A busbar and battery module

Abstract

The present invention provides a busbar and a battery module, wherein the busbar includes an insulating bracket and a copper busbar, the insulating bracket is provided with a plurality of limiting grooves at intervals, the copper busbar includes a plurality of copper sheets connected to each other, and the plurality of copper sheets are inserted into the plurality of limiting grooves one by one; a first fixing member is provided on the first side wall and the second side wall of the limiting groove, a second fixing member adapted to the first fixing member is provided on the third side wall and the fourth side wall of the copper sheet, and the copper sheet can be fixed in the limiting groove by the cooperation of the first fixing member and the second fixing member. Through the cooperation of the first fixing member and the second fixing member, the copper sheet can be limited in the limiting groove and will not slide or fall, thereby improving the stability of the busbar; the copper sheet is correspondingly connected to the pole ears of the battery cell, and the separation of the limiting groove can avoid the contact between the pole ears of adjacent battery cells, thereby reducing the risk of short circuit of the battery pack and improving the safety of using the busbar.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium-ion batteries, and in particular to a busbar and a battery module. Background Art

[0002] Lithium-ion energy storage system (Battery Energy Storage System, BESS) is the most widely used energy storage system. In comparison, the advantages of BESS are: first, low cost, mature technology, and high charging and discharging multiples; second, good modularity and can be used as a distributed energy storage device.

[0003] Currently, when manually installing the busbar, the copper busbar usually needs to be placed into the busbar bracket from above. The copper busbar can easily fall off and even cause a short circuit in the battery module.

[0004] It can be seen that the installation structure of the busbar in the prior art has poor safety. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a busbar and a battery module, which solves the problem of poor safety of the installation structure of the busbar in the prior art.

[0006] In order to achieve the above-mentioned object, in a first aspect, an embodiment of the present invention provides a busbar, which is applied to a battery module, characterized in that it includes an insulating bracket and a copper busbar, wherein a plurality of limiting grooves are arranged at intervals on the insulating bracket, and the copper busbar includes a plurality of copper sheets connected to each other, and the plurality of copper sheets are inserted into the plurality of limiting grooves one by one;

[0007] The limiting groove includes a first side wall and a second side wall that are arranged opposite to each other, and a first fixing piece is arranged on each of the first side wall and the second side wall. The copper sheet includes a third side wall and a fourth side wall that are arranged opposite to each other, and a second fixing piece that is adapted to the first fixing piece is arranged on each of the third side wall and the fourth side wall. The copper sheet can be fixed in the limiting groove by the cooperation between the first fixing piece and the second fixing piece.

[0008] Optionally, the first fixing member is a buckle, and the second fixing member is a slot adapted to the buckle; and / or, the first fixing member is a slot, and the second fixing member is a buckle corresponding to the slot.

[0009] Optionally, a through slot is formed on the bottom wall of the limiting groove and passes through the busbar in the thickness direction, and the tabs of the battery cells of the battery module are electrically connected to the copper sheet through the through slot.

[0010] Optionally, the limiting groove includes a first end and a second end that are relatively arranged, the first end is open, and the second end is provided with a limiting plate, and the copper sheet can be inserted into the limiting groove from the first end and be limited in the limiting groove by the limiting plate.

[0011] Optionally, the copper sheet includes a pointed third end, and the third end is an end of the copper sheet close to the second end.

[0012] Optionally, the limiting plate includes a first limiting plate and a second limiting plate, the first limiting plate is connected to the first side wall, the second limiting plate is connected to the second side wall, and an angle formed between the first limiting plate and the second limiting plate is adapted to the third end.

[0013] Optionally, the insulating bracket has a plurality of columns spaced apart from each other, and the busbar is fixed to the battery pack of the battery module and / or to the cover plate of the battery module through the columns.

[0014] Optionally, a plurality of limiting ribs are provided on the insulating bracket, and the busbar is fixed to the flexible circuit board of the battery module via the limiting ribs.

[0015] Optionally, a positive and negative electrode fool-proofing component is provided on the side of the insulating bracket facing the copper busbar.

[0016] In a second aspect, an embodiment of the present invention further provides a battery module, comprising the bus provided in the first aspect of the embodiment of the present invention.

[0017] One of the above technical solutions has the following advantages or beneficial effects:

[0018] The embodiment of the present invention provides a busbar and a battery module, wherein the busbar includes an insulating bracket and a copper busbar, a plurality of limiting grooves are arranged at intervals on the insulating bracket, and the copper busbar includes a plurality of copper sheets connected to each other, and the plurality of copper sheets are inserted into the plurality of limiting grooves one by one; a first fixing member is arranged on the first side wall and the second side wall of the limiting groove, a second fixing member adapted to the first fixing member is arranged on the third side wall and the fourth side wall of the copper sheet, and the copper sheet can be fixed in the limiting groove by the cooperation of the first fixing member and the second fixing member. Through the cooperation of the first fixing member and the second fixing member, the copper sheet can be confined in the limiting groove and will not slide or fall, thereby improving the stability of the busbar; the copper sheet is correspondingly connected to the pole ears of the battery cell, and the separation of the limiting groove can avoid the contact between the pole ears of adjacent battery cells, thereby reducing the risk of short circuit of the battery pack and improving the safety of using the busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An exploded diagram of a bus provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of an insulating bracket in a busbar provided by an embodiment of the present invention;

[0021] Figure 3 A partial schematic diagram of an insulating bracket in a busbar provided by an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of a copper sheet in a busbar provided by an embodiment of the present invention;

[0023] Figure 5 One of the schematic diagrams of installing a busbar and a battery pack provided by an embodiment of the present invention;

[0024] Figure 6 A second schematic diagram of the installation of a bus bar and a battery pack provided by an embodiment of the present invention;

[0025] Figure 7 An exploded diagram of a battery module provided by an embodiment of the present invention;

[0026] Figure 8 A three-dimensional schematic diagram of a battery module provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 6 As shown, an embodiment of the present invention provides a bus bar 100 .

[0029] like Figure 1 As shown, the busbar 100 includes an insulating support 110 and a copper busbar 120. Figure 2 As shown, a plurality of limiting grooves 111 are arranged at intervals on the insulating bracket 110, and the copper busbar 120 includes a plurality of copper sheets 121 connected to each other, and the plurality of copper sheets 121 are inserted into the plurality of limiting grooves 111 one by one;

[0030] like Figure 3 and Figure 4As shown, the limiting groove 111 includes a first side wall and a second side wall arranged opposite to each other, and a first fixing member 1111 is provided on each of the first side wall and the second side wall. The copper sheet 121 includes a third side wall and a fourth side wall arranged opposite to each other, and a second fixing member 1211 adapted to the first fixing member 1111 is provided on each of the third side wall and the fourth side wall. The copper sheet 121 can be fixed in the limiting groove 111 by the cooperation between the first fixing member 1111 and the second fixing member 1211.

[0031] In the embodiment of the present invention, the busbar 100 includes an insulating support 110 and a copper busbar 120. Figure 2 As shown, the insulating bracket 110 is provided with a plurality of limiting grooves 111 at intervals, and each limiting groove 111 is separated by a baffle; Figure 1 As shown, the copper busbar 120 includes a plurality of copper sheets 121 connected to each other, and each copper sheet 121 is inserted into a corresponding limiting groove 111 .

[0032] When the bus 100 is applied to a battery module, the bus 100 can be attached to the pole ears of the battery pack 200 in the battery module, and the pole ears of the battery cells in the battery pack 200 can be connected to the copper sheet 121 one by one and led out uniformly. The separation of the limiting grooves 111 can avoid contact between the pole ears of adjacent battery cells, thereby reducing the risk of short circuit in the battery pack 200.

[0033] At the same time, if Figure 3 As shown, a first fixing member 1111 is provided on the first side wall and the second side wall of the limiting groove 111, and correspondingly, as shown in FIG. Figure 4 As shown, the third side wall and the fourth side wall of the copper sheet 121 are provided with a second fixing member 1211 adapted to the first fixing member 1111. The first fixing member 1111 may be as follows: Figure 3 The buckle shown in the figure may also be a limiting rib or other fixing member. The second fixing member 1211 may be as follows Figure 4 The groove shown may also be a through hole, or other fixing members, which is not limited here.

[0034] In this way, the copper sheets 121 can be inserted into the limiting grooves 111 one by one, and then through the cooperation of the first fixing member 1111 and the second fixing member 1211, the copper sheets 121 can be limited in the limiting grooves 111 and will not slide or fall, thereby improving the stability of the bus 100 and further improving the safety of the battery module using the bus 100.

[0035] Optionally, the first fixing member 1111 is a buckle, and the second fixing member 1211 is a slot adapted to the buckle; and / or, the first fixing member 1111 is a slot, and the second fixing member 1211 is a buckle corresponding to the slot.

[0036] In this embodiment, the first fixing member 1111 and the second fixing member 1211 can be fixed by means of a buckle and a card slot, wherein the buckle can be made of a material with a certain elasticity. For example, in the process of inserting the copper sheet 121 into the limiting slot 111, the buckle will not cause any obstruction to the copper sheet 121, and when the copper sheet 121 reaches a certain position, the buckle can be fixed with the card slot.

[0037] Specifically, there are at least three implementation methods: the first one is, Figure 3 and Figure 4 As shown, the first fixing member 1111 is a buckle, and the second fixing member 1211 is a slot adapted to the above-mentioned buckle; the second type, the first fixing member 1111 is a slot, and the second fixing member 1211 is a buckle adapted to the above-mentioned slot; the third type, the first fixing member 1111 and the second fixing member 1211 both include a buckle and a slot. It can be understood that the buckles and the slots may be arranged at intervals on the first side wall and the second side wall of the limiting groove 111, and the slots are arranged on the third side wall and the fourth side wall of the copper sheet 121 at positions corresponding to the above-mentioned buckles, and the buckles are arranged at positions corresponding to the above-mentioned slots.

[0038] Optionally, a through slot 1112 penetrating the thickness direction of the busbar 100 is formed on the bottom wall of the limiting slot 111 , and the tabs of the battery cells of the battery module pass through the through slot 1112 to be electrically connected to the copper sheet 121 .

[0039] Since the busbar 100 is applied to a battery module, the positive and negative tabs of the battery cells in the battery module can be connected to the copper sheet of the busbar 100 and then led out uniformly.

[0040] In this embodiment, Figure 3 As shown, a through groove 1112 is provided on the insulating bracket 110 corresponding to the bottom of the limiting groove 111, and combined with Figure 5 and Figure 6 As shown, when the copper sheet 121 is confined in the limiting groove 111, the tabs of the battery cells in the battery pack 200 can directly pass through the through groove 1112 to connect with the copper sheet 121, which can reduce the wiring inside the battery module and simplify the internal structure of the battery module; in addition, the tabs of the battery cells in the battery pack 200 pass through the through groove 1112 one by one and extend into the limiting groove 111. For thinner battery cells, the tabs of adjacent battery cells can be further prevented from contacting, thereby further improving the safety of the battery module.

[0041] Optionally, the limiting groove 111 includes a first end and a second end that are relatively arranged, the first end is open, and the second end is provided with a limiting plate, and the copper sheet 121 can be inserted into the limiting groove 111 from the first end and limited in the limiting groove 111 by the limiting plate.

[0042] In this embodiment, Figure 3As shown, the limiting groove 111 includes a first end at the bottom and a second end at the top. The copper sheet 121 can be inserted into the limiting groove 111 from the bottom. A limiting plate for limiting the position of the copper sheet 121 is provided at the second end of the limiting groove 111, which can limit the position of the copper sheet 121 in the limiting groove 111.

[0043] Furthermore, the copper sheet 121 includes a pointed third end, and the third end is an end of the copper sheet close to the second end.

[0044] In this embodiment, in order to facilitate the copper sheet 121 to Figure 3 The copper sheet 121 is inserted into the limiting groove 111 at the bottom as shown, and the end of the copper sheet 121 close to the second end of the limiting groove 111 can be designed as follows Figure 4 The pointed shape shown.

[0045] Furthermore, the limiting plate includes a first limiting plate 1113 and a second limiting plate 1114, the first limiting plate 1113 is connected to the first side wall, the second limiting plate 1114 is connected to the second side wall, and the angle formed between the first limiting plate 1113 and the second limiting plate 1114 is adapted to the third end.

[0046] In this embodiment, on the basis of making the end of the copper sheet 121 close to the second end of the limiting groove 111 into a pointed shape, the limiting plate in the limiting groove 111 can be designed to be a shape that matches the pointed shape of the copper sheet, specifically, as Figure 3 As shown, the limiting plate includes a first limiting plate 1113 and a second limiting plate 1114, wherein the first limiting plate 1113 is connected to the first side wall of the limiting groove 111, and the second limiting plate 1114 is connected to the second side wall of the limiting groove 111, and the first limiting plate 1113 and the second limiting plate 1114 can be inclined to form an angle, and the angle of the angle can be adapted to the tip of the copper sheet 121.

[0047] Optionally, a plurality of columns 112 are spaced apart on the insulating bracket 110 , and the busbar 100 is fixed to the battery pack of the battery module and / or to the cover plate of the battery module through the columns 112 .

[0048] In this embodiment, a third fixing member for fixing the busbar 100 may also be provided on the insulating bracket 110. Figure 2 As shown, a plurality of columns 112 may be arranged at intervals on one side of the limiting groove 111. The number of the columns 112 may be two, three, four or other numbers. The arrangement of the columns 112 may be as follows: Figure 2 As shown, the four columns are symmetrically distributed at the four corners, and can also be arranged side by side, without any limitation here.

[0049] In this embodiment, the busbar 100 may be fixed by the column 112. Specifically, the busbar 100 may be fixed to the battery pack of the battery module by the column 112, or may be fixed to the cover plate of the battery module by the column 112.

[0050] The two opposite sides of the insulating bracket are represented as follows Figure 2 The front side and Figure 2 The rear side shown. In some embodiments, a portion of the columns 112 may extend toward the front side, and this portion of the columns 112 may be used to fix the busbar 100 to the cover plate of the battery module, while another portion of the columns 112 may extend toward the rear side to be used to fix the busbar 100 to the battery pack of the battery module; in some embodiments, all the columns 112 may penetrate the thickness direction of the insulating bracket and extend toward the front side and the rear side respectively, so that the busbar 100 can be fixed to the battery pack and the cover plate of the battery module at the same time through the same columns 112. It is understandable that the number and form of the columns 112 are not limited to this, and no limitation is made here.

[0051] Optionally, a plurality of limiting ribs 113 are provided on the insulating bracket 110 , and the busbar 100 is fixed to the flexible circuit board of the battery module via the limiting ribs 113 .

[0052] When the battery module requires a signal acquisition flexible circuit board for signal acquisition, the signal acquisition pins of the flexible circuit board can be connected to the positive and negative pole ears of the battery cell through the bus 100.

[0053] In this embodiment, in order to facilitate the fixing between the busbar 100 and the flexible circuit board, a limiting rib 113 is provided on the insulating bracket 110 of the busbar 100. Figure 2 As shown. The limiting rib 113 can be configured as follows Figure 2 The mesh structure shown is convenient for connection with the connector of the flexible printed circuit board and improves stability. The limiting ribs 113 can also be arranged at intervals, which is not limited here.

[0054] Optionally, a positive and negative electrode foolproofing assembly 114 is provided on the side of the insulating bracket 110 facing the copper bus 120 .

[0055] In this embodiment, a foolproof component 114 for indicating the positive and negative poles of the battery module is provided on the side of the insulating bracket 110 facing the copper bus 120. Figure 1As shown, on the side of the insulating bracket 110 facing the copper bus 120, a negative electrode foolproof mark indicating the negative electrode is set on the right side, and a positive electrode foolproof mark indicating the positive electrode is set on the left side. In this way, when assembling the bus 100, the positive and negative electrode foolproof components 114 can be used to connect the positive and negative pole ears of the battery cell. When the battery module is actually used, the positive and negative electrode foolproof components 114 can also be used to correctly connect external devices to avoid the situation where the positive and negative poles are connected in reverse and short circuit occurs, thereby improving the safety of the bus 100 and the battery module.

[0056] To summarize, the busbar 100 provided in the embodiment of the present invention comprises an insulating bracket 110 and a copper busbar 120, wherein a plurality of limiting grooves 111 are arranged at intervals on the insulating bracket 110, and the copper busbar 120 comprises a plurality of copper sheets 121 connected to each other, and the plurality of copper sheets 121 are inserted into the plurality of limiting grooves 111 in a one-to-one correspondence; a first fixing member 1111 is arranged on the first side wall and the second side wall of the limiting groove 111, and a second fixing member 1211 matched with the first fixing member 1111 is arranged on the third side wall and the fourth side wall of the copper sheet 121, and the copper sheet 121 can be fixed in the limiting groove 111 by the cooperation of the first fixing member 1111 and the second fixing member 1211. Through the cooperation of the first fixing member 1111 and the second fixing member 1211, the copper sheet 121 can be confined in the limiting groove 111 and will not slide or fall, thereby improving the stability of the bus 100; the copper sheet 121 is correspondingly connected to the pole ears of the battery cell, and the separation of the limiting groove 111 can avoid contact between the pole ears of adjacent battery cells, reducing the risk of short circuit of the battery pack 200 and improving the safety of using the bus 100.

[0057] like Figure 7 As shown, an embodiment of the present invention further provides a battery module.

[0058] The battery module includes the above Figures 1 to 6 The embodiment shown provides all the technical features of the busbar 100, and can realize the above Figures 1 to 6 To avoid repetition, all technical effects that can be achieved by the bus 100 provided in the illustrated embodiment will not be described in detail here.

[0059] The structure and assembly process of the battery module are described below with a complete embodiment:

[0060] The battery module comprises a battery pack, a bus bar and a flexible circuit board;

[0061] Wherein, the battery pack is composed of a plurality of battery components stacked and connected with each other, and each battery component includes a carrier sheet, a battery cell and foam stacked in sequence; the pole ears of each battery cell are located on both sides; the carrier sheet is an aluminum sheet that can dissipate heat, and the battery cell is fixed by a thermally conductive adhesive, and the first and second sides of the carrier sheet relative to each other are bent toward the battery cell to form a bending portion, and the bending portion can protect the battery cell. At the same time, the carrier arranged on the bending portion can limit the position of the battery cell on the carrier sheet, thereby improving the stability between the battery cell and the carrier sheet, and a buckle is arranged on the bending portion, and each battery component can be stacked and connected through the buckles on the respective carrier sheets; an avoidance structure for avoiding the pole ears of the battery cell is arranged on the third and fourth sides of the carrier sheet relative to each other, so as to prevent the pole ears of the battery cell from contacting with the carrier sheet and causing a short circuit; the foam is attached to the side of the battery cell facing away from the carrier sheet, and the foam is elastic. The foam can be pre-compressed to have a certain amount of compression, and the elastic force generated by the compression of the foam can prevent the battery cell from expanding. Even if the battery cell expands, the compression of the foam can provide a certain expansion space;

[0062] The busbar comprises an insulating bracket and a copper busbar, and the two busbars are respectively fixed on the first side and the second side of the battery pack through the columns on the insulating bracket; a plurality of limiting grooves are provided on the insulating bracket, and the copper busbar comprises a plurality of copper sheets connected to each other, and the head of each copper sheet is designed with a sharp angle; the limiting groove comprises a first end and a second end opposite to each other, and the heads of the copper sheets on the copper busbar can be inserted into the limiting groove from the first end of the limiting groove in a one-to-one correspondence, and the second end of the limiting groove is provided with a first limiting plate and a second limiting plate, and the angle formed between the first limiting plate and the second limiting plate is adapted to the sharp-angled head of the copper sheet; a buckle is provided on the side wall of each limiting groove, and the buckle can further fix the copper sheet; a through groove is provided at the bottom of the limiting groove, and the pole ears of the battery cells in the battery pack can pass through the through groove to connect with the copper sheet;

[0063] Among them, the flexible circuit board includes a first side, a second side and a connector. After the first side and the second side are bent toward the battery pack, the flexible circuit board is in a "J" shape, and the positive and negative electrode signal collection nickel sheets on the first side and the second side are respectively fixed on the two opposite sides of the battery pack through a bus, and the first side and the second side are electrically connected through the connector; the positive electrode signal collection nickel sheet on the first side and / or the second side is connected to the positive electrode ear of the battery cell, and the negative electrode signal collection nickel sheet on the first side and / or the second side is connected to the negative electrode ear of the battery cell to collect voltage signals, temperature signals and other information of the positive and negative electrodes of the battery cell, and transmit them to the BMS for processing; the fixing parts on the flexible circuit board can cooperate with the limiting ribs on the bus to achieve fixation;

[0064] Combination Figure 5 and Figure 7 As shown, the assembly process of the above battery module is as follows:

[0065] 1) Assemble the battery assembly 210, fix the battery cell 212 on the carrier sheet 211 by means of thermally conductive adhesive, and further fix it by means of a carrier on the carrier sheet 211, and attach the pre-compressed foam 213 on the battery cell 212;

[0066] 2) Assembling the battery pack 200, stacking and connecting the assembled multiple battery assemblies 210 through the buckle structure on the carrier sheet 211 of each battery assembly;

[0067] 3) Assemble the busbar 100, assemble the busbar 100 to the first side and the second side of the battery pack 200 from the side, adjust the position of the busbar 100 to ensure that the tabs of the battery cells 212 in the battery pack 200 are inserted into the limiting grooves of the busbar 100 one by one and connected to the copper sheet, and then fix the busbar 100 to the battery pack through the columns on the busbar 100;

[0068] 4) Assembling the flexible circuit board 300, first covering the third side surface of the battery pack 200 with a Mylar sheet 400 to insulate the battery pack 200 from the flexible circuit board 300; then, connecting the flexible circuit board 300 across the battery pack 200 from the direction of the third side surface of the battery pack 200, wherein the first side edge and the second side edge of the flexible circuit board 300 are fixed by the limiting ribs on the bus 100, and the positive signal collection nickel sheet and the negative signal collection nickel sheet on the flexible circuit board 300 are respectively connected to the copper sheet, and then the first side edge and the second side edge are pressed tightly by the insulating pressing sheet;

[0069] 5) Assembling the insulating sleeve 500, and arranging the insulating sleeve 500 outside the fixed battery pack 200 and the flexible circuit board 300;

[0070] 6) Assemble the housing 600 and arrange a metal housing made of aluminum material outside the insulating housing 500;

[0071] 7) Assemble the front cover 710 and the rear cover 720, wherein the front cover 710 is correspondingly mounted on the first side of the battery pack 200, and the rear cover 720 is correspondingly mounted on the second side of the battery pack 200. During assembly, the positive and negative electrode foolproofing components on the busbar 100 are aligned with the positive and negative electrode foolproofing components on the front cover 710 and the rear cover 720;

[0072] 8) Assemble the front fixing plate 810 and the rear fixing plate 820. Weld the aluminum alloy front fixing plate 810 and the rear fixing plate 820 to the housing 600 respectively, and fix them to the outer package that matches the battery module through the bolt holes on the front fixing plate 810 and the rear fixing plate 820. After the assembly, the battery module can be Figure 8 shown.

[0073] In summary, the embodiment of the present invention provides a busbar and a battery module, wherein the busbar includes an insulating bracket and a copper busbar, a plurality of limiting grooves are arranged at intervals on the insulating bracket, and the copper busbar includes a plurality of copper sheets connected to each other, and the plurality of copper sheets are inserted into the plurality of limiting grooves one by one; a first fixing member is arranged on the first side wall and the second side wall of the limiting groove, a second fixing member adapted to the first fixing member is arranged on the third side wall and the fourth side wall of the copper sheet, and the copper sheet can be fixed in the limiting groove by the cooperation of the first fixing member and the second fixing member. Through the cooperation of the first fixing member and the second fixing member, the copper sheet can be confined in the limiting groove and will not slide or fall, thereby improving the stability of the busbar; the copper sheet is correspondingly connected to the pole ears of the battery cell, and the separation of the limiting groove can avoid the contact between the pole ears of adjacent battery cells, thereby reducing the risk of short circuit of the battery pack and improving the safety of using the busbar.

[0074] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A busbar, applied to a battery module, It is characterized in that It comprises an insulating support and a copper bar, wherein a plurality of limiting grooves are arranged at intervals on the insulating support, and the copper bar comprises a plurality of copper sheets connected to each other, and the plurality of copper sheets are inserted into the plurality of limiting grooves one by one; The limiting groove includes a first side wall and a second side wall that are arranged opposite to each other, and a first fixing piece is arranged on each of the first side wall and the second side wall. The copper sheet includes a third side wall and a fourth side wall that are arranged opposite to each other, and a second fixing piece that is adapted to the first fixing piece is arranged on each of the third side wall and the fourth side wall. The copper sheet can be fixed in the limiting groove by the cooperation of the first fixing piece and the second fixing piece. The limiting groove includes a first end and a second end that are arranged opposite to each other, and the first end is provided with an opening, and the second end is provided with a limiting plate. The copper sheet can be inserted into the limiting groove from the first end and passed through The copper sheet is limited in the limiting groove by the limiting plate; the copper sheet includes a pointed third end, and the third end is an end of the copper sheet close to the second end; the limiting plate includes a first limiting plate and a second limiting plate, the first limiting plate is connected to the first side wall, the second limiting plate is connected to the second side wall, and the angle formed between the first limiting plate and the second limiting plate is adapted to the third end; the first fixing member is a buckle, and the second fixing member is a slot adapted to the buckle; and / or the first fixing member is a slot, and the second fixing member is a buckle corresponding to the slot.

2. The busbar according to claim 1, It is characterized in that A through slot is formed on the bottom wall of the limiting groove and runs through the thickness direction of the busbar, and the tabs of the battery cells of the battery module pass through the through slot and are electrically connected to the copper sheet.

3. The busbar according to claim 1, It is characterized in that The insulating bracket has a plurality of columns spaced apart from each other, and the busbar is fixed to the battery pack of the battery module and / or the cover plate of the battery module through the columns.

4. The busbar according to claim 1, It is characterized in that The insulating bracket is provided with a plurality of limiting ribs, and the busbar is fixed to the flexible circuit board of the battery module through the limiting ribs.

5. The busbar according to claim 1, It is characterized in that The side of the insulating bracket facing the copper busbar is provided with positive and negative electrode foolproof components.

6. A battery module, It is characterized in that Comprising the busbar as claimed in any one of claims 1 to 5.

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