Busbar assembly and battery pack

Abstract

The application relates to the technical field of batteries, and discloses a busbar assembly and a battery pack. The busbar assembly comprises a busbar and a fixing plate, wherein the busbar is used for connecting two adjacent battery units; the fixing plate is provided with a plurality of placing grooves, and one busbar is placed in each placing groove; an elastic limiting structure is arranged in the placing groove, and the elastic limiting structure is in abutment with the busbar placed in the placing groove to elastically limit the busbar along the arrangement direction of the plurality of placing grooves. When the busbar provided by the application is applied, the fixing plate with the plurality of busbars can be directly taken to perform assembly operation, and the assembly efficiency can be improved. Meanwhile, the busbar assembly provided by the application is provided with the elastic limiting structure in the placing groove, so that the busbar can slide along the arrangement direction of the plurality of limiting grooves to adjust the relative position of the busbar and the battery unit, and the connection precision of the busbar and the battery unit is improved.

Description

TECHNICAL FIELD

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

[0002] A plurality of battery cells are arranged in the battery pack, and the busbar is used to connect the battery cells to output voltage signals and the like.

[0003] However, the installation of the busbar needs to be operated separately, which is low in efficiency and poor in accuracy. SUMMARY

[0004] The present application provides a busbar assembly and a battery pack to improve the assembly efficiency and the connection accuracy of the busbar and the battery cell.

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

[0006] According to a first aspect of the present application, a busbar assembly is provided, comprising a busbar and a fixing plate, wherein:

[0007] The busbar is used to connect two adjacent battery cells;

[0008] The fixing plate is provided with a plurality of placing grooves, and each placing groove is arranged with one busbar; the placing groove is provided with an elastic limiting structure, and the elastic limiting structure is in abutment with the busbar arranged in the placing groove to elastically limit the busbar along the arrangement direction of the plurality of placing grooves.

[0009] In the busbar assembly provided by the present application, one busbar can be arranged in each placing groove of the fixing plate. When the busbar provided by the present application is applied, the fixing plate arranged with a plurality of busbars can be directly taken out for assembly operation, which can improve the assembly efficiency. Meanwhile, the busbar assembly provided by the present application is provided with the elastic limiting structure in the placing groove, which can make the busbar slide along the arrangement direction of the plurality of placing grooves to adjust the relative position of the busbar and the battery cell, thereby improving the connection accuracy of the busbar and the battery cell.

[0010] According to a second aspect of the present application, a battery pack is provided, comprising the busbar assembly according to any of the above technical solutions.

[0011] The battery provided by the application can place one bus bar in each placing groove on the fixing plate in the bus bar assembly, and in application, the fixing plate with multiple bus bars can be directly taken to perform assembly operation, so as to improve assembly efficiency. Meanwhile, the bus bar assembly provided by the application can be provided with elastic limiting structures in the placing grooves, so that the bus bar can slide in the arrangement direction of the multiple limiting grooves, so as to adjust the relative position of the bus bar and the battery unit, and improve the connection accuracy of the bus bar and the battery unit. BRIEF DESCRIPTION OF DRAWINGS

[0012] For better understanding of the present disclosure, reference can be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and relevant elements can be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, relevant elements or components can have different settings as known in the art. Furthermore, in the drawings, the same reference signs represent the same or similar components in each drawing. Among them:

[0013] Figure 1 Structure schematic diagram of the battery provided by the embodiment of the present application;

[0014] Figure 2 Structure schematic diagram of the battery provided by the embodiment of the present application; Figure 1 Structure schematic diagram of the battery provided by the embodiment of the present application;

[0015] Figure 3 Structure schematic diagram of the bus bar assembly provided by the embodiment of the present application;

[0016] Figure 4 Another structure schematic diagram of the bus bar assembly provided by the embodiment of the present application;

[0017] Figure 5 Another structure schematic diagram of the fixing plate in the bus bar assembly provided by the embodiment of the present application;

[0018] Figure 6 Partial sectional view of the bus bar assembly provided by the embodiment of the present application after assembly.

[0019] The reference signs are explained as follows:

[0020] 100, bus bar; 110, body part; 120, connecting part; 130, bending part; 200, fixing plate; 210, fixing part; 211, placing groove; 212, elastic limiting structure; 2121, support main body; 2122, elastic member; 220, insulation part; 230, limiting structure; 240, locking part; 250, auxiliary insulation part; 260, notch; 300, battery unit; 310, battery shell; 320, electrode terminal; A, groove; P, flange; M, right side area; N, left side area. DETAILED DESCRIPTION

[0021] The technical solutions in the exemplary embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of this disclosure.

[0022] In the description of this disclosure, unless otherwise expressly specified and limited, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term “multiple” refers to two or more; and the term “and / or” includes any and all combinations of one or more associated listed items. In particular, references to “the / described” object or “a” object are also intended to indicate one of a possible plurality of such objects.

[0023] Unless otherwise specified or stated, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be 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.

[0024] Furthermore, it should be understood that the directional terms such as "upper," "lower," "inner," and "outer" described in the exemplary embodiments of this disclosure are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the exemplary embodiments of this disclosure. It should also be understood that, in the context of a reference to an element or feature being connected to another element(s) "upper," "lower," "inner," or "outer," it can be directly connected to the other element(s) "upper," "lower," "inner," or "outer," or indirectly connected to the other element(s) "upper," "lower," "inner," or "outer" through an intermediate element.

[0025] This application provides a bus component. Figure 1 This is a schematic diagram of the bus component used in the embodiments of this application. Figure 2 for Figure 1 Explosion diagram of the middle section structure; Figure 3 and Figure 4 This is a partially enlarged schematic diagram of the bus assembly provided in an embodiment of this application. Please refer to... Figures 1 to 4 The structure shown in this application embodiment includes: a busbar 100 and a fixing plate 200, wherein:

[0026] Bus 100 is used to connect two adjacent battery cells 300;

[0027] The fixing plate 200 is provided with a plurality of placement grooves 211, and a bus bar 100 is placed in each placement groove 211; an elastic limiting structure 230 is provided in the placement groove 211, and the elastic limiting structure 230 abuts against the bus bar 100 placed in the placement groove 211 to elastically limit the bus bar 100 along the arrangement direction of the plurality of placement grooves 211.

[0028] Specifically, in the bus bar assembly provided by the embodiment of the present application, one bus bar 100 can be placed in each placement groove 211 of the fixing plate 200. When applying the bus bar 100 provided by the embodiment of the present application, the fixing plate 200 with a plurality of bus bars 100 placed thereon can be directly taken for assembly operations, which can improve the assembly efficiency. At the same time, the bus bar assembly provided by the embodiment of the present application can make the bus bar 100 have a certain sliding amount along the arrangement direction of the plurality of limiting grooves by providing the elastic limiting structure 230 in the placement groove 211, so as to facilitate the adjustment of the relative position between the bus bar 100 and the battery unit 300, thereby improving the connection accuracy between the bus bar 100 and the battery unit 300.

[0029] It should be noted that each placement groove 211 is a through groove so that part of the bus bar can pass through the placement groove 211 to be connected to the battery unit. At the same time, the elastic limiting structure 212 in each placement groove 211 can be one or more. Exemplarily, as Figure 3 shown, one elastic limiting structure 212 is provided in each placement groove 211.

[0030] In one embodiment, the bus bar 100 includes a body portion 110 and two connecting portions 120. Each connecting portion 120 is used to connect the electrode terminal 320 of a battery unit 300, and a bending portion 130 is provided between each connecting portion 120 and the body portion 110, and the two bending portions 130 are arranged oppositely. It should be understood that Figure 4 the bus bar 100 in forms a structure similar to a "Ji" character.

[0031] Please continue to refer to Figure 3 and Figure 4 the structure shown. The elastic limiting structure 230 is placed between two adjacent bending portions 130 and abuts against the surface of one bending portion 130 facing the other bending portion 130.

[0032] It should be noted that when assembling the bus bar assembly provided by the embodiment of the present application, the bus bar 100 can be directly placed into the corresponding placement groove 211, which can improve the alignment accuracy between the bus bar 100 and the battery unit 300. Specifically, the two connecting portions 120 of the bus bar 100 can be passed through the placement groove 211, and the elastic limiting structure 230 is placed between the two bending portions 130 and abuts against the inner surface of at least one bending portion 130. Please refer toFigure 3 As shown in the structure, the arrangement direction of the plurality of placement grooves 211 forms a first direction, and the two bending portions 130 are arranged along the first direction.

[0033] It is worth noting that the busbar assembly provided by the embodiment of the present application can make the busbar 100 slide in the first direction by arranging the elastic limiting structure 230 to abut against the inner surface of the at least one bending portion 130, so as to adjust the relative position of the connecting portion 120 of the busbar 100 and the electrode terminal 320 in the battery cell 300, thereby improving the connection accuracy of the busbar 100 and the battery cell 300.

[0034] Specifically, when the connecting portion 120 of the busbar 100 and the electrode terminal 320 of the battery cell 300 have an error in the first direction, the busbar 100 can be moved in the first direction to partially compress the elastic limiting structure 230, and after the connecting portion 120 and the electrode terminal 320 are aligned, the electrode terminal 320 and the connecting portion 120 can be connected.

[0035] In order to avoid the movable amount of the busbar 100 in the first direction being too large and being detached from the placement groove 211, the movable amount of the busbar 100 in the first direction can be set to ±3mm. For example, the movable amount can be selected as -3mm, -2.5mm, -2mm, -1.5mm, -1mm, -0.5mm, 0mm, +0.5mm, +1mm, +1.5mm, +2mm, +2.5mm, +3mm.

[0036] Of course, the elastic limiting structure 212 can also be arranged to abut against the side of the bending portion 130 away from the other bending portion 130 according to requirements, and the specific arrangement can be set according to requirements, which will not be described here. It is worth noting that there are many possible structural forms of the busbar 100, and the elastic limiting structure 212 can abut against different parts of the busbar 100 according to requirements.

[0037] In one embodiment, as shown in Figure 3 and Figure 4 The elastic limiting structure 230 includes a support body 2121 and an elastic member 2122, wherein:

[0038] The support body 2121 is fixed in position relative to the placement groove 211;

[0039] One end of the elastic member 2122 is fixed to the support body 2121, and the other end extends away from the support body 2121 and abuts against the bending portion 130.

[0040] For example, as shown in Figure 3 and Figure 4As shown, the support body 2121 is a plate-shaped structure arranged in the middle of the placement groove 211, and the support body 2121 is connected to the opposite two groove walls of the placement groove 211 to improve stability; at the same time, the support body 2121 can abut the surface of the body portion 110 on the side facing the battery unit 300 to improve the flatness of the plurality of busbars 100 installed on the fixed plate 200.

[0041] It should be understood that the support body 2121 can also be connected to only one groove wall of the placement groove 211, which can be set according to requirements, and will not be described here.

[0042] Please continue to refer to Figure 3 and Figure 4 As shown in the structure, the elastic member 2122 is an extension arm extending from one side of the support body 2121, and the extension arm has an included angle with the body portion, so that when the busbar 100 presses the extension arm, the size between the extension arm and the support body 2121 is reduced by the movement of the extension arm in the first direction.

[0043] Of course, the elastic member 2122 can also be provided in other structures, for example, the elastic member 2122 can be a spiral structure, one end of which is connected to the support body 2121 and the other end abuts the inner wall of the bent portion 130 of the busbar 100, and at the same time, the spiral structure can be compressed in the first direction.

[0044] In one embodiment, please continue to refer to Figure 3 and Figure 4 As shown in the structure, the support body 2121 has a groove A, and the opening of the groove A is located on the side of the support body 2121 facing the bent portion 130; one end of the elastic member 2122 is arranged in the groove A, and the other end protrudes out of the groove A.

[0045] It should be noted that along the first direction, the groove A provided on the support body 2121 can accommodate at least part of the elastic member 2122 when the elastic limiting structure 230 is in a compressed state.

[0046] Along the first direction, under the same size of the placement groove 211, the size between the end of the elastic member 2122 abutting the busbar 100 and the support body 2121 can be set larger, and thus the compressible amount of the elastic member 2122 can be set larger, so as to improve the adjustable amount of the busbar 100 in the placement groove 211, and better improve the alignment accuracy of the busbar 100 and the battery unit 300.

[0047] Of course, the elastic member 2122 can also be connected to the support body 2121 outside the groove A, which can be set according to requirements, and will not be described here.

[0048] Please continue to refer to Figure 3 and Figure 4As shown in the structure, a support body 2121 is arranged inside the placing groove 211, in an embodiment, as shown in Figure 3 As shown, along the first direction, the width of the placing groove 211 is greater than the width of the busbar 100.

[0049] It should be noted that, along the first direction, when the size of the placing groove 211 is greater than the size of the busbar 100, the busbar 100 can be placed into the placing groove 211 from the side of the fixed plate 200 away from the battery cell 300, and the connecting portion 120 of the busbar 100 can pass through the placing groove 211 to be connected with the battery cell 300.

[0050] When the busbar assembly provided by the embodiment of the present application is applied, each busbar 100 is placed in the corresponding placing groove 211, and if a certain busbar 100 has a problem, the "problematic" busbar 100 can be directly disassembled from the side of the fixed plate 200 away from the battery cell 300, without having to disassemble the busbar 100 and the fixed plate 200 as a whole, thereby facilitating the simplification of disassembly and assembly operations.

[0051] In an embodiment, please continue to refer to Figure 3 As shown in the structure, the fixed plate 200 further includes a limiting structure 230 arranged on the groove wall of the placing groove 211, and the limiting structure 230 is used to prevent the busbar 100 from being pulled out of the opening of the placing groove 211. For example, as shown in Figure 3 As shown, the limiting structure 230 is located on the side of the body portion 110 of the busbar 100 away from the connecting portion 120.

[0052] It should be noted that the limiting structure 230 can prevent the busbar 100 from being pulled out of the placing groove 211, so as to improve the stability of the busbar 100 after being placed in the placing groove 211, thereby improving the assembly efficiency.

[0053] In an embodiment, please continue to refer to Figure 3 As shown in the structure, the limiting structure 230 includes at least one protruding block group, the protruding block group includes a plurality of protruding blocks, and the plurality of protruding blocks are arranged at intervals. For example, as shown in Figure 3 As shown, one protruding block group can be arranged on each side groove wall of the placing groove 211, and each protruding block group includes two protruding blocks arranged at intervals. It should be understood that the number of the protruding block groups, the number of the protruding blocks in the protruding block group, and the arrangement position can be arranged according to requirements.

[0054] It should be noted that when the protruding blocks are arranged on the opposite two groove walls of the placing groove 211, the limiting body part 110 can be limited from multiple parts to improve the limiting effect on the busbar 100. Similarly, when multiple protruding blocks are arranged on each side groove wall of the placing groove 211, the multiple protruding blocks can cooperate with the limiting body part 110 to improve the limiting effect on the busbar 100. Of course, the multiple protruding blocks can be evenly spaced to further improve the limiting effect.

[0055] It should be noted that in order to facilitate the busbar 100 to be placed into the placing groove 211 through the limiting structure 230, a guide inclined surface can be arranged on the side of the protruding block away from the body part 110.

[0056] In one embodiment, please refer to Figure 5 The fixing plate 200 includes a fixing part 210 and an insulating part 220 (exemplarily separated by a dashed line), wherein:

[0057] The fixing part 210 is provided with a placing groove 211;

[0058] The insulating part 220 is connected with the fixing part 210, and the insulating part 220 can be folded to one side of the fixing part 210 relative to the fixing part 210 to insulate the body part 110 of the busbar 100 placed in the placing groove 211 from external structures.

[0059] Since the folded insulating part 220 is placed on one side of the busbar 100, the insulating part 220 can insulate the busbar 100 and external structures on this side. It should be noted that the fixing plate 200 provided by the embodiment of the application can avoid short circuit between the busbar 100 and external structures, thereby improving the safety performance of the battery pack; at the same time, the fixing plate 200 provided by the embodiment of the application can simplify the structure arrangement in the battery pack, so that other insulating structures do not need to be separately arranged in the battery pack, thereby reducing the assembly process and reducing the overall cost.

[0060] It should be noted that when the fixing plate 200 with the busbar 100 fixed is placed into the battery box, the insulating part 220 can insulate the busbar 100 from the side wall of the battery box, or the insulating part 220 can insulate the busbar 100 from other structures in the battery box.

[0061] In a specific embodiment, the connection between the insulating part 220 and the fixing part 210 is a weak part, so that the insulating part 220 can be folded relative to the fixing part 210 under the action of external force.

[0062] In another specific embodiment, the insulating part 220 can be a weak part as a whole to reduce the volume on the premise of playing an insulating effect.

[0063] In one embodiment, the fixing portion 210 and the insulation portion 220 are integrally formed.

[0064] It is to be noted that the integrally formed structure can simplify the manufacturing process, improve the manufacturing efficiency, and reduce the production cost.

[0065] In one embodiment, the insulation portion 220 is made of an insulating material. For example, the insulating material can be selected from one or more of polycarbonate (PC), polypropylene (PP), or a composite material of PC and ABS (acrylonitrile butadiene styrene copolymers).

[0066] In another embodiment, the insulation portion 220 is provided with an insulating structure. The insulating structure can be one or more of an insulating coating, an insulating film, or an insulating tape.

[0067] It is to be noted that since the busbar 100 is placed in the placement groove 211 of the fixing plate 200, an insulating structure can also be provided between the fixing portion 210 and the busbar 100, which can be wrapped around the fixing portion 210 and / or the surface of the fixing portion 210.

[0068] Of course, the fixing plate 200 as a whole can also be made of an insulating material. It is to be noted that when the fixing plate 200 as a whole is made of an insulating material, the insulation performance between the fixing plate 200 and the busbar 100 can be better improved, and the fixing plate 200 can also be used as an insulating plate to achieve insulation between the battery cell 300 and other structures.

[0069] Since the fixing portion 210 is a plate-shaped structure, in order to improve the connection strength between the insulation portion 220 and the fixing portion 210, in one embodiment, the insulation portion 220 is arranged on the long side of the fixing portion 210. Of course, the insulation portion 220 can also be arranged on the short side of the fixing portion 210 according to requirements, which will not be described here.

[0070] In one embodiment, as shown in Figure 5 The locking portion 240 is provided between the insulation portion 220 and the fixing portion 210 to fix the relative position of the insulation portion 220 and the fixing portion 210 after the insulation portion 220 is folded relative to the fixing portion 210.

[0071] It should be noted that after the insulation part 220 is folded, the locking part 240 locks the relative position of the insulation part 220 and the fixing part 210, so that a stable protection space can be formed between the fixing part 210 and the insulation part 220. Specifically, the locking part 240 can prevent the protection space from being opened by mistake, thereby improving the protection effect of the busbar 100 and the safety performance of the battery pack.

[0072] It should be noted that the locking part 240 can be provided only on the insulation part 220, or only on the fixing part 210, or on both the insulation part 220 and the fixing part 210. Of course, the locking part 240 can also be a separate locking structure, which will not be described here.

[0073] In a specific embodiment, the locking part 240 includes a clamping structure, wherein the clamping structure is provided on the edge of the insulation part 220, and the clamping structure is used to clamp the fixing part 210 away from the insulation part 220 after the insulation part 220 is folded. It should be noted that, Figure 5 The clamping structure in the above is shown in the form of a buckle.

[0074] It should be noted that the clamping structure is simple to set up and easy to operate, which can reduce the difficulty of assembly operation.

[0075] It should be understood that a plurality of buckles can be provided along the extension direction of the insulation part 220 to improve the fixing effect. The plurality of buckles can be uniformly or non-uniformly spaced, which can be set according to requirements, and will not be described here.

[0076] Of course, in order to facilitate the clamping operation of the clamping structure on the fixing part 210 and the insulation part 220, a guide surface can also be formed on the clamping structure.

[0077] For example, as Figure 3 shown, the clamping structure is provided with a guide surface for guiding the relative movement of the fixing part 210 and the insulation part 220, so as to facilitate the clamping between the insulation part 220 and the fixing part 210.

[0078] In another specific embodiment, the insulation part 220 and the fixing part 210 are connected by adhesion. It should be understood that the adhesive connection is simple to operate and can reduce the difficulty of assembly operation.

[0079] Please continue to refer to the structure shown in Figure 5 Since the fixing part 210 is a plate-shaped structure, in order to improve the connection strength between the insulation part 220 and the fixing part 210, in one embodiment, the insulation part 220 is provided on the long side of the fixing part 210. Of course, the insulation part 220 can also be provided on the short side of the fixing part 210 according to requirements, which will not be described here.

[0080] Please continue to refer toFigure 5 As shown in the structure, the fixing plate 200 provided by the embodiment of the present application further comprises an auxiliary insulation part 250, which is arranged at the short side of the fixing part 210. It is worth noting that the auxiliary insulation part 250 can be folded to one side of the fixing part 210 relative to the fixing part 210, so as to close the partial opening between the fixing part 210 and the insulation part 220.

[0081] It is to be noted that the auxiliary insulation part 250 can cooperate with the insulation part 220 to improve the protection effect on the busbar 100, so as to prevent the busbar 100 from short-circuiting with external structural parts.

[0082] In one embodiment, please continue to refer to Figure 5 As shown in the structure, the insulation part 220 can be provided with a notch 260 at the edge connected with the fixing part 210, so as to facilitate the conductive part connected with the busbar 100 to enter between the insulation part 220 and the fixing part 210.

[0083] The embodiment of the present application further provides a battery pack. As shown in the structure, Figures 1 to 5 The battery cell 300 comprises a plurality of battery cells 300 and the busbar assembly provided by any of the above technical solutions, and the busbar 100 in the busbar assembly is connected with two adjacent battery cells 300.

[0084] It is to be noted that in the battery pack provided by the embodiment of the present application, one busbar 100 can be placed in each placing groove 211 on the fixing plate 200 in the busbar assembly, and in application, the fixing plate 200 with a plurality of busbars 100 placed thereon can be directly taken out for assembly operation, so as to improve the assembly efficiency. Meanwhile, in the battery pack provided by the embodiment of the present application, the busbar assembly can make the busbar 100 have a certain sliding amount along the arrangement direction of the plurality of limiting grooves by arranging the elastic limiting structure 230 in the placing groove 211, so as to facilitate the adjustment of the relative position between the busbar 100 and the battery cell 300, thereby improving the connection accuracy of the busbar 100 and the battery cell 300.

[0085] In a specific embodiment, in each busbar 100, one connecting part 120 is connected with the electrode terminal 320 of one battery cell 300 of a first polarity, and the other connecting part 120 is connected with the electrode terminal 320 of another battery cell 300 of a second polarity, so as to realize the series connection operation between the adjacent battery cells 300.

[0086] It is to be noted that the polarity of the first polarity is opposite to that of the second polarity. For example, when the first polarity is positive, the second polarity is negative, and vice versa.

[0087] When the plurality of battery units 300 are placed in the battery box, the bottom plate of the battery box is taken as the bottom. In an embodiment, the busbar assembly is placed on the side of the plurality of battery units 300, and the extension direction of the fixed part 210 in the busbar assembly is parallel to the arrangement direction of the plurality of battery units 300.

[0088] It should be noted that when the busbar assembly is arranged on the side of the battery unit 300, the size of the entire battery pack can be reduced in the height direction (i.e., the direction perpendicular to the bottom surface of the battery box), thereby facilitating the miniaturization design of the battery pack.

[0089] In an embodiment, referring to Figure 6 , the battery unit 300 includes a square battery, and the square battery includes a battery shell 310 and an electrode terminal 320 protruding from the battery shell 310. The battery shell 310 includes two oppositely arranged battery major surfaces, a battery top surface and a battery bottom surface, and two battery side surfaces arranged therebetween. The two battery side surfaces are oppositely arranged, and each battery side surface connects the battery top surface and the battery bottom surface. The area of the battery major surface is larger than that of the battery side surface. Among the two oppositely arranged battery major surfaces, one battery major surface is provided with the electrode terminal 320, and the other battery major surface is provided with a recess.

[0090] As shown in the structure shown in Figure 6 , along the arrangement direction of the two major surfaces, the adjacent battery units 300 are stacked, and the electrode terminal 320 of one battery unit 300 is arranged in the recess of another battery unit 300, and the connecting part 120 of the busbar 100 extends into the recess and is connected with the electrode terminal 320.

[0091] It should be noted that the connecting part 120 of the busbar 100 extends into the recess of the battery shell 310, which can reduce the size of the busbar 100 beyond the side surface of the battery unit 300, thereby improving the space utilization of the battery pack.

[0092] In an embodiment, the battery unit 300 is provided with an auxiliary limiting structure, and the auxiliary limiting structure cooperates with the elastic limiting structure 230 to limit the busbar 100 along the arrangement direction of the plurality of battery units 300.

[0093] It should be noted that the auxiliary limiting structure arranged on the battery unit 300 can cooperate with the elastic limiting structure 230 to prevent the busbar 100 from shaking in the first direction. Specifically, the auxiliary limiting structure and the elastic limiting structure 230 can improve the stability of the busbar 100, thereby improving the alignment accuracy of the busbar 100 and the two electrode terminals 320, and improving the connection effect of the busbar 100 and the battery unit 300.

[0094] In a specific embodiment, for example, Figure 6As shown in region M on the right, among the multiple battery cells 300 arranged in sequence, the electrode terminal 320 of one battery cell 300 forms an auxiliary limiting structure. The auxiliary limiting structure abuts against the inner surface of a bend 130 of the busbar 100. At the same time, the elastic limiting structure 230 abuts against the inner surface of another bend 130 of the busbar 100 to limit the busbar 100.

[0095] It should be understood that this structural arrangement allows the busbar 100 to be bidirectionally limited along the first direction, thereby improving the connection accuracy between the busbar 100 and the battery unit 300.

[0096] It is worth noting that, such as Figure 6 As shown, an auxiliary limiting structure can be formed by using the insulating part at electrode terminal 320. Of course, other structures can also be used to form an auxiliary limiting structure, which will not be elaborated here.

[0097] In another specific embodiment, exemplarily, such as Figure 6 As shown in the left-hand region N, the auxiliary limiting structure abuts against the surface of a connecting portion 120 of the busbar 100 away from the bent portion 130. At the same time, the elastic limiting structure 230 abuts against the inner surface of the bent portion 130 of the busbar 100 near the auxiliary limiting structure to limit the busbar 100.

[0098] It should be understood that this structural arrangement can also allow the busbar 100 to be bidirectionally limited along the first direction, thereby improving the connection accuracy between the busbar 100 and the battery unit 300.

[0099] It is worth noting that, such as Figure 6 As shown, an auxiliary limiting structure can be formed by using the insulating part at electrode terminal 320. Of course, other structures can also be used to form an auxiliary limiting structure, which will not be elaborated here.

[0100] In one embodiment, please refer to... Figure 6 As shown in the structure, the battery housing 310 is also provided with a flange edge P, which is located at the connection between the battery large surface and the battery side surface of the electrode terminal 320, and the flange edge P extends outward from the battery large surface to between the two bends 130 of the busbar 100.

[0101] It should be noted that the flange edge P facilitates the installation and fabrication of the battery casing 310.

[0102] Of course, the flange P can also be used as an auxiliary limiting structure to cooperate with the elastic limiting structure 230 to limit the busbar 100. For example, the flange P of one battery unit 300 can abut against the inner surface of one bending portion 130 of the busbar 100, while the elastic limiting structure 230 abuts against the inner surface of another bending portion 130 of the busbar 100 to limit the busbar 100.

[0103] It should be understood that the structure is arranged such that the busbar 100 can be bidirectionally limited in the first direction, thereby improving the connection accuracy of the busbar 100 and the battery unit 300.

[0104] It should be noted that when the flange P is used as an auxiliary limiting structure, an insulation structure needs to be arranged between the flange P and the busbar 100 to prevent short circuit. For example, an insulation film, an insulation tape or an insulation layer can be attached to the flange P or even the surface of the battery housing 310.

[0105] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the application and including such

[0106] It should be understood that the present disclosure is not limited to the precise structures described above and shown in the drawings and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A busbar assembly comprising: The utility model relates to a kind of battery cell fixed plate and battery cell, including: Busbar (100) and fixed plate (200), wherein: The busbar (100) is used to connect two adjacent battery cells (300); The fixed plate (200) is provided with a plurality of placement grooves (211), and each placement groove (211) is placed with one busbar (100);Elastic limiting structure (212) is provided in the placement groove (211), and the elastic limiting structure (212) is in contact with the busbar (100) placed in the placement groove (211), to elastically limit the busbar (100) along the arrangement direction of a plurality of placement grooves (211), the placement groove (211) is a through groove, and the busbar is partially out of the placement groove (211) and connected with the battery cell; The busbar (100) includes a body portion (110) and two connecting portions (120), each connecting portion (120) is used to connect the electrode terminal (320) of one battery cell (300), and each connecting portion (120) is provided with a bending portion (130) between the body portion (110), and two bending portions (130) are oppositely arranged; The elastic limiting structure (212) is placed between two adjacent bending portions (130) and in contact with the side surface of one bending portion (130) towards the other bending portion (130).

2. The busbar assembly of claim 1, wherein, The elastic limiting structure (212) includes a support body (2121) and an elastic member (2122), wherein: The support body (2121) is fixed in position relative to the placement groove (211); One end of the elastic member (2122) is fixed to the support body (2121), and the other end extends away from the support body (2121) and is in contact with the bending portion (130).

3. The busbar assembly of claim 2, wherein, The support body (2121) has a groove, and the opening of the groove is located on the side of the support body (2121) towards the bending portion (130); One end of the elastic member (2122) is provided in the groove, and the other end protrudes out of the groove.

4. The busbar assembly of any of claims 1-3, wherein, The fixed plate (200) further includes a limiting structure (230) provided on the groove wall of the placement groove (211), and the limiting structure (230) is used to prevent the busbar (100) from coming out of the opening of the placement groove (211).

5. The busbar assembly of claim 4, wherein, The limiting structure (230) includes at least one protruding block group, the protruding block group includes a plurality of protruding blocks, and the plurality of protruding blocks are arranged at intervals.

6. The busbar assembly of claim 5, wherein, The protruding block is provided with a guide inclined surface, and the guide inclined surface is used to facilitate the placement of the busbar (100) in the placement groove (211).

7. The busbar assembly of any of claims 1-3, wherein, The fixed plate (200) includes a fixed portion (210) and an insulating portion (220), wherein: The fixed portion (210) is provided with the placement groove (211); The insulating portion (220) is connected with the fixed portion (210), and the insulating portion (220) can be folded to one side of the fixed portion (210) relative to the fixed portion (210), so as to isolate the busbar (100) placed in the placement groove (211) from external structures.

8. The busbar assembly of claim 7, wherein, The fixing plate (200) further comprises a locking portion (240) arranged between the fixing portion (210) and the insulation portion (220) to lock the relative position of the insulation portion (220) after being folded relative to the fixing portion (210).

9. The busbar assembly of claim 7, wherein, The insulation portion (220) is arranged on the long side of the fixing portion (210).

10. The busbar assembly of claim 9, wherein, Further comprising an auxiliary insulation portion (250) arranged on the short side of the fixing portion (210), the auxiliary insulation portion (250) can be folded to one side relative to the fixing portion (210) to close the partial opening between the insulation portion (220) and the fixing portion (210) after being folded.

11. A battery pack, characterized by The battery assembly comprises a plurality of battery units (300) and the busbar assembly according to any one of claims 1-10, and the busbar (100) in the busbar assembly is connected to two adjacent battery units (300).

12. The battery pack of claim 11, wherein, The busbar assembly is arranged on the side of the plurality of battery units (300), and the extension direction of the fixing plate (200) in the busbar assembly is parallel to the arrangement direction of the plurality of battery units (300).

13. The battery pack of claim 12, wherein, The battery unit (300) comprises a square battery, the square battery comprises a battery shell (310) and an electrode terminal (320) protruding from the battery shell (310), wherein the battery shell (310) comprises two oppositely arranged battery major surfaces, a battery top surface, a battery bottom surface and two battery side surfaces arranged between the two battery major surfaces; the two battery side surfaces are oppositely arranged, and each battery side surface connects the battery top surface and the battery bottom surface; one of the two oppositely arranged battery major surfaces is provided with the electrode terminal (320), and the other battery major surface is provided with a recess, and the recess extends to the battery side surface; along the arrangement direction of the two major surfaces, the adjacent battery units (300) are arranged in a stacked manner, and the electrode terminal (320) of one battery unit (300) is arranged in the recess of the other battery unit (300), and the connecting portion (120) of the busbar (100) extends into the recess and is connected with the electrode terminal (320).

14. The battery pack of claim 13, wherein, The battery unit (300) is provided with an auxiliary limiting structure, and the auxiliary limiting structure cooperates with the elastic limiting structure (212) to limit the busbar (100) along the arrangement direction of the plurality of battery units (300).

15. The battery pack of claim 14, wherein, In the plurality of sequentially arranged battery units (300), the electrode terminal (320) of one battery unit (300) forms the auxiliary limiting structure, wherein: The auxiliary limiting structure abuts against the inner surface of one bending portion (130) of the busbar (100), and the elastic limiting structure (212) abuts against the inner surface of another bending portion (130) of the busbar (100) to limit the busbar (100); or, The auxiliary limiting structure is abutted against one connecting portion (120) of the busbar (100) on the side surface away from the bending portion (130), and the elastic limiting structure (212) is abutted against the inner surface of the bending portion (130) on the side close to the auxiliary limiting structure to limit the busbar (100).

16. The battery pack of any one of claims 13-15, wherein, The battery case (310) is further provided with a flange edge located at the connection between the large face of the battery provided with the electrode terminal (320) and the side face of the battery, and the flange edge extends outward from the large face of the battery to between the two bending portions (130) of the busbar (100).

Images