Signal acquisition component, integrated busbar, battery module and battery pack

Abstract

A signal acquisition component, an integrated busbar, a battery module and a battery pack. The signal acquisition component comprises a signal acquisition body (1). Horizontal-U-shaped structures (2) are provided on ends of the signal acquisition body (1), each horizontal-U-shaped structure (2) comprising a buffer portion (21) and a connection portion (22) that are connected to each other, wherein one of the buffer portion (21) and the connection portion (22) extends in a direction approaching the middle of the signal acquisition body (1), and the other extends in a direction away from the middle of the signal acquisition body (1).

Description

A signal acquisition component, integrated busbar, battery module and battery pack

[0001] This application claims priority to Chinese patent application No. 202420155619.9 filed with the Chinese Patent Office on January 22, 2024, and priority to Chinese patent application No. 202410090048.X filed with the Chinese Patent Office on January 22, 2024. The entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a signal acquisition component, an integrated busbar, a battery module and a battery pack. Background Art

[0003] During normal use of the battery module (ie, in a charging state or a power supply state), the battery module will expand. When the battery expands, the gap between the busbars will also expand. SUMMARY OF THE INVENTION

[0004] The multiple battery cells inside the battery module generally expand from the middle to the sides, so the distance between the bus bars will change, causing a large pull at the connection between the two ends of the signal acquisition component and the bus bar, thereby reducing the service life of the signal acquisition component.

[0005] In a first aspect, the present application provides a signal acquisition component, comprising a signal acquisition body, wherein a ring-shaped structure is provided at the end of the signal acquisition body, the ring-shaped structure comprising a buffer portion and a connecting portion connected to each other, the buffer portion being connected to the signal acquisition body, the connecting portion being used to connect to a bus, one of the buffer portion and the connecting portion extending in a direction close to the middle of the signal acquisition body, and the other extending in a direction away from the middle of the signal acquisition body.

[0006] In a possible implementation of the first aspect, the buffer portion and the connecting portion constitute a U-shaped piece, the U-shaped piece includes a first end and a second end, the first end of the U-shaped piece is connected to the signal acquisition body, the second end of the U-shaped piece is used to connect to the bus, and the opening of the U-shaped piece is away from the middle of the signal acquisition body.

[0007] In a possible implementation of the first aspect, the signal acquisition body is further provided with a plurality of buffer arms, which are symmetrically arranged along the middle of the signal acquisition body, and the buffer arms on one side of the middle of the signal acquisition body and the buffer arms on the other side of the middle of the signal acquisition body extend in directions away from each other.

[0008] In a possible implementation of the first aspect, the buffer arm is an L-shaped piece, the L-shaped piece includes a first end and a second end, the first end of the L-shaped piece is connected to the signal acquisition body, and the second end of the L-shaped piece is used to connect to the bus.

[0009] In a possible implementation of the first aspect, both ends of the signal acquisition body are provided with a meandering structure, and the plurality of buffer arms are located between the meandering structures at the two ends.

[0010] In a possible implementation of the first aspect, the signal acquisition body is provided with end mounting holes, and the end mounting holes are provided at both end portions of the signal acquisition body, and / or;

[0011] The signal acquisition body is provided with a central mounting hole, and a plurality of central mounting holes are evenly arranged on the signal acquisition body along an extension direction of the signal acquisition body.

[0012] In a possible implementation of the first aspect, the signal acquisition body is provided with multiple mounting parts, the central mounting hole is provided on the mounting part, the mounting part and the buffer arm are located on the same side of the signal acquisition body, a first gap is formed between the buffer arm and the mounting part, a first pre-connection part is provided in the first gap, and the first pre-connection part connects the mounting part and the buffer arm.

[0013] In a possible implementation of the first aspect, a through hole is provided on at least one side of the middle mounting hole along an extension direction of the signal acquisition body.

[0014] In a possible implementation of the first aspect, the middle mounting hole is a waist-shaped hole, and an extension direction of the waist-shaped hole is along an expansion direction of the battery cell.

[0015] In a possible implementation of the first aspect, the signal acquisition body is provided with multiple mounting parts, a central mounting hole is provided on the mounting part, a second gap is formed between the meandering structure and the buffer arm or the mounting part, a second pre-connection part is provided in the second gap, and the second pre-connection part connects the meandering structure and the buffer arm or the mounting part.

[0016] In a second aspect, the present application provides an integrated busbar, comprising a busbar and a signal acquisition component according to the first aspect and any possible design thereof, wherein the connecting portion is connected to the busbar.

[0017] In a third aspect, an embodiment of the present application provides a battery module, comprising a plastic structural member, a bus, a signal acquisition component of the first aspect and any possible design thereof, a cell group, a cover plate and a side plate, the cell group comprising a plurality of cells, the bus and the signal acquisition component being mounted on the plastic structural member, the bus being electrically connected to the cell group, the side plate being connected to the cover plate through a first connecting member, the side plate being located on the side of the bus and the signal acquisition component away from the cell group, and the first connecting member and the signal acquisition component being separately arranged on both sides of the plastic structural member.

[0018] In a possible implementation of the third aspect, the first connecting member includes a rivet post, which is inserted into the cover plate and the side plate in a direction close to the signal acquisition component.

[0019] In a possible implementation of the third aspect, the signal acquisition component includes an FPC or an FFC, and the FPC or the FFC is located on a side of the bus close to the first connector.

[0020] In a possible implementation of the third aspect, the side panel includes a first bending portion and a second bending portion, the first bending portion is arranged parallel to the cover plate and is connected to the cover plate through a first connecting member, and the second bending portion is arranged parallel to the plastic structural member and is located on the side of the bus and the signal acquisition component away from the battery cell group.

[0021] In a possible implementation of the third aspect, the cover plate is located on one side of the battery cell group, the side plate is located on the other side of the battery cell group, the poles of the battery cell group are located on the side of the battery cell facing the side plate, and the busbar is electrically connected to the poles.

[0022] In a possible implementation of the third aspect, the plastic structural member includes a support bracket and a local positioning member, the local positioning member is connected to the busbar, the busbar is mounted on the support bracket, and the local positioning member can position the busbar on the battery cell.

[0023] In a possible implementation manner of the third aspect, the support bracket, the local positioning member, and the busbar are connected via a second connecting member, and the busbar is sandwiched between the support bracket and the local positioning member.

[0024] In a possible implementation manner of the third aspect, the length of the support bracket is greater than the length of the local positioning member, and the local positioning member is located in the middle of the support bracket along the length direction.

[0025] In a possible implementation of the third aspect, the local positioning member is located on a side of the support bracket close to the battery cell group, and the local positioning member includes a mounting portion and a positioning portion, the positioning portion is used to position the busbar on the pole of the battery cell, and the mounting portion is connected to the busbar.

[0026] In a possible implementation of the third aspect, the positioning portion includes a limiting frame surrounding the pole of the battery cell, a plurality of protrusions are provided inside the limiting frame, and the protrusions on the local positioning member are arranged toward the rounded edges of the pole of the battery cell.

[0027] In a possible implementation of the third aspect, the positioning portion includes a limiting frame surrounding the pole of the battery cell, the bus and the signal acquisition component are welded by nickel sheets to form a welding area, and an opening is reserved at the overlapping position of the limiting frame and the welding area.

[0028] In a possible implementation manner of the third aspect, the hardness of the local positioning member is greater than the hardness of the supporting bracket, and the supporting bracket is a blister bracket.

[0029] In a fourth aspect, an embodiment of the present application provides a battery pack, comprising a battery module according to the third aspect and any possible design thereof. Beneficial effects

[0030] The present application provides a signal acquisition component, an integrated busbar, a battery module and a battery pack. A toggle structure is provided at both ends of a signal acquisition body. The opening direction of the toggle structure is toward the middle of the signal acquisition body. When the battery cell expands, the gap between the busbars increases, and the busbar moves away from the middle of the signal acquisition body. Driven by the busbar, the toggle structure and the signal acquisition body can bend at the connection. In this process, the toggle structure is pushed into a relaxed state, and the toggle structure itself can bend. In this process, although the toggle structure is stretched, it is also in a relaxed state, so that the busbar connected to the toggle structure can produce a large displacement instead of generating a pulling force on the signal acquisition body, thereby reserving sufficient buffering capacity for the large displacement that may be generated by the busbars at both ends of the signal acquisition body, making it difficult for the signal acquisition body and the busbar to be damaged by the pulling force generated by the expansion of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic structural diagram of a signal acquisition component provided in an embodiment of the present application;

[0032] FIG2 is a front view of a signal acquisition component provided in an embodiment of the present application;

[0033] FIG3 is an enlarged schematic diagram of portion A in FIG2 provided in an embodiment of the present application;

[0034] FIG4 is an enlarged schematic diagram of portion B in FIG2 provided in an embodiment of the present application;

[0035] FIG5 is a schematic structural diagram of an integrated busbar provided in an embodiment of the present application;

[0036] FIG6 is a schematic cross-sectional view of a battery module according to an embodiment of the present application;

[0037] FIG7 is an enlarged schematic diagram of portion C in FIG6 provided in an embodiment of the present application;

[0038] FIG8 is a schematic structural diagram of an integrated busbar provided in an embodiment of the present application;

[0039] FIG9 is a plan view of an integrated busbar provided in an embodiment of the present application;

[0040] FIG10 is an enlarged schematic diagram of portion D in FIG9 provided in an embodiment of the present application;

[0041] FIG11 is a schematic structural diagram of a support bracket provided in an embodiment of the present application;

[0042] FIG12 is a schematic structural diagram of a local positioning member provided in an embodiment of the present application.

[0043] The reference numerals are as follows:

[0044] 1. Signal acquisition body; 2. Meander structure; 21. Buffer portion; 22. Connecting portion; 3. Buffer arm; 4. Mounting portion; 41. End mounting hole; 42. Middle mounting hole; 43. Through hole; 5. First gap; 51. First pre-connecting portion; 6. Second gap; 61. Second pre-connecting portion;

[0045] 100, plastic structural part; 110, supporting bracket; 111, matching part; 1111, first thermal rivet column; 1112, second thermal rivet column; 120, local positioning part; 121, mounting part; 1211, first mounting hole; 1212, second mounting hole; 122, positioning part; 1221, protrusion; 1222-limiting frame; 123, opening; 200, bus; 210, first through hole; 220, second through hole; 230, second connector 300, signal acquisition component; 310, FPC or FFC; 400, battery cell group; 410, battery cell; 420, pole; 500, cover plate; 600, side panel; 610, first bending part; 620, second bending part; 700, first connector. Modes for Carrying Out the Invention

[0046] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, with the first feature having a higher horizontal height than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, with the first feature having a lower horizontal height than the second feature.

[0048] In the description of this embodiment, terms such as "upper," "lower," "left," "right," "front," and "rear" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0049] Example 1

[0050] Electric vehicle power batteries are typically assembled from several single cells connected in series and parallel to provide the high voltage and high power required to power the vehicle. Cell connection is a key technology in power battery assembly. In traditional battery packs, integrated busbars are typically used to connect the battery packs in series and parallel. To collect real-time cell voltage and temperature, temperature sensors and voltage sampling harnesses are placed on the surface of the cells or integrated busbars.

[0051] The integrated busbar is mainly composed of signal acquisition components (FPC, PCB, FFC, etc.), plastic structural parts, buses, etc., which are connected into a whole through processes such as hot pressing or riveting to realize high-voltage series and parallel connection of battery cells, as well as temperature sampling and voltage sampling of battery cells. The temperature and voltage information are provided to the BMS system through FPC / PCB and connector components.

[0052] In the related art, since multiple battery cells in a battery module are prone to expansion, if the signal acquisition component is not designed to be tensile-resistant, it is easy to be pulled and damaged due to the increase in the gap between the battery cells.

[0053] Based on this, the present application provides a signal acquisition component.

[0054] Referring to Figures 1 to 3, Figure 1 is a structural schematic diagram of the signal acquisition component provided in an embodiment of the present application, Figure 2 is a front schematic diagram of the signal acquisition component provided in an embodiment of the present application, and Figure 3 is an enlarged schematic diagram of part A in Figure 2 provided in an embodiment of the present application.

[0055] In some embodiments, the signal acquisition component includes a signal acquisition body 1, and a meandering structure 2 is provided at the end of the signal acquisition body 1. The meandering structure 2 includes a buffer portion 21 and a connecting portion 22 connected to each other. The buffer portion 21 is connected to the signal acquisition body 1, and the connecting portion 22 is used to connect to the bus. One of the buffer portion 21 and the connecting portion 22 extends in a direction close to the middle of the signal acquisition body 1, and the other extends in a direction away from the middle of the signal acquisition body 1.

[0056] In one embodiment, the extension lengths of the two ends of the meandering structure 2 can be designed differently according to the degree of expansion of the battery cell (or the distance the busbar is displaced).

[0057] In one embodiment, the meandering structure 2 and the busbar are generally welded using tin material, and UV glue may be used to further enhance the connection strength.

[0058] In one embodiment, in the embodiment of the present application, the busbar is generally an aluminum busbar or a copper busbar.

[0059] A toggle structure 2 is provided at both ends of the signal acquisition body 1. When the battery cell expands, the gap between the bus bars increases, and the bus bars expand in a direction away from the middle of the signal acquisition body 1. Driven by the bus bars, the toggle structure 2 and the signal acquisition body can bend at the connection. In this process, the bending of the toggle structure 2 ensures that although it is stretched, it always remains connected to the acquisition body. Moreover, the bending of the toggle structure 2 reserves sufficient buffering capacity for the bus bars to expand outward due to the expansion of the battery cells. Thus, the problem of the signal acquisition body 1 being pulled or even damaged by the bus bars due to the expansion of the battery cells can be avoided.

[0060] In some embodiments of the present application, the buffer portion 21 and the connecting portion 22 constitute a U-shaped member, which includes a first end and a second end. The first end of the U-shaped member is connected to the signal acquisition body 1, and the second end of the U-shaped member is used to connect to the bus. The opening of the U-shaped member is away from the middle of the signal acquisition body 1.

[0061] In one embodiment, the buffer portion 21 and the connecting portion 22 may also constitute a semi-annular member.

[0062] In some embodiments of the present application, referring to Figure 4, Figure 4 is an enlarged schematic diagram of part B in Figure 2 provided in the embodiments of the present application. The signal acquisition body 1 is also provided with a plurality of buffer arms 3, and the plurality of buffer arms 3 are symmetrically arranged along the middle of the signal acquisition body 1. The buffer arm 3 on one side of the middle of the signal acquisition body 1 and the buffer arm 3 on the other side of the middle of the signal acquisition body 1 extend in directions away from each other.

[0063] In one embodiment, a plurality of buffer arms 3 are provided along one side edge of the signal acquisition body 1. The buffer arms 3 are L-shaped, and the gap formed between the buffer arms 3 and the signal acquisition body 1 faces the middle of the signal acquisition body 1. When the battery cells expand, the gap between the bus bars increases, and the bus bars expand in a direction away from the middle of the signal acquisition body 1. The battery cells on both sides expand in opposite directions. The plurality of buffer arms 3 symmetrically arranged along the middle of the signal acquisition body 1 can respectively buffer the expansion of the battery cells on both sides. Driven by the bus bars, the buffer arms 3 first bend to buffer the tension generated by the displacement of the bus bars, rather than generating a pulling force on the signal acquisition body 1. During this process, the buffer arms 3 are in a relaxed state, thereby preventing the signal acquisition body 1 from being damaged by the pulling force generated by the expansion of the battery cells between the signal acquisition body 1 and the bus bars.

[0064] In some embodiments of the present application, the buffer arm 3 is an L-shaped member, which includes a first end and a second end. The first end of the L-shaped member is connected to the signal acquisition body 1, and the second end of the L-shaped member is used to connect to the bus.

[0065] In one embodiment, the buffer arm 3 may be a bent part.

[0066] In some embodiments of the present application, a meandering structure 2 is provided at both ends of the signal acquisition body 1, and a plurality of buffer arms 3 are located between the meandering structures 2 at both ends.

[0067] Because the expansion force gradually accumulates from the center toward the ends, the buffer arm 3 in the center provides primary buffering for the cell's expansion, while the meandering structures 2 at the ends provide secondary buffering. This not only provides different buffers for different expansion forces, meeting the cell's buffering requirements, but also simplifies the structure of the signal acquisition component.

[0068] In some embodiments of the present application, as shown in FIG3 and FIG4 , the signal acquisition body 1 is provided with end mounting holes 41 , and the end mounting holes 41 are provided at both ends of the signal acquisition body 1 , and / or;

[0069] The signal acquisition body 1 is provided with a central mounting hole 42 , and a plurality of central mounting holes 42 are evenly arranged on the signal acquisition body 1 along the extension direction of the signal acquisition body 1 .

[0070] In one embodiment, the signal acquisition body 1 is provided with end mounting holes 41 and / or multiple middle mounting holes 42. The end mounting holes 41 are provided at both ends of the signal acquisition body 1, and the middle mounting holes 42 are evenly provided on the signal acquisition body 1 along the length direction of the signal acquisition body 1, so that the entire signal acquisition body 1 can be evenly mounted on the plastic bracket through the end mounting holes 41 and the middle mounting holes 42.

[0071] In some embodiments of the present application, as shown in Figure 4, the signal acquisition body 1 is provided with multiple mounting parts 4, the middle mounting hole 42 is provided on the mounting part 4, the mounting part 4 and the buffer arm 3 are located on the same side of the signal acquisition body 1, and a first gap 5 is formed between the buffer arm 3 and the mounting part 4. A first pre-connection part 51 is provided in the first gap 5, and the first pre-connection part 51 connects the mounting part 4 and the buffer arm 3.

[0072] In one embodiment, a plurality of mounting portions 4 are integrally provided on one side edge of the signal acquisition body 1, and a central mounting hole 42 is provided on the mounting portion 4. On the one hand, this will not affect the wiring arrangement inside the signal acquisition body 1, and on the other hand, it will not affect the ability of the signal acquisition body 1 to resist pulling, thereby not reducing the ability of the signal acquisition body 1 to resist the expansion of the battery cell.

[0073] In one embodiment, the mounting portion 4 and the buffer arm 3 are located on the same side edge of the signal acquisition body 1 , so that the width of the signal acquisition component can be limited.

[0074] In one embodiment, during the operation of the signal acquisition component, if the battery cell expands, the first pre-connection portion 51 breaks during the expansion of the battery cell, thereby allowing the buffer arm 3 to move normally within a preset maximum range. During the installation process, due to the presence of the first pre-connection portion 51, the range of movement of the buffer arm 3 relative to the signal acquisition body 1 is limited, which makes it easier to pre-position and weld the end of the second end of the buffer arm 3 on the signal acquisition body 1 to the bus.

[0075] In some embodiments of the present application, as shown in FIG. 4 , a through hole 43 is provided on at least one side of the middle mounting hole 42 along the extension direction of the signal acquisition body 1 .

[0076] In one embodiment, through-holes 43 are provided on both sides of the central mounting hole 42 along the length direction of the signal acquisition body 1. When the battery cell expands, the thermal rivet stud on the plastic bracket first pulls the connection between the through-hole 43 and the mounting hole, thereby increasing the movable space of the thermal rivet stud without damaging the signal acquisition body 1, thereby improving the ability of the signal acquisition component to resist the expansion of the battery cell.

[0077] In some embodiments of the present application, as shown in FIG4 , the middle mounting hole 42 is a waist-shaped hole, and the extending direction of the waist-shaped hole is along the expansion direction of the battery cell.

[0078] In one embodiment, the middle mounting hole 42 is a waist-shaped hole, which can further increase the movable space of the heat rivet column on the plastic bracket after the three holes are combined into one, thereby further improving the tensile strength of the signal acquisition component, thereby improving the ability of the signal acquisition component to resist the expansion of the battery cell.

[0079] In some embodiments of the present application, as shown in Figure 3, the signal acquisition body 1 is provided with multiple mounting parts 4, the middle mounting hole 42 is provided on the mounting part 4, and a second gap 6 is formed between the meandering structure 2 and the buffer arm 3 or the mounting part 4. A second pre-connection part 61 is provided in the second gap 6, and the second pre-connection part 61 connects the meandering structure 2 and the buffer arm 3 or the mounting part 4.

[0080] In one embodiment, when the battery cell expands during the operation of the signal acquisition component, the second pre-connection portion 61 breaks during the expansion of the battery cell, thereby allowing the meandering structure 2 to move normally within a preset maximum range. During the installation process, due to the presence of the second pre-connection portion 61, the movement range of the meandering structure 2 relative to the signal acquisition body 1 is limited, which makes it easier to pre-position and weld the end of the second end of the meandering structure 2 on the signal acquisition body 1 to the bus.

[0081] Refer to Figure 5, which is a structural schematic diagram of an integrated busbar provided in an embodiment of the present application. The present application provides an integrated busbar, including a signal acquisition component connection part 22 connected to a busbar as described in any of the above embodiments.

[0082] Since the signal acquisition component in the present application can improve the problem of large-scale pulling and breakage between the two ends of the signal acquisition component and the busbar due to the expansion of the battery cell during operation, the integrated busbar including the signal acquisition component also has the above beneficial effects.

[0083] Example 2

[0084] The integrated busbar is installed in the battery module (inside the battery pack) and is used to transmit the voltage and temperature information of various positions in the battery module to the battery management system. The integrated busbar includes plastic structural parts, busbars and signal acquisition components. The signal acquisition components are connected to the busbars and battery cells. The signal acquisition components and busbars are installed on the plastic structural parts. The signal acquisition components are used to collect the voltage in the busbar and the temperature in the battery module, thereby inputting the output signal into the battery management system.

[0085] 6 and 7 , FIG6 is a schematic structural diagram of a battery module provided in an embodiment of the present application, and FIG7 is an enlarged schematic diagram of portion C in FIG6 provided in an embodiment of the present application. The embodiment of the present application provides a battery module, comprising a plastic structural member 100, a busbar 200 (not shown in FIG6 and FIG7 ), a signal acquisition assembly 300, a battery cell group 400, a cover plate 500, and a side plate 600. The acquisition assembly 300 may be the acquisition assembly of any one of the above-mentioned first embodiments. The battery cell group 400 includes a plurality of battery cells 410. The busbar 200 and the signal acquisition assembly 300 are mounted on the plastic structural member 100. The busbar 200 is electrically connected to the battery cell group 400. The side plate 600 is connected to the cover plate 500 via a first connector 700. The side plate 600 is located on a side of the busbar 200 and the signal acquisition assembly 300 facing away from the battery cell group 400, and the first connector 700 and the signal acquisition assembly 300 are disposed on either side of the plastic structural member 100.

[0086] In one embodiment, under conventional circumstances, the signal acquisition assembly 300 is installed on the side of the plastic structural member 100 facing away from the battery cell group. That is, after the battery module is assembled, the signal acquisition assembly 300, nickel sheet, bus bar 200, etc. of the integrated busbar are all installed on the side of the plastic structural member 100 facing away from the battery cell 410. After the module cover is assembled, the appearance of the signal acquisition assembly 300, nickel sheet, and bus bar 200 can be seen. However, the existing battery module assembly is all riveted. When the signal acquisition assembly 300 is installed on the side of the plastic structural member 100 facing away from the battery cell 410, it is easy to damage the signal acquisition assembly 300 during the riveting process. In the embodiment of the present application, the signal acquisition assembly 300 is installed on the side of the plastic structural member 100 close to the battery cell 410, which can avoid scratching / damage to the signal acquisition assembly 300 due to the riveting method during the assembly of the battery module, thereby improving the service life of the entire integrated busbar.

[0087] In other embodiments, the signal acquisition component 300 may be installed on a side of the plastic structure 100 away from the battery cell 410 , and the first connector 700 may be disposed on a side of the plastic structure 100 close to the battery cell 410 .

[0088] In the embodiment of the present application, the first connector 700 and the signal acquisition component 300 are respectively arranged on both sides of the plastic structural component 100. In this way, when the cover plate 500 and the side plate 600 are installed through the first connector 700, the signal acquisition component 300 will not be scratched, thereby improving the service life of the entire integrated busbar.

[0089] 7 , in some embodiments of the present application, the first connector 700 includes a rivet post, which is plugged into the cover plate 500 and the side plate 600 in a direction close to the signal acquisition component 300 .

[0090] In one embodiment, the first connector 700 can be inserted into the cover plate 500 and the side plate 600 in a direction parallel to the main surface of the side plate 600, or can be inserted into the cover plate 500 and the side plate 600 in a direction parallel to the main surface of the cover plate 500. Since both are inserted into the cover plate 500 and the side plate 600 in a direction facing the signal acquisition assembly 300, the rivet studs insert into the cover plate 500 and the side plate 600 from the outside to the inside, making installation very convenient and easy to operate. However, if the rivet studs are inserted in the direction of the signal acquisition assembly 300 and the signal acquisition assembly 300 is located between the plastic structural member 100 and the first connector 700, it is very susceptible to scratches from the first connector 700. Therefore, the embodiment of the present application prevents the signal acquisition assembly 300 from being scratched by the first connector 700 when the cover plate 500 and the side plate 600 are installed by disposing the signal acquisition assembly 300 on the side of the plastic structural member 100 away from the first connector 700.

[0091] 1 and 7 , in some embodiments of the present application, the signal acquisition component 300 includes an FPC 310 or an FFC 310 , and the FPC 310 or the FFC 310 is located on a side of the bus 200 close to the first connector 700 .

[0092] In one embodiment, the FPC 310 or FFC 310 occupies a small space and is more convenient to arrange. The FPC 310 or FFC 310 is located on the side of the bus 200 close to the first connector 700 , which makes it easier to align and install the bus 200 with the pole 420 of the battery cell 410 .

[0093] As shown in Figure 7, in some embodiments of the present application, the side panel 600 includes a first bending portion 610 and a second bending portion 620. The first bending portion 610 is arranged parallel to the cover plate 500 and is connected to the cover plate 500 through a first connecting member 700. The second bending portion 620 is arranged parallel to the plastic structural member 100 and is located on the side of the bus 200 and the signal acquisition component 300 away from the battery cell group 400.

[0094] In one embodiment, the side panel 600 is bent into a first bend 610 and a second bend 620, so that the first bend 610 is parallel to the cover panel 500. The provision of the first bend 610 can increase the connection area between the side panel 600 and the cover panel 500, thereby not only improving the connection strength but also facilitating the first connector 700 to connect the side panel 600 and the cover panel 500. Thus, the first connector 700 can connect the first bend 610 and the cover panel 500, thereby connecting the side panel 600 and the cover panel 500. Furthermore, bending the side panel 600 into the first bend 610 and the second bend 620 can reduce wear between the side panel 600 and the cover panel 500.

[0095] As shown in Figure 7, in some embodiments of the present application, the cover plate 500 is located on one side of the battery cell group 400, the side plate 600 is located on the other side of the battery cell group 400, the pole 420 of the battery cell group 400 is located on the side of the battery cell 410 facing the side plate 600, and the bus 200 is electrically connected to the pole 420.

[0096] In one embodiment, the battery cell group 400 of the embodiment of the present application is a battery cell group of a blade battery. By setting the cover plate 500 on one side of the battery cell group 400 and setting the side plate 600 on the other side of the battery cell group 400, the pole 420 of the battery cell group 400 is set on the side of the battery cell 410 opposite to the side plate 600, and the bus 200 is electrically connected to the pole 420, the battery cell group 400 and the bus 200 can be easier to align with each other, and the installation efficiency is higher.

[0097] Refer to Figure 8, which is a structural schematic diagram of the integrated busbar provided in an embodiment of the present application. In some embodiments of the present application, the plastic structural member 100 includes a support bracket 110 and a local positioning member 120. The local positioning member 120 is connected to the busbar 200, and the busbar 200 is installed on the support bracket 110. The local positioning member 120 can position the busbar 200 on the battery cell 410.

[0098] In the related art, the plastic structural part 100 generally includes a support bracket 110 for installing the bus 200 and the signal acquisition component 300, and a local positioning part 120 for positioning the pole 420 of the battery cell 410 and the bus 200. Usually, the support bracket 110 and the local positioning part 120 are integrated, and the integrated support bracket 110 and the local positioning part 120 require thicker or harder plastic parts, which has a high mold opening cost and a relatively high material cost. In the embodiment of the present application, the support bracket 110 for installing the bus 200 and the signal acquisition component 300 and the local positioning member 120 for positioning the pole 420 of the battery cell 410 in the plastic structural member 100 are molded separately, or the plastic structural member 100 can be molded as a whole with uneven thickness. The support bracket 110 part plays the role of supporting and insulating the bus 200, and the local positioning member 120 part plays the role of positioning the bus 200. That is, it is only necessary to ensure the hardness or thickness of the local positioning member 120. In this way, the preparation cost of the plastic structural member 100 can be lowered while ensuring the positioning of the bus 200 and the battery cell 410.

[0099] Referring to Figures 8 and 9, Figure 9 is a planar schematic diagram of the integrated busbar provided in an embodiment of the present application. In some embodiments of the present application, the support bracket 110, the local positioning member 120 and the busbar 200 are connected by a second connecting member 230, and the busbar 200 is clamped between the support bracket 110 and the local positioning member 120.

[0100] In one embodiment, the support bracket 110, the local positioning member 120, and the busbar 200 are connected via a second connector 230. The second connector 230 may be a heat rivet stud, which may be integrally provided on the support bracket 110. The heat rivet stud passes through the hole in the busbar 200 and the heat rivet hole in the local positioning member 120 to connect the support bracket 110, the local positioning member 120, and the busbar 200. In other embodiments, the second connector 230 may also be a bolt, or other connection methods may be used. By connecting the support bracket 110, the local positioning member 120, and the busbar 200 through the same second connector 230, the connection structure is simple and can better clamp and secure the busbar 200.

[0101] 8 and 9 , in some embodiments of the present application, the length of the support bracket 110 is greater than the length of the local positioning member 120 , and the local positioning member 120 is located in the middle of the support bracket 110 along its length direction (as shown by the arrow in the figure).

[0102] In one embodiment, the purpose of setting the local positioning member 120 in the middle of the support bracket 110 is because the positioning tolerance of the bus 200 and the battery cell 410 gradually accumulates from the middle to the two ends. Setting the local positioning member 120 in the middle, that is, setting the positioning reference in the middle, can maximize the reduction of the accumulated positioning tolerance between the battery cells 410 at both ends and the corresponding bus 200, thereby avoiding the problem of being unable to assemble due to interference between the integrated busbar and the battery cell group 400.

[0103] Referring to Figures 9, 10 and 12, Figure 9 is a planar schematic diagram of the integrated busbar provided in an embodiment of the present application, Figure 10 is an enlarged schematic diagram of part D in Figure 9 provided in an embodiment of the present application, and Figure 12 is a structural schematic diagram of the local positioning member 120 provided in an embodiment of the present application. In some embodiments of the present application, the local positioning member 120 is located on the side of the support bracket 110 close to the battery cell group, and the local positioning member 120 includes an installation portion 121 and a positioning portion 122. The positioning portion 122 is used to position the busbar on the pole 420 of the battery cell 410, and the installation portion 121 is connected to the busbar 200.

[0104] In one embodiment, the local positioning member 120 includes a mounting portion 121 and a positioning portion 122 for positioning the pole 420 of the battery cell 410 on the busbar 200, so as to achieve positioning between the busbar 200 and the pole 420 of the battery cell 410, thereby making the welding position between the pole 420 of the battery cell 410 and the busbar 200 more accurate.

[0105] Specifically, the second connecting member 230 of this embodiment includes a first heat rivet stud 1111 and a second heat rivet stud 1112. The first mounting hole 1211 and the second mounting hole 1212 are provided on the mounting portion 121, and the first heat rivet stud 1111 and the second heat rivet stud 1112 on the support bracket 110 cooperate with each other to achieve the installation and fixation between the support bracket 110 and the local positioning member 120. In the first aspect, it is possible to avoid the need to additionally provide heat rivet studs on the support bracket 110 and the local positioning member 120, thereby avoiding the need to increase the preparation process of the plastic structural member 100. and material costs. On the second hand, the use of the first mounting hole 1211 and the second mounting hole 1212 can prevent the local positioning member 120 from rotating relative to the support bracket 110 and thus loosening. On the third hand, the first mounting hole 1211 and the second mounting hole 1212 correspond one-to-one with the first through hole 210 and the second through hole 220 respectively, which can more accurately realize the positioning between the bus 200 and the pole 420 of the battery cell 410, thereby making the welding position alignment between the pole 420 of the battery cell 410 and the bus 200 more accurate.

[0106] Referring to Figures 10 and 12, in some embodiments of the present application, the positioning portion 122 includes a limiting frame 1222 surrounding the pole 420 of the battery cell 410, and a plurality of protrusions 1221 are arranged on the inner side of the limiting frame 1222. The protrusions 1221 on the local positioning member 120 are arranged toward the rounded edges of the pole 420 of the battery cell 410.

[0107] In one embodiment, the positioning portion 122 is a limiting frame 1222, which can limit the pole 420 of the battery cell 410 based on the outer wall size of the pole 420 of the battery cell 410. A plurality of protrusions 1221 are arranged on the inner side of the limiting frame 1222, which can prevent the pole 420 of the battery cell 410 from moving around in the limiting frame 1222 after entering the limiting frame 1222. To this end, the inner wall size of the limiting frame 1222 can be set to be slightly larger than the outer wall size of the pole 420 of the battery cell 410, and the protrusion 1221 can be adapted to the corresponding recess on the battery cell 410, which is more conducive to quickly and accurately positioning the pole 420 of the battery cell 410.

[0108] In one embodiment, the protrusion 1221 on the local positioning member 120 is arranged with rounded corners toward the pole 420 of the battery cell 410, so that during the installation process of the pole 420 of the battery cell 410, the protrusion 1221 on the local positioning member 120 can guide the pole 420 of the battery cell 410 to be positioned faster.

[0109] 10 and 12 , in some embodiments of the present application, the positioning portion 122 includes a limiting frame 1222 surrounding the pole 420 of the battery cell 410 , the bus 200 and the signal acquisition component 300 are welded by nickel sheets to form a welding area, and an opening 123 is reserved at the overlapping position of the limiting frame 1222 and the welding area.

[0110] In one embodiment, since part of the position of the limit frame 1222 overlaps with the area where the bus 200 is originally welded to the signal acquisition component 300, it is necessary to set an opening 123 at the overlapping position where the limit frame 1222 is located. In this way, the positioning between the pole 420 of the battery cell 410 and the bus 200 can also be achieved without affecting the welding between the signal acquisition component 300 and the bus 200. Furthermore, the opening 123 reserved at the overlapping position of the limit frame 1222 and the welding area can make the limit frame 1222 more flexible, thereby making the positioning between the pole 420 of the battery cell 410 and the bus 200 faster.

[0111] In some embodiments of the present application, the hardness of the local positioning member 120 is greater than the hardness of the supporting bracket 110 .

[0112] In one embodiment, in the related art, in order to save costs, the support bracket 110 is set to a component with a thinner thickness or a softer material. For example, the support bracket 110 is a blister bracket, and the local positioning member 120 is a plastic bracket. At this time, when the bus 200 is welded to the pole 420 of the battery cell 410, due to the soft texture of the local positioning member 120, it cannot play its positioning effect well. The external jig cannot position the bus 200 and the pole 420 of the battery cell 410 by clamping the support bracket 110, which leads to insufficient installation accuracy. The present application sets the local positioning member 120 and the support bracket 110 separately, so that the local positioning member 120 is harder than the support bracket 110 due to the different thickness and material. Specifically, in this embodiment, the local positioning bracket 12 is made of PC+ABS with a thickness of 1.2~1.5mm, and the support bracket 110 is made of PC with a general thickness of 0.5mm. Therefore, on the one hand, the material cost of the plastic structural component 100 can be reduced; on the other hand, the local positioning component 120 with greater hardness can achieve a more precise positioning effect during the positioning of the busbar 200 and the pole 420 of the battery cell 410, thereby making the welding between the busbar 200 and the pole 420 of the battery cell 410 more accurate.

[0113] In some embodiments of the present application, the support bracket 110 is a blister bracket.

[0114] In this way, the support bracket 110 and the local positioning member 120 may be made of the same material but manufactured in different ways, and the hardness of the support bracket 110 is softer than that of the local positioning member 120 .

[0115] Referring to Figures 9 and 11, Figure 9 is a planar schematic diagram of the integrated busbar provided in an embodiment of the present application, and Figure 11 is a structural schematic diagram of the support bracket 110 provided in an embodiment of the present application. In some embodiments of the present application, there are multiple busbars 200, and each busbar 200 is respectively provided with a first through hole 210 and a second through hole 220. The support bracket 110 is respectively provided with a matching portion 111 corresponding to the busbar 200, and the matching portion 111 is provided with a first thermal rivet column 1111 and a second thermal rivet column 1112 corresponding to the first through hole 210 and the second through hole 220. The first thermal rivet column 1111 and the second thermal rivet column 1112 are the above-mentioned second connecting member 230.

[0116] In one embodiment, a plurality of busbars 200 are installed on the first thermal rivet studs 1111 and the second thermal rivet studs 1112 on the mating portion 111 through the first through holes 210 and the second through holes 220 to achieve the installation of the busbars 200 and the support bracket 110. The two positioning pins can prevent the busbars 200 from rotating relative to the support bracket 110 and becoming loose.

[0117] In some embodiments of the present application, the fuse on the signal acquisition component 300 is a chip fuse.

[0118] In one embodiment, the fuse on the signal acquisition component 300 is a chip fuse. This can, on the one hand, solve the problem of strict requirements on acquisition line resistance; on the other hand, the chip fuse has the characteristic of slow blowing, which can alleviate the impact caused by the pulse current of the detection equipment; on the other hand, compared with the etched fuse, the chip fuse is repairable, which can reduce the module loss caused by the fuse blowing due to misoperation.

[0119] In some embodiments of the present application, the bus 200 and the signal acquisition component 300 are welded, and the bus 200 and the signal acquisition component 300 are also bonded with UV glue.

[0120] In one embodiment, UV glue protection is added to the welding point between the signal acquisition component 300 and the nickel sheet to avoid the problem of solder joints falling off due to the stress generated by the expansion of the battery module at the soft and hard connections between the nickel sheet and the signal acquisition component 300, thereby reinforcing the soft and hard connections. At the same time, the glue at the collection point covers the surface of the welding sheet, which can prevent the increase in resistance due to oxidation during the soldering of the nickel sheet and the signal acquisition component 300, thereby preventing the problem of low accuracy of the collection results of the signal acquisition component 300.

[0121] In one embodiment of the present application, a battery pack is further provided, comprising a battery module as described in any of the above embodiments.

[0122] Since the battery module in the present application can improve the situation where the first connecting member easily scratches the signal acquisition component of the integrated busbar, the battery pack including the battery module also has the above beneficial effects.

Claims

1. A signal acquisition component, comprising a signal acquisition body (1), wherein an end of the signal acquisition body (1) is provided with a loop structure (2), the loop structure (2) includes a buffer part (21) and a connection part (22) connected to each other, the buffer part (21) is connected to the signal acquisition body (1), the connection part (22) is used for connecting to a busbar, and one of the buffer part (21) and the connection part (22) extends towards the middle of the signal acquisition body (1), and the other extends away from the middle of the signal acquisition body (1).

2. The signal acquisition component according to claim 1, wherein The buffer part (21) and the connection part (22) form a U-shaped part, the U-shaped part includes a first end and a second end, the first end of the U-shaped part is connected to the signal acquisition body (1), and the second end of the U-shaped part is used for connecting to a busbar, and the opening of the U-shaped part faces away from the middle of the signal acquisition body (1).

3. The signal acquisition component according to claim 1, wherein the signal acquisition body (1) is further provided with a plurality of buffer arms (3), the plurality of buffer arms (3) are symmetrically arranged along the middle of the signal acquisition body (1), and the buffer arms (3) on one side of the signal acquisition body (1) extend in a direction away from the buffer arms (3) on the other side of the signal acquisition body (1).

4. The signal acquisition component according to claim 3, wherein The buffer arm (3) is an L-shaped part, the L-shaped part includes a first end and a second end, the first end of the L-shaped part is connected to the signal acquisition body (1), and the second end of the L-shaped part is used for connecting to a busbar.

5. The signal acquisition component according to claim 3, wherein the loop structure (2) is provided at both ends of the signal acquisition body (1), and the plurality of buffer arms (3) are located between the loop structures (2) at both ends.

6. The signal acquisition component according to claim 3, wherein the signal acquisition body (1) is provided with end mounting holes (41), the end mounting holes (41) are provided at both ends of the signal acquisition body (1), and / or; The signal acquisition body (1) is provided with middle mounting holes (42), and the plurality of middle mounting holes (42) are uniformly arranged along the extending direction of the signal acquisition body (1).

7. The signal acquisition component according to claim 6, wherein the signal acquisition body (1) is provided with a plurality of mounting parts (4), the middle mounting holes (42) are provided in the mounting parts (4), the mounting parts (4) and the buffer arms (3) are on the same side of the signal acquisition body (1), a first gap (5) is formed between the buffer arms (3) and the mounting parts (4), and a first pre-connection part (51) is provided in the first gap (5), and the first pre-connection part (51) connects the mounting part (4) and the buffer arm (3).

8. The signal acquisition component according to claim 6, wherein, The middle mounting hole (42) is provided with a through hole (43) on at least one side along the extending direction of the signal acquisition body (1).

9. The signal acquisition component according to claim 6, wherein The middle mounting hole (42) is an oval hole, and the extending direction of the oval hole is along the direction of the expansion of the battery cell.

10. The signal acquisition component according to claim 6, wherein the signal acquisition body (1) is provided with a plurality of mounting parts (4), the middle mounting hole (42) is arranged on the mounting part (4), a second gap (6) is formed between the loop structure (2) and the buffer arm (3) or the mounting part (4), a second pre-connection part (61) is arranged in the second gap (6), and the second pre-connection part (61) connects the loop structure (2) and the buffer arm (3) or the mounting part (4).

11. An integrated busbar, comprising a busbar and the signal acquisition component according to claims 1 to 10, wherein the connection part (22) is connected to the busbar.

12. A battery module, comprising a plastic structural member (100), a busbar (200), the signal acquisition component (300) according to any one of claims 1 to 10, an electric core group (400), a cover plate (500) and a side plate (600), wherein the electric core group (400) comprises a plurality of electric cores (410), the busbar (200) and the signal acquisition component (300) are mounted on the plastic structural member (100), the busbar (200) is electrically connected to the electric core group (400), the side plate (600) is connected to the cover plate (500) through a first connecting member (700), the side plate (600) is located on one side of the busbar (200) and the signal acquisition component (300) away from the electric core group (400), and the first connecting member (700) and the signal acquisition component (300) are respectively arranged on two sides of the plastic structural member (100).

13. The battery module according to claim 12, wherein, The first connecting member (700) comprises a riveting post, and the riveting post is inserted into the cover plate (500) and the side plate (600) in a direction approaching the signal acquisition component (300).

14. The battery module according to claim 12, wherein, The signal acquisition component (300) comprises an FPC (310) or an FFC (310), and the FPC (310) or the FFC (310) is located on one side of the busbar (200) close to the first connecting member (700).

15. The battery module according to claim 12, wherein, The side plate (600) comprises a first bending part (610) and a second bending part (620), the first bending part (610) is arranged in parallel with the cover plate (and is connected to the cover plate (500) through the first connecting member (700), and the second bending part (620) is arranged in parallel with the plastic structural member (100) and is located on one side of the busbar (200) and the signal acquisition component (300) away from the electric core group (400).

16. The battery module according to claim 12, wherein, The cover plate (500) is located on one side of the electric core group (400), the side plate (600) is located on the other side of the electric core group (400), a pole column (420) of the electric core group (400) is arranged on one side of the electric core (410) facing the side plate (600), and the busbar (200) is electrically connected to the pole column (420).

17. The battery module according to any one of claims 12-16, wherein, The plastic structural member (100) includes a support bracket (110) and a local positioning member (120). The local positioning member (120) is connected to the bus bar (200). The bus bar (200) is installed on the support bracket (110). The local positioning member (120) can position the bus bar (200) relative to the battery cell (410).

18. The battery module according to claim 17, wherein, The support bracket (110), the local positioning member (120), and the bus bar (200) are connected by a second connecting member (230). The bus bar (200) is clamped between the support bracket (110) and the local positioning member (120).

19. The battery module according to claim 17, wherein, The length of the support bracket (110) is greater than the length of the local positioning member (120). The local positioning member (120) is located in the middle of the support bracket (110) along the length direction.

20. The battery module according to any one of claims 17-19, wherein, The local positioning member (120) is located on the side of the support bracket (110) close to the battery cell group (400). The local positioning member (120) includes a mounting portion (121) and a positioning portion (122). The positioning portion (122) is used to position the bus bar (200) relative to the pole column (420) of the battery cell (410). The mounting portion (121) is connected to the bus bar (200).

21. The battery module according to claim 20, wherein, The positioning portion (122) includes a limiting frame (1222) surrounding the pole column (420) of the battery cell (410). A plurality of convex portions (1221) are provided inside the limiting frame (1222). The convex portions (1221) on the local positioning member (120) are arranged facing the edge fillet of the pole column (420) of the battery cell (410).

22. The battery module according to claim 20, wherein, The positioning portion (122) includes a limiting frame (1222) surrounding the pole column (420) of the battery cell (410). The bus bar (200) and the signal acquisition component (300) are welded by a nickel sheet to form a welding area. An opening (123) is reserved at the overlapping position of the limiting frame (1222) and the welding area.

23. The battery module according to any one of claims 17-19, wherein, The hardness of the local positioning member (120) is greater than the hardness of the support bracket (110). The support bracket (110) is a plastic suction bracket.

24. A battery pack, comprising the battery module according to any one of claims 12 to 23.

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