Integrated busbar

Abstract

The utility model discloses an integrated busbar which comprises a wire harness mainboard and a clamping assembly, the clamping assembly comprises a shell, a first clamping piece and a second clamping piece, the shell extends and penetrates through the wire harness mainboard in the direction of a first axis, and the shell is provided with a hollow mounting cavity; the first clamping piece is arranged in the mounting cavity, and the first clamping piece can extend out of the mounting cavity and is located at a first position on one side of the wire harness mainboard; the second clamping piece is rotatably installed on the shell around the first axis, at least part of the second clamping piece is arranged outside the installation cavity, the second clamping piece is located at the second position of the other side of the wire harness main board, and the shape of the end, in the direction of the first axis, of the second clamping piece is configured to be used for driving the first clamping piece. The first clamping piece extends out of the shell to a first position in the radial direction of the first axis. Therefore, the clamping assembly can clamp and fix at least one layer of tabs and the wire harness main board, so that the tabs and the wire harness main board are arranged in an attached mode, the fit clearance between the tabs and the fit clearance between the tabs and the wire harness main board are guaranteed, then the welding quality of the tabs is guaranteed, and the welding yield and the welding takt are improved. Meanwhile, after welding is completed, the clamping assembly can be taken down from the wire harness main board.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to an integrated busbar. Background Technology

[0002] The integrated busbar (CCS, Cells Contact System) mainly consists of a wiring harness mainboard (FPC, PCB, FFC, etc.), plastic structural components, and copper / aluminum busbars (also known as busbars). It typically connects the various component layers into a single unit through a thermoforming process, enabling high-voltage series and parallel connection of battery cells, as well as battery temperature and cell voltage sampling functions. It provides temperature and voltage data to the BMS system via the FPC / PCB and connector assemblies, and is thus part of the BMS system.

[0003] Currently, during the welding process of individual battery cells (i.e., the aforementioned cells) and busbars, it is necessary to ensure the gaps between the tabs and between the tabs and the busbars to prevent problems such as explosions and splashes.

[0004] In related technologies, during the welding process between the tab and the busbar, a clamping mechanism is used to press and fix the tab and the busbar together to ensure the fit clearance between the tabs and the busbar. This makes the welding process between the tab and the busbar of the battery cell cumbersome and affects the welding efficiency between the tab and the busbar. Utility Model Content

[0005] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide an integrated busbar that has a good connection and cooperation effect with the battery cell.

[0006] According to an embodiment of this application, the integrated busbar is used for connection and cooperation with a battery cell, and the integrated busbar includes: a wire harness main board and a clamping assembly. The clamping assembly includes: a housing, a first clamping member, and a second clamping member. The housing passes through the wire harness main board along a first axis and has a hollow mounting cavity. The first clamping member is disposed in the mounting cavity and can extend outside the mounting cavity, located at a first position on one side of the wire harness main board. The second clamping member is rotatably mounted on the housing about the first axis. The second clamping member has at least a portion disposed outside the mounting cavity and located at a second position on the other side of the wire harness main board. One end of the second clamping member along the first axis is shaped to drive the first clamping member. The first clamping member extends out of the housing in the radial direction along the first axis. In a first state, the second clamping member is located inside the mounting cavity. In a second state, at least a portion of the first clamping member protrudes from the mounting cavity and can cooperate with the second clamping member to perform a clamping function.

[0007] In this application, the integrated busbar is provided with a clamping component, which can clamp and fix at least one layer of tabs to the wire harness motherboard to achieve a close fit between the tabs and the wire harness motherboard, thereby ensuring the fit clearance between the tabs and the tabs and between the tabs and the wire harness motherboard, thus ensuring the welding quality at the tabs and improving the welding yield and welding cycle time.

[0008] According to some embodiments of this application, the wiring harness motherboard is provided with a plurality of busbars spaced apart, the busbars including electrical connectors for electrical connection with the tabs of the battery cells.

[0009] According to some embodiments of this application, the second clamping member includes: a clamping section, a portion of which protrudes from the outer peripheral wall of the housing in the radial direction along the first axis; a driving section for driving the first clamping member to extend in the radial direction along the first axis; and a connecting shaft connecting the clamping section and the driving section in the direction along the first axis.

[0010] According to some embodiments of this application, the housing is provided with a shaft hole arranged along the first axis, and the connecting shaft passes through the shaft hole and is rotatably engaged with the shaft hole.

[0011] According to some embodiments of this application, the first clamping member forms an abutment surface on the side of the drive segment in the radial direction of the first axis, the abutment surface being used to abut against the drive segment, and the drive segment having a drive protrusion protruding in the radial direction of the first axis, the drive protrusion being adapted to abut against the abutment surface and drive the first clamping member to extend out of the housing in the radial direction of the first axis.

[0012] According to some embodiments of this application, the housing is provided with a contact surface, and the first clamping member is provided with a mating surface, wherein the contact surface can abut against the mating surface; wherein, the contact surface is adapted to drive the first clamping member to move closer to the wire harness motherboard side relative to the housing when it extends outward in the radial direction along the first axis.

[0013] According to some embodiments of this application, the mating surface is located on the side of the first clamping member opposite to the main cable in the direction of the first axis, and the inclination angle of the contact surface relative to the first axis is smaller than the inclination angle of the mating surface relative to the first axis.

[0014] According to some embodiments of this application, the housing is provided with a guide groove that extends radially along the first axis, and the guide groove can guide and cooperate with the first clamping member in the direction of the first axis.

[0015] According to some embodiments of this application, the main board of the wiring harness is provided with a through hole that extends along the direction of the first axis, the through hole being used for the electrode tab to pass through and bend to be fixedly connected to the busbar.

[0016] According to some embodiments of this application, there are multiple sets of clamping components, and at least one set of clamping components is provided at the busbar.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of a battery module according to an embodiment of this application;

[0020] Figure 2 This is a top view of a battery module according to an embodiment of this application;

[0021] Figure 3 yes Figure 2 A cross-sectional view at the centerline AA;

[0022] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;

[0023] Figure 5 This is a schematic diagram of the integrated busbar structure according to an embodiment of this application;

[0024] Figure 6 yes Figure 5 A magnified view of a section at point C;

[0025] Figure 7 This is a schematic diagram of the structure of a clamping assembly according to an embodiment of this application;

[0026] Figure 8 This is a top view of a clamping assembly according to an embodiment of this application;

[0027] Figure 9 yes Figure 8 A cross-sectional view at the centerline DD;

[0028] Figure 10 This is a schematic diagram of the engagement of the first clamping member and the second clamping member according to an embodiment of this application.

[0029] Figure label:

[0030] Battery module 100;

[0031] Integrated busbar 10; battery cell 20; electrode tab 201;

[0032] Wiring harness mainboard 1; Busbar 101; Electrical connector 11; Via 12;

[0033] Clamping assembly 2; housing 21; mounting cavity 211; shaft hole 212; guide groove 213; contact surface 214; housing body 215; base 216; clearance groove 217;

[0034] First clamping element 22; mating surface 221; first clamping surface 222;

[0035] Second clamping member 23; clamping section 231; second clamping surface 2312; driving section 232; driving protrusion 2321; driving surface 2322; connecting shaft 233; anti-detachment part 234. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0037] The following is for reference. Figures 1-10 The integrated busbar 10 according to an embodiment of the present application is described. The integrated busbar 10 is used to connect and cooperate with the battery cell 20 to electrically connect the tab 201 of the battery cell 20 to the busbar 101.

[0038] According to an embodiment of this application, the integrated busbar 10 includes a wire harness main board 1 and a clamping assembly 2. The clamping assembly 2 is adapted to clamp and fix the tabs 201 of the battery cells 20 onto the wire harness main board 1 to realize electrical connections between the battery cells 20 and between the battery cells 20 and the wire harness main board 1.

[0039] Combination Figure 1 and Figure 5 As shown, the main board 1 of the wiring harness is provided with multiple busbars 101, and each busbar 101 is provided with an electrical connector 11 (usually a copper or aluminum bar). The electrical connector 11 is used to electrically connect with the tab 201 of the battery cell 20. In other words, the tab 201 of the battery cell 20 can be electrically connected to the busbar 101 by cooperating with the electrical connector 11.

[0040] Combination Figure 4 , Figure 7 and Figure 9As shown, the clamping assembly 2 includes: a housing 21, a first clamping member 22, and a second clamping member 23. The housing 21 extends through the wire harness mainboard 1 along a first axis and has a hollow mounting cavity 211. The first clamping member 22 is disposed within the mounting cavity 211 and can extend outside the mounting cavity 211, located at a first position on one side of the wire harness mainboard 1. The second clamping member 23 is rotatably mounted on the housing 21 about the first axis and has at least a partial location outside the mounting cavity 211, located at a second position on the other side of the wire harness mainboard 1. The second clamping member 23 is shaped at one end along the first axis to drive the first clamping member 22. The first clamping member 22 extends from the housing 21 to a first position along the radial direction of the first axis, so as to form a clamping structure below the wire harness main board 1 (i.e., the part of the first clamping member 22 extending out of the mounting cavity 211), thereby clamping and engaging the tab 201 and the wire harness main board 1, so that the tab 201 and the busbar can fit tightly together, ensuring the welding quality at the tab 201 and improving the electrical connection between the tab 201 and the integrated busbar 10.

[0041] Combination Figure 7 and Figure 9 As shown, the direction of the first axis is parallel to the Z-direction.

[0042] In the first state, the clamping assembly 2 has the first clamping member 22 located inside the mounting cavity 211; in the second state, at least a portion of the first clamping member 22 can extend out of the mounting cavity 211, and the first clamping member 22 and the second clamping member 23 work together to perform a clamping function.

[0043] Reference Figure 4 As shown, when the tab 201 is clamped and engaged with the wire harness motherboard 1 by the clamping assembly 2, the tab 201, the electrical connector 11, and the wire harness motherboard 1 are clamped and arranged between the first clamping member 22 and the second clamping member 23. Through the cooperation of the first clamping member 22 and the second clamping member 23, the tab 201, the electrical connector 11, and the PCB board are constrained in the axial direction of the first axis, so that the tab 201 and the electrical connector 11 are closely arranged, ensuring the welding gap between the tabs 201 and the electrical connector 11, thereby improving the welding engagement effect between the tab 201 and the integrated busbar 10, increasing the welding yield, and reducing the welding cycle time.

[0044] It should be noted that "welding cycle time" refers to the production time required to weld the tab 201 of the battery cell 20 to the integrated busbar 10. At the same time, improving the welding cycle time means shortening the production time required to weld the tab 201 of the battery cell 20 to the integrated busbar 10.

[0045] It is understood that the clamping assembly 2 has two states, namely a first state and a second state. When it is necessary to clamp the tab 201 to the wire harness motherboard 1 through the clamping assembly 2, the second clamping member 23 is driven to rotate, so that the first clamping member 22 is driven to extend out of the mounting cavity 211 through the second clamping member 23, thereby achieving clamping and engagement between the tab 201 and the wire harness motherboard 1 through the cooperation of the first clamping member 22 and the second clamping member 23; when the clamping assembly 2 is in the non-clamping state, at least part of the first clamping member 22 can be accommodated in the mounting cavity 211.

[0046] The portion of the second clamping member 23 extending out of the mounting cavity 211 is positioned on the side where the wire harness motherboard 1 and the tab 201 mate. When the tab 201 and the wire harness motherboard 1 are clamped together by the clamping assembly 2, the portion of the second clamping member 23 that mates with the tab 201 is located on the side surface of the tab 201 facing away from the wire harness motherboard 1. The second clamping member 23 and the first clamping member 22 clamp the tab 201 and the wire harness motherboard 1 together, so that the tab 201 can be fitted and arranged close to the wire harness motherboard 1 (e.g., at the electrical connector 11).

[0047] Currently, during the welding process between individual battery cells (i.e., the aforementioned cells) and busbars, it is necessary to ensure the clearance between the tabs and between the tabs and the busbars to prevent problems such as explosions and spatter. In related technologies, a clamping mechanism is used to press and fix the tabs and busbars together during the welding process to ensure the appropriate clearance between the tabs and between the tabs and the busbars. This makes the welding process between the cell's tabs and the busbars cumbersome and affects the welding efficiency.

[0048] It is understandable that the clamping mechanism needs to apply pressure to the tab during the welding process between the tab and the busbar to ensure the fit between the tab and the busbar. This results in the clamping mechanism having to tighten and loosen its constraints during the welding process between the tab and the busbar, which affects the welding efficiency between the tab and the busbar.

[0049] In this application, the integrated busbar 10 is provided with a clamping component 2. The clamping component 2 can clamp and fix at least one layer of tab 201 to the busbar 101 to achieve a close fit between the tab 201 and the busbar 101, thereby ensuring the fit clearance between tabs 201 and each other, and between tab 201 and the busbar 101, thus ensuring the welding quality at the tab 201, improving the welding yield and welding cycle time.

[0050] Meanwhile, after the busbar 101 in the integrated busbar 100 is welded to the tab 201 of the battery cell 20, the clamping assembly 2 can be removed from the main body of the wire board 1, thereby enabling the clamping assembly 2 to be reused.

[0051] Reference Figure 6and Figure 7 As shown, the clamping assembly 2 is in the second state. The first clamping member 22 and the second clamping member 23 can clamp and fix the tab 201 and the busbar 101 in the direction of the first axis, thereby achieving a good constraint effect between the tab 201 and the busbar 101 through the clamping assembly 2, ensuring the fit clearance between the tab 201 and the busbar 101.

[0052] It is understandable that during the clamping process between the tab 201 and the integrated busbar 10, the tab 201 is provided with clearance holes corresponding to the clamping component 2. When the tab 201 is stacked and arranged on the busbar 101, the clamping component 2 can be provided with clearance holes, so that the clamping part of the second clamping member 23 that cooperates with the tab 201 is located on the side of the tab 201 away from the busbar 101.

[0053] Further integration Figure 4 and Figure 6 As shown, by driving the second clamping member 23 to rotate around the first axis, part of the second clamping member 23 can be adjusted to a position corresponding to the tab 201 in the direction of the first axis, so that the second clamping member 23 can constrain the tab 201 on the side of the tab 201 away from the busbar 101.

[0054] The clearance hole formed on the tab 201 is not smaller than the projected area of ​​the clamping assembly 2 in the first axial direction, so as to ensure the clearance hole's clearance effect on the clamping assembly 2. Preferably, the opening size of the clearance hole is slightly larger than the projected area of ​​the clamping assembly 2 in the first axial direction.

[0055] Combination Figure 4 and Figure 10 As shown, in some embodiments of this application, the second clamping member 23 includes a clamping section 231, a driving section 232, and a connecting shaft 233. The clamping section 231 is disposed outside the housing 21, and a portion of the clamping section 231 protrudes from the outer peripheral wall of the housing 21 in the radial direction along the first axis. The driving section 232 is used to drive the first clamping member 22 to extend radially along the first axis. The connecting shaft 233 connects the clamping section 231 and the driving section 232 along the first axis, allowing the clamping section 231 to drive the driving section 232 to rotate synchronously via the connecting shaft 233.

[0056] It is understandable that the driving structure on the second clamping member 23, located at the clamping segment 231, can drive the driving segment 232 to move, thereby driving the first clamping member 22 to move relative to the housing 21. Simultaneously, the clamping segment 231 also has a clamping function. When the clamping segment 231 is adjusted to the second state, it is positioned corresponding to the tab 201 along the first axis, thus constraining the tab 201 on one side of the first axis. Furthermore, the driving segment 232 can drive the first clamping member 22 to extend outward from the mounting cavity 211, while the first clamping member 22 constrains the wire harness motherboard 1 on the other side of the first axis, ensuring a proper clamping fit between the tab 201 and the wire harness motherboard 1.

[0057] like Figure 4 As shown, in some embodiments of this application, the housing 21 is provided with a shaft hole 212 arranged along the direction of the first axis, and the connecting shaft 233 passes through the shaft hole 212, and the connecting shaft 233 is rotatably engaged with the shaft hole 212.

[0058] The shaft hole 212 has a circular opening shape, and the inner peripheral wall of the shaft hole 212 is adapted to fit against the outer peripheral surface of the connecting shaft 233 so as to support the connecting shaft 233 in the circumferential direction through the shaft hole 212, thereby improving the stability of the second clamping member 23 when rotating relative to the housing 21.

[0059] like Figure 4 As shown, in some embodiments of this application, an anti-detachment portion 234 is provided on the rotating shaft section. The anti-detachment portion 234 protrudes from the rotating shaft section in the radial direction along the first axis, and is located on the side of the housing 21 away from the clamping section 231 in the direction of the first axis, so as to prevent the second driving member from detaching from the housing 21 by limiting the engagement between the anti-detachment portion 234 and the housing 21. The clamping section 231 abuts against the other side surface of the housing 21 in the direction of the first axis to limit the engagement between the second clamping member 23 and the housing 21.

[0060] like Figure 10 As shown, in some embodiments of this application, the first clamping member 22 forms an abutment surface on the side of the first axis near the drive section 232 in the radial direction. The abutment surface is used to abut against the drive section 232. The drive section 232 has a drive protrusion 2321 that protrudes in the radial direction of the first axis. The drive protrusion 2321 is adapted to abut against the abutment surface and drive the first clamping member 22 to extend out of the housing 21 in the radial direction of the first axis.

[0061] like Figure 10As shown, the drive protrusion 2321 is used to drive and cooperate with the first clamping member 22. The drive surface 2322 of the drive protrusion 2321 can abut against the contact surface. As the drive protrusion 2321 rotates, the drive protrusion 2321 can drive the first clamping member 22 to extend outward of the mounting cavity 211, increasing the corresponding area between the first clamping member 22 and the wire harness motherboard 1, and improving the clamping cooperation effect between the clamping assembly 2 and the wire harness motherboard 1.

[0062] Reference Figure 10 In one specific embodiment of this application, the projection of each drive protrusion 2321 onto the direction of the first axis is semi-elliptical. It can be understood that when the drive protrusion 2321 is elliptical, the drive surface 2322 of the drive protrusion 2321 (i.e., the surface on which the drive protrusion 2321 abuts and engages with the abutment surface) extends in an arc shape, thereby improving the smoothness of the drive engagement process between the drive segment 232 and the first clamping member 22 and avoiding problems such as jamming.

[0063] like Figure 10 As shown, in some embodiments of this application, there are multiple first clamping members 22. The multiple first clamping members 22 are evenly spaced along the circumferential direction of the base 216 on the radial outer side of the drive section 232. This allows the multiple first clamping members 22 to clamp and cooperate with the wire harness motherboard 1, thereby improving the uniform force distribution in the area where the wire harness motherboard 1 cooperates with the first clamping members 22 and preventing the wire harness motherboard 1 from being damaged due to excessive local stress.

[0064] It should be noted that when the clamping assembly 2 is provided with multiple first clamping members 22, the second clamping member 23 is also provided with multiple driving protrusions 2321. Each driving protrusion 2321 is provided with one first clamping member 22 to ensure the driving effect of multiple first clamping members 22. The number of first clamping members 22 can be two, three, four, etc., and is not specifically limited here.

[0065] Reference Figure 10 In one specific embodiment of this application, the clamping assembly 2 includes two first clamping members 22, which are respectively disposed on both sides of the driving section 232. Correspondingly, the driving section 232 is also provided with two driving protrusions 2321. When the second clamping member 23 rotates relative to the housing 21 to a certain angle, the two driving protrusions 2321 can respectively drive and cooperate with the two first clamping members 22 to synchronously drive the two first clamping members 22 to move.

[0066] like Figure 9 As shown, in some embodiments of this application, the housing 21 is provided with a contact surface 214, and the first clamping member 22 is provided with a mating surface 221, and the contact surface 214 can abut and engage with the mating surface 221.

[0067] The contact surface 214 is adapted to drive the first clamping member 22 to move closer to the wire harness mainboard 1 relative to the housing 21 when it extends outward in the radial direction along the first axis. In other words, the position of the first clamping member 22 in the direction of the first axis can be adjusted by the contact surface 214 abutting against the mating surface 221, so that the first clamping member 22 can move closer to the second clamping member 23, shortening the distance between the first clamping surface 222 of the first clamping member 22 and the second clamping surface 2312 of the second clamping member 23. Thus, the first clamping member 22 and the second clamping member 23 cooperate to apply a clamping force in the direction of the first axis to the electrode and the wire harness mainboard 1, which facilitates the bonding arrangement of the electrode with the electrode and the electrode with the wire harness mainboard 1.

[0068] It is understandable that the contact surface 214 and the mating surface 221 are configured to move toward the wire harness motherboard 1 as the first clamping member 22 extends outward toward the mounting cavity 211, so as to apply a driving force toward the electrode side to the wire harness motherboard 1, thereby improving the clamping effect of the clamping assembly 2 on the electrode and the wire harness motherboard 1.

[0069] Reference Figure 9 In a further embodiment of this application, the mating surface 221 is provided on the side of the first clamping member 22 opposite to the direction of the first axis and the main board 1, and the inclination angle of the contact surface 214 relative to the first axis is smaller than the inclination angle of the mating surface 221 relative to the first axis.

[0070] The contact surface 214 is located on the side of the first clamping member 22 facing away from the PCB board. When the first clamping member 22 moves outward in the radial direction along the first axis, the contact surface 214 abuts against the mating surface 221. Driven by the contact surface 214, the first clamping member 22 moves relative to the housing 21 towards the side closer to the wire harness motherboard 1, thereby improving the clamping effect of the first clamping member 22 and the second clamping member 23 on the electrode and the wire harness motherboard 1.

[0071] It is understandable that, since the angle between the mating surface 221 and the first axis is smaller than the angle between the contact surface 214 and the first axis, when the mating surface 221 moves outward relative to the contact surface 214 in the radial direction of the first axis, the contact surface 214 can drive the first clamping member 22 to move relative to the housing 21 toward the wire harness motherboard 1.

[0072] like Figure 7 As shown, in some embodiments of this application, the housing 21 is provided with a guide groove 213 that extends radially along the first axis, and the guide groove 213 can guide and cooperate with the first clamping member 22 in the direction of the first axis to improve the stability of the first clamping member 22 moving relative to the housing 21 in the direction of the first axis and prevent the first clamping member 22 from shaking.

[0073] Combination Figure 7 and Figure 9 As shown, in some embodiments of this application, the housing 21 includes a housing body 215 and a base 216, the housing body 215 and the base 216 are connected and fitted together to form a mounting cavity 211.

[0074] Reference Figure 7 The base 216 is provided with a relief groove 217 that extends radially along the first axis. The relief groove 217 is adapted to avoid the first clamping member 22 so that the first clamping member 22 can extend out of the mounting cavity 211. A guide groove 213 is formed on the shell body 215, preferably located at the end of the shell body 215 that contacts the base 216. The guide groove 213 is connected to the relief groove 217 so that the first clamping member 22 extending from the relief groove 217 can be guided and engaged with the guide groove 213, that is, part of the first clamping member 22 is embedded in the guide groove 213.

[0075] Combination Figure 9 and Figure 10 As shown, it can be understood that the first clamping member 22 in this application has two modes of movement relative to the housing 21. One mode is that the first clamping member 22 is driven to extend outward in the radial direction of the first axis by the second clamping member 23. The other mode is that after the first clamping member 22 extends to a certain position, it engages with the contact surface 214 through the mating surface 221, so that the first clamping member 22 can move towards the wire harness motherboard 1 in the direction of the first axis while extending outward in the radial direction of the first axis.

[0076] The shell body 215 and the base 216 are arranged along the direction of the first axis, and the shell body 215 and the base 216 are fixedly connected, such as by snap-fit. Of course, the shell body 215 and the base 216 can be integrally formed, and the specific way the shell body 215 and the base 216 are matched is not limited here.

[0077] like Figure 5 As shown, in some embodiments of this application, the main board 1 of the wiring harness is provided with a through hole 12 that extends along the direction of the first axis. The through hole 12 is used for the tab 201 to pass through and be bent to be fixedly connected to the busbar 101, thereby facilitating the mating of the battery cell 20 with the integrated busbar 10 and facilitating the fitting of the tab 201 of the battery cell 20 to the busbar 101, so that the tab 201 can fully contact the electrical connector 11.

[0078] Combination Figure 1 and Figure 5 As shown, in the battery module 100, the battery cell 20 can be arranged below the wiring harness main board 1, and the tab 201 passes through the through hole 12 and is bent towards the busbar 101, so that the tab 201 of the battery cell 20 and the electrical connector 11 are stacked, which makes it easy to clamp and fix the stacked tab 201 and the wiring harness main board 1 by the clamping assembly 2, and then electrically connect the tab 201 to the wiring harness main board 1.

[0079] like Figure 5 As shown, in some embodiments of this application, there are multiple sets of clamping components 2, and at least one set of clamping components 2 is provided at each bus 101, so as to clamp and fix the tab 201 and the wire harness motherboard 1 by at least one set of clamping components 2, thereby improving the clamping and cooperation effect between the tab 201 and the wire harness motherboard 1.

[0080] Reference Figure 5 Each busbar 101 may be provided with multiple sets of clamping components 2 to clamp and engage the tabs 201 and electrical connectors 11 in the same group. It can be understood that when each set of tabs 201 and electrical connectors 11 are clamped and engaged by multiple sets of clamping components 2, the gap between tabs 201 and between tabs 201 and electrical connectors 11 can be better controlled, preventing problems such as tabs 201 warping.

[0081] Referring to Figure 5, two sets of clamping components 2 are arranged at each busbar 101. The two sets of clamping components 2 are arranged at intervals along the length of the busbar 101. The welding positions between the tabs 201 and the electrical connector 11 are located in the middle area of ​​the two sets of clamping components 2.

[0082] In some embodiments of this application, the clamping assembly 2 further includes a reset member (not shown in the figure). The reset member is disposed in the mounting cavity 211 and elastically connected between the first clamping member 22 and the housing 21 (e.g., the wall of the mounting cavity 211). The reset member is adapted to drive the first clamping member 22 to reset when the second clamping member 23 is rotated to the second position, so as to keep the first clamping member 22 in a non-clamping position by means of the reset member.

[0083] It is understood that the first clamping member 22 can be driven to extend from the mounting cavity 211 by the second clamping member 23, and the wire harness motherboard 1, the tab 201 and the electrical connector 11 can be clamped by the first clamping member 22 and the second clamping member 23 to facilitate the welding operation. After the welding is completed, the first clamping member 22 in the clamping assembly 2 can be reset under the drive of the reset member, and the second clamping member 23 can be rotated to the position corresponding to the through hole 12 to release the clamping state of the clamping assembly 2 (i.e. the second state mentioned above) and restore it to the first state. Thus, the clamping assembly 2 can be removed from the wire harness motherboard 1, which can improve the volumetric energy density of the battery module 100 without occupying the mass and space of the battery module 100.

[0084] In summary, the integrated busbar 10 according to the embodiments of this application has at least the following advantages over the prior art:

[0085] (1) A clamping component 2 is provided on the main board 1 of the wire harness. The first clamping component 22 and the second clamping component 23 are adjusted to a position suitable for clamping the tab 201 and the main board 1 of the wire harness by means of rotation drive, thereby ensuring the fit gap between the tab 201 and the tab 201, and between the tab 201 and the main board 1 of the wire harness, thereby ensuring the welding quality at the tab 201, improving the welding yield and welding cycle time.

[0086] (2) During the process of driving the first clamping member 22 to move by the second clamping member 23, the distance between the first clamping surface 222 and the second clamping surface 2312 is adjustable, so that the first clamping member 22 can apply a pressing force to the wire harness motherboard 1 towards the tab 201 side, thereby improving the clamping effect of the first clamping member 22 and the second clamping member 23 on the tab 201 and the wire harness motherboard 1.

[0087] According to an embodiment of this application, the battery module 100 includes the aforementioned integrated busbar 10 and a plurality of battery cells 20. The integrated busbar 10 is connected to the plurality of battery cells 20 respectively, so that the plurality of battery cells 20 can be connected in series according to connection requirements.

[0088] It should be noted that each busbar 101 can be arranged corresponding to one or two tabs 201 of the battery cell 20. When the busbar 101 is connected to only one tab 201 of the battery cell 20, one tab 201 is stacked on the electrical connector 11, and the tab 201 is stacked on the electrical connector 11 and clamped and fixed by the clamping assembly 2. When the busbar 101 is connected to two tabs 201 of the battery cells 20, the two tabs 201 of the two battery cells 20 are stacked on the busbar 101 in sequence and clamped and fixed by the clamping assembly 2. The two tabs 201 of the two battery cells 20 stacked on the busbar 101 have different polarities, that is, one is a positive tab and the other is a negative tab.

[0089] Combination Figures 1-10 Describe the connection and engagement process between the integrated busbar 10 and the battery cell 20 according to an embodiment of this application:

[0090] First, the tab 201 of the battery cell 20 is inserted through the through hole 12, and the tab 201 is bent toward the busbar 101 corresponding to it, so that the tab 201 is stacked and arranged at the busbar 101 of the wire harness main board 1. During the process of bending the tab 201 to cooperate with the electrical connector 11, the clamping component 2 arranged on the wire harness main board 1 can pass through the clearance hole of the tab 201.

[0091] Secondly, by driving the second clamping member 23 to rotate, the first clamping member 22 is driven to move, so that the first clamping member 22 extends outward from the mounting cavity 211 and moves further relative to the housing 21 toward the wire harness motherboard 1, so that the first clamping member 22 and the second clamping member 23 cooperate to clamp the tab 201 and the wire harness motherboard 1, thereby realizing the adjustment of the gap between the tabs 201 and the tabs 201, and between the tabs 201 and the wire harness motherboard 1.

[0092] Finally, the tabs 201 at the busbar 101 can be welded using welding equipment.

[0093] This ensures the fit clearance between tabs 201 and between tabs 201 and the main board 1 of the wiring harness, thereby ensuring the welding quality at tabs 201 and improving the welding yield and welding cycle time.

[0094] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0095] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0096] In the description of this application, "multiple" means two or more.

[0097] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0098] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0099] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0100] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An integrated busbar, characterized in that, include: The wiring harness main board (1) and the clamping assembly (2) include: a housing (21), a first clamping member (22) and a second clamping member (23); The housing (21) extends along the direction of the first axis and passes through the wire harness mainboard (1), and the housing (21) has a hollow mounting cavity (211); The first clamping member (22) is disposed in the mounting cavity (211), and the first clamping member (22) can extend outside the mounting cavity (211) and is located at a first position on one side of the wire harness motherboard (1); The second clamping member (23) is rotatably mounted on the housing (21) about the first axis. The second clamping member (23) has at least a portion disposed outside the mounting cavity (211) and located at a second position on the other side of the wire harness motherboard (1). One end of the second clamping member (23) along the direction of the first axis is shaped to drive the first clamping member (22). The first clamping member (22) extends from the housing (21) to the first position in the radial direction of the first axis. In the first state, the clamping assembly (2) has the first clamping member (22) located in the mounting cavity (211); in the second state, at least a portion of the first clamping member (22) extends out of the mounting cavity (211) and can cooperate with the second clamping member (23) to perform a clamping function.

2. The integrated busbar according to claim 1, characterized in that, The main board (1) of the wiring harness is provided with a plurality of busbars (101) spaced apart. Each busbar (101) includes an electrical connector (11) for electrical connection with the tab (201) of the battery cell (20).

3. The integrated busbar according to claim 2, characterized in that, The second clamping member (23) includes: The clamping section (231) is partially provided to protrude from the outer peripheral wall of the housing (21) in the radial direction along the first axis; A drive segment (232) is used to drive the first clamping member (22) to extend radially along the first axis; A connecting shaft (233) connects the clamping section (231) and the driving section (232) along the direction of the first axis.

4. The integrated busbar according to claim 3, characterized in that, The housing (21) is provided with a shaft hole (212) arranged along the first axis, and the connecting shaft (233) passes through the shaft hole (212) and rotates with the shaft hole (212).

5. The integrated busbar according to claim 3, characterized in that, The first clamping member (22) forms an abutment surface on the side of the drive segment (232) in the radial direction of the first axis. The abutment surface is used to abut against the drive segment (232). The drive segment (232) has a drive protrusion (2321) that protrudes in the radial direction of the first axis. The drive protrusion (2321) is adapted to abut against the abutment surface and drive the first clamping member (22) to extend out of the housing (21) in the radial direction of the first axis.

6. The integrated busbar according to claim 1, characterized in that, The housing (21) has a contact surface (214), and the first clamping member (22) has a mating surface (221). The contact surface (214) can abut against the mating surface (221). The contact surface (214) is adapted to drive the first clamping member (22) to move toward the wire harness motherboard (1) relative to the housing (21) when it extends outward in the radial direction along the first axis.

7. The integrated busbar according to claim 6, characterized in that, The mating surface (221) is located on the side of the first clamping member (22) facing away from the main cable (1) in the direction of the first axis, and the inclination angle of the contact surface (214) relative to the first axis is smaller than the inclination angle of the mating surface (221) relative to the first axis.

8. The integrated busbar according to claim 6, characterized in that, The housing (21) is provided with a guide groove (213) that extends radially along the first axis. The guide groove (213) can guide and cooperate with the first clamping member (22) in the direction of the first axis.

9. The integrated busbar according to claim 2, characterized in that, The main board of the wiring harness (1) is provided with a through hole (12) that runs through the first axis. The through hole (12) is used for the tab (201) to pass through and bend to be fixedly connected to the busbar (101).

10. The integrated busbar according to claim 2, characterized in that, The clamping components (2) are in multiple sets, and at least one set of the clamping components (2) is provided at the busbar (101).

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