CN105702896B - The passive join protection system and method for master based on battery pack buffer unit - Google Patents
The passive join protection system and method for master based on battery pack buffer unit Download PDFInfo
- Publication number
- CN105702896B CN105702896B CN201610222267.4A CN201610222267A CN105702896B CN 105702896 B CN105702896 B CN 105702896B CN 201610222267 A CN201610222267 A CN 201610222267A CN 105702896 B CN105702896 B CN 105702896B
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- Prior art keywords
- battery pack
- buffer unit
- distance measuring
- ultrasonic distance
- module
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/579—Devices or arrangements for the interruption of current in response to shock
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
A kind of passive join protection system and method for master based on battery pack buffer unit, including：Battery pack buffer unit, processing unit, acceleration module and ultrasonic distance measuring module, wherein：Acceleration module is arranged at the surface of battery pack buffer unit, and ultrasonic distance measuring module is arranged on vehicle body, and single-chip microcomputer is respectively connected with acceleration module and ultrasonic distance measuring module；When electric automobile does not crash, single-chip microcomputer judges whether to send power-off signal to battery pack according to ultrasonic distance measuring module real-time range measurement result；When electric automobile crashes, battery pack buffer unit carries out release buffering to built-in battery pack, and the acceleration measurement that single-chip microcomputer obtains according to the acceleration module being connected with battery pack buffer unit judges whether to send power-off signal to battery pack；The present invention is reasonable in design, can select installation position and arrange parameter as needed, flexible function, safeguard simple.
Description
Technical field
The present invention relates to a kind of technology in electric automobile field, specifically a kind of master based on battery pack buffer unit
Passive join protection system and method.
Background technology
With expanding economy, automobile market is closely being quickly grown during the last ten years.Particularly in recent years, as auto industry
In an important branch, electric automobile industry shows the trend of rapid growth.The thing followed, it is and electric automobile phase
The traffic accident quantity of pass is constantly soaring.Electric automobile is when occurring two car collision accidents, if the impaired rupture of battery pack, leakage
Electrolyte short-circuit loop can be produced outside battery, cause it is on fire, blast etc. second accident.Relative to orthodox car, electronic vapour
The consequence of car accident is often more serious.The presence of second accident threatens the safety of electric automobile occupant, is also accident treatment
Add difficulty.
Currently for batteries of electric automobile group protection research mainly around two aspect deploy, when from strengthen vehicle body knot
Structure is started with, part made of the main portions installation special material in vehicle body, improves the intensity and crash-worthiness of vehicle body；Second, optimization
The structure of battery bag, such as battery bag layout type, top cover, gusset, base, bottom plate, pallet, fixed support, chassis, so as to carrying
The security of high battery pack.Though these safeguard measures can reduce damage journey of the battery pack in collision accident to a certain extent
Degree, but certain limitation often be present as a kind of passive safety precautions, their protective capability.Work as collision accident
When the impulsive force of application on the battery pack is excessive, the risk that second accident occurs still is present.
Found by the retrieval to prior art, Chinese patent literature CN104701475A, date of publication 2015.6.10,
Disclose a kind of anticollision power battery module device, including clamp system, collision feeler lever and loosening mechanism；Clamping frames and pre-
The setting of tight part causes electrokinetic cell to keep stable, collides the setting of feeler lever and loosening mechanism, monitors whether to occur by feeler lever
Collision and extruding, once feeler lever detects that collision and extruding occur, horizontal loosening mechanism and longitudinal loosening mechanism are triggered to dynamic
Power battery is loosened so that fixed electrokinetic cell is released.But the technical pattern is complicated, and work as what is be collided and extrude
When power is excessive, the electrokinetic cell without power-off still has the risk for triggering second accident.
The content of the invention
The present invention is directed to deficiencies of the prior art, proposes that a kind of master based on battery pack buffer unit passively ties
Protection system and method is closed, the battery pack buffer unit of absorbable collision energy is made up of torsion spring and rod member, battery pack is entered
Row release buffering；In combination with ultrasonic distance measuring module and acceleration module, analyzed by single-chip microcomputer and send control signal with
The power on/off of battery pack is controlled, active protection and the passive protection of the front and rear batteries of electric automobile group of collision is realized, prevents secondary
The generation of accident.
The present invention is achieved by the following technical solutions：
The present invention relates to a kind of passive join protection system of master based on battery pack buffer unit, including：Battery pack buffers
Device, processing unit, acceleration module and ultrasonic distance measuring module, wherein：Acceleration module is arranged at battery pack buffer unit
Surface, ultrasonic distance measuring module is arranged on vehicle body, and single-chip microcomputer is respectively connected with acceleration module and ultrasonic distance measuring module.
Described battery pack buffer unit includes：The matrix pattern of a pair of torsion bars, eight buffer bars and a pair of parallel setting
Meet face head-on, wherein：Buffer bar one end is connected with the end of torsion bar, and the flex point that the other end meets face edge head-on with matrix pattern is connected,
Every one end of torsion bar is connected with two buffer bars.
Described buffer bar is connected with torsion bar by torsion spring, and can be rotated in the horizontal plane around torsion bar；Buffer bar
The flex point for meeting face edge head-on with matrix pattern is hinged, and the vertical bar that can meet face head-on around matrix pattern rotates in the horizontal plane.
Described matrix pattern is met face center head-on and is connected provided with fixed connection structure with vehicle body.
The present invention relates to a kind of active guard method based on above-mentioned protection system, when electric automobile normally travel, peace
Ultrasonic distance measuring module outside car body detects the distance between electric automobile and other vehicles and relative velocity in real time；When super
When the measurement result that sound ranging module returns to single-chip microcomputer meets certain impact conditions, single-chip microcomputer sends to battery pack and powered off
Signal is allowed to power off.
The present invention relates to a kind of passive protection method based on above-mentioned protection system, when electric automobile crashes
When, battery pack buffer unit carries out buffer protection to built-in battery pack, and single-chip microcomputer with battery pack buffer unit according to being connected
The acceleration measurement that acceleration module obtains judges whether to send power-off signal to battery pack；The impulsive force caused by collision
It is excessive, beyond battery pack buffer unit protection limit when, acceleration module will by single-chip microcomputer to battery pack send power off
Signal.
Technique effect
Compared with prior art, one aspect of the present invention using battery pack buffer unit to collision accident occur it is after-applied
Impulsive force in battery pack is absorbed and disperseed, and on the other hand can utilize ultrasonic distance measuring module and single-chip microcomputer in collision accident
Judged before generation, control the power-off of battery pack, make battery pack even if rupture leakage will not also occur it is on fire blast etc. it is secondary
Accident, reasonable in design, dependable performance.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention；
Fig. 2 is battery pack buffer unit explosive view；
Fig. 3 is battery pack buffer unit structure schematic diagram；
Fig. 4 is buffer bar and torsion bar connection diagram；
Fig. 5 is ultrasonic distance measuring module operating diagram；
Fig. 6 is acceleration module operating diagram；
In figure：1 is that matrix pattern meets face head-on, and 2 be buffer bar, and 3 be torsion bar, and 4 be fixed connection structure, and 5 be torsion spring rod end
Portion.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
As shown in figure 1, the present embodiment is related to a kind of passive join protection system of master based on battery pack buffer unit, bag
Include：Battery pack buffer unit, processing unit, acceleration module and ultrasonic distance measuring module, wherein：Acceleration module is arranged at electricity
The surface of pond group buffer unit, the shock being subject to for monitoring electric car body；Ultrasonic distance measuring module is arranged on vehicle body,
For monitoring the distance of electric automobile and other vehicles, single-chip microcomputer is respectively connected with acceleration module and ultrasonic distance measuring module,
For sending control signal.
Described acceleration module is ADXL345, ultrasonic distance measuring module HC-SR04.
As shown in Figures 2 and 3, described battery pack buffer unit includes：A pair of torsion bars, 3, eight buffer bars 2 and a pair
The matrix pattern be arrangeding in parallel meets face 1 head-on, wherein：The one end of buffer bar 2 is connected with the end 5 of torsion bar 3, and the other end is met with matrix pattern
The flex point for hitting the edge of face 1 is connected, and every one end 5 of torsion bar 3 is connected with two buffer bars 2.
As shown in figure 4, described buffer bar 2 is connected with torsion bar 3 by torsion spring, and can be around torsion bar 3 in horizontal plane
Interior rotation；The flex point that buffer bar 2 meets the edge of face 1 head-on with matrix pattern is hinged, and can meet the vertical bar in face 1 head-on around matrix pattern in water
Rotation with surface.
Described matrix pattern meets the center of face 1 head-on and is provided with fixed connection structure 4, pre-threaded hole on fixed connection structure 4, with
Battery pack buffer unit is set to be fixedly installed on car body.
The width that described torsion bar 3 and the length of buffer bar 2, matrix pattern meet face 1 head-on regards the required battery pack placed
Depending on size.
The parameter of the torsion spring of described torsion bar 3 should combine the size of the end 5 of torsion bar 3, with reference to the choosing of concerned countries standard
Take.
Under original state, buffer bar 2 and matrix pattern meet the out of plumb of face 1 head-on, and with the same one end 5 of same torsion bar 3
The axis of two connected buffer bars 2 is not on the same line, but at a certain angle.
Described angle should follow " reversely acting it is maximum " principle choose, i.e., angle should cause whole battery pack protection to fill
Put during being collided by compression, torsion spring is met head-on to matrix pattern hinders work(maximum caused by face 1.
When described buffer bar 2 rotates, the vertical bar that can meet face 1 head-on around torsion bar 3 or matrix pattern turns in the horizontal plane
Dynamic, the torsion spring of torsion bar 3 can apply with relatively rotating in the opposite direction due to deformation to buffer bar 2 during relative rotation
Moment of torsion, hinder relatively rotate progress.
As shown in figure 5, the present embodiment is related to a kind of active guard method based on above-mentioned protection system, that is, work as electric automobile
During normally travel, the ultrasonic distance measuring module outside car body detect in real time the distance between electric automobile and other vehicles and
Relative velocity；When the measurement result that ultrasonic distance measuring module returns to single-chip microcomputer meets certain impact conditions, single-chip microcomputer to
Battery pack sends power-off signal and is allowed to power off；Specifically include following steps：
When step 1, electric automobile do not crash, ultrasonic distance measuring module sets timer work after initialization
Make mode and open interrupt switch, start timer 0 and check whether timer interrupts in real time.
Step 2, when the Abort Timer interruption times of ultrasonic distance measuring module record reach 30 times, single-chip microcomputer is to ultrasound
Ripple range finder module sends control signal, and Echo pins are changed into high level (1) from low level (0), and start timer 1.
If step 3, start timer 1 after Echo pins be changed into 0, Off Timer 1, at the same calculate electric automobile with
Distance between other vehicles, and store the result into the buffering area of ultrasonic distance measuring module.
Step 4, single-chip microcomputer extract measurement result from the buffering area of ultrasonic distance measuring module, and judge electric automobile and other
Whether the distance between vehicle exceeds safe range；If exceeding safe range, LED flicker, buzzer rings, single-chip microcomputer to
Battery pack sends power-off signal；Otherwise result is shown on charactron, realizes the active protection of batteries of electric automobile group.
As shown in fig. 6, the present embodiment is related to a kind of passive protection method based on above-mentioned protection system, i.e.,：When electronic vapour
When car crashes, battery pack buffer unit carries out buffer protection to built-in battery pack, single-chip microcomputer according to battery pack
The acceleration measurement that the connected acceleration module of buffer unit obtains judges whether to send power-off signal to battery pack；When touching
Impulsive force is excessive caused by hitting, beyond battery pack buffer unit protection limit when, acceleration module will by single-chip microcomputer to
Battery pack sends power-off signal；Specifically include following steps：
When step 1, collision accident occur, battery pack buffer unit carries out buffer protection to built-in battery pack, adds simultaneously
Self-test is carried out after acceleration module power-up initializing, reads the current state code of acceleration module；If state code is not just
During constant value, LED alarms.
Described buffer protection refers to：When electric automobile crashes, the impulsive force that battery pack is subject to acts on first
Meet the fixed connection structure 4 on face 1 head-on to matrix pattern, in the presence of impulsive force, whole battery pack buffer unit perpendicular to
Matrix pattern is met head-on to be compressed on the direction in face 1；Due to being had a certain degree between connected buffer bar 2, buffered in battery pack
During device is compressed, buffer bar 2 can relatively rotate around torsion bar 3；Torsion spring produces one and hindered relatively immediately
The torque of rotation, plays cushioning effect.
The normal value of described state code is 0xE5.
After step 2, confirmation acceleration module are working properly, acceleration module sends initial signal to single-chip microcomputer and storage is single
First address, and initial signal and device address are sent again, read measurement result and be stored in the buffering area of acceleration module.
Described initial signal refers to：Data wire (SDA pins) and clock line (SCL pins) in acceleration module is pre-
High level is set to, low level is set to after the 5 μ s that are delayed.
Timer in step 3, acceleration module starts after completing initialization, and detects whether timer interrupts；If
Interrupt, then single-chip microcomputer reads measurement result from the buffering area of acceleration module and data changed, numerical value after conversion
During less than safety value, result is included on charactron；Otherwise result is shown on charactron, buzzer rings are alarmed, and to
Battery pack sends power-off signal, prevents the generation of second accident, acceleration module is realized electronic jointly with battery pack buffer unit
The passive protection of automobile batteries group.
Ultrasonic distance measuring module in the present embodiment constantly sends out ultrasonic wave, using ultrasonic wave send with return when
Between it is poor, determine the distance of front vehicles, calculate speed using the change of distance, and accident is occurred according to speed and Distance Judgment
Risk：If two indices have exceeded default safe range, i.e., the data that the sensor in ultrasonic distance measuring module detects
When meeting car crass condition, then single-chip microcomputer can send power-off signal from trend automobile batteries group.
In the case of electric automobile normally travel, ultrasonic distance measuring module can detect electric automobile and other automobiles away from
From and relative velocity, when the distance that detects reaches impact conditions with relative velocity, ultrasonic distance measuring module can pass through monolithic
Machine sends power-off signal to battery pack.When electric automobile crashes, battery pack buffer unit is absorbable certain to be touched
Energy is hit, cushioning effect is played to battery.Meanwhile if acceleration caused by collision is excessive, the buffering of buffer unit is exceeded
Limit, then acceleration module power-off signal can be sent to battery pack by single-chip microcomputer, be allowed to power off.
Single-chip microcomputer in the present embodiment by sensing accordingly in programming Control acceleration module and ultrasonic distance measuring module
Device, it is more flexible to make entirely to lead passive join protection system use, is conveniently adjusted parameter, easy to maintain, meets different automobile types, no
With the demand of occasion, suitable for promoting.
Claims (4)
- A kind of 1. passive join protection system of master based on battery pack buffer unit, it is characterised in that including：Battery pack buffering dress Put, processing unit, acceleration module and ultrasonic distance measuring module, wherein：Acceleration module is arranged at battery pack buffer unit Surface, ultrasonic distance measuring module are arranged on vehicle body, and single-chip microcomputer is respectively connected with acceleration module and ultrasonic distance measuring module；Described battery pack buffer unit includes：The matrix pattern of a pair of torsion bars, eight buffer bars and a pair of parallel setting is met head-on Face, wherein：Buffer bar one end is connected with the end of torsion bar, and the flex point that the other end meets face edge head-on with matrix pattern is connected, torsion spring Every one end of bar is connected with two buffer bars；Described buffer bar is connected with torsion bar by torsion spring, and can be rotated in the horizontal plane around torsion bar；Buffer bar and field The flex point that font meets face edge head-on is hinged, and the vertical bar that can meet face head-on around matrix pattern rotates in the horizontal plane.
- 2. the passive join protection system of master according to claim 1, it is characterized in that, described matrix pattern is met face center head-on and set There is fixed connection structure to be connected with vehicle body.
- A kind of 3. active guard method for realizing the passive join protection system of the master of claim 1 or 2, it is characterised in that when During electric automobile normally travel, the ultrasonic distance measuring module outside car body detects between electric automobile and other vehicles in real time Distance and relative velocity；When the measurement result that ultrasonic distance measuring module returns to single-chip microcomputer meets certain impact conditions, Single-chip microcomputer sends power-off signal to battery pack and is allowed to power off.
- A kind of 4. passive protection method for realizing the passive join protection system of the master of claim 1 or 2, it is characterised in that when When electric automobile crashes, battery pack buffer unit carries out buffer protection to built-in battery pack, single-chip microcomputer according to The acceleration measurement that the connected acceleration module of battery pack buffer unit obtains judges whether to send power-off letter to battery pack Number；Impulsive force is excessive caused by collision, beyond battery pack buffer unit protection limit when, acceleration module will pass through list Piece machine sends power-off signal to battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610222267.4A CN105702896B (en) | 2016-04-12 | 2016-04-12 | The passive join protection system and method for master based on battery pack buffer unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610222267.4A CN105702896B (en) | 2016-04-12 | 2016-04-12 | The passive join protection system and method for master based on battery pack buffer unit |
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| Publication Number | Publication Date |
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| CN105702896A CN105702896A (en) | 2016-06-22 |
| CN105702896B true CN105702896B (en) | 2018-01-30 |
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| CN201610222267.4A Expired - Fee Related CN105702896B (en) | 2016-04-12 | 2016-04-12 | The passive join protection system and method for master based on battery pack buffer unit |
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| CN110911601A (en) * | 2019-11-19 | 2020-03-24 | 安徽省聚科石墨烯科技股份公司 | Graphene battery with damping effect |
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|---|---|---|---|---|
| CN102862483A (en) * | 2011-07-05 | 2013-01-09 | 皆盈绿动能科技股份有限公司 | Electric vehicle collision safety stopping system and method |
| CN103580073A (en) * | 2012-07-23 | 2014-02-12 | 群力电能科技股份有限公司 | Battery monitoring and protecting device and system and method thereof |
| CN203713578U (en) * | 2014-01-22 | 2014-07-16 | 金东纸业（江苏）股份有限公司 | Reverse anti-collision device for motor vehicles |
| CN104716284A (en) * | 2015-03-19 | 2015-06-17 | 中国汽车技术研究中心 | Safety device for power battery modules |
| CN205542982U (en) * | 2016-04-12 | 2016-08-31 | 上海交通大学 | Main protection system that combines passively based on group battery buffer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4066882B2 (en) * | 2003-05-22 | 2008-03-26 | トヨタ自動車株式会社 | Control device and control method for in-vehicle fuel cell power generation system |
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- 2016-04-12 CN CN201610222267.4A patent/CN105702896B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862483A (en) * | 2011-07-05 | 2013-01-09 | 皆盈绿动能科技股份有限公司 | Electric vehicle collision safety stopping system and method |
| CN103580073A (en) * | 2012-07-23 | 2014-02-12 | 群力电能科技股份有限公司 | Battery monitoring and protecting device and system and method thereof |
| CN203713578U (en) * | 2014-01-22 | 2014-07-16 | 金东纸业（江苏）股份有限公司 | Reverse anti-collision device for motor vehicles |
| CN104716284A (en) * | 2015-03-19 | 2015-06-17 | 中国汽车技术研究中心 | Safety device for power battery modules |
| CN205542982U (en) * | 2016-04-12 | 2016-08-31 | 上海交通大学 | Main protection system that combines passively based on group battery buffer |
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