CN114103664B - Charging module and electric automobile - Google Patents
Charging module and electric automobile Download PDFInfo
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- CN114103664B CN114103664B CN202010894645.XA CN202010894645A CN114103664B CN 114103664 B CN114103664 B CN 114103664B CN 202010894645 A CN202010894645 A CN 202010894645A CN 114103664 B CN114103664 B CN 114103664B
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- 239000003990 capacitor Substances 0.000 claims description 72
- 239000002184 metal Substances 0.000 claims description 41
- 230000001629 suppression Effects 0.000 claims description 38
- 239000003112 inhibitor Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
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- 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
- B60L50/66—Arrangements of batteries
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- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a charging module and an electric automobile, and relates to the technical field of automobiles. The module that charges includes battery module and battery management system, the module that charges still includes: the quick charging connector is connected with the battery module through a quick charging high-voltage line and connected with the battery management system through a low-voltage signal line; the first electromagnetic interference suppressor is connected to the fast charging high-voltage line; a second electromagnetic interference suppressor connected to the low voltage signal line; the power battery box body, the quick charge connector is arranged on the power battery box body, and the battery module, the battery management system, the first electromagnetic interference suppressor and the second electromagnetic interference suppressor are arranged in the power battery box body. The charging module and the electric automobile provided by the embodiment of the invention solve the problem of coupling failure of the high-voltage direct current to the charging module in the high-power charging process by adding the electromagnetic interference suppressor.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a charging module and an electric automobile.
Background
The charging voltage of the high-power charging technology of the electric automobile can reach 700V direct current, and the charging current can reach 500A, so that the high-power charging efficiency is very high. But the charging power is increased to cause electromagnetic interference. When the high-power charging mode is adopted, the charging wire is provided with a high-voltage direct-current wire and low-voltage signal wires such as CC1 and CC2, and the high-voltage wire and the low-voltage wire are bound together through insulating materials to form a complete wire harness. The high-voltage direct current line is connected with a high-voltage component of the quick charging equipment, and large interference exists on the high-voltage direct current line, and because the wire harnesses are bound together, the voltage amplitude value on the high-voltage wire harness is far higher than the low-voltage signal level value, and the interference on the high-voltage wire harness is easily coupled to the low-voltage wire harness. Meanwhile, the high-voltage direct current wire is connected with the module in the power battery box body, and the service life of the power battery can be influenced by voltage impact of the conduction interference on the module.
Thus, there are two major interference problems with high power charging, first: the high-voltage direct current interference is coupled to the low-voltage signal wire, so that serious deviation of the working state of a signal acquisition circuit or a processing circuit is easy to occur, and even the high-power charging function is invalid; second,: impact of high voltage direct current conduction interference on the service life of the power battery.
Disclosure of Invention
The embodiment of the invention provides a charging module and an electric automobile, which are used for solving the problem that the high-power charging function is invalid due to electromagnetic interference of the charging module in high-power charging.
In order to solve the technical problems, the invention adopts the following technical scheme:
the embodiment of the invention provides a charging module, which comprises a battery module and a battery management system, and further comprises:
The quick charging connector is connected with the battery module through a quick charging high-voltage line and connected with the battery management system through a low-voltage signal line;
the first electromagnetic interference suppressor is connected to the fast charging high-voltage line;
A second electromagnetic interference suppressor connected to the low voltage signal line;
The power battery box body, the quick charge connector is arranged on the power battery box body, and the battery module, the battery management system, the first electromagnetic interference suppressor and the second electromagnetic interference suppressor are arranged in the power battery box body.
Further, the first electromagnetic interference suppressor and the second electromagnetic interference suppressor each include:
the electromagnetic interference suppression circuit is connected with the fast-charging high-voltage line or the low-voltage signal line;
a metal shell surrounding the electromagnetic interference suppression circuit; the metal shell is connected with the power battery box body through a metal circuit, and the electromagnetic interference suppression circuit is connected with the metal shell through a metal circuit.
Further, the electromagnetic interference suppression circuit includes:
At least one magnetic ring; wherein the magnetic ring of the first electromagnetic interference suppressor is arranged around the fast-charging high-voltage line; the magnetic loop of the second electromagnetic interference suppressor surrounds the low voltage signal line;
At least one capacitor bank circuit; the capacitor bank circuit comprises at least two capacitors connected in series;
One end of the capacitor group circuit of the first electromagnetic interference suppressor is connected with a first circuit in the fast-charging high-voltage line, and the other end of the capacitor group circuit of the first electromagnetic interference suppressor is connected with a second circuit of the fast-charging high-voltage line;
One end of the capacitor group circuit of the second electromagnetic interference suppressor is connected with a third circuit in the low-voltage signal line, and the other end of the capacitor group circuit of the second electromagnetic interference suppressor is connected with a fourth circuit in the low-voltage signal line.
Further, the electromagnetic interference suppression circuit further includes:
A first connection line and a second connection line;
the first connecting line is connected with a first line in the fast-charging high-voltage line, and the second connecting line is connected with a second line of the fast-charging high-voltage line; or alternatively
The first connecting line is connected with a third line in the low-voltage signal line, and the second connecting line is connected with a fourth line in the low-voltage signal line;
the first circuit in the fast-charging high-voltage line is an anode circuit, and the second circuit in the fast-charging high-voltage line is a cathode circuit; and the third circuit and the fourth circuit in the low-voltage signal line are both signal circuits.
Further, the capacitors in the capacitor group circuit are all Y capacitors with the same specification and model.
Further, the electromagnetic interference suppression circuit in the first electromagnetic interference suppressor further includes:
and one end of the X capacitor is connected with the first circuit in the fast-charging high-voltage line, and the other end of the X capacitor is connected with the second circuit of the fast-charging high-voltage line.
Further, the charging module further includes:
And the high-voltage relay is arranged between the battery module and the first electromagnetic interference inhibitor.
Further, the charging module further includes:
and the ground wire is arranged on the low-voltage signal wire and is respectively connected with the power battery box body and the metal shell of the second electromagnetic interference suppressor.
Further, the charging module further includes:
the quick charging seat is connected with the quick charging connector through the quick charging high-voltage line, the low-voltage signal line and the ground line;
And the outer parts of the fast-charging high-voltage wire, the low-voltage signal wire and the ground wire are provided with insulating jackets.
The embodiment of the invention also provides an electric automobile, which comprises the charging module.
The beneficial effects of the invention are as follows:
According to the charging module provided by the embodiment of the invention, a zoned electromagnetic interference control idea is adopted, and two electromagnetic interference suppressors are added in the charging module, one of the electromagnetic interference suppressors is connected with the fast charging high-voltage line, the other electromagnetic interference suppressors are connected with the low-voltage signal line, the high-voltage and low-voltage electromagnetic interference suppressors are used for respectively suppressing electromagnetic interference, the interference intensity caused by high-voltage direct current is reduced, the signal quality of the low-voltage signal line is improved, and the difficulty of electromagnetic interference suppression is reduced. Meanwhile, the invention also improves the conduction anti-interference capability of the power battery and reduces the impact of high-voltage direct current conduction interference on the service life of the power battery.
Drawings
Fig. 1 is a schematic structural diagram of a charging module according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of an electromagnetic interference suppression circuit according to an embodiment of the present invention.
Reference numerals illustrate: 1-quick-fill connector; 2-a battery module; 3-a battery management system; 4-a first electromagnetic interference suppressor; 5-a second electromagnetic interference suppressor; 6-a power battery box body; 7-quick filling seat; 81-a first bond wire; 82-second bond wires.
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. In the following description, specific details such as specific configurations and components are provided merely to facilitate a thorough understanding of embodiments of the invention. It will therefore be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
The invention provides a charging module and an electric automobile, aiming at the problem that the high-power charging function is invalid due to electromagnetic interference of the charging module in high-power charging.
As shown in fig. 1, an alternative embodiment of the present invention provides a charging module, including a battery module 2 and a battery management system 3, where the charging module further includes:
the quick-charging connector 1 is connected with the battery module 2 through a quick-charging high-voltage line and connected with the battery management system 3 through a low-voltage signal line;
A first electromagnetic interference suppressor 4 connected to the fast-charging high-voltage line;
a second electromagnetic interference suppressor 5 connected to the low voltage signal line;
The power battery box 6, the quick-charging connector 1 is arranged on the power battery box, and the battery module 2, the battery management system 3, the first electromagnetic interference suppressor 4 and the second electromagnetic interference suppressor 5 are arranged inside the power battery box 6.
It should be noted that, the control line and the energy transmission line where the charging module interacts with the electric vehicle are designed integrally, and a higher transient voltage on the energy transmission line connected to the high-voltage relay is coupled to the control line, that is, the wake-up signal transmitted on the control line may be doped with a higher transient voltage, and in general, the higher transient voltage coupled on the control line may be referred to as electromagnetic interference.
In the embodiment of the invention, the fast-charging wire harness of the fast-charging connector 1 binds the fast-charging high-voltage wire harness and the low-voltage signal wire together, and the fast-charging high-voltage wire harness and the low-voltage signal wire harness are separately laid out in the power battery box 6 in order to reduce crosstalk coupling between the high-voltage wire harness and the low-voltage wire harness. The charging module comprises: the quick-charging connector 1 is connected with the battery module 2 through a quick-charging high-voltage line and connected with the battery management system 3 through a low-voltage signal line; the quick charging connector is applied to high-power charging equipment, the quick charging high-voltage line can bear 700V direct current, the charging current can reach 500A, and the problem of electromagnetic interference caused by the fact that a traditional charging module couples the quick charging high-voltage line with a low-voltage signal line is avoided.
Specifically, a first electromagnetic interference suppressor 4 is arranged between the quick-charging connector 1 and the battery module 2, and the first electromagnetic interference suppressor is connected to the quick-charging high-voltage line, so that the interference intensity caused by high-voltage direct current is reduced; a second electromagnetic interference suppressor 4 is arranged between the quick-charging connector 1 and the battery management system 3, so that the signal quality of the low-voltage signal line is improved; the module that charges still includes: the power battery box 6, the quick-charging connector 1 is arranged on the power battery box, and the battery module 2, the battery management system 3, the first electromagnetic interference suppressor 4 and the second electromagnetic interference suppressor 5 are arranged in the power battery box 6, so as to further protect main devices of the charging module.
Further, the first electromagnetic interference suppressor 4 and the second electromagnetic interference suppressor 5 each include:
the electromagnetic interference suppression circuit is connected with the fast-charging high-voltage line or the low-voltage signal line;
a metal shell surrounding the electromagnetic interference suppression circuit; the metal shell is connected with the power battery box 6 through a metal circuit, and the electromagnetic interference suppression circuit is connected with the metal shell through a metal circuit.
In this embodiment, the electromagnetic interference suppression circuit receives the characteristic that single-point grounding or multi-point grounding can be performed according to actual requirements, and the low-frequency part of the charging module is grounded near the single-point, and the high-frequency part is grounded by adopting the multi-point. Of course, the method of canceling the differential mode interference by using the differential mode capacitor can also be adopted to solve the problem of electromagnetic interference suppression, and when the X and Y capacitors are selected in the design of the electromagnetic interference suppression circuit, the requirements of capacitance, voltage-resistant level and safety level are paid attention to because they are directly related to the safety performance of the electromagnetic interference suppression circuit; grounding in electronic devices is one of the important methods of suppressing electromagnetic noise and preventing electromagnetic interference as well as protecting personnel and equipment from safety. The base and the metal shell must be reliably grounded when the electronic equipment is required, and the base and the metal shell are used for protecting the safety of personnel and the equipment, and are called as 'protection grounding'; another type of grounding is referred to as "shielding grounding", and refers to grounding of a shielding layer (body) used for suppressing interference, so as to perform a good anti-interference effect, so that the first electromagnetic interference suppressor 4 and the second electromagnetic interference suppressor 5 respectively include: the metal shell is arranged around the periphery of the electromagnetic interference suppression circuit, wherein the metal shell is connected with the power battery box 6 through a metal circuit, and the electromagnetic interference suppression circuit is connected with the metal shell through a metal circuit.
Specifically, as shown in fig. 1, the first electromagnetic interference suppressor 4 is connected to the power battery box 6 through a first bonding wire 81, because the first bonding wire 81 is disposed between the metal housing of the first electromagnetic interference suppressor 4 and the power battery box 6 made of metal, and the electromagnetic interference suppressing circuit is connected to the metal housing through a metal wire, and by this arrangement of "shielding and grounding", a good anti-interference effect is provided for the electromagnetic interference suppressing circuit in the metal housing; similarly, the second electromagnetic interference suppressor 5 is connected to the power battery box 6 through a second bonding wire 82, so as to avoid doping electromagnetic interference in the electromagnetic interference suppressing circuits in the first electromagnetic interference suppressor 4 and the second electromagnetic interference suppressor 5.
Specifically, the electromagnetic interference suppression circuit includes:
At least one magnetic ring; wherein the magnetic ring of the first electromagnetic interference suppressor 4 is arranged around the fast-charging high-voltage line; the magnetic ring of the second electromagnetic interference suppressor 5 surrounds the low voltage signal line;
At least one capacitor bank circuit; the capacitor bank circuit comprises at least two capacitors connected in series;
One end of the capacitor bank line of the first electromagnetic interference suppressor 4 is connected with a first line of the fast-charging high-voltage line, and the other end of the capacitor bank line is connected with a second line of the fast-charging high-voltage line;
One end of the capacitor group line of the second electromagnetic interference suppressor 5 is connected to a third line of the low voltage signal line, and the other end is connected to a fourth line of the low voltage signal line.
It should be noted that, the magnetic ring can effectively inhibit electromagnetic radiation interference of the switching power supply by adopting a shielding technology, that is, the electric field is shielded by using a material with good conductivity, the magnetic field is shielded by using a material with high magnetic permeability, and the shielding has two purposes, namely, the leakage of electromagnetic energy radiated from the interior is limited, and the external radiation interference is prevented from entering the interior area, and the principle is that the reflection, absorption and guiding effects of the electromagnetic energy by using the shielding body are utilized.
In this embodiment, the electromagnetic interference suppression circuit is provided with at least one magnetic ring, the magnetic ring is arranged around the wire harness of the electromagnetic interference suppression circuit, the magnetic ring of the first electromagnetic interference suppressor 4 is arranged around the fast-charging high-voltage wire, the magnetic ring of the second electromagnetic interference suppressor 5 is arranged around the low-voltage signal wire, the number of the magnetic rings is not limited, and of course, the number of the magnetic rings can achieve better effect, and two magnetic rings are preferably arranged in consideration of the volume in the circuit; because the quick charge high-voltage line and the low-voltage signal line of the charging module are both double-line, the electromagnetic interference suppression circuit further comprises: at least one capacitor bank circuit; the capacitor bank circuit comprises at least two capacitors connected in series, wherein one end of the capacitor bank circuit in the first electromagnetic interference suppressor 4 is connected with a first circuit in the fast-charging high-voltage line, the other end of the capacitor bank circuit is connected with a second circuit in the fast-charging high-voltage line, and a connecting point of the two capacitors is connected to a metal shell of the first electromagnetic interference suppressor 4.
Specifically, the capacitors in the capacitor group circuit are all Y capacitors with the same specification and model.
It should be noted that, by changing the capacitance value in the capacitor bank, electromagnetic interference of different hertz signals can be suppressed. For example, the same Y capacitance of 0.22uf is set to have different effects from the Y capacitance of other capacities, and the capacitance value of the capacitance group can be adjusted according to specific use requirements.
Further, the electromagnetic interference suppression circuit further includes:
A first connection line and a second connection line;
the first connecting line is connected with a first line in the fast-charging high-voltage line, and the second connecting line is connected with a second line of the fast-charging high-voltage line; or alternatively
The first connecting line is connected with a third line in the low-voltage signal line, and the second connecting line is connected with a fourth line in the low-voltage signal line;
the first circuit in the fast-charging high-voltage line is an anode circuit, and the second circuit in the fast-charging high-voltage line is a cathode circuit; and the third circuit and the fourth circuit in the low-voltage signal line are both signal circuits.
Further, the electromagnetic interference suppression circuit in the first electromagnetic interference suppressor 4 further includes:
and one end of the X capacitor is connected with the first circuit in the fast-charging high-voltage line, and the other end of the X capacitor is connected with the second circuit of the fast-charging high-voltage line.
Specifically, as shown in fig. 1, the electromagnetic interference suppression circuit in the first electromagnetic interference suppressor 4 includes:
A first connection line 41 connecting a first line of the fast-charging high-voltage lines, and a second connection line 42 connecting a second line of the fast-charging high-voltage lines;
A first capacitor group, i.e., a first capacitor Y1 and a second capacitor Y1, connected in series between the first connection line 41 and the second connection line 42;
And a second capacitor group, namely a third capacitor Y3 and a fourth capacitor Y4, connected in series between the first connection line 41 and the second connection line 42;
Wherein, the connection point of the first capacitor Y1 and the second capacitor Y1, and the connection point of the third capacitor Y3 and the fourth capacitor Y4 are respectively connected to the metal shell in the first electromagnetic interference suppressor 4;
the electromagnetic interference suppression circuit further includes: two magnetic rings, namely a first magnetic ring L1 and a second magnetic ring L2, are disposed around the first connection line 41 and the second connection line 42.
The electromagnetic interference suppression circuit at one end of the connection quick charge connector 1 further includes: an X capacitor connected in series between the first connection line 41 and the second connection line 42.
According to the invention, by arranging the electromagnetic interference suppression circuit specifically, the electromagnetic interference suppression circuit is connected with the metal conductor of the power battery box 6 through the metal circuit, so that the grounding reliability is ensured; the electromagnetic interference suppression circuit in the first electromagnetic interference suppressor 4 mainly comprises an X capacitor (C1), a Y capacitor (Y1, Y2, Y3 and Y4), and magnetic rings (L1 and L2). C1 is mainly used for filtering out differential mode interference between high-voltage direct current positive and negative electrode wire harnesses. The L1 and the L2 are mainly used for filtering common-mode interference, and because the fast-charging high-voltage line far exceeds the low-voltage signal line in line diameter, the fast-charging high-voltage line cannot be wound on the L1 and the L2 for a plurality of turns, the fast-charging high-voltage line passes through the L1 and the L2, the thickness of the L1 and the L2 needs to be increased for improving the inductance or the common-mode interference inhibition capability, and magnetic rings of different materials can be selected according to design and test results, and the fast-charging high-voltage line is designed into a ferrite magnetic ring. The Y capacitor is mainly used for filtering high-voltage common-mode interference, one ends of Y1 and Y3 are connected to one line of the fast-charging high-voltage line, one ends of Y2 and Y4 are connected to the other line of the fast-charging high-voltage line, and common ends of Y1, Y2, Y3 and Y4 are connected to the metal shell, so that the power battery box body is finally obtained by referencing the ground. The first electromagnetic interference suppressor 4 is mainly used for reducing the conduction interference on the high-voltage direct current line, so that the voltage fluctuation on the battery module 2 is reduced, and the service life impact of the interference on the battery module 2 is reduced.
Specifically, as shown in fig. 2, the electromagnetic interference suppression circuit in the second electromagnetic interference suppressor 5 includes:
a first connection line CC1 connecting a third line of the low voltage signal lines, and a second connection line CC2 connecting a fourth line of the low voltage signal lines;
A third capacitor group, namely a fifth capacitor Y5 and a sixth capacitor Y6, connected in series between the first connection line CC1 and the second connection line CC 2;
And a fourth capacitor group, namely a seventh capacitor Y7 and an eighth capacitor Y8, connected in series between the first connection line CC1 and the second connection line CC 2;
wherein, the connection point of the fifth capacitor Y5 and the sixth capacitor Y6, the connection point of the seventh capacitor Y7 and the eighth capacitor Y8 are respectively connected to the metal shell in the second electromagnetic interference suppressor 5;
the electromagnetic interference suppression circuit further includes: two magnetic rings, namely a third magnetic ring L3 and a fourth magnetic ring L4, are arranged around the first connection line CC1 and the second connection line CC 2.
The second electromagnetic interference suppressor 5 is mainly composed of magnetic rings (L3 and L4), Y capacitors (Y5, Y6, Y7 and Y8), wherein the Y capacitors are connected with a metal shell in the second electromagnetic interference suppressor 5 by specifically arranging the electromagnetic interference suppression circuit. The metal case of the second electromagnetic interference suppressor 5 is electrically connected to the metal conductive part of the power battery case 6 or the like. The second electromagnetic interference suppressor 5 is mainly used for reducing electromagnetic interference coupled to the low-voltage signal line from the fast-charging high-voltage line, thereby ensuring the signal quality output to the battery management system 3 and being beneficial to ensuring the reliable operation of the low-voltage device.
Specifically, the charging module further includes:
A high-voltage relay provided between the battery module 2 and the first electromagnetic interference suppressor 4.
The high-voltage relay is provided between the battery module 2 and the first electromagnetic interference suppressor 4, so that a circuit with high power, i.e., a circuit with high voltage line charged quickly, can be controlled with a very small control amount. Under normal operation, the first electromagnetic interference suppressor 4 is connected to a fast charging high-voltage line, so that the current is completely blocked when the charging is completed, hundreds of amperes of current can be borne, and the power consumption is low; when there is a fault, i.e. the circuit of the first electromagnetic interference suppressor 4 is overloaded (in particular short-circuited), the contacts must remain closed as long as the relay is energized; the high voltage relay must still be able to separate the circuit after overload, and be able to cut off the high current through the fast charging high voltage line.
Further, as shown in fig. 1, the charging module of the present invention includes: the first high-voltage relay SW1 and the second high-voltage relay SW2 are connected to the first connection line 41 and the second connection line 42 of the first electromagnetic interference suppressor 4, respectively. Of course, if the number of lines passing through the first electromagnetic interference suppressor 4 is greater than two, the number of high-voltage relays may be arranged correspondingly according to the number of lines of the first electromagnetic interference suppressor 4.
Further, as shown in fig. 1 and 2, the charging module further includes:
And the ground line PE is arranged on the low-voltage signal line and is respectively connected with the power battery box 6 and the metal shell of the second electromagnetic interference suppressor 5.
It should be noted that, the ground wire PE is connected to the metal housing of the power battery case 6 and the second electromagnetic interference suppressor 5, so as to prevent an electric shock accident of the charging module due to the electrification of the internal insulation breaking housing. The ground wire is short for the earthing device. The ground wire is divided into working ground and safety ground. The protection grounding wire can prevent electric shock accidents from happening when the charging module is used, and is safe to perform in order to protect the normal circuits and devices in the charging module. The second electromagnetic interference suppressor 5 in fig. 2 is therefore mainly composed of magnetic rings (L3 and L4), Y capacitors (Y5, Y6, Y7 and Y8), wherein the common terminal of the PE line and the Y capacitor is connected to the metal housing of the second electromagnetic interference suppressor 5.
Further, the charging module further includes:
the quick charge seat 7 is connected with the quick charge connector 1 through the quick charge high-voltage line, the low-voltage signal line and the ground line;
And the outer parts of the fast-charging high-voltage wire, the low-voltage signal wire and the ground wire are provided with insulating jackets.
It should be noted that the quick charge holder 7 may be fixedly mounted on the body of the electric vehicle, and the quick charge holder 7 is used for being connected with a high-power charging device. At the vehicle end, the quick charge holder 7 is connected to the quick charge connector 2 through a quick charge cable, and the quick charge cable includes a quick charge high voltage line, low voltage signal lines (CC 1 and CC 2), and a PE line (protection ground line). By arranging the quick charging seat 7, the charging module is applied to high-power charging equipment, high-power charging can be realized, and the charging efficiency of the electric automobile is improved.
The embodiment of the invention also provides an electric automobile, which comprises the charging module.
In the charging module in the electric automobile provided by the embodiment of the invention, high-power charging can be realized, the interference intensity caused by high-voltage direct current is reduced, the signal quality of a low-voltage signal wire is improved, and the impact of high-voltage direct current conduction interference on the service life of a power battery is reduced. The invention considers the improvement of the power battery conduction immunity, and solves the problem that the high-power charging function is invalid due to electromagnetic interference of the charging module in high-power charging.
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 changes can be made without departing from the principles of the present invention, and such modifications and changes are intended to be within the scope of the present invention.
Claims (7)
1. A module that charges, includes battery module (2) and battery management system (3), its characterized in that, the module that charges still includes:
the quick-charging connector (1) is connected with the battery module (2) through a quick-charging high-voltage line and is connected with the battery management system (3) through a low-voltage signal line;
a first electromagnetic interference suppressor (4) connected to the fast-charging high-voltage line;
a second electromagnetic interference suppressor (5) connected to the low voltage signal line;
The quick-charging connector (1) is arranged on the power battery box body, and the battery module (2), the battery management system (3), the first electromagnetic interference suppressor (4) and the second electromagnetic interference suppressor (5) are arranged in the power battery box body (6);
Wherein the first electromagnetic interference suppressor (4) and the second electromagnetic interference suppressor (5) each comprise:
the electromagnetic interference suppression circuit is connected with the fast-charging high-voltage line or the low-voltage signal line;
A metal shell surrounding the electromagnetic interference suppression circuit; the metal shell is connected with the power battery box body (6) through a metal circuit, and the electromagnetic interference suppression circuit is connected with the metal shell through a metal circuit;
The module that charges still includes: the quick charging seat (7), the quick charging seat (7) is connected with the quick charging connector (1) through the quick charging high-voltage line, the low-voltage signal line and the ground line; the quick charging seat (7) is fixedly arranged on the body of the electric automobile, and the quick charging seat (7) is used for being connected with high-power charging equipment; wherein, the outside of the high-voltage line, the low-voltage signal line and the ground wire is provided with an insulating sheath;
Wherein the electromagnetic interference suppression circuit includes:
At least one magnetic ring; wherein the magnetic ring of the first electromagnetic interference suppressor (4) is arranged around the fast-charging high-voltage line; the magnetic ring of the second electromagnetic interference suppressor (5) surrounds the low voltage signal line;
At least one capacitor bank circuit; the capacitor bank circuit comprises at least two capacitors connected in series;
One end of the capacitor group circuit of the first electromagnetic interference suppressor (4) is connected with a first circuit in the fast-charging high-voltage line, and the other end of the capacitor group circuit is connected with a second circuit of the fast-charging high-voltage line;
One end of the capacitor group circuit of the second electromagnetic interference suppressor (5) is connected with a third circuit in the low-voltage signal line, and the other end of the capacitor group circuit is connected with a fourth circuit in the low-voltage signal line.
2. The charging module of claim 1, wherein the electromagnetic interference suppression circuit further comprises:
A first connection line and a second connection line;
the first connecting line is connected with a first line in the fast-charging high-voltage line, and the second connecting line is connected with a second line of the fast-charging high-voltage line; or alternatively
The first connecting line is connected with a third line in the low-voltage signal line, and the second connecting line is connected with a fourth line in the low-voltage signal line;
the first circuit in the fast-charging high-voltage line is an anode circuit, and the second circuit in the fast-charging high-voltage line is a cathode circuit; and the third circuit and the fourth circuit in the low-voltage signal line are both signal circuits.
3. The charging module of claim 1, wherein the capacitors in the capacitor bank lines are all Y capacitors of the same specification and model.
4. The charging module according to claim 1, wherein the electromagnetic interference suppression circuit in the first electromagnetic interference suppressor (4) further comprises:
and one end of the X capacitor is connected with the first circuit in the fast-charging high-voltage line, and the other end of the X capacitor is connected with the second circuit of the fast-charging high-voltage line.
5. The charging module of claim 1, wherein the charging module further comprises:
And the high-voltage relay is arranged between the battery module (2) and the first electromagnetic interference inhibitor (4).
6. The charging module of claim 1, wherein the charging module further comprises:
the ground wire is arranged on the low-voltage signal wire and is respectively connected with the power battery box body (6) and the metal shell of the second electromagnetic interference suppressor (5).
7. An electric vehicle comprising a charging module according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010894645.XA CN114103664B (en) | 2020-08-31 | 2020-08-31 | Charging module and electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010894645.XA CN114103664B (en) | 2020-08-31 | 2020-08-31 | Charging module and electric automobile |
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| CN114103664A CN114103664A (en) | 2022-03-01 |
| CN114103664B true CN114103664B (en) | 2024-04-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114423270B (en) * | 2022-03-04 | 2023-09-15 | 长春捷翼汽车科技股份有限公司 | Circuit for reducing electromagnetic interference, distribution box, new energy automobile and method |
| CN115473013A (en) * | 2022-09-26 | 2022-12-13 | 梅赛德斯-奔驰集团股份公司 | Bus bar assembly for power battery pack and power battery pack |
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| CN207449663U (en) * | 2017-11-27 | 2018-06-05 | 北京新能源汽车股份有限公司 | Charging pile |
| CN208369294U (en) * | 2018-07-19 | 2019-01-11 | 北京新能源汽车股份有限公司 | Circuit for suppressing conductive interference, slow charging box and automobile |
| CN210168020U (en) * | 2019-08-29 | 2020-03-20 | 北京新能源汽车股份有限公司 | High-voltage direct-current port electromagnetic interference suppression device and electric automobile |
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2020
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207449663U (en) * | 2017-11-27 | 2018-06-05 | 北京新能源汽车股份有限公司 | Charging pile |
| CN208369294U (en) * | 2018-07-19 | 2019-01-11 | 北京新能源汽车股份有限公司 | Circuit for suppressing conductive interference, slow charging box and automobile |
| CN210168020U (en) * | 2019-08-29 | 2020-03-20 | 北京新能源汽车股份有限公司 | High-voltage direct-current port electromagnetic interference suppression device and electric automobile |
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