Terminal and circuit board

Abstract

The utility model discloses a terminal and a circuit board, and the terminal is divided into a horizontal part and a vertical part, so as to enable the terminal to be arranged in an L shape. The vertical part is provided with a cantilever and at least one first through hole. Compared with the prior art, the terminal can reserve enough space for cantilever and hole design so as to assist welding positioning and prevent terminal fracture caused by expansion.

Description

Technical Field

[0001] The utility model relates to the field of battery voltage acquisition parts, in particular to a terminal and a circuit board. Background Art

[0002] At present, in order to reduce the cost of new energy power batteries and make parts reduce costs in terms of materials, the terminals used are generally in a straight-out form.

[0003] With the increasing demand for battery energy density, the size of the battery cells is getting smaller and smaller. For the terminals in the straight-out form, due to the too short distance between the welding line and the ultrasonic pad, it is not easy to position for auxiliary welding, and the terminals are prone to breakage after the battery cells expand.

[0004] Therefore, based on the above problems, it is necessary to improve the existing terminals to solve the above problems. Summary of the Utility Model

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides a terminal which is set in an L shape, can leave enough space for the design of the cantilever and the holes, and plays a role in assisting welding positioning and preventing the terminals from breaking due to the expansion of the battery cells.

[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0007] A terminal, comprising:

[0008] The terminal is divided into a horizontal part and a vertical part, so that the terminal is set in an L shape;

[0009] A cantilever and at least one first through hole are provided on the vertical part.

[0010] Preferably, the terminal includes an upper film layer, a lower film layer and a metal layer, and an adhesive layer is respectively provided between the upper film layer and the metal layer and between the lower film layer and the metal layer.

[0011] Preferably, the cantilever is set in an L shape, there are two first through holes, and the aperture of the first through hole is 2 mm.

[0012] Preferably, at least one first pad is provided on the surface of the horizontal part, and a plurality of second pads are provided on the vertical part, and a plurality of second through holes are opened in each second pad.

[0013] Preferably, the first pad is an ultrasonic pad, the size of the first pad is 8X5 mm, the second pad is a laser pad, and the aperture of the second through hole is 0.5 mm.

[0014] Preferably, the metal layer is copper, the upper film layer and the lower film layer are PI films, and the adhesive layer is a hot pressing adhesive.

[0015] Preferably, the thickness of the upper film layer and the lower film layer is ≤ 25 um, and the thickness of the metal layer is ≤ 70 um.

[0016] Preferably, a third through hole is provided at the connection between the horizontal portion and the vertical portion, and a notch is provided at one end of the vertical portion.

[0017] A circuit board includes: a board body, and the board body is provided with the terminals.

[0018] Preferably, it further includes a tab. The horizontal portion abuts against the tab, and the vertical portion abuts against the board body.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] The terminals are arranged in an L shape, which can leave enough space for the design of the cantilever and holes, playing a role in assisting welding positioning and preventing the terminals from breaking due to expansion. Description of the Drawings

[0021] Figure 1 is a perspective view of a terminal of the present application.

[0022] Figure 2 is a front view of a terminal of the present application.

[0023] Figure 3 is a sectional view of a terminal of the present application.

[0024] Figure 4 is a structural diagram of a circuit board of the present application. Detailed Description of the Embodiment

[0025] The following further details the specific embodiments of the present utility model in conjunction with the attached Figures 1-4 , so that the technical solution of the present utility model can be more easily understood and mastered.

[0026] In this embodiment, it should be understood that the orientation or positional relationship indicated by terms such as "middle", "upper", "lower", "top", "right side", "end", "front", "back", "middle", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0027] In addition, in this specific embodiment, if the connection or fixing method between components is not specifically stated, the connection or fixing method can be bolt fixing, nail pin fixing, or pin shaft connection, etc., which are commonly used in the prior art. Therefore, it will not be elaborated in this embodiment.

[0028] The following will further elaborate on this application in conjunction with the attached Figures 1-4 drawings.

[0029] As Figure 1 , Figure 2 and Figure 4 shown, a circuit board includes: a board body 300 and a tab 200. The board body 300 is provided with terminals 100. Specifically, the terminals 100 are arranged between the board body 300 and the tab 200.

[0030] The terminal 100 is divided into a horizontal portion 100a and a vertical portion 100b, so that the terminal 100 is arranged in an L shape. The horizontal portion 100a of the terminal 100 abuts against the tab 200, and the vertical portion 100b abuts against the board body 300. Through the L-shaped arrangement, the traditional straight-out pad is changed to a side-out pad, so that the terminal 100 laterally outputs the first pad 110 onto the tab 200, leaving enough space for the design of the cantilever 120 and the first through hole 130 mentioned below; as Figure 2 shown, at least one first pad 110 is provided on the surface of the horizontal portion 100a of the terminal 100, and a plurality of second pads 140 are provided on the vertical portion 100b. Each second pad 140 is provided with a plurality of second through holes 141; in this embodiment, the first pad 110 is an ultrasonic pad, the size of the first pad 110 is 8X5mm, and the first pad 110 is specifically the double-sided copper exposure of the horizontal portion 100a as the ultrasonic pad. The second pad 140 is a laser pad, and the aperture of the second through hole 141 is 0.5mm.

[0031] As Figures 1-2 shown, a cantilever 120 and at least one first through hole 130 are provided on the vertical portion 100b. Since the terminal 100 is arranged in an L shape, the space vacated by the vertical portion 100b can be designed for the cantilever 120 to prevent the terminal 100 from breaking due to the cyclic expansion of the battery cells in the battery pack; moreover, the terminal 100 is positioned through the first through hole 130 with the circuit board welding die, so that a plurality of second pads 140 can be accurately positioned with the circuit board pads for laser soldering; in this embodiment, two first through holes 130 are provided, the aperture of the first through hole 130 is 2mm, and the cantilever 120 is arranged in an L shape, which can better prevent the terminal 100 from breaking due to expansion.

[0032] As Figure 3As shown, the terminal 100 includes an upper film layer 150, a lower film layer 180, and a metal layer 170. An adhesive layer 160 is provided between the upper film layer 150 and the metal layer 170, and between the lower film layer 180 and the metal layer 170 respectively; in this embodiment, the metal layer 170 is copper, the upper film layer 150 and the lower film layer 180 are PI films, the adhesive layer 160 is a hot melt adhesive, the thickness range of the upper film layer 150 and the lower film layer 180 is ≤ 25um, and the thickness range of the metal layer 170 is ≤ 70um; moreover, the advantage of the PI film is that it has excellent mechanical properties, electrical properties, heat resistance, radiation resistance, etc., which is convenient for subsequent operations.

[0033] In a preferred embodiment, the thickness of the upper film layer 150 and the lower film layer 180 is 12.5um, the thickness of the adhesive layer 160 is 15um, and the thickness of the metal layer 170 is 70um. The smaller the thickness of all structures, the lower the cost, which can effectively ensure the production cost.

[0034] As Figure 1 and Figure 2 As shown, a third through hole 100c is provided at the connection of the horizontal part 100a and the vertical part 100b, and a notch 100d is provided at one end of the vertical part 100b. By providing the third through hole 100c and the notch 100d, it can further prevent the terminal 100 from being pulled by the core cyclic expansion in the battery pack, resulting in the fracture of the terminal 100.

[0035] In this application, the first through hole 130 is used for positioning with the FCC welding die, so as to accurately position a plurality of second pads 140 and the FFC pads for laser soldering. After the FCC finished product is made, the corresponding first pad 110 is welded to the bus bar 200 to make the CCS finished product.

[0036] The above-mentioned FFC refers to a circuit board, and FCC is the general term for the assembly composed of the terminal 100, the circuit board, and other base materials.

[0037] The technical effects of the present utility model are mainly reflected in the following aspects:

[0038] The terminal is set in an L shape, which can leave enough space for the design of the cantilever and holes, playing a role in assisting welding positioning and preventing the terminal from breaking due to expansion.

[0039] Of course, the above are only typical examples of the present utility model. In addition, the present utility model can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present utility model.

Claims

1. A terminal, characterized in that, Comprising: The terminal is divided into a horizontal part and a vertical part, so that the terminal is arranged in an L shape; A cantilever and at least one first through hole are provided on the vertical part; The terminal includes an upper film layer, a lower film layer and a metal layer, and an adhesive layer is provided between the upper film layer and the metal layer and between the lower film layer and the metal layer respectively.

2. The terminal according to claim 1, characterized in that: The cantilever is arranged in an L shape, there are two first through holes, and the aperture of the first through hole is 2 mm.

3. The terminal according to claim 1, characterized in that: At least one first pad is provided on the surface of the horizontal part, and a plurality of second pads are provided on the vertical part, and a plurality of second through holes are formed in each second pad.

4. The terminal according to claim 3, wherein: The first pad is an ultrasonic pad, the size of the first pad is 8X5 mm, the second pad is a laser pad, and the aperture of the second through hole is 0.5 mm.

5. The terminal according to claim 1, wherein: The metal layer is copper, the upper film layer and the lower film layer are PI films, and the adhesive layer is a hot pressing adhesive.

6. The terminal according to claim 1, wherein: The thickness of the upper film layer and the lower film layer ≤ 25 um, and the thickness of the metal layer ≤ 70 um.

7. The terminal according to claim 1, characterized in that: A third through hole is provided at the connection of the horizontal part and the vertical part, and a notch is provided at one end of the vertical part.

8. A circuit board, characterized in that, Comprising: A plate body, and the plate body is provided with the terminal according to any one of claims 1-7.

9. The circuit board according to claim 8, wherein: It further includes a tab, the horizontal part abuts against the tab, and the vertical part abuts against the plate body.

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