Connection structure and electrical module

Abstract

The utility model discloses a kind of connecting structure and electrical module, it is related to cable technical field, wherein, connecting structure is used to one side connection electrical shell, the other side connection wire harness, connecting structure includes terminal and resonance adjustment structure, the one side of terminal is used to with the shielding layer of the wire harness Electric connection, the other side is used to with the electrical shell Electric connection, to the shielding layer ground connection;The resonance adjustment structure is used to with the shielding layer, the terminal and the electrical shell series connection arrangement, to reduce the resonance amplitude value of the shielding layer.The technical scheme provided by the utility model reduces the inherent resonance amplitude value of the shielding layer of wire harness, avoids electromagnetic interference problem.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a connection structure and electrical module. Background Technology

[0002] In fields such as vehicles, medical, and military industries, high-power high-voltage wiring harnesses often use shielded cables. Shielded cables consist of a central conductor located at the center and a shielding layer wrapped around the central conductor. The shielding layer protects the power signal inside the central conductor from external interference and prevents the high-voltage signal carried by the central conductor from interfering with the outside world.

[0003] Shielded cables can be connected to electrical components such as battery packs and motor controllers. When connecting shielded cables to electrical components, the shielding layer is overlapped with the casing of the electrical component to ground the shielded cable.

[0004] Due to the presence of distributed parameters, the existing shielding layer of the cable has an inherent resonant frequency. When an external excitation is applied, the cable's own resonance phenomenon will result in extremely high amplitudes at the resonant frequency points in the frequency spectrum, easily leading to failure of electromagnetic compatibility-related tests. Utility Model Content

[0005] The main purpose of this invention is to propose a connection structure and electrical module that aims to reduce the inherent resonance amplitude of the wire harness shielding layer and avoid electromagnetic interference problems.

[0006] To achieve the above objectives, the present invention proposes a connection structure for connecting an electrical housing on one side and a wiring harness on the other side, comprising:

[0007] A terminal block, one side of which is used for electrical connection to the shielding layer of the wire harness, and the other side is used for electrical connection to the electrical housing to ground the shielding layer; and

[0008] A resonant adjustment structure is provided, which is connected in series with the shielding layer, the wiring terminal and the electrical housing to reduce the resonant amplitude of the shielding layer.

[0009] In one embodiment, the resonant adjustment structure includes an impedance-controllable conductive material, and the terminal includes a claw for electrical connection with the shielding layer. At least one of the shielding layer and the claw is provided with the impedance-controllable conductive material.

[0010] In one embodiment, the resonant adjustment structure includes an impedance-controlled conductive material, and at least one of the connection between the electrical housing and the terminal block and the connection between the terminal block and the electrical housing is provided with the impedance-controlled conductive material.

[0011] In one embodiment, the impedance-controllable conductive material is configured as any one of conductive adhesive, conductive pad, conductive rubber, and conductive cloth; and / or

[0012] The conductivity doping rate or volume of the impedance-controllable conductive material is adjustable.

[0013] In one embodiment, the resonant adjustment structure includes a filter, an inductor assembly and a capacitor assembly are provided on the PCB substrate of the filter, and the terminal block includes a claw for electrical connection with the shielding layer, the claw being electrically connected to the filter.

[0014] In one embodiment, the resonant adjustment structure includes a filter, on which an inductor and a capacitor are provided, and the filter is electrically connected to the terminal block and the electrical housing.

[0015] In one embodiment, the filter includes multiple sets of the inductor components and multiple sets of the capacitor components.

[0016] In one embodiment, the terminal block further includes a metal fastener electrically connected to the claw and used to lock onto the electrical housing so that the terminal block is electrically connected to the electrical housing.

[0017] In one embodiment, the resonant adjustment structure is provided in a set, and the resonant adjustment structure is connected in series between the shielding layer and the terminal block; or, the resonant adjustment structure is connected in series between the terminal block and the electrical housing.

[0018] Alternatively, the resonant adjustment structure may be provided in two sets: one resonant adjustment structure is connected in series between the shielding layer and the terminal block, and the other resonant adjustment structure is connected in series between the terminal block and the electrical housing.

[0019] In one embodiment, when the resonant adjustment structure is provided in two sets, both resonant adjustment structures are configured as impedance-controllable conductive materials; or, both resonant adjustment structures are configured as filters; or, one resonant adjustment structure is configured as an impedance-controllable conductive material, and the other resonant adjustment structure is configured as a filter.

[0020] This utility model also proposes an electrical module, comprising:

[0021] Electrical components, equipped with electrical housings;

[0022] wire harness; and

[0023] The connection structure is described above, with one side connected to the electrical housing and the other side connected to the wiring harness.

[0024] The technical solution of this utility model incorporates a terminal block and a resonant adjustment structure in the connection structure. One side of the terminal block is electrically connected to the shielding layer of the wire harness, and the other side is electrically connected to the electrical housing to ground the shielding layer. The resonant adjustment structure is connected in series with the shielding layer, the terminal block, and the electrical housing to reduce the resonant amplitude of the shielding layer. Thus, compared to existing technologies, this utility model controls the equivalent resistance value in the equivalent circuit of the shielding layer by connecting the resonant adjustment structure in series within the electrical path formed by the shielding layer, the terminal block, and the electrical housing. This reduces the inherent resonant amplitude of the shielding layer, avoids electromagnetic interference problems, and ensures the electromagnetic compatibility of the connection structure. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of an electrical module in the prior art;

[0027] Figure 2 for Figure 1 Equivalent circuit diagram of shielded cable;

[0028] Figure 3 This is a schematic diagram of the structure of an embodiment of the electrical module provided by this utility model;

[0029] Figure 4 This is a structural schematic diagram of another embodiment of the electrical module;

[0030] Figure 5 This is a structural schematic diagram of yet another embodiment of the electrical module;

[0031] Figure 6 This is a structural schematic diagram of another embodiment of the electrical module.

[0032] Explanation of icon numbers:

[0033] 100. Wire harness; 110. Center conductor; 200. Shielding layer;

[0034] 300. Terminal blocks; 310. Metal fasteners;

[0035] 400. Electrical components; 410. Electrical housing;

[0036] 500. Resonant adjustment structure; 510. Impedance-controllable conductive material; 520. Filter.

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] In fields such as vehicles, medical, and military industries, high-power high-voltage wiring harnesses often use shielded cables. Shielded cables consist of a central conductor located at the center and a shielding layer wrapped around the central conductor. The shielding layer protects the power signal inside the central conductor from external interference and prevents the high-voltage signal carried by the central conductor from interfering with the outside world.

[0042] Shielded cables can be connected to electrical components such as battery packs and motor controllers. When connecting shielded cables to electrical components, the shielding layer is overlapped with the casing of the electrical component to ground the shielded cable.

[0043] Due to the presence of distributed parameters, the existing shielding layer of the cable has an inherent resonant frequency. When an external excitation is applied, the cable's own resonance phenomenon will result in extremely high amplitudes at the resonant frequency points in the frequency spectrum, easily leading to failure of electromagnetic compatibility-related tests.

[0044] This utility model proposes a connection structure.

[0045] Please see Figures 3 to 6 In one embodiment of the present invention, the connection structure includes a terminal block 300 and a resonance adjustment structure 500. One side of the terminal block 300 is used to electrically connect to the shielding layer 200 of the wire harness 100, and the other side is used to electrically connect to the electrical housing 410 to ground the shielding layer 200. The resonance adjustment structure 500 is used to be connected in series with the shielding layer 200, the terminal block 300 and the electrical housing 410 to reduce the resonance amplitude of the shielding layer 200.

[0046] Understandably, the connection structure is used to connect the wiring harness 100 and the electrical housing 410, where the electrical housing 410 refers to the outer shell of the electrical component 400, which can be a battery pack, motor controller, etc. There is no limitation on the type of electrical component 400. That is, the connection structure can be applied to battery systems, electronic control systems, etc., and there is no limitation on the application scenarios of the connection structure.

[0047] The wiring harness 100 includes a center conductor 110, and a shielding layer 200 is wrapped around the outside of the center conductor 110. Generally, the housing of the terminal block 300 is an insulating component. The center conductor 110 of the wiring harness 100 passes through the housing of the terminal block 300 and directly enters the interior of the electrical component 400 to make electrical connection with the electrical components inside the electrical component 400. At the same time, the terminal block 300 is also provided with a conductive component. The shielding layer 200 is electrically connected to the terminal block 300 through the conductive component. The conductive component is also electrically connected to the electrical housing 410, thereby grounding the shielding layer 200.

[0048] Understandable, such as Figure 1 As shown, the high-voltage, high-power wiring harness 100 typically uses shielded cables. The cable's shielding layer 200 itself has distributed inductance and distributed capacitance to ground. Its equivalent circuit is as follows: Figure 2 As shown in the figure. Where L is the equivalent inductance of the circuit between the shielding layer 200 and the ground, C is the distributed capacitance of the shielding layer 200 to the ground, and R is the equivalent resistance of the circuit formed by the shielding layer 200 and the ground.

[0049] For the component with frequency ω in the external voltage excitation, the output voltage and input voltage in this circuit satisfy the following:

[0050]

[0051] For an excitation component with frequency ωf, then:

[0052]

[0053] Currently, to achieve grounding of the shielding layer 200, the existing technical solution connects the shielding layer 200 to the electrical housing 410 via the terminal block 300, and then grounds it through the electrical housing 410. The equivalent resistance R of this circuit mainly consists of the shielding layer's own resistance, the resistance at the connection point, the equivalent resistance of the electrical housing, and the ground circuit resistance; its resistance value is extremely small and uncontrollable. Therefore, from the above formula, we can know that v out The frequency containing the largest amplitude is ω f The concentration of this component can easily cause the product to fail the electromagnetic compatibility test at that frequency.

[0054] Therefore, a resonant adjustment structure 500 is provided in this utility model. The resonant adjustment structure 500 is connected in series in the electrical path formed by the shielding layer 200, the terminal block 300 and the electrical housing 410. The resonant adjustment structure 500 controls the value of the equivalent resistance R, thereby reducing the inherent resonant amplitude of the shielding layer 200, avoiding electromagnetic interference problems and ensuring the electromagnetic compatibility of the connection structure.

[0055] Please see Figure 3 In an embodiment of this utility model, the resonant adjustment structure 500 includes an impedance-controllable conductive material 510, and the terminal block 300 includes a claw (not shown) for electrical connection with the shielding layer 200. At least one of the end of the shielding layer 200 connected to the claw and the claw is provided with the impedance-controllable conductive material 510.

[0056] Specifically, in one embodiment, the resonant adjustment structure 500 includes an impedance-controllable conductive material 510. It is understood that the terminal 300 includes a claw, configured as a metal piece, for connecting to the shielding layer 200, both fixing and electrically connecting to it. In one embodiment, the impedance-controllable conductive material 510 is connected in series between the shielding layer 200 and the terminal 300. More specifically, the impedance-controllable conductive material 510 is provided at the location where the shielding layer 200 connects to the claw and / or on the claw. In one embodiment, the impedance-controllable conductive material 510 can be applied to the shielding layer 200 and / or the claw by coating or wrapping.

[0057] Here, no restrictions are placed on the specific structure, location, or number of the claws, as long as they can achieve fixation and electrical connection with the shielding layer 200.

[0058] Please see Figure 4In another embodiment, an impedance-controlled conductive material 510 is connected in series between the terminal block 300 and the electrical housing 410. At least one of the connection points between the electrical housing 410 and the terminal block 300 and the electrical housing 410 is provided with the impedance-controlled conductive material 510. That is, the impedance-controlled conductive material 510 can be provided on the electrical housing 410, on the terminal block 300, or on both, as long as the connection point between the terminal block 300 and the electrical housing 410 is provided with the impedance-controlled conductive material 510. Specifically, the impedance-controlled conductive material 510 can be provided by coating or wrapping.

[0059] In embodiments of this invention, the impedance-controllable conductive material 510 is configured as any one of conductive adhesive, conductive pad, conductive rubber, and conductive cloth. The specific material of the impedance-controllable conductive material 510 is not limited here.

[0060] In embodiments of this invention, the conductivity doping rate or volume of the impedance-controllable conductive material 510 is adjustable. It is understood that the resistance value of the impedance-controllable conductive material 510 can be controlled by adjusting its conductivity doping rate or volume, thereby reducing the resonant amplitude of the shielding layer 200. Specifically, the conductivity doping rate is inversely proportional to the resistance value, the length of the impedance-controllable conductive material 510 is directly proportional to the resistance value, and the cross-sectional area of ​​the impedance-controllable conductive material 510 is inversely proportional to the resistance value. This can be adjusted according to the specific requirements of the electrical component 400.

[0061] Please see Figure 5 In an embodiment of this utility model, the resonant adjustment structure 500 includes a filter 520. The PCB substrate of the filter 520 is provided with an inductor component and a capacitor component. The terminal block 300 includes a claw for electrical connection with the shielding layer 200. The claw is electrically connected to the filter 520.

[0062] Specifically, in one embodiment, the resonant adjustment structure 500 includes a filter 520, which includes a PCB substrate on which an inductor and a capacitor are disposed. In one embodiment, the filter 520 is connected in series between the shielding layer 200 and the terminal block 300. More specifically, the metal claws of the terminal block 300 are electrically connected to the shielding layer 200 and also extend to the filter 520 for electrical connection. It is understood that the filter 520 includes both an inductor and a capacitor, thus allowing control of the equivalent resistance in the equivalent circuit of the shielding layer 200, thereby reducing the resonant amplitude of the shielding layer 200.

[0063] Please see Figure 6In another embodiment, the filter 520 is connected in series between the terminal block 300 and the electrical housing 410, that is, the filter 520 electrically connects the terminal block 300 and the electrical housing 410. It is understood that in one embodiment, the terminal block 300 further includes a metal fastener 310, which is electrically connected to a claw and used to lock onto the electrical housing 410, thereby electrically connecting the terminal block 300 and the electrical housing 410. Specifically, the terminal block 300 has a first connection hole, and the electrical housing 410 has a second connection hole. The metal fastener 310 passes through the first connection hole and locks onto the second connection hole, thereby fixing the terminal block 300 to the electrical housing 410. Simultaneously, the metal fastener 310 also achieves the electrical connection between the terminal block 300 and the electrical housing 410. In one embodiment, the claw of the terminal block 300 extends to the metal fastener 310, so that the claw is electrically connected to the metal fastener 310, thereby achieving the electrical connection between the shielding layer 200, the terminal block 300, and the electrical housing 410. That is, in this embodiment, the conductive elements on the terminal 300 mentioned above include claws and metal fasteners 310. When the filter 520 is disposed between the terminal 300 and the electrical housing 410, in one embodiment, the filter 520 is electrically connected to the metal fasteners 310 of the terminal 300.

[0064] In an embodiment of this invention, the filter 520 includes multiple sets of inductor components and multiple sets of capacitor components. Thus, by soldering different inductors and capacitors onto the PCB substrate, impedance controllability is achieved, thereby reducing the resonant amplitude of the shielding layer 200.

[0065] In an embodiment of this utility model, a set of resonant adjustment structures 500 is provided, wherein the resonant adjustment structures 500 are connected in series between the shielding layer 200 and the terminal block 300, or the resonant adjustment structures 500 are connected in series between the terminal block 300 and the electrical housing 410.

[0066] Alternatively, the resonant adjustment structure 500 may be provided in two sets: one resonant adjustment structure 500 is connected in series between the shielding layer 200 and the terminal block 300, and the other resonant adjustment structure 500 is connected in series between the terminal block 300 and the electrical housing 410.

[0067] Understandably, the resonant adjustment structure 500 can be configured with one set or two sets. When the resonant adjustment structure 500 is configured with one set, such as... Figures 3 to 6As shown, the resonant adjustment structure 500 can be connected in series between the shielding layer 200 and the terminal block 300, or in series between the terminal block 300 and the electrical housing 410. When two sets of the resonant adjustment structure 500 are provided, the two sets of resonant adjustment structures 500 are respectively provided between the shielding layer 200 and the terminal block 300, and between the terminal block 300 and the electrical housing 410. Of course, in other embodiments, the resonant adjustment structure 500 can also be provided in three sets, of which two sets are connected in series between the shielding layer 200 and the terminal block 300, and the two sets of resonant adjustment structures 500 are respectively an impedance-controllable conductive material 510 and a filter 510; and one set is connected in series between the terminal block 300 and the electrical housing 410. Alternatively, one set is connected in series between the shielding layer 200 and the terminal block 300; and two sets are connected in series between the terminal block 300 and the electrical housing 410, and the two sets of resonant adjustment structures 500 are respectively an impedance-controllable conductive material 510 and a filter 510. Specifically, the number and types of resonant adjustment structures 500 can be set according to specific needs, and there are no restrictions here.

[0068] In embodiments of this utility model, when two sets of resonant adjustment structures 500 are provided, both resonant adjustment structures 500 are configured as impedance-controllable conductive materials 510; or, both resonant adjustment structures 500 are configured as filters 520; or, one resonant adjustment structure 500 is configured as impedance-controllable conductive material 510, and the other resonant adjustment structure 500 is configured as a filter 520.

[0069] Understandably, in this invention, the resonant adjustment structure 500 can be either an impedance-controllable conductive material 510 or a filter 520. When two sets of resonant adjustment structures 500 are provided, both sets of resonant adjustment structures 500 can be either impedance-controllable conductive materials 510 or filters 520, or one can be an impedance-controllable conductive material 510 and the other a filter 520. This improves the ease of setting up the resonant adjustment structure 500.

[0070] This utility model also proposes an electrical module, which includes an electrical component 400, a wiring harness 100, and a connecting structure. The specific structure of the connecting structure is as described in the above embodiments. Since this electrical module adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The electrical component 400 is provided with an electrical housing 410, one side of the connecting structure is connected to the electrical housing 410, and the other side is connected to the wiring harness 100.

[0071] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A connection structure for connecting an electrical housing on one side and a wiring harness on the other side, characterized in that, include: A terminal block, one side of which is used for electrical connection to the shielding layer of the wire harness, and the other side is used for electrical connection to the electrical housing to ground the shielding layer; and A resonant adjustment structure is provided, which is connected in series with the shielding layer, the wiring terminal and the electrical housing to reduce the resonant amplitude of the shielding layer.

2. The connection structure as described in claim 1, characterized in that, The resonant adjustment structure includes an impedance-controllable conductive material, and the terminal includes a claw for electrical connection with the shielding layer. At least one of the shielding layer and the claw is provided with the impedance-controllable conductive material.

3. The connection structure as described in claim 1, characterized in that, The resonant adjustment structure includes an impedance-controllable conductive material, and at least one of the connection between the electrical housing and the terminal block and the connection between the terminal block and the electrical housing is provided with the impedance-controllable conductive material.

4. The connection structure as described in claim 2 or 3, characterized in that, The impedance-controllable conductive material is configured as any one of conductive adhesive, conductive pad, conductive rubber, and conductive cloth; and / or The conductivity doping rate or volume of the impedance-controllable conductive material is adjustable.

5. The connection structure as described in claim 1, characterized in that, The resonant adjustment structure includes a filter, on which an inductor and a capacitor are provided. The terminal block includes a claw for electrical connection to the shielding layer, and the claw is electrically connected to the filter.

6. The connection structure as described in claim 1, characterized in that, The resonant adjustment structure includes a filter, on which an inductor and a capacitor are provided. The filter is electrically connected to the terminal block and the electrical housing.

7. The connection structure as described in claim 5 or 6, characterized in that, The filter includes multiple sets of inductor components and multiple sets of capacitor components.

8. The connection structure as described in claim 2 or 5, characterized in that, The terminal block also includes a metal fastener, which is electrically connected to the claw and used to lock onto the electrical housing so that the terminal block is electrically connected to the electrical housing.

9. The connection structure as described in claim 1, characterized in that, The resonant adjustment structure is provided in a set, and the resonant adjustment structure is connected in series between the shielding layer and the terminal block, or the resonant adjustment structure is connected in series between the terminal block and the electrical housing; Alternatively, the resonant adjustment structure may be provided in two sets: one resonant adjustment structure is connected in series between the shielding layer and the terminal block, and the other resonant adjustment structure is connected in series between the terminal block and the electrical housing.

10. The connection structure as described in claim 9, characterized in that, When the resonant adjustment structure is provided in two sets, both resonant adjustment structures are configured with impedance-controllable conductive materials; or, both resonant adjustment structures are configured as filters; or, one resonant adjustment structure is configured with impedance-controllable conductive materials, and the other resonant adjustment structure is configured as a filter.

11. An electrical module, characterized in that, include: Electrical components, equipped with electrical housings; wire harness; as well as The connection structure as described in any one of claims 1 to 10, wherein one side of the connection structure is connected to the electrical housing and the other side is connected to the wiring harness.

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