Filter for new energy power assembly

Abstract

The utility model discloses a filter for a new energy power assembly, which comprises a plastic shell, a first bus copper bar and a second bus copper bar, and the first bus copper bar and the second bus copper bar penetrate through a first magnetic ring inductor and a second magnetic ring inductor and are arranged in the plastic shell in parallel; the first magnetic ring inductor and the second magnetic ring inductor are respectively arranged in the plastic shell; the PCB is provided with a plurality of capacitors, and the plurality of capacitors are electrically connected with the first bus copper bar and / or the second bus copper bar respectively; the spacer is arranged between the first bus copper bar and the second bus copper bar; and the plurality of cooling fins are arranged on the plastic shell and abut against the first bus copper bar and / or the second bus copper bar. The filter adopts the design of the partition plates and the radiating fins, so that the filter is compact in structure as much as possible, the size is reduced, and the safety and temperature standards are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technical field, especially a new energy power assembly filter. BACKGROUND

[0002] With the development of electronic industry, the popularity of new energy vehicles and consumer electronic products, power grid noise interference is increasingly serious, has become the public nuisance in the field of electronic machines, especially the inspection noise source, produces serious interference to microcomputer and digital circuit.

[0003] New energy electric vehicle involves the problem of electromagnetic compatibility related to the electromagnetic interference suppression by using filter, such as the authorized announcement No. CN 218243486 U of Chinese patent, a new energy electric vehicle motor controller filter, a positive copper bar and a negative copper bar pass through the first magnetic ring and the second magnetic ring, the line board assembly sets up multiple adjustable capacity capacitors, multiple capacitors connect positive copper bar, negative copper bar, first magnetic ring and second magnetic ring and form a filter loop, effectively suppresses and reduces the EMI interference of automobile motor controller under different working conditions, reduces the influence on radio communication signal and the structure is compact, the space utilization is high, the filter effect is good, the electrical connection is stable, and the versatility is strong.

[0004] Nowadays new energy electric vehicles have higher requirements on product size, high and low temperature and shock resistance, etc., such as electrical component design needs to meet the safety standard, such as the positive copper bar and the negative copper bar need to meet the requirements of safety standard (IEC60079-11), such as the electrical clearance and creepage distance of electrical components under 550V voltage is at least 7mm, and the positive copper bar and the negative copper bar are arranged too close, so that the temperature accumulation cannot be quickly dissipated, and the temperature of the copper bar is higher than the maximum working temperature of the filter design. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a new energy power assembly filter, the filter adopts the design of the partition plate and the cooling fin, makes the filter as compact as possible, reduces the size, meets the safety and temperature standards, further improves the space utilization, and reduces the size of the filter.

[0006] The above technical purpose of the utility model is realized by the following technical scheme: a new energy power assembly filter, comprising, plastic shell, first busbar and second busbar, the first busbar and the second busbar pass through the first magnetic ring inductance and the second magnetic ring inductance and are arranged in the plastic shell in parallel with each other;

[0007] The first magnetic ring inductance and the second magnetic ring inductance are arranged in the plastic shell respectively;

[0008] A PCB board, wherein multiple capacitors are disposed on the PCB, and the multiple capacitors are electrically connected to a first busbar and / or a second busbar respectively;

[0009] A spacer is disposed between the first busbar copper bus and the second busbar copper bus;

[0010] Heat sinks, a plurality of such heat sinks are disposed on a plastic housing and abut against the first busbar copper bus and / or the second busbar copper bus.

[0011] A further feature of this invention is that the partition base portion and the vertical portion abut against the bottom surface of the first busbar copper bus and the second busbar copper bus.

[0012] A further feature of this invention is that the vertical portion abuts against the sides of the first busbar copper bus and the second busbar copper bus.

[0013] A further feature of this invention is that the width of the base portion is D1, where D1 ≥ 8 mm, and the height of the vertical portion relative to the first busbar and / or the second busbar is D2, where D2 ≥ 3.5 mm.

[0014] A further feature of this invention is that the plastic shell has a spacer portion, the spacer portion is connected to the partition plate, and the height of the spacer portion relative to the first busbar copper bus and / or the second busbar copper bus is 3.5 mm.

[0015] A further feature of this invention is that the plastic shell is provided with a plurality of mounting grooves, and heat sinks are provided on each of the plurality of mounting grooves.

[0016] A further feature of this invention is that a safety groove is provided on the PCB board, and the width of the safety groove is D3, where D3 ≥ 2mm.

[0017] A further feature of this invention is that the magnetic ring of the first magnetic ring inductor is made of ferrite material, and the magnetic ring of the second magnetic ring inductor is made of nanocrystalline material.

[0018] The present invention is further configured such that: the filter circuit comprises a magnetic ring inductor L1, a magnetic ring inductor L2, capacitors Cx1, Cx2, Cx3, Cy1, Cy2, Cy3, Cy4, Cy5, and Cy6; capacitor Cx1 is connected in parallel with the input side of the magnetic ring inductor L1; capacitor Cx2 is connected in parallel with the output side of the magnetic ring inductor L1; and capacitor Cx3 is connected in parallel with the output side of the magnetic ring inductor L2.

[0019] A further feature of this invention is that the plastic shell is sealed with polyurethane or silicone potting compound.

[0020] Compared with the prior art, the filter size of this utility model is further reduced, and the design of the separator and heat sink meets the design requirements of safety regulations and temperature. The filter for new energy powertrain of this utility model has a compact structure, high space utilization, good filtering effect, stable electrical connection and strong versatility. Attached Figure Description

[0021] Figure 1 This is a 3D view of the filter in the embodiment.

[0022] Figure 2 This is a rear view of the filter in the embodiment.

[0023] Figure 3 This is a diagram of the internal structure of the filter in the embodiment.

[0024] Figure 4 This is a structural diagram of the busbar and spacers of the filter in the embodiment.

[0025] Figure 5 This is another structural view of the filter's busbar and spacers in the embodiment.

[0026] Figure 6 This is a structural diagram of the plastic housing of the filter in the embodiment.

[0027] Figure 7 This is a schematic diagram of the filter circuit forming a filter loop in the embodiment.

[0028] In the diagram: 100, plastic housing; 101, first busbar copper busbar; 102, second busbar copper busbar; 103, first magnetic ring inductor; 104, second magnetic ring inductor; 105, PCB board; 106, capacitor; 107, spacer; 108, heat sink; 109, mounting slot; 110, spacer section; 111, base section; 112, vertical section; 113, safety groove. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that the terms "upper," "lower," "inner," "outer," and "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] This embodiment discloses a filter for new energy powertrains. This filter is mainly used as a power supply filter in new energy powertrains to suppress low- and medium-frequency electromagnetic interference in high-current, high-pulse applications; such as Figures 1-6 As shown, a filter for a new energy powertrain includes: a plastic housing 100, a first busbar copper bus 101 and a second busbar copper bus 102. The first busbar copper bus 101 and the second busbar copper bus 102 pass through a first magnetic ring inductor 103 and a second magnetic ring inductor 104 and are arranged parallel to each other within the plastic housing 100. A gap is provided between the first busbar copper bus 101 and the second busbar copper bus 102. In use, the filter connects the positive and negative terminals. The first busbar copper bus 101 and the second busbar copper bus 102 serve as the positive and negative busbar copper busbars, respectively. The first magnetic ring inductor 103 and the second magnetic ring inductor 104 are respectively disposed within the plastic housing 100. Inside the plastic housing 100; a PCB board 105, on which multiple capacitors 106 are disposed, the multiple capacitors 106 being electrically connected to the first busbar copper bus 101 and / or the second busbar copper bus 102 respectively, the multiple capacitors 106 and the first busbar copper bus 101, the second busbar copper bus 102, the first magnetic ring inductor 103, and the second magnetic ring inductor 104 forming a filter circuit; a spacer 107, the spacer 107 being disposed between the first busbar copper bus 101 and the second busbar copper bus 102; a heat sink 108, the heat sink 108 being disposed on the plastic housing 100 and abutting against the first busbar copper bus 101 and the second busbar copper bus 102.

[0032] In this embodiment, the filter design is suitable for voltages of 550V and below. To meet the requirements of safety standards (IEC60079-11), a spacer 107 is provided between the first busbar copper bus 101 and the second busbar copper bus 102. The spacer 107 is made of insulating material, and the preferred spacer 107 is made of modified PPS plastic injection molding. In this example, the plastic housing 100 is also made of modified PPS plastic injection molding.

[0033] like Figures 3-5As shown, the partition 107 includes a base portion 111 and a vertical portion 112. The partition 107 is disposed between the first busbar copper bus 101 and the second busbar copper bus 102 to isolate the first busbar copper bus 101 and the second busbar copper bus 102. In some embodiments, the base portion 111 of the partition 107 abuts against the bottom surface of the first busbar copper bus 101 and the second busbar copper bus 102, and the vertical portion 112 of the partition 107 abuts against the side surface of the first busbar copper bus 101 and the second busbar copper bus 102. In other embodiments, the partition 107 is disposed with a gap between it and the first busbar copper bus 101 and the second busbar copper bus 102, and there is an air gap between them. In this example, the partition 107 is disposed with abutting against the first busbar copper bus 101 and the second busbar copper bus 102.

[0034] like Figure 4 , Figure 5 As shown, the width of the base portion 111 of the partition 107 is D1, D1≥8mm; the height of the vertical portion 112 of the partition 107 relative to the first busbar copper bus 101 and / or the second busbar copper bus 102 is D2, D2≥3.5mm.

[0035] like Figure 2 , Figure 6 As shown, in this example, there is a spacer 110 on the plastic housing 100. The spacer 110 separates the input and output ends of the first busbar copper bus 101 and the second busbar copper bus 102. The spacer 110 is connected to the partition 107 as an auxiliary isolation measure. Similarly, the height of the spacer 110 relative to the copper busbar is ≥3.5mm.

[0036] like Figure 3 As shown, a plurality of capacitors 106 are provided on the PCB board 105. The capacitors 106 include X capacitors and Y capacitors. The pins of the capacitors 106 are soldered to the PCB board 105. In this embodiment, the size of the filter is further reduced by reducing the size of the PCB board 105. The pins of the two electrodes are less than 7mm, which is less than the electrical clearance and creepage distance. A safety groove 113 is provided on the PCB board 105. The width of the safety groove 113 is D3, and D3≥2mm.

[0037] like Figure 6 As shown, the plastic housing 100 has several mounting slots 109. In this embodiment, there are two mounting slots 109, but more can be provided depending on the actual situation. Heat sinks 108 are mounted on the mounting slots 109, with at least two heat sinks 108. The first busbar copper bus 101 and the second busbar copper bus 102 have extended protrusions. The heat sinks 108 abut against these protrusions for heat conduction and dissipation. Preferably, the heat sinks 108 are made of a heat-dissipating material. The copper busbar temperature decreases significantly along the direction of the heat sinks 108, and the maximum temperature of the copper busbar meets the requirements. The heat sinks 108 can reduce the heat accumulated on the first busbar copper bus 101 and the second busbar copper bus 102.

[0038] In this embodiment, the filter employs a two-stage filtering method using a first magnetic ring inductor 103 and a second magnetic ring inductor 104 to suppress electromagnetic interference. Preferably, the magnetic ring of the first magnetic ring inductor 103 is made of ferrite material, and the magnetic ring of the second magnetic ring inductor 104 is made of nanocrystalline material, thus expanding the EMI suppression bandwidth. Experiments show that ferrite inductors have good high-frequency impedance characteristics, especially the 3K manganese-zinc ferrite inductor, which has high permeability, impedance, and a wide spectrum. Experiments also show that with nanocrystalline alloy strips, the thinner the strip, the higher the high-frequency permeability and the higher the impedance, resulting in better EMC performance for the device.

[0039] In this embodiment, a filter for a new energy powertrain is sealed with polyurethane or silicone potting compound.

[0040] like Figure 7 The diagram shows the circuit diagram of the filter circuit for the new energy powertrain filter constructed by this utility model. The filter circuit includes a magnetic ring inductor L1 and a magnetic ring inductor L2. The input side of the magnetic ring inductor L1 is electrically connected to the positive input terminal HV+ and the negative input terminal HV- respectively. The output side of the magnetic ring inductor L2 is electrically connected to the positive output terminal OUT+ and the negative output terminal OUT- respectively. The output side of the magnetic ring inductor L1 and the input side of the magnetic ring inductor L2 are electrically connected.

[0041] In this embodiment, an X capacitor and a Y capacitor are connected in parallel on the input side of the magnetic ring inductor L1. A capacitor Cx1 is connected in parallel with the input side of the magnetic ring inductor L1. One end of capacitor Cy1 is electrically connected to the positive terminal HV+ of the input terminal, and the other end of capacitor Cy1 is electrically connected to the ground point. One end of capacitor Cy2 is electrically connected to the negative terminal HV- of the input terminal, and the other end of capacitor Cy2 is electrically connected to the ground point. At the same time, capacitors Cy1 and Cy2 are electrically connected. The capacitance of Cx1 is 470nF, and the capacitances of Cy1 and Cy2 are 4.7nF.

[0042] In this embodiment, capacitors X and Y are connected in parallel on the output side of the magnetic ring inductor L1. Capacitor Cx2 is connected in parallel with the output side of the magnetic ring inductor L1. One end of capacitor Cy3 is electrically connected to the positive terminal of the output side of the magnetic ring inductor L1, and the other end of capacitor Cy3 is electrically connected to the ground point. One end of capacitor Cy4 is electrically connected to the negative terminal of the output side of the first magnetic ring inductor L1, and the other end of capacitor Cy4 is electrically connected to the ground point. At the same time, capacitors Cy3 and Cy4 are electrically connected. Among them, the capacitance of Cx2 is 330nF, and the capacitances of Cy3 and Cy4 are 100nF.

[0043] In this embodiment, capacitors X and Y are connected in parallel on the output side of the magnetic ring inductor L2. Capacitor Cx3 is connected in parallel with the output side of the magnetic ring inductor L2. One end of capacitor Cy5 is electrically connected to the positive terminal of the output side of the magnetic ring inductor L2, and the other end of capacitor Cy5 is electrically connected to the ground point. One end of capacitor Cy6 is electrically connected to the negative terminal of the output side of the magnetic ring inductor L2, and the other end of capacitor Cy6 is electrically connected to the ground point. At the same time, capacitors Cy5 and Cy6 are electrically connected. Among them, the capacitance of Cx3 is 100nF, and the capacitances of Cy5 and Cy6 are 330nF.

[0044] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A filter for a new energy powertrain, characterized in that: It includes a plastic housing (100), a first busbar copper bus (101) and a second busbar copper bus (102), wherein the first busbar copper bus (101) and the second busbar copper bus (102) pass through the first magnetic ring inductor (103) and the second magnetic ring inductor (104) and are arranged parallel to each other within the plastic housing (100); The first magnetic ring inductor (103) and the second magnetic ring inductor (104) are respectively disposed inside the plastic housing (100); A PCB board (105) is provided with a plurality of capacitors (106), and the plurality of capacitors (106) are electrically connected to a first busbar copper bus (101) and / or a second busbar copper bus (102) respectively. A partition (107) is disposed between the first busbar copper bus (101) and the second busbar copper bus (102); Heat sinks (108), a plurality of said heat sinks (108) are disposed on the plastic housing (100) and abut against the first busbar copper bus (101) and / or the second busbar copper bus (102).

2. The filter for a new energy powertrain according to claim 1, characterized in that: The partition (107) has a base portion (111) and a vertical portion (112), with the base portion (111) abutting against the bottom surfaces of the first busbar copper bus (101) and the second busbar copper bus (102).

3. A filter for a new energy powertrain according to claim 2, characterized in that: The vertical part (112) abuts against the sides of the first busbar copper bus (101) and the second busbar copper bus (102).

4. A filter for a new energy powertrain according to claim 3, characterized in that: The width of the base part (111) is D1, D1≥8mm, and the height of the vertical part (112) relative to the first busbar copper bus (101) and / or the second busbar copper bus (102) is D2, D2≥3.5mm.

5. A filter for a new energy powertrain according to claim 1, characterized in that: The plastic housing (100) has a spacer (110) connected to the partition (107), and the spacer (110) is 3.5 mm high relative to the first busbar copper bus (101) and / or the second busbar copper bus (102).

6. A filter for a new energy powertrain according to claim 1, characterized in that: The plastic housing (100) is provided with a plurality of mounting slots (109), and heat sinks (108) are respectively provided on the plurality of mounting slots (109).

7. A filter for a new energy powertrain according to claim 1, characterized in that: The PCB board (105) has a safety groove (113) with a width of D3, where D3 ≥ 2 mm.

8. A filter for a new energy powertrain according to claim 1, characterized in that: The magnetic ring of the first magnetic ring inductor (103) is made of ferrite material, and the magnetic ring of the second magnetic ring inductor (104) is made of nanocrystalline material.

9. A filter for a new energy powertrain according to claim 1, characterized in that: The filter circuit consists of magnetic ring inductors L1 and L2, capacitors Cx1, Cx2, Cx3, Cy1, Cy2, Cy3, Cy4, Cy5, and Cy6. Capacitor Cx1 is connected in parallel with the input side of magnetic ring inductor L1, capacitor Cx2 is connected in parallel with the output side of magnetic ring inductor L1, and capacitor Cx3 is connected in parallel with the output side of magnetic ring inductor L2.

10. A filter for a new energy powertrain according to claim 1, characterized in that: The plastic housing (100) is sealed with polyurethane or silicone potting compound.

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