Battery pack integrated busbar and forming method thereof

Abstract

The invention discloses a battery pack integrated busbar and a forming method thereof, the battery pack integrated busbar comprises a blister support, a busbar and an FPC, the busbar and the FPC are arranged on the blister support, the blister support comprises a support body and a riveting column integrally formed with the support body, and a sinking groove coaxial with the riveting column is formed in the front face of the support body. The busbar has the advantages that by arranging the sinking groove, the tie bar can be located in the sinking groove, when the busbar and the plastic uptake support are assembled, the lower end face of the busbar can abut against the end face of the plastic uptake support instead of abutting against the tie bar, the busbar and the plastic uptake support are prevented from forming an interval due to the tie bar, and then explosion welding during subsequent busbar and cell welding is avoided. The boss with the thickness the same as the depth of the sinking groove is arranged, it is guaranteed that the boss corresponds to the sinking groove, the strength of the sinking groove can be guaranteed, meanwhile, the sinking groove and the boss can be achieved while the support body is extruded, and machining is convenient.

Description

Technical Field

[0001] The present invention relates to the field of electronic devices, and in particular to a battery pack integrated busbar and a molding method thereof. Background Art

[0002] The busbar of the new energy battery pack includes a blister bracket and a busbar arranged on the blister bracket. The traditional blister bracket is formed by heating and softening the plastic sheet by blister forming, including the bracket body, rivet columns formed on the bracket body, and other components. During the blister forming process, the lower end of the rivet column will produce a tie bar, which will protrude from the surface of the bracket body, and the busbar needs to be positioned with the rivet column. When there is a tie bar at the lower end of the rivet column, the busbar will have a height difference with the bracket body after positioning with the rivet column, resulting in a blasting weld when the subsequent busbar and battery pole are welded, damaging the battery pack and causing property losses.

[0003] In view of this, it is necessary to provide a battery pack integrated busbar and a molding method thereof. Summary of the invention

[0004] The present invention provides a battery pack integrated busbar and a forming method thereof, which effectively solves the problem that the existing battery pack busbar is prone to weld explosion.

[0005] The technical solution adopted by the present invention is:

[0006] The battery pack integrates a busbar, including a blister bracket, a busbar arranged on the blister bracket and an FPC. The blister bracket includes a bracket body and a rivet column integrally formed with the bracket body. A sink groove coaxial with the rivet column is arranged on the front of the bracket body.

[0007] Furthermore, the support body includes a bottom plate, a baffle plate arranged on the side of the bottom plate, and a transverse plate arranged on the bottom plate. The bottom plate is provided with a placement groove for placing the busbar, and the sink groove is arranged on the front side of the placement groove.

[0008] Furthermore, the bottom plate is provided with a position avoidance hole, which is circular.

[0009] Furthermore, a boss corresponding to the sink is arranged on the back of the bottom plate.

[0010] Furthermore, the thickness of the boss is the same as the depth of the sink.

[0011] Furthermore, a positioning hole is provided on the busbar, and the rivet column passes through the positioning hole and protrudes out of the upper end surface of the busbar. The upper end of the rivet column is provided with a round chamfer.

[0012] Furthermore, a plurality of the busbars are symmetrically arranged on the bracket body along the FPC.

[0013] The battery pack integrated busbar molding method is used to produce the battery pack integrated busbar. After the PC sheet is heated and softened, the PC sheet is transferred to the mold by vacuum adsorption, and the rivet column is blister-formed in the mold, and then cooled to form an adsorption bracket, and finally the blister bracket is welded to the busbar and FPC.

[0014] Specifically: a battery pack integrated busbar forming method, when the blister bracket and the busbar are hot-melt formed, the tie rod is located in the sink and does not contact the busbar, after the blister bracket and the busbar are hot-melt formed, the external battery pole passes through the blister bracket and is welded to the busbar,

[0015] Beneficial effects of the invention:

[0016] 1. By setting the sink groove, the tie rod can be located in the sink groove. When the busbar and the blister bracket are assembled, the lower end face of the busbar can be against the end face of the blister bracket instead of the tie rod, so as to prevent the busbar and the blister bracket from being spaced apart due to the tie rod, thereby avoiding the occurrence of weld explosion during the subsequent welding of the busbar and the battery cell.

[0017] 2. Setting a boss with the same thickness as the depth of the sink groove and ensuring that the boss corresponds to the sink groove can ensure the strength of the sink groove and facilitate processing by extruding the bracket body at the same time to realize the sink groove and the boss.

[0018] 3. By setting the placement groove, the assembly positioning between the busbar and the blister bracket can be facilitated, thereby improving the assembly accuracy and efficiency of the busbar and the blister bracket.

[0019] 4. The sink groove is coaxial with the rivet column, which can ensure that the reinforcement produced during the rivet column forming is the same as the structure of the rivet column in any direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An overall schematic diagram of the battery pack integrated busbar provided in an embodiment of the present application.

[0021] Figure 2 A schematic diagram showing one perspective of a blister bracket for a battery pack integrated with a busbar provided in an embodiment of the present application.

[0022] Figure 3 A schematic diagram showing another perspective of the blister bracket for the battery pack integrated busbar provided in an embodiment of the present application.

[0023] The markings in the figure are: 1, blister bracket; 2, busbar; 3, FPC; 11, bracket body; 12, rivet column; 101, sink groove; 111, bottom plate; 112, baffle plate; 113, cross plate; 102, placement groove; 103, avoidance hole; 114, boss; DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] like Figure 1 and Figure 2 As shown, the first embodiment provided by the present application is a battery pack integrated busbar, comprising a blister bracket 1, a busbar 2 and an FPC 3 arranged on the blister bracket 1. The blister bracket 1 comprises a bracket body 11, a rivet column 12 integrally formed with the bracket body 11, and a sink groove 101 coaxial with the rivet column 12 is arranged on the front of the bracket body 11.

[0026] In the actual production process, the blister bracket 1 is made by heating the PC sheet and then adsorbing it in the mold through a vacuum adsorption device, and then cooling it in the mold. The rivet column 12 is formed on the bracket body 11 through adsorption. During the forming process of the rivet column 12, a tension bar is generated at the connection between the rivet column 12 and the bracket body 11.

[0027] In the above design, by setting the groove 101, the tie rod can be located in the groove 101. When the busbar 2 and the blister bracket 1 are assembled, the lower end face of the busbar 2 can be against the end face of the blister bracket 1 instead of against the tie rod, thereby preventing the busbar 2 and the blister bracket 1 from forming a gap due to the tie rod, thereby avoiding the occurrence of fried welds when the busbar 2 is subsequently welded to the battery cell.

[0028] Specifically: Figure 2 and Figure 3 As shown, the bracket body 11 includes a bottom plate 111, a baffle 112 arranged on the side of the bottom plate 111, and a transverse plate 113 arranged on the bottom plate 111. The bottom plate 111 is provided with a placement groove 102 for placing the busbar 2, and the sink 101 is arranged on the front of the placement groove 102.

[0029] In actual use, after the busbar 2 is positioned in the placement groove 102, the pulse hot melt molding technology is used to fix the busbar 2 to the bracket body 11. The baffle 112 separates several busbars 2 and facilitates the subsequent fixing of the bracket body 11 to the external battery pack.

[0030] In the above design, the bracket body 11 is designed to facilitate the installation of the busbar 2 .

[0031] Specifically: Figure 2 As shown, the bottom plate 111 is further provided with a avoiding hole 103 .

[0032] In actual use, when the busbar 2 is mounted on the main body of the blister bracket 1 and then on the battery pack, the battery pack has poles, and the poles pass through the avoidance holes 103 and are welded to the busbar 2 .

[0033] In the above design, by providing the avoidance hole 103 , not only the subsequent assembly of the busbar 2 can be achieved, but also the cost of the blister bracket 1 can be saved.

[0034] Specifically: Figure 2 As shown, the avoidance hole 103 is circular.

[0035] In practical applications, the poles are usually round.

[0036] In the above design, the circular design of the avoidance hole 103 can reduce the difficulty of processing.

[0037] Specifically: Figure 2 and Figure 3 As shown, a boss 114 corresponding to the sink 101 is disposed on the back of the bottom plate 111 .

[0038] In the above design, the boss 114 corresponding to the recess 101 is provided, which can ensure the strength of the recess 101 part, and at the same time, it is also convenient to press and form the recess 101 and the boss 114 directly on the upper end surface of the bracket body 11.

[0039] Specifically, the thickness of the boss 114 is the same as the depth of the sink 101 .

[0040] In the above design, the thickness of the boss 114 is the same as the depth of the sink 101 , so that the boss 114 and the sink 101 can be formed on a flat bottom plate 111 .

[0041] Specifically, a positioning hole is provided on the busbar 2 , and the rivet column 12 passes through the positioning hole and protrudes out of the upper end surface of the busbar 2 .

[0042] In the above design, the positioning holes cooperate with the rivet studs 12 to achieve rapid positioning of the entire busbar 2 and the blister bracket 1, thereby improving assembly efficiency.

[0043] Specifically, the upper end of the rivet stud 12 is provided with a round chamfer.

[0044] In the above design, the round chamfer can be used to avoid collision with the busbar 2 when the upper end of the rivet column 12 is positioned with the busbar 2.

[0045] Specifically: Figure 1 As shown, a plurality of busbars 2 are symmetrically arranged on the bracket body 11 along the FPC 3 .

[0046] In the above design, rapid assembly of the integrated busbar 2 can be achieved.

[0047] The second embodiment provided by the present application is a battery pack integrated busbar molding method, which is used to produce the battery pack integrated busbar. After the PC sheet is heated and softened, the PC sheet is transferred to the mold by vacuum adsorption, and the rivet column 12 and the sink 101 are blister molded in the mold, and then cooled to form an adsorption bracket, and finally the blister bracket 1 is welded to the busbar 2 and FPC3.

[0048] The third embodiment provided in the present application is a battery pack integrated busbar, comprising a blister bracket 1, a busbar 2 and an FPC 3 arranged on the blister bracket 1, wherein the blister bracket 1 comprises a bracket body 11, a rivet column 12 integrally formed with the bracket body 11, and a sink 101 coaxial with the rivet column 12 is arranged on the front of the bracket body 11. The bracket body 11 comprises a bottom plate 111, a baffle 112 arranged on the side of the bottom plate 111, and a transverse plate 113 arranged on the bottom plate 111. A placement groove 102 for placing the busbar 2 is arranged on the bottom plate 111, and the sink 101 is arranged on the front of the placement groove 102. A avoidance hole 103 is also arranged on the bottom plate 111. The avoidance hole 103 is circular. A boss 114 corresponding to the sink 101 is arranged on the back of the bottom plate 111. The thickness of the boss 114 is the same as the depth of the sink 101. The busbar 2 is provided with a positioning hole, and the rivet stud 12 passes through the positioning hole and protrudes out of the upper end surface of the busbar 2. A round chamfer is provided on the upper end of the rivet stud 12. A plurality of busbars 2 are symmetrically arranged on the bracket body 11 along the FPC 3.

[0049] In the actual production process, the blister bracket 1 is made by heating the PC sheet and then adsorbing it in the mold through a vacuum adsorption device, and then cooling it in the mold. The rivet column 12 is formed on the bracket body 11 by adsorption. During the molding process of the rivet column 12, tension bars will be generated at the connection between the rivet column 12 and the bracket body 11. After the busbar 2 is positioned in the placement groove 102, the busbar 2 is fixed to the bracket body 11 using pulse hot melt molding technology. Several busbars 2 are separated by a baffle 112, and it is convenient to fix the subsequent bracket body 11 to the external battery pack. When the busbar 2 is installed on the blister bracket 1 body and then installed on the battery pack, the battery pack has a pole, and the pole passes through the avoidance hole 103 and is welded to the busbar 2.

[0050] In the above design, by setting the sink groove 101, the tie rod can be located in the sink groove 101. When the busbar 2 is assembled with the blister bracket 1, the lower end face of the busbar 2 can be against the end face of the blister bracket 1, but not against the tie rod, so as to prevent the busbar 2 and the blister bracket 1 from being spaced apart due to the tie rod, thereby avoiding the subsequent welding of the busbar 2 with the battery cell. The thickness of the boss 114 is the same as the depth of the sink groove 101, so that the boss 114 and the sink groove 101 can be formed on a flat bottom plate 111. The rounded chamfer can be used to avoid collision with the busbar 2 when the upper end of the rivet column 12 is positioned with the busbar 2. By setting the avoidance hole 103, not only the subsequent assembly of the busbar 2 can be achieved, but also the cost of the blister bracket 1 can be saved.

[0051] Specifically: In the battery pack integrated busbar forming method, when the blister bracket 1 and the busbar 2 are hot-melt formed, the tie rod is located in the sink 101 and does not contact the busbar 2. After the blister bracket 1 and the busbar 2 are hot-melt formed, the external battery pole passes through the blister bracket 1 and the busbar 2 for welding.

[0052] In the above design, it can be ensured that there is no height difference between the busbar 2 and the blister bracket 1, thereby reducing the risk of weld explosion when welding the busbar 2 and the battery core of the external pole.

[0053] To further explain in detail, it should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack integrated busbar, comprising a blister bracket (1), a busbar (2) arranged on the blister bracket (1), and an FPC (3), characterized in that: The blister bracket (1) comprises a bracket body (11) and a rivet post (12) integrally formed with the bracket body (11); a sink groove (101) coaxial with the rivet post (12) is provided on the front side of the bracket body (11).

2. The battery pack integrated busbar according to claim 1, characterized in that: The depth of the sink (101) is greater than the height of the external tie rods produced when producing the rivet stud (12).

3. The battery pack integrated busbar according to claim 1, characterized in that: The support body (11) comprises a bottom plate (111), a baffle (112) arranged on the side of the bottom plate (111), and a transverse plate (113) arranged on the bottom plate (111); a placement groove (102) for placing a busbar (2) is arranged on the bottom plate (111); and the sink groove (101) is arranged on the front side of the placement groove (102).

4. The battery pack integrated busbar according to claim 3, characterized in that: The bottom plate (111) is also provided with an avoidance hole (103), and the avoidance hole (103) is circular.

5. The battery pack integrated busbar according to claim 3, characterized in that: A boss (114) corresponding to the sink (101) is provided on the back side of the bottom plate (111).

6. The battery pack integrated busbar according to claim 5, characterized in that: The thickness of the boss (114) is the same as the depth of the sink (101).

7. The battery pack integrated busbar according to claim 1, characterized in that: The busbar (2) is provided with a positioning hole, and the rivet column (12) passes through the positioning hole and protrudes from the upper end surface of the busbar (2); the upper end of the rivet column (12) is provided with a round chamfer.

8. The battery pack integrated busbar according to claim 1, characterized in that: A plurality of busbars (2) are symmetrically arranged on the bracket body (11) along the FPC (3).

9. A method for forming a battery pack integrated busbar, used to produce the battery pack integrated busbar according to any one of claims 1 to 9, characterized in that: After the PC sheet is heated and softened, it is transferred to the mold by vacuum adsorption, and the rivet column (12) and the sink (101) are formed by vacuum molding in the mold, and then cooled to form an adsorption bracket. Finally, the vacuum molding bracket (1) is formed with the busbar (2) and the FPC (3) by pulse hot melt.

10. A method for forming a battery pack integrated busbar, characterized in that: When the blister bracket (1) and the busbar (2) are hot-melt-formed, the tie rod is located in the sink (101) and does not contact the busbar (2). After the blister bracket (1) and the busbar (2) are hot-melt-formed, the external battery pole passes through the blister bracket (1) and is welded to the busbar (2).

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