CN217009479U - Busbar and battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries and provides a bus bar and a battery pack. The bus bar includes: the battery unit comprises a bus bar body, wherein a notch is formed in the edge of the bus bar body, and the notch is used for surrounding at least part of a cylindrical battery along the circumferential direction of the cylindrical battery in the battery unit. When the bus bar provided by the application is applied, the bus bar is arranged on one side of the cylindrical battery; when the battery pack is in a use state, at least part of heat emitted from the cylindrical batteries can be dissipated through the heat dissipation channel formed by the notches circumferentially surrounding the cylindrical batteries. It should be noted that, the bus bar that this application provided can increase heat radiating area, promote the radiating effect through the edge at the bus bar body sets up the breach, simultaneously, sets up the structural design of breach at the bus bar body, can alleviate the whole weight of bus bar to do benefit to the weight that alleviates the group battery.

Description

Busbar and battery pack

Technical Field

The utility model 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 a bus bar to derive a signal such as a voltage in the battery pack.

However, after the conventional bus bar is connected to the battery unit, when the battery unit dissipates heat, the bus bar may shield a part of the heat dissipation channel, which affects the heat dissipation effect of the battery unit.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bus bar and a battery pack, which are used for increasing the heat dissipation area and reducing the weight of the bus bar.

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

according to a first aspect of the present invention, there is provided a bus bar including:

the bus bar comprises a bus bar body, wherein a notch is formed in the edge of the bus bar body, and the notch is used for surrounding at least part of a cylindrical battery along the circumferential direction of the cylindrical battery in the battery unit.

When the bus bar provided by the application is applied, the bus bar is arranged on one side of the cylindrical battery; when the battery pack is in a use state, at least part of heat emitted from the cylindrical batteries can be dissipated through the heat dissipation channel formed by the notches circumferentially surrounding the cylindrical batteries. It should be noted that, the bus bar that this application provided can increase heat radiating area, promote the radiating effect through the edge at the bus bar body sets up the breach, simultaneously, sets up the structural design of breach at the bus bar body, can alleviate the whole weight of bus bar to do benefit to the weight that alleviates the group battery.

According to a second aspect of the present application, there is provided a battery pack including the bus bar and the battery cell provided in any of the above-described aspects, the bus bar body in the bus bar being connected to the battery cell; wherein,

the battery unit includes a cylindrical battery;

along the circumferential direction of the cylindrical battery, a notch arranged on the edge of the busbar body surrounds at least part of the cylindrical battery.

The application provides a busbar sets up the breach at the edge of busbar body among the group battery. When the bus bar provided by the application is applied, the bus bar is arranged on one side of the battery unit in the battery pack; when the battery pack is in a use state, at least part of heat emitted from the cylindrical batteries can be dissipated through the heat dissipation channel formed by the notches circumferentially surrounding the cylindrical batteries. It should be noted that, the bus bar that this application provided can increase heat radiating area, promote the radiating effect through the edge at the bus bar body sets up the breach, simultaneously, sets up the structural design of breach at the bus bar body, can alleviate the whole weight of bus bar to do benefit to the weight that alleviates the group battery.

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 bus bar according to an embodiment of the present disclosure;

fig. 2 is an exploded view of an assembled structure of a bus bar and a battery cell according to an embodiment of the present disclosure;

FIG. 3 is a schematic assembled view of the structure of FIG. 2;

fig. 4 is a schematic structural diagram of a first notch provided in the present application;

fig. 5 is another schematic structural diagram of a first notch provided in the embodiment of the present application;

fig. 6 is a schematic structural diagram of a second notch provided in the present application;

fig. 7 is another schematic structural diagram of a second notch provided in the embodiment of the present application.

The reference numerals are explained below:

100. a busbar body; 110. a first bus portion; 111. a first notch; 1111. a first edge; 1112. A second edge; 1113. a first intermediate edge; 120. a second bus portion; 121. a second notch; 1211. A third edge; 1212. a fourth edge; 1213. a second intermediate edge; 130. a bending section; 140. an insulating structure; 200. a battery cell; 210. a cylindrical battery; 211. a housing; 212. and (4) a pole.

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 unless otherwise stated or indicated, and for example, "connected" may be 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 the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

In a first aspect, embodiments of the present application provide a bus bar. Fig. 1 is a schematic structural diagram of a bus bar according to an embodiment of the present application. As shown in fig. 1, a bus bar provided in an embodiment of the present application includes: the bus bar body 100 is provided with a notch a at the edge, and the notch a is used for surrounding at least part of the cylindrical battery 210 along the circumferential direction of the cylindrical battery 210 in the battery unit 200.

Fig. 2 is an exploded view of an assembled structure of a bus bar and a battery unit 200 according to an embodiment of the present disclosure. Fig. 3 is a schematic structure diagram of the structure of fig. 2 after assembly. In applying the bus bar provided in the present application, as shown in fig. 2 and 3, the bus bar is generally disposed on the side of the battery cell 200 (shown by a dashed line frame in fig. 2 and 3); when the battery pack is in use, at least a portion of heat emitted from the cylindrical batteries 210 can be dissipated along the heat dissipation channel formed by the notches a. It should be noted that, the bus bar provided by the embodiment of the present application can increase the heat dissipation area and improve the heat dissipation effect by providing the notch a at the edge of the bus bar body 100, and meanwhile, the structural design of providing the notch a at the bus bar body 100 can reduce the overall weight of the bus bar, thereby facilitating the reduction of the weight of the battery pack.

It should be noted that, with continued reference to the structure shown in fig. 2 and 3, for example, a plurality of battery cells 200 in a battery pack are arranged in a first direction, and a bus bar is disposed on one side of the battery cells 200. Specifically, each battery cell 200 includes one or more cylindrical batteries 210, and each cylindrical battery 210 has two electrode terminals having opposite polarities. Illustratively, each cylindrical battery 210 comprises a cylindrical shell 211 and a pole 212 protruding from the shell 211, wherein the pole 212 of the cylindrical battery 210 serves as a first electrode terminal, and the end face of the pole 212 protruding from the shell 211 and far away from the cylindrical battery 210 serves as a leading-out face of the first electrode terminal; the case 211 of the cylindrical battery 210 serves as a second electrode terminal having an opposite polarity to the first electrode terminal, and an end surface of the case 211 from which the electrode post 212 protrudes out of the case 211 serves as a lead-out surface of the second electrode terminal. It is noted that the poles 212 of each cylindrical cell 210 are arranged along a second direction, and the second direction is perpendicular to the first direction.

In one embodiment, the bus bar body 100 includes a first bus part 110, the first bus part 110 being used to connect one battery cell 200; the notch a includes a first notch 111 provided in the first bus bar 110, and the first notch 111 surrounds at least a portion of the case 211 of the cylindrical battery 210.

It is noted that there may be gaps between adjacent cylindrical batteries 210 within the battery unit 200. Illustratively, each single cylindrical battery 210 in the battery unit 200 has a cylindrical shape, and gaps (filled with dots) may exist between adjacent cylindrical batteries 210 in each row as shown in fig. 2. As shown in fig. 2 and 3, the first notch 111 corresponds to a gap between two adjacent cylindrical batteries 210 in the battery unit 200. Specifically, the first notch 111 partially circumferentially surrounds one cylindrical cell 210 of the two adjacent cylindrical cells 210, and partially circumferentially surrounds the other cylindrical cell 210 of the two adjacent cylindrical cells 210.

The first notch 111 is provided at the edge of the first bus bar 110, so that the heat dissipation area can be increased. Specifically, when heat is generated in the battery unit 200, the heat can move toward the bus bar body 100 through the gap between the adjacent cylindrical batteries 210 until the heat is discharged from the first notch 111 of the first bus bar 110.

Meanwhile, the structural arrangement in which the first notch 111 is provided at the edge of the first bus bar part 110 may reduce the weight of the bus bar body 100, thereby facilitating the reduction of the weight of the battery pack.

It should be understood that the number of the first notches 111 on the first bus bar part 110 may be one or more, and may be specifically set according to requirements. It should be noted that, when the number of the first notches 111 is plural, the heat dissipation area can be increased better, and the weight of the bus bar can be reduced better.

When the shape and size of the first notch 111 are set, there are many possibilities for the structure of the first notch 111. Specifically, if the side of the cylindrical battery 210 without the pole 212 is taken as the bottom, the vertical projection of the first notch 111 on the bottom along the second direction may be larger than the vertical projection of the gap, so as to reduce the weight of the bus bar body 100 and increase the heat dissipation area. Alternatively, it is possible to provide: in the second direction, the vertical projection of the first notch 111 may be smaller than the vertical projection of the gap, so that the first bus bar 110 and the end surface of the housing 211 of the cylindrical battery 210 may be effectively connected. Of course, it is also possible to provide: along the second direction, the vertical projection of the first notch 111 is the same as that of the gap, so that the weight of the bus bar is reduced, the internal heat dissipation area of the cylindrical battery 210 is increased, and the first bus part 110 can be effectively connected with the end face of the shell 211 of the cylindrical battery 210.

When the shape of the first notch 111 is specifically set, the shape of the edge line of the first bus bar 110 can be adjusted to change the style of the first notch 111, specifically as follows:

in one embodiment, with continued reference to the structure shown in fig. 3, the first bus bar 110 includes a first edge 1111 and a second edge 1112, and the first edge 1111 is connected to one end of the second edge 1112 to form a first gap 111. Of course, the shape of each first notch 111 can be deformed according to the requirement, and can be set to be the same structure, or can be set to be different structures, which is not described herein again.

Illustratively, the first notch 111 is shaped as shown in fig. 4, the first edge 1111 and a portion of the first notch 111 are adapted to surround the housing 211 of one of the adjacent cylindrical cells 210, and the second edge 1112 and a portion of the first notch 111 are adapted to surround the housing 211 of another one of the adjacent cylindrical cells 210.

It should be noted that when the first notch 111 is provided while surrounding the cases 211 of the adjacent two cylindrical batteries 210, the manufacturing process can be simplified. Specifically, the first notch 111 surrounding the housing 211 of two adjacent cylindrical batteries 210 can be formed by directly punching the first bus bar 110 once. Meanwhile, it is noted that the area of the first notch 111 can be increased by the structural arrangement, so as to improve the heat dissipation effect.

In one embodiment, the first edge 1111 is configured to coincide with an orthographic projection of the housing 211 of one cylindrical battery 210 of the adjacent cylindrical batteries 210 within the battery unit 200 at the first bus bar 110. In other words, the first edge 1111 is disposed along the circumferential edge of the case 211 of one cylindrical battery 210. It is to be noted that, when the first edge 1111 is provided along the circumferential edge of the case 211 of the cylindrical battery 210, the first notch 111 may be made larger on the side, so that the heat dissipation area may be increased, and at the same time, the weight of the first bus bar part 110 may be reduced.

In another embodiment, the second edge 1112 is configured to coincide with a perpendicular projection of the housing of another one of the adjacent cylindrical cells 210 within the battery unit 200 onto the first bus bar 110. In other words, the second edge 1112 is disposed along a circumferential edge of the housing 211 of one cylindrical cell 210. It is noted that when the second edge 1112 is disposed along the circumferential edge of the housing 211 of the cylindrical battery 210, the first notch 111 may be made larger on the side, so that the heat dissipation area may be increased, and at the same time, the weight of the first bus bar portion 110 may be reduced.

In another embodiment, the first edge 1111 is configured to coincide with an orthographic projection of the housing 211 of one of the adjacent cylindrical batteries 210 in the battery unit 200 at the first bus bar 110; the second edge 1112 is configured to coincide with a perpendicular projection of the housing of another cylindrical cell 210 of the adjacent cylindrical cells 210 in the battery unit 200 on the first bus bar 110.

It should be noted that, in this embodiment, the first edge 1111 and the second edge 1112 are respectively disposed along the circumferential edges of the housings 211 of the two cylindrical batteries 210, so that the area of the first notch 111 can be maximized on the basis of ensuring the connection area of the first bus bar part 110 and the end faces of the housings 211 of the cylindrical batteries 210, thereby increasing the heat dissipation area, and reducing the weight of the first bus bar part 110.

In one embodiment, when the housing 211 of the cylindrical battery 210 has a cylindrical structure, the first edge 1111 and the second edge 1112 are both arc-shaped; and each of the first edge 1111 and the second edge 1112 protrudes toward the first notch 111. At this time, the shapes of the first edge 1111 and the second edge 1112 are fitted to the cylindrical structure of the housing 211.

In one embodiment, as shown in fig. 5, the first bus bar 110 further includes an arc-shaped first intermediate edge 1113, and the first intermediate edge 1113 is connected to the first edge 1111 at one end and the second edge 1112 at the other end. It is understood that the major arc refers to an arc of a circle subtending a central angle greater than 180. Of course, the first middle edge 1113 may also be an arc similar to a major arc, i.e., an arc line having a deformation relative to a standard major arc, which is not described herein again.

It should be noted that the curved first middle edge 1113 can increase the smoothness of the connection between the first edge 1111 and the second edge 1112 to prevent the first bus bar 110 from tearing from the connection between the first edge 1111 and the second edge 1112.

In one embodiment, continuing with the structure shown in fig. 5, the first middle edge 1113 is a major arc, and the major arc protrudes to a side away from the first notch 111.

It should be noted that, when the first middle edge 1113 is set as the major arc, the tensile strength of the first notch 111 can be improved, so as to better prevent the first bus bar 110 from being torn from the connection between the first edge 1111 and the second edge 1112.

In one embodiment, with continued reference to the structure shown in fig. 2 and 3, the busbar body 100 includes a second busbar portion 120; the notch a includes a second notch 121 provided in the second bus bar 120, and the second notch 121 surrounds at least a portion of the pole 212 of the cylindrical battery 210 in the battery unit 200.

The first notch 111 is disposed in the second bus bar 120, so that the heat dissipation area can be increased, and after the cylindrical battery 210 generates heat, the heat can move from the end surface of the housing 211 of the cylindrical battery 210 to the direction close to the bus bar body 100 until the heat is led out from the second notch 121 of the second bus bar 120. Meanwhile, the bus bar weight can be reduced by the structural arrangement of providing the second notch 121 in the second bus bar part 120.

In one embodiment, with continued reference to the structure shown in fig. 2 and 3, the second bus bar portion 120 includes a body region and a connection region for connecting the post 212, the connection region extending from the body region and corresponding in shape to the post 212;

the second notch 121 is at least provided at one junction of the body region and the connection region.

It should be noted that, with continuing reference to the structure shown in fig. 2 and fig. 3, the shape of the connection region of the second bus bar 120 may be similar to the shape of the post 212, so as to ensure the connection area between the connection region and the post 212, thereby ensuring the flow area and improving the flow capacity. Illustratively, the connection region is quasi-circular similar to the circular end face of the post 212. It should be understood that the connection regions are generally circular in structure, and since the second bus bar part 120 needs to be connected with the poles 212 of the plurality of cylindrical batteries 210 in the same battery unit 200, the plurality of connection regions are connected by the same body region, and the connection regions are slightly deformed in shape and form a quasi-circular shape at the connection positions.

It should be noted that the connection region and the post 212 may be connected by laser welding. In a specific embodiment, a positioning hole can be formed in the connecting area, so that the laser device can be accurately positioned, and the welding precision is improved.

It should be noted that, with continued reference to the structures shown in fig. 2 and 3, each body region and connecting region has two connecting points. When the second notch 121 is disposed, the second notch 121 may be disposed at a connection point between the connection area and the body area, or the second notch 121 may be disposed at both connection points.

It is worth noting that when the second notch 121 is disposed at the connection position of the connection region and the body region, the connection region may slightly deform and generate a certain height difference in the second direction relative to the body region, so as to meet the welding requirement of the pole 212.

In an embodiment, taking a second notch 121 as an example, as the structure shown in fig. 6, the second bus bar 120 includes a third edge 1211 and a fourth edge 1212, the third edge 1211 is located in the connection region, and the fourth edge 1212 is located in the body region;

the third edge 1211 is connected to an end of the fourth edge 1212 to form a second notch 121.

It should be noted that, in this embodiment, the third edge 1211 and the fourth edge 1212 surround to form the second notch 121, and the shape of the second notch 121 may be implemented by adjusting the shapes of the third edge 1211 and the fourth edge 1212.

In one embodiment, the fourth edge 1212 has an arc shape, and the fourth edge 1212 protrudes away from the second notch 121.

When the fourth edge 1212 is provided, the center of the fourth edge 1212 and the axis of the post 212 may be collinear, so as to increase the area of the second notch 121, increase the heat dissipation area, and reduce the weight of the first bus bar 110, while ensuring the connection area between the connection area and the post 212.

In one embodiment, as shown in the structure of fig. 7, the second bus part 120 further includes a second middle edge 1213 having an arc shape, the second middle edge 1213 having one end connected to the third edge 1211 and the other end connected to the fourth edge 1212.

It should be noted that the arc-shaped second middle edge 1213 can increase the smoothness of the connection between the third edge 1211 and the fourth edge 1212, so as to prevent the second bus bar 120 from being torn from the connection between the third edge 1211 and the fourth edge 1212.

In one embodiment, with continued reference to the structure shown in fig. 7, the second intermediate edge 1213 is a major arc that projects to the side facing away from the second notch 121.

It should be noted that, when the second middle edge 1213 is set as a major arc, the tensile strength of the second notch 121 can be improved, so as to better prevent the second bus bar 120 from being torn from the connection between the third edge 1211 and the fourth edge 1212.

In one embodiment, the bus bar provided in the embodiment of the present application is further provided with a bending portion 130, and the bending portion 130 is used for fixing the bus bar body 100. For example, the bending portion 130 may be connected to the first bus portion 110 or the second bus portion 120. Specifically, when one end of the first bus bar 110 is located at the most peripheral position, the bus bar body 100 may be fixed on a case in which the cylindrical batteries 210 are placed by the bent portion 130.

It should be understood that the bent portion 130 may be included in the first bus portion 110 or the second bus portion 120 to better adapt to the space of the case, or to match the arrangement shape of the cylindrical batteries 210 in the battery unit 200.

Illustratively, the bent portion 130 includes a connection area for connecting with the case and a bent area for changing direction. The bent regions are obliquely arranged in the extending direction b of the end surfaces of the battery cell 200 to accommodate the amount of deformation in a plurality of directions. It is to be understood that this direction b will be described in detail in the following description.

In a second aspect, embodiments of the present application provide a battery pack. With continued reference to the structure shown in fig. 2 and 3, the battery pack includes the bus bars and the battery cells 200 provided in any of the above-described embodiments, the bus bar bodies 100 in the bus bars are connected to the battery cells 200; wherein,

the battery unit 200 includes a cylindrical battery 210;

in the circumferential direction of the cylindrical battery 210, the notch provided at the edge of the busbar body 100 surrounds at least part of the cylindrical battery 210.

It should be noted that, in the battery pack provided in the embodiment of the present application, the bus bar is provided with a notch at an edge of the bus bar body 100. When the battery pack provided by the embodiment of the application is applied, the bus bar is arranged on one side of the battery unit 200 in the battery pack; when the battery pack is in use, at least a part of the heat emitted from the cylindrical batteries 210 can be dissipated through the heat dissipation channel formed by the notches circumferentially surrounding the cylindrical batteries 210.

It is worth noting that the battery pack provided by the embodiment of the application can increase the heat dissipation area and improve the heat dissipation effect by arranging the notch at the edge of the bus bar body 100, and meanwhile, the structural design of arranging the notch at the bus bar body 100 can reduce the whole weight of the bus bar, thereby being beneficial to reducing the weight of the battery pack.

With continued reference to the structure shown in fig. 2, the battery units 200 in the battery pack provided in the embodiment of the present application are illustrated by dashed boxes, and a plurality of battery units 200 are sequentially arranged to form a queue. Illustratively, the plurality of cylindrical cells 210 are arranged in a first direction, and the cylindrical cells 210 between adjacent rows are staggered, with each cylindrical cell 210 arranged in a second direction. Illustratively, one battery cell 200 is formed with 9 cylindrical batteries 210 in fig. 3 (a dotted-line frame inner structure), and two battery cells 200 adjacent in the first direction are arranged in a staggered manner. Of course, the number and arrangement of the cylindrical batteries 210 in each battery unit 200 may be set as required. Of course, it is also possible to include only one cylindrical battery 210 in each battery unit 200, which is not described in detail herein.

In fig. 3, one battery unit 200 is taken as an example, and two cylindrical batteries 210 located at one end of the battery unit 200 are arranged along the direction b along the first direction. It should be noted that the direction b is included with a third direction, and the third direction is perpendicular to the first direction and the second direction. Of course, the direction b may also be collinear with the third direction, 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. 2 and 3, a first bus bar 110 and a second bus bar 120 form a bus group to connect terminals of two polarities in the same cell 200. Illustratively, one bus bar group is used to realize parallel operation among a plurality of cylindrical batteries 210 in the same battery unit 200.

With continued reference to the structure shown in fig. 2 and 3, the busbar body 100 is located on the side of the cylindrical battery 210 where the post 212 is disposed; in the busbar body 100, the first bus portion 110 is connected to an end surface of the housing 211, and the second bus portion 120 is connected to an end surface of the pole 212. It is to be understood that the housing 211 serves as an electrode terminal of one polarity and the pole 212 serves as an electrode terminal of the other polarity.

Illustratively, each cylindrical battery 210 comprises a cylindrical shell 211 and a pole 212 protruding from the shell 211, wherein the pole 212 of the cylindrical battery 210 serves as a first electrode terminal, and the end face of the pole 212 protruding from the shell 211 and far away from the cylindrical battery 210 serves as a leading-out face of the first electrode terminal; the case 211 of the cylindrical battery 210 serves as a second electrode terminal having an opposite polarity to the first electrode terminal, and an end surface of the case 211 from which the electrode post 212 protrudes out of the case 211 serves as a lead-out surface of the second electrode terminal.

With continued reference to the structure shown in fig. 2 and fig. 3, the first bus portion 110 has a through hole, the first electrode terminal (i.e. the pole 212) is disposed in the through hole, and the first bus portion 110 abuts against the leading-out surface of the second electrode terminal; the connection region of the second bus bar 120 is fitted to the shape of the first electrode terminal (i.e., the pole 212), and the second bus bar 120 abuts against the lead-out surface of the second electrode terminal (i.e., the housing 211) through the connection region.

It should be noted that the first bus bar part 110 and the second bus bar part 120 are stacked to accommodate a height difference between the leading-out surface of the first electrode terminal and the leading-out surface of the second electrode terminal, thereby facilitating a subsequent connection operation.

It should be noted that, in the structure of the through hole, the diameter of the through hole is larger than that of the pole 212, so as to insulate the first bus bar 110 from the pole 212 and prevent the first bus bar from contacting the pole 212. It should be understood that the through hole on the first bus bar portion 110 may be a complete through hole structure, or may also be a through hole structure lacking a partial structure as shown in fig. 2 and fig. 3, and may be specifically configured as required, and is not described herein again.

With continued reference to the structure shown in fig. 2 and 3, between adjacent bus bars, the second bus bar portion 120 of one bus bar and the first bus bar portion 110 of another bus bar may adopt an integrated structure to connect the adjacent battery cells 200 in series.

It should be noted that, along the second direction, the second bus bar portion 120 and the first bus bar portion 110 having an integrated structure may have a height difference therebetween, so as to adapt to the height difference between the terminal post 212 and the end surface of the housing 211 of the cylindrical battery 210, thereby facilitating the subsequent connection operation.

Meanwhile, since each of the bus bar groups, the first bus bar portion 110 and the second bus bar portion 120, are stacked in the second direction, the insulating structure 140 may be disposed between the first bus bar portion 110 and the second bus bar portion 120 of each of the bus bar groups to form effective insulation therebetween. Illustratively, the insulating structure 140 may be formed of an insulating coating, an insulating tape, or an insulating film.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within 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 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 present disclosure is limited only by the appended claims.

Claims (13)

1. A bus bar, comprising: the battery pack comprises a bus bar body (100), wherein the edge of the bus bar body (100) is provided with a notch, and the notch is used for surrounding at least part of a cylindrical battery (210) along the circumferential direction of the cylindrical battery (210) in a battery unit (200).

2. The busbar according to claim 1, wherein the busbar body (100) comprises a first busbar portion (110), the first busbar portion (110) being for connecting one battery cell (200); the notch comprises a first notch (111) arranged on the first bus bar part (110), and the first notch (111) surrounds at least part of a shell (211) of the cylindrical battery (210).

3. The bus bar according to claim 2, wherein the first bus bar part (110) comprises a first edge (1111) and a second edge (1112), the first edge (1111) is connected with one end of the second edge (1112) and surrounds to form the first notch (111), and at least a part of the first notch (111) is used for corresponding to a gap between adjacent cylindrical batteries (210).

4. The bus bar of claim 3,

the first edge (1111) is used for being coincident with a vertical projection of a shell (211) of one cylindrical battery (210) of adjacent cylindrical batteries (210) in the battery unit (200) on the first bus part (110);

the second edge (1112) is configured to coincide with a perpendicular projection of a housing (211) of another cylindrical cell (210) of adjacent cylindrical cells (210) within the battery unit (200) onto the first bus bar (110).

5. The busbar according to claim 4, wherein the first edge (1111) and the second edge (1112) are both arc-shaped; and each of the first edge (1111) and the second edge (1112) protrudes toward the first notch (111).

6. The bus bar of claim 5, wherein the first bus bar portion (110) further comprises an arcuate first intermediate edge (1113), the first intermediate edge (1113) connecting the first edge (1111) at one end and the second edge (1112) at the other end.

7. The busbar according to any of claims 1 to 6, wherein the busbar body (100) comprises a second busbar portion (120); the notch comprises a second notch (121) arranged on the second confluence part (120), and the second notch (121) surrounds at least part of a pole column (212) of the cylindrical battery (210) in the battery unit (200).

8. The busbar according to claim 7, characterized in that the second busbar portion (120) comprises a body region and a connection region for connecting the pole (212), the connection region protruding from the body region and corresponding in shape to the pole (212);

the second notch (121) is at least arranged at one connecting position of the body area and the connecting area.

9. The busbar according to claim 8, wherein the second busbar portion (120) comprises a third edge (1211) and a fourth edge (1212), the third edge (1211) being located in the connection region and the fourth edge (1212) being located in the body region;

the third edge (1211) is connected with one end of the fourth edge (1212) to form the second notch (121) around.

10. The busbar according to claim 9, wherein the second busbar portion (120) further comprises an arcuate second intermediate edge (1213), the second intermediate edge (1213) connecting the third edge (1211) at one end and the fourth edge (1212) at the other end.

11. A battery pack characterized by comprising the busbar and the battery unit (200) according to any one of claims 1 to 10, the busbar body (100) in the busbar being connected to the battery unit (200); wherein,

the battery unit (200) comprises a cylindrical battery (210);

in the circumferential direction of the cylindrical battery (210), a notch provided at the edge of the busbar body (100) surrounds at least part of the cylindrical battery (210).

12. The battery pack according to claim 11, wherein the cylindrical battery (210) comprises a housing (211) and a terminal post (212) disposed protruding from the housing (211), wherein:

the pole column (212) is used as a first electrode terminal, and the end face, far away from the cylindrical battery (210), of the pole column (212) protruding out of the shell (211) is used as a leading-out face of the first electrode terminal;

the shell is used as a second electrode terminal with the polarity opposite to that of the first electrode terminal, and the end face, corresponding to the shell (211), of the pole column (212) protrudes out of the shell (211) is used as a leading-out face of the second electrode terminal.

13. The battery pack according to claim 12, wherein the bus bar body (100) is located on the side of the cylindrical cells (210) where the first electrode terminals are provided, wherein:

the first confluence part (110) is provided with a through hole, the first electrode terminal is arranged in the through hole in a penetrating way, and the first confluence part (110) is abutted against the leading-out surface of the second electrode terminal;

the connection region of the second bus bar part (120) is adapted to the shape of the first electrode terminal, and the second bus bar part (120) is abutted against the lead-out surface of the first electrode terminal through the connection region.

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