Busbar and battery pack

Abstract

The application relates to the technical field of batteries and discloses a busbar and a battery pack. The busbar comprises a busbar body, the busbar body comprises at least one bus unit, the bus unit comprises a first bus member and a second bus member with opposite polarities, the first bus member is provided with a first connecting part, the first connecting part is formed with a protruding structure, the protruding structure is used for abutting against an end face of a battery shell serving as a first electrode terminal, and the second bus member is provided with a second connecting part, the second connecting part is used for abutting against an end face of a pole serving as a second electrode terminal. The protruding structure can compensate for a height difference between the end face of the battery shell and the pole, so that effective connection between the busbar and the battery is realized. Meanwhile, the first bus member and the second bus member are arranged in the same layer, the space occupied by the busbar can be reduced along the arrangement direction of the battery and the busbar body, and therefore the space utilization rate in the battery pack can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a busbar and a battery pack. BACKGROUND

[0002] A battery pack is provided with a plurality of batteries, and a plurality of battery cells are connected in series and in parallel to achieve the required voltage and capacity of the product. When the battery pack is used, positive busbars and negative busbars are used to connect the batteries to output the voltage and other signals in the battery pack.

[0003] However, the existing positive busbars and negative busbars are stacked, which occupies a large space and is not conducive to the miniaturization design of the battery pack. SUMMARY

[0004] The present application provides a busbar and a battery pack to reduce the volume of the busbar and improve the space utilization in the battery pack.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] According to a first aspect of the present application, a busbar is provided, comprising: a busbar body, the busbar body comprising at least one bus unit, the bus unit comprising a first bus member and a second bus member with opposite polarities, wherein:

[0007] The first bus member is provided with a first connecting portion, the first connecting portion is formed with a protruding structure, and the protruding structure is used to abut against an end face of a battery shell serving as a first electrode terminal;

[0008] The second bus member is provided with a second connecting portion, the second connecting portion is used to abut against an end face of a pole serving as a second electrode terminal, and the end face of the pole and the end face of the battery shell are located on the same side of the battery.

[0009] The busbar provided by the present application comprises at least one bus unit, and the bus unit comprises a first bus member and a second bus member with opposite polarities. When the busbar provided by the present application is applied, the busbar body can be arranged on the side of the battery leading pole, the first connecting portion of the first bus member is used to connect the first electrode terminal of the battery, and the second connecting portion of the second bus member is used to connect the second electrode terminal of the battery. Specifically, the protruding structure protruding towards the battery direction formed on the first connecting portion abuts against the end face of the battery shell serving as the leading position of the first electrode terminal, and the second connecting portion abuts against the end face of the pole serving as the leading position of the second electrode terminal.

[0010] It is worth noting that in the busbar provided in this application, the protruding structure can compensate for the height difference between the end face of the battery casing and the terminal post, thereby achieving an effective connection between the busbar and the battery. Simultaneously, the first and second busbars 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 within the battery pack.

[0011] According to a second aspect of this application, a battery pack is provided, including a bus as provided in any of the above technical solutions.

[0012] The battery pack provided in this application includes a busbar comprising at least one busbar unit, and the busbar unit includes a first busbar and a second busbar with opposite polarities. When using the busbar provided in this application, the busbar body can be disposed on the side of the battery lead-out terminal, and the first electrode terminal of the battery can be connected using the first connecting portion of the first busbar, and the second electrode terminal of the battery can be connected using the second connecting portion of the second busbar. Specifically, the protruding structure formed on the first connecting portion protruding towards the battery abuts against the end face of the battery casing, which serves as the lead-out point of the first electrode terminal, and the second connecting portion abuts against the end face of the terminal post, which serves as the lead-out point of the second electrode terminal.

[0013] It is worth noting that in the battery pack provided in this application, the protruding structure can compensate for the height difference between the end face of the battery casing and the terminal post, thereby achieving an effective connection between the busbar and the battery. Simultaneously, the first and second busbars 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 within the battery pack. Attached Figure Description

[0014] To better understand this disclosure, reference may be made to the embodiments shown in the following figures. Components in the figures are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of this disclosure. Additionally, related elements or components may have different arrangements as known in the art. Furthermore, in the figures, the same reference numerals denote the same or similar components in various figures. Wherein:

[0015] Figure 1 This is a schematic diagram of a battery pack provided in an embodiment of this application;

[0016] Figure 2 A schematic diagram of a bus structure provided in an embodiment of this application;

[0017] Figure 3 for Figure 1 Explosion diagram of the middle structure;

[0018] Figure 4 for Figure 3 Enlarged schematic diagram of the first busbar in the middle;

[0019] Figure 5 FIG. 1 is a structural schematic diagram of a fixing member in an embodiment of the present application.

[0020] The reference signs are explained as follows:

[0021] 10 - first bus member; 11 - first connecting portion; 20 - second bus member; 21 - second connecting portion; 30 - battery; 31 - first electrode terminal; 32 - second electrode terminal; 40 - extension section; 41 - profiled notch; 50 - bent portion; 60 - fixing member; 61 - first placement space; 62 - second placement space; 63 - first hollow portion; 64 - second hollow portion; 65 - first clamping buckle; 66 - second clamping buckle; 67 - first clamping plate. DETAILED DESCRIPTION

[0022] The technical solutions in the example embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the example embodiments of the present application. The example embodiments described herein are only for illustrative purposes, and are not intended to limit the protection scope of the present application, and therefore it should be understood that various modifications and changes can be made to the example embodiments without departing from the protection scope of the present application.

[0023] In the description of the present application, unless explicitly defined and limited, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" means two or more; the term "and / or" includes any combination and all combinations of one or more associated listed items. In particular, referring to "the" object or "one" object is also intended to represent one of the possible multiple such objects.

[0024] Unless otherwise specified or explained, the terms "connection", "fixing", and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integrally connected, or electrically connected, or signal connected; "connection" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Further, in the description of the present disclosure, it needs to be understood that the orientation words such as "upper", "lower", "inner", "outer" and the like described in the example embodiments of the present disclosure are described in the angle shown in the drawings, and should not be understood as the limitation of the example embodiments of the present disclosure. It also needs to be understood that in the context, when referring to one element or feature connected to another element (one or more) "on", "under", or "inner", "outer", it can not only be directly connected to another element (one or more) "on", "under", or "inner", "outer", but also indirectly connected to another element (one or more) "on", "under", or "inner", "outer" through an intermediate element.

[0026] The present application provides a battery pack. Figure 1 A structural schematic diagram of the battery pack provided by the present application is shown in FIG. 1. As shown in the structure, Figure 1 the battery pack provided by the present application includes a busbar, and the structural example of the busbar is shown in FIG. 2. Figure 2

[0027] Please continue to refer to Figure 1 the structure shown in FIG. 1, the battery pack provided by the present application further includes a plurality of batteries 30, and the busbar is arranged on one side of the battery 30 and connected with the battery 30 to export the signal in the plurality of series or parallel connected batteries 30. For example, one end of the circuit board is connected with the busbar, and the other end is connected with an external output port to output the signal collected by the busbar. The circuit board can be a flexible printed circuit (FPC) to facilitate the installation operation of the circuit board. Of course, other structures of the circuit board can also be selected according to the needs, which will not be described here.

[0028] Figure 3 For Figure 1 the explosion schematic diagram of the battery pack. As shown in the structure, Figure 3 for example, the plurality of batteries 30 are arranged along the first direction, and the batteries 30 between adjacent rows are staggered. It is worth noting that, Figure 3 in the example shown in FIG. 3, nine batteries 30 form a battery unit (the structure in the dashed line box), and two adjacent battery units along the first direction are arranged staggered. Of course, the number and structure of the batteries 30 in the battery pack are not limited to Figure 3 the structure shown in FIG. 3, which will not be described here.

[0029] Please continue to refer to Figure 3 the structure shown in FIG. 1, in one embodiment, the battery 30 can be a cylindrical battery. Of course, the battery 30 can also be a square battery, which will not be described here. Please continue to refer to Figure 3 the structure shown in FIG. 4, each battery 30 includes a first electrode terminal 31 and a second electrode terminal 32. For example, Figure 3 ​For example, the battery 30, the first electrode terminal 31 is a battery shell, the second electrode terminal 32 is a pole, and at least part of the pole protrudes from the battery shell, wherein the lead-out of the battery shell is the end face of the battery shell, the lead-out of the pole is the end face of the pole protruding from the battery shell, the end face of the battery shell and the end face of the pole are located on the same side of the battery 30, and the end face of the pole is higher than the end face of the battery shell. It should be understood that Figure 3 The explosion direction of each structure in the explosion schematic is parallel to the extension direction of the pole axis, and the direction is exemplarily defined as the second direction.

[0030] It is worth noting that the first electrode terminal 31 and the second electrode terminal 32 are opposite in polarity and are insulated between them. Specifically, when the first electrode terminal 31 is a positive polarity terminal, the second electrode terminal 32 is a negative polarity terminal, and vice versa, when the first electrode terminal 31 is a negative polarity terminal, the second electrode terminal 32 is a positive polarity terminal.

[0031] Exemplarily, the following description is taken as an example that the first electrode terminal 31 is a negative polarity terminal and the second electrode terminal 32 is a positive polarity terminal.

[0032] It is worth noting that the battery pack provided by the embodiment of the application is the busbar in any of the following technical solutions.

[0033] Please refer to Figure 2 and Figure 3 The busbar provided by the embodiment of the application is arranged on the side of the battery 30 leading out the pole, and the busbar includes a busbar body, the busbar body includes at least one bus unit, the bus unit includes a first bus member 10 and a second bus member 20 opposite in polarity, wherein:

[0034] The first bus member 10 is provided with a first connecting part 11, the first connecting part 11 is formed with a protruding structure, and the protruding structure is used to abut against the end face of the battery shell as the first electrode terminal 31;

[0035] The second bus member 20 is provided with a second connecting part 21, the second connecting part 21 is used to abut against the end face of the pole as the second electrode terminal 32, and the end face of the pole and the end face of the battery shell are located on the same side of the battery 30.

[0036] When the busbar provided by the embodiment of the application is applied, the busbar body can be arranged on the side of the battery 30 leading out the pole, the first connecting part 11 of the first bus member 10 is used to connect the first electrode terminal 31 of the battery 30, and the second connecting part 21 of the second bus member 20 is used to connect the second electrode terminal 32 of the battery 30. The polarity of the first bus member 10 is the same as that of the first electrode terminal 31, and the polarity of the second bus member 20 is the same as that of the second electrode terminal 32. Exemplarily, the first bus member 10 is a negative polarity bus part, and the second bus member 20 is a positive polarity bus part.

[0037] It should be noted that the protruding structure formed on the first connecting portion 11 abuts against the end surface of the battery case as the lead-out portion of the first electrode terminal 31, and the second connecting portion 21 abuts against the end surface of the pole as the lead-out portion of the second electrode terminal 32.

[0038] It should be noted that the protruding structure in the busbar provided by the embodiment of the present application can compensate for the height difference between the end surface of the battery case and the pole in the second direction, so as to achieve effective connection between the busbar and the battery 30. Meanwhile, the first bus member 10 and the second bus member 20 are arranged in 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.

[0039] In one embodiment, please continue to refer to the structure shown in Figure 3 Each first bus member 10 corresponds to one battery cell, and each first bus member 10 is provided with a first connecting portion 11 at the position of each battery 30 in the corresponding battery cell. For example, the first bus member 10 is provided with a first connecting portion 11 at the position of the end surface of the case of the corresponding battery 30. Similarly, each second bus member 20 corresponds to the same battery cell, and each second bus member 20 is provided with a second connecting portion 21 at the position of each battery 30 in the corresponding battery cell. For example, the second bus member 20 is provided with a second connecting portion 21 at the position of the pole of the corresponding battery 30.

[0040] In one embodiment, the protruding structure can be formed by stamping the plate body forming the first bus member 10. Specifically, please refer to the structure shown in Figure 4 The protruding structure is protruding towards the side of the end surface of the battery case, and is recessed away from the side of the end surface of the battery case. 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 surface of the battery case.

[0041] Specifically, for example, when connecting the first bus member 10 and the end surface of the battery case, a penetrating welding method can be used, in which the welding gun enters from the recessed side of the protruding structure, penetrates through the protruding structure, and welds the protruding structure and the end surface of the battery case together. It should be understood that this connection method can enhance the stability of the connection between the first bus member 10 and the first electrode terminal 31.

[0042] Please refer to Figure 4The protruding size h of the protruding structure needs to be adjusted according to the height of the pole to meet the condition that the protruding structure is in contact with the battery shell while the pole is in contact with the second connecting part 21. For example, the protruding height of the protruding structure in the second direction can be set as 0 < h ≤ 6 mm to adapt to the height difference between the pole and the battery shell. For example, the value of h can be set as 1 mm, 2 mm, 3 mm, 4 mm, 5 mm or 6 mm.

[0043] In one embodiment, the vertical projection of the protruding structure on the end surface of the shell extends along the circumference of the shell.

[0044] For further reference, please refer to Figure 3 As shown in the structure, when the battery 30 is a cylindrical battery. The battery shell can be cylindrical, the projection of the protruding structure on the end surface of the battery shell is arc-shaped, and the arc-shaped structure is adapted to the shape of the battery shell. For example, the arc-shaped structure is arranged along the circular edge of the end surface of the shell. Of course, in order to ensure that the protruding structure is effectively connected with the end surface of the battery shell, a gap can be provided between the outer edge of the arc-shaped structure and the outer edge of the end surface of the battery shell.

[0045] In one embodiment, for further reference, please refer to Figure 4 As shown in the structure, in each current collecting unit, the first current collecting member 10 includes 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. Specifically, each extension section 40 corresponds to a row of battery cells 30 in each battery cell.

[0046] For further reference, please refer to Figure 1 and Figure 2 As shown in the structure, taking the cylindrical battery 30 as an example, the second current collecting member 20 is arranged between the two extension sections 40 along the arrangement direction of the two extension sections 40. Of course, the battery 30 can also be a square battery, which will not be described here.

[0047] It should be noted that the arrangement of the second current collecting member 20 between the two extension sections 40 can make the first current collecting member 10 and the second current collecting member 20 arranged in the same layer, avoiding the arrangement of the first current collecting member 10 and the second current collecting member 20 in layers along the second direction, so as to reduce the occupied space of the current collecting bar body along the second direction, thereby improving the space utilization rate in the battery 30.

[0048] In one embodiment, each extension section 40 is provided with a clearance opening on the side facing the other extension section 40, which is used to avoid the pole in the corresponding battery 30. Exemplarily, after the busbar is assembled with the battery 30, the clearance opening has a certain gap with the side edge of the pole, which can avoid the first busbar 10 from colliding with the pole, thereby avoiding the internal short circuit of the battery 30, and improving the stability of the battery 30. Of course, when the battery 30 is a square battery, the extension section 40 can be far away from the pole, and thus the extension section 40 can not be provided with a clearance opening, which can be set according to the requirements, and will not be described here.

[0049] In one embodiment, please continue to refer to Figure 4 the structure shown, along the extension direction of each extension section 40, the side of the extension section 40 away from the other extension section 40 is provided with a profiled notch 41 corresponding to the shape of the gap between the adjacent batteries 30.

[0050] It should be noted that since there can be a gap between the housings of the adjacent batteries 30 in the battery unit, the position of the corresponding part of each extension section 40 can be formed as a profiled notch 41 to reduce the weight of the busbar, increase the heat dissipation area inside the battery 30, and make the first connecting part 11 adaptable to a certain height difference. Specifically, the profiled notch 41 is provided on the extension section 40, so that the extension section 40 can have a certain elastic deformation amount, thereby allowing a slight deformation in the height direction to facilitate the welding operation.

[0051] Exemplarily, each monomer battery 30 in the battery unit is cylindrical, and there can be a gap (filled with dots) between the housings of each row of adjacent batteries 30 as shown in Figure 3 The profiled notch 41 is the same as or similar to the projection of the gap in the second direction.

[0052] It is worth noting that in one specific embodiment, the vertical projection of the profiled notch 41 can be larger than the vertical projection of the gap in the second direction to ensure that the corresponding area between the first busbar 10 and the end face of the battery housing is sufficient and can be effectively connected. In another specific embodiment, the vertical projection of the profiled notch 41 can be smaller than the vertical projection of the gap in the second direction to reduce the weight of the busbar, thereby reducing the overall weight of the battery 30.

[0053] Of course, in another specific embodiment, the vertical projection of the profiled notch 41 can be the same as the vertical projection of the gap in the second direction to reduce the weight of the busbar, increase the heat dissipation area inside the battery 30, and ensure that the corresponding area between the first busbar 10 and the end face of the battery housing is sufficient and can be effectively connected.

[0054] Please continue to refer to Figure 2 and Figure 3As shown in the structure, the shape of the second connecting portion 21 of the second busbar 20 can be similar to that of the second electrode terminal 32 to ensure the connecting area of the second connecting portion 21 and the second electrode terminal 32, thereby ensuring the overcurrent area and improving the overcurrent capacity.

[0055] For example, the second electrode terminal 32 is a pole, and the second connecting portion 21 is a circle similar to the circular end surface of the pole. It should be understood that the second connecting portion 21 is generally circular, and since the second busbar 20 needs to connect multiple poles of the battery 30 in the same battery cell, multiple second connecting portions 21 can be connected by a main structure, and at this time, the second connecting portion 21 can be slightly deformed in shape at the connection and form a circle.

[0056] Notably, the second connecting portion 21 and the second electrode terminal 32 can be connected by laser welding. In a specific embodiment, a positioning hole can be provided on the second connecting portion 21 to enable accurate positioning by a laser device, thereby improving the accuracy of welding.

[0057] Please continue to refer to Figures 1 to 3 As shown in the structure, the battery 30 in each battery cell is connected in parallel by the busbar provided by the embodiments of the present application.

[0058] Specifically, taking the first battery cell as an example in the first direction, the same second busbar 20 connects the second electrode terminals 32 of the nine batteries 30 in the same battery cell, and the same first busbar 10 connects the first electrode terminals 31 of the nine batteries 30 in the same battery cell. The first busbar 10 and the second busbar 20 are insulated from each other, and the nine batteries 30 in the same battery cell are connected in parallel.

[0059] The adjacent battery cells are connected in series by the busbar. Specifically, the first busbar 10 of one of the adjacent battery cells and the second busbar 20 of the other battery cell are integrated, or the second busbar 20 of one of the adjacent battery cells and the first busbar 10 of the other battery cell are integrated. For example, taking two adjacent battery cells as an example in the first direction, the second busbar 20 connected to the previous battery cell is connected to the first busbar 10 connected to the next battery cell, i.e., the second polarity structure of the previous battery cell is connected to the first polarity structure of the next battery cell, and the adjacent battery cells are connected in series.

[0060] Notably, different series and parallel connections of the multiple batteries 30 in the battery pack can enable the battery pack to achieve the required voltage and capacity of the product to meet the demand.

[0061] It should be understood that the connection structure between the second busbar 20 of the corresponding adjacent battery cell and the first busbar 10 can be formed by an integrated molding process to simplify the installation and preparation process and improve efficiency. At the same time, it is worth noting that the integrated molding arrangement can increase the connection area between the second busbar 20 of the corresponding adjacent battery cell and the first busbar 10 to increase the flow area and ensure the flow capacity.

[0062] Of course, other structures can also be used to connect the second busbar 20 of the corresponding adjacent battery cell and the first busbar 10. For example, a connecting plate or a connecting wire can be used, which will not be described here.

[0063] Please continue to refer to Figure 4 The structure shown, the busbar provided by the embodiment of the application further has a bending part 50 for fixing the busbar body. The bending part 50 can be connected with the first busbar 10 or the second busbar 20. Specifically, when one end of the first busbar 10 is located at the edge position, the busbar body can be fixed on the box body on which the battery 30 is placed through the bending part 50.

[0064] It should be understood that the bending part 50 can have an included angle with the first busbar 10 or the second busbar 20 to better adapt to the space arrangement of the box body or match the arrangement shape of the battery 30 in the battery cell.

[0065] In one embodiment, please continue to refer to Figure 1 and Figure 3 The structure shown, the busbar provided by the embodiment of the application further includes a fixing part 60 for bearing the first busbar 10 and the second busbar 20 of the busbar body.

[0066] It should be noted that the use of the fixing part 60 can facilitate the installation operation of the first busbar 10 and the second busbar 20. Specifically, during the installation process, the fixing part 60, the first busbar 10 and the second busbar 20 can be moved as a whole, which can simplify the installation process and improve the assembly efficiency. At the same time, in the battery pack provided by the embodiment of the application, the fixing part 60 can pre-fix the positions of the first busbar 10 and the second busbar 20 to improve the accuracy of the connection alignment of the first busbar 10 and the second busbar 20 with the battery 30.

[0067] In a specific embodiment, as Figure 5 shown, in the fixing part 60 provided by the embodiment of the application, one side of the fixing part 60 is provided with a first placement space 61 and a second placement space 62. The fixing part 60 is provided with a first hollow part 63 in the part located in the first placement space 61, and the fixing part 60 is provided with a second hollow part 64 in the part located in the second placement space 62.

[0068] Specifically, the first busbar 10 can be placed in the first placement space 61, and the second busbar 20 can be placed in the second placement space 62. Meanwhile, when the busbar unit is used to realize the parallel connection of the plurality of battery cells 30, the first busbar 10 is used to connect the first electrode terminals 31 of the plurality of battery cells 30, and the second busbar 20 is used to connect the second electrode terminals 32 of the plurality of battery cells 30; the first placement space 61 and the second placement space 62 can be insulatively arranged to avoid short circuit between the first busbar 10 and the second busbar 20 in the busbar unit.

[0069] It should be understood that the first placement space 61 is the same or similar in shape to the first busbar 10. For example, the first placement space 61 can be arranged to be in shape suitable for the first busbar 10. Alternatively, the first placement space 61 can be arranged to be larger in volume than the first busbar 10. Of course, the second placement space 62 and the second busbar 20 can be similarly arranged, which will not be described here.

[0070] It is worth noting that when the first hollow part 63 is arranged, the first hollow part 63 can be arranged to be larger in shape than the protruding structure, so that the protruding structure extends into the first hollow part 63 from the side away from the battery 30 to be connected with the end face of the battery shell. As shown in Figure 3 Figure 5 Figure 4 For example, in a specific embodiment, the first hollow part 63 on the fixing member 60 is in shape suitable for 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 of the protruding structure with the battery 30.

[0071] Please continue to refer to the structure shown in Figures 3 to 5 When the second hollow part 64 is arranged, it can be similar in shape to the pole of the battery 30. For example, the second hollow part 64 is a circular structure concentric with the pole, and the area of the second hollow part 64 is not less than the area of the pole. It should be understood that this structure arrangement can maximize the connection area between the second connecting part 21 and the pole to improve the stability of the connection between the second busbar 20 and the battery 30.

[0072] Of course, the second hollow part 64 can be arranged in other structures and shapes, which will not be described here.

[0073] In a specific embodiment, please continue to refer to the structure shown in Figure 3 The fixing member 60 is arranged between the battery 30 and the busbar body, and the first placement space 61 and the second placement space 62 are arranged on the side of the fixing member 60 away from the battery 30.

[0074] ​​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 positionally corrected relative to the battery 30 by the fixing member 60.

[0075] Meanwhile, the depth of the first placement space 61 and the second placement space 62 in the second direction can be set such that the first busbar 10 and the second busbar 20 are coplanar on the side surface away from the battery 30. It should be noted that the "coplanar" includes complete coplanar or approximate coplanar, and due to the influence of the preparation process, there can be a slight height difference between the first busbar 10 and the second busbar 20 on this side.

[0076] Of course, in another specific embodiment, the first placement space 61 and the second placement space 62 can also be arranged on the side of the fixing member 60 facing the battery 30, so as to quickly install the busbar body by using the fixing member 60, and details are not described again.

[0077] It should be noted that when the fixing member 60 is arranged between the battery 30 and the busbar body, after the first busbar 10 and the second busbar 20 are fixed by the fixing member 60 provided in the embodiments of the present application, the connection operation between the first busbar 10 and the battery 30 can be realized through the first hollow part 63 corresponding to the first connecting part 11. Meanwhile, the connection operation between the second busbar 20 and the battery 30 can be realized through the second hollow part 64 corresponding to the second connecting part 21.

[0078] In one embodiment, in order to realize the insulation between the first placement space 61 and the second placement space 62, the fixing member 60 can be arranged to include an insulating member. Specifically, the fixing member 60 can be arranged as an insulating structure as a whole, or the fixing member 60 can be arranged to be prepared from an insulating material or covered with an insulating material.

[0079] It should be noted that when the fixing member 60 is an insulating structure as a whole, the insulation effect between the first placement space 61 and the second placement space 62 can be better guaranteed, so as to avoid the short circuit phenomenon and improve the safety performance of the battery 30.

[0080] When the structure of the fixing member 60 is specifically arranged, in one embodiment, the fixing member 60 can be arranged to include a body and a separation rib arranged on one side of the body, and the separation rib separates the body into the first placement space 61 and the second placement space 62, for example, as shown in Figure 5 .

[0081] It should be noted that the structure of separating the one side of the body into the first placement space 61 and the second placement space 62 makes the overall structure of the fixing member 60 simple, so as to simplify the preparation process and improve the preparation efficiency.

[0082] It should be understood that when the partitioning ribs are arranged, the first placement space 61 and the second placement space 62 can share part of the partitioning ribs. Of course, the first placement space 61 and the second placement space 62 can also be separated by independent partitioning ribs, which will not be described here.

[0083] It should be noted that in order to prevent the busbar body from being pulled out of the fixing member 60, various structures can be selected to assist in fixing the busbar body and the fixing member 60.

[0084] In one embodiment, the fixing member 60 and the busbar body can be fixed by a clamping structure.

[0085] Illustratively, a first clamping buckle 65 can be arranged near the first placement space 61 to fix the first busbar 10 in the first placement space 61.

[0086] It should be noted that this structure can prevent the first busbar 10 from being pulled out of the first placement space 61 and enhance the stability of the first busbar 10 in the first placement space 61.

[0087] In a specific embodiment, the partitioning rib forming the first placement space 61 is provided with the first clamping buckle 65.

[0088] In another specific embodiment, the first placement space 61 is provided with the first clamping buckle 65.

[0089] In another specific embodiment, the partitioning rib forming the first placement space 61 and the first placement space 61 are both provided with the first clamping buckle 65.

[0090] It should be understood that when the first placement space 61 and the partitioning rib are both provided with the first clamping buckle 65, the stability of the first busbar 10 in the first placement space 61 can be improved.

[0091] It should be noted that the number and arrangement of the first clamping buckles 65 can be arranged as required. Illustratively, a plurality of first clamping buckles 65 can be arranged along the extension direction of the partitioning rib or the first placement space 61 to fix the first busbar 10 at multiple positions and improve the stability of the first busbar 10.

[0092] In the specific structure of the first clamping buckle 65, as shown in Figure 5 The first clamping buckle 65 can be formed by a first clamping plate 67, the first clamping plate 67 including a connecting portion and a clamping portion, the clamping portion being used to clamp the first busbar 10; one end of the connecting portion is connected to the clamping portion, the other end is connected to the bottom of the notch of the partitioning rib, and the connecting portion has a gap with the side wall of the notch.

[0093] It is worth noting that when the first clamping buckle 65 is formed by the first clamping plate 67, the deformation amount of the first clamping buckle 65 relative to the body can be increased due to the gap between the first clamping plate 67 and the side wall of the notch, thereby facilitating the movement of the first busbar 10 into or out of the first placement space 61.

[0094] For example, the second clamping buckle 66 can be arranged near the second placement space 62 to fix the second busbar 20 in the second placement space 62.

[0095] It should be noted that this structure can prevent the second busbar 20 from escaping from the second placement space 62 and can enhance the stability of the second busbar 20 after being placed in the second placement space 62.

[0096] In a specific embodiment, the partition rib forming the second placement space 62 is provided with the second clamping buckle 66.

[0097] In another specific embodiment, the second placement space 62 is provided with the second clamping buckle 66.

[0098] In another specific embodiment, the partition rib forming the second placement space 62 and the second placement space 62 are both provided with the second clamping buckle 66.

[0099] It should be understood that when the second placement space 62 and the partition rib are both provided with the second clamping buckle 66, the stability of the second busbar 20 in the first placement space 61 can be improved.

[0100] Similarly, the number and arrangement position of the second clamping buckle 66 can be arranged as required, and will not be described here.

[0101] In another embodiment, the busbar body and the fixing member 60 are connected by adhesive bonding. It should be understood that the adhesive bonding is simple and easy to operate, and can reduce the difficulty of assembly operation.

[0102] In another embodiment, the busbar body and the fixing member 60 are connected by riveting. For example, hot riveting can be used. It should be understood that the riveting connection can enhance the stability of the assembly of the busbar body and the fixing member 60.

[0103] Of course, any combination of clamping, bonding or riveting can be used to fix the fixing member 60 and the busbar body to improve the stability of the assembly, which will not be described here.

[0104] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the concepts disclosed herein. It is intended that the disclosure be construed as including any paterns of this disclosure that can be presented during prosecution of the patent application. Specification and drawings are, therefore, to be regarded in an illustrative rather than a restrictive sense. The true scope and spirit of the disclosure are indicated by the appended claims.

[0105] It is to be understood that the disclosure is not limited to the precise construction hereinafter described and as shown in the attached drawings, and that various changes in shape, size and arrangements of parts can be made without departing from the scope of the present disclosure. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A busbar, characterized in that The busbar body comprises at least one bus unit, the bus unit comprises a first bus member (10) and a second bus member (20) with opposite polarities, wherein: The first bus member (10) is provided with a first connecting portion (11), the first connecting portion (11) is formed with a protruding structure, the protruding structure is used for abutting against the end face of the battery shell as a first electrode terminal (31); The second bus member (20) is provided with a second connecting portion (21), the second connecting portion (21) is used for abutting against the end face of the pole as a second electrode terminal (32), and the end face of the pole and the end face of the battery shell are located on the same side of the battery (30), and the end face of the pole is higher than the end face of the battery shell; The first bus member (10) comprises two oppositely arranged extension segments (40), and the extension direction of the extension segment (40) is perpendicular to the arrangement direction of the two extension segments (40). The protruding structure is formed by one-piece stamping of the first bus member (10).

2. The busbar of claim 1, wherein The vertical projection of the protruding structure on the end face of the battery shell extends along the circumferential direction of the battery shell.

3. The busbar according to claim 1 or 2, characterized in that In the bus unit, 4. The busbar of claim 1 or 2, wherein Along the arrangement direction of the two extension segments (40), the second bus member (20) is arranged between the two extension segments (40). Each extension segment (40) is provided with a clearance on the side facing the other extension segment (40), and the clearance is used for avoiding the pole in the corresponding battery (30).

5. The busbar of claim 4, wherein, Further comprising a fixing member (60), the fixing member (60) carries the first bus member (10) and the second bus member (20).

6. The busbar of claim 1 or 2, wherein The fixing member (60) is arranged between the battery (30) and the busbar body, and the fixing member (60) is provided with a first hollow portion (63) corresponding to the first connecting portion (11), and the fixing member (60) is provided with a second hollow portion (64) corresponding to the second connecting portion (21).

7. The busbar of claim 6, wherein, When the bus unit is used to realize parallel connection of a plurality of batteries (30), the first bus member (10) is used to connect the first electrode terminals (31) of the plurality of batteries (30), and the second bus member (20) is used to connect the second electrode terminals (32) of the plurality of batteries (30).

8. The busbar of claim 7, wherein, The fixing member (60) comprises an insulating member, and the first bus member (10) and the second bus member (20) in the bus unit are arranged in insulation through the insulating member. The busbar comprises the bus unit according to any one of claims 1-8.

9. A battery pack characterized by comprising: Further comprising a battery (30), the battery (30) comprises a battery shell as a first electrode terminal (31) and a pole as a second electrode terminal (32), the first electrode terminal (31) and the second electrode terminal (32) are opposite in polarity; the busbar is arranged on the side of the battery (30) where the pole is arranged, and the first bus member (10) of the busbar abuts against the end face of the battery shell, and the second bus member (20) of the busbar abuts against the end face of the pole, and the end face of the battery shell and the end face of the pole are located on the same side of the battery (30).

10. The battery pack of claim 9, wherein, ​ 11. The battery pack of claim 10, wherein, The battery (30) is a cylindrical battery. The battery (30) is a cylindrical battery.

Images