BDU unit, battery pack and vehicle

Abstract

The present disclosure relates to a BDU unit, a battery pack, and a vehicle, including a circuit board, a relay having a connection terminal extending in a thickness direction of the circuit board, and a connector having a first connection portion connected to the circuit board, a second connection portion connected to the circuit board, and a deformation portion connected to the circuit board. The second connecting part is connected with the connecting terminal, and the deformation part is used for adjusting the position of the second connecting part in the plate thickness direction through self deformation. According to the technical scheme, the BDU unit provided by the utility model can reduce the tolerance size matching requirement of relay installation.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, in particular to a BDU unit, a battery pack and a vehicle. BACKGROUND

[0002] In the related art, a BDU unit (Battery Disconnect Unit) is a working unit for high-voltage distribution, cutting, and short-circuit protection of a vehicle battery system. Currently, the BDU unit includes a relay, and the relay has a relatively high requirement for installation tolerance, which makes it difficult to install the relay. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present disclosure is to provide a BDU unit, a battery pack and a vehicle, which can reduce the tolerance size matching requirement of relay installation.

[0004] To achieve the above purpose, the present disclosure provides a BDU unit, comprising a circuit board, a relay and a connecting piece, the relay has a connecting terminal, the connecting terminal extends along the thickness direction of the circuit board, the connecting piece has a first connecting part, a second connecting part and a deformation part, the first connecting part is connected with the circuit board, the second connecting part is connected with the connecting terminal, and the deformation part is used to adjust the position of the second connecting part in the thickness direction by deforming itself.

[0005] Optionally, the first connecting part and the second connecting part are connected at an angle, and the bending part of the first connecting part and the second connecting part is configured as the deformation part.

[0006] Optionally, the first connecting part is made of a flexible material, and / or the second connecting part is made of a flexible material.

[0007] Optionally, the connecting piece is made of soft copper foil.

[0008] Optionally, the second connecting part is configured in a plate shape and extends along the thickness direction.

[0009] Optionally, the relay has a first side and a second side arranged oppositely in a direction perpendicular to the thickness direction, the first side is arranged closer to the center of the circuit board than the second side, and the first side is provided with a contact.

[0010] Optionally, the BDU unit further comprises a housing, the housing is provided with a connecting row, the relay is electrically connected with the connecting row and arranged between the housing and the circuit board.

[0011] Optionally, the relay is welded with the connecting row.

[0012] On the basis of the above technical solution, the battery pack provided by the present disclosure comprises the BDU unit.

[0013] On the basis of the above technical solution, the vehicle provided by the present disclosure comprises the battery pack.

[0014] Through the above technical solution, in the BDU unit provided by the present disclosure, the relay is connected with the circuit board through the connecting piece, and the connecting piece comprises the first connecting part, the second connecting part and the deformation part. In this way, even if the first connecting part and the second connecting part are connected with the relay and the circuit board respectively, the position of the second connecting part relative to the first connecting part can be adjusted by changing the shape of the deformation part, so that the position tolerance of the relay installation can be absorbed without damaging the structure of the connecting piece itself. In addition, the setting of the bending part can also absorb the stress between the circuit board and the relay due to impact or vibration, etc., and play a certain protective role on the circuit board and the relay.

[0015] Other features and advantages of the present disclosure will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the following specific embodiment, but do not constitute a limitation on the present disclosure. In the drawings:

[0017] Figure 1 is a structural schematic diagram of the battery disconnect unit provided by the embodiment of the present disclosure;

[0018] Figure 2 is another structural schematic diagram of the battery disconnect unit provided by the embodiment of the present disclosure;

[0019] Figure 3 is a structural schematic diagram of the circuit board provided by the embodiment of the present disclosure;

[0020] Figure 4 is a partial enlarged schematic diagram of the battery disconnect unit provided by the embodiment of the present disclosure;

[0021] Figure 5 is a structural schematic diagram of the relay provided by the embodiment of the present disclosure.

[0022] EXPLANATION OF REFERENCE NUMERALS

[0023] 1-BDU unit; 11-relay; 111-connection terminal; 112-contact; 12-circuit board; 121-center; 13-connecting piece; 131-first connecting part; 132-second connecting part; 133-deformation part; 14-housing; 15-connection row; 2-module. DETAILED DESCRIPTION

[0024] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to explain and illustrate the present disclosure, and are not intended to limit the present disclosure.

[0025] In the present disclosure, the orientation words such as "upper" and "lower" generally refer to the relative "upper" and "lower" in the direction of gravity when the corresponding components are in use, and the terms "first", "second", etc. are used to distinguish one element from another element, and do not have sequentiality and importance. In addition, in the following description, the same reference numerals in different drawings represent the same or similar elements unless otherwise explained. The above definitions are only used to explain and illustrate the present disclosure, and should not be understood as limiting the present disclosure.

[0026] In the related art, the relay of the BDU unit is generally arranged on the circuit board, and has a first surface and a second surface arranged oppositely in the thickness direction of the circuit board, wherein the second surface is welded with a conventional nickel sheet, and the first surface is provided with a connecting terminal plugged with the circuit board, and the connecting terminal extends along the thickness direction of the circuit board. Thus, due to the limitation of the plug-in connection mode, the tolerance requirement of the relay in the thickness direction of the circuit board is high, and it is not easy to weld and install.

[0027] In order to solve the above technical problems, according to the specific embodiments provided by the present disclosure, referring to Figures 1 to 5 The BDU unit is provided, which includes a circuit board 12, a relay 11 and a connecting piece 13. The relay 11 has a connecting terminal 111 extending along the thickness direction of the circuit board 12. The connecting piece 13 has a first connecting part 131, a second connecting part 132 and a deformation part 133. The first connecting part 131 is connected with the circuit board 12. The second connecting part 132 is connected with the connecting terminal 111. The deformation part 133 is used to adjust the position of the second connecting part 132 in the thickness direction by deforming itself.

[0028] According to the technical scheme, in the BDU unit provided by the present disclosure, the relay 11 is connected with the circuit board 12 through the connecting piece 13, and the connecting piece 13 comprises a first connecting part 131, a second connecting part 132 and a deformation part 133. In this way, even if the first connecting part 131 and the second connecting part 132 are connected with the relay 11 and the circuit board 12 respectively, the position of the second connecting part 132 relative to the first connecting part 131 can be adjusted by changing the shape of the deformation part 133, so that the position tolerance of the relay 11 can be absorbed without damaging the structure of the connecting piece 13 itself. In addition, the setting of the bending part can also absorb the stress between the circuit board 12 and the relay 11 due to impact or vibration, etc., and play a certain protective role for the circuit board 12 and the relay 11.

[0029] It should be explained here that since the deformation part 133 adjusts the position of the second connecting part 132 by deforming itself, the adjustment of the position of the second connecting part 132 is not only in the direction of the thickness of the plate. During the installation of the relay 11, the deformation part 133 can deform in any suitable direction according to actual needs, for example, in a direction perpendicular to the thickness of the plate, or a vector sum of multiple directions. Among them, the adjustment of the position in the direction of the thickness of the plate is because the connecting terminal 111 of the relay 11 extends in the direction of the thickness of the plate, and the relay 11 is connected between the circuit board 12 and the shell 14 of the BDU unit 1. Therefore, the copper bar is connected to the second surface of the relay 11, and the copper bar is connected to the shell 14 of the BDU unit 1. Under the premise that the connecting terminal 111 provided on the first surface of the relay 11 needs to be connected with the circuit board 12, the tolerance matching requirement of the relay 11 and the circuit board 12 in the direction of the thickness of the plate is higher, so the adjustment of the position of the second connecting part 132 in the direction of the thickness of the plate is particularly important.

[0030] In the BDU unit provided by the present disclosure, the connecting piece 13 can be constructed in any suitable form, and the present disclosure does not make specific limitations thereto. As an exemplary embodiment, reference is made to Figure 3As shown in the figure, the first connecting part 131 can be connected with the second connecting part 132 at an angle, and the bending parts of the first connecting part 131 and the second connecting part 132 can be configured as a deformation part 133. That is, the first connecting part 131 and the second connecting part 132 can be configured as an integral piece, one end of which is connected with the circuit board 12, and the other end is bent relative to the first end to form a bending part, which is formed with an included angle, so that when the position of the second connecting part 132 changes relative to the first connecting part 131, the bending part can be further bent or expanded to adapt to the change of the position of the second connecting part 132. Specifically, when the second connecting part 132 moves close to the first connecting part 131, the included angle of the bending part gradually decreases, and when the second connecting part 132 moves away from the first connecting part 131, the included angle of the bending part gradually increases. In this way, the arrangement of the bending part can provide the possibility of the change of the position of the second connecting part 132 relative to the first connecting part 131 without damaging the structure of the connecting piece 13 itself, while the connecting piece 13 is an integral piece.

[0031] In the present disclosure, the first connecting part 131 and the second connecting part 132 are arranged perpendicular to each other, and the bending part is formed with a 90° included angle. In other embodiments, the connecting piece 13 can also be configured to have a connected arc-shaped part and a main body part, the main body part is connected with one of the circuit board 12 and the connecting terminal 111, and the arc-shaped part is connected with the other one of the circuit board 12 and the connecting terminal 111. By changing the curvature of the arc-shaped part to adapt to the adjustment of the position of the main body part relative to the arc-shaped part, the same purpose of providing the possibility of the change of the position of the second connecting part 132 can also be achieved, which is not specifically limited in the present disclosure.

[0032] In the BDU unit provided in the present disclosure, as an exemplary embodiment, the first connecting part 131 can be made of a flexible material, and / or the second connecting part 132 can be made of a flexible material. In this way, the design of the flexible material enables the first connecting part 131 and the second connecting part 132 to deform in any suitable direction without damaging their own strength, thereby improving the range of position adjustment of the second connecting part 132.

[0033] On the basis of the above-mentioned embodiments, the connecting piece 13 can be made of any material, and the present disclosure does not make specific limitations in this regard. As an exemplary embodiment, the connecting piece 13 can be made of soft copper foil. In this way, the connecting piece 13 can ensure the conductive connection between the relay 11 and the circuit board 12, while also being able to adjust the position of the second connecting portion 132 connected to the relay 11 through its own deformation, so as to reduce the dimensional tolerance requirements for the installation of the relay 11. In addition, the arrangement of the soft copper foil can also absorb the stress between the circuit board 12 and the relay 11 due to impact or vibration, etc., thereby playing a certain protective role for the circuit board 12 and the relay 11. In addition, the arrangement of the soft copper foil can also eliminate the need for the arrangement of a wire harness between the circuit board 12 and the relay 11, thereby reducing the manufacturing cost of the BDU unit 1. In other embodiments, the connecting piece 13 can also be configured as a nickel sheet, and the dimensional tolerance requirements for the installation of the relay 11 can be reduced by adjusting the size of the nickel sheet, for example, by reducing the thickness or increasing the length of the nickel sheet, so as to reduce the structural strength of the nickel sheet, and the same purpose can also be achieved, and the present disclosure does not make specific limitations in this regard.

[0034] On the basis of the above-mentioned embodiments, with reference to Figure 2 , the second connecting portion 132 can be configured as a plate shape and extend along the plate thickness direction. This is because the connecting terminal 111 of the relay 11 is arranged to extend along the plate thickness direction of the circuit board 12, and therefore the second connecting portion 132 is configured as a plate shape, which can ensure the contact area between the connecting piece 13 and the connecting terminal 111 of the relay 11, and further ensure the reliability of the welding between the connecting piece 13 and the connecting terminal 111. The design of the second connecting portion 132 extending along the plate thickness direction can adjust the length of the second connecting portion 132 according to different actual conditions, so as to adjust the welding area between the connecting piece 13 and the connecting terminal 111.

[0035] In the BDU unit provided by the present disclosure, as an exemplary embodiment, with reference to Figure 2 and Figure 4 , the relay 11 has a first side and a second side arranged opposite to each other in a direction perpendicular to the plate thickness direction, and the first side can be arranged closer to the center 121 of the circuit board 12 than the second side, and the first side is provided with the contact 112. In the present disclosure, the relay 11 is arranged below the circuit board 12, and the first side of the relay 11 provided with the contact 112 is arranged towards the center 121 of the circuit board 12, so that the contact 112 is located between the body of the relay 11 and the circuit board 12, which can avoid damage to the contact 112 caused by external impact, thereby achieving protection for the contact 112 of the relay 11.

[0036] In the BDU unit provided by the present disclosure, as an exemplary embodiment, with reference to Figure 1 and Figure 2As shown in the figure, the BDU unit can further include a housing 14, and the housing 14 can be provided with a connecting strip 15, and the relay 11 can be electrically connected with the connecting strip 15 and arranged between the housing 14 and the circuit board 12. That is, the first surface of the relay 11 in the thickness direction of the circuit board 12 is connected with the circuit board 12 through the connecting piece 13 and the connecting terminal 111, and the second surface is connected with the housing 14 through the connecting strip 15, so that the relay 11 is fixed between the housing 14 and the circuit board 12. In the present disclosure, the relay 11 can be supported on the housing 14 and arranged below the circuit board 12, and the circuit board 12 can be provided with a recess for avoiding the connection port of the relay 11, so as to facilitate the connection between the connection port of the relay 11 and other components.

[0037] On the basis of the above-mentioned embodiments, the relay 11 can be electrically connected and fixed with the connecting strip 15 by any suitable manner, and the present disclosure does not make specific limitations thereon. As an exemplary embodiment, the relay 11 can be welded with the connecting strip 15, so that compared with the fastener connection mode such as bolt connection, welding can reduce the connection impedance between the relay 11 and the connecting strip 15, and avoid the problems such as high resistance of the BDU unit 1 due to bolt untwisting or deformation of the fastener, and further cause the temperature rise to increase.

[0038] On the basis of the above-mentioned technical solutions, the present disclosure further provides a battery pack comprising the above-mentioned BDU unit, and the battery pack can include a plurality of modules 2 connected in series or in parallel, and at least one of the plurality of modules 2 is electrically connected with the relay 11 in the BDU unit, wherein the BDU unit has all the technical features of the above-mentioned BDU unit, and thus is not described herein.

[0039] On the basis of the above-mentioned technical solutions, the present disclosure further provides a vehicle comprising the above-mentioned battery pack, and the battery pack can be a power battery pack of the vehicle, and the battery pack has all the technical features of the above-mentioned battery pack, and thus is not described herein.

[0040] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-mentioned embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0041] In addition, it should be noted that each specific technical feature described in the above-mentioned specific embodiments can be combined by any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure does not make further description on various possible combination manners.

[0042] Furthermore, the various embodiments of the present disclosure can be arbitrarily combined with each other unless they contradict each other, and it should be understood that the same should be construed as being included in the disclosure of the present disclosure.

Claims

1. A BDU unit, characterized by, The relay has connection terminals extending in a direction of a thickness of the circuit board, and the connecting member has a first connecting portion connected to the circuit board, a second connecting portion connected to the connection terminals, and a deformation portion for adjusting a position of the second connecting portion in the direction of the thickness by deforming itself.

2. The BDU unit of claim 1, wherein, The first connecting portion and the second connecting portion are connected at an angle, and a bending portion of the first connecting portion and the second connecting portion is configured as the deformation portion.

3. The BDU unit of claim 2, wherein, The first connecting portion is made of a flexible material, and / or the second connecting portion is made of a flexible material.

4. The BDU unit of claim 3, wherein, The connecting member is made of a soft copper foil.

5. The BDU unit of claim 1, wherein, The second connecting portion is configured in a plate shape and extends in the direction of the thickness.

6. The BDU unit of claim 1, wherein, The relay has first and second sides disposed opposite each other in a direction perpendicular to the direction of the thickness, the first side being disposed closer to a center of the circuit board than the second side, and the first side being provided with a contact.

7. The BDU unit of claim 1, wherein, The BDU unit further includes a housing provided with a connection row, the relay being electrically connected to the connection row and disposed between the housing and the circuit board.

8. The BDU unit of claim 7, wherein, The relay is welded to the connection row.

9. A battery pack, characterized by, A battery pack including the BDU unit according to any one of claims 1-8.

10. A vehicle characterized by comprising: A battery pack including the BDU unit according to claim 9.

Images