second connecting portion (21) is used for being abutted to the end face of a pole serving as a second electrode terminal (32), and the end face of the pole is located on the same side of the battery (30) as the end face of the battery shell.

2. Busbar according to claim 1, characterized in that the raised structure is integrally stamped and formed from the first busbar part (10).

3. The busbar according to claim 1 or 2, wherein a perpendicular projection of the projection structure on the end face of the cell housing extends in a circumferential direction of the cell housing.

4. The busbar according to claim 1 or 2, wherein, in the busbar unit,

the first confluence piece (10) comprises two oppositely arranged extension sections (40), and the extension direction of each extension section (40) is perpendicular to the arrangement direction of the two extension sections (40);

the second bus bar (20) is interposed between the two extending sections (40) in the arrangement direction of the two extending sections (40).

5. The busbar according to claim 4, wherein each extension section (40) is provided with an avoidance opening on a side facing the other extension section (40), and the avoidance openings are used for avoiding poles in the corresponding batteries (30).

6. The busbar according to claim 1 or 2, further comprising a fixing piece (60), the fixing piece (60) carrying the first and second bus bars (10, 20).

7. The busbar according to claim 6, wherein the fixing member (60) is provided between the battery (30) and the busbar body, and the fixing member (60) is provided with a first hollowed-out portion (63) corresponding to the first connecting portion (11), and the fixing member (60) is provided with a second hollowed-out portion (64) corresponding to the second connecting portion (21).

8. The busbar according to claim 7, wherein when the busbar unit is used to realize a plurality of the batteries (30) in parallel, the first busbar member (10) is used to connect first electrode terminals (31) of the plurality of the batteries (30), and the second busbar member (20) is used to connect second electrode terminals (32) of the plurality of the batteries (30);

the fixing member (60) includes an insulating member through which the first bus bar (10) and the second bus bar (20) in the bus bar unit are arranged to be insulated.

9. A battery pack characterized by comprising the bus bar according to any one of claims 1 to 8.

10. The battery pack according to claim 9, further comprising a battery (30), the battery (30) comprising a battery case as a first electrode terminal (31) and a pole as a second electrode terminal (32), the first electrode terminal (31) being of opposite polarity to the second electrode terminal (32);

the busbar is located battery (30) sets up utmost point post one side, just first piece (10) of converging of busbar with battery case's terminal surface butt, second piece (20) of converging of busbar with the terminal surface butt of utmost point post, just battery case's terminal surface with the terminal surface of utmost point post is located same one side of battery (30).

11. Battery pack according to claim 10, characterized in that the battery (30) is a cylindrical battery.

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