Holding device for power and signal conductors of a motor vehicle traction battery

Abstract

Holding device (15) for current and signal conductors of a traction battery of a motor vehicle, comprising a plate-like base body having longitudinal sides (16) and transverse sides (17) as well as a top (18) and bottom (19) extending between the longitudinal sides (16) and transverse sides (17), with elements (20) arranged on one side of the top (18) and bottom (19) for guiding and fixing current conductors (12) of the traction battery, wherein the current conductors (12) serve for the electrical interconnection of battery modules (10) of the traction battery, with elements (21) arranged on the other side of the top (18) and bottom (19) for guiding and fixing at least one signal conductor (14) of the traction battery, wherein the at least one signal conductor (14) is used for the transmission of data signals orserves for communication signals between the battery modules (10) or between the battery modules (10) and a control device of the traction battery, wherein the plate-like base body provides EMC shielding of the or each signal conductor (14) against the current conductors (12), wherein the plate-like base body has sections (22) on the opposite longitudinal sides (16) and / or on the opposite transverse sides (17) for fastening and grounding the holding device to a frame of the motor vehicle.

Description

[0001] The invention relates to a holding device for current and signal conductors of a traction battery of a motor vehicle.

[0002] Electric and hybrid vehicles are equipped with traction batteries. These traction batteries consist of numerous electrically interconnected battery modules. Each battery module contains numerous electrically interconnected battery cells. The interconnection of the traction battery modules is achieved using both electrical conductors and signal conductors. The electrical conductors are preferably configured as busbars and serve to transmit electrical energy from the traction battery to an electric motor of the vehicle. Furthermore, the busbars serve to transmit electrical energy from the electric motors back to the traction battery during the electric motor's generator operation.The signal conductors serve to transmit communication signals, in particular to provide voltage and temperature information about the battery modules for control and regulation purposes.

[0003] The electrical currents transmitted by the power conductors can cause unwanted electrical or electromagnetic effects that impair the transmission of communication signals via the signal conductors. Therefore, in conventional motor vehicles, the signal conductors are laid at a considerable distance from the power conductors.

[0004] However, sufficient spatial separation of power conductors and signal conductors is not always possible in all areas of a motor vehicle. In this case, shielded signal conductors are helpful.

[0005] However, the shielding of the signal conductor must be grounded. This requires contacting the shielding of the respective signal conductor with a ground potential. This is complex and prone to errors.

[0006] There is therefore a need for a holding device for the power and signal conductors of a motor vehicle traction battery that provides good shielding between the power conductors and at least one signal conductor, even with a small distance between them, using simple means. The object of the present invention is therefore to provide such a holding device.

[0007] This problem is solved by a holding device for current and signal conductors according to claim 1.

[0008] The holding device has a plate-like base body with longitudinal sides and transverse sides, as well as a top and bottom surface extending between the longitudinal and transverse sides.

[0009] Elements for guiding and fixing the traction battery's electrical conductors are arranged on one side of the top and bottom surfaces.

[0010] On the other side of the top and bottom surfaces, elements for guiding and fixing at least one signal conductor of the traction battery are arranged.

[0011] The plate-like base provides EMC shielding for each signal conductor against the power conductors.

[0012] The plate-like base body has sections on its opposite longitudinal sides and / or on its opposite transverse sides for attaching and grounding the holding device to a vehicle frame.

[0013] The holding device according to the invention allows for effective shielding of the power conductors from the signal conductor(s), even if the respective signal conductor runs at a relatively short distance from the power conductor. Shielded signal conductors are not required. It is not necessary to ground the shields of shielded signal conductors.

[0014] In an advantageous embodiment, the elements for guiding and fixing the conductors are positioned along the opposite longitudinal sides of the plate-like base. The sections for attaching and grounding the mounting device to the vehicle frame are preferably positioned along the opposite transverse sides of the plate-like base. The elements for guiding and fixing the signal conductor(s) extend parallel to the longitudinal sides of the plate-like base. This embodiment of the mounting device according to the invention is particularly preferred for effectively guiding both the conductors and the respective signal conductor, and for providing reliable shielding of the respective signal conductor from the conductors using simple means.

[0015] Preferred embodiments of the invention are described in the dependent claims and the following description. Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being limited thereto. The drawing shows: Fig. 1 a perspective view from a section of a motor vehicle in the area of ​​a holding device according to the invention for current and signal conductors of a traction battery of a motor vehicle; Fig. 2 a cross-section through Fig. l; Fig. 3 a detail of the Fig. 2.

[0016] Fig. Figure 1 shows a section of the body structure of a motor vehicle designed as an electric or hybrid vehicle in the area of ​​a traction battery, with the traction battery in Fig. 1 battery module 10 The battery modules are shown. 10are positioned in a battery housing of the traction battery, this battery housing preferably being part of the vehicle frame. This shows Fig. 1. Striving 11 , which are part of the vehicle frame and thus of the battery housing, and provide corresponding spaces for the battery modules 10 to train. This involves installing several battery modules in the front and rear sections of the vehicle. 10 positioned, also between the battery modules positioned in the front part of the vehicle and in the rear part of the vehicle 10 a battery module 10 is arranged in a way that connects with the other battery modules 10 Each battery module must be electrically and signal-wise connected. 10 features a modular housing 10a and battery cells 10b .

[0017] Fig. 1 and Fig. 2 show electrical conductors 12 , which are the electrical connections of the battery modules 10 especially by forming a series connection between the battery modules 10 serve. Thus, in Fig. 1 a first conductor 12 with a connection 13 to a first connection contact of a battery module 10 connected, another electrical conductor 12 is connected 13 at a second connection contact of the battery module 10 coupled. Furthermore, it shows Fig. 1 a third conductor 12 , which is located via the battery module 10 , to which the two other conductors 12 with their connections 13 are connected, extends.

[0018] Furthermore, they Fig. 1, Fig. 2 a signal conductor 14 This signal conductor 14It serves to transmit data signals or communication signals between the battery modules. 10 or between the battery modules and a control unit.

[0019] In the Fig. 1 and Fig. The configuration shown in point 2 is above the battery module. 10 a holding device according to the invention 15 positioned in Fig. 3 in cross-section in standalone representation together with the conductors 12 and the signal conductor 14 shown.

[0020] The holding device 15 It has a plate-like base body with longitudinal sides 16 and cross sides 17 Between the long sides 16 and the transverse sides 17 both a top side extends 18 as well as a subpage 19 of the plate-like base body 15 .

[0021] On one side of the top 18 and underside19 , in the illustrated embodiment on the upper side 18 , are elements 20 for guiding and fixing the electrical conductors 12 arranged.

[0022] These elements 20 are along the opposite long sides 16 of the plate-like base body positioned, with these elements 20 for guiding and fixing the electrical conductors 19 Threaded bolts 20a , and nuts 20b , which are connected to the threaded bolts 20a interact, and fastening sections 20c include.

[0023] The respective fastening sections 20c encompass the respective conductor 12 section by section.

[0024] The threaded bolts 20a extend through the fortification sections 20c for the respective conductor 12 through, whereby the nuts 20b the respective fastening section20c for the respective conductor 12 on the respective threaded bolt 20a fix.

[0025] On the other side of the top 18 and underside 19 of the plate-like base body, in the illustrated embodiment on the underside 19 , are elements for guiding and fixing the respective signal conductor 14 arranged, wherein the elements for guiding and fixing the respective signal conductor 14 parallel to the long sides 16 of the plate-like base body 15 extend. Thus, these elements include 21 on the one hand, one running parallel to the long sides 16 of the base body 15 extending guide channel 21a for guiding the respective signal conductor 14 and on the other hand, several in the guide channel 21a arranged fixing clips 21b , which the signal conductor 14 in the guide channel 21ahold. Along the longitudinal direction of the guide channel 21a Several such fixing clips are distributed throughout. 21b positioned.

[0026] The conductors 12 They therefore extend parallel to the long sides 16 the holding device 15 , likewise the respective signal conductor extends 14 parallel to the long sides 16 , however, with reference to the holding device or the plate-like base body on a different side of the top 18 and underside 19 further inside.

[0027] In addition to the elements 20 , 20a , 20b and 20c , which are used for guiding and fixing the electrical conductors 12 serve, as well as the elements 21 , 21a , 21b , which are used for guiding and fixing the respective signal conductor 14 The plate-like base body of the holding device serves this purpose. 15on the opposite long sides 16 and / or on the opposite transverse sides 17 , in the illustrated embodiment on both opposite transverse sides 17 , sections 22 for fastening and grounding the holding device to the frame of the motor vehicle, namely to the in Fig. 1 strut shown 11 of the motor vehicle. The holding device 15 It is therefore on both sides or ends where the signal conductor 14 from the guide channel 21a Exit, grounded. Securing and grounding at both sides or ends significantly increases the reliability of the grounding system. Should the respective section on one side or end... 22 If the fastening and grounding of the holding device should unintentionally detach, the section arranged at the other end ensures 22 still a fastening and grounding of the holding device.

[0028] The plate-like base body of the holding device 15 is preferably made of metal and therefore electrically conductive material. The conductors are also... 12 The fastening sections are made of metal and are therefore electrically conductive. 20c for the conductors 12 However, they are made of an electrically non-conductive material.

[0029] The invention presented here therefore proposes a holding device 15 for high-voltage conductors 12 and low-voltage signal conductors 14 a traction battery of a motor vehicle, which on the one hand serves to guide and fix the conductors, preferably designed as busbars 12 , the guidance and fixing of the respective signal conductor 14 and the shielding of the signal conductor 14 opposite the power conductors 12It serves to provide EMC shielding for the respective signal conductor. The holding device according to the invention 15 It is structurally simple and allows for effective shielding of the respective signal conductor. 14 .

Claims

[1] Holding device (15) for current and signal conductors of a traction battery of a motor vehicle, with a plate-like base body having longitudinal sides (16) and transverse sides (17) as well as a top (18) and bottom (19) extending between the longitudinal sides (16) and transverse sides (17), with elements (20) arranged on one side of the top (18) and bottom (19) for guiding and fixing electrical conductors (12) of the traction battery, with elements (21) arranged on the other side of the top (18) and bottom (19) for guiding and fixing at least one signal conductor (14) of the traction battery, wherein the plate-like base body provides EMC shielding of the signal conductor(s) (14) against the current conductors (12), wherein the plate-like base body has sections (22) on the opposite longitudinal sides (16) and / or on the opposite transverse sides (17) for fastening and grounding the holding device to a frame of the motor vehicle. [2] Holding device according to claim 1, characterized by that the frame of the motor vehicle forms a housing for the traction battery. [3] Holding device according to claim 1 or 2, characterized by , that the elements (20) for guiding and fixing the conductors (12) are positioned along the opposite longitudinal sides (16) of the plate-like base body. [4] Holding device according to any one of claims 1 to 3, characterized by , that the elements (20) for guiding and fixing the conductors (12) comprise threaded bolts (20a) which extend through fixing points (12a) of the respective conductor (12). [5] Holding device according to claim 4, characterized by, that the threaded bolts (20a) interact with nuts (20b) which fix the respective conductor (12) to the respective threaded bolt (20a). [6] Holding device according to any one of claims 1 to 5, characterized by , that the sections (22) for fastening and grounding the holding device to the frame of the motor vehicle are positioned along the opposite transverse sides (17) of the plate-like base body. [7] Holding device according to any one of claims 1 to 6, characterized by , that the elements (21) for guiding and fixing the or each signal conductor (14) extend parallel to the longitudinal sides (16) of the plate-like base body. [8] Holding device according to claim 7, characterized by, the elements (21) for guiding and fixing the or each signal conductor (14) comprise a guide channel (21a) extending parallel to the longitudinal sides (16) of the plate-like base body and several fixing clips (21b) arranged in the guide channel (21a). [9] Holding device according to any one of claims 1 to 8, characterized by that the plate-like base body is metallic.

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