CN206505970U - A kind of thermal runaway early detection system for power car electrokinetic cell - Google Patents
A kind of thermal runaway early detection system for power car electrokinetic cell Download PDFInfo
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- CN206505970U CN206505970U CN201720141822.0U CN201720141822U CN206505970U CN 206505970 U CN206505970 U CN 206505970U CN 201720141822 U CN201720141822 U CN 201720141822U CN 206505970 U CN206505970 U CN 206505970U
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- battery core
- strain gage
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
A kind of thermal runaway early detection system for power car electrokinetic cell of the utility model, including battery core group to be measured, resistance strain gage group, power supply, battery system acquisition module, carload instrument and car networking platform；The battery core group to be measured includes several battery cores to be measured, the resistance strain gage group includes several resistance strain gages, resistance strain gage is fixed on the battery core shell of battery core to be measured, and the resistance strain gage changes self-resistance value according to the deformation values of battery core shell correspondence；The battery system acquisition module includes electrical resistance collection module；The electrical resistance collection module gathers resistance strain gage resistance by rigid line；The electrical resistance collection module is by the foil gauge resistance after detection by vehicle CAN communication network delivery to carload instrument；The carload instrument shows corresponding informance according to foil gauge resistance, and sends corresponding alarm and instruction.The generation of power car thermal runaway phenomenon can be effectively protected using the system.
Description
Technical field
The utility model is related to power car electrokinetic cell thermal runaway protection technology field, more particularly to a kind of for power
The thermal runaway early detection system of car electrokinetic cell.
Background technology
Electric vehicle has obtained significant progress as a kind of vehicles of energy-conserving and environment-protective in this century.Due to electronic
The driving voltage for the power section that vehicle is used is most of all in more than 36VDC, the up to 500VDC having, considerably beyond safety
The rank of voltage, therefore, the dynamical system of electric vehicle need the requirement to the power and energy of electrokinetic cell also abnormal harsh.
And it is a progressive process that thermal runaway, which occurs, for electrokinetic cell, increase with the service life of battery core, internal lithium metal
Dendrite is grown into, and increases the degree of battery core internal short-circuit, and battery core improper use such as overcharges, crosses and put, in the case of external short circuit, heating
Phenomenon will be apparent from.Particularly indivedual battery cores are because production technology problem, and battery core has flaw, when such as battery core is produced, pole piece
The phenomenon such as water suction, electrolyte is unqualified, dust is not up to standard, pole piece out-of-flatness, battery core thermal runaway may not occur using early stage
Phenomenon, but the service life later stage of battery core, internal lithium metal dendrite are easier in growth, charge and discharge process, and battery core heating is existing
As stronger, it is easier to electrolyte vaporization, battery core swelling phenomenon occur.When battery core occurs without charge and discharge phenomena, with electricity
Stream reduces, and the spontaneous thermal phenomenon of battery core weakens, and electrolyte vaporization weakens, and battery core swelling phenomenon will disappear or weaken.But it is now electric
Core safety coefficient is very low, in high current charge-discharge, electrolyte vaporization aggravation, and battery core shell is bursting at the collision, battery core thermal runaway risk
It will increased dramatically.When thermal runaway occurs for indivedual battery cores, will ignite battery core nearby, and then cause whole battery case burning, explode,
Life, property safety to passenger threaten.
Because battery core is arranged on inside battery case, user can not directly observe battery core cosmetic variation, and hot mistake does not occur for battery core
Before control, battery core voltage will not be drastically reduced, and battery Control management system can not also be detected.Therefore, the utility model is carried
Go out a kind of scheme, for preventing battery system to occur the scheme of thermal runaway.
In a kind of explosion-proof lithium battery casees of CN201510808168-, the patent is only pointed out to employ Deformation Detection device, and does not have
Which kind of have specific to object mode to be detected and be applicable the detection mode using.And this programme is primarily adapted for use in aluminum hull packaging
Battery core, battery core case surface paste resistance strain gage, when battery core occur swelling phenomenon when, battery core shell will be stretched, resistance
Foil gauge is deformed therewith, and resistance strain gage resistance changes, the resistance that BMS is collected according to acquisition module, judges that battery core is
No generation flatulence, is gathered by being repeated several times, and the indivedual battery cores of reminding passengers have had failure risk, and then notify vehicle factory to change
Battery core, or scrapped to battery, with ensure passenger, vehicle safety.
Utility model content
To solve the above-mentioned technical problem that gives warning in advance for being unable to reach thermal runaway, the utility model provides a kind of judgement effect
A kind of thermal runaway early detection system machine for power car electrokinetic cell that is really good, can giving warning in advance：
A kind of thermal runaway early detection system for power car electrokinetic cell, including battery core group to be measured, resistance-strain
Piece group, power supply, battery system acquisition module, carload instrument and car networking platform；It is to be measured that the battery core group to be measured includes several
Battery core, the resistance strain gage group includes several resistance strain gages, and each resistance strain gage is fixed on each battery core to be measured
Battery core shell, the resistance strain gage changes self-resistance value according to the deformation values of battery core shell correspondence；The battery system
Acquisition module of uniting includes electrical resistance collection module；The electrical resistance collection module gathers resistance strain gage resistance by rigid line；The electricity
Resistance acquisition module is by the foil gauge resistance after detection by vehicle CAN communication network delivery to carload instrument；The carload instrument
Corresponding informance is shown according to foil gauge resistance, and sends corresponding alarm and instruction.
As a further improvement, the resistance strain gage includes flexible substrates and resistance-strain sensing unit；The resistance
Strain sensing unit includes first electrode, second electrode and resistance-strain sensing layer；The resistance strain gage is adopted with the resistance
Connected between collection module by first electrode and second electrode；The resistance-strain sensing layer changes according to the size of its deformation quantity
Change the resistance value of itself.
As a further improvement, when the resistance of the resistance-strain sensing layer exceedes first threshold or Second Threshold；Institute
The fault message of carload instrument display correspondence threshold range is stated, corresponding alarm is sent and instructs, wherein, the Second Threshold is more than
The first threshold.
As a further improvement, the carload instrument is connected by vehicle CAN communication network with the car networking platform
For notifying relevant enterprise to repair problem vehicle.
As a further improvement, the power supply is connected with the battery system acquisition module, its magnitude of voltage be 12V or
24V。
Compared with prior art, the utility model has advantages below：
1st, a kind of thermal runaway early detection system and its control method for power car electrokinetic cell of the utility model,
Under normal usage, thermal runaway early stage occurs for battery core, there are multiple periodic battery core bulging phenomenons, using resistance-strain
Piece measures bulging phenomenon, can have failure risk with advance notice passenger, the battery core.
2nd, a kind of thermal runaway early detection system and its control method for power car electrokinetic cell of the utility model,
Under extreme service condition, such as overcharge, cross put, short circuit, before battery core voltage dips, battery core significantly bulging, the program can
Thermal runaway will occur for advance notice passenger, the battery core, and by battery Control management system, in advance broken height pressure, prevent or
Person slows down the generation of thermal runaway.
Brief description of the drawings
Accompanying drawing 1 is that a kind of system of thermal runaway early detection system for power car electrokinetic cell of the utility model is shown
It is intended to；
Embodiment
, it is necessary to which explanation, term " first ", " second " are only used for describing purpose in description of the present utility model, and
It is not intended that indicating or implying relative importance." being connected ", " connection " should be interpreted broadly, for example, it may be fixed connect
Connect or be detachably connected, or be integrally connected；Can be mechanical connection or electrical connection；It can be direct phase
Even, it can also be indirectly connected to by intermediary, can be the connection of two element internals.For the ordinary skill people of this area
For member, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.In addition, being retouched of the present utility model
In stating, unless otherwise indicated, " multiple " are meant that two or more.
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is a part of embodiment of the present utility model, rather than whole embodiments.Based on the reality in the utility model
Apply example, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.The utility model is made with embodiment below in conjunction with the accompanying drawings further to retouch in detail
State.
It refer in Fig. 1, embodiment, a kind of thermal runaway early detection system for power car electrokinetic cell, including
Battery core group 10 to be measured, resistance strain gage group 20, power supply 30, battery system acquisition module 40, carload instrument 50 and car networking platform
60；The battery core group 10 to be measured includes several battery cores 11 to be measured, and the resistance strain gage group 20 includes several resistance-strains
Piece 21, each resistance strain gage 21 is fixed on the battery core shell of each battery core to be measured 11, and the resistance strain gage 21 is according to described
The deformation values correspondence of battery core shell changes self-resistance value；The battery system acquisition module 40 includes electrical resistance collection module 41,
The battery system acquisition module 40 still further comprises battery core temperature collect module, voltage acquisition module etc., and other gather moulds
Block；The electrical resistance collection module 41 gathers the resistance of resistance strain gage 21 by rigid line；After the electrical resistance collection module 41 will be detected
Foil gauge resistance by vehicle CAN communication network delivery to carload instrument 50；The carload instrument 50 is according to foil gauge resistance
Corresponding informance is shown, and sends corresponding alarm and instruction.Electrical resistance collection module 41 can effectively be passed through using such system
Real-time monitoring, the generation for the thermal runaway phenomenon that effectively gives warning in advance are taken battery core to be measured with resistance strain gage 21.
It refer in Fig. 1, embodiment, the resistance strain gage 21 includes flexible substrates and resistance-strain sensing unit；Institute
Stating resistance-strain sensing unit includes first electrode, second electrode and resistance-strain sensing layer；The resistance strain gage with it is described
Connected between electrical resistance collection module by first electrode and second electrode；The resistance-strain sensing layer is according to the big of its deformation quantity
It is small to change the resistance value of itself.Specifically, the original length for defining the battery core surface to be measured is that resistance-strain sensing is single
The original length on first surface is L1, it is resistance-strain sensing unit surface drum to define the length after the battery core surface to be measured bulging
Length after swollen is L2, the deformation values for defining the battery core surface to be measured are that the deformation values on resistance-strain sensing unit surface are △
L, wherein △ L=L2-L1；The resistance-strain sensing layer changes corresponding resistance-strain sheet resistance values, tool according to △ L size
Body, by national regulations, general resistance strain gage resistance R is 60,120,200,350,500,1000 Ω.The strain sheet resistance
Changing value calculation formula：△ R/R=K ε
Wherein,
R：Foil gauge original resistance value Ω (ohm)
ΔR：Elongation or the caused resistance variations Ω (ohm) of compression
K：The sensitivity coefficient of foil gauge (constant is provided by the manufacturer of foil gauge)
ε：Strain, general foil gauge range is that within 20,000 microstrains, (L is that battery core pastes foil gauge surface to ε=△ L/L
Length)
Then to sum up, final increased resistance value Δ R can be calculated by above-mentioned parameter.When the resistance-strain sensing layer
When resistance exceedes first threshold or Second Threshold；The fault message of the display of the carload instrument 50 correspondence threshold range, sends phase
It should alarm and instruct, wherein, the Second Threshold is more than the first threshold.Can essence by above-mentioned computational methods and control method
Increased resistance value is really calculated to send corresponding alarm and instruction according to increased resistance value.Specifically, when described at least one
The resistance of individual resistance strain gage 21 exceed first threshold and less than Second Threshold when and continue a scheduled time, the carload instrument
50 send the slight bulging alarm of battery core, and send reduction driving power instruction.When the resistance of at least one resistance strain gage 21
It is worth when exceeding Second Threshold and predetermined hold-time, the carload instrument 50 sends the alarm of thermal runaway early stage, and sends cut-out height
Pressure output and parking checking instruction.The scope of the scheduled time is 5s~15s, it is preferred that the scheduled time is 10s.
It refer to Fig. 1, the carload instrument 50 is connected use by vehicle CAN communication network with the car networking platform 60
Problem vehicle is repaired in notifying relevant enterprise；The power supply 30 is connected with the battery system acquisition module 40, its
Magnitude of voltage is 12V or 24V.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements done etc. should be included in the utility model
Within the scope of protection.
Claims (5)
1. a kind of thermal runaway early detection system for power car electrokinetic cell, it is characterised in that：Including battery core group to be measured,
Resistance strain gage group, power supply, battery system acquisition module, carload instrument and car networking platform；If the battery core group to be measured includes
Dry battery core to be measured, the resistance strain gage group includes several resistance strain gages, and each resistance strain gage is fixed on each treat
The battery core shell of battery core is surveyed, the resistance strain gage changes self-resistance value according to the deformation values of battery core shell correspondence；Institute
Stating battery system acquisition module includes electrical resistance collection module；The electrical resistance collection module gathers resistance strain gage by rigid line and hindered
Value；The electrical resistance collection module is by the foil gauge resistance after detection by vehicle CAN communication network delivery to carload instrument；It is described
Carload instrument shows corresponding informance according to foil gauge resistance, and sends corresponding alarm and instruction.
2. a kind of thermal runaway early detection system for power car electrokinetic cell according to claim 1, its feature
It is：The resistance strain gage includes flexible substrates and resistance-strain sensing unit；The resistance-strain sensing unit includes the
One electrode, second electrode and resistance-strain sensing layer；Pass through first between the resistance strain gage and the electrical resistance collection module
Electrode and second electrode connection；The resistance-strain sensing layer changes the resistance value of itself according to the size of its deformation quantity.
3. a kind of thermal runaway early detection system for power car electrokinetic cell according to claim 2, its feature
It is：When the resistance of the resistance-strain sensing layer exceedes first threshold or Second Threshold；The carload instrument display correspondence
The fault message of threshold range, sends corresponding alarm and instructs, wherein, the Second Threshold is more than the first threshold.
4. a kind of thermal runaway early detection system for power car electrokinetic cell according to claim 1, its feature
It is：The carload instrument is connected for notifying relevant enterprise pair by vehicle CAN communication network with the car networking platform
Problem vehicle is repaired.
5. a kind of thermal runaway early detection system for power car electrokinetic cell according to claim 1, its feature
It is：The power supply is connected with the battery system acquisition module, and its magnitude of voltage is 12V or 24V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720141822.0U CN206505970U (en) | 2017-02-17 | 2017-02-17 | A kind of thermal runaway early detection system for power car electrokinetic cell |
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| CN201720141822.0U CN206505970U (en) | 2017-02-17 | 2017-02-17 | A kind of thermal runaway early detection system for power car electrokinetic cell |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068959A (en) * | 2017-02-17 | 2017-08-18 | 厦门金龙旅行车有限公司 | A kind of thermal runaway early detection system and its control method for power car electrokinetic cell |
| CN108226693A (en) * | 2017-12-18 | 2018-06-29 | 清华大学 | Method and apparatus for detecting short circuit in battery in real time, and computer-readable storage medium |
| CN110308403A (en) * | 2019-07-03 | 2019-10-08 | 中国民用航空飞行学院 | The detection of power lithium-ion battery multi-parameter and acquisition method |
| CN111913115A (en) * | 2020-07-30 | 2020-11-10 | 广州小鹏汽车科技有限公司 | Thermal runaway triggering method of battery and battery testing system |
| CN111929597A (en) * | 2020-07-16 | 2020-11-13 | 中国汽车技术研究中心有限公司 | Battery resistance testing method and device in battery thermal runaway process |
| CN113517477A (en) * | 2021-03-04 | 2021-10-19 | 淮安骏盛新能源科技有限公司 | Auxiliary monitoring method and alarm device for thermal runaway of power battery in battery pack |
| CN117855641A (en) * | 2024-03-05 | 2024-04-09 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
-
2017
- 2017-02-17 CN CN201720141822.0U patent/CN206505970U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068959A (en) * | 2017-02-17 | 2017-08-18 | 厦门金龙旅行车有限公司 | A kind of thermal runaway early detection system and its control method for power car electrokinetic cell |
| CN108226693A (en) * | 2017-12-18 | 2018-06-29 | 清华大学 | Method and apparatus for detecting short circuit in battery in real time, and computer-readable storage medium |
| CN108226693B (en) * | 2017-12-18 | 2020-02-07 | 清华大学 | Method and apparatus for detecting short circuit in battery in real time, and computer-readable storage medium |
| CN110308403A (en) * | 2019-07-03 | 2019-10-08 | 中国民用航空飞行学院 | The detection of power lithium-ion battery multi-parameter and acquisition method |
| CN111929597A (en) * | 2020-07-16 | 2020-11-13 | 中国汽车技术研究中心有限公司 | Battery resistance testing method and device in battery thermal runaway process |
| CN111929597B (en) * | 2020-07-16 | 2022-06-17 | 中国汽车技术研究中心有限公司 | Method and device for testing battery resistance in battery thermal runaway process |
| CN111913115A (en) * | 2020-07-30 | 2020-11-10 | 广州小鹏汽车科技有限公司 | Thermal runaway triggering method of battery and battery testing system |
| CN111913115B (en) * | 2020-07-30 | 2023-06-30 | 广州小鹏汽车科技有限公司 | Thermal runaway triggering method of battery and battery testing system |
| CN113517477A (en) * | 2021-03-04 | 2021-10-19 | 淮安骏盛新能源科技有限公司 | Auxiliary monitoring method and alarm device for thermal runaway of power battery in battery pack |
| CN117855641A (en) * | 2024-03-05 | 2024-04-09 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
| CN117855641B (en) * | 2024-03-05 | 2024-05-28 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
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