Busbar, busbar assembly, battery module, battery pack and electric device

Abstract

The present application relates to the technical field of battery, especially to a busbar, a busbar support assembly and a battery module, the busbar is used for connecting to the tab of the battery, the busbar comprises an upper busbar and a lower busbar which are stacked vertically; wherein the busbar is configured to sandwich the connecting end of the tab between the upper busbar and the lower busbar, and the tab, the upper busbar and the lower busbar are fixed together. Through the above design, the present application uses double-layer design, which can ensure that the busbar has sufficient flow area, is suitable for large current charging and discharging, and is not easy to cause serious heating of the busbar, and has better safety.

Description

TECHNICAL FIELD

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

[0002] In the existing battery module, the lug of the battery and the busbar are usually connected in the following two schemes. In one connection scheme, the busbar is provided with a slot hole, the lug of the battery passes through the busbar via the slot hole and is bent and attached to the busbar, and the lug and the busbar are electrically connected by laser welding. However, the above-mentioned connection method needs to be provided with a slot hole on the busbar, which greatly reduces the overcurrent area of the busbar, and when large current charging and discharging is performed, the busbar is prone to serious heating, which poses a safety hazard. In another connection scheme, the lug and the busbar are connected in an embedded manner, that is, the top end of the lug is embedded in the groove of the busbar, or the top end of the lug is embedded between two adjacent busbars, and then the top end of the lug is welded to the busbar. However, the above-mentioned connection method has high requirements for the precision of the lug embedded in the busbar and the consistency of the lug length, the welding point area is small, the welding difficulty is high, and false welding and offset welding are prone to occur. SUMMARY

[0003] One of the main purposes of the present application is to overcome at least one of the defects of the prior art, and to provide a busbar suitable for realizing large current charging and discharging and having low welding difficulty.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] According to one aspect of the present application, a busbar is provided for connecting to a lug of a battery, wherein the busbar comprises an upper busbar and a lower busbar stacked one above the other; wherein the busbar is configured to have a connection end of the lug clamped between the upper busbar and the lower busbar, and the lug, the upper busbar and the lower busbar are fixed together.

[0006] According to one of the embodiments of the present application, the lower busbar is provided with a first slot hole, and the first slot hole penetrates the lower surface and the upper surface of the lower busbar to allow the connection end of the lug to pass through the first slot hole and be clamped between the upper busbar and the lower busbar.

[0007] According to one of the embodiments of the present application, in the horizontal direction, one end of the first slot hole is open to the edge of the lower busbar.

[0008] According to one of the embodiments of the present application, the upper surface of the lower busbar has a first region and a second region, the height of the first region is higher than the height of the second region, and the first region and the second region are connected via a step structure; wherein the busbar is configured to arrange a first tab and a second tab in the first region and the second region respectively, the thickness of the first tab is smaller than the thickness of the second tab, and the upper surface of the first tab and the upper surface of the second tab are flush when the first tab and the second tab are clamped between the upper busbar and the lower busbar.

[0009] According to one of the embodiments of the present application, the upper busbar is provided with an observation hole, the observation hole penetrates the upper surface and the lower surface of the upper busbar; wherein the connecting end of the tab is partially exposed to the observation hole when the connecting end of the tab is clamped between the upper busbar and the lower busbar.

[0010] According to one of the embodiments of the present application, the tab, the upper busbar and the lower busbar are welded together; or the tab, the upper busbar and the lower busbar are fixed together via a fixing member.

[0011] From the above technical solution, the advantages and positive effects of the busbar provided by the present application are as follows:

[0012] The busbar provided by the present application includes an upper busbar and a lower busbar stacked one above the other, the connecting end of the tab of the battery is clamped between the upper busbar and the lower busbar, and the tab, the upper busbar and the lower busbar are fixed together. Through the above design, the double-layer design is used to ensure that the busbar has sufficient flow area, is suitable for large-current charging and discharging, is not easy to cause serious heating of the busbar, and has better safety.

[0013] Another main purpose of the present application is to overcome at least one of the defects of the prior art, and to provide a busbar assembly using the above busbar.

[0014] To achieve the above purpose, the present application adopts the following technical solutions:

[0015] According to another aspect of the present application, a busbar assembly is provided, which includes a bracket and the busbar provided by the present application, the upper surface of the bracket is provided with a positioning structure, the busbar is fixed to the upper surface of the bracket via the positioning structure, the bracket is further provided with a second slot hole, the second slot hole penetrates the lower surface and the upper surface of the bracket, and the connecting end of the tab passes through the second slot hole and is clamped between the upper busbar and the lower busbar.

[0016] According to one of the embodiments of the present application, the second slot has a hole and a guide slot, the slot opening of the guide slot is on the lower surface of the bracket, the slot bottom of the guide slot is communicated with the hole, the width of the slot opening of the guide slot is greater than the width of the slot bottom, and the guide slot is used for guiding the tab when the tab enters the second slot.

[0017] According to one of the embodiments of the present application, the cross section of the guide slot is triangular, trapezoidal or arcuate.

[0018] According to one of the embodiments of the present application, the positioning structure includes a partition plate, the partition plate is arranged on the upper surface of the bracket, the partition plate encloses a receiving cavity, and the bus bar is received in the receiving cavity.

[0019] According to one of the embodiments of the present application, the inner side of the partition plate is provided with a clamping protrusion, the clamping protrusion is clamped with the bus bar to fix the bus bar in the receiving cavity.

[0020] According to one of the embodiments of the present application, in the horizontal direction, the upper bus bar is partially staggered with the lower bus bar, or the width of the lower bus bar is greater than the width of the upper bus bar, so that the upper surface of the lower bus bar is partially exposed to the upper bus bar; wherein the clamping protrusion is clamped on the exposed part of the upper surface of the lower bus bar.

[0021] According to one of the embodiments of the present application, the inner side of the partition plate is provided with a positioning protrusion, the edges of the upper bus bar and the lower bus bar are respectively provided with a positioning slot corresponding to the position of the positioning protrusion, and the positioning protrusion is received in the positioning slot to position the bus bar in the receiving cavity.

[0022] According to one of the embodiments of the present application, the lower bus bar is provided with a first slot, the first slot penetrates the lower surface and the upper surface of the lower bus bar, so that the connecting end of the tab passes through the first slot and is clamped between the upper bus bar and the lower bus bar; wherein the position of the positioning protrusion corresponds to the position of one end of the first slot, the slot opening of the positioning slot of the lower bus bar is opened on the edge of the lower bus bar, and the slot bottom of the positioning slot is communicated with the end of the first slot.

[0023] According to one of the embodiments of the present application, the bracket includes one or more receiving cavities; wherein: at least one receiving cavity is used for independently receiving at least one bus bar; and / or, at least one receiving cavity is used for jointly receiving at least one bus bar with at least one receiving cavity of another bracket.

[0024] From the above technical solutions, the busbar assembly provided by the application has the following advantages and positive effects:

[0025] The busbar assembly provided by the application can be suitable for large-current charging and discharging, and the welding difficulty of the busbar and the tab is low.

[0026] Another main purpose of the application is to overcome at least one of the defects of the prior art, and to provide a battery module using the above busbar assembly.

[0027] To achieve the above purpose, the application adopts the following technical solutions:

[0028] According to another aspect of the application, a battery module is provided, which comprises a battery and the busbar assembly provided by the application, the battery has a tab, the bracket is arranged on the battery, and the connecting end of the tab passes through the second slot hole and is clamped between the upper busbar and the lower busbar.

[0029] According to one embodiment of the application, the battery module comprises a plurality of busbar assemblies, the plurality of busbar assemblies comprise A-type assemblies and B-type assemblies; in the horizontal direction, the shapes of the A-type assemblies and the B-type assemblies are symmetrical with the first direction as the axis of symmetry, and the A-type assemblies and the B-type assemblies are arranged alternately along the second direction perpendicular to the first direction.

[0030] From the above technical solutions, the battery module provided by the application has the following advantages and positive effects:

[0031] The battery module provided by the application can be suitable for large-current charging and discharging, and the welding difficulty of the busbar and the tab is low.

[0032] Another main purpose of the application is to overcome at least one of the defects of the prior art, and to provide a battery pack using the above battery module.

[0033] To achieve the above purpose, the application adopts the following technical solutions:

[0034] According to another aspect of the application, a battery pack is provided, which comprises the battery module provided by the application.

[0035] From the above technical solutions, the battery pack provided by the application has the following advantages and positive effects:

[0036] The battery pack provided by the application can be suitable for large-current charging and discharging, and the welding difficulty of the busbar and the tab is low.

[0037] Another major objective of the present invention is to overcome at least one of the defects of the prior art described above and to provide an electrical device employing the aforementioned battery pack.

[0038] To achieve the above objectives, the present invention adopts the following technical solution:

[0039] According to another aspect of the present invention, an electrical device is provided, wherein the battery pack proposed in the present invention is included.

[0040] As can be seen from the above technical solution, the advantages and positive effects of the electrical equipment proposed in this invention are as follows:

[0041] The electrical equipment proposed in this invention, by adopting the battery pack proposed in this invention, enables the battery pack to be suitable for high-current charging and discharging, and the welding difficulty of the busbar and the tab is relatively low. Attached Figure Description

[0042] Various objects, features, and advantages of the invention will become more apparent from the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are merely illustrative of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0043] Figure 1 This is a three-dimensional structural schematic diagram of a busbar from one perspective, according to an exemplary embodiment.

[0044] Figure 2 yes Figure 1 The diagram shows a three-dimensional structure of the busbar from another perspective.

[0045] Figure 3 yes Figure 1 The diagram shown is a three-dimensional exploded view of the busbar.

[0046] Figure 4 yes Figure 3 A schematic diagram of the three-dimensional structure of the lower busbar is shown;

[0047] Figure 5 yes Figure 4 A side view of the lower busbar is shown.

[0048] Figure 6 This is a three-dimensional structural schematic diagram of a bus assembly from one perspective, according to an exemplary embodiment.

[0049] Figure 7 yes Figure 6 A three-dimensional structural diagram of the busbar assembly from another perspective is shown.

[0050] Figure 8 yesFigure 6 perspective view of a partial structure of the busbar assembly;

[0051] Figure 9 is Figure 6 perspective view of the bracket from one viewing angle;

[0052] Figure 10 is Figure 6 perspective view of the bracket from another viewing angle;

[0053] Figure 11 is a partial perspective view of a battery module according to an exemplary embodiment;

[0054] Figure 12 is a perspective view of a battery module according to another exemplary embodiment;

[0055] Figure 13 is Figure 12 perspective exploded view of the battery module;

[0056] Figure 14 is Figure 13 top view of a partial structure;

[0057] Figure 15 is Figure 14 top view of a plurality of brackets;

[0058] Figure 16 is Figure 14 perspective view of a partial structure;

[0059] Figure 17 is Figure 16 perspective exploded view of two brackets;

[0060] Figure 18 is Figure 16 perspective view of a combined structure of two brackets from one viewing angle;

[0061] Figure 19 is Figure 16 perspective view of a combined structure of two brackets from another viewing angle.

[0062] Reference signs are explained as follows:

[0063] 100. busbar; 220. second slot hole;

[0064] 110. upper busbar; 221. hole portion;

[0065] 111. observation hole; 222. guide groove portion;

[0066] 112. positioning groove; 300. battery;

[0067] 120. lower busbar; 310. tab;

[0068] 121. first slot; 311. first tab;

[0069] 122. first region; 312. second tab;

[0070] 123. second region; 313. connecting end;

[0071] 124. step structure; a. A-type assembly;

[0072] 125. exposed portion; b. B-type assembly;

[0073] 126. positioning groove; d1. interval;

[0074] 200. bracket; d2. interval;

[0075] 210. positioning structure; h1. height;

[0076] 211. partition; h2. height;

[0077] 212. engaging protrusion; X. first direction;

[0078] 213. positioning protrusion; Y. second direction. DETAILED DESCRIPTION

[0079] Embodiments embodying the principles of the application will now be described in detail, by way of example only. The application can vary, however, without departing from the scope of the application and thus, the illustration and description thereof are intended to be illustrative only, and not restrictive.

[0080] In the following description of various example embodiments of the application, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration various example structures, systems, and steps in which aspects of the application can be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps can be utilized and structural and functional modifications can be made without departing from the scope of the present application. Also, while the terms "top," "bottom," "front," "back," and the like can be used in this specification to describe various example features and elements of the application, these terms are used herein as a shorthand notation, and in no way limit or restrict the scope of the application described herein to a particular orientation in space. Any language in this specification asserting that the present application encompasses or covers a feature or element occurring in the description or drawing therefore encompasses such a feature or element occurring in any orientation.

[0081] Reference is made toFigure 1 Fig. 1 represents a perspective view of the busbar 100 according to an embodiment of the present application, which shows a perspective view of the busbar 100 according to an embodiment of the present application. In the exemplary embodiment, the busbar 100 according to an embodiment of the present application is applied to a soft package battery. It is easy for those skilled in the art to understand that various modifications, additions, substitutions, deletions or other changes can be made to the following specific embodiments in order to apply the relevant design of the present application to other types of battery modules, and these changes are still within the scope of the principle of the busbar 100 according to an embodiment of the present application.

[0082] As shown in Fig. 1, in an embodiment of the present application, the busbar 100 according to an embodiment of the present application is used to connect to the tab 310 of the battery 300. For reference, Fig. 2 represents a perspective view of the busbar 100 according to an embodiment of the present application, which shows a perspective view of the busbar 100 according to an embodiment of the present application from another perspective; Figure 1 Figures 2 to 5 Figure 2 Fig. 3 represents a perspective exploded view of the busbar 100 according to an embodiment of the present application, which shows a perspective exploded view of the busbar 100 according to an embodiment of the present application; Figure 3 Figure 4 Fig. 4 represents a perspective view of the lower busbar 120 according to an embodiment of the present application, which shows a perspective view of the lower busbar 120 according to an embodiment of the present application; Figure 5 Fig. 5 represents a side view of the lower busbar 120 according to an embodiment of the present application, which shows a side view of the lower busbar 120 according to an embodiment of the present application. In addition, for the convenience of understanding and description, Figs. 6 and 7 respectively show the combination of the partial structure of the tab 310 of the battery 300 and the busbar 100 according to an embodiment of the present application. The structure, connection mode and functional relationship of the main components of the busbar 100 according to an embodiment of the present application will be described in detail below in combination with the above-mentioned figures. Figures 1 to 3 As shown in Fig. 1, in an embodiment of the present application, the busbar 100 according to an embodiment of the present application includes the upper busbar 110 and the lower busbar 120 stacked one above the other. On this basis, the connection end 313 of the tab 310 of the battery 300 can be clamped between the upper busbar 110 and the lower busbar 120, i.e. the connection end 313 is arranged on the upper surface of the lower busbar 120 with one side surface (e.g. the lower surface after being bent), and the lower busbar 110 is arranged on the other side surface (e.g. the upper surface after being bent) of the connection end 313. Moreover, the connection end 313 of the tab 310, the upper busbar 110 and the lower busbar 120 are fixed together. Through the above design, the busbar 100 according to an embodiment of the present application can ensure sufficient flow area by using a double-layer design, which is suitable for large current charging and discharging, and is not easy to cause serious heating of the busbar 100, and has better safety.

[0083] Figures 1 to 3

[0084] ​​​​​In an embodiment of the present application, the connecting end 313 of the tab 310, the upper busbar 110 and the lower busbar 120 can be fixed together via welding. Further, the welding process described above can be but not limited to ultrasonic welding. Through the above design, the present application provides the welding position of the tab 310 as the area between the upper busbar 110 and the lower busbar 120, the welding point area is larger, the welding difficulty is lower, and it is not easy to produce false welding and offset welding. In some embodiments, the connecting end 313 of the tab 310, the upper busbar 110 and the lower busbar 120 can also be fixed together by a fixing member, which can be but not limited to a bolt, and is not limited to the present embodiment.

[0085] As shown in Figures 2 to 4 In an embodiment of the present application, the lower busbar 120 can be provided with a first slot hole 121, the first slot hole 121 penetrating the lower surface and the upper surface of the lower busbar 120, and the first slot hole 121 can allow the connecting end 313 of the tab 310 to pass through the first slot hole 121 and be clamped between the upper busbar 110 and the lower busbar 120. Through the above design, the present application can realize that the tab 310 directly extends from below the busbar 100 into the upper busbar 110 and the lower busbar 120 by using the first slot hole 121, which is beneficial to reduce the bending extension path of the tab 310, avoid the tab 310 being exposed too much outside the busbar 100, and ensure the structural stability.

[0086] As shown in Figure 2 and Figure 3 Based on the design that the lower busbar 120 is provided with the first slot hole 121, in an embodiment of the present application, at least one first slot hole 121 can simultaneously allow two tabs 310 to pass through, and the connecting ends 313 of the two tabs 310 passing through the same first slot hole 121 can be bent towards opposite directions respectively, so as to ensure that the connecting ends 313 of the two tabs 310 can be relatively independently contacted with the upper busbar 110 and the lower busbar 120. Through the above design, the present application can reduce the number of first slot holes 121 required to be provided on the lower busbar 120, so that the adjacent first slot holes 121 have a larger spacing, and the area between the adjacent first slot holes 121 can be used as a welding area, thereby increasing the area of the welding area and reducing the welding difficulty. In some embodiments, at least one or all of the first slot holes 121 can also only allow one tab 310 to pass through, and is not limited to the present embodiment.

[0087] As shown in Figures 2 to 4As shown, based on the design that the first slot hole 121 is opened on the lower bus bar 120, in an embodiment of the present application, in the horizontal direction, one end of the first slot hole 121 can be opened on the edge of the lower bus bar 120. Through the above design, in the process of assembling the tab 310 and the lower bus bar 120, the lower bus bar 120 can be pushed relative to the tab 310 in the horizontal direction, so that the tab 310 enters the first slot hole 121 through the opening of the first slot hole 121 on the edge of the lower bus bar 120 in the horizontal direction. Accordingly, it is not necessary to adopt the installation mode of up and down, which further reduces the assembly difficulty of the lower bus bar 120 and the tab 310. In some embodiments, the first slot hole 121 can also be a closed slot hole structure, that is, the first slot hole 121 can not be opened on the edge of the lower bus bar 120, and it is not limited to the present embodiment.

[0088] As shown, Figures 3 to 5 In an embodiment of the present application, the upper surface of the lower bus bar 120 can have a first area 122 and a second area 123, the height h1 of the first area 122 can be higher than the height h2 of the second area 123, and the first area 122 and the second area 123 can be transitioned through a step structure 124. On this basis, the bus bar 100 can use the first area 122 and the second area 123 to respectively set the first tab 311 and the second tab 312, the thickness of the first tab 311 is smaller than the thickness of the second tab 312, and accordingly, when the first tab 311 and the second tab 312 are clamped between the upper bus bar 110 and the lower bus bar 120, the upper surface of the first tab 311 and the upper surface of the second tab 312 are flush. Through the above design, the present application can be further applied to the connection of two kinds of tabs 310 with different thicknesses, for example, the positive and negative tabs 310 of the soft package battery usually adopt different thicknesses, and accordingly, it can be ensured that the upper surface of the upper bus bar 110 can be closely attached to the first tab 311 and the second tab 312, so that after the tabs 310 with different heights are bent and attached to the upper surface of the lower bus bar 120, the upper surfaces of the tabs 310 with different heights are consistent in height.

[0089] As shown, Figure 1 and Figure 3As shown, in an embodiment of the present application, the upper busbar 110 can be provided with an observation hole 111 penetrating the upper surface and the lower surface of the upper busbar 110. In this way, when the connecting end 313 of the tab 310 is clamped between the upper busbar 110 and the lower busbar 120, the connecting end 313 can be partially exposed to the observation hole 111. Through the above design, the operator or the detection mechanism can observe the end edge of the tab 310 in the observation hole 111 to identify whether the tab 310 is bent in place, and the position of the welding line can be located to prevent false welding and missed welding, thereby further improving the yield. For example, when the operator can see the tab 310 in the observation hole 111, or the visual system of the monitoring mechanism identifies the tab 310, it can be determined that the tab 310 is bent in place. Conversely, when the tab 310 is not seen or identified, it can be determined that the tab 310 is not installed in place and needs to be repaired. In addition, after determining that the tab 310 is installed in place, the observation hole 111 can be used as a positioning hole, and laser welding can be performed at a position away from the observation hole 111, thereby avoiding false welding and missed welding.

[0090] It should be noted that the busbars shown in the drawings and described in the specification are only a few examples of many busbars that can employ the principles of the present application. It should be clearly understood that the principles of the present application are by no means limited to any detail or any component of the busbars shown in the drawings or described in the specification.

[0091] In summary, the busbar 100 according to the present application includes an upper busbar 110 and a lower busbar 120 stacked one above the other, the connecting end 313 of the tab 310 of the battery 300 is clamped between the upper busbar 110 and the lower busbar 120, and the tab 310, the upper busbar 110 and the lower busbar 120 are fixed together. Through the above design, the busbar 100 according to the present application can ensure that the busbar 100 has sufficient current-carrying area and is suitable for large current charging and discharging, and is less likely to cause serious heating of the busbar 100, thereby being safer.

[0092] Based on the above detailed description of the several exemplary embodiments of the busbar 100 according to the present application, the following will describe several exemplary embodiments of the busbar assembly according to the present application.

[0093] Referring to Figure 6, which representatively shows a perspective structural schematic view of the busbar assembly proposed by the present application in one view. In the exemplary embodiment, the busbar assembly proposed by the present application is illustrated by taking application to a soft package battery as an example. It is easy for those skilled in the art to understand that various modifications, additions, substitutions, deletions or other changes can be made to the following specific embodiments in order to apply the relevant design of the present application to other types of battery modules, and these changes are still within the scope of the principle of the busbar assembly proposed by the present application.

[0094] As shown in Figure 6 , in an embodiment of the present application, the busbar assembly proposed by the present application comprises a bracket 200 and the busbar 100 proposed by the present application and described in detail in the above embodiments. For reference, Figures 7 to 10 , Figure 7 , which representatively shows a perspective structural schematic view of the busbar assembly in another view; Figure 8 , which representatively shows a perspective structural schematic view of part of the structure of the busbar assembly; Figure 9 , which representatively shows a perspective structural schematic view of the bracket 200 in one view; Figure 10 , which representatively shows a perspective structural schematic view of the bracket 200 in another view. The structure, connection mode and functional relationship of each main component of the busbar assembly proposed by the present application will be described in detail below in combination with the above drawings.

[0095] As shown in Figures 6 to 10 , in an embodiment of the present application, the upper surface of the bracket 200 is provided with a positioning structure 210, the busbar 100 is fixed to the upper surface of the bracket 200 via the positioning structure 210, the bracket 200 is further provided with a second slot hole 220, the second slot hole 220 penetrates through the lower surface and the upper surface of the bracket 200, and the connecting end 313 of the tab 310 passes through the second slot hole 220 and is clamped between the upper busbar 110 and the lower busbar 120. On this basis, the present application can melt the upper busbar 110, the tab 310 and part of the lower busbar 120 (the lower busbar 120 is not completely melted in the thickness direction) by laser, so as to fuse the above three parts, and realize series and parallel electrical connection of the battery module. Through the above design, the present application can make the upper busbar 110 not need to be provided with a slot hole for the tab 310 to pass through, that is, the upper busbar 110 can retain a larger flow area, thereby having a better flow capacity, and the busbar 100 generates less heat when the battery module is subjected to large current charging and discharging, thereby avoiding the safety risk caused by too high temperature of the busbar 100. In addition, the lower busbar 120 is partially melted in the thickness direction during laser welding, thereby supporting the melted metal of the upper layer, preventing the loss of the melted metal to form a cavity, and preventing the melted metal from dropping on the battery 300 to damage the battery 300, thereby improving the welding quality and improving the yield.

[0096] As shown in Figure 8 the first slots 121, the second slots 220 can have the same number as the first slots 121, and the positions of the second slots 220 can correspond to the positions of the first slots 121 one by one. On this basis, when any first slot 121 simultaneously provides two pole tabs 310 to pass through, the second slot 220 corresponding to the first slot 121 can also simultaneously provide the two pole tabs 310 to pass through. Furthermore, whether the first slot 121 is open at one end of the lower bus bar 120 or not, the second slot 220 can remain a normal slot structure, that is, the second slot 220 is not open at the edge of the bracket 200. Accordingly, in the process of assembling the pole tabs 310, the bracket 200 can be placed on the battery 300 from top to bottom, and in this process, the pole tabs 310 pass through the second slots 220 from bottom to top so that the connecting ends 313 of the pole tabs 310 protrude above the upper surface of the bracket 200, and then the lower bus bar 120 is pushed into (or placed from top to bottom) relative to the pole tabs 310 along the horizontal direction, so that the pole tabs 310 pass through the openings of the first slots 121 at the edge of the lower bus bar 120 along the horizontal direction to enter the first slots 121 (or the pole tabs 310 pass through the first slots 121 from bottom to top).

[0097] As shown in Figure 9 and Figure 10 In an embodiment of the present application, the second slot 220 can have a hole part 221 and a guide groove part 222. Specifically, the slot opening of the guide groove part 222 is open at the lower surface of the bracket 200, and the groove bottom of the guide groove part 222 is communicated with the hole part 221. Among them, the width of the slot opening of the guide groove part 222 is greater than the width of the groove bottom, so that the guide groove part 222 can guide the pole tab 310 when the pole tab 310 enters the second slot 220 (from bottom to top through the second slot 220). Through the above design, the present application can guide the pole tab 310 by using the guide groove part 222 in the assembly process, so that the pole tab 310 is more easily passed through the second slot 220, further reducing the assembly difficulty.

[0098] Specifically, based on the design that the first slot hole 121 is used for passing two tab ears 310 at the same time, in the assembly process of the tab ear 310 and the lower bus bar 120, when each tab ear 310 passes through the first slot hole 121, the flexible connection part (connected between the connection end 313 and the cell of the battery 300) of the tab ear 310 is guided by the guide groove part 222 of the second slot hole 220 to naturally bend in the direction of the hole part 221 (i.e. the first slot hole 121), and after each tab ear 310 passes through the second slot hole 220 and the first slot hole 121, it is bent in the opposite direction of the above bending direction of the connection part. After the tab ear 310 is bent, the bending position of each tab ear 310 is only a single layer of tab ear 310, that is, the welding position of all tab ears 310 is only a single layer of tab ear 310, which can reduce the welding difficulty.

[0099] As shown in Figure 10 , based on the design that the second slot hole 220 has a guide groove part 222, in an embodiment of the present application, the cross section of the guide groove part 222 can be roughly trapezoidal. Among them, the "long bottom" of the trapezoid corresponds to the notch of the guide groove part 222 on the lower surface of the bracket 200, and the "short bottom" of the trapezoid corresponds to the groove bottom of the guide groove part 222 communicated with the hole part 221. Through the above design, the present application can further optimize the guiding function of the guide groove part 222, and at the same time, it is beneficial to simplify the structure and facilitate production and processing. In some embodiments, the cross section of the guide groove part 222 can also be other shapes, for example but not limited to triangular, arcuate, etc., and is not limited to the present embodiment.

[0100] As shown in Figures 6 to 10 , in an embodiment of the present application, the positioning structure 210 of the bracket 200 can include a partition plate 211. Specifically, the partition plate 211 is arranged on the upper surface of the bracket 200, and the partition plate 211 can enclose a containing cavity, and the bus bar 100 can be contained in the containing cavity. Through the above design, the present application can contain the bus bar 100 by using the containing cavity enclosed by the partition plate 211, and improve the installation strength and stability of the bus bar 100 and the bracket 200. At the same time, the present application can use the partition plate 211 to separate the adjacent bus bars 100, avoid short circuit between the adjacent bus bars 100, and ensure the stability of the series and parallel electrical connection of the battery module.

[0101] As shown in Figure 7 and Figure 9As shown, the positioning structure 210 of the bracket 200 comprises the design of the partition plate 211, and in an embodiment of the present application, the inner side of the partition plate 211 is provided with a clamping protrusion 212 which can be clamped with the busbar 100, thereby fixing the busbar 100 in the accommodating cavity and realizing the relative positioning of the busbar 100 and the bracket 200 in the vertical direction. Through the above design, the present application can further improve the installation strength and stability of the busbar 100 and the bracket 200, and is convenient for assembly.

[0102] Referring to Figure 1 , based on the design that the inner side of the partition plate 211 is provided with the clamping protrusion 212, in an embodiment of the present application, in the horizontal direction, the upper busbar 110 and the lower busbar 120 can be partially staggered, or the width of the lower busbar 120 can be greater than the width of the upper busbar 110, so that the upper surface of the lower busbar 120 is partially exposed to the upper busbar 110, for example Figure 1 or Figure 7 the exposed part 125 as shown. On this basis, as shown in Figure 7 , the clamping protrusion 212 can be clamped on the exposed part 125 of the upper surface of the lower busbar 120.

[0103] As shown in Figure 6 and Figure 8 , while referring to Figures 1 to 4 , based on the design of the positioning structure 210 of the bracket 200, the inner side of the partition plate 211 can be provided with a positioning protrusion 213. Correspondingly, the edges of the upper busbar 110 and the lower busbar 120 are provided with positioning grooves 112, 126 corresponding to the positions of the positioning protrusion 213, for example, the positioning groove 112 of the upper busbar 110 and the positioning groove 126 of the lower busbar 120. Accordingly, the positioning protrusion 213 can be accommodated in the above-mentioned positioning grooves 112, 126, thereby positioning the busbar 100 in the accommodating cavity, and realizing the relative positioning of the busbar 100 and the bracket 200 in the horizontal direction. Through the above design, the present application can further improve the installation strength and stability of the busbar 100 and the bracket 200, and is convenient for assembly.

[0104] Referring to Figure 4As shown, based on the design that the inner side of the partition plate 211 is provided with the positioning protrusion 213, in an embodiment of the present application, when the lower bus bar 120 is provided with the first slot hole 121, the position of the positioning protrusion 213 can correspond to the position of one end of the first slot hole 121. On this basis, the slot opening end of the positioning slot 126 of the lower bus bar 120 can be opened at the edge of the lower bus bar 120, and the slot bottom end of the positioning slot 126 can be communicated with the end of the first slot hole 121. In other words, when the lower bus bar 120 is provided with both the first slot hole 121 and the positioning slot 126, the first slot hole 121 can be opened at one end of the edge of the lower bus bar 120, and the opened end can be deformed (for example, the area of the opening is increased) to form the positioning slot 126. Through the above design, the present application can further simplify the structural complexity and simplify the process. At the same time, the present application can realize the plugging of the positioning protrusion 213 to the opening of one end of the first slot hole 121 by using the design that the positioning protrusion 213 is accommodated in the positioning slot 126, avoid the tab 310 from being pulled out from the opening of one end of the first slot hole 121 in the horizontal direction, and further improve the structural stability. In some embodiments, when the lower bus bar 120 is provided with both the first slot hole 121 and the positioning slot 126, the positioning slot 126 can also not be communicated with the first slot hole 121, that is, the positioning slot 126 and the first slot hole 121 can be staggered on the circumference of the lower bus bar 120, or at least one positioning slot 126 can be communicated with one first slot hole 121, which are not limited to the present embodiment.

[0105] It should be noted that in some embodiments, the support 200 can include one or more accommodation cavities, and at least one of the accommodation cavities can be used to independently accommodate at least one bus bar. Alternatively, at least one of the accommodation cavities can be used to jointly accommodate at least one bus bar with at least one accommodation cavity of another support, for example Figures 16 to 19 As described above, according to the difference between independent accommodation and joint accommodation with the accommodation cavities of other supports, the partition plate 211 surrounding the accommodation cavity can be an open structure, or a closed structure, which are not limited to the present embodiment.

[0106] It should be noted that the bus bar assembly shown in the drawings and described in the present specification is only a few examples of many bus bar assemblies that can employ the principles of the present application. It should be clearly understood that the principles of the present application are by no means limited to any details or any components of the bus bar assembly shown in the drawings or described in the present specification.

[0107] As described above, the bus bar assembly proposed in the present application can be adapted for large current charging and discharging by using the bus bar 100 proposed in the present application, and the welding difficulty of the bus bar 100 and the tab 310 is low.

[0108] Based on the detailed description of several exemplary embodiments of the busbar 100 and busbar assembly proposed in this invention above, several exemplary embodiments of the battery module proposed in this invention will be described below.

[0109] See Figure 11 The illustration shows a partial three-dimensional structural diagram of the battery module proposed in this invention. In this exemplary embodiment, the battery module proposed in this invention is described using a pouch battery as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this invention to other types of battery modules, and these changes are still within the scope of the principles of the battery module proposed in this invention.

[0110] like Figure 11 As shown, in one embodiment of the present invention, the battery module proposed in this invention includes multiple batteries 300 and a busbar assembly proposed in this invention. Specifically, the battery 300 has tabs 310, the support 200 of the busbar assembly is disposed on the battery 300, and the connecting end 313 of the tab 310 passes through the second slot 220 of the support 200 and is sandwiched between the upper busbar 110 and the lower busbar 120. With the above design, the present invention is suitable for high-current charging and discharging, and the welding difficulty between the busbar 100 and the tab 310 is relatively low.

[0111] Based on the design of a first slot 121 in the lower busbar 120 for two tabs 310 to pass through simultaneously, in one embodiment of the present invention, the first slot 121 can be aligned with the mating surfaces between two adjacent batteries 300, thereby facilitating the bending and extension of the two tabs 310 of the two batteries 300 through the same first slot 121 with shorter paths.

[0112] See Figures 12 to 19 , Figure 12 The diagram shows a three-dimensional structural schematic of a battery module that embodies the principles of the present invention in another exemplary embodiment. Figure 13 The diagram shows a representative three-dimensional exploded view of the battery module. Figure 14 China representatively shows Figure 13 A top view of part of the structure is shown; Figure 15 The top view of multiple supports 200 is shown in the image. Figure 16 China representatively shows Figure 14 A three-dimensional structural diagram of part of the structure is shown; Figure 17 The diagram shows a representative three-dimensional exploded view of the two supports 200; Figure 18 The diagram shows a three-dimensional view of the combined structure of the two supports 200 from one perspective. Figure 19Fig. 6 schematically shows a perspective view of the combined structure of two supports 200 from another perspective.

[0113] As shown in Figures 12 to 15 In an embodiment of the present application, the battery module can include a plurality of busbar assemblies, and the busbar assemblies can include A-type assemblies A and B-type assemblies B. In this case, in the horizontal direction, the A-type assemblies A and the B-type assemblies B are symmetrical with respect to the first direction X as the axis of symmetry, and the A-type assemblies A and the B-type assemblies B are arranged alternately along the second direction Y perpendicular to the first direction X. Through the above design, the battery module with different series numbers can be obtained by periodically increasing or decreasing the number of A-type assemblies A or B-type assemblies B, without the need to redesign the specific configuration of the support 200 of the busbar assembly. Accordingly, the unitized structure design of the busbar 100 support 200 is realized, which is beneficial to mass production and flexible selection for different series-parallel schemes, and can reduce product cost and development cycle.

[0114] As shown in Figures 16 to 19 In an embodiment of the present application, based on the design that the plurality of busbar assemblies include A-type assemblies A and B-type assemblies B, the support 200 of each A-type assembly A or B-type assembly B has two accommodating cavities in the first direction X, and the two accommodating cavities belonging to the same support 200 are respectively open toward the two sides of the second direction Y. For example, when the positioning structure 210 of the support 200 includes a partition plate 211, the front projection pattern of the partition plate 211 on the upper surface of the support 200 can be approximately "S" shaped, and in some embodiments, the front projection pattern of the partition plate 211 can also be approximately "ㄣ" shaped. Accordingly, for two adjacent supports 200 along the second direction Y, the openings of the respective one accommodating cavities of the two supports 200 along the first direction X are arranged opposite to each other, and the openings of the respective other accommodating cavities of the two supports 200 along the first direction X are arranged away from each other, i.e., the partition plates 211 of the two adjacent supports 200 are arranged symmetrically with respect to the first direction X as the axis of symmetry. Among them, for the two adjacent supports 200, the two accommodating cavities with opposite openings and belonging to different supports 200 respectively accommodate one busbar 100, i.e., the busbar 100 is arranged across the two adjacent supports 200.

[0115] As shown in Figure 14Based on the above design of the plurality of busbar assemblies including the A-type assembly A and the B-type assembly B, in an embodiment of the present application, when the inner side surface of the partition plate 211 of the bracket 200 is provided with the positioning protrusion 213, at least two positioning protrusions 213 can be provided for positioning each busbar 100. On this basis, for the busbars 100 on both sides of the central axis (for example, extending along the second direction Y) of the battery module, the spacing of the at least two positioning protrusions 213 for positioning the busbars 100 on the two sides can be set to have a large difference, for example Figure 14 The spacing d1 and the spacing d2 shown in the middle. Through the above design, the lower busbar 120 located on both sides of the central axis cannot be installed at the wrong position, which plays a foolproof effect, and further helps to improve the assembly efficiency and yield of the battery module.

[0116] It should be noted that the battery module shown in the drawings and described in the specification is only a few examples of many battery modules that can employ the principles of the present application. It should be clearly understood that the principles of the present application are by no means limited to any detail or any component of the battery module shown in the drawings or described in the specification.

[0117] In summary, the battery module proposed by the present application can be adapted for large current charging and discharging by using the busbar assembly proposed by the present application, and the welding difficulty of the busbar 100 and the tab 310 is low.

[0118] Based on the above detailed description of the several exemplary embodiments of the battery module proposed by the present application, the following will describe an exemplary embodiment of the battery pack proposed by the present application.

[0119] In an embodiment of the present application, the battery pack proposed by the present application includes the battery module proposed by the present application and described in detail in the above embodiment.

[0120] It should be noted that the battery pack shown in the drawings and described in the specification is only a few examples of many battery packs that can employ the principles of the present application. It should be clearly understood that the principles of the present application are by no means limited to any detail or any component of the battery pack shown in the drawings or described in the specification.

[0121] In summary, the battery pack proposed by the present application can be adapted for large current charging and discharging by using the battery module proposed by the present application, and the welding difficulty of the busbar and the tab is low.

[0122] Based on the above detailed description of the exemplary embodiment of the battery pack proposed by the present application, the following will describe an exemplary embodiment of the power consumption equipment proposed by the present application.

[0123] In an embodiment of the present application, the power consuming device comprises the battery pack according to the present application and as described in detail in the above embodiment.

[0124] It should be noted that the power consuming device shown in the drawings and described in the specification is merely a few examples of many kinds of power consuming devices that can employ the principles of the present application. It should be clearly understood that the principles of the present application are by no means limited to any details or any components of the power consuming device shown in the drawings or described in the specification.

[0125] In summary, the power consuming device according to the present application, by employing the battery pack according to the present application, can make the battery pack suitable for large current charging and discharging, and the welding difficulty of the bus bar and the tab is low.

[0126] The exemplary embodiments of the bus bar, the bus bar assembly, the battery module, the battery pack and the power consuming device according to the present application are described and / or illustrated in detail above. However, the embodiments of the present application are not limited to the specific embodiments described herein, but rather, each of the embodiments of the present application are meant to cover all alternatives, modifications and equivalents thereof. It should be noted that the components of each embodiment of the present application and / or the steps of each method of the present application can be used independently of other components or steps and that all combinations of components and / or steps are considered to be part of the present application. In addition, the use of the terms "one" and "the" and "said" are intended to cover any and all combinations of the elements identified as such. The use of the term "comprising" is intended to mean that the embodiments of the present application also "consist of" and / or "consist essentially of" the components as such. In addition, the terms "first", "second", "third", etc. are meant to be labels used for distinguishing between certain elements and are not a limitation as to the positions, amounts, and / or types of elements described and / or shown in this disclosure. Furthermore, the terms "include", "including", and "have" and "has" are intended to be inclusive and mean that something can be added.

[0127] While the bus bar, the bus bar assembly, the battery module, the battery pack and the power consuming device according to the present application have been described in terms of the various specific embodiments, it will be recognized that the embodiments of the present application can differ from the embodiments specifically described.

Claims

1. A busbar for connection to a tab of a battery, characterized in that, The busbar comprises an upper busbar and a lower busbar stacked one above the other; wherein the busbar is configured to have the connecting end of the tab clamped between the upper busbar and the lower busbar, and the tab, the upper busbar and the lower busbar are fixed together; the lower busbar is provided with a first slot hole, the first slot hole penetrates the lower surface and the upper surface of the lower busbar, so that the connecting end of the tab passes through the first slot hole and is clamped between the upper busbar and the lower busbar; the upper surface of the lower busbar has a first area and a second area, the height of the first area is higher than the height of the second area, and the first area and the second area are transitioned via a step structure; the busbar is configured to set a first tab and a second tab in the first area and the second area respectively, the thickness of the first tab is smaller than the thickness of the second tab, and the upper surface of the first tab and the upper surface of the second tab are flush when the first tab and the second tab are clamped between the upper busbar and the lower busbar; in the horizontal direction, the upper busbar is partially misaligned with the lower busbar, or the width of the lower busbar is greater than the width of the upper busbar, so that the upper surface of the lower busbar is partially exposed to the upper busbar.

2. The busbar of claim 1, wherein In the horizontal direction, one end of the first slot hole is opened at the edge of the lower busbar.

3. The busbar of claim 1, wherein, The upper busbar is provided with an observation hole, the observation hole penetrates the upper surface and the lower surface of the upper busbar; wherein when the connecting end of the tab is clamped between the upper busbar and the lower busbar, the connecting end of the tab is partially exposed to the observation hole.

4. The busbar of claim 1, wherein: The tab, the upper busbar and the lower busbar are welded and fixed together; or The tab, the upper busbar and the lower busbar are fixed together via a fixing member.

5. A busbar assembly, characterized in that A bracket and the busbar of any one of claims 1-4 are included, the upper surface of the bracket is provided with a positioning structure, the busbar is fixed to the upper surface of the bracket via the positioning structure, the bracket is further provided with a second slot hole, the second slot hole penetrates the lower surface and the upper surface of the bracket, and the connecting end of the tab passes through the second slot hole and is clamped between the upper busbar and the lower busbar.

6. The busbar assembly of claim 5, wherein, The second slot hole has a hole part and a guide groove part, one end of the slot of the guide groove part is opened at the lower surface of the bracket, one end of the groove bottom of the guide groove part is communicated with the hole part, the width of one end of the slot of the guide groove part is greater than the width of one end of the groove bottom, and the guide groove part is used to guide the tab when the tab enters the second slot hole.

7. The busbar assembly of claim 6, wherein, The cross section of the guide groove part is triangular, trapezoidal or arc-shaped.

8. The busbar assembly of claim 5, wherein, The positioning structure comprises a partition plate, the partition plate is arranged on the upper surface of the bracket, and the partition plate encloses a containing cavity, and the busbar is contained in the containing cavity.

9. The busbar assembly of claim 8, wherein, The inner side surface of the partition plate is provided with a clamping protrusion, the clamping protrusion is clamped and matched with the busbar to fix the busbar in the containing cavity.

10. The busbar assembly of claim 9, wherein, The engaging protrusion engages with an exposed portion of the upper surface of the lower busbar.

11. The busbar assembly of claim 8, wherein, An inner side of the partition plate is provided with a positioning protrusion, edges of the upper busbar and the lower busbar are respectively provided with a positioning groove corresponding to a position of the positioning protrusion, and the positioning protrusion is accommodated in the positioning groove to position the busbar in the accommodating cavity.

12. The busbar assembly of claim 11, wherein, The lower busbar is provided with a first slot hole penetrating the lower surface and the upper surface of the lower busbar, so that the connecting end of the tab passes through the first slot hole and is clamped between the upper busbar and the lower busbar; wherein the position of the positioning protrusion corresponds to the position of one end of the first slot hole, and one end of the slot opening of the positioning groove of the lower busbar is open at the edge of the lower busbar, and one end of the groove bottom of the positioning groove is communicated with the end of the first slot hole.

13. The busbar assembly of claim 8, wherein, The support includes one or more of the accommodating cavities; wherein: At least one of the accommodating cavities is used to independently accommodate at least one of the busbars; and / or At least one of the accommodating cavities is used to jointly accommodate at least one of the busbars with at least one of the accommodating cavities of another support.

14. A battery module, characterized by The battery module includes a plurality of the busbar assemblies, and the plurality of busbar assemblies include A-type assemblies and B-type assemblies; wherein, in a horizontal direction, shapes of the A-type assemblies and the B-type assemblies are symmetrical with a first direction as a symmetry axis, and the A-type assemblies and the B-type assemblies are alternately arranged along a second direction perpendicular to the first direction.

15. The battery module of claim 14, wherein, The battery module includes the battery module of claim 14 or 15.

16. A battery pack, characterized by The battery pack includes the battery pack of claim 16.

17. An electrical device, characterized by ​

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