CN110985591A - Controllable magnetorheological elastomer suspension system for power battery pack - Google Patents
Controllable magnetorheological elastomer suspension system for power battery pack Download PDFInfo
- Publication number
- CN110985591A CN110985591A CN201911297667.1A CN201911297667A CN110985591A CN 110985591 A CN110985591 A CN 110985591A CN 201911297667 A CN201911297667 A CN 201911297667A CN 110985591 A CN110985591 A CN 110985591A
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- Prior art keywords
- magnetorheological elastomer
- vibration isolator
- battery pack
- power battery
- semi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 68
- 239000000806 elastomer Substances 0.000 title claims abstract description 66
- 239000000725 suspension Substances 0.000 title claims abstract description 18
- 238000013016 damping Methods 0.000 claims abstract description 9
- 230000005291 magnetic effect Effects 0.000 claims description 23
- 230000005284 excitation Effects 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000001629 suppression Effects 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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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
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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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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- 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
Abstract
The invention discloses a controllable magneto-rheological elastomer suspension system for a power battery pack, which comprises: the magnetorheological elastomer vibration isolator and the semi-active control module; the semi-active control module outputs control current, and the control current is applied to the magnetorheological elastomer vibration isolator to change the rigidity and the damping characteristic of the vibration isolator. The semi-active vibration damping system can realize the semi-active suppression of the battery pack on the transmission vibration of the road surface and the vehicle body on the premise of not changing the existing mechanical structure of the power battery pack through the arrangement of the magneto-rheological elastomer vibration isolator and the semi-active controller, is suitable for equipment with large vibration noise in various working environments, can directly adopt various mature control algorithms, is easy to realize and verify, and further improves the universality and the reliability of the system.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a controllable magnetorheological elastomer suspension system for a power battery pack.
Background
Electric Vehicles (EV) have the advantages of low emission, low heat radiation, low noise, environmental friendliness and the like, and are a hot spot in the development of new energy vehicles in the 21 st century. At present, the bottleneck restricting the popularization and application of the EV is that the safety, reliability and durability of the Power Battery (PB) are not broken through.
One reason is that the current discharge rate of the power battery is high, thermal runaway is easy to generate, and the power battery is easy to damage or even detonate when being impacted. In addition, when the power battery works in a vibration state, random friction motion can occur to the electrolyte to influence the uniform distribution of the electrolyte, and particularly when the electrolyte is not full after the battery works for a period of time, long-time continuous or relatively violent vibration can not only cause deformation and even damage of a battery diaphragm, but also cause inconsistency of internal resistance and capacity of each single battery and a battery pack, and additional temperature rise is generated due to the random friction motion of the electrolyte to influence the stability of the discharge dynamic performance of the power battery, so that the power battery has not been paid high attention to the scholars at home and abroad.
The Magneto-rheological elastomer (MRE) is firstly proposed by scholars of Shiga and the like in 1995, is formed by doping micron-sized ferromagnetic particles into a high-molecular rubber matrix and solidifying, has the advantages of quick response, good reversibility, strong controllability and the like of a Magneto-rheological material and an elastomer, and is an ideal intelligent material for researching and developing a controllable Magneto-rheological elastomer vibration isolator of a power battery.
Extreme anti-impact performance has been considered in battery package structural design, and vehicle suspension has also effectively absorbed partial road surface vibration energy. The power battery mounted on the vehicle chassis belongs to a part of unsprung mass, a suspension system cannot fully isolate road vibration energy from being transmitted into the battery, and the power battery suspension system based on the controllable magnetorheological elastomer vibration isolator is established, so that the power battery suspension system is a new technology for effectively isolating the road vibration energy, and the development of the structure and magnetic circuit optimization design research work of the controllable magnetorheological elastomer vibration isolator is very difficult.
Disclosure of Invention
The invention aims to solve the technical problem of providing a controllable magnetorheological elastomer suspension system for a power battery pack, which can realize semi-active inhibition of the battery pack on the transmission of vibration on a road surface and a vehicle body and can be suitable for equipment with large vibration noise in various working environments.
In order to solve the above technical problem, the present invention provides a controllable magnetorheological elastomer suspension system for a power battery pack, comprising: the magnetorheological elastomer vibration isolator and the semi-active control module; the semi-active control module outputs control current, and the control current is applied to the magnetorheological elastomer vibration isolator to change the rigidity and the damping characteristic of the vibration isolator.
Preferably, the magnetorheological elastomer vibration isolator comprises a magnetorheological elastomer vibration isolator pad, a magnetic steel ring and an excitation coil; the excitation coil is wound on the magnetic conductive steel ring, the control current is applied to the excitation coil to generate a magnetic field, the rigidity and the damping characteristic of the magnetorheological elastomer vibration isolation pad under the magnetic field are changed, and the magnetic conductive steel ring, the excitation coil and the control current form the magnetorheological elastomer vibration isolation pad.
Preferably, the semi-active control module comprises a current driving circuit and a semi-active controller, wherein the semi-active controller obtains a driving current based on a control algorithm based on a vehicle body vibration state signal transmitted by the sensor during vehicle running, and the driving current is output to the excitation coil through the current driving circuit.
Preferably, the magnetorheological elastomer vibration isolator is arranged at the bottom of the power battery pack and is divided into a whole bottom arrangement and a local bottom arrangement.
Preferably, the design of the excitation coil of the magnetorheological elastomer vibration isolator ensures that the magnetorheological elastomer vibration isolator is enveloped in the magnetic field area of the excitation coil according to the arrangement mode of the magnetorheological elastomer vibration isolator.
Preferably, the control algorithm is divided into a force output type and a current output type, wherein the force output type needs to be combined with a calculation model of the magnetorheological elastomer to obtain an ideal driving current, and the current output type can directly use the obtained driving current.
The invention has the beneficial effects that: the semi-active vibration damping system can realize the semi-active suppression of the battery pack on the transmission vibration of the road surface and the vehicle body on the premise of not changing the existing mechanical structure of the power battery pack through the arrangement of the magneto-rheological elastomer vibration isolator and the semi-active controller, is suitable for equipment with large vibration noise in various working environments, can directly adopt various mature control algorithms, is easy to realize and verify, and further improves the universality and the reliability of the system.
Drawings
Fig. 1 is a schematic structural diagram of a new energy vehicle equipped with the system of the present invention.
FIG. 2 is a control schematic of the system of the present invention.
Fig. 3 is a schematic diagram of a quick-change battery pack of the north gasoline EU300 according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the magnetorheological elastomer vibration isolator according to the embodiment of the invention.
Detailed Description
As shown in fig. 1 and 2, a controllable magnetorheological elastomer suspension system for a power battery pack comprises: the magnetorheological elastomer vibration isolator and the semi-active control module; the semi-active control module outputs control current, and the control current is applied to the magnetorheological elastomer vibration isolator to change the rigidity and damping characteristic of the vibration isolator;
the magnetorheological elastomer vibration isolator comprises a magnetorheological elastomer vibration isolation pad, a magnetic steel ring and an excitation coil; the excitation coil is wound on the magnetic conductive steel ring, the control current is applied to the excitation coil to generate a magnetic field, and the rigidity and the damping characteristic of the magnetorheological elastomer vibration isolation pad under the magnetic field are changed, namely the three components jointly form the magnetorheological elastomer vibration isolation pad;
the semi-active control module comprises a current driving circuit and a semi-active controller, wherein the semi-active controller obtains driving current based on a control algorithm based on a vehicle body vibration state signal transmitted by a sensor during vehicle running, and the driving current is output to the magnet exciting coil through the current driving circuit.
The magnetorheological elastomer vibration isolator is arranged at the bottom of the power battery pack and is divided into integral arrangement and local arrangement at the bottom.
The design of the excitation coil of the magnetorheological elastomer vibration isolator ensures that the magnetorheological elastomer vibration isolator is enveloped in the magnetic field area of the excitation coil according to the arrangement mode of the magnetorheological elastomer vibration isolator.
The control algorithm is divided into a force output type and a current output type, wherein the force output type needs to be combined with a calculation model of the magnetorheological elastomer to obtain an ideal driving current, and the current output type can be directly used.
As shown in fig. 3, for a quick-change battery pack carrying a north steam EU300, an integrated structure mounting design of a controllable magnetorheological elastomer vibration isolator and the battery pack is adopted, the magnetorheological elastomer vibration isolator is arranged at the bottom in a battery pack box, a whole group of power batteries is arranged on the magnetorheological elastomer in a suspension mode, and the structural stress of a system is analyzed and the mounting and arrangement mode is optimized.
The magneto-rheological elastomer vibration isolator needs to bear hundreds of kilograms of weight of a power battery and is limited by the installation space of a vehicle chassis, so that the magneto-rheological elastomer vibration isolator is designed into a flat structure similar to a rubber vibration isolator, the requirement on reasonable structure does not influence the installation of a battery pack of the power battery, and the magnetic field intensity is uniformly distributed and the magnetic induction intensity is high.
FIG. 4 shows a thin circular controllable magnetorheological elastomer vibration isolator, H, for design1And R1Respectively representing the thickness and radius of the inner layer magnetorheological elastomer, H2Is a sum of R2Respectively shows the thickness and radius of the outer layer magnetic steel ring, and requires H1>H2And R1<R2So as to ensure that the magnetorheological elastomer has certain expansion and contraction spaces towards the periphery and the longitudinal direction respectively when the external magnetic field acts. The initial structure size is: h1＝4cm，H2＝2cm，R1＝25cm，R2When the magnetorheological elastomer is 26cm, a customized mode of self-design entrusted processing is adopted, or a sample meeting the requirements in the market is purchased; the magnetic circuit design is that a coil with a certain number of turns is wound on the outer side of the magnetic steel ring, and a uniformly distributed magnetic field is provided for the magnetorheological elastomer when a direct current i is applied.
Claims (6)
1. A controllable magnetorheological elastomer suspension system for a power battery pack, comprising: the magnetorheological elastomer vibration isolator and the semi-active control module; the semi-active control module outputs control current, and the control current is applied to the magnetorheological elastomer vibration isolator to change the rigidity and the damping characteristic of the vibration isolator.
2. The controllable magnetorheological elastomer suspension system for a power battery pack according to claim 1, wherein the magnetorheological elastomer vibration isolator comprises a magnetorheological elastomer vibration isolator pad, a magnetically permeable steel ring and an excitation coil; the excitation coil is wound on the magnetic conductive steel ring, the control current is applied to the excitation coil to generate a magnetic field, the rigidity and the damping characteristic of the magnetorheological elastomer vibration isolation pad under the magnetic field are changed, and the magnetic conductive steel ring, the excitation coil and the control current form the magnetorheological elastomer vibration isolation pad.
3. The controllable magnetorheological elastomer suspension system for a power battery pack as claimed in claim 1, wherein the semi-active control module comprises a current drive circuit and a semi-active controller, wherein the semi-active controller obtains a drive current based on a control algorithm based on a vehicle body vibration state signal during vehicle operation transmitted from a sensor, and outputs the drive current to the magnet exciting coil through the current drive circuit.
4. The controllable magnetorheological elastomer suspension system for a power battery pack as claimed in claim 1, wherein the magnetorheological elastomer vibration isolator is arranged at the bottom of the power battery pack and divided into a bottom overall arrangement and a bottom partial arrangement.
5. The controllable magnetorheological elastomer suspension system for a power battery pack according to claim 1, wherein the design of the field coil of the magnetorheological elastomer vibration isolator ensures that the magnetorheological elastomer vibration isolator is enveloped in the field region of the field coil according to the arrangement of the magnetorheological elastomer vibration isolator.
6. The controllable magnetorheological elastomer suspension system for a power battery pack as claimed in claim 3, wherein the control algorithm is classified into a force output type and a current output type, wherein the force output type is combined with a calculation model of the magnetorheological elastomer to obtain an ideal driving current, and the current output type can directly use the obtained driving current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911297667.1A CN110985591A (en) | 2019-12-17 | 2019-12-17 | Controllable magnetorheological elastomer suspension system for power battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911297667.1A CN110985591A (en) | 2019-12-17 | 2019-12-17 | Controllable magnetorheological elastomer suspension system for power battery pack |
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| CN110985591A true CN110985591A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911297667.1A Pending CN110985591A (en) | 2019-12-17 | 2019-12-17 | Controllable magnetorheological elastomer suspension system for power battery pack |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303174A (en) * | 2020-10-30 | 2021-02-02 | 广州大学 | Semi-active control vibration isolator based on magnetorheological elastomer and control method thereof |
| CN112670052A (en) * | 2020-12-15 | 2021-04-16 | 南京师范大学 | TMMRE-based active vibration reduction system for power transformer |
| CN112659875A (en) * | 2020-12-28 | 2021-04-16 | 奇瑞汽车股份有限公司 | Battery suspension and design method for improving smoothness of whole vehicle |
| CN113007076A (en) * | 2021-02-23 | 2021-06-22 | 北京化工大学 | Electromagnetic diaphragm metering pump based on magnetorheological elastomer |
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| CN108679160A (en) * | 2018-04-09 | 2018-10-19 | 华为技术有限公司 | A kind of vibration absorber, vibration insulating system and oscillation damping method |
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2019
- 2019-12-17 CN CN201911297667.1A patent/CN110985591A/en active Pending
Patent Citations (7)
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| CN102332549B (en) * | 2010-07-05 | 2014-04-02 | 阿自倍尔株式会社 | Field device with internal battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303174A (en) * | 2020-10-30 | 2021-02-02 | 广州大学 | Semi-active control vibration isolator based on magnetorheological elastomer and control method thereof |
| CN112670052A (en) * | 2020-12-15 | 2021-04-16 | 南京师范大学 | TMMRE-based active vibration reduction system for power transformer |
| CN112659875A (en) * | 2020-12-28 | 2021-04-16 | 奇瑞汽车股份有限公司 | Battery suspension and design method for improving smoothness of whole vehicle |
| CN113007076A (en) * | 2021-02-23 | 2021-06-22 | 北京化工大学 | Electromagnetic diaphragm metering pump based on magnetorheological elastomer |
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Application publication date: 20200410 |
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