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

Busbar and battery pack

Technical Field

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

Background

A plurality of batteries are arranged in the battery pack, and a plurality of battery monomers are connected in series-parallel connection to achieve the voltage and capacity required by the product. When using the battery pack, it is necessary to connect the batteries using the positive bus bar and the negative bus bar to derive signals such as the voltage in the battery pack.

However, the conventional positive bus bar and the conventional negative bus bar are stacked, which occupies a large space and is not favorable for the miniaturization design of the battery pack.

Disclosure of Invention

The application provides a busbar and group battery to reduce the busbar volume, promote group battery space utilization ratio.

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

according to a first aspect of the present application, there is provided a bus bar including: a busbar body comprising at least one busbar unit comprising first and second busbars of opposite polarity, wherein:

the first bus bar is provided with a first connecting portion formed with a convex structure for abutting against an end face of a battery case as a first electrode terminal;

the second converges and is equipped with the second connecting portion, the second connecting portion are used for with the terminal surface butt of the utmost point post as second electrode terminal, just the terminal surface of utmost point post with battery case's terminal surface is located same one side of battery.

The bus bar provided by the application comprises at least one bus unit, wherein the bus unit comprises a first bus piece and a second bus piece with opposite polarities. When the bus bar provided by the application is applied, the bus bar body can be arranged on one side of the battery leading-out pole, the first connecting part of the first bus piece is adopted to be connected with the first electrode terminal of the battery, and the second connecting part of the second bus piece is adopted to be connected with the second electrode terminal of the battery. Specifically, the protruding structure formed on the first connection portion and protruding in the battery direction abuts against the end surface of the battery case as the first electrode terminal lead-out portion, and the second connection portion abuts against the end surface of the electrode post as the second electrode terminal lead-out portion.

It is worth noting that in the busbar provided by the application, the protruding structure can make up for the height difference existing between the end face of the battery shell and the pole, so as to realize the effective connection between the 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.

According to a second aspect of the present application, there is provided a battery pack including the bus bar provided in any of the above-described aspects.

In the battery pack provided by the application, the bus bar 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. When the bus bar provided by the application is applied, the bus bar body can be arranged on one side of the battery leading-out pole, the first connecting part of the first bus piece is adopted to be connected with the first electrode terminal of the battery, and the second connecting part of the second bus piece is adopted to be connected with the second electrode terminal of the battery. Specifically, the protruding structure formed on the first connection portion and protruding in the battery direction abuts against the end surface of the battery case as the first electrode terminal lead-out portion, and the second connection portion abuts against the end surface of the electrode post as the second electrode terminal lead-out portion.

It is worth noting that in the battery pack provided by the application, the protruding structure can make up for the height difference existing between the end face of the battery shell and the pole, so as to realize the effective connection between the bus bar 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.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The 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. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

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

fig. 2 is a schematic structural diagram of a bus bar according to an embodiment of the present disclosure;

FIG. 3 is an exploded view of the structure of FIG. 1;

FIG. 4 is an enlarged schematic view of the first bus bar of 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 below:

10-a first bus bar; 11-a first connection; 20-a second bus bar; 21-a second connection; 30-a battery; 31 — a first electrode terminal; 32-a second electrode terminal; 40-an extension; 41-a profiling notch; 50-bending part; 60-a fixing member; 61-a first placement space; 62-a second placement space; 63-a first hollowed-out portion; 64-a second hollowed-out portion; 65-a first snap fastener; 66-a second snap fastener; 67-first snap plate.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the 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, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" 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" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and encompass, for example, a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, 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 "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

The embodiment of the application provides a battery pack. Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present disclosure. As shown in fig. 1, the battery pack provided by the embodiment of the present application includes a bus bar, and the structure of the bus bar is exemplarily shown in fig. 2.

With continuing reference to the structure shown in fig. 1, the battery pack provided in the embodiment of the present application further includes a plurality of batteries 30, and the bus bar is disposed at one side of the batteries 30 and connected to the batteries 30 to lead out signals in the plurality of batteries 30 connected in series or in parallel. Illustratively, one end of the circuit board is connected with the bus bar, and the other end of the circuit board is connected with the external output port so as to output the bus bar acquisition signal. The wiring board may be a Flexible Printed Circuit (FPC) board to facilitate the mounting operation of the wiring board. Of course, circuit boards with other structures can be selected according to requirements, and are not described in detail herein.

Fig. 3 is an exploded view of the battery pack of fig. 1. As shown in the structure of fig. 3, a plurality of cells 30 are arranged in a first direction, and the cells 30 between adjacent rows are staggered, as an example. It is noted that one cell unit (a dotted-line frame inner structure) is formed with 9 cells 30 in fig. 3, and two adjacent cell units in the first direction are arranged alternately. Of course, the number of the cells 30 in the battery pack and the structural arrangement are not limited to the structure shown in fig. 3, and are not described in detail herein.

With continued reference 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 is not described in detail herein. With continued reference to the structure shown in fig. 3, each cell 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 housing, the second electrode terminal 32 is a terminal, and at least a portion of the terminal protrudes out of the battery housing, wherein the leading-out portion of the battery housing is an end surface of the battery housing, the leading-out portion of the terminal is an end surface of the terminal protruding out of the battery housing, the end surface of the battery housing and the end surface of the terminal are located on the same side of the battery 30, and the end surface of the terminal is higher than the end surface of the battery housing. It should be understood that the explosion direction of each structural member in the explosion diagram of fig. 3 is parallel to the extending direction of the axial line of the pole, and the direction is exemplarily defined as the second direction.

It should be noted that the first electrode terminal 31 and the second electrode terminal 32 have opposite polarities and 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, whereas when the first electrode terminal 31 is a negative polarity terminal, the second electrode terminal 32 is a positive polarity terminal.

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

It should be noted that the bus bar in the battery pack provided in the embodiment of the present application is a bus bar in any of the following technical solutions.

Referring to the structures shown in fig. 2 and fig. 3, the bus bar provided in the embodiment of the present application is disposed on one side of the leading pole of the battery 30, and includes a bus bar body, the bus bar body includes at least one bus bar unit, and the bus bar unit includes a first bus bar 10 and a second bus bar 20 with opposite polarities, where:

the first bus bar 10 is provided with a first connection part 11, the first connection part 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 bus bar 20 is provided with a second connecting portion 21, the second connecting portion 21 is configured to abut against an end surface of a pole as the second electrode terminal 32, and the end surface of the pole and the end surface of the battery case are located on the same side of the battery 30.

When the bus bar provided in the embodiment of the present application is applied, the bus bar body may be disposed on the side of the leading pole of the battery 30, and the first connection portion 11 of the first bus bar 10 may be used to connect the first electrode terminal 31 of the battery 30, and the second connection portion 21 of the second bus bar 20 may be used to connect the second electrode terminal 32 of the battery 30. The first bus bar 10 has the same polarity as the first electrode terminal 31, and the second bus bar 20 has the same polarity as the second electrode terminal 32. Illustratively, the first bus bar 10 is a negative polarity bus bar, and the second bus bar 20 is a positive polarity bus bar.

The protruding structure formed on the first connection portion 11 and protruding in the direction of the battery 30 abuts against the end surface of the battery case where the first electrode terminal 31 is drawn out, and the second connection portion 21 abuts against the end surface of the pole where the second electrode terminal 32 is drawn out.

It should be noted that, in the bus bar provided in the embodiment of the present application, the protruding structure can compensate for a height difference existing between the end surface of the battery housing and the terminal in the second direction, so as to achieve effective connection between the bus bar and the battery 30. Meanwhile, the first bus bar 10 and the second bus bar 20 are disposed on the same layer, so that the occupied space of the bus bars can be reduced along the arrangement direction of the batteries 30 and the bus bar body, and the space utilization rate in the battery pack can be improved.

In one embodiment, with continued reference to the structure shown in fig. 3, each first bus bar 10 corresponds to one battery unit, and each first bus bar 10 is provided with a first connecting portion 11 at a position corresponding to each battery 30 in the battery unit. Illustratively, the first bus bar 10 is provided with a first connecting portion 11 at a position corresponding to an end face of the case of the battery 30. Similarly, each of the second bus bars 20 corresponds to the same battery unit, and each of the second bus bars 20 is provided with a second connecting portion 21 at a position corresponding to each of the batteries 30 in the battery unit. Illustratively, the second bus bar 20 is provided with a second connecting portion 21 at a position corresponding to the pole of the battery 30.

In one embodiment, the raised structure may be stamped and formed from a plate body forming the first bus bar 10. Specifically, referring to the structure shown in fig. 4, the side of the end surface of the protruding structure facing the battery case is a protruding structure, and the side of the end surface of the protruding structure facing away from the battery case is a recessed 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 the first bus bar 10 is connected to the end surface of the battery case, a penetration welding method may be used in which a welding gun enters from the side of the concave structure of the convex structure, passes through the convex structure, and welds the convex structure to the end surface of the battery case. It is understood that this connection manner may enhance the stability of the connection of the first bus bar 10 with the first electrode terminal 31.

Referring to the structure shown in fig. 4, it should be noted that the protruding dimension h of the protruding structure needs to be adjusted according to the height of the terminal, so that the terminal is just in contact with the second connecting portion 21 while the protruding structure is in contact with the battery case. Illustratively, the protruding height of the protruding structure is more than 0 and less than or equal to 6mm along the second direction, so as to adapt to the height difference between the pole and the battery shell. Illustratively, the h value can be set to 1mm, 2mm, 3mm, 4mm, 5mm, 6 mm.

In one embodiment, the perpendicular projection of the projection structure on the end face of the housing extends in the circumferential direction of the housing.

With continued reference to the structure shown in fig. 3, when the battery 30 is a cylindrical battery. The battery shell can be cylindrical, the projection of the protruding structure on the end face of the battery shell is arc-shaped, and the arc shape is matched with the shape of the battery shell. Illustratively, the arc is disposed along a rounded edge of the end face of the housing. Of course, in order to ensure that the protrusion structure is effectively connected with the end face of the battery case, a certain gap may be provided between the arc-shaped outer edge and the outer edge of the end face of the battery case.

In one embodiment, with continued reference to the structure shown in fig. 4, in each bus unit, the first bus bar 10 includes two oppositely disposed extending sections 40, and the extending direction of each extending section 40 is perpendicular to the arrangement direction of the two extending sections 40, specifically, each extending section 40 corresponds to a row of batteries 30 in one battery unit.

With continued reference to the structure shown in fig. 1 and fig. 2, taking the battery 30 as a cylindrical battery as an example, the second bus bar 20 is disposed between the two extending segments 40 along the arrangement direction of the two extending segments 40. Of course, the battery 30 may also be a square battery, which is not described in detail herein.

It should be noted that, the second bus bar 20 is disposed between the two extending sections 40, so that the first bus bar 10 and the second bus bar 20 are disposed on the same layer, and the stacking arrangement between the first bus bar 10 and the second bus bar 20 along the second direction is avoided, so that the occupied space along the bus bar body in the second direction can be reduced, and the space utilization rate in the battery 30 is improved.

In one embodiment, each extension segment 40 is provided with an avoidance opening on the side facing the other extension segment 40, and the avoidance opening is used for avoiding the pole in the battery 30 corresponding to the avoidance opening. For example, after the busbar is assembled with the battery 30, the avoiding opening and the side edge of the pole have a certain gap, and the gap can avoid the first busbar piece 10 from being mistakenly collided with the pole, so that the internal short circuit of the battery 30 can be avoided, and the stability of the battery 30 can be improved. Of course, when the battery 30 is a square battery, the extending section 40 may be far from the pole, so that the extending section 40 may not be provided with an avoidance opening, and may be specifically set according to requirements, which is not described herein again.

In one embodiment, with continued reference to the structure shown in fig. 4, along the extension direction of each extension segment 40, the side of the extension segment 40 facing away from the other extension segment 40 is provided with a contoured indentation 41, and the contoured indentation 41 corresponds to the shape of the gap between adjacent cells 30.

It should be noted that, since there may be a gap between the cases of the adjacent batteries 30 in the battery unit, the profiling notch 41 may be formed at a position corresponding to the portion of each extending section 40, so as to reduce the weight of the bus bar, increase the heat dissipation area inside the battery 30, and make the first connecting portion 11 adaptable to a certain height difference. Specifically, the extending section 40 is provided with a profiling notch 41, so that the extending section 40 can have a certain elastic deformation, and thus, a slight deformation can exist in the height direction, so as to facilitate the welding operation.

Illustratively, each single battery 30 in the battery unit is cylindrical, and a gap (filled with dots) as shown in fig. 3 exists between the housings of each row of adjacent batteries 30. The contoured indentation 41 is the same or similar to the projection of the gap in the second direction.

It is noted that in a specific embodiment, it may be provided that: along the second direction, the vertical projection of the profiling notch 41 may be larger than the vertical projection of the gap to ensure that the corresponding area between the first bus bar 10 and the end face of the battery housing is sufficient and can be effectively connected. In another specific embodiment, it may be provided that: in the second direction, the perpendicular projection of the contoured indentation 41 may be smaller than the perpendicular projection of the gap to reduce the weight of the buss bar, thereby reducing the overall weight of the battery 30.

Of course, in another specific embodiment, there may be further provided: along the second direction, the vertical projection of the profiling notch 41 is the same as the vertical projection of the gap, so that the weight of the busbar is reduced, the internal heat dissipation area of the battery 30 is increased, and the first busbar piece 10 is ensured to be enough in corresponding area with the end surface of the battery shell and can be effectively connected.

With continued reference to the structure shown in fig. 2 and 3, the shape of the second connection portion 21 of the second bus bar 20 may be similar to the shape of the second electrode terminal 32, so as to ensure the connection area between the second connection portion 21 and the second electrode terminal 32, thereby ensuring the overcurrent area and improving the overcurrent capacity.

Illustratively, the second electrode terminal 32 is a pole, and the second connection portion 21 is a quasi-circular shape similar to a circular end surface of the pole. It should be understood that the second connecting portion 21 has a substantially circular structure, and since the second bus bar 20 needs to connect a plurality of battery 30 poles in the same battery unit, a plurality of second connecting portions 21 can be connected by a single main structure, and in this case, the second connecting portion 21 has a slightly deformed shape at the connection position, forming a quasi-circular shape.

It should be noted that the second connection part 21 and the second electrode terminal 32 may be connected by laser welding. In a specific embodiment, a positioning hole may be disposed on the second connecting portion 21, so that the laser device can be accurately positioned, and the welding precision can be improved.

With continuing reference to the structure shown in fig. 1 to fig. 3, taking a battery unit as an example, the batteries 30 in each battery unit are connected in parallel through the bus bars provided in the embodiments of the present application.

Specifically, taking the first battery cell as an example in the first direction, the same second bus bar 20 connects the second electrode terminals 32 of the 9 batteries 30 in the same battery cell, the same first bus bar 10 connects the first electrode terminals 31 of the 9 batteries 30 in the battery cell, the first bus bar 10 and the second bus bar 20 are provided in an insulating manner, and the 9 batteries 30 in the battery cell are arranged in parallel.

The adjacent battery units are connected in series through the bus bars, and specifically, the first bus bar member 10 of one bus bar unit and the second bus bar member 20 of the other bus bar unit in the adjacent bus bar units are of an integral structure, or the second bus bar member 20 of one bus bar unit and the first bus bar member 10 of the other bus bar unit in the adjacent bus bar units are of an integral structure. Illustratively, in the first direction, taking two adjacent battery units as an example, the second bus bar 20 connected with the previous battery unit is connected with the first bus bar 10 connected with the next battery unit, that is, the second polarity structure of the previous battery unit is connected with the first polarity structure of the next battery unit, and the adjacent battery units are connected in series.

It should be noted that, by connecting a plurality of cells 30 in series and in parallel, the battery pack can reach the voltage and capacity required by the product to meet the requirement.

It should be understood that the connection structure between the second bus bar 20 and the first bus bar 10 corresponding to the adjacent battery cells may be formed through an integral molding process to simplify the installation and preparation processes and improve efficiency. Meanwhile, it is noted that the integrally formed arrangement can increase the connection area between the second bus bar 20 and the first bus bar 10 corresponding to the adjacent battery units, so as to increase the flow area and ensure the flow capacity.

Of course, other structures may be used to connect the second bus bar 20 and the first bus bar 10 corresponding to the adjacent battery units, and for example, a connection plate or a connection line may be used to connect the second bus bar and the first bus bar, which will not be described herein again.

With reference to the structure shown in fig. 4, the bus bar provided in the embodiment of the present application further includes a bending portion 50, and the bending portion 50 is used for fixing the bus bar body. For example, the bent portion 50 may be connected to the first bus bar 10 or the second bus bar 20. Specifically, when one end of the first bus bar 10 is located at the most peripheral position, the bus bar body may be fixed to a case in which the battery 30 is placed by the bent portion 50.

It should be understood that the bent portion 50 may be included with the first bus member 10 or the second bus member 20 to better adapt to the space configuration of the box body, or to match the arrangement shape of the batteries 30 in the battery unit.

In an embodiment, with continuing reference to the structure shown in fig. 1 and fig. 3, the bus bar provided in the embodiment of the present application further includes a fixing member 60, and the fixing member 60 is used for carrying the first bus bar 10 and the second bus bar 20 of the bus bar body.

It should be noted that the fixing member 60 can be used to facilitate the mounting operation of the first bus bar 10 and the second bus bar 20. Specifically, in the installation process, it is sufficient to integrally move the fixing member 60, the first bus bar 10 and the second bus bar 20, which can simplify the installation process and improve the assembly efficiency. Meanwhile, in the battery pack provided in the embodiment of the present application, the fixing member 60 may pre-fix the positions of the first bus bar 10 and the second bus bar 20, so as to improve the connection alignment accuracy between the first bus bar 10 and the second bus bar 20 and the battery 30.

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 at one side of the fixing member 60, a first hollow 63 is provided at a portion of the fixing member 60 located in the first placing space 61, and a second hollow 64 is provided at a portion of the fixing member 60 located in the second placing space 62.

Specifically, the first bus bar 10 may be placed in the first placing space 61, and the second bus bar 20 may be placed in the second placing space 62. Meanwhile, when the bus bar unit is used for realizing the parallel connection of the plurality of batteries 30 in the battery unit, the first bus bar 10 is used for connecting the first electrode terminals 31 of the plurality of batteries 30, and the second bus bar 20 is used for connecting the second electrode terminals 32 of the plurality of batteries 30; the first placing space 61 and the second placing space 62 may be provided with insulation therebetween to avoid a short circuit between the first bus bar 10 and the second bus bar 20 in the bus unit.

It should be understood that the first placing space 61 is the same or similar in shape to the first bus bar 10. For example, the first accommodating space 61 may be configured to fit the shape of the first bus bar 10. Alternatively, the first placing space 61 may be provided to be larger in volume than the first bus bar 10. Of course, a similar arrangement can be made between the second placing space 62 and the second bus bar 20, and will not be described in detail here.

It should be noted that, when the first hollow-out portion 63 is provided, the shape of the first hollow-out portion 63 may be larger than the shape of the protruding structure, so that the protruding structure extends into the first hollow-out portion 63 from the side away from the battery 30 to be connected with the end surface of the battery case. As shown in fig. 3, 5 and 4, for example, in a specific embodiment, the shape of the first hollow 63 of the fixing member 60 is adapted to the shape of the convex structure. It will be appreciated that this structural arrangement may enhance the strength of the fastener 60 while ensuring that the raised structure is effectively connected to the battery 30.

With continued reference to the structure shown in fig. 3 to 5, the second hollow portion 64 may be similar to the post of the battery 30. Illustratively, the second hollow-out portion 64 is a circular structure concentric with the pole, and the area of the second hollow-out portion 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 to improve the stability of the connection between the second bus bar 20 and the battery 30.

Of course, the second hollow-out portion 64 may be configured in other structures and shapes, which are not described herein again.

In one embodiment, with continued reference to the structure shown in fig. 3, the fixing member 60 is disposed between the battery 30 and the busbar body, and the first placing space 61 and the second placing space 62 are disposed on a side of the fixing member 60 away from the battery 30.

It is to be understood that, in this particular embodiment, the first bus bar 10 and the second bus bar 20 are fixed using the fixing member 60, and the first bus bar 10 and the second bus bar 20 are positionally corrected with respect to the battery 30 by the fixing member 60.

Meanwhile, the depths of the first placing space 61 and the second placing space 62 in the second direction may be set so that the first bus bar 10 and the second bus bar 20 are coplanar with each other on the side surface facing away from the battery 30. It is noted that the "coplanar" includes completely coplanar or nearly coplanar, and there may be a possibility that there is a slight difference in height between the first bus bar 10 and the second bus bar 20 at the side due to the influence of the manufacturing process.

Of course, in another specific embodiment, the first placing space 61 and the second placing space 62 may be further disposed on the side of the fixing member 60 facing the battery 30, so as to perform quick installation of the busbar body by using the fixing member 60, and detailed description thereof is omitted.

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 in the embodiment of the present application is used to fix the first bus bar 10 and the second bus bar 20, the connection operation between the first bus bar 10 and the battery 30 can be realized through the first hollow portion 63 corresponding to the first connection portion 11. Meanwhile, the connection operation between the second bus bar 20 and the battery 30 may be achieved through the second hollowed portion 64 corresponding to the second connection portion 21.

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

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

In particular, when the structure of the fixing member 60 is provided, in one embodiment, the fixing member 60 may include a body and a partition rib provided on one side of the body, and the partition rib partitions the body into a first placing space 61 and a second placing space 62, as exemplarily shown in fig. 5.

It should be noted that, the first placing space 61 and the second placing space 62 are separated from one side of the body by the separating rib, so that the fixing member 60 has a simple overall structure, the manufacturing process can be simplified, and the manufacturing efficiency can be improved.

It should be understood that, when the partition rib is provided, a part of the partition rib may be provided in common to the first placing space 61 and the second placing space 62. Of course, the first placing space 61 and the second placing space 62 may be separated by using separate separating ribs, which will not be described herein.

It should be noted that, in order to prevent the bus bar body from coming off the fixing member 60, various configurations may be selected to assist the fixing of the bus bar body and the fixing member 60.

In one embodiment, the fixing member 60 and the bus bar body may be fixed by a snap structure.

For example, a first snap fastener 65 may be provided near the first placing space 61 to fix the first bus bar 10 in the first placing space 61.

It should be noted that, this structural arrangement can prevent the first bus bar 10 from coming out of the first accommodating space 61, and enhance the stability of the first bus bar 10 in the first accommodating space 61.

In a specific embodiment, the partition ribs forming the first placing space 61 are provided with first snap fasteners 65.

In another specific embodiment, a first snap fastener 65 is disposed in the first placing space 61.

In another specific embodiment, the partition ribs forming the first placing space 61, and the first snap fastener 65 are disposed in the first placing space 61.

It should be understood that, when the first placing space 61 and the separating ribs are both provided with the first snap fastener 65, the stability of the first collecting bar 10 in the first placing space 61 can be improved.

It should be noted that the number and the arrangement position of the first snap fasteners 65 can be set as required. For example, a plurality of first clamping buckles 65 can be arranged along the extension direction of the separation rib or the first placing space 61 to fix the first bus bar 10 at a plurality of positions, so that the stability of the first bus bar 10 is improved.

When the structure of the first snap fastener 65 is specifically provided, as shown in fig. 5, the first snap fastener 65 may be formed by a first snap connection plate 67, the first snap connection plate 67 includes a connection portion and a snap connection portion, and the snap connection portion is used for snapping the first bus bar 10; the joint portion is connected to connecting portion one end, and the breach bottom of separating the muscle is connected to the other end, and has the clearance between the lateral wall of connecting portion and breach.

It should be noted that, when the first snap fastener 65 is formed by the first snap plate 67, since the first snap plate 67 has a gap with the sidewall of the gap, the deformation amount of the first snap fastener 65 relative to the body can be increased, so as to facilitate the first bus bar 10 to move into or out of the first accommodating space 61.

For example, a second snap-in fastener 66 may be disposed near the second placing space 62 to fix the second bus bar 20 in the second placing space 62.

It should be noted that, with this structure, the second bus bar 20 can be prevented from coming out of the second accommodating space 62, and the stability of the second bus bar 20 after being accommodated in the second accommodating space 62 can be enhanced.

In a specific embodiment, the partition ribs forming the second placing space 62 are provided with second snap fasteners 66.

In another specific embodiment, a second buckle 66 is disposed in the second space 62.

In another specific embodiment, a partition rib forming the second placing space 62, and a second snap-in fastener 66 are disposed in the second placing space 62.

It should be understood that when the second placing space 62 and the separating ribs are both provided with the second snap fastener 66, the stability of the second collecting piece 20 in the first placing space 61 can be improved.

Similarly, the number and the arrangement positions of the second snap fasteners 66 can be set as required, and are not described in detail herein.

In another embodiment, the bus bar body is adhesively connected to the fixture 60. It should be appreciated that the adhesive connection is simple and easy to operate, and can reduce the difficulty of assembly operation.

In another embodiment, the bus bar body is riveted to the fixing member 60. Illustratively, a hot rivet connection may be used. It will be appreciated that the riveted connection may enhance the stability of the busbar body after assembly with the fixture 60.

Of course, the fixing member 60 and the busbar body can be fixed by any combination of clamping, bonding or riveting, so as to improve the stability of the two after assembly, which is not described herein again.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the 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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