CN203327376U - Printed circuit board (PCB) for battery management system - Google Patents

Abstract

The utility model relates to a PCB board for a battery management system. The PCB board adopts an aluminum substrate, and a copper bar is arranged at the input terminal of the current signal on the aluminum substrate. . The copper bars are welded on the copper foil of the aluminum substrate. Compared with the existing technology, the utility model can design the size of the copper bar according to the requirements of the specific application environment. The maximum current that can pass is different with the different size of the copper bar, and the design is flexible. At the same time, screw holes are set on the copper bar to facilitate input lines Install.

Description

A kind of PCB board for battery management system

technical field

The utility model relates to the technical field of battery management systems, in particular to a PCB board used in the battery management system.

Background technique

Ordinary PCB circuit boards mostly use epoxy resin as the base material, the surface is covered with copper, and then the circuit is made. This kind of circuit board has poor heat dissipation capability and can carry a small current, so it is not suitable for high current applications, such as circuit boards for battery management systems that need to pass high current. There are also some PCB circuit boards that use aluminum plate as the base material. The aluminum plate can play the role of heat dissipation. The current on this circuit board still passes through the copper foil on the surface. The thickness of the copper foil is limited, and the current it can carry is still very small. At the same time, the large current must be connected with thick connecting wires. It is also difficult to weld the thick wires on the copper foil of the PCB board, and it is easy to fall off after welding, which increases the defective rate of the product.

Utility model content

In order to solve the above problems, the utility model provides a PCB board for a battery management system.

The technical scheme of the utility model is as follows: a PCB board for a battery management system, including a substrate, a copper row is arranged at the input end of the current signal on the substrate, the copper row is electrically connected with the circuit on the substrate, and a screw hole is provided on the copper row to input the current signal The circuit is fixedly connected in the screw hole through the terminal block.

The substrate is an aluminum substrate, an insulating layer is arranged on the aluminum substrate, copper foil is covered on the insulating layer, and lines are etched on the copper foil.

The copper row is welded on the copper foil of the PCB.

Compared with the prior art, the PCB board of the utility model uses copper bars to realize large current input, and the size of the copper bars can be designed according to the requirements of the specific application environment. The maximum current that can pass is different depending on the size of the copper bars. Flexible design. The PCB board is provided with screw holes on the copper bar, which not only facilitates the installation of the input line, but also reduces the contact resistance between the input line and the PCB board, reduces heat generation, and improves energy utilization.

Description of drawings

    Fig. 1 is a schematic diagram of the PCB structure of the utility model.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the utility model will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

As shown in Figure 1, in this embodiment, the external current signal input terminal on the PCB board 10 is provided with a copper bar 20, the copper bar extends along the current direction, and a screw hole 22 is provided at the terminal 21 of the access end. Usually, in a battery management system, a large external current is input to the PCB board 10 through a very thick wire. Since the wire is relatively thick, direct soldering on the copper foil of the circuit board may easily cause the copper foil to fall off. In the utility model, by drilling and tapping the corresponding position of the copper bar 20, the input end of the high-current wire is equipped with a matching terminal, and the outside of the terminal is threaded, so that the wire can be fastened in the screw hole of the copper bar, not only It is easy to install, and can reduce contact resistance and heat generation.

The PCB board 10 of the utility model adopts aluminum material as the base plate, an insulating layer is arranged on the aluminum base plate, and copper foil is covered on the insulating layer. The copper foil is exposed at the position where a large current needs to pass, the shape of the exposed copper foil is consistent with the size of the copper bar 20, and then solder paste is brushed on the exposed copper foil, and then the copper bar is welded on the copper foil. In this embodiment, a copper bar is used at the current signal input end of the PCB board to introduce a large current. In practical applications, a copper bar can be similarly provided at any place where a large current passes through the PCB board. The aluminum plate substrate can quickly dissipate heat and reduce the temperature of high-current circuits.

Copper bars can conduct large currents, and different copper bars can pass currents of different sizes according to the needs of the circuit. For example, in the battery management system, the length of the copper bar can be set to 60-100mm, the width can be set to 10-20mm, and the height can be set to 10-20mm. Using a conductive copper bar of length × width × height = 100mm × 15mm × 15mm, the maximum current that can pass is about 300A.

It should be noted that any minor changes and equivalent replacements made without departing from the concept of the present utility model shall fall within the protection scope of the present utility model.

Claims (4)

1. A PCB board for a battery management system, including a base plate, characterized in that: a copper bar is arranged at the input end of the current signal on the base plate, the copper bar is electrically connected to the circuit on the base plate, screw holes are provided on the copper bar, and the current signal input line passes through The connection terminal is fixedly connected in the screw hole. 2 . The PCB board for a battery management system according to claim 1 , wherein the substrate is an aluminum substrate, an insulating layer is provided on the aluminum substrate, copper foil is covered on the insulating layer, and circuits are etched on the copper foil. 3. The PCB board for battery management system according to claim 2, characterized in that: the copper bars are welded on the copper foil of the PCB board. 4. The PCB board for a battery management system according to claim 3, wherein the length of the copper bar is 60-100mm, the width is 10-20mm, and the height is 10-20mm.