CN108845263A - A kind of system and method detecting batteries of electric automobile involucrum bulk diffusion - Google Patents
A kind of system and method detecting batteries of electric automobile involucrum bulk diffusion Download PDFInfo
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- CN108845263A CN108845263A CN201810522829.6A CN201810522829A CN108845263A CN 108845263 A CN108845263 A CN 108845263A CN 201810522829 A CN201810522829 A CN 201810522829A CN 108845263 A CN108845263 A CN 108845263A
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Abstract
Embodiment of the present invention discloses a kind of system and method for detecting batteries of electric automobile involucrum bulk diffusion.The system includes：Brittle conductive material layer is arranged on the housing bottom inner surface of battery pack；The brittle conductive material layer includes the first connector and the second connector；The brittle conductive material layer is extended continuously on the first direction intersected with the traffic direction of the electric car；Controller is separately connected with first connector and the second connector, for issuing pulse width modulating signal to first connector, and when that cannot receive the pulse width modulating signal from second connector, issues alarm signal；Alarm unit, for issuing alarm based on the alarm signal.The present invention can detecte battery pack and be damaged situation, and issues prompt to driver in time.
Description
Technical field
Embodiment of the present invention is related to electric vehicle engineering field, in particular to a kind of detection batteries of electric automobile pack housing
The system and method for loss.
Background technique
Energy shortage, oil crisis and environmental pollution grow in intensity, and bring tremendous influence, direct relation to people's lives
To the sustainable development of national economy and society.Countries in the world are all in active development new energy technology.Electric car is as a kind of
Reduce the new-energy automobile of consumption of petroleum, low pollution, low noise, it is considered to be solve the important way of energy crisis and environmental degradation
Diameter.
The battery pack of electric car is usually placed in the chassis of vehicle, and the lower case bottom of battery pack is easy by ground object
The impact of matter.Such as：Slungshot, metal object, projection etc. be easy to cause battery pack housing distortion or directly damage, cause interior
The damage of portion's power battery may cause power battery kindling and even explode when serious.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of system for detecting batteries of electric automobile involucrum bulk diffusion and sides
Method, to improve safety.
The technical solution of embodiment of the present invention is as follows：
A kind of system detecting batteries of electric automobile involucrum bulk diffusion, the system include：
Brittle conductive material layer is arranged on the housing bottom inner surface of battery pack；The brittle conductive material layer includes
First connector and the second connector；The brittle conductive material layer is in the first direction intersected with the traffic direction of the electric car
On be extended continuously；
Controller is separately connected with first connector and the second connector, wide for issuing pulse to first connector
Modulated signal is spent, and when the pulse width modulating signal cannot be received from second connector, issues alarm signal；
Alarm unit issues alarm based on the alarm signal.
In one embodiment, there is slot, the brittle conductive material on the housing bottom inner surface of the battery pack
Layer arrangement is in the slot.
In one embodiment, the brittle conductive material layer is arranged in the shell bottom of the battery pack with buckle structure
On portion's inner surface.
In one embodiment, the brittle conductive material layer includes multiple vertical bending lines being equidistantly spaced from, institute
Stating vertical bending line includes orthogonal long side and short side, wherein the long side and the traffic direction of the electric car mutually hang down
Directly.
In one embodiment, the brittle conductive material layer includes at least one of following：
Electrically conductive graphite；Conductive carbon black；Conductive brass；Tin-phosphor bronze；Beryllium-bronze；Thick-film conductor material；Thin film of conductive material.
In one embodiment, brittle conductive material layer is perpendicular with the traffic direction of the electric car first
It is extended continuously on direction.
In one embodiment, the controller, the pulse cannot be received from second connector by being also used to work as
When bandwidth modulation signals, main positive relay open command and main negative relay open command are issued；
Wherein the positive relay of the master of the battery pack is disconnected based on the positive relay open command of the master, the battery pack
The negative relay of master be based on the negative relay open command of the master be disconnected.
A method of detection batteries of electric automobile involucrum bulk diffusion, this method include：
Arrange that brittle conductive material layer, the brittle conductive material layer include the on the housing bottom inner surface of battery pack
One connector and the second connector, the brittle conductive material layer is on the first direction intersected with the traffic direction of the electric car
It is extended continuously；
Pulse width modulating signal is issued to first connector；
When the pulse width modulating signal cannot be received from second connector, alarm signal is issued；
It is issued and is alarmed based on the alarm signal.
In one embodiment, this method further includes：
When the pulse width modulating signal cannot be received from second connector, issues main positive relay disconnection and refer to
Order and main negative relay open command；
Based on the positive relay of master that the positive relay open command of the master disconnects the battery pack, it is based on the negative relay of the master
Device open command disconnects the negative relay of master of the battery pack.
In one embodiment, described that brittle conductive material layer packet is arranged on the housing bottom inner surface of battery pack
It includes：
Arrangement is led comprising the brittleness of multiple vertical bending lines being equidistantly spaced from the housing bottom inner surface of battery pack
Material layer, the vertical bending line includes orthogonal long side and short side, wherein the long side and the electric car
Traffic direction is perpendicular, wherein by the brittle conductive material layer arrangement in the slot on the housing bottom inner surface or with card
Buckle structure is by the brittle conductive material layer arrangement on the housing bottom inner surface of the battery pack.
It can be seen from the above technical proposal that in embodiments of the present invention, which includes：Brittle conductive material layer,
It is arranged on the housing bottom inner surface of battery pack；Brittle conductive material layer includes the first connector and the second connector；Brittle conductive
Material layer is extended continuously on the first direction that the traffic direction with electric car intersects；Controller, with the first connector and second
Connector is separately connected, and for issuing pulse width modulating signal to the first connector, and is worked as and cannot be received pulse from the second connector
When bandwidth modulation signals, alarm signal is issued；Alarm unit, for issuing alarm based on alarm signal.As it can be seen that the present invention can be with
It detects battery pack and is damaged situation, and driver is issued prompt in time.
Moreover, the brittle conductive material layer of embodiment of the present invention has numerous embodiments, it can be with flexible Application.Especially
It is that, when brittle conductive material layer includes multiple vertical bending lines being equidistantly spaced from, vertical bending line includes orthogonal length
Side and short side can provide flexible fault detection when wherein the traffic direction of long side and electric car is perpendicular.
Detailed description of the invention
Only illustratively description and explain the present invention for the following drawings, not delimit the scope of the invention.
Fig. 1 is the first demonstrative structure figure of the system of present invention detection batteries of electric automobile involucrum bulk diffusion.
Fig. 2 is position schematic diagram of the brittle conductive material layer of the present invention in battery pack housing.
Fig. 3 is the exemplary schematic representation of pulse width modulating signal of the present invention.
Fig. 4 is the second demonstrative structure figure of the system of present invention detection batteries of electric automobile involucrum bulk diffusion.
Fig. 5 is the method flow diagram of present invention detection batteries of electric automobile involucrum bulk diffusion.
Fig. 6 is the third demonstrative structure figure of the system of present invention detection batteries of electric automobile involucrum bulk diffusion.
Fig. 7 is the variation schematic diagram of pulse width modulating signal of the present invention.
Fig. 8 is the exemplary flow chart of present invention detection batteries of electric automobile involucrum bulk diffusion.
Specific embodiment
In order to which the technical features, objects and effects of invention are more clearly understood, the Detailed description of the invention present invention is now compareed
Specific embodiment, identical label indicates identical part in the various figures.
It is succinct and intuitive in order to what is described, hereafter by describing several representative embodiments come to side of the invention
Case is illustrated.A large amount of details is only used for helping to understand the solution of the present invention in embodiment.However, it will be apparent that of the invention
Technical solution can be not limited to these details when realizing.In order to avoid unnecessarily having obscured the solution of the present invention, Yi Xieshi
It applies mode not described meticulously, but only gives frame.Hereinafter, " comprising " refers to " including but not limited to ", " root
According to ... " refer to " according at least to ..., but be not limited to according only to ... ".Due to the speech habits of Chinese, hereinafter without spy
When not pointing out the quantity of an ingredient, it is meant that the ingredient is either one or more, or can be regarded as at least one.
In view of the battery pack of electric car is usually placed in the chassis of vehicle, the lower case bottom of battery pack be easy by
Ground materials impact leads to the unsafe technical problem of battery, and embodiment of the present invention proposes a kind of detection batteries of electric automobile packets
The system of shell loss.
Fig. 1 is the first demonstrative structure figure of the system of present invention detection batteries of electric automobile involucrum bulk diffusion.The system
Shell for detecting batteries of electric automobile packet loses, especially damage caused by the impact of lower case bottom and ground materials
It loses.
As shown in Figure 1, the system includes：
Brittle conductive material layer 20 is arranged on the bottom interior surface 10 of the shell of battery pack；Brittle conductive material layer 20
Include the first connector 21 and the second connector 22；The first party that brittle conductive material layer 20 intersects in the traffic direction with electric car
It is extended continuously in (for example, longitudinal direction shown in FIG. 1)；
Controller 30 is separately connected with the first connector 21 and the second connector 22, wherein controller 30, the first connector 21, crisp
Property conductive material layer 20 and the second connector 22 constitute galvanic circle.Controller 30 is used to issue pulse width tune to the first connector 21
(PWM) signal is made, and when the pwm signal cannot be received from the second connector 22, issues alarm signal；
Alarm unit 31, for issuing alarm based on alarm signal.Alarm unit 31 and controller 30 by CANL line and
The connection of CANH line.
Brittle conductive material layer 20 includes brittle conductive material.Preferably, brittle conductive material layer may include in following
At least one：Electrically conductive graphite；Conductive carbon black；Conductive brass；Tin-phosphor bronze；Beryllium-bronze；Thick-film conductor material；Thin film conductive material
Material, etc..
Preferably, brittle conductive material layer includes electrically conductive graphite.It is furthermore preferred that brittle conductive material layer can be implemented and serve as reasons
The trajectory line that electrically conductive graphite is constituted.
The conductive properties of brittle conductive material guarantee along controller 30, the first connector 21,20 and of brittle conductive material layer
The galvanic circle that second connector 22 is constituted can transmit pwm signal.The brittleness attribute of brittle conductive material makes the bottom of shell
When impacting with ground materials, brittle conductive material layer 20 is easy to fracture.For example, slungshot, metal object, projection may make
Brittle conductive material layer 20 is obtained to fracture.
Brittle conductive material layer 20 is extended continuously on the first direction that the traffic direction with electric car intersects, therefore crisp
Property conductive material layer 20 can be with the bottom situation of good detection shell.When brittle conductive material layer 20 fractures, controller
30, the galvanic circle that the first connector 21, brittle conductive material layer 20 and the second connector 22 are constituted will rupture, and lead to controller 30
It is no longer able to receive pwm signal from the second connector 22.
Therefore, controller 30 may be based on whether that the PWM letter of the first connector 21 sending can be received from the second connector 22
Number and determine whether the housing bottom of battery pack occurs breakage.
Wherein, when controller 30 cannot receive the pwm signal from the second connector 22, alarm signal is issued；Work as control
When device 30 can receive the pwm signal from the second connector 22, shell normal signal is issued.
Alarm unit 31 is based on alarm signal and issues alarm, for example issues the warning notes such as acousto-optic-electric, such as in instrument
Customer's pulling over observing is prompted, and prompts further to call the shop 4S personnel maintenance far from vehicle.Moreover, alarm unit 31 is based on shell
Body normal signal issues prompt, for example shows that shell is normal in display screen.
Brittle conductive material layer 20 can be arranged in several ways on the bottom interior surface 10 of the shell of battery pack.Than
Such as, it slots on the housing bottom inner surface of battery pack, and brittle conductive material layer 20 is arranged in slot.For another example, may be used
Brittle conductive material layer 20 to be arranged on the housing bottom inner surface of the battery pack with buckle structure.
Specifically, controller 30 can be integrated into battery management system (BMS) or in entire car controller (VCU), also
Controller 30 can be embodied as and the independent special control circuit of BMS or VCU phase.
The above demonstration describes on the bottom interior surface 10 for the shell that brittle conductive material layer 20 is arranged in battery pack
Concrete mode is not intended to limit the present invention implementation it will be appreciated by those of skill in the art that this description is only exemplary
The protection scope of mode.
Preferably, brittle conductive material layer 20 continuously prolongs on the first direction perpendicular with the traffic direction of electric car
It stretches, to be more easily detected the situation of impact of the lower case bottom by ground materials.
In Fig. 1, brittle conductive material layer 20 includes multiple vertical bending lines being equidistantly spaced from, each vertical bending line
It is of similar shape and is connected with each other.For example, being illustrated by taking the leftmost vertical bending line 211 of Fig. 1 as an example.
Vertical bending line 211 includes the first long side 212, the second long side 213 and short side 214, wherein the first long side 212 and the
Two long sides 213 are parallel to each other, and the first long side 212 and the second long side 213 are mutually perpendicular to short side 214, and the first long side 212
It is perpendicular with the second long side 213 and the traffic direction of electric car.
Therefore, when electric car is run, if impact of the lower case bottom of battery pack by ground materials, first is long
Side 212 and the second long side 213 are easy to happen and fracture,
In one embodiment, controller 30 are also used to when that cannot receive pwm signal from the second connector 22, hair
Positive relay open command and main negative relay open command are led out；Wherein the positive relay 32 of the master of battery pack is based on main positive relay
Device open command is disconnected, and the negative relay 33 of the master of battery pack is based on main negative relay open command and is disconnected.Therefore, controller
30 can disconnect the positive relay 32 of master and main negative relay 33 of battery when lower case bottom is by ground materials serious impact,
To guarantee the safety of driver.
Brittle conductive material layer 20 is arranged on the bottom interior surface 10 of the shell of battery pack, wherein the shell of battery pack
Bottom outer is facing towards ground.
Fig. 2 is position schematic diagram of the brittle conductive material layer of the present invention in battery pack housing.Fig. 2 can be applied to figure
In the arrangement scene of brittle conductive material layer 20 shown in 1.
As shown in Fig. 2, the shell of battery pack accommodates battery.Wherein, housing bottom inside surface A BCD is (i.e. towards battery
Side) it is disposed with brittle conductive material layer 20 shown in FIG. 1, and housing bottom outer surface is towards ground.Inside surface A BCD and ground
Face is substantially parallel, and the battery in inside surface A BCD and shell has gap.In Fig. 2, inside surface A BCD is located at and ground
In substantially parallel YOX plane.
Fig. 3 is the exemplary schematic representation of pwm signal of the present invention.In Fig. 3, pwm signal has fixed duty cycle, and amplitude
It is 12 volts.
The above demonstration describes the specific example of pwm signal, it will be appreciated by those of skill in the art that this description is only
Be it is exemplary, be not intended to limit the present invention the protection scope of embodiment.
In fact, describing the concrete shape of brittle conductive material layer 20 by example of vertical bending line above.In fact,
Brittle conductive material layer 20 can also include other numerous embodiments.
Fig. 4 is the second demonstrative structure figure of the system of present invention detection batteries of electric automobile involucrum bulk diffusion.
As shown in figure 4, the system includes：
Brittle conductive material layer 20 is arranged on the bottom interior surface 10 of the shell of battery pack；Brittle conductive material layer 20
Include the first connector 21 and the second connector 22；The first party that brittle conductive material layer 20 intersects in the traffic direction with electric car
It is extended continuously on (for example, the direction K shown in Fig. 4 or the direction M)；
Controller 30 is separately connected with the first connector 21 and the second connector 22, wherein controller 30, the first connector 21, crisp
Property conductive material layer 20 and the second connector 22 constitute galvanic circle.Controller 30 is used to issue PWM signal to the first connector 21,
And when the pwm signal cannot be received from the second connector 22, alarm signal is issued；
Alarm unit 31, for issuing alarm based on alarm signal.
Brittle conductive material layer 20 includes brittle conductive material.Preferably, brittle conductive material layer may include in following
At least one：Electrically conductive graphite；Conductive carbon black；Conductive brass；Tin-phosphor bronze；Beryllium-bronze；Thick-film conductor material；Thin film conductive material
Material, etc..
Preferably, brittle conductive material layer includes electrically conductive graphite.It is furthermore preferred that brittle conductive material layer can be implemented and serve as reasons
The trajectory line that electrically conductive graphite is constituted.
The conductive properties of brittle conductive material guarantee along controller 30, the first connector 21,20 and of brittle conductive material layer
The galvanic circle that second connector 22 is constituted can transmit pwm signal.The brittleness attribute of brittle conductive material makes the bottom of shell
When impacting with ground materials, brittle conductive material layer 20 is easy to fracture.For example, slungshot, metal object, projection may make
Brittle conductive material layer 20 is obtained to fracture.
Brittle conductive material layer 20 is extended continuously on the direction K or the direction M that the traffic direction with electric car intersects, because
This brittle conductive material layer 20 can be with the bottom situation of good detection shell.When brittle conductive material layer 20 fractures, control
The galvanic circle that device 30, the first connector 21, brittle conductive material layer 20 and the second connector 22 processed are constituted will rupture, and lead to controller
30 are no longer able to receive pwm signal from the second connector 22.
Therefore, controller 30 may be based on whether that the PWM letter of the first connector 21 sending can be received from the second connector 22
Number and determine whether the housing bottom of battery pack occurs breakage.
Wherein, when controller 30 cannot receive the pwm signal from the second connector 22, alarm signal is issued；Work as control
When device 30 can receive the pwm signal from the second connector 22, shell normal signal is issued.
Alarm unit 31 is based on alarm signal and issues alarm, for example issues the warning notes such as acousto-optic-electric, such as in instrument
Customer's pulling over observing is prompted, and prompts further to call the shop 4S personnel maintenance far from vehicle.Moreover, alarm unit 31 is based on shell
Body normal signal issues prompt, for example shows that shell is normal in display screen.
Brittle conductive material layer 20 can be arranged in several ways on the bottom interior surface 10 of the shell of battery pack.Than
Such as, it slots on the housing bottom inner surface of battery pack, and brittle conductive material layer 20 is arranged in slot.For another example, may be used
Brittle conductive material layer 20 to be arranged on the housing bottom inner surface of the battery pack with buckle structure.
Specifically, in the battery management system (BMS) that controller 30 can be integrated or in entire car controller (VCU), also
Controller 30 can be embodied as and the independent special control circuit of BMS or VCU phase.
The above demonstration describes on the bottom interior surface 10 for the shell that brittle conductive material layer 20 is arranged in battery pack
Concrete mode is not intended to limit the present invention implementation it will be appreciated by those of skill in the art that this description is only exemplary
The protection scope of mode.
Preferably, brittle conductive material layer 20 connects on the direction K or the direction M perpendicular with the traffic direction of electric car
It renews and stretches, to be more easily detected the situation of impact of the lower case bottom by ground materials.
In Fig. 4, brittle conductive material layer 20 includes multiple class triangle bending lines being equidistantly spaced from, each class triangle
Shape bending line is of similar shape and is connected with each other.For example, being carried out by taking the leftmost class triangle bending line 211 of Fig. 1 as an example
Explanation.
Class triangle bending line 211 includes the first long side 212 and the second long side 213, wherein the first long side 212 and second is long
There is angle, the direction of the first long side 212 is the direction K, and the direction of the second long side 213 is the direction M between side 213.The direction the K side M
Intersect to vehicle traffic direction.If impact of the lower case bottom of battery pack by ground materials, the first long side 212 and
Two long sides 213, which are easy to happen, to fracture,
In one embodiment, controller 30 are also used to when that cannot receive pwm signal from the second connector 22, hair
Positive relay open command and main negative relay open command are led out；Wherein the positive relay 32 of the master of battery pack is based on main positive relay
Device open command is disconnected, and the negative relay 33 of the master of battery pack is based on main negative relay open command and is disconnected.Therefore, controller
30 can disconnect the positive relay 32 of master and main negative relay 33 of battery when lower case bottom is by ground materials serious impact,
To guarantee the safety of driver.
Brittle conductive material layer 20 is arranged on the bottom interior surface 10 of the shell of battery pack, wherein the shell of battery pack
Bottom outer is facing towards ground.
Fig. 2 is position schematic diagram of the brittle conductive material layer of the present invention in battery pack housing.Fig. 2 can be applied to figure
In the arrangement scene of brittle conductive material layer 20 shown in 4.
As shown in Fig. 2, the shell of battery pack accommodates battery.Wherein, housing bottom inside surface A BCD is (i.e. towards battery
Side) it is disposed with brittle conductive material layer shown in Fig. 4, and housing bottom outer surface is towards ground.Inside surface A BCD and ground
It is substantially parallel, and the battery in inside surface A BCD and shell has gap.In Fig. 2, inside surface A BCD is located at and ground base
In this parallel YOX plane.
Fig. 3 is the exemplary schematic representation of pwm signal of the present invention.In Fig. 3, pwm signal has fixed duty cycle, and amplitude
It is 12 volts.
The above demonstration describes the specific example of pwm signal, it will be appreciated by those of skill in the art that this description is only
Be it is exemplary, be not intended to limit the present invention the protection scope of embodiment.
Based on foregoing description, embodiment of the present invention also proposed a kind of side for detecting batteries of electric automobile involucrum bulk diffusion
Method.
Fig. 5 is the method flow diagram of present invention detection batteries of electric automobile involucrum bulk diffusion.
As shown in figure 5, this method includes：
Step 501：Brittle conductive material layer, brittle conductive material layer packet are arranged on the housing bottom inner surface of battery pack
Containing the first connector and the second connector, brittle conductive material layer is on the first direction intersected with the traffic direction of the electric car
It is extended continuously.
Step 502：Pwm signal is issued to the first connector.
Step 503：When pwm signal cannot be received from the second connector, alarm signal is issued.
Step 504：It is issued and is alarmed based on alarm signal.
In one embodiment, this method further includes：
When the pulse width modulating signal cannot be received from second connector, issues main positive relay disconnection and refer to
Order and main negative relay open command；Based on the positive relay of master that the positive relay open command of the master disconnects the battery pack,
The negative relay of master for disconnecting the battery pack based on the negative relay open command of the master.
In one embodiment, described that brittle conductive material layer packet is arranged on the housing bottom inner surface of battery pack
It includes：
Arrangement is led comprising the brittleness of multiple vertical bending lines being equidistantly spaced from the housing bottom inner surface of battery pack
Material layer, the vertical bending line includes orthogonal long side and short side, wherein the long side and the electric car
Traffic direction is perpendicular, wherein by the brittle conductive material layer arrangement in the slot on the housing bottom inner surface or with card
Buckle structure is by the brittle conductive material layer arrangement on the housing bottom inner surface of the battery pack.
Embodiment of the present invention also proposed it is a kind of distinguish detection batteries of electric automobile pack housing local losses and completely
The technical solution of damage.
Fig. 6 is the third demonstrative structure figure of the system of present invention detection batteries of electric automobile involucrum bulk diffusion.
As shown in fig. 6, the system includes：
Brittle conductive material layer 20 is arranged on the bottom interior surface 10 of the shell of battery pack；Brittle conductive material layer 20
Include the first connector 21 and the second connector 22；The first party that brittle conductive material layer 20 intersects in the traffic direction with electric car
It is extended continuously in (for example, longitudinal direction shown in FIG. 1)；
First resistor R1 is connected on brittle conductive material layer 20；
Second resistance R2；It is in parallel with first resistor R1；
Travel switch K1, first end are connect with brittle conductive material layer 20, and second end is connect with second resistance R2；Stroke is opened
The default conditions for closing K1 are to disconnect, as normally opened travel switch；It is less than in advance at a distance from battery pack when travel switch K1 is detected
When determining threshold value, closed state is converted to from normally open；
Controller 30 is separately connected with the first connector 21 and the second connector 22, wherein controller 30, the first connector 21, crisp
Property conductive material layer 20 and the second connector 22 constitute galvanic circle.Controller 30 is used to issue pulse width tune to the first connector 21
(PWM) signal is made, when pwm signal cannot be received from the second connector 22, disconnecting warning signal is issued, is connect when determining from second
When the pwm signal that head receives is identical as the duty ratio of the pwm signal issued to the first connector and amplitude is different, damage report is issued
Alert signal；
Alarm unit 31, for issuing corresponding alarm based on damage alarming and disconnecting warning signal.
When the lower case of battery is not cut open, travel switch K1 only protrude inwardly by (i.e. battery side), if protrusion
Place and battery are in contact or apart from too small, then travel switch K1 is closed.When travel switch K1 is closed state, second resistance
R2 is parallel in the galvanic circle that controller 30, the first connector 21, brittle conductive material layer 20 and the second connector 22 are constituted.
Brittle conductive material layer 20 includes brittle conductive material.Preferably, brittle conductive material layer may include in following
At least one：Electrically conductive graphite；Conductive carbon black；Conductive brass；Tin-phosphor bronze；Beryllium-bronze；Thick-film conductor material；Thin film conductive material
Material, etc..
Preferably, brittle conductive material layer includes electrically conductive graphite.It is furthermore preferred that brittle conductive material layer can be implemented and serve as reasons
The trajectory line that electrically conductive graphite is constituted.
The conductive properties of brittle conductive material guarantee along controller 30, the first connector 21,20 and of brittle conductive material layer
The galvanic circle that second connector 22 is constituted can transmit pwm signal.The brittleness attribute of brittle conductive material makes the bottom of shell
When impacting with ground materials, brittle conductive material layer 20 is easy to fracture.For example, slungshot, metal object, projection may make
Brittle conductive material layer 20 is obtained to fracture.
Brittle conductive material layer 20 is extended continuously on the first direction that the traffic direction with electric car intersects, therefore crisp
Property conductive material layer 20 can be with the bottom situation of good detection shell.When brittle conductive material layer 20 fractures, controller
30, the galvanic circle that the first connector 21, brittle conductive material layer 20 and the second connector 22 are constituted will rupture, and lead to controller 30
It is no longer able to receive pwm signal from the second connector 22.
Wherein, when the lower case bottom of battery pack and ground materials mild impulse cause travel switch K1 to be closed, control
The galvanic circle that device 30, the first connector 21, brittle conductive material layer 20 are constituted with the second connector 22 is still connected, controller 30
The pwm signal issued from the first connector 21 can be still received from the second connector 22.But due to being incorporated in galvanic circle
Second resistance R2, controller 30 are believed from the amplitude of the received pwm signal of the second connector 22 with the PWM issued to the first connector 21
Number amplitude it is different (duty ratio is identical).Therefore, controller 30 can be based on different amplitudes and the identical pwm signal of duty ratio is true
It fixs housing bottom and ground materials mild impulse and has damage (but there is no thoroughly cut), and thus issue damage report
Alert signal.At this point, controller 30 can cut off main negative relay and main positive relay, and customer is prompted to keep to the side to stop in instrument
Vehicle, and far from vehicle, the calling shop 4S personnel maintenance.Optionally, controller 30 can not cut off main negative relay and main positive relay
Device, and customer's pulling over observing is prompted in instrument, and far from vehicle, the calling shop 4S personnel maintenance.
When the lower case bottom of battery pack causes brittle conductive material layer 20 to fracture with ground materials serious impact, control
The galvanic circle that device 30, the first connector 21, brittle conductive material layer 20 and the second connector 22 processed are constituted will rupture, and lead to controller
30 are no longer able to receive pwm signal from the second connector 22.At this point, controller 30 issues disconnecting warning signal.At this point, controller
30 can cut off main negative relay and main positive relay, and customer's pulling over observing is prompted in instrument, and far from vehicle, call 4S
Shop personnel maintenance.
In one embodiment, first resistor R1 is identical as the resistance value of second resistance R2；Controller 30, for when true
The fixed pulse width modulating signal received from the second connector 22 and the pulse width modulating signal that is issued to the first connector 21
Duty ratio is identical, and the amplitude of the pulse width modulating signal received from the second connector 22 is the arteries and veins issued to the first connector 21
When rushing the half of the amplitude of bandwidth modulation signals, damage alarming signal is issued.
Herein, by setting identical for the resistance value of first resistor R1 and second resistance R2, can simply based on from
Whether the amplitude for the pulse width modulating signal that the second connector 22 receives, which halves, determines whether to issue damage alarming signal.
Alarm unit 31 is based on disconnecting warning signal and damage alarming signal issues corresponding alarm, for example issues acousto-optic-electric
Equal warning notes, for example customer's pulling over observing is prompted in instrument, and prompt far from vehicle.Moreover, alarm unit 31 is based on shell
Body normal signal issues prompt, for example shows that shell is normal in display screen.
Brittle conductive material layer 20 can be arranged in several ways on the bottom interior surface 10 of the shell of battery pack.Than
Such as, it slots on the housing bottom inner surface of battery pack, and brittle conductive material layer 20 is arranged in slot.For another example, may be used
Brittle conductive material layer 20 to be arranged on the housing bottom inner surface of the battery pack with buckle structure.
Specifically, controller 30 can be integrated into battery management system (BMS) or in entire car controller (VCU), also
Controller 30 can be embodied as and the independent special control circuit of BMS or VCU phase.
The above demonstration describes on the bottom interior surface 10 for the shell that brittle conductive material layer 20 is arranged in battery pack
Concrete mode is not intended to limit the present invention implementation it will be appreciated by those of skill in the art that this description is only exemplary
The protection scope of mode.
Preferably, brittle conductive material layer 20 continuously prolongs on the first direction perpendicular with the traffic direction of electric car
It stretches, to be more easily detected the situation of impact of the lower case bottom by ground materials.
In Fig. 6, brittle conductive material layer 20 includes multiple vertical bending lines being equidistantly spaced from, each vertical bending line
It is of similar shape and is connected with each other.For example, being illustrated by taking the leftmost vertical bending line 211 of Fig. 6 as an example.
Vertical bending line 211 includes the first long side 212, the second long side 213 and short side 214, wherein the first long side 212 and the
Two long sides 213 are parallel to each other, and the first long side 212 and the second long side 213 are mutually perpendicular to short side 214, and the first long side 212
It is perpendicular with the second long side 213 and the traffic direction of electric car.
Therefore, when electric car is run, if impact of the lower case bottom of battery pack by ground materials, first is long
Side 212 and the second long side 213 are easy to happen and fracture.
Preferably, the number of travel switch is multiple, and each travel switch is connected with corresponding vertical bending line.Than
Such as, in Fig. 6, travel switch is 5, respectively K1, K2, K3, K4 and K5.Travel switch K1, K2, K3, K4 and K5 and respectively
Vertical bending line it is corresponding and connect.By arranging multiple travel switches and being staggeredly arranged in physical space, it is ensured that
Detect the damage of shell any position.
In one embodiment, controller 30 are also used to when that cannot receive pwm signal from the second connector 22, hair
Positive relay open command and main negative relay open command are led out；Wherein the positive relay 32 of the master of battery pack is based on main positive relay
Device open command is disconnected, and the negative relay 33 of the master of battery pack is based on main negative relay open command and is disconnected.Therefore, controller
30 can disconnect the positive relay 32 of master and main negative relay 33 of battery when lower case bottom is by ground materials serious impact,
To guarantee the safety of driver.
Brittle conductive material layer 20 is arranged on the bottom interior surface 10 of the shell of battery pack, wherein the shell of battery pack
Bottom outer is facing towards ground.
Fig. 2 is position schematic diagram of the brittle conductive material layer of the present invention in battery pack housing.Fig. 2 can be applied to figure
In the arrangement scene of brittle conductive material layer 20 shown in 6.
As shown in Fig. 2, the shell of battery pack accommodates battery.Wherein, housing bottom inside surface A BCD is (i.e. towards battery
Side) it is disposed with brittle conductive material layer 20 shown in FIG. 1, and housing bottom outer surface is towards ground.Inside surface A BCD and ground
Face is substantially parallel, and the battery in inside surface A BCD and shell has gap.In Fig. 2, inside surface A BCD is located at and ground
In substantially parallel YOX plane.
Fig. 7 is the variation schematic diagram of pulse width modulating signal of the present invention, wherein first resistor R1 and second resistance R2
Resistance value is identical.In Fig. 7, the pwm signal that controller issues has fixed duty cycle, and amplitude is 12 volts；Work as controller
When the duty ratio of received pwm signal is constant and amplitude is 6 volts, it can be assumed that slight impact occurs.
Fig. 8 is the exemplary flow chart of present invention detection batteries of electric automobile involucrum bulk diffusion.
As shown in figure 8, this method includes：
Step 801：Brittle conductive material layer, the brittle conductive material are arranged on the housing bottom inner surface of battery pack
Layer includes the first connector and the second connector, and the brittle conductive material layer is in the intersected with the traffic direction of the electric car
It is extended continuously on one direction.
Step 802：It connects on the brittle conductive material layer first resistor, second electricity in parallel with the first resistor
Resistance, and arranges travel switch, and the first end of the travel switch is connect with the brittle conductive material layer, second end and described the
The connection of two resistance；Wherein when the travel switch, which is detected, is less than predetermined threshold at a distance from the battery pack, from normally opened
State is converted to closed state.
Step 803：Pulse width modulating signal is issued to first connector.
Step 804：When the pulse width modulating signal cannot be received from second connector, disconnecting warning is issued
Signal, when the pulse width tune for determining the pulse width modulating signal received from second connector with being issued to the first connector
When the duty ratio of signal processed is identical and amplitude is different, damage alarming signal is issued.
In one embodiment, this method further includes：
When the pulse width modulating signal cannot be received from second connector, issues main positive relay disconnection and refer to
Order and main negative relay open command；
Based on the positive relay of master that the positive relay open command of the master disconnects the battery pack, it is based on the negative relay of the master
Device open command disconnects the negative relay of master of the battery pack.
In one embodiment, described that brittle conductive material layer packet is arranged on the housing bottom inner surface of battery pack
It includes：Arrangement includes the brittle conductive material of multiple vertical bending lines being equidistantly spaced from the housing bottom inner surface of battery pack
Layer, the vertical bending line includes orthogonal long side and short side, wherein the operation side of the long side and the electric car
To perpendicular, wherein by the brittle conductive material layer arrangement in the slot on the housing bottom inner surface or with buckle structure
By the brittle conductive material layer arrangement on the housing bottom inner surface of the battery pack；The arrangement travel switch includes：
Arrange multiple travel switches, and each travel switch is connected with corresponding vertical bending line.
In conclusion the system of embodiment of the present invention includes：Brittle conductive material layer is arranged in the shell bottom of battery pack
It is continuous on the first direction that the traffic direction with electric car intersects comprising the first connector and the second connector on portion's inner surface
Extend；First resistor is connected on brittle conductive material layer；Second resistance；It is in parallel with first resistor；Travel switch, first end
It is connect with brittle conductive material layer, second end is connect with second resistance, is less than predetermined threshold at a distance from battery pack when detecting
When value, closed state is converted to from normally open；Controller, for issuing pwm signal to the first connector, when cannot be connect from second
When head receives pwm signal, disconnecting warning signal is issued, is sent out when determining from the received pwm signal of the second connector with to the first connector
When the duty ratio of pwm signal out is identical and amplitude is different, damage alarming signal is issued.As it can be seen that the present invention can detecte battery
Packet is damaged completely and Local Damaged.
Moreover, the present invention, which can detecte battery pack, is damaged situation, and driver is issued prompt in time.In addition, of the invention
The brittle conductive material layer of embodiment has numerous embodiments, can be with flexible Application.Especially, when brittle conductive material layer
Comprising multiple vertical bending lines being equidistantly spaced from, vertical bending line includes orthogonal long side and short side, wherein long side with
When the traffic direction of electric car is perpendicular, flexible fault detection can be provided.
Can by embodiment of the present invention proposes detection batteries of electric automobile involucrum bulk diffusion system be applied to it is various new
In energy automobile, such as mixed power electric car (HEV), pure electric automobile (BEV), fuel cell electric vehicle (FCEV)
With other new energy (such as supercapacitor, flywheel high-efficiency energy storage vehicle) automobiles etc..
Herein, " schematic " expression " serving as examplea, instances, or illustrations " should not will be described herein as " showing
Any diagram, the embodiment of meaning property " are construed to technical solution that is a kind of preferred or more having advantages.To make simplified form,
Part related to the present invention is only schematically shown in each figure, and does not represent its practical structures as product.Separately
Outside, so that simplified form is easy to understand, with the component of identical structure or function in some figures, it is only symbolically depicted
In one, or only marked one of those.Herein, "one" is not offered as limiting the quantity of relevant portion of the present invention
It is made as " only this ", and "one" situation for not indicating to exclude the quantity " more than one " of relevant portion of the present invention.At this
Wen Zhong, "upper", "lower", "front", "rear", "left", "right", "inner", "outside" etc. are only used for indicating the opposite position between relevant portion
Set relationship, and the absolute position of these non-limiting relevant portions.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope that is bright, and being not intended to limit the invention, it is all without departing from equivalent embodiments made by technical spirit of the present invention or
Change, such as the combination, segmentation or repetition of feature, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of system for detecting batteries of electric automobile involucrum bulk diffusion, which is characterized in that the system includes：
Brittle conductive material layer is arranged on the housing bottom inner surface of battery pack；The brittle conductive material layer includes first
Connector and the second connector；The brittle conductive material layer connects on the first direction intersected with the traffic direction of the electric car
It renews and stretches；
Controller is separately connected with first connector and the second connector, for issuing pulse width tune to first connector
Signal processed, and when the pulse width modulating signal cannot be received from second connector, issue alarm signal；
Alarm unit, for issuing alarm based on the alarm signal.
2. the system of detection batteries of electric automobile involucrum bulk diffusion according to claim 1, which is characterized in that the battery
There is slot, the brittle conductive material layer arrangement is in the slot on the housing bottom inner surface of packet.
3. the system of detection batteries of electric automobile involucrum bulk diffusion according to claim 1, which is characterized in that the brittleness
Conductive material layer is arranged on the housing bottom inner surface of the battery pack with buckle structure.
4. the system of detection batteries of electric automobile involucrum bulk diffusion according to claim 1, which is characterized in that the brittleness
Conductive material layer includes multiple vertical bending lines being equidistantly spaced from, and the vertical bending line includes orthogonal long side and short
Side, wherein the long side and the traffic direction of the electric car are perpendicular.
5. the system of detection batteries of electric automobile involucrum bulk diffusion according to claim 1, which is characterized in that the brittleness
Conductive material layer includes at least one of following：
Electrically conductive graphite；Conductive carbon black；Conductive brass；Tin-phosphor bronze；Beryllium-bronze；Thick-film conductor material；Thin film of conductive material.
6. the system of detection batteries of electric automobile involucrum bulk diffusion according to claim 1, which is characterized in that brittle conductive
Material layer is extended continuously on the first direction perpendicular with the traffic direction of the electric car.
7. the system of detection batteries of electric automobile involucrum bulk diffusion according to claim 1, which is characterized in that
The controller is also used to when that cannot receive the pulse width modulating signal from second connector, issues master
Positive relay open command and main negative relay open command；
Wherein the positive relay of the master of the battery pack is disconnected based on the positive relay open command of the master, the master of the battery pack
Negative relay is based on the negative relay open command of the master and is disconnected.
8. a kind of method for detecting batteries of electric automobile involucrum bulk diffusion, which is characterized in that this method includes：
Arrange that brittle conductive material layer, the brittle conductive material layer connect comprising first on the housing bottom inner surface of battery pack
Head and the second connector, the brittle conductive material layer are continuous on the first direction intersected with the traffic direction of the electric car
Extend；
Pulse width modulating signal is issued to first connector；
When the pulse width modulating signal cannot be received from second connector, alarm signal is issued；
It is issued and is alarmed based on the alarm signal.
9. the method for detection batteries of electric automobile involucrum bulk diffusion according to claim 8, which is characterized in that this method is also
Including：
When the pulse width modulating signal cannot be received from second connector, issue main positive relay open command and
Main negative relay open command；
It is disconnected based on the negative relay of the master based on the positive relay of master that the positive relay open command of the master disconnects the battery pack
Open the negative relay of master that instruction disconnects the battery pack.
10. the method for detection batteries of electric automobile involucrum bulk diffusion according to claim 8, which is characterized in that
It is described to arrange that brittle conductive material layer includes on the housing bottom inner surface of battery pack：
Arrangement includes the brittle conductive material of multiple vertical bending lines being equidistantly spaced from the housing bottom inner surface of battery pack
The bed of material, the vertical bending line includes orthogonal long side and short side, wherein the operation of the long side and the electric car
Direction is perpendicular, wherein by the brittle conductive material layer arrangement in the slot on the housing bottom inner surface or to buckle knot
Structure is by the brittle conductive material layer arrangement on the housing bottom inner surface of the battery pack.
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| CN201810522829.6A CN108845263A (en) | 2018-05-28 | 2018-05-28 | A kind of system and method detecting batteries of electric automobile involucrum bulk diffusion |
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| CN201810522829.6A CN108845263A (en) | 2018-05-28 | 2018-05-28 | A kind of system and method detecting batteries of electric automobile involucrum bulk diffusion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802623A (en) * | 2018-05-28 | 2018-11-13 | 北京长城华冠汽车科技股份有限公司 | A kind of system and method for detection batteries of electric automobile involucrum bulk diffusion |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100211570B1 (en) * | 1995-12-20 | 1999-08-02 | 양재신 | Automatic power shut-off system for an automobile |
| KR100224426B1 (en) * | 1996-12-31 | 1999-10-15 | 정몽규 | Detecting equipment of fracture of plate spring of a car |
| CN202676820U (en) * | 2012-05-29 | 2013-01-16 | 浙江吉利汽车研究院有限公司杭州分公司 | Collision detection device for electric automobile power battery pack |
| CN203101511U (en) * | 2012-12-17 | 2013-07-31 | 天津力神电池股份有限公司 | Testing device for testing polymer lithium ion battery case resistance |
| CN204323022U (en) * | 2014-11-17 | 2015-05-13 | 比亚迪股份有限公司 | Crash sensor, collision detecting device, collision protection structure and battery-driven car |
| CN205080221U (en) * | 2015-10-27 | 2016-03-09 | 广东亿能电力工程有限公司 | Cable inspector |
| CN106910956A (en) * | 2017-04-06 | 2017-06-30 | 深圳市沃特玛电池有限公司 | One kind detection warning device |
-
2018
- 2018-05-28 CN CN201810522829.6A patent/CN108845263A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100211570B1 (en) * | 1995-12-20 | 1999-08-02 | 양재신 | Automatic power shut-off system for an automobile |
| KR100224426B1 (en) * | 1996-12-31 | 1999-10-15 | 정몽규 | Detecting equipment of fracture of plate spring of a car |
| CN202676820U (en) * | 2012-05-29 | 2013-01-16 | 浙江吉利汽车研究院有限公司杭州分公司 | Collision detection device for electric automobile power battery pack |
| CN203101511U (en) * | 2012-12-17 | 2013-07-31 | 天津力神电池股份有限公司 | Testing device for testing polymer lithium ion battery case resistance |
| CN204323022U (en) * | 2014-11-17 | 2015-05-13 | 比亚迪股份有限公司 | Crash sensor, collision detecting device, collision protection structure and battery-driven car |
| CN205080221U (en) * | 2015-10-27 | 2016-03-09 | 广东亿能电力工程有限公司 | Cable inspector |
| CN106910956A (en) * | 2017-04-06 | 2017-06-30 | 深圳市沃特玛电池有限公司 | One kind detection warning device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802623A (en) * | 2018-05-28 | 2018-11-13 | 北京长城华冠汽车科技股份有限公司 | A kind of system and method for detection batteries of electric automobile involucrum bulk diffusion |
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