CN113811168B - Electromagnetic interference filtering device and electric automobile - Google Patents
Electromagnetic interference filtering device and electric automobile Download PDFInfo
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- CN113811168B CN113811168B CN202010530049.3A CN202010530049A CN113811168B CN 113811168 B CN113811168 B CN 113811168B CN 202010530049 A CN202010530049 A CN 202010530049A CN 113811168 B CN113811168 B CN 113811168B
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- 238000001914 filtration Methods 0.000 title claims abstract description 49
- 239000003990 capacitor Substances 0.000 claims abstract description 50
- 229910052751 metal Inorganic materials 0.000 claims abstract description 40
- 239000002184 metal Substances 0.000 claims abstract description 40
- 230000001629 suppression Effects 0.000 claims abstract description 22
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 claims description 4
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005670 electromagnetic radiation Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides an electromagnetic interference filtering device and an electric automobile, and relates to the technical field of vehicle control, wherein the electromagnetic interference filtering device comprises: the metal shell is provided with openings for passing high-voltage wire bundles of electromagnetic interference to be filtered on two opposite end surfaces of the metal shell respectively; at least one magnetic ring, at least one magnetic ring is arranged in the metal shell, and at least one magnetic ring is sleeved on the high-voltage wire harness to be subjected to electromagnetic interference filtering; and one end of each capacitor is connected with the high-voltage wire harness to be filtered out of electromagnetic interference, and the other end of each capacitor is connected with the metal shell. The scheme of the invention realizes the suppression of electromagnetic interference on the power battery when the whole high-voltage system of the electric automobile works, and ensures the service life of the power battery.
Description
Technical Field
The invention relates to the technical field of whole vehicle control, in particular to an electromagnetic interference filtering device and an electric vehicle.
Background
In an electric automobile, a power source controlled by a motor is a power battery, namely, a high-voltage direct-current end of the motor controller is connected with a high-voltage port of the power battery in parallel, and due to transient operating characteristics of a power electronic switching device in the motor controller, the motor controller can cause larger conduction electromagnetic interference when in operation. The effect of this electromagnetic interference is mainly expressed in two ways: the conduction interference is transmitted to the high-voltage direct current bus of the power battery along the high-voltage direct current line, and impact is generated on the service life of the power battery; the conductive disturbance affects the low voltage wiring harness of the power battery and motor controller along the vehicle body, thereby affecting control and signal transmission; therefore, how to control the electromagnetic conduction emission of the motor controller is important.
Disclosure of Invention
The invention aims to provide an electromagnetic interference filtering device and an electric automobile, so that the problem that the electromagnetic interference in the prior art affects the stability and reliability of the whole automobile.
In order to achieve the above object, the present invention provides an electromagnetic interference filtering device, comprising:
the metal shell is provided with openings for passing high-voltage wire bundles of electromagnetic interference to be filtered on two opposite end surfaces of the metal shell respectively;
at least one magnetic ring, at least one magnetic ring is arranged in the metal shell, and at least one magnetic ring is sleeved on the high-voltage wire harness to be subjected to electromagnetic interference filtering;
and one end of each capacitor is connected with the high-voltage wire harness to be filtered out of electromagnetic interference, and the other end of each capacitor is connected with the metal shell.
Optionally, the high-voltage wire harness to be filtered of electromagnetic interference comprises an anode high-voltage wire harness and a cathode high-voltage wire harness;
one end of a first capacitor of the at least two capacitors is connected with the positive high-voltage wire harness, and one end of a second capacitor of the at least two capacitors is connected with the negative high-voltage wire harness;
the other end of the first capacitor and the other end of the first capacitor are respectively connected with the metal shell.
Optionally, the magnetic ring includes: ferrite magnetic rings, manganese zinc magnetic rings or nanocrystalline magnetic rings.
Optionally, the electromagnetic interference filtering device further includes:
the magnetic clamps are respectively arranged on the low-voltage wire harness to be filtered of electromagnetic interference.
Optionally, the magnetic clip includes: nickel zinc ferrite magnetic clip.
The embodiment of the invention also provides an electric automobile, which comprises: the motor controller and the power battery also comprise the electromagnetic interference filtering device;
wherein, a positive high-voltage wire harness and a negative high-voltage wire harness are connected between the motor controller and the power battery;
the electromagnetic interference filtering device is arranged in a battery box body of the power battery;
the positive high-voltage wire harness and the negative high-voltage wire harness respectively pass through the electromagnetic interference filtering device;
the metal shell of the electromagnetic interference filtering device is connected with the battery box body through a grounding wire.
Optionally, the electromagnetic interference filtering device further includes: a plurality of magnetic clips;
the magnetic clamps are arranged on the low-voltage wire harness or the signal wire; the low-voltage wire harness is connected with the motor controller or a battery management system of the power battery; the signal line is connected between the battery module and the battery management system.
Optionally, a first magnetic clamp is arranged on a low-voltage wire harness connected with the motor controller;
the signal wire is provided with a second magnetic clamp;
the low-voltage wire harness is arranged in the battery box body and connected with the battery management system, and a third magnetic clamp is arranged on the low-voltage wire harness.
Optionally, a first electromagnetic interference suppression unit is arranged in the motor controller;
the first electromagnetic interference suppression unit is connected with the positive high-voltage wire harness and the negative high-voltage wire harness respectively.
Optionally, a second electromagnetic interference suppression unit is arranged in the motor controller;
the second electromagnetic interference suppression unit is connected with a high-voltage alternating current wire harness between the motor controller and the motor.
The technical scheme of the invention has at least the following beneficial effects:
according to the electromagnetic interference filtering device, the metal shell is arranged, the opening is formed in the metal shell, so that the high-voltage wire harness to be filtered electromagnetic interference passes through the metal shell, and the electromagnetic interference is prevented from being transmitted through the high-voltage wire harness through at least one magnetic ring and at least two capacitors arranged in the metal shell, so that the electromagnetic interference is suppressed, and the reliability and stability of the whole vehicle are improved.
Drawings
FIG. 1 is a schematic diagram of an EMI filter device connected with other components according to an embodiment of the present invention;
fig. 2 is a second schematic diagram of the connection between the emi filter apparatus and other components according to the embodiment of the present invention.
Reference numerals illustrate:
1-metal shell, 2-magnetic ring, Y1-first electric capacity, Y2-second electric capacity, 201-motor controller, 201A-front motor controller, 201B-rear motor controller, 202A-front motor, 202B-rear motor, 203-battery box, 204-electromagnetic interference filtering device, 205-positive high-voltage wire harness, 206-negative high-voltage wire harness, 207-first electromagnetic interference suppression unit, 208-second electromagnetic interference suppression unit, 209-battery management system, 210-battery module, 211-first magnetic clamp, 212-second magnetic clamp and 213-third magnetic clamp.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
Aiming at the problem that the electromagnetic interference in the prior art affects the reliability and stability of the whole vehicle operation, the invention provides the electromagnetic interference filtering device and the electric vehicle, which realize the suppression of electromagnetic interference generated by an electromagnetic interference source, reduce the influence of the electromagnetic interference on signal transmission along the transmission of a wire harness and improve the reliability and stability of the whole vehicle operation.
Fig. 1 is a schematic diagram of an emi filter apparatus connected to other components according to an embodiment of the present invention, where, as shown in fig. 1, the emi filter apparatus includes:
the metal shell 1, two opposite end surfaces of the metal shell 1 are respectively provided with openings for the high-voltage wire bundles to be filtered to pass through; the metal shell 1 realizes shielding of electromagnetic radiation, reduces electromagnetic radiation and greatly reduces the emission of electromagnetic radiation.
At least one magnetic ring 2, wherein the at least one magnetic ring 2 is arranged in the metal shell 1, and the at least one magnetic ring 2 is sleeved on a high-voltage wire harness to be subjected to electromagnetic interference filtering; the magnetic ring 2 is mainly used for filtering common mode interference.
And one end of the at least two capacitors is respectively connected with the high-voltage wire harness to be filtered out of electromagnetic interference, and the other end of the at least two capacitors is connected with the metal shell 1. Therefore, the two capacitors form a Y capacitor, and the high-voltage common-mode interference is filtered.
In the electromagnetic interference filtering device provided by the embodiment of the invention, the metal shell 1 plays a role in shielding electromagnetic interference, the magnetic ring 2 realizes the suppression of common mode interference, at least two capacitors realize the filtering of high-voltage common mode interference, the high-voltage wire harness to be filtered of electromagnetic interference passes through the metal shell 1, the magnetic ring 2 is sleeved on the high-voltage wire harness, one ends of the at least two capacitors are respectively connected with different high-voltage wire harnesses, and the other ends of the at least two capacitors are connected with the metal shell 1 to form a Y capacitor, so that the common mode interference of the high-voltage wire harness is filtered, the electromagnetic interference generated by an electromagnetic interference source is prevented from being transmitted through the transmission of the high-voltage wire harness, the suppression of the electromagnetic interference is realized, and the reliability and stability of the whole vehicle work are improved.
Specifically, the high-voltage wire harness to be filtered of electromagnetic interference includes a positive high-voltage wire harness 205 and a negative high-voltage wire harness 206;
one end of a first capacitor Y1 of the at least two capacitors is connected with the positive high-voltage wire harness 205, and one end of a second capacitor Y2 of the at least two capacitors is connected with the negative high-voltage wire harness 206;
the other end of the first capacitor Y1 and the other end of the first capacitor Y2 are connected to the metal case 1, respectively.
In this way, the first capacitor Y1 and the second capacitor Y2 form a Y capacitor for suppressing electromagnetic interference, and in particular, the Y capacitor is mainly used for filtering out high-voltage common-mode interference.
As a specific embodiment, as shown in fig. 1, a high-voltage wire harness is connected between a motor controller 201 and a battery module 210, two magnetic rings 2 and four capacitors are disposed in a metal housing 1 of an electromagnetic interference filtering device, and specifically, the arrangement modes of the magnetic rings 2 and the capacitors in the metal housing 1 are as follows: magnetic ring-Y capacitance (first capacitance Y1 and second capacitance Y2) -magnetic ring-Y capacitance (third capacitance Y3 and fourth capacitance Y4), namely: the magnetic rings 2 are spaced apart from the Y-capacitor, and one magnetic ring 2 is close to the electromagnetic interference source (motor controller in fig. 1). In this way, an effective filtering of common mode interference is achieved.
As an alternative embodiment, the magnetic ring 2 comprises: ferrite magnetic rings, manganese zinc magnetic rings or nanocrystalline magnetic rings.
It should be noted that, since the high-voltage wire harness has a larger wire diameter, the high-voltage wire harness cannot be wound on the magnetic ring 2, and only the high-voltage wire harness can pass through the magnetic ring 2, so that in order to improve the common mode interference suppression capability of the electromagnetic interference filtering device, the thickness of the magnetic ring 2 needs to be increased, and in this embodiment, magnetic rings with different materials and/or different thicknesses can be selected according to the user and the test result.
Further, as an alternative embodiment, as shown in fig. 2, the electromagnetic interference filtering apparatus further includes:
the magnetic clamps are respectively arranged on the low-voltage wire harness to be filtered of electromagnetic interference.
Because electromagnetic interference generated by an electromagnetic interference source can be transmitted through the wire harness, the wire harness comprises a high-voltage wire harness and a low-voltage wire harness, and therefore, in order to further improve the filtering effect of the electromagnetic interference filtering device on the electromagnetic interference, the electromagnetic interference filtering device further comprises a magnetic clamp arranged on the low-voltage wire harness, and the magnetic clamp is arranged on the low-voltage wire harness, so that the conduction interference of the low-voltage wire harness is reduced, and the signal quality of the low-voltage wire harness and the power quality of a low-voltage power supply are improved.
Specifically, the magnetic clamp includes: nickel zinc ferrite magnetic clip.
According to the electromagnetic interference filtering device provided by the embodiment of the invention, the metal shell 1 is arranged, the magnetic ring 2 and the Y capacitor are arranged in the metal shell 1, the high-voltage wire harness passes through the metal shell 1 and the magnetic ring 2, one end of the Y capacitor is connected with the high-voltage wire harness, and the other end of the Y capacitor is connected with the metal shell 1, so that the conduction of the high-voltage wire harness on electromagnetic interference is reduced; through set up the magnetism and press from both sides on low pressure pencil, reduced the conduction of low pressure pencil to electromagnetic interference, promoted whole car operational reliability and stability.
The embodiment of the invention also provides an electric automobile, which comprises the motor controller 201, a power battery and the electromagnetic interference filtering device 204.
Wherein, a positive high-voltage wire harness 205 and a negative high-voltage wire harness 206 are connected between the motor controller 201 and the power battery; electromagnetic interference generated by the motor controller 201 can be conducted to the power battery through the positive high-voltage wire harness 205 and the negative high-voltage wire harness 206, thereby causing an impact on the life of the power battery, and therefore, it is necessary to reduce the electromagnetic interference conduction by the positive high-voltage wire harness 205 and the negative high-voltage wire harness 206.
The electromagnetic interference filtering device 204 is arranged in the battery box 203 of the power battery;
the positive high-voltage wire harness 205 and the negative high-voltage wire harness 206 respectively pass through the electromagnetic interference filtering device 204;
the metal casing 1 of the emi filter 204 is connected to the battery box 203 through a ground wire. In this way, the metal case 1 and the battery case 203 are connected with equipotential.
As shown in fig. 2, a motor and a motor controller are respectively arranged on the front and rear drive axles of the electric automobile, so that four-wheel drive is realized, and better motion performance is obtained, and the motor controller 201 is an important electromagnetic interference source in the electric automobile, so that the electromagnetic interference problem caused by the four-wheel drive electric automobile is far greater than that caused by a single motor system. As shown in fig. 2, the motor controller 201 of the four-wheel drive electric vehicle includes a front motor controller 201A and a rear motor controller 201B, and the power sources of the two-motor control are power batteries, that is, the high-voltage direct-current ends of the front motor controller 201A and the rear motor controller 201B are connected in parallel to the high-voltage port of the power battery, so that when electromagnetic interference filtering is performed, an electromagnetic interference filtering device 204 needs to be disposed between the front motor controller 201A and the battery module 210, and an electromagnetic interference filtering device 204 is disposed between the rear motor controller 201B and the battery module 210, so as to realize suppression of electromagnetic interference generated by the front motor controller 201A and the rear motor controller 201B.
Further, as an optional embodiment, the electromagnetic interference filtering device 204 further includes: a plurality of magnetic clips;
the magnetic clamps are arranged on the low-voltage wire harness or the signal wire; wherein the low voltage harness is connected with a battery management system 209 of the motor controller or the power battery; the signal line is connected between the battery module 210 and the battery management system 209.
Specifically, a first magnetic clamp 211 is arranged on a low-voltage wire harness connected with the motor controller; the low voltage harness is connected to the control circuit of the motor controller, and as shown in fig. 2, the first magnetic clip 211 is disposed outside the housing of the front motor controller 201A and outside the housing of the rear motor controller 201B. Thus, the influence of electromagnetic interference generated in the motor controller shell on the signal quality on the low-voltage wire harness and the power quality of the low-voltage power supply is reduced, and the deviation caused by the working performance of the driving motor system is laughed.
A second magnetic clamp 212 is arranged on the signal line connected between the battery module 210 and the battery management system 209; specifically, the battery management system 209 collects characteristics of voltage, current, temperature, etc. of the battery module 210 through the information signal line, and in order to reduce conduction interference along the signal line, the embodiment of the present invention is provided with the second magnetic clamp 212 on the signal line.
A third magnetic clamp 213 is disposed on the low voltage harness that is disposed in the battery box 203 and connected to the battery management system 209. The battery management system 209 uses the low voltage wire harness and other low voltage wires of the electric vehicle to connect with a low voltage power supply for signal command transmission, and in order to reduce the conduction interference of the voltage wire harness, the embodiment of the invention sets the third magnetic clamp 213 on the low voltage wire harness.
Alternatively, the first magnetic clip 211, the second magnetic clip 212, and the third magnetic clip 213 may be selected from nickel zinc ferrite magnetic clips.
As an alternative embodiment, the motor controller is provided with a first electromagnetic interference suppression unit 207; wherein the first electromagnetic interference suppression unit 207 is connected to the positive high-voltage harness 205 and the negative high-voltage harness 206, respectively.
Specifically, as shown in fig. 2, the first electromagnetic interference suppression unit 207 is provided in each of the front motor controller 201A and the rear motor controller 201B, thereby reducing the conduction interference along the high-voltage wire harness.
As an alternative embodiment, a second electromagnetic interference suppression unit 208 is disposed in the motor controller; the second electromagnetic interference suppression unit 208 is connected to a high voltage ac wiring harness between the motor controller and the motor.
Specifically, as shown in fig. 2, the second electromagnetic interference suppression unit 208 is disposed in each of the front motor controller 201A and the rear motor controller 201B, thereby reducing electromagnetic interference caused by the front motor 202A and the rear motor 202B.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (10)
1. An electromagnetic interference filtering apparatus, comprising:
the electromagnetic interference filter comprises a metal shell (1), wherein openings for passing high-voltage wire bundles of electromagnetic interference to be filtered are respectively formed in two opposite end surfaces of the metal shell (1);
at least one magnetic ring (2), wherein at least one magnetic ring (2) is arranged in the metal shell (1), and at least one magnetic ring (2) is sleeved on the high-voltage wire harness to be subjected to electromagnetic interference filtering;
at least two capacitors;
two magnetic rings (2) and four capacitors are arranged in a metal shell (1) of the electromagnetic interference filtering device, the two capacitors are a capacitor group, one end of each capacitor in each capacitor group is connected with a high-voltage wire harness to be filtered out of electromagnetic interference, the other end of each capacitor is connected with the metal shell (1), and the arrangement mode of the magnetic rings (2) and the capacitors in the metal shell (1) is as follows: the magnetic rings (2) are arranged with the capacitor groups at intervals, and one magnetic ring (2) is adjacent to an electromagnetic interference source.
2. The electromagnetic interference filtering device according to claim 1, wherein the high voltage wire harness to be filtered out of electromagnetic interference comprises a positive high voltage wire harness (205) and a negative high voltage wire harness (206);
one end of a first capacitor (Y1) in each capacitor group is connected with the positive high-voltage wire harness (205), and one end of a second capacitor (Y2) in each capacitor group is connected with the negative high-voltage wire harness (206);
the other end of the first capacitor (Y1) and the other end of the second capacitor (Y2) are respectively connected with the metal shell (1).
3. The electromagnetic interference filtering device according to claim 1, characterized in that the magnetic ring (2) is a ferrite magnetic ring, a manganese zinc magnetic ring or a nanocrystalline magnetic ring.
4. The electromagnetic interference filtering device according to claim 1, further comprising:
the magnetic clamps are respectively arranged on the low-voltage wire harness to be filtered of electromagnetic interference.
5. The emi filter apparatus of claim 4 wherein the magnetic clip is a nickel zinc ferrite magnetic clip.
6. An electric automobile, comprising: a motor controller (201) and a power battery, further comprising an electromagnetic interference filtering device (204) according to any one of claims 1 to 5;
wherein, a positive high-voltage wire harness (205) and a negative high-voltage wire harness (206) are connected between the motor controller (201) and the power battery;
the electromagnetic interference filtering device (204) is arranged in a battery box body (203) of the power battery;
the positive high-voltage wire harness (205) and the negative high-voltage wire harness (206) respectively pass through the electromagnetic interference filtering device (204);
the metal shell (1) of the electromagnetic interference filtering device (204) is connected with the battery box body (203) through a grounding wire.
7. The electric vehicle of claim 6, characterized in that the electromagnetic interference filtering device further comprises: a plurality of magnetic clips;
the magnetic clamps are arranged on the low-voltage wire harness or the signal wire; wherein the low voltage harness is connected with the motor controller or a battery management system (209) of the power battery; the signal line is connected between a battery module (210) and the battery management system (209).
8. The electric vehicle of claim 7, characterized in that a first magnetic clamp (211) is provided on a low voltage harness connected to the motor controller;
a second magnetic clamp (212) is arranged on the signal wire;
and a third magnetic clamp (213) is arranged in the battery box body (203) and is arranged on a low-voltage wire harness connected with the battery management system (209).
9. The electric vehicle according to claim 6, characterized in that the motor controller is provided with a first electromagnetic interference suppression unit (207) therein;
wherein the first electromagnetic interference suppression unit (207) is connected to the positive high-voltage harness (205) and the negative high-voltage harness (206) respectively.
10. The electric vehicle according to claim 6 or 9, characterized in that a second electromagnetic interference suppression unit (208) is provided in the motor controller;
the second electromagnetic interference suppression unit (208) is connected with a high-voltage alternating current wire harness between the motor controller and the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010530049.3A CN113811168B (en) | 2020-06-11 | 2020-06-11 | Electromagnetic interference filtering device and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010530049.3A CN113811168B (en) | 2020-06-11 | 2020-06-11 | Electromagnetic interference filtering device and electric automobile |
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| CN113811168A CN113811168A (en) | 2021-12-17 |
| CN113811168B true CN113811168B (en) | 2024-02-09 |
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| CN210628009U (en) * | 2019-09-03 | 2020-05-26 | 广州易力日拓电子科技有限公司 | Novel filter inductance box |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203553847U (en) * | 2013-11-29 | 2014-04-16 | 南方电网科学研究院有限责任公司 | Power transmission line radio interference suppression filter |
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| CN207157136U (en) * | 2017-08-30 | 2018-03-30 | 北京新能源汽车股份有限公司 | A kind of vehicle-mounted low pressure components system and electric automobile |
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| CN210628009U (en) * | 2019-09-03 | 2020-05-26 | 广州易力日拓电子科技有限公司 | Novel filter inductance box |
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| Publication number | Publication date |
|---|---|
| CN113811168A (en) | 2021-12-17 |
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