CN215732109U

CN215732109U - Voltage sampling point suitable for aluminum battery connecting piece

Info

Publication number: CN215732109U
Application number: CN202122182373.3U
Authority: CN
Inventors: 谢仁锋; 谢林江; 刘贻安; 朱勇光
Original assignee: Dongguan Wanlian Industry Co ltd
Current assignee: Dongguan Wanlian Industry Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-02-01
Anticipated expiration: 2031-09-10

Abstract

The utility model discloses a voltage sampling point suitable for an aluminum battery connecting piece, which comprises a PCB (printed Circuit Board), a copper-aluminum composite sheet and a first voltage sampling point connector, wherein the copper-aluminum composite sheet comprises an aluminum sheet and a nickel-plated copper sheet. The first voltage sampling point connector can realize better welding and contact through the PCB and the copper-aluminum composite sheet, the copper-aluminum composite sheet is favorable for laser welding operation with the battery connecting piece of aluminum, the copper-aluminum composite sheet can realize better welding and contact with the battery connecting piece of aluminum, and the problem that the existing copper-clad PCB or connector cannot be directly welded on the battery connecting piece of aluminum can be solved. In addition, first voltage sampling point connector can realize detachable the connection with the second voltage sampling point connector on the voltage sampling flexible circuit board, makes things convenient for battery connecting piece and voltage sampling flexible circuit board's installation and dismantlement, when needs change the battery, need not to change together with voltage sampling flexible circuit board, the cost is reduced.

Description

Voltage sampling point suitable for aluminum battery connecting piece

Technical Field

The utility model relates to the technical field of battery connecting pieces, in particular to a voltage sampling point suitable for an aluminum battery connecting piece.

Background

In the industry of new energy batteries, battery voltage sampling points can be installed on battery connectors, and the connection mode of the current battery voltage sampling points can include the following: 1. drilling holes in an aluminum row of the battery connecting piece, connecting the holes by using a nut and a screw, and crimping a connector at one end of a sampling wire harness; 2. a flexible PCB is adopted, a nickel sheet extends out of the side face of the flexible PCB, and the nickel sheet is welded on an aluminum bar of the battery connecting piece by using a laser welding technology; 3. one end (bare copper) of the sampling wire bundle is directly welded on the aluminum row of the battery connecting piece by using an ultrasonic welding technology. However, 1 st mode is connected with the nut screw rod, the manual installation is inconvenient, and it is not hard up easily, the contact is not good, 2 nd mode is welded the nickel piece with laser welding technique, if follow-up battery of changing, the nickel piece can not be dismantled, can only change whole flexible PCB board together, the cost is too high, 3 rd mode is arranged on the aluminium row of battery connecting piece copper line lug weld with ultrasonic welding technique, if follow-up battery of changing, also can not dismantle, can only change whole sampling pencil together, the cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a voltage sampling point suitable for an aluminum battery connecting piece.

In order to achieve the purpose, the utility model provides a voltage sampling point suitable for an aluminum battery connecting piece, which comprises a PCB (printed circuit board), a copper-aluminum composite sheet and a first voltage sampling point connector, wherein the first voltage sampling point connector is welded on the first surface of the PCB, the copper-aluminum composite sheet comprises an aluminum sheet and a copper sheet with the area smaller than that of the aluminum sheet, the second surface of the copper sheet is plated with nickel to form a nickel-plated surface, the nickel-plated surface of the copper sheet is welded with the first surface of the aluminum sheet, a plurality of aluminum welding spots are arranged on the side surface of the PCB, the welding spots of the PCB are electrically connected with pins of the first voltage sampling point connector through a circuit arranged on the PCB, and the welding spots of the PCB are welded on the first surface of the copper sheet, so that the second surface of the PCB is attached and fixed on the copper sheet.

Preferably, the first voltage sampling point connector is provided as a plug type connector or a contact type connector.

Preferably, the thickness of the aluminum sheet is set to 0.4mm to 0.7 mm.

Preferably, the thickness of the copper sheet is set to be 0.03mm to 0.06 mm.

Preferably, the nickel-plated surface of the copper sheet is welded with the first surface of the aluminum sheet by a polymer diffusion welding method.

Preferably, the first voltage sampling point connector is soldered on the first surface of the PCB by SMT reflow soldering.

Preferably, the welding points of the PCB are welded on the first surface of the copper sheet in an SMT reflow soldering mode.

Compared with the prior art, the utility model has the beneficial effects that:

1. the novel voltage sampling point comprises a PCB, a copper-aluminum composite sheet and a first voltage sampling point connector, wherein the first voltage sampling point connector can realize better welding and contact with the copper-aluminum composite sheet through the PCB, the copper-aluminum composite sheet is favorable for laser welding operation with an aluminum battery connecting piece, so that the copper-aluminum composite sheet can realize better welding and contact with the aluminum battery connecting piece, and the problem that the existing copper-clad PCB or connector cannot be directly welded on the aluminum battery connecting piece can be solved.

2. The first voltage sampling point connector adopted by the novel voltage sampling point can be detachably connected with the second voltage sampling point connector on the voltage sampling flexible circuit board, so that the battery connecting piece and the voltage sampling flexible circuit board are convenient, when a battery needs to be replaced, the battery does not need to be replaced together with the voltage sampling flexible circuit board, and the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a novel voltage sampling point provided by an embodiment of the present invention;

fig. 2 is a cross-sectional view of a copper-aluminum composite sheet provided by an embodiment of the utility model;

FIG. 3 is an assembly view of a voltage sampling point and an aluminum battery connector provided in accordance with an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a voltage sampling flexible circuit board and a second voltage sampling point connector according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, an embodiment of the present invention provides a voltage sampling point suitable for an aluminum battery connector, including a PCB 2, a copper-aluminum composite sheet 3, and a first voltage sampling point connector 4, and the following describes each component of the embodiment in detail with reference to the drawings.

As shown in fig. 1 and 2, the first voltage sampling point connector 4 is welded on the first surface of the PCB 2, the copper-aluminum composite sheet 3 includes an aluminum sheet 31 and a copper sheet 32 having an area smaller than that of the aluminum sheet 31, a second surface of the copper sheet 32 is plated with nickel to form a nickel-plated surface 33, the nickel-plated surface 33 of the copper sheet 32 is welded with the first surface of the aluminum sheet 31, a side surface of the PCB 2 is provided with a plurality of aluminum welding points 21, the welding points 21 of the PCB 2 are electrically connected with pins of the first voltage sampling point connector 4 through a circuit arranged on the PCB 2, and the welding points 21 of the PCB 2 are welded on the first surface of the copper sheet 32, so that the second surface of the PCB 2 is fixed on the copper sheet 32 in a fitting manner.

In this embodiment, the nickel-plated surface 33 of the copper sheet 32 may be welded to the first surface of the aluminum sheet 31 by polymer diffusion welding. The first voltage sampling point connector 4 may be soldered on the first surface of the PCB board 2 by SMT reflow soldering. The pads 21 of the PCB 2 may be soldered on the first surface of the copper sheet 32 by SMT reflow soldering.

Wherein, a nickel plating layer is arranged between the copper sheet 32 and the aluminum sheet 31, which is beneficial to the welding of the copper sheet 32 and the aluminum sheet 31 together in a macromolecule diffusion welding mode.

Preferably, the first voltage sampling point connector 4 may be provided as a plug type connector, a contact type connector, or other various connectors that are easily detachable.

In specific implementation, the thickness of the aluminum sheet 31 can be preferably set to be 0.4 mm-0.7 mm as obtained through finite element analysis simulation experiments, so that the problem of thermal expansion stress in reflow soldering can be well solved, and the aluminum sheet 31 is prevented from being damaged by cracking and the like. In addition, the thickness design of aluminum sheet 31 also is based on the clearance consideration of structure, and it makes things convenient for the clamping of aluminum sheet and tool.

The thickness of the copper sheet 32 can be preferably set to be 0.03 mm-0.06 mm through finite element analysis simulation experiments, so that the problem of thermal expansion stress in reflow soldering is well solved, and the copper sheet 32 is prevented from being damaged by cracking and the like.

As shown in fig. 3, the voltage sampling points of the present embodiment may be welded to the aluminum battery connecting member 1, wherein the aluminum sheets 31 of the voltage sampling points may be welded to the battery connecting member 1 by means of laser welding. The aluminum sheet 31 and the battery connecting member 1 are welded in a linear shape, and the welded joint 7 is in a linear shape.

During the specific use, detachable the connection can be realized with second voltage sampling point connector 6 on the voltage sampling flexible circuit board 5 to first voltage sampling point connector 4 of voltage sampling point, and second voltage sampling point connector 6 also sets up to plug type connector, contact type connector or other various convenient connectors of dismantling that match with first voltage sampling point connector 4. When the first voltage sampling point connector 4 is a male terminal, the second voltage sampling point connector 6 is a female terminal, and when the first voltage sampling point connector 4 is a female terminal, the second voltage sampling point connector 6 is a male terminal.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a voltage sampling point suitable for aluminium matter battery connecting piece, its characterized in that, includes PCB board, copper-aluminium composite sheet and first voltage sampling point connector, first voltage sampling point connector welding is on the first surface of PCB board, copper-aluminium composite sheet includes that aluminum sheet and area are less than the copper sheet of aluminum sheet, thereby it forms the nickel plating surface to electroplate nickel on the second surface of copper sheet, the nickel plating surface of copper sheet is in the same place with the first surfacing of aluminum sheet, the side of PCB board is equipped with the solder joint of a plurality of aluminium matter, the solder joint of PCB board is connected with the pin electricity of first voltage sampling point connector through the circuit of arranging on the PCB board, the solder joint welding of PCB board is on the first surface of copper sheet to the second surface laminating that makes the PCB board is fixed on the copper sheet.

2. The voltage sampling point suitable for the aluminum battery connecting piece as claimed in claim 1, wherein the first voltage sampling point connector is provided as a plug type connector or a contact type connector.

3. The voltage sampling point for an aluminum battery connector as set forth in claim 1, wherein the aluminum sheet is set to have a thickness of 0.4mm to 0.7 mm.

4. The voltage sampling point for the aluminum battery connecting part as set forth in claim 1, wherein the thickness of the copper sheet is set to 0.03mm to 0.06 mm.

5. The voltage sampling point suitable for the aluminum battery connecting piece as claimed in claim 1, wherein the nickel-plated surface of the copper sheet is welded with the first surface of the aluminum sheet by means of polymer diffusion welding.

6. The voltage sampling point suitable for the aluminum battery connecting part as set forth in claim 1, wherein the first voltage sampling point connector is soldered on the first surface of the PCB board by SMT reflow soldering.

7. The voltage sampling point for the aluminum battery connecting part as recited in claim 1, wherein the solder points of the PCB board are soldered on the first surface of the copper sheet by SMT reflow soldering.