Bridging connection structure and power battery integrated busbar

Abstract

The utility model discloses a bridging connection structure and a power battery integrated busbar, and belongs to the technical field of battery busbars. The bridging connection structure comprises a middle piece and tail pieces, the middle piece is of an arched structure, the two tail pieces are installed at the two ends of the middle piece, the thickness of the tail pieces is smaller than that of the middle piece, the tail pieces are provided with extension parts, the extension parts extend in the direction away from the middle piece, and the extension parts are used for being connected with a battery cell or a circuit board. According to the utility model, the middle piece and the tail piece form the bridging connection structure, so that the thickness of the tail piece is smaller than that of the middle piece, and the extension part of the small-thickness tail piece is connected with the battery cell or the circuit board, so that the tail thickness of the bridging connection structure is reduced, and the problem that the tail of the bridging piece is too thick and occupies a large space in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of battery busbar, specifically a cross connection structure and power battery integrated busbar. BACKGROUND

[0002] The design of the battery module can provide higher voltage and capacitance to meet the application requirements of different power. The module design considers the integrity, safety, cost-effectiveness and various application requirements of the battery system. The battery module is usually connected in series or parallel to form different arrangement modes to meet various application requirements.

[0003] The battery module integrated busbar is composed of FPC / FDC / FFC / FCC, gasket, injection molded structural parts and effective electrical connection, which is used for connecting batteries, transmitting battery module voltage and temperature signals, and serving as the core part of the power battery safety monitoring center. It plays an important role in new energy battery systems and ensures the safety and efficient operation of the battery.

[0004] The existing power battery is highly integrated, and multiple groups of battery cells are assembled in a single module. The series and parallel connection between the battery cells is realized by the cross gasket between each group of battery cells, and the battery assembly structure with large power is realized. The cross gasket of the prior art is a structure with the same thickness, and there is a problem of large space occupation at the tail of the cross gasket. INVENTION CONTENTS

[0005] The utility model discloses a cross connection structure and power battery integrated busbar, which is composed of a middle gasket and a tail gasket, so that the thickness of the tail gasket is less than that of the middle gasket, and the thickness of the tail of the cross connection structure is reduced.

[0006] The technical scheme of the utility model is as follows: in the first aspect, a cross connection structure comprises a middle gasket and a tail gasket.

[0007] The middle gasket is an arch structure, and the two tail gaskets are installed at both ends of the middle gasket. The thickness of the tail gasket is less than that of the middle gasket.

[0008] The tail gasket is provided with an extension part, which extends away from the middle gasket. The extension part is used for connecting the battery cell or the circuit board.

[0009] In a further embodiment of the first aspect, the middle part of the middle gasket is in an arc shape, a "V" shape or a "N" shape.

[0010] In a further embodiment of the first aspect, the extension part of the tail gasket is provided with a position avoiding hole. The position avoiding hole can avoid other parts during installation and facilitate observation of the installation position.

[0011] In a further embodiment of the first aspect, the extension of the tail piece is provided with a positioning hole for assisting in positioning the tail piece when welding the middle piece and the tail piece.

[0012] In a further embodiment of the first aspect, the thickness of the tail piece is 0.5-2mm.

[0013] The thickness of the middle piece is 1-5mm.

[0014] In a further embodiment of the first aspect, the tail piece is installed on the side away from the arch of the middle piece, which can increase the height of the arch bottom of the cross-connection structure.

[0015] In another embodiment of the first aspect, the tail piece is installed on the side close to the arch of the middle piece, which can reduce the overall height of the cross-connection structure.

[0016] In a second aspect, the power battery integrated busbar comprises a temperature / voltage acquisition FPC circuit board, a connecting piece, a cross-connection piece, an upper insulating film and a lower insulating film.

[0017] The cross-connection piece is the cross-connection structure of the first aspect, and the thickness of the tail piece of the cross-connection piece is equal to the thickness of the connecting piece.

[0018] Two temperature / voltage acquisition FPC circuit boards correspond to two rows of connecting pieces, and the two temperature / voltage acquisition FPC circuit boards are connected together by a cross-connection piece at the tail, and the upper insulating film and the lower insulating film are arranged on the upper and lower sides of the temperature / voltage acquisition FPC circuit board, so that the thickness of the temperature / voltage acquisition FPC circuit board and the connecting part of the tail piece and the connecting piece is equal.

[0019] The application has the beneficial effects that: the cross-connection structure composed of the middle piece and the tail piece makes the thickness of the tail piece smaller than the thickness of the middle piece, and the extension of the tail piece with small thickness is connected to the battery cell or the circuit board, which reduces the thickness of the tail piece of the cross-connection structure and solves the problem of large space occupation of the tail piece of the cross-connection piece in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the isometric view of the cross-connection structure composed of the middle piece and the tail piece of the utility model.

[0021] Figure 2 is the exploded view of the embodiment of the cross-connection structure for the power battery integrated busbar of the utility model.

[0022] The figure shows the following reference signs: middle tab 1, tail tab 2, avoidance hole 21, positioning hole 22, connecting tab 3, temperature / voltage acquisition FPC circuit board 4, upper insulating film 5, lower insulating film 6. DETAILED DESCRIPTION

[0023] In the following description, numerous specific details are set forth to provide a more thorough understanding of the present application. However, it will be apparent to one of skill in the art that the present application can be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present application.

[0024] The application discloses a cross-connection structure and a power battery integrated busbar, which comprises a middle tab and a tail tab, and the thickness of the tail tab is less than that of the middle tab, thereby reducing the thickness of the tail tab of the cross-connection structure.

[0025] In a first aspect, as shown in the cross-connection structure comprises a middle tab 1 and a tail tab 2. Figure 1

[0026] The middle tab 1 is an arch structure, wherein the middle part of the middle tab 1 is an arch structure formed in an arc shape, a "V" shape or a "N" shape as shown. Figure 1

[0027] Two tail tabs 2 are installed at both ends of the middle tab 1, and the connection between the middle tab 1 and the tail tab 2 is achieved by a multi-mode laser welding process. The multi-mode laser welding has high energy density, small heat input, fast welding speed and small heat-affected zone, and is excellent in welding of micro parts and parts with poor accessibility. The welding process realizes the structure of thin plate superimposed on thick plate.

[0028] The thickness of the tail tab 2 is less than that of the middle tab 1, wherein the thickness of the tail tab 2 is 0.5-2 mm, and the thickness of the tail tab 2 is selected according to the connecting tab 3 of the integrated busbar; the thickness of the middle tab 1 is 1-5 mm, and the thickness of the middle tab 1 can be adjusted according to the current carrying requirement, so that the thickness of the middle tab 1 at least meets the minimum requirement of current carrying.

[0029] The tail tab 2 is provided with an extension part, which extends away from the middle tab 1, and the extension part is used for connecting a battery cell or a circuit board, wherein, as shown in the tail tab 2, the extension part is provided with an avoidance hole 21, and the extension part of the tail tab 2 is also provided with a positioning hole 22. Figure 1

[0030] As shown in the connection between the middle tab 1 and the tail tab 2, the tail tab 2 is installed on the side away from the arch of the middle tab 1. Figure 1

[0031] ​​​​In another embodiment, the tail tab 2 can also be installed near the side of the middle tab 1 arch.

[0032] In a second aspect, as Figure 2 The cross-connection structure shown is used for power battery integrated busbar, which includes: temperature / voltage acquisition FPC circuit board 4, connecting tab 3, cross tab, upper insulating film 5 and lower insulating film 6.

[0033] The cross tab is the cross-connection structure of the first aspect, and the thickness of the tail tab 2 of the cross tab is equal to the thickness of the connecting tab 3.

[0034] Two temperature / voltage acquisition FPC circuit boards 4 correspond to two rows of connecting tabs 3, and a cross tab is connected at the tail of the two temperature / voltage acquisition FPC circuit boards 4. The upper insulating film 5 and the lower insulating film 6 are respectively arranged on the upper and lower sides of the temperature / voltage acquisition FPC circuit board.

[0035] As described above, although the present application has been shown and described with reference to certain preferred embodiments, it is to be understood that such is by way of illustration and not of limitation. Various substitutions and modifications can be made without departing from the spirit and scope of the present application as defined in the appended claims.

Claims

1. A bridging connection structure, characterized in that, The application relates to a connecting structure of a temperature / voltage acquisition FPC circuit board. The connecting structure comprises a middle connecting piece and tail connecting pieces. The middle connecting piece is an arch structure, and the two tail connecting pieces are arranged at the two ends of the middle connecting piece. The thickness of the tail connecting pieces is smaller than that of the middle connecting piece.

2. The jumper connection structure according to claim 1, wherein The tail connecting pieces are provided with extension parts which extend away from the middle connecting piece.

3. The jumper connection structure of claim 1, wherein The extension parts are used for connecting battery cells or circuit boards.

4. The jumper connection structure of claim 1, wherein The middle part of the middle connecting piece is in an arc shape, a V shape or a U shape.

5. The jumper connection structure of claim 1, wherein The extension part of the tail connecting piece is provided with a position avoiding hole. The extension part of the tail connecting piece is provided with a positioning hole.

6. The jumper connection structure of claim 1, wherein The thickness of the tail connecting piece is 0.5-2 mm.

7. The jumper connection structure of claim 1, wherein The thickness of the middle connecting piece is 1-5 mm.

8. A power battery integrated busbar, characterized in that, The tail connecting piece is arranged on the side away from the arch of the middle connecting piece. The tail connecting piece is arranged on the side close to the arch of the middle connecting piece. The application relates to a connecting structure of a temperature / voltage acquisition FPC circuit board. The connecting structure comprises a temperature / voltage acquisition FPC circuit board, connecting pieces, a cross connecting piece, an upper insulating film and a lower insulating film. The cross connecting piece is the cross connecting structure as claimed in any one of claims 1-7. The thickness of the tail connecting piece of the cross connecting piece is equal to that of the connecting piece. Two temperature / voltage acquisition FPC circuit boards are used for connecting two rows of connecting pieces. The two temperature / voltage acquisition FPC circuit boards are connected together by a cross connecting piece at the tail parts. The upper insulating film and the lower insulating film are arranged on the upper side and the lower side of the temperature / voltage acquisition FPC circuit board respectively.

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