Collection board suitable for use in battery module box

Abstract

The utility model discloses an acquisition board suitable for use in a battery module box, which is characterized in that the acquisition board comprises a connector, an FPC (Flexible Printed Circuit), acquisition nickel sheets and a reinforcing board, the whole FPC is strip-shaped, the connector is arranged at the end part of the FPC, a plurality of acquisition nickel sheets are arranged on the two sides of the FPC along the length direction, and locking holes are formed in the end parts, far away from the FPC, of the acquisition sheets; a reinforcing plate is arranged on the other surface of the FPC soft plate positioned on the acquisition nickel sheet and the connector; a thermistor is mounted at the combination position of the acquisition nickel sheet and the FPC soft board; based on the characteristics of the hard circuit board and the flexible circuit board, the utility model designs the acquisition board which is light in weight, high in reliability, convenient to install and maintainable in combination with the PACK structure requirement of the power battery pack.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs PACK, and in particular relates to a collection board suitable for use in a battery module box. Background Art

[0002] A battery pack (PACK) is a battery manufacturing process that connects multiple lithium-ion cells in parallel and series, taking into account issues such as system mechanical strength, thermal management, and BMS compatibility. With the rapid development of the new energy vehicle industry and the transformation of the global energy structure, the market demand for battery packs will continue to grow.

[0003] In the current mass-produced power battery packs, voltage and temperature acquisition in the battery box are all done using wiring harnesses or rigid printed circuit boards. The wiring harnesses used for acquisition have disadvantages such as disordered wiring, poor product image, and inconvenient operation. While the rigid printed circuit board acquisition improves the product image, its weight accumulates heavily when used on a large scale, which is not conducive to improving the energy density of the battery pack. Summary of the Invention

[0004] The purpose of the utility model is to provide a collection board suitable for use in a battery module box, which can not only improve the product image, but also has the advantages of light weight, easy installation, high reliability and easy maintenance.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A collection board suitable for use in a battery module box, comprising a connector, an FPC board, a collection nickel sheet, and a reinforcement board. The FPC board is generally in the shape of a long strip, with a connector mounted on one end and several collection nickel sheets mounted on both sides along its length. The ends of the collection sheets away from the FPC board have locking holes. A reinforcement board is provided on the other side of the FPC board between the collection nickel sheets and the connector.

[0007] A thermistor is mounted at the junction of the nickel collecting sheet and the FPC soft board;

[0008] The FPC soft board is provided with a mounting hole;

[0009] The printed circuit of the FPC soft board includes a circuit starting from a connector and connected to a plurality of nickel collection sheets and a thermistor, and a fuse located between the connector and the starting nickel collection sheet.

[0010] Furthermore, the reinforcement plate is made of glass fiber epoxy resin copper clad laminate flame retardant material.

[0011] Furthermore, the edges of the four corners of the FPC are arc lines.

[0012] Further, the fuse includes a standby fuse and a main fuse, the main fuse is directly connected between the welding point of the connector and the collection nickel sheet, the standby fuse is connected with the collection nickel sheet at one end and connected with a maintenance pad at the other end, the maintenance pad includes an A pad connected with the welding point of the connector and a B pad connected with the standby fuse, and the standby fuse is started by connecting the A pad and the B pad when the collection circuit is short-circuited.

[0013] Further, the fuse adopts a snake-shaped copper foil fuse.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] (1) Based on the characteristics of the hard circuit board and the flexible circuit board, and combined with the PACK structure requirement of the power battery pack, a collection plate with light weight, high reliability, convenient installation and maintenance is designed.

[0016] (2) The product internal space is saved, and the finished product volume and weight are reduced. According to the PACK structure of the battery pack, FR4 reinforcement is designed in the local area (such as the locking position, the terminal connection position and the like) of the collection plate flexible circuit board, so that the FPC is not easy to deform, tear and the like, the connection nickel sheet is designed on the collection plate, voltage and temperature collection are simultaneously considered, copper foil is arranged on the FPC, the collection fuse copper foil is designed in the copper foil connected with the voltage collection point, the line is disconnected in time when short circuit and the like abnormity occurs, and the reliability of the product is improved.

[0017] (3) Considering economy and maintainability, the standby fuse copper foil and the short-circuit pad are designed, when the fuse copper foil is fused due to abnormality, the standby fuse copper foil is started by manual welding, and the entire collection plate does not need to be replaced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the utility model.

[0019] Figure 2 It is a side surface schematic view of the utility model.

[0020] Figure 3 It is a line design schematic view of the utility model.

[0021] Figure 4 It is Figure 3 It is an enlarged schematic view of the middle circular part.

[0022] Marked in the figure: 10, FPC soft plate; 11, connector; 12, collection nickel sheet; 13, locking hole; 14, thermistor; 15, circular arc line; 16, mounting hole; 20, enhanced version; 31, main fuse; 32, standby fuse; 33, maintenance pad. DETAILED DESCRIPTION

[0023] AsFigure 1 、 Figure 2 As shown, the present embodiment provides a collection board suitable for use in a battery module box, comprising a connector 11, an FPC board 10, a collection nickel sheet 12, and a reinforcement board. The FPC board 10 is in the shape of an elongated strip as a whole, with a connector 11 mounted on its end, and several collection nickel sheets 12 mounted on both sides along the length direction. A locking hole 13 is provided at the end of the collection sheet away from the FPC board 10, and the locking hole 13 is connected to the battery pole. The number of the collection nickel sheets 12 is related to the number of batteries in the battery pack and is used to collect the voltage information of the batteries.

[0024] A reinforcing plate is provided on the other side of the FPC soft board 10 between the nickel sheet 12 and the connector 11 to effectively enhance the reliability of the FPC and prevent it from breaking or tearing. The reinforcing plate in this embodiment is made of a flame-resistant glass fiber epoxy resin copper clad laminate.

[0025] A thermistor 14 is mounted at the junction of the nickel sheet 12 and the FPC board 10 to detect the temperature signal of the battery and realize the requirement of simultaneously collecting temperature and voltage.

[0026] The four corners of the FPC soft board 10 are chamfered to increase edge lines at the four corners to effectively prevent corner chipping and cracking. The four corners are preferably processed into arc lines 15, especially inner arc lines 15.

[0027] The FPC board 10 has mounting holes 16 at different positions for fixing the acquisition board.

[0028] like Figure 3 and 4 As shown, the printed circuit of the FPC soft board 10 includes a circuit starting from the connector 11 and connected to several collection nickel sheets 12 and the thermistor 14, and a fuse located between the connector 11 and the starting collection nickel sheet 12. The fuse adopts a serpentine copper foil fuse. The fuse in this embodiment includes a spare fuse 32 and a main fuse 31. The main fuse 31 is directly connected between the solder joint of the connector 11 and the collection nickel sheet 12. One end of the spare fuse line is connected to the collection nickel sheet 12, and the other end is connected to the maintenance pad 33. The maintenance pad 33 includes a pad A connected to the solder joint of the connector 11 and a pad B connected to the spare fuse line. When a short circuit occurs in the collection line, the main fuse 31 is disconnected, and the pads A and B are connected by soldering to start the work of the spare fuse 32.

[0029] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any modification and replacement based on the technical solution and utility model concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. A collection board suitable for use in a battery module box, characterized by: It comprises a connector, a FPC soft board, a collection nickel sheet and a reinforcing plate, the FPC soft board is in the shape of a long strip, a connector is installed on the end of the FPC soft board, a plurality of collection nickel sheets are installed on the two sides along the length direction, and a locking hole is opened on the end of the collection nickel sheet away from the FPC soft board; the other side of the FPC soft board between the collection nickel sheet and the connector is provided with a reinforcing plate; A thermistor is attached to the position where the collection nickel sheet is combined with the FPC soft board; The FPC soft board is provided with a mounting hole; The printed circuit of the FPC soft board comprises a circuit connected with the plurality of collection nickel sheets and the thermistor from the connector, and a fuse between the connector and the initial end collection nickel sheet; The fuse comprises a standby fuse and a main fuse, the main fuse is directly connected between the welding point of the connector and the collection nickel sheet, one end of the standby fuse is connected with the collection nickel sheet, and the other end is connected with a maintenance pad, the maintenance pad comprises an A pad connected with the welding point of the connector and a B pad connected with the standby fuse, the A pad and the B pad are connected to start the standby fuse when the collection circuit is short-circuited; the fuse adopts a snake-shaped copper foil fuse.

2. The collecting plate for use in a battery module case according to claim 1, wherein: The reinforcing plate is made of a glass fiber epoxy resin copper clad plate fire-resistant material.

3. The collecting plate for use in a battery module case according to claim 1, wherein: The edge lines of the four corners of the FPC soft board are circular arcs.

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