Busbar, cell connecting assembly, battery pack and vehicle

Abstract

This disclosure relates to a busbar, a cell connection assembly, a battery pack, and a vehicle. The busbar includes a busbar body and a plurality of protrusions. The busbar body is used for electrical connection with a cell. The plurality of protrusions are arranged in at least a portion of the outer peripheral edge of the busbar body and protrude from the busbar body. Adjacent protrusions are spaced apart to form a protrusion gap. By providing a plurality of protrusions in at least a portion of the outer peripheral edge of the busbar body, the heat dissipation area of ​​the busbar can be increased, thereby improving the heat dissipation capacity of the busbar. Furthermore, the spaced arrangement between adjacent protrusions increases the contact area between the protrusions and the air, further enhancing the heat dissipation capacity of the busbar.

Description

Technical Field

[0001] This disclosure relates to the field of battery pack technology, specifically to a busbar, a cell connection assembly, a battery pack, and a vehicle. Background Technology

[0002] In power batteries, the CCS (Cell Connect System) is generally used for high-voltage connection of cells and sampling of cell voltage and temperature. As the requirements for the performance of power batteries, such as fast charging and output power, become increasingly stringent, the current of the battery pack is also increasing, which places higher demands on the current-carrying area and heat dissipation capacity of the busbars in the cell connect system.

[0003] In related technologies, due to space limitations, the current-carrying area of ​​the busbar cannot be increased indefinitely. When encountering high current conditions, the busbar has poor heat dissipation capacity, which increases the risk of thermal runaway of the battery pack. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this disclosure provides a bus, a cell connection assembly, a battery pack, and a vehicle.

[0005] According to a first aspect of the present disclosure, a busbar is provided, the busbar including a busbar body and a plurality of protrusions, the busbar body being used for electrical connection with a battery cell;

[0006] The plurality of protrusions are arranged on at least a portion of the outer peripheral edge of the busbar body and protrude from the busbar body.

[0007] The two adjacent protrusions are spaced apart to form a protrusion gap.

[0008] Specifically, by providing multiple protrusions in at least a portion of the outer periphery of the busbar body, the heat dissipation area of ​​the busbar can be increased, thereby improving its heat dissipation capacity. Secondly, the spacing between adjacent protrusions increases the contact area between the protrusions and the air, further enhancing the busbar's heat dissipation capacity. Furthermore, for the overall structure of the busbar, the multiple protrusions also provide support and improve its rigidity and bending resistance.

[0009] In some embodiments, the bus body includes a first body surface and a second body surface disposed opposite to each other in its thickness direction;

[0010] A portion of the first body surface is used for bonding and electrical connection with the battery cell;

[0011] The plurality of protrusions are arranged on at least a portion of the outer peripheral edge of the second body surface and protrude in a direction away from the second body surface.

[0012] The first surface of the busbar body is attached to and electrically connected to the battery cell to achieve electrical connection between the busbar and the battery cell. The protrusion is arranged on one side of the second surface of the busbar body opposite to the first surface of the busbar body to avoid structural interference to the electrical connection between the busbar and the battery cell.

[0013] In some embodiments, the plurality of protrusions are arranged to protrude along the thickness direction of the busbar body.

[0014] The design incorporates elements along the thickness of the busbar body to ensure structural strength between the protrusion and the busbar body.

[0015] In some embodiments, the plurality of protrusions protrude from the second body surface along the thickness direction of the busbar body and are of the same size.

[0016] The uniform height of the protrusions ensures consistent support, promoting even pressure distribution during installation and use, reducing localized stress concentration, and enhancing structural stability and durability. It also prevents localized bending or deformation caused by inconsistent protrusion heights, improving the busbar's resistance to mechanical impacts or vibrations. Furthermore, consistent protrusion heights result in more uniform gaps between protrusions, facilitating a more regular airflow path. Finally, protrusions of the same height help dissipate heat more evenly from the busbar body, improving heat dissipation and extending the busbar's lifespan.

[0017] In some embodiments, the busbar further includes a plurality of first insulating layers, a second insulating layer, and a third insulating layer;

[0018] The first insulating layer is arranged corresponding to the protrusion, and the first insulating layer is arranged on the outer surface of the protrusion;

[0019] The first body surface includes a first electrical connection region and a first non-electrical connection region, and the second insulating layer is disposed in the first electrical connection region;

[0020] The second body surface includes a second electrically connected region and a second non-electrically connected region, and the third insulating layer is disposed in the second electrically connected region.

[0021] By installing an insulating layer in the non-electrical connection area, it can be ensured that the busbar remains insulated from other structural components within the battery pack.

[0022] In some embodiments, the busbar includes two first outer edges disposed opposite to each other in a first direction and two second outer edges disposed opposite to each other in a second direction;

[0023] The plurality of protrusions includes at least two first protrusions and at least two second protrusions;

[0024] Each of the first outer edges is provided with at least one first protrusion, and each of the second outer edges is provided with at least one second protrusion;

[0025] The first direction and the second direction are intersecting.

[0026] The busbar body includes two first outer edges arranged opposite each other in a first direction and two second outer edges arranged opposite each other in a second direction. All four outer edges are provided with protrusions, which further increases the heat exchange area of ​​the busbar and enhances the heat dissipation capacity of the busbar.

[0027] In some embodiments, the busbars are arranged symmetrically in the first direction; and / or, the busbars are arranged symmetrically in the second direction.

[0028] By setting the busbar to a symmetrical structure, the force can be evenly distributed when the busbar is subjected to external forces, reducing local deformation or stress concentration caused by asymmetrical loads and improving the structural strength of the busbar.

[0029] According to a second aspect of the present disclosure, a battery cell connection assembly is also provided, the battery cell connection assembly including a support structure and a plurality of the aforementioned busbars; the busbars are disposed on the support structure.

[0030] In some embodiments, the cell connection assembly further includes at least one flexible electrical connector;

[0031] The flexible electrical connector is disposed on the supporting structure, and the flexible electrical connector is capable of electrically connecting two adjacent busbars.

[0032] The flexible electrical connector has a certain deformation capacity, which can effectively adapt to positional deviations between busbars caused by manufacturing errors or installation offsets, thus improving the fault tolerance during assembly. In addition, this flexible electrical connector can embed temperature sensing elements, thereby enabling cell monitoring and enhancing safety performance.

[0033] In some embodiments, the flexible electrical connector includes a flexible body and at least one sampling group;

[0034] The sampling group includes two sampling units, which are electrically connected to both sides of the flexible body and are arranged corresponding to two adjacent busbars.

[0035] The protrusion gap of each of the busbars includes at least one first protrusion gap and at least one second protrusion gap, and the width of the first protrusion gap is greater than the width of the second protrusion gap;

[0036] The sampling section passes through the first protruding gap corresponding to the busbar to be electrically connected to the busbar body.

[0037] The two sampling sections of the sample group facilitate electrical connection to two adjacent busbars for sampling. Each sampling section can be a sampling nickel sheet, which can be soldered to the busbar body for electrical connection. The area of ​​the busbar body used for electrical connection with the sampling nickel sheet may not have the aforementioned insulating layer to facilitate this connection. Furthermore, by making the width of the first protrusion gap greater than the width of the second protrusion gap, it is easier to avoid obstructing the sampling section.

[0038] In some embodiments, each busbar is provided with two first protruding gaps, the two first protruding gaps are provided on opposite sides of the busbar body, and the two first protruding gaps are arranged opposite to each other.

[0039] Each busbar can have a first protruding gap on both opposite sides of its edge, which facilitates electrical connection between the opposite sides of the busbar and the sampling unit, thus improving the ease of connection.

[0040] In some embodiments, the flexible electrical connector further includes a connector electrically connected to one end of the flexible body.

[0041] By setting up this connector, the information collected by the sampling unit can be sent to the cell management unit, thereby enabling the collection of information such as cell voltage or temperature.

[0042] In some embodiments, the supporting structure has a plurality of welding hole groups, which correspond to and are disposed opposite to the busbar;

[0043] The welding hole group includes two welding holes, one of which is configured to be opposite to the terminal of one of two adjacent battery cells, and the other welding hole is configured to be opposite to the terminal of the other of the two adjacent battery cells; and the welding hole is configured to be opposite to the electrical connection area of ​​the busbar.

[0044] In this design, by setting welding holes in the supporting structure, the terminals of the battery cell can be electrically connected to the busbar through the welding holes, thereby avoiding the need for welding the terminals of the battery cell.

[0045] In some embodiments, the supporting structure further forms a plurality of explosion-proof openings, which are configured to correspond to the battery cells and are positioned opposite to the explosion-proof valves of the corresponding battery cells; wherein the explosion-proof openings are staggered from the busbars.

[0046] By setting an explosion-proof opening on the load-bearing structure and positioning the explosion-proof opening opposite to the explosion-proof valve of the corresponding battery cell, the explosion-proof valve can be avoided. This ensures that when the battery cell experiences thermal runaway or other situations, the explosion-proof valve will not be obstructed externally, thus ensuring smooth valve release and reducing the risk of thermal propagation.

[0047] According to a third aspect of the present disclosure, a battery pack is also provided, the battery pack including at least one cell module, the cell module including the cell connection assembly and a plurality of cells; the cell connection assembly is disposed on the side of the cell where the terminal post is disposed.

[0048] In some embodiments, the battery module includes a plurality of first battery cell groups, the plurality of first battery cell groups being arranged in a first direction, and the first battery cell groups including a plurality of first battery cells arranged sequentially in a second direction;

[0049] The busbar includes an inter-cell busbar, which is used to electrically connect two first cells arranged adjacent to each other in the first direction;

[0050] The first direction and the second direction are intersecting, and the second direction is the thickness direction of the first cell.

[0051] In this arrangement, the first cells are arranged in the second direction, allowing the entire cell module to integrate more cells within a limited space. This layout helps to improve the energy density of the battery pack. However, this disclosure does not limit the specific arrangement of the cells. Furthermore, by providing inter-cell busbars, it is easy to achieve electrical connection between two adjacent first cells.

[0052] In some embodiments, the bus further includes a bridging bus for electrically connecting two first cells arranged adjacent to each other in the second direction.

[0053] The bridging bus can electrically connect the first battery cell in the second direction, improving the flexibility of the electrical connection between the bus and the battery cell.

[0054] In some embodiments, the busbar further includes a connecting busbar, and the battery cell module is provided with at least one connecting busbar, with two adjacent battery cell modules electrically connected through the connecting busbar.

[0055] In this configuration, two adjacent battery cell modules are electrically connected via a connecting bus, thereby enabling electrical connection between the busbars of the battery cell modules.

[0056] In some embodiments, the battery pack further includes a battery pack housing;

[0057] The side of the protrusion away from the busbar body abuts against the inner wall of the battery pack housing; or, a gap is left between the side of the protrusion away from the busbar body and the inner wall of the battery pack housing.

[0058] By setting multiple protrusions on the busbar, these protrusions can effectively support the bottom protective plate of the battery pack casing, thereby improving the bottom protective plate's resistance to bottom ball impacts and preventing bottom ball impacts from damaging the battery cell's terminals, the battery cell's explosion-proof valve, etc., thus improving the battery pack's safety performance.

[0059] In some embodiments, the battery pack housing includes a bottom protective plate, and the side of the protrusion away from the busbar body abuts against the inner wall of the bottom protective plate; or, a gap is left between the side of the protrusion away from the busbar body and the inner wall of the bottom protective plate.

[0060] By setting multiple protrusions on the busbar, these protrusions can effectively support the bottom protective plate of the battery pack casing, thereby improving the bottom protective plate's resistance to bottom ball impacts and preventing bottom ball impacts from damaging the battery cell's terminals, the battery cell's explosion-proof valve, etc., thus improving the battery pack's safety performance.

[0061] In some embodiments, the battery pack further includes a filler adhesive; the plurality of protrusions and the busbar body enclose an open cavity, the filler adhesive is filled in the open cavity, and the side of the filler adhesive away from the busbar body is flush with the side of the protrusion away from the busbar body.

[0062] By aligning the side of the filler away from the busbar body with the side of the protrusion away from the busbar body, that is, by keeping the thickness of the filler and the height of the protrusion consistent, the gap between the busbar and the bottom protection plate of the battery pack can be better filled, thereby providing further support to the bottom protection plate and further improving the battery pack's resistance to bottom ball impacts.

[0063] According to a fourth aspect of the present disclosure, a vehicle is also provided, the vehicle including the battery pack.

[0064] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: By providing multiple protrusions in at least a portion of the outer peripheral edge of the bus body, the multiple protrusions can increase the heat dissipation area of ​​the bus and improve its heat dissipation capacity. Secondly, the spacing between adjacent protrusions can increase the contact area between the protrusions and the air, thereby improving the heat dissipation capacity of the bus. In addition, for the overall structure of the bus, providing multiple protrusions can also provide support for the bus and improve its rigidity and bending resistance.

[0065] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0066] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0067] Figure 1 This is an exploded view of a portion of the structure of a battery pack according to one embodiment of the present disclosure.

[0068] Figure 2 This is a partial structural schematic diagram of a battery pack according to one embodiment of the present disclosure.

[0069] Figure 3 yes Figure 2 A magnified view of a section at point H.

[0070] Figure 4 This is a schematic diagram of the structure of the inter-cell busbar of a cell connection assembly according to one embodiment of the present disclosure.

[0071] Figure 5 This is a schematic diagram of the bridging bus of a cell connection assembly according to one embodiment of the present disclosure.

[0072] Figure 6 This is a schematic diagram of the connection busbar structure of a cell connection assembly according to one embodiment of the present disclosure.

[0073] Explanation of reference numerals in the attached figures

[0074] 1. Busbar; 10. Open cavity; 11. Busbar body; 112. Second body surface; 1121. Second electrical connection area; 1122. Second non-electrical connection area; 12. Protrusion; 121. First protrusion; 122. Second protrusion; 120. Protrusion gap; 1201. First protrusion gap; 1202. Second protrusion gap; 13. First outer edge; 14. Second outer edge; 1001. Inter-cell busbar; 1002. Bridging busbar; 1003. Connecting busbar;

[0075] 2. Load-bearing structure; 21. Welded hole group; 211. Welded hole; 22. Explosion-proof opening;

[0076] 3. Flexible electrical connector; 31. Flexible connector body; 32. Sampling assembly; 321. Sampling unit; 33. Connector;

[0077] 20. Battery cell; 201. Terminal post; 202. Explosion-proof valve;

[0078] 200, Battery cell module; 2001, First battery cell group; 2002, First battery cell;

[0079] 300. Cell connection assembly;

[0080] A. First direction; B. Second direction. Detailed Implementation

[0081] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0082] In this disclosure, unless otherwise stated, the directional terms "first direction" and "second direction" refer to two intersecting directions, as detailed in the following references. Figure 1 As shown. The directional terms used, such as "inner" and "outer", refer to the inner and outer parts of the specific structural outline; the terms used, such as "first" and "second", are only used to distinguish one element from another and do not have any sequential or important meaning.

[0083] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0084] Reference Figures 1 to 6 As shown, this disclosure provides a busbar 1, which includes a busbar body 11 and a plurality of protrusions 12. The busbar body 11 is used for electrical connection with a battery cell 20. The plurality of protrusions 12 are arranged in at least a portion of the outer peripheral edge of the busbar body 11 and protrude from the busbar body 11. The protrusions 12 are spaced apart to form a protrusion gap 120.

[0085] In the above technical solution, by providing multiple protrusions 12 in at least a portion of the outer peripheral edge of the busbar body 11, the multiple protrusions 12 can increase the heat dissipation area of ​​the busbar 1 and improve its heat dissipation capacity. Secondly, the spacing between adjacent protrusions 12 increases the contact area between the protrusions 12 and the air, thereby improving the heat dissipation capacity of the busbar 1. Furthermore, for the overall structure of the busbar 1, providing multiple protrusions 12 also provides support for the busbar 1 and improves its rigidity and bending resistance.

[0086] The arrangement area of ​​the multiple protrusions 12 can be a part of the outer periphery of the busbar body 1 or the entire outer periphery of the busbar body 1. This disclosure does not limit this.

[0087] In one implementation, reference Figures 4 to 6 As shown, the bus body 11 includes a first body surface and a second body surface 112 disposed opposite to each other in its thickness direction; a portion of the first body surface is used to attach to and electrically connect with the battery cell 20; a plurality of protrusions 12 are arranged in at least a portion of the outer peripheral edge of the second body surface 112 and protrude in a direction away from the second body surface 112.

[0088] In this embodiment, the first surface of the bus body 11 is attached to and electrically connected to the battery cell 20 to realize the electrical connection between the bus 1 and the battery cell 20. The protrusion 12 is arranged on one side of the second surface 112 opposite to the first surface to avoid structural interference to the electrical connection between the bus 1 and the battery cell 20.

[0089] Regarding the extension direction of the protrusion 12, this disclosure does not limit it. For example, the protrusion 12 may extend obliquely relative to the second body surface 112; or, the protrusion 12 may extend perpendicularly relative to the second body surface 112, that is, the protrusion 12 protrudes along the thickness direction of the busbar body 11 to ensure the structural strength between the protrusion 12 and the busbar body 11. For example, the busbar body 11 and the plurality of protrusions 12 may be integrally formed.

[0090] Optionally, refer to Figures 4 to 6 As shown, multiple protrusions 12 protrude from the second body surface 112 along the thickness direction of the busbar body 11, and their dimensions can be the same.

[0091] In this embodiment, the protrusions 12 of the same height ensure that each protrusion 12 provides consistent support, which helps to achieve uniform pressure distribution during installation and use, reduces local stress concentration, and enhances the stability and durability of the structure. It also avoids local bending or deformation caused by inconsistent protrusion heights of the protrusions 12, improving the busbar 1's resistance to deformation when facing mechanical impacts or vibrations.

[0092] Secondly, having uniform height dimensions for the protrusions 12 allows for relatively uniform gaps 120 between them, which helps to create a relatively regular airflow path. Additionally, protrusions 12 of the same height dimension help to more evenly distribute heat from the busbar body 11, improving heat dissipation and extending the service life of the busbar 1.

[0093] Furthermore, this disclosure does not limit the height, width, and length dimensions of the protrusion 12, which can be set according to requirements; similarly, this disclosure does not limit the spacing dimensions of the protrusion gap 120, which can be set according to requirements.

[0094] In another embodiment, the busbar 1 further includes a plurality of first insulating layers (not shown), second insulating layers (not shown), and third insulating layers (not shown); the first insulating layers are arranged corresponding to the protrusions 12 and are disposed on the outer surface of the protrusions 12; the first body surface includes a first electrical connection area and a first non-electrical connection area, and the second insulating layer is disposed on the first electrical connection area; the second body surface 112 includes a second electrical connection area 1121 and a second non-electrical connection area 1122, and the third insulating layer is disposed on the second electrical connection area 1121.

[0095] In this embodiment, by providing an insulating layer in the non-electrical connection area, it can be ensured that the busbar 1 remains insulated from other structural components within the battery pack. For example, insulation treatment can be performed in the non-electrical connection area by epoxy spraying or by pasting PI (polyimide) or PET (polyethylene terephthalate) films, but this disclosure does not limit the specific insulation method.

[0096] In one embodiment, reference is made to... Figure 4 and Figure 5 As shown, the busbar body 11 includes two first outer edges 13 arranged opposite to each other in a first direction A and two second outer edges 14 arranged opposite to each other in a second direction; the plurality of protrusions 12 include at least two first protrusions 121 and at least two second protrusions 122; each first outer edge 13 is provided with at least one first protrusion 121, and each second outer edge 14 is provided with at least one second protrusion 122; wherein, the first direction A and the second direction B are intersected.

[0097] In this embodiment, the bus body 11 includes two first outer edges 13 arranged opposite to each other in the first direction A, and two second outer edges 14 arranged opposite to each other in the second direction B. All four outer edges are provided with protrusions 12, which further increases the heat exchange area of ​​the bus 1 and improves the heat dissipation capacity of the bus 1.

[0098] However, this disclosure does not limit the specific shape of the bus body 11. For example, the bus body 11 can also be constructed in a circular state, and multiple protrusions 12 can be arranged in pairs around the outer edge of the circular bus body 11.

[0099] In addition, the busbar 1 can be arranged symmetrically in the first direction A; and / or, the busbar 1 can be arranged symmetrically in the second direction B. By setting the busbar 1 as a symmetrical structure, when the busbar 1 is subjected to external forces, the forces can be evenly distributed, reducing local deformation or stress concentration caused by asymmetrical loads and improving the structural strength of the busbar 1.

[0100] Reference Figure 1 and Figure 2 As shown, this disclosure also provides a cell connection assembly 300, which includes a support structure 2 and a plurality of busbars 1 as described above; the busbars 1 are disposed on the support structure 2.

[0101] In the above technical solution, the supporting structure 2 provides an installation foundation for the busbar 1, ensuring the stability of the busbar 1 installation. By providing multiple protrusions 12 in at least a portion of the outer peripheral edge of the busbar body 11, these protrusions 12 can increase the heat dissipation area of ​​the busbar 1 and improve its heat dissipation capacity. This, in turn, improves the heat dissipation capacity of the cell connection assembly 300.

[0102] Secondly, the spacing between two adjacent protrusions 12 increases the contact area between the protrusions 12 and the air, thereby improving the heat dissipation capacity of the busbar 1, which in turn further improves the heat dissipation capacity of the cell connection assembly 300.

[0103] In addition, for the overall structure of busbar 1, by setting multiple protrusions 12, it can also provide support for busbar 1 and improve the rigidity and bending resistance of busbar 1, thereby improving the rigidity and bending resistance of battery cell connection assembly 300.

[0104] Optionally, refer to Figure 1 As shown, the cell connection assembly 300 also includes at least one flexible electrical connector 3; the flexible electrical connector 3 is disposed on the supporting structure 2, and the flexible electrical connector 3 can electrically connect two adjacent busbars 1, and thus can electrically connect all busbars 1, thereby enabling sampling of the cell voltage.

[0105] In this embodiment, the flexible electrical connector 3 has a certain deformation capability, which can effectively adapt to positional deviations between busbars 1 caused by manufacturing errors or installation offsets, thereby improving the fault tolerance during assembly. In addition, the flexible electrical connector 3 can embed a temperature sensing element, thereby enabling monitoring of the battery cell 20 and improving safety performance. The flexible electrical connector 3 can be an FPC (Flexible Printed Circuit) or an FFC (Flexible Flat Cable), and this disclosure does not limit the specific type of the flexible electrical connector 3.

[0106] The load-bearing structure 2 can adopt a blister tray design to fix the busbar 1 and the flexible electrical connector 3 together by hot riveting; it can also adopt a hot-pressed PET film design to fix the busbar 1 and the flexible electrical connector 3 together by hot pressing; or it can adopt a mica board design to fix the busbar 1 and the flexible electrical connector 3 together by double-sided adhesive or spot structural adhesive.

[0107] Reference Figures 2 to 4 As shown, the flexible electrical connector 3 includes a flexible body 31 and at least one sampling group 32; the sampling group 32 includes two sampling parts 321, which are electrically connected to both sides of the flexible body 31 and are arranged correspondingly to two adjacent busbars 1; the protrusion gap 120 of each busbar 1 includes at least one first protrusion gap 1201 and at least one second protrusion gap 1202, and the width of the first protrusion gap 1201 is greater than the width of the second protrusion gap 1202; the sampling part 321 passes through the first protrusion gap 1201 of the corresponding busbar 1 to be electrically connected to the busbar body 11.

[0108] In this embodiment, the two sampling sections 321 of the sampling group 32 facilitate electrical connection between two adjacent busbars 1 to achieve sampling. The sampling section 321 can be a sampling nickel sheet, which can be soldered to the busbar body 11 to achieve electrical connection. The area of ​​the busbar body 11 used for electrical connection with the sampling nickel sheet may not have the aforementioned insulating layer to facilitate electrical connection. Furthermore, by making the width of the first protrusion gap 1201 greater than the width of the second protrusion gap 1202, it is convenient to avoid the sampling section 321. The gap size and location of the first protrusion gap 1201 can be set according to requirements, and this disclosure does not limit this.

[0109] Optionally, refer to Figures 4 to 6As shown, each busbar 1 is provided with two first protrusion gaps 1201. The two first protrusion gaps 1201 are provided on opposite sides of the busbar body 11 and are arranged opposite to each other.

[0110] That is, in this embodiment, each busbar 1 can be provided with a first protruding gap 1201 on both opposite sides of its side edge, so that both opposite sides of the busbar 1 can be electrically connected to the sampling unit 321, thereby improving the convenience of connection.

[0111] For example, the two first protruding gaps 1201 can be disposed on the two opposite sides of the busbar body 11 in the first direction A, and the two first protruding gaps 1201 are disposed opposite each other in the first direction A. Alternatively, the two first protruding gaps 1201 can be disposed on the two opposite sides of the busbar body 11 in the second direction B, and the two first protruding gaps 1201 are disposed opposite each other in the second direction B.

[0112] Optionally, refer to Figure 3 As shown, the flexible electrical connector 3 also includes a connector 33, which is electrically connected to one end of the flexible body 31.

[0113] In this embodiment, by setting the connector 33, the information collected by the sampling unit 321 can be sent to the CMU (Cell Management Unit) to realize the collection of information such as voltage or temperature of the battery cell 20. However, this disclosure does not limit the specific setting position of the connector 33.

[0114] Optionally, refer to Figure 1 As shown, the supporting structure 2 has a plurality of welding hole groups 21, which correspond to and are arranged opposite to the busbar 1. The welding hole group 21 includes two welding holes 211, one of which is arranged opposite to the pole post 201 of one of the two adjacent battery cells 20, and the other welding hole 211 is arranged opposite to the pole post 201 of the other of the two adjacent battery cells 20. The welding hole 211 is arranged opposite to the electrical connection area of ​​the busbar 1.

[0115] In this embodiment, by providing welding holes 211 on the supporting structure 2, the terminal 201 of the battery cell 20 can be electrically connected to the busbar 1 through the welding holes 211, thereby avoiding the terminal 201 of the battery cell 20.

[0116] Additionally, refer to Figure 1 As shown, the supporting structure 2 also has multiple explosion-proof openings 22, which are configured to correspond to the battery cell 20 and are positioned opposite to the explosion-proof valve 202 of the corresponding battery cell 20; wherein, the explosion-proof openings 22 are staggered from the busbar 1.

[0117] In this embodiment, by providing an explosion-proof opening 22 on the supporting structure 2, and setting the explosion-proof opening 22 opposite to the explosion-proof valve 202 of the corresponding battery cell 20, the explosion-proof valve 202 can be avoided, thereby ensuring that when the battery cell 20 experiences thermal runaway or other situations, the explosion-proof valve 202 is unobstructed externally, ensuring that the battery cell 20 can smoothly release the valve and reducing the risk of thermal spread.

[0118] Reference Figure 1 and Figure 2 As shown, this disclosure also provides a battery pack, which includes at least one cell module 200, the cell module 200 including the aforementioned cell connection assembly 300 and a plurality of cells 20; the cell connection assembly 300 is disposed on the side of the cell 20 where the terminal post 201 is disposed.

[0119] In the above technical solution, the battery cell module 200 can be configured as one or multiple, and this disclosure does not limit this. When multiple battery cell modules 200 are configured, each battery cell module 200 may include an independent battery cell connection assembly 300.

[0120] Optionally, refer to Figure 1 and Figure 2 As shown, the battery cell module 200 includes multiple first battery cell groups 2001, which are arranged in a first direction A. Each first battery cell group 2001 includes multiple first battery cells 2002 arranged sequentially in a second direction B. The busbar 1 includes an inter-cell busbar 1001, which is used to electrically connect two adjacent first battery cells 2002 arranged in the first direction A. The first direction A intersects with the second direction B, and the second direction B is the thickness direction of the first battery cell 2002.

[0121] In this embodiment, the first cell 2002 is arranged in the second direction B (i.e., the thickness direction of the first cell 2002), allowing the entire cell module 200 to integrate more cells 20 within a limited space. This layout helps to improve the energy density of the battery pack. However, this disclosure does not limit the specific arrangement of the cells 20. In addition, by providing the inter-cell bus 1001, it is convenient to realize the electrical connection between two adjacent first cells 2002.

[0122] In one implementation, reference Figure 1 , Figure 2 as well as Figure 5 As shown, bus 1 also includes a bridging bus 1002, which is used to electrically connect two first cells 2002 arranged adjacent to each other in the second direction B.

[0123] That is, in addition to the aforementioned inter-cell bus 1001, bus 1 may also include a bridging bus 1002, which can electrically connect the first cell 2002 in the second direction B, thereby improving the flexibility of the electrical connection between bus 1 and cell 20.

[0124] In another embodiment, refer to Figure 1 , Figure 2 as well as Figure 6 As shown, busbar 1 also includes connecting busbar 1003. Each cell module 200 is provided with at least one connecting busbar 1003. Two adjacent cell modules 200 are electrically connected through the connecting busbar 1003, thereby enabling electrical connection between the busbars 1 of the cell modules 200. For example, a cell module 200 may have two connecting busbars 1003. One part of the connecting busbar 1003 is electrically connected to the end cell 20, and the other part of the connecting busbar 1003 protrudes from the end cell 20, facilitating electrical connection between the connecting busbars 1003 through an intermediate electrical connection structure.

[0125] Optionally, the battery pack also includes a battery pack housing (not shown); the side of the protrusion 12 away from the busbar body 11 abuts against the inner wall of the battery pack housing. Alternatively, a gap is left between the side of the protrusion 12 away from the busbar body 11 and the inner wall of the battery pack housing.

[0126] In this embodiment, the multiple protrusions 12 can effectively support the battery pack housing, preventing damage to the terminals 201 and explosion-proof valve 202 of the battery cell 20 under external force, thus improving safety performance. A gap is left between the side of the protrusion 12 furthest from the busbar body 11 and the inner wall of the battery pack housing, facilitating installation and providing a certain installation tolerance.

[0127] For example, the battery pack housing may include a bottom cover plate, with the side of the protrusion 12 away from the busbar body 11 abutting against the inner wall of the bottom cover plate; or, a gap may be left between the side of the protrusion 12 away from the busbar body 11 and the inner wall of the bottom cover plate.

[0128] That is, by setting multiple protrusions 12 on the busbar 1, the multiple protrusions 12 can effectively support the bottom protective plate of the battery pack casing, thereby improving the bottom protective plate's ability to resist bottom ball impacts, preventing bottom ball impacts from damaging the terminal post 201 of the battery cell 20, the explosion-proof valve 202 of the battery cell, etc., and thus improving the safety performance of the battery pack.

[0129] Optionally, the battery pack may also include filler (not shown); a plurality of protrusions 12 and busbar body 11 surround an open cavity 10, the filler is filled in the open cavity 10, and the side of the filler away from the busbar body 11 is flush with the side of the protrusions 12 away from the busbar body 11.

[0130] In this embodiment, by making the side of the filler away from the busbar body 11 flush with the side of the protrusion 12 away from the busbar body 11, that is, the thickness of the filler and the height of the protrusion 12 are consistent, the gap between the busbar 1 and the bottom protection plate of the battery pack can be better filled, thereby further supporting the bottom protection plate and further improving the battery pack's ability to resist bottom ball impacts.

[0131] For example, the filler adhesive may also include expanding foam, with the side of the expanding foam away from the busbar body 11 abutting against the inner wall of the bottom cover plate; or, a gap may be left between the side of the expanding foam away from the busbar body 11 and the inner wall of the bottom cover plate. This expanding foam can better fill the gap between the busbar 1 and the battery pack bottom cover plate, providing better support for the bottom cover plate and further improving the battery pack's resistance to bottom ball impacts.

[0132] For example, the filler includes thermally conductive adhesive. The side of the thermally conductive adhesive away from the busbar body 11 abuts against the inner wall of the bottom guard plate. In this way, the thermally conductive adhesive can completely fill the space between the busbar 1 and the bottom guard plate. While improving the battery pack's resistance to bottom ball impacts, the thermally conductive adhesive can also transfer the heat of the busbar 1 to the bottom guard plate of the battery pack, and then dissipate the heat through the natural wind when the electric vehicle is in motion. This not only increases the battery pack's resistance to bottom ball impacts, but also further improves the heat dissipation capacity of the busbar 1 based on the heat dissipation of the protrusion 12 of the busbar 1.

[0133] This disclosure also provides a vehicle that includes the aforementioned battery pack.

[0134] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0135] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A busbar, characterized in that The busbar includes a busbar body and multiple protrusions, the busbar body being used for electrical connection with the battery cell; The plurality of protrusions are arranged on at least a portion of the outer peripheral edge of the busbar body and protrude from the busbar body. The two adjacent protrusions are spaced apart to form a protrusion gap.

2. The busbar of claim 1, wherein The bus body includes a first body surface and a second body surface disposed opposite to each other in its thickness direction; A portion of the first body surface is used for bonding and electrical connection with the battery cell; The plurality of protrusions are arranged on at least a portion of the outer peripheral edge of the second body surface and protrude in a direction away from the second body surface.

3. The busbar of claim 2, wherein, The plurality of protrusions are arranged to protrude along the thickness direction of the busbar body.

4. The busbar according to claim 3, characterized in that, The plurality of protrusions protrude from the surface of the second body along the thickness direction of the busbar body and are of the same size.

5. The busbar of claim 2, wherein, The bus also includes multiple first insulating layers, second insulating layers, and third insulating layers; The first insulating layer is arranged corresponding to the protrusion, and the first insulating layer is arranged on the outer surface of the protrusion; The first body surface includes a first electrical connection region and a first non-electrical connection region, and the second insulating layer is disposed in the first electrical connection region; The second body surface includes a second electrically connected region and a second non-electrically connected region, and the third insulating layer is disposed in the second electrically connected region.

6. The busbar of claim 1, wherein, The busbar body includes two first outer edges arranged opposite each other in a first direction and two second outer edges arranged opposite each other in a second direction; The plurality of protrusions includes at least two first protrusions and at least two second protrusions; Each of the first outer edges is provided with at least one first protrusion, and each of the second outer edges is provided with at least one second protrusion; The first direction and the second direction are intersecting.

7. The busbar of claim 6, wherein, The busbars are arranged symmetrically in the first direction; and / or, the busbars are arranged symmetrically in the second direction.

8. An electrical cell connection assembly, characterized by The cell connection assembly includes a support structure and a plurality of busbars as described in any one of claims 1-7; the busbars are disposed on the support structure.

9. The cell connection assembly of claim 8, wherein, The cell connection assembly further includes at least one flexible electrical connector; The flexible electrical connector is disposed on the supporting structure, and the flexible electrical connector is capable of electrically connecting two adjacent busbars.

10. The cell connection assembly of claim 9, wherein, The flexible electrical connector includes a flexible body and at least one sampling group; The sampling group includes two sampling units, which are electrically connected to both sides of the flexible body and are arranged corresponding to two adjacent busbars. The protrusion gap of each of the busbars includes at least one first protrusion gap and at least one second protrusion gap, and the width of the first protrusion gap is greater than the width of the second protrusion gap; The sampling section passes through the first protruding gap corresponding to the busbar to be electrically connected to the busbar body.

11. The cell connection assembly of claim 10, wherein, Each of the busbars is provided with two first protruding gaps, which are located on opposite sides of the busbar body and are positioned opposite each other.

12. The cell connection assembly of claim 10, wherein, The flexible electrical connector further includes a connector that is electrically connected to one end of the flexible component body.

13. The cell connection assembly of claim 8, wherein, The supporting structure has multiple groups of welding holes, which are corresponding to and opposite to the busbar. The welding hole group includes two welding holes, one of which is configured to be opposite to the terminal of one of two adjacent battery cells, and the other welding hole is configured to be opposite to the terminal of the other of the two adjacent battery cells; and the welding hole is configured to be opposite to the electrical connection area of ​​the busbar.

14. The cell connection assembly of claim 13, wherein, The supporting structure also has multiple explosion-proof openings, which are configured to correspond to the battery cells and are positioned opposite to the explosion-proof valves of the corresponding battery cells; wherein the explosion-proof openings are staggered from the busbars.

15. A battery pack, characterized by The battery pack includes at least one cell module, the cell module including a cell connection assembly according to any one of claims 8-14 and a plurality of cells; the cell connection assembly is disposed on the side of the cell where the terminal post is disposed.

16. The battery pack of claim 15, wherein, The battery cell module includes multiple first battery cell groups, which are arranged in a first direction, and each first battery cell group includes multiple first battery cells arranged sequentially in a second direction. The busbar includes an inter-cell busbar, which is used to electrically connect two first cells arranged adjacent to each other in the first direction; The first direction and the second direction are intersecting, and the second direction is the thickness direction of the first cell.

17. The battery pack of claim 16, wherein, The bus also includes a bridging bus for electrically connecting two first cells arranged adjacent to each other in the second direction.

18. The battery pack of claim 16, wherein, The busbar also includes a connecting busbar, and the battery cell module is provided with at least one connecting busbar, and two adjacent battery cell modules are electrically connected through the connecting busbar.

19. The battery pack of claim 15, wherein, The battery pack also includes a battery pack housing; The side of the protrusion away from the busbar body abuts against the inner wall of the battery pack housing; or, a gap is left between the side of the protrusion away from the busbar body and the inner wall of the battery pack housing.

20. The battery pack of claim 19, wherein, The battery pack housing includes a bottom protective plate, and the side of the protrusion away from the busbar body abuts against the inner wall of the bottom protective plate; or, a gap is left between the side of the protrusion away from the busbar body and the inner wall of the bottom protective plate.

21. The battery pack of claim 20, wherein, The battery pack also includes a filler adhesive; the plurality of protrusions and the busbar body form an open cavity, the filler adhesive is filled in the open cavity, and the side of the filler adhesive away from the busbar body is flush with the side of the protrusion away from the busbar body.

22. A vehicle, characterized in that, The vehicle includes the battery pack according to any one of claims 15-21.

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