Battery combination shell

Abstract

The utility model relates to the technical field of power batteries, and specifically to a battery assembly shell, including a shell and a rivet, wherein a mounting hole is opened at one end of the shell, and an inner spacer is arranged on the inner wall surface of the shell at the mounting hole, and at the same time, an outer spacer is arranged on the outer wall surface and side wall of the shell at the mounting hole, and the rivet is assembled at the mounting hole, and the rivet includes an inner riveted end formed before assembly and an outer riveted end formed during assembly, and the rivet passes through the mounting hole from the inside of the shell until the inner riveted end is pressed onto the inner spacer, and the part of the rivet passing through the mounting hole is cold-forged and flanging to form an outer riveted end, and the outer riveted end is pressed onto the outer spacer. The utility model solves the technical problems in the prior art that the uncontrolled riveting process of the battery assembly shell easily leaves metal fragments in the battery shell and the mating surface cannot be compacted.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a battery combination shell. Background Art

[0002] The battery pack is a key component for protecting and managing battery packs. It not only provides physical protection, but also helps maintain the performance and safety of the battery. At the same time, the battery pack is an important component of the battery system of electric vehicles. It not only provides the necessary physical protection, but also has a direct impact on the performance and safety of the battery. With the continuous advancement of electric vehicle technology, the design and manufacture of battery packs are also constantly being optimized and innovated to meet higher standards. At present, the connection method of the battery pack is relatively complicated. The rivets need to be cold-forged on both sides of the battery shell, which easily leaves metal fragments inside the shell. The shape of the riveted surface of the rivet is complex, especially the outer end face of the shell, which requires multiple cold-forging. The riveted shape after cold-forging is uncontrolled, resulting in failure to compact during sealing and contact short circuit. Utility Model Content

[0003] In order to solve the technical problems in the prior art of the uncontrolled riveting process of the battery combination shell, which easily leads to metal fragments being left in the battery shell and the mating surface being unable to be compacted, the present application proposes a battery combination shell that solves the above technical problems.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] The utility model provides a battery combination shell, comprising: a shell, wherein a mounting hole is opened at one end of the shell, and an inner isolating piece is arranged on the inner wall surface of the shell at the mounting hole, and at the same time, an outer isolating piece is arranged on the outer wall surface and side wall of the shell at the mounting hole; a rivet, wherein the rivet is assembled at the mounting hole, and the rivet comprises an internal rivet end formed before assembly and an external rivet end formed during the assembly process, the rivet passes through the mounting hole from the inside of the shell until the internal rivet end is pressed onto the inner isolating piece, and the portion of the rivet passing through the mounting hole is cold-forged and flanging-processed to form the external rivet end, and the external rivet end is pressed onto the external isolating piece.

[0006] Furthermore, a surface of the internal riveted end away from the interior of the battery is filled with sealant.

[0007] Furthermore, the outer edge of the outer isolator extends out of the enclosure along the axial direction away from the shell to position the external riveted end.

[0008] Furthermore, a sealing nail is arranged on a surface of the external riveted end away from the shell.

[0009] Furthermore, a shallow groove is formed on the external riveted end to accommodate the flange ring of the sealing pin.

[0010] Furthermore, a protruding positioning rib extending axially is formed on the inner isolating member, and the positioning rib wraps around the side surface of the inner riveted end.

[0011] Furthermore, a sealing member is included, which is arranged on the inner wall surface of the mounting hole and is clamped by the outer isolating member, the rivet, the inner isolating member and the shell.

[0012] Furthermore, the sealing member is fitted with a side surface of the inner isolating member, and the fitting surface is an inclined surface.

[0013] Based on the above technical solution, the technical effects that can be achieved by the present invention are:

[0014] The battery combination shell of the present invention has a riveted part including an internal riveted end that has been formed before assembly and an external riveted end that is formed during the assembly process. The riveted part passes through the mounting hole from the inside of the shell until the internal riveted end presses the inner isolation part onto the inner wall surface of the shell. The part of the riveted part that passes through the mounting hole is cold headed to form the external riveted end. The internal riveted end has been formed before assembly and will not leave metal fragments in the shell. At the same time, the external riveted end only needs to be cold headed and flanging once during the assembly process. The shape after cold headed is easy to control, ensuring that the mating surface is compacted. The cold head process of the external riveted end occurs outside the shell, and metal fragments generated during the process will not enter the shell. This solves the technical problems in the prior art of the uncontrolled riveting process of the battery combination shell, which easily leave metal fragments in the battery shell and the inability to compact the mating surface.

[0015] The battery assembly shell of the utility model has a sealing compound on the side of the internal riveted end away from the interior of the battery. During battery assembly, after the riveted part and the current collecting plate inside the battery are penetrated and welded, the sealing compound is filled to prevent penetration welding. The sealing pin and the riveted part do not need to be sealed and welded, and only firm welding needs to be ensured, which reduces the welding difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the battery combination shell of the present utility model.

[0017] Among them: 1-shell; 2-inner isolation part, 21-positioning rib; 3-outer isolation part, 31-enclosure; 4-riveted part, 41-inner riveted end, 42-outer riveted end; 5-sealant; 6-sealing nail, 61-flange ring; 7-seal. DETAILED DESCRIPTION

[0018] 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 embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] like Figure 1 As shown, the utility model provides a battery combination shell, including a shell 1 and a rivet 4, a mounting hole is opened at one end of the shell 1, an inner isolating member 2 is arranged on the inner wall surface of the shell 1 at the mounting hole, and an outer isolating member 3 is arranged on the outer wall surface and side wall of the shell 1 at the mounting hole, the rivet 4 is assembled at the mounting hole, the rivet 4 includes an internal rivet end 41 that has been formed before assembly and an external rivet end 42 formed during the assembly process, the rivet 4 passes through the mounting hole from the inside of the shell 1 until the internal rivet end 41 presses the inner isolating member 2 on the inner wall surface of the shell 1, the part of the rivet 4 that passes through the mounting hole is cold headed and flanging to form an external rivet end 42, and the external rivet end 42 presses the outer isolating member 3 on the outer wall surface of the shell 1.

[0020] In the battery combination shell of the present invention, the rivet part 4 includes an internal rivet end 41 that has been formed before assembly and an external rivet end 42 that is formed during the assembly process. The rivet part 4 passes through the mounting hole from the inside of the shell 1 until the internal rivet end 41 presses the inner isolation part 2 onto the inner wall surface of the shell 1. The part of the rivet part 4 that passes through the mounting hole is cold headed to form the external rivet end 42. The internal rivet end 41 has been formed before assembly and will not leave metal fragments in the shell 1. At the same time, the external rivet end 42 only needs to be cold headed and flanging once during the assembly process. The shape after cold heading is easy to control, ensuring that the mating surface is compacted, and the cold heading process of the external rivet end 42 occurs outside the shell 1. The metal fragments generated during the process will not enter the inside of the shell 1, which solves the technical problems in the prior art of the uncontrolled riveting process of the battery combination shell, which easily leaves metal fragments in the battery shell 1 and the mating surface cannot be compacted.

[0021] In one embodiment of the present invention, the surface of the internal rivet end 41 facing away from the battery interior is filled with sealant 5. During battery assembly, after the rivet 4 is through-welded to the current collecting tray inside the battery, the sealant is filled in to prevent penetration. This eliminates the need for seal welding between the sealing pin 6 and the rivet 4; only a secure weld is required, reducing welding complexity.

[0022] Preferably, the outer edge of the outer spacer 3 extends out of the enclosure 31 away from the housing 1 in the axial direction to position the outer riveted end 42 .

[0023] Specifically, a sealing nail 6 is disposed on a surface of the external riveting end 42 away from the housing 1 .

[0024] Furthermore, a shallow groove is formed on the external riveted end 42 to accommodate the flange ring 61 of the sealing pin.

[0025] In a specific embodiment of the present invention, an axially extending protruding positioning rib 21 is formed on the inner isolator 2. The positioning rib 21 wraps around the side of the internal riveted end 41, which can be used for positioning when the riveted part 4 is assembled, reducing the difficulty of assembly.

[0026] In a specific embodiment of the present invention, a sealing member 7 is further included. The sealing member 7 is arranged on the inner wall surface of the mounting hole and is clamped by the outer isolator 3 , the rivet 4 , the inner isolator 2 and the housing 1 .

[0027] Furthermore, the seal 7 is fitted with the side of the inner isolator 2, and the fitting surface is a slope, so that the inner isolator 2 forms a slope portion. Correspondingly, a slope space is formed for the seal 7 to deform and move. In this way, even if the seal 7 is not completely moved into place, there is still a slope portion formed by the isolator between the rivet 4 and the shell 1 for insulation, avoiding the formation of a direct gap between the rivet 4 and the shell 1, thereby improving the insulation of the finished battery.

[0028] It should be understood that the specific embodiments described above are only used to explain the present invention and are not intended to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A battery combination shell, characterized in that: include: A shell (1), wherein one end of the shell (1) is provided with a mounting hole, an inner wall surface of the shell (1) at the mounting hole is provided with an inner isolating member (2), and an outer wall surface and a side wall of the shell (1) at the mounting hole are provided with an outer isolating member (3); A rivet (4), the rivet (4) being assembled at the mounting hole, the rivet (4) comprising an internal rivet end (41) formed before assembly and an external rivet end (42) formed during assembly, the rivet (4) passing through the mounting hole from the inside of the shell (1) until the internal rivet end (41) is pressed onto the inner isolating member (2), the portion of the rivet (4) passing through the mounting hole is cold-forged and flanging to form the external rivet end (42), and the external rivet end (42) is pressed onto the outer isolating member (3).

2. The battery assembly shell according to claim 1, characterized in that: The surface of the internal riveting end (41) away from the interior of the battery is filled with sealing glue (5).

3. The battery assembly shell according to claim 1, characterized in that: The outer edge of the outer isolating member (3) extends out of the enclosure (31) axially away from the housing (1) to position the outer riveted end (42).

4. The battery assembly shell according to claim 1, characterized in that: A sealing nail (6) is arranged on a surface of the external riveting end (42) away from the housing (1).

5. The battery assembly shell according to claim 4, characterized in that: A shallow groove is formed on the external riveting end (42) to accommodate the flange ring (61) of the sealing pin.

6. The battery assembly shell according to claim 1, characterized in that: An axially extending protruding positioning rib (21) is formed on the inner isolation member (2), and the positioning rib (21) wraps around the side surface of the inner riveted end (41).

7. The battery assembly shell according to claim 1, characterized in that: It also includes a sealing member (7), which is arranged on the inner wall surface of the mounting hole and is clamped by the outer isolating member (3), the riveting member (4), the inner isolating member (2) and the shell (1).

8. The battery assembly shell according to claim 7, characterized in that: The sealing member (7) is fitted to the side surface of the inner isolating member (2), and the fitting surface is an inclined surface.

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