用于动力电池的连接母排

Abstract

本实用新型提供了一种用于动力电池的连接母排，包括金属排，金属排具有第一区域和第二区域，第一区域的厚度方向的两侧均设置有热压膜，第二区域用于与待焊接件的输出极焊接连接；其中，金属排的厚度W1的取值范围为0.3～1.0mm、单个热压膜的厚度W2的取值范围为0.08～0.18mm，W1+2×W2的取值范围为0.46～1.36mm。本实用新型解决了现有技术中的连接母排的结构尺寸不合理，当电池系统的Z向(电池的堆叠方向)空间极度受限时，现有的厚母排难以在有限的高度内布置，导致连接母排与电池包上盖之间的安全间隙不足，这不仅对电池包内部组件的布局造成挑战，还可能引发电气安全的问题。

Claims

1. A connecting busbar for a power battery, characterized in that, include: Metal busbar (10) having a first region (11) and a second region (12), wherein hot-pressing films (20) are provided on both sides of the first region (11) in the thickness direction, and the second region (12) is used for welding connection with the output electrode of the workpiece to be welded; The thickness W1 of the metal busbar (10) ranges from 0.3 to 1.0 mm, the thickness W2 of the hot-pressed film (20) on one side ranges from 0.08 to 0.18 mm, and the value of W1+2×W2 ranges from 0.46 to 1.36 mm.

2. The connecting busbar according to claim 1, characterized in that, In the thickness direction of the metal bar (10), the projection of the hot-pressed film (20) covers the projection of the first region (11); or, In the thickness direction of the metal bar (10), the projection of the hot-pressed film (20) coincides with the projection of the first region (11).

3. The connecting busbar according to claim 1, characterized in that, The first region (11) is provided with a first positioning hole (111), which is used to position and cooperate with the hot riveting post on the workpiece to be welded; Each of the two hot-pressed films (20) is provided with a first clearance hole at a position opposite to the first positioning hole (111); The connecting busbar also includes: The first contour adhesive (30) is applied to the periphery of the first positioning hole (111), and both ends of the first contour adhesive (30) have a first flange (31). Both first flanges (31) are folded and bonded to the periphery of the first positioning hole (111) on both sides of the hole in the thickness direction of the first region (11).

4. The busbar of claim 3, wherein The first positioning hole (111) has a circular projection shape in its axial direction, and the diameter of the first positioning hole (111) is R-△1, where R is the maximum value of the current overload capacity of the first positioning hole (111), and △1 ranges from 1 to 2 mm.

5. The connecting busbar according to claim 3, characterized in that, There are multiple first positioning holes (111), and at least two of the multiple first positioning holes (111) are spaced apart along the length direction of the first region (11); and / or, There are multiple first positioning holes (111), and at least two of the multiple first positioning holes (111) are offset along the width direction of the first region (11).

6. The connecting busbar according to claim 1, characterized in that, The first region (11) has a first overflow hole (112), the projection shape of the first overflow hole (112) in its axial direction coincides with the projection shape of the second overflow hole on the workpiece to be welded in its axial direction, and forms an overflow channel for communicating with the bottom of the battery cell. A second clearance hole is provided at the position opposite to the first overflow hole (112) of each of the two hot-pressed films (20); The connecting busbar also includes: The second contour adhesive (40) is applied to the periphery of the first overflow hole (112), and both ends of the second contour adhesive (40) have second flanges (41). The two second flanges (41) are folded and bonded to the periphery of the first overflow hole (112) on both sides of the hole in the thickness direction of the first region (11).

7. The busbar of claim 6, wherein, The first overflow hole (112) has a T-shaped projection shape in its axial direction, and the hole outline of the first overflow hole (112) is reduced by △2 based on the maximum value of current overload capacity, wherein the value of △2 is in the range of 2 to 4 mm.

8. The connecting busbar according to claim 6, characterized in that, There are multiple first overflow holes (112), and at least two of the multiple first overflow holes (112) are spaced apart along the length direction of the first region (11); and / or, There are multiple first overflow holes (112), and at least two of the multiple first overflow holes (112) are spaced apart along the width direction of the first region (11).

9. The connecting busbar according to claim 1, characterized in that, The first region (11) is provided with a second positioning hole (113), which is used to position the connecting busbar during the welding process between the second region (12) and the output electrode; A second clearance hole is provided at the position opposite to the second positioning hole (113) of each of the two hot-pressed films (20); The connecting busbar also includes: The third contour adhesive (50) is applied to the periphery of the second positioning hole (113), and both ends of the third contour adhesive (50) have third flanges (51). Both third flanges (51) are folded and bonded to the periphery of the second positioning hole (113) on both sides in the thickness direction of the first region (11).

10. The connecting busbar according to claim 9, characterized in that, There are multiple second positioning holes (113), and at least one of the multiple second positioning holes (113) has a square projection shape in its axial direction; and / or, There are multiple second positioning holes (113), and at least two of the multiple second positioning holes (113) are staggered in the length and / or width direction of the first region (11); and / or, There are multiple second positioning holes (113), and at least one of the multiple second positioning holes (113) is located at the edge of the first region (11) away from the second region (12), so that the second positioning hole (113) is a notch that passes through the edge of the first region (11).

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