Double-layer spring high current chip terminal

Abstract

A double-layer spring-type high-current sheet terminal includes a terminal main board, the head of the terminal main board is connected to a plug terminal connection area, the tail of the terminal main board is connected to a device connection area, the plug terminal connection area includes an upper spring and a lower spring, the upper spring and the lower spring are respectively located on both sides of the front end of the terminal main board; the upper spring includes an inner spring made of copper on the inside and an outer spring made of stainless steel on the outside. Beneficial effect: Compared with the prior art, the spring of the utility model is double-layered, the inner spring made of copper is used as a conductor electrically connected to the plug terminal to ensure the conductive performance, and the outer spring made of stainless steel provides an outward elastic force to keep the plug terminal clamped tightly enough.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric connectors, and in particular relates to a high-current double-layer spring-type high-current sheet terminal. Background Art

[0002] It is mainly used for strong electrical connection between new energy vehicle batteries, electronic controls, motors and other equipment to achieve quick plug-in and disconnect functions. The high-voltage and high-current connector socket terminals are usually connected to the equipment with bolts. One end of the socket terminal (also called a sheet terminal) is electrically connected to the plug terminal, and the other end is electrically connected to other equipment (such as a copper busbar).

[0003] In order to facilitate the connection between the sheet terminal and the copper busbar, there are now two ways:

[0004] The first type: Figure 1 The tail end of the sheet terminal body 100 (the end connected to the copper busbar) is a thickened area 800, and a screw hole 801 is provided in the thickened area 800. The screw hole 801 is fixedly connected to the copper busbar by bolts.

[0005] The second type: Figure 2 The tail end of the sheet terminal body 100 (the end connected to the copper busbar) is bent and extended to the side to form a vertical plate 820. The vertical plate 820 is bent and extended to the rear (away from the plug terminal) to form a deviating plate 821. The deviating plate 821, the vertical plate 820, and the tail end of the body 100 form a Z-shaped structure. The deviating plate 320 is bent and extended to the side to form a mounting plate 822. The side of the mounting plate 822 is riveted with a nut 823, and the screw hole 824 of the nut 823 is fixedly connected to the copper busbar by bolts.

[0006] In the plug terminal connection area 200, a conductive copper spring is generally used as an electrical connection conductor. However, the copper spring is easily deformed and may lose its elasticity after long-term use, resulting in a loose clamping of the plug terminal and weakened conductive performance. Utility Model Content

[0007] The technical problem to be solved by the utility model is: how to design a current double-layer spring sheet high-current sheet terminal to avoid loose clamping of the plug terminal.

[0008] The specific plan is as follows:

[0009] A double-layer spring-type high-current sheet terminal comprises a terminal main board, the head of the terminal main board is connected to a plug terminal connection area, the tail of the terminal main board is connected to a device connection area, the plug terminal connection area comprises an upper spring sheet and a lower spring sheet, the upper spring sheet and the lower spring sheet are respectively located on both sides of the front end of the terminal main board; the upper spring sheet comprises an inner upper spring sheet made of copper material on the inside and an outer upper spring sheet made of stainless steel material on the outside; the lower spring sheet comprises an inner lower spring sheet made of copper material on the inside and a lower outer spring sheet made of stainless steel material on the outside; the space between the upper inner spring sheet and the lower inner spring sheet is a plug terminal insertion area.

[0010] The upper spring sheet, the terminal main board and the lower spring sheet are fixed together by rivets.

[0011] The upper outer spring sheet at the front end of the terminal main board extends toward the lower outer spring sheet to form an upper side plate, and the lower outer spring sheet at the front end of the terminal main board extends toward the upper outer spring sheet to form a lower side plate. Both the lower side plate and the upper side plate are in contact with the terminal main board.

[0012] There are two lower side plates and two upper side plates, which are respectively distributed on both sides of the terminal main board. The lower side plate and the upper side plate are welded and fixed at the contact point of the end surface.

[0013] The upper side plate is provided with a groove.

[0014] The upper side plate extends inwardly to form a guard plate, and the connection between the guard plate and the upper side plate is a smooth curved surface.

[0015] Beneficial effect: Compared with the prior art, the spring piece of the utility model is double-layered, and the inner spring piece made of copper is used as a conductor electrically connected to the plug terminal to ensure the conductive performance, and the outer spring piece made of stainless steel provides an outward elastic force to keep the plug terminal clamped tightly enough. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the prior art (I).

[0017] Figure 2 It is a schematic diagram of the prior art (II).

[0018] Figure 3 It is a schematic diagram of the utility model.

[0019] Figure 4 It is a three-dimensional schematic diagram of the utility model.

[0020] Figure 5 It is an enlarged schematic diagram of the head of the utility model.

[0021] Figure 6 is an enlarged schematic diagram of the side panel.

[0022] Figure 7 It is an enlarged schematic diagram of the bent plate.

[0023] Figure 8 This is an enlarged schematic diagram of the support block (a).

[0024] Fig. 9 This is an enlarged schematic diagram of the support block (II).

[0025] Fig.10 It is a schematic diagram (II) of the present utility model. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the present invention.

[0027] like Figure 3-4 A high-current chip terminal includes a terminal main board 100, a head of the terminal main board 100 is connected to a plug terminal connection area 200, and a tail of the terminal main board 100 is connected to a device connection area 300.

[0028] like Figure 8-10 The connection area 300 is a sheet-type terminal anti-torsion deformation structure, including the tail end of the terminal main board 100. The tail end of the terminal main board 100 is bent and extended to the side to form a vertical plate 310. The vertical plate 310 is bent and extended to the rear (away from the plug terminal) to form a deviation plate 320. The deviation plate 320, the vertical plate 310, and the tail end of the body 100 form a Z-shaped structure. The deviation plate 320 is bent and extended to the side to form a mounting plate 330. The mounting plate 330 is provided with a screw hole 331, and the screw hole 331 is fixedly connected to the copper busbar by bolts.

[0029] A support block 340 is disposed between the rear end of the terminal main board 100 and the mounting plate 330 , and the support block 340 is in contact with a front side surface 339 (close to the plug terminal) of the mounting plate 330 and the terminal main board 100 .

[0030] like Figure 8-9 For the sake of firmness, the support block 340 is fixed to the terminal main board 100 , or the support block 340 is fixed to the mounting plate 330 .

[0031] like Figure 8-9 For the sake of firmness, the support block 340 is integrally formed with the terminal main board 100 .

[0032] like Fig.10 For the sake of firmness, the support block 340 is fixed to the front side surface 339 of the mounting plate 330 , and a limiting plate 140 extends from the side of the terminal main board 100 , and the support block 340 contacts the end surface of the limiting plate 140 .

[0033] like Fig.10 For the sake of firmness, the support block 340 and the mounting plate 330 are integrally formed, and the limiting plate 140 and the terminal main board 100 are integrally formed.

[0034] For the purpose of firmness, the side surface of the mounting plate 330 is screwed with a rivet nut 333 , and the screw hole 331 of the nut 333 is fixedly connected to the copper bar by bolts.

[0035] In this way, the support block 340 and the front side surface 339 of the mounting plate 330 are in contact with each other, and the screw in the screw hole 331 is rotated counterclockwise ( Figure 8 During the tightening process (in the middle direction), the support block 340 can offset the above torque and keep the high-current chip terminal itself stable. The high-current chip terminal itself will not be deformed and will not affect the use of the electrical connector.

[0036] In the plug terminal connection area 200, a conductive copper spring is generally used as an electrical connection conductor. However, the copper spring is easily deformed and may lose its elasticity after long-term use, resulting in a loose clamping of the plug terminal and weakened conductive performance.

[0037] To this end, the following improvements are made:

[0038] like Figure 5-6 The plug terminal connection area 200 includes an upper spring sheet 219 and a lower spring sheet 229, which are respectively located on both sides of the front end of the terminal main board 100, and the three are fixed together by rivets 230.

[0039] like Figure 5-6 The upper spring piece 219 includes an inner upper spring piece 210 made of copper material on the inside and an outer upper spring piece 211 made of stainless steel material on the outside. The lower spring piece 229 includes an inner lower spring piece 220 made of copper material on the inside and an outer lower spring piece 221 made of stainless steel material on the outside. The space between the upper inner spring piece 210 and the lower inner spring piece 220 is the plug terminal insertion area.

[0040] In this way, the inner spring piece made of copper is used as a conductor electrically connected to the plug terminal to ensure the conductive performance, and the outer spring piece made of stainless steel provides an outer elastic force (positive force) to keep the plug terminal clamped tightly enough.

[0041] like Figure 5-6 In order to further increase the conductivity, the upper outer spring piece 211 located at the front end of the terminal main board 100 extends toward the lower outer spring piece 221 to form an upper side plate 212, and the lower outer spring piece 221 located at the front end of the terminal main board 100 extends toward the upper outer spring piece 211 to form a lower side plate 222. Both the lower side plate 222 and the upper side plate 212 are in contact with the terminal main board 100. In this way, current can pass between the lower side plate 222, the upper side plate 212 and the terminal main board 100 (because stainless steel can also conduct electricity), thereby increasing the conductivity.

[0042] like Figure 5-6In order to increase stability, two lower side plates 222 and two upper side plates 212 are provided, which are respectively distributed on both sides of the terminal main board 100. The end surface contact point 240 of the lower side plate 222 and the upper side plate 212 is welded and fixed. In this way, the terminal main board 100 and the two inner spring sheets are wrapped by the upper outer spring sheet 211, the lower outer spring sheet 221, and the two side plates (the lower side plate 222 and the upper side plate 212 are collectively referred to as side plates), and the physical stability is increased.

[0043] like Figure 5-6 In order to increase its stability in the connector, the upper side plate 212 is provided with a groove 213, which can form a shape match with the protrusions of other components in the connector (such as the plastic shell) to prevent it from moving in the connector.

[0044] like Figure 5-7 The edge of the upper side plate 212 is relatively sharp. In order to prevent it from scratching other components in the connector, the upper side plate 212 extends inward to form a guard plate 214. The connection between the guard plate 214 and the upper side plate 212 is a smooth curved surface 215. In this way, the smooth curved surface 215 can avoid scratching other components in the connector.

[0045] The specific working process is:

[0046] When assembling itself, the upper spring sheet 219, the lower spring sheet 229 and the terminal main board 100 are first fixed together by rivets 230, and then the end surface contact part 240 is laser welded.

[0047] When it is assembled in the electrical connector, the screw hole 331 is fixedly connected to the copper busbar by bolts, so that the high-current chip terminal can be connected to other devices. When the bolts are tightened, the support block 340 can offset the above-mentioned torque and maintain the stability of the high-current chip terminal itself.

[0048] When in use, the copper inner spring piece is electrically connected to the plug terminal to ensure conductivity.

[0049] Features of this patent:

[0050] S1. This design adds an extension feature to the left side of the riveting nut area of ​​the copper bar of the female terminal; and adds a support feature to the right side of the copper bar of the female terminal to support the deformed area to prevent the copper bar from deforming during the bolting process and ensure the reliability of the connection.

[0051] After testing, this design structure can be kept intact under the action of 10N·m screw torque, which can ensure that the terminal contact surface and the copper busbar in the equipment are on the same plane. The recommended torque value of the M6 ​​bolt (the bolt inserted into the screw hole 331) at this connection is 8N·m, which can ensure that the terminal is not deformed when used correctly, avoiding problems such as excessive temperature rise and terminal ablation.

[0052] S2. A bending structure is added to the outer spring piece, and the sheet metal is bent to form a rounded shape. During the assembly process, it can smoothly pass through the boss on the plastic shell; after assembly, the groove of the outer spring piece will be stuck on the boss of the plastic shell, so that the female terminal is firmly fixed and provides retention force.

[0053] S3. After the terminals of this design are assembled, the gaps between the outer spring pieces are connected and fixed by laser welding, and the inner spring pieces, inner spring pieces and the middle copper busbar are wrapped to improve the mechanical and electrical performance stability of the female terminal.

[0054] For other details, please refer to the prior art and will not be described in detail.

[0055] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A double-layer spring-type high-current chip terminal, comprising a terminal main board (100), the head of the terminal main board (100) being connected to a plug terminal connection area (200), and the tail of the terminal main board (100) being connected to a device connection area (300), characterized in that: The plug terminal connection area (200) comprises an upper spring sheet (219) and a lower spring sheet (229), and the upper spring sheet (219) and the lower spring sheet (229) are respectively located on two sides of the front end of the terminal main board (100); The upper spring piece (219) comprises an inner upper spring piece (210) made of copper material and an outer upper outer spring piece (211) made of stainless steel material. The lower spring piece (229) comprises an inner lower spring piece (220) made of copper material and an outer lower outer spring piece (221) made of stainless steel material. The space between the upper inner spring sheet (210) and the lower inner spring sheet (220) is a plug terminal insertion area.

2. The double-layer spring-type high-current terminal according to claim 1, characterized in that: The upper spring sheet (219), the terminal main board (100) and the lower spring sheet (229) are fixed together by means of rivets (230).

3. The double-layer spring-type high-current terminal according to claim 2, characterized in that: The upper outer spring sheet (211) located at the front end of the terminal main board (100) extends in the direction of the lower outer spring sheet (221) to form an upper side plate (212), and the lower outer spring sheet (221) located at the front end of the terminal main board (100) extends in the direction of the upper outer spring sheet (211) to form a lower side plate (222), and both the lower side plate (222) and the upper side plate (212) are in contact with the terminal main board (100).

4. The double-layer spring-type high-current terminal according to claim 3, characterized in that: Two lower side plates (222) and two upper side plates (212) are provided, respectively distributed on both sides of the terminal main plate (100), and the end surface contact points (240) of the lower side plates (222) and the upper side plates (212) are welded and fixed.

5. The double-layer spring-type high-current terminal according to claim 4, characterized in that: The upper side plate (212) is provided with a groove (213).

6. The double-layer spring-type high-current terminal according to claim 5, characterized in that: The upper side plate (212) extends inwardly to form a guard plate (214), and the connection between the guard plate (214) and the upper side plate (212) is a smooth curved surface (215).

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