CN205595403U - Encapsulation battery with interior short circuit function - Google Patents
Encapsulation battery with interior short circuit function Download PDFInfo
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- CN205595403U CN205595403U CN201620167352.0U CN201620167352U CN205595403U CN 205595403 U CN205595403 U CN 205595403U CN 201620167352 U CN201620167352 U CN 201620167352U CN 205595403 U CN205595403 U CN 205595403U
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model provides an encapsulation battery with interior short circuit function, it includes a casing, a lid, interior short circuit analog circuit and two battery cell. The casing has an accommodating space and an opening. The lid includes an apron, two utmost point ears, two utmost point posts, two the utmost point ear with two utmost point posts set up the both sides at the apron in the interval respectively relatively. Two battery cell parallelly connected and accept in among the accommodating space of casing. Interior short circuit analog circuit includes a switch, a constant ohmic resistance, and wire. Constant ohmic resistance pass through wire and switch and two utmost point ear electricity are connected. The constant ohmic resistance centre gripping set up in between two battery cell.
Description
Technical field
This utility model belongs to cell art, is specifically related to a kind of battery packaging structure.
Background technology
Under the energy scarcity dual-pressure with environmental pollution, the extensively application of new forms of energy has become as irreversible science and technology
Development trend.Automobile dynamic system motorized has been increasingly becoming the major trend of future automobile technology development.Automobile dynamic system
Even if one of principal character of motorized electric energy replaces chemical energy as the main driving energy source of vehicle.The storage of electric energy
Need certain carrier, i.e. electrochemical energy storage system.Lithium-ion-power cell energy density is high, has extended cycle life, has become as
One of the main selection in electric powered motor source.
But, along with the gradually popularization of electric automobile, occur during the safety hazards of lithium-ion-power cell.Lithium ion moves
Power battery accident be usually expressed as the temperature with thermal runaway as core rise sharply, smolder, the phenomenon such as even blast on fire.Relevant thing
Therefore threaten the security of the lives and property of the people, hinder the extensive industrialization of electric automobile.
Lithium-ion-power cell thermal runaway accident may be caused by multiple inducement, and accident investigation finds, in recent years, due to dynamic
The example of the thermal runaway accident that power battery internal short-circuit causes increases the most year by year.In electrokinetic cell manufacture process, it is internal possible
It is mixed into impurity, it is also possible to there is fault of construction (as stress concentrates the cracking that causes, or the fold etc. that causes of prestressing force).Dynamic
During power battery uses, the electrochemical potentials of inside battery is affected by its internal impurity and fault of construction, causes this
A little defective positions electrochemical potentials abnormal distribution.Abnormal Potential distribution meeting inducing metal dendrite is (such as Li dendrite, ferrum branch
Crystalline substance, copper dendrite etc.) in the growth of abnormal position.The growth of dendrite can finally puncture barrier film, causes the generation of battery internal short-circuit.
Electrokinetic cell use during, internal short-circuit from produces to ultimately cause electrokinetic cell thermal runaway needs little through counting one by one
Time time.During a few hours that this internal short-circuit occurs and develops, it is necessary to the generation of internal short-circuit detected in time and judge
The degree of internal short-circuit, carries out early warning ahead of time, to ensure the security of the lives and property of passenger.I.e. need reliable and effective internal short-circuit
Detection algorithm in early days, to carry out early warning for internal short-circuit.
Once developing internal short-circuit detection algorithm in early days, its actual effect and reliability are accomplished by testing.Now, need
One electrokinetic cell with internal short-circuit is set in set of cells, and under actually used working condition, internal short-circuit is triggered,
Just can be effectively tested actual effect and the reliability of internal short-circuit detection algorithm.But, at present for the concrete origin cause of formation of internal short-circuit
Being not already being fully apparent from, very difficult acquisition in use there occurs the battery of internal short-circuit.Usually, only there is it in accident
After, could find that electrokinetic cell there occurs internal short-circuit by accident investigation.Even if having developed internal short-circuit detection algorithm in early days, also
Cannot be estimated for the actual effect of this kind of algorithm and reliability.
Therefore, contrived experiment device, with the behavior of quantitative simulation electrokinetic cell internal short-circuit, is calculated for assessment internal short-circuit detection
The reliability of method is highly desirable to.At present, contrived experiment device quantitative simulation electrokinetic cell internal short-circuit includes the side that three classes are main
Method: 1) rupture cause internal short-circuit by mechanical presses or puncture initiation battery diaphragm；2) between battery plus-negative plate, impurity is introduced
Granule, carries out extruding at correspondence position and causes internal short-circuit；3) at inside battery built-in controllable material (such as paraffin, memorial alloy
Deng), use specific trigger condition (such as intensification etc.) to activate controllable material, controllable material attribute change is (such as melted paraffin wax, note
Recall alloy deformation etc.) cause battery plus-negative plate short circuit, thus simulate internal short-circuit.
In terms of assessment algorithm reliability, the method for three above analoglike internal short-circuits all has certain disadvantages.
Method 1) destruction of battery structure can be caused, and under practical situation, actually used during battery internal short-circuit seldom due to electricity
Pool structure destroys and occurs.It addition, method 1) internal short-circuit that causes is unstable, may directly contribute the thermal runaway of battery, and not
Internal short-circuit in early days can be simulated, it is impossible to for the checking of internal short-circuit detection algorithm.Method 1) repeatability be not fine, it is impossible to
Ensure to cause stable quantitative internal short-circuit every time.
Method 2) cell deformation can be caused equally, can not the preferably internal short-circuit under simulating actual conditions.Method 2) make
The internal short-circuit become is the most unstable, may directly contribute the thermal runaway of battery.Further, when introducing impurity particle, impurity particle micro-
Sight pattern is difficult to control to, it is impossible to ensures the repeatability of internal short-circuit, can not obtain quantitative internal short-circuit the most in various degree.
Method 3) do not result in cell deformation, but, built-in controllable material needs certain condition to be triggered, as heated up
Melted paraffin, or heat up excite memorial alloy to deform.Temperature-rise period itself changes the normal working temperature of battery, Ke Nengzao
Become the generation of other side reactions of inside battery, have impact on electrochemistry and the heat production characteristic of battery.Method 3) introduced controlled material
Expect that the microscopic appearance between battery plus-negative plate is difficult to determine with microcosmic effect relation, still can not be effectively short in fixing quantity
The degree on road, it is impossible to ensure the repeatability of internal short-circuit.
Utility model content
In view of this, it is necessary to propose a kind of encapsulation battery with internal short-circuit function, can in experimentation quantitatively
Simulation electrokinetic cell internal short-circuit, internal short-circuit effect stability, favorable repeatability.
A kind of encapsulation battery with internal short-circuit function, it include a housing, a lid, an internal short-circuit analog circuit and
At least two cell.Described housing has a receiving space and an opening.Described lid include a cover plate, two
Lug, two poles, said two lug and said two pole are respectively separated the both sides being oppositely arranged on cover plate.Described at least
Two cells are in parallel and are contained in the receiving space of described housing.Described internal short-circuit analog circuit includes a switch,
One fixed value resistance, and wire.Described fixed value resistance is electrically connected with said two lug by wire and switch.Described fixed
The clamping of value resistance is arranged between described at least two cell.
Described receiving space is used for housing described fixed value resistance and said two pole.
The area of described opening is identical with the area of described cover plate.
Said two lug electrically connects with said two pole respectively.
One end of described fixed value resistance by wire with described switch electrically connect after again with in said two lug
Electrical connection, the other end of described fixed value resistance is directly electrically connected with another in said two lug by wire.
After described switch Guan Bi, described fixed value resistance and said two lug electric connection.
Described fixed value resistance is fixed in described receiving space.
Described fixed value resistance is fixed on the central authorities of described receiving space.
Described receiving space for two battery cells in parallel of storage, described fixed value resistance be held on these two in parallel
Between battery cell.
Described housing is that metal material is made.
The encapsulating structure of the electrokinetic cell internal short-circuit simulation that the utility model proposes, can receive two batteries as required
Monomer thus constitute and there is the encapsulation battery of internal short-circuit function, can be with quantitative simulation electrokinetic cell in internal short-circuit feelings in various degree
Electrochemical effect under condition and heat effect, it is achieved that with experimental simulation electrokinetic cell under the conditions of internal short-circuit, voltage and temperature
Situation of change.When the encapsulating structure of this electrokinetic cell internal short-circuit simulation is applied to analog, the mould that internal short-circuit is triggered
Plan is controlled, can simulate in practical situations both, the internal short-circuit situation of inside battery burst.Meanwhile, this analog output
Voltage, temperature results can be that exploitation internal short-circuit in early days detection algorithm provides data, the internal short-circuit developed for checking is early
The validity and reliability of phase detection algorithm.
Accompanying drawing explanation
The schematic diagram of the encapsulating structure of the electrokinetic cell internal short-circuit simulation that Fig. 1 provides for this utility model embodiment.
The envelope with internal short-circuit function encapsulated by the encapsulating structure in Fig. 1 that Fig. 2 provides for this utility model embodiment
Packed battery.
The encapsulation battery described in the use that Fig. 3 provides for this utility model embodiment with internal short-circuit function carries out internal short-circuit
The flow chart of simulation.
The encapsulation battery described in the use that Fig. 4 provides for this utility model embodiment with internal short-circuit function carries out internal short-circuit
In simulation process, the placement location of temperature sensor.
Fig. 5 is in this utility model embodiment, uses the electric current of 1/3C, has internal short-circuit merit for having different resistance
The encapsulation battery of energy is charged the result of test.
Fig. 6 is in this utility model embodiment, uses the electric current of 1/3C, has internal short-circuit merit for having different resistance
The encapsulation battery of energy carries out the knot of discharge test.
Fig. 7 is in this utility model embodiment, uses FUDS operating mode, for having the envelope of internal short-circuit function without internal short-circuit
Packed battery carries out the result of discharge test.
Fig. 8 is in this utility model embodiment, uses FUDS operating mode, has internal short-circuit merit for having 2.5 Ω resistances
The encapsulation battery of energy carries out the result of discharge test, and wherein internal short-circuit triggers when test starts.
Fig. 9 is in this utility model embodiment, uses FUDS operating mode, has internal short-circuit function for having 2.5 Ω resistances
Encapsulation battery carry out the result of discharge test, wherein internal short-circuit triggers suddenly in test process.
The encapsulation battery described in the use that Figure 10 provides for this utility model embodiment with internal short-circuit function forms battery
Group carries out the flow chart of set of cells internal short-circuit simulation.
Figure 11 be containing described in there is the schematic diagram of set of cells of encapsulation battery of internal short-circuit function.
The encapsulation battery described in the use that Figure 12 provides for embodiment of the present utility model with internal short-circuit function forms electricity
Pond group carries out in set of cells internal short-circuit simulation process, the placement location of temperature sensor.
Figure 13 is in this utility model embodiment, uses the electric current that certain vehicle actual condition extracts, for the electricity of 5 joint series connection
Pond group carries out the experimental result discharged.
Figure 14 is in this utility model embodiment, uses the electric current that certain vehicle actual condition extracts, for the electricity of 5 joint series connection
Pond group carries out the experimental result discharged, and wherein battery 100 has the internal short-circuit of 0.5 Ω, and internal short-circuit triggers when 2619s.
Figure 15 is in this utility model embodiment, when battery 100 has 0.5 Ω internal short-circuit, and battery short circuit point and lug temperature
Degree situation.
Figure 16 is in this utility model embodiment, uses the electric current that certain vehicle actual condition extracts, for the electricity of 5 joint series connection
Pond group carries out the experimental result discharged, and the wherein said encapsulation battery with internal short-circuit function has the internal short-circuit of 0.2 Ω, interior short
Road is triggered when 1155s.
Figure 17 is in this utility model embodiment, described in there is the encapsulation battery of internal short-circuit function there is 0.2 Ω internal short-circuit
Time, battery short circuit point and lug temperature conditions.
Main element symbol description
| Lid | 10 |
| Lug | 12 |
| Cover plate | 14 |
| Pole | 16 |
| Cell | 20 |
| Internal short-circuit analog circuit | 30 |
| Switch | 32 |
| Wire | 34 |
| Fixed value resistance | 36 |
| Housing | 40 |
| Opening | 42 |
| Receiving space | 44 |
| The encapsulating structure of electrokinetic cell internal short-circuit simulation | 60 |
| There is the encapsulation battery of internal short-circuit function | 100 |
| Normal battery monomer | 401～404 |
| Set of cells | 500 |
| Battery electrode column connects sheet | 601 |
Following detailed description of the invention will further illustrate this utility model in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings.Below by
The embodiment being described with reference to the drawings is exemplary, it is intended to be used for explaining this utility model, and it is not intended that new to this practicality
The restriction of type.
Referring to Fig. 1 and Fig. 2, this utility model embodiment provides the encapsulating structure of a kind of electrokinetic cell internal short-circuit simulation
60, it includes that it includes lid 10, housing 40, internal short-circuit analog circuit 30.Described housing 40 is in one end open
Hollow structure is used for accommodating described internal short-circuit analog circuit 30 and at least two cell 20, and described lid 10 covers to be opened at this
On mouth thus form encapsulating structure.
The hollow cavity structure that described housing 40 is one end open accommodates and internal short-circuit analog circuit described in mechanical constraint
30 and described at least two cell 20, it has opening 42 and a receiving space 44.The shape of this housing 40 is not
Limit, when can apply according to reality, the shape of the cell 20 of set of cells designs.In this utility model embodiment, described housing
40 is the cuboid of a hollow.The material that this housing 40 preferably employs hard heat-resisting is made, it is further preferable that described housing 40
Material can be that the metal material that hard is heat-resisting is made, such as steel or aluminum.In this utility model embodiment, described housing 40 is steel
Shell.
Described lid 10 includes a cover plate 14, and this cover plate 14 has relative first surface and a second surface, described
One surface is away from the opening of described housing 40, and described second surface is near the opening of described housing 40.The shape of this cover plate 14 can
Make according to the actual needs.Preferably, this cover plate 14 is lamellar.This cover plate 14 can be by insulant, it is possible to by metal material
Material is made.In the present embodiment, this cover plate 14 is aluminum alloy materials.
Described lid 10 farther includes two poles 16 and two lugs 12, and said two pole 16 is spaced and relatively sets
Putting the first surface at described cover plate 14, said two lug 12 interval is oppositely arranged on the second surface of described cover plate 14.Institute
State two poles 16 to electrically connect with said two lug 12 respectively.In the present embodiment, said two pole 16 includes that interval is arranged
Positive Poles and negative pole pole.Said two lug 12 includes spaced positive pole ear and negative lug.Described
Positive pole ear and negative lug are respectively provided with two ends, and described Positive Poles electrically connects with one end of described positive pole ear, described
The other end of positive pole ear electrically connects with the positive terminal of described set of cells, and described negative pole pole is electric with one end of described negative lug
Connecting, the other end of described negative lug is connected with the negative pole end of described set of cells.Said two pole 16, said two lug
12 all insulate with described cover plate 14.Said two pole 16, the material of said two lug 12 are conductive material.Described cover plate
14, said two pole 16 and said two lug 12 can be structure as a whole.In the present embodiment, said two pole 16,
Said two lug 12 is laminated structure, is made up of metallic copper.
Described internal short-circuit analog circuit 30 includes a switch 32, wire 34, and determines certain value resistance 36.Described definite value electricity
One end of resistance 36 is electrically connected with in said two lug 12 after being electrically connected with described switch 32 by wire 34 again, described
The other end of fixed value resistance 36 is directly electrically connected with another in said two lug 12 by wire 34.Described fixed value resistance
In 36 receiving spaces 44 being arranged on described housing 40, the central authorities of described receiving space 44 can be arranged on, by this receiving space
44 divide equally.The position of described switch 32 and described wire 34 does not limits, as long as electric connection and control circuit Guan Bi disconnection can be realized
Function.During use, can be relatively encapsulated in described receiving space 44 by least two cell 20, these are at least two years old
Described fixed value resistance 36 is folded between this at least two cell 20 by individual cell 20.Said two lug 12 should
Two cells 20 are connected in parallel, and described housing 40 and described lid 10 are by described at least two cell 20 envelope
Dress up an enclosed construction, thus obtain an encapsulation battery 100 with internal short-circuit function.Described at least two cell 20
In parallel.When needs quantitative simulation internal short-circuit, being closed by switch 32, the conducting of described internal short-circuit analog circuit 30 forms one and discharges back
Road.The electricity of this encapsulation battery 100 with internal short-circuit function discharges on described fixed value resistance 36, and this has internal short-circuit function
Encapsulation battery 100 voltage reduce, simultaneously at this fixed value resistance 36 due to have electric current by and significantly generate heat.By above-mentioned side
Method, simulates electrochemical effect and the heat effect of this internal internal short-circuit of encapsulation battery 100 with internal short-circuit function.
When reality is applied, described fixed value resistance 36 can choose the resistance of different resistance.Described electrokinetic cell internal short-circuit
The encapsulating structure 60 of simulation can be with the electrochemical effect of quantitative simulation internal short-circuit in various degree and heat effect.It addition, it is short in simulation
The described internal short-circuit analog circuit 30 on road can be controlled by described switch 32.Therefore simulate during the triggering of internal short-circuit controlled
, i.e. can simulate the internal short-circuit situation of burst.It addition, described fixed value resistance 36 can be placed on described in there is internal short-circuit function
The internal two joint cells 20 of encapsulation battery 100 between any position, such that it is able to the electrokinetic cell of simulation diverse location
Internal short-circuit.
Refer to Fig. 3, be given further below described in there is encapsulation the using and the side of test of battery 100 of internal short-circuit function
Method, it specifically includes following steps:
S1, it is provided that the encapsulating structure 60 of described electrokinetic cell internal short-circuit simulation, and said two cell 20, and seal
There is described in dress formation the encapsulation battery 100 of internal short-circuit function；
S2, choose the fixed value resistance 36 of different resistance, uses given electric current operating mode to have internal short-circuit function for described
Encapsulation battery 100 carries out internal short-circuit test；And
S3, monitors and analyzes the voltage in internal short-circuit test, the measurement result of temperature, calculates for the detection in early days of exploitation internal short-circuit
Method provides data support.
In above-mentioned steps S1, in the present embodiment, described cell 20 is the Soft Roll lithium ion with laminated aluminum film
Electrokinetic cell.The positive electrode active materials of this cell 20 is nickel-cobalt-manganese ternary material, and negative active core-shell material is graphite.Monomer electricity
The capacity in pond 20 is 12.5Ah.There is provided two materials and the identical cell of geometry 20 to be connected in parallel, press
Being assembled into total capacity according to accompanying drawing 2 is to have the encapsulation battery 100 of internal short-circuit function described in 25Ah.
In above-mentioned steps S2, the described encapsulation battery 100 with internal short-circuit function can be put into the constant temperature of temperature-controllable
In control chamber, use battery charging and discharging equipment, set certain electric current operating mode, described in making, there is internal short-circuit function
Encapsulation battery 100 carry out internal short-circuit test.As shown in Figure 3, in test process, in addition to record cell output voltage V, also
X-shaped mark can place temperature sensor in figure 4, in record test process, temperature TC of inside batteryInAnd battery
Temperature TC on surfaceOutward。
During step S2, the present embodiment have chosen the fixed value resistance 36 of different resistance, employs different discharge and recharges
Operating mode encapsulates the characteristic of battery 100 and has carried out substantial amounts of experiment and survey for having internal short-circuit function described in of the present utility model
Examination.The test specifically carried out is as shown in table 1:
Table 1 has internal short-circuit function and encapsulates, for described, the series of tests experiment that battery 100 carries out
Refer to accompanying drawing 5, in this utility model embodiment, use the electric current of 1/3C, determine for having different resistance
The encapsulation battery 100 described in value resistance 36 with internal short-circuit function is charged the result of test.It can be seen that in battery
In the case of portion is not short-circuited, battery charge capacity is 25.4Ah, and in the case of inside battery is short-circuited, battery
Charging capacity will be greater than 25.4Ah.This explanation internal short-circuit consumes certain battery electric quantity in charging process so that battery
Charging interval extends.For when 1 Ω internal short-circuit, charging capacity reaches 41.7Ah, adds than without internal short-circuit situation
64%.This is the result that obviously internal short-circuit causes.Internal short-circuit resistance is the least, and short circuit current is the biggest, and degree of short circuit is the tightest
Weight, the time of charging is the longest.From charging curve, the charging curve of battery substantially reduces, and this is that obvious internal short-circuit is made
The electrochemical effect become.From temperature curve, internal short-circuit resistance is the least, and short circuit current is the biggest, and short dot heat production is the biggest.In nothing
In the case of internal short-circuit occurs, the maximum temperature rise in charging process is only 1.6oC；And for when 1 Ω internal short-circuit,
Big charging temperature rise can reach 7.4oC.This is the calorigenic effect that obviously internal short-circuit causes.
Refer to accompanying drawing 6, in this utility model embodiment, use the electric current of 1/3C, determine for having different resistance
The encapsulation battery 100 described in value resistance 36 with internal short-circuit function is charged the result of test.It can be seen that in battery
In the case of portion is not short-circuited, discharge capacity of the cell is 25.4Ah, and in the case of inside battery is short-circuited, battery
Discharge capacity will be less than 25.4Ah.This explanation internal short-circuit consumes certain battery electric quantity in charging process so that battery
Discharge time shortens.For when 1 Ω internal short-circuit, discharge capacity is only 20.7Ah, reduces than the situation without internal short-circuit
18.5%.This is the result that obvious internal short-circuit causes.Internal short-circuit resistance is the least, and short circuit current is the biggest, and degree of short circuit is the tightest
Weight, discharge time is the shortest.From discharge curve, the discharge curve of battery is on the low side, and this is the electrochemistry effect that internal short-circuit causes
Should.From temperature curve, internal short-circuit resistance is the least, and short circuit current is the biggest, and short dot heat production is the biggest.Occur without internal short-circuit
In the case of, the maximum temperature rise in discharge process is only 0.4oC；And for when 1 Ω internal short-circuit, maximum electric discharge temperature rise can
To reach 9.1oC.This is the calorigenic effect that obviously internal short-circuit causes.
Comprehensive accompanying drawing 5 and Fig. 6's as a result, it is possible to have the encapsulation of internal short-circuit function described in proving to the utility model proposes
Battery 100 can be with quantitative simulation electrokinetic cell internal short-circuit in various degree.
Refer to accompanying drawing 7, in this utility model embodiment, use FUDS operating mode, for without described in internal short-circuit situation
Have internal short-circuit function encapsulates the result that battery 100 carries out testing.It can be seen that discharged in the FUDS operating mode being repeated
Cheng Zhong, the time that battery can discharge is longer than 25000 seconds, and inside battery maximum temperature is about 26.5oC, hot face temperature is about
It is 25.6oC。
Refer to accompanying drawing 8, in this utility model embodiment, use FUDS operating mode, for having the definite value of different resistance
The encapsulation battery 10 described in resistance 36 with internal short-circuit function carries out the result of discharge test, and internal short-circuit touches when test starts
Send out.It can be seen that in the FUDS operating mode discharge process being repeated, the time that battery can discharge is only 22180 seconds, less than nothing
The discharge time of internal short-circuit, this is the result caused due to battery internal short-circuit.Meanwhile, during FUDS operating mode is carried out, 2.5
In the case of Ω internal short-circuit, inside battery maximum temperature can reach 38oC, and hot face temperature is also close to 29oC.In battery
Portion's maximum temperature and hot face temperature are all higher than the situation in accompanying drawing 6 without internal short-circuit.
Refer to accompanying drawing 9, in this utility model embodiment, use FUDS operating mode, for having the definite value of different resistance
The encapsulation battery 100 described in resistance 36 with internal short-circuit function carries out the result of discharge test, and internal short-circuit is in test process
Suddenly trigger.At the test initial stage, being not turned on internal short-circuit switch, i.e. there is not internal short-circuit in inside battery.Internal temperature of battery is
A height of 26.2oC, surface temperature is up to 25.6oSituation without internal short-circuit in C, with accompanying drawing 6 is close.7312s is proceeded in test
Near, internal short-circuit switch Guan Bi, there is the internal short-circuit of 2.5 Ω triggered suddenly in inside battery.After internal short-circuit triggers suddenly, electricity
Pond internal temperature rises to 38oC, surface temperature rises to 28.2oC, this is close with the result in accompanying drawing 8.Comprehensive accompanying drawing 7, accompanying drawing
8, accompanying drawing 9 as a result, it is possible to explanation, the utility model proposes described in there is the encapsulation battery 100 of internal short-circuit function can be real
The most controlled function.
Sum up in above-mentioned narration, the charge/discharge capacity in each test result, and maximum temperature rise, it is summarized in table 2:
Table 2 internal short-circuit series of tests key results collects
Quantitative test data provided in table 2 are that battery management system exploitation internal short-circuit detection algorithm in early days provides
Important foundation.Can according to the experimental result in table 2, and utilize this utility model proposed described in there is internal short-circuit merit
The encapsulation battery 100 of energy provides the decision criteria of the internal short-circuit internal short-circuit of detection algorithm detection in early days.This practicality can also be used
There is described in novel proposition the encapsulation battery of internal short-circuit function, choose certain internal short-circuit resistance, apply certain electric current work
Condition, verifies the validity and reliability of developed internal short-circuit detection algorithm in early days.
Refer to Figure 10, described in there is the encapsulation battery 100 of internal short-circuit function can be arranged on as a battery cell
In one set of cells, if thus test situation when having a battery cell internal short-circuit in this set of cells further, it specifically wraps
Include following steps:
S1, it is provided that the encapsulating structure 60 of described electrokinetic cell internal short-circuit simulation, and said two cell 20, and seal
There is described in dress formation the encapsulation battery 100 of internal short-circuit function；
S2, will have encapsulation battery 100 and normal battery monomer series-connected composition one set of cells 500 of internal short-circuit function；
S3, chooses the fixed value resistance 36 of resistance, uses given electric current operating mode, and described set of cells 500 is carried out internal short-circuit survey
Examination；And
S4, monitors and analyzes the voltage in internal short-circuit test, the measurement result of temperature, calculates for the detection in early days of exploitation internal short-circuit
Method provides data support.
In step sl, in the present embodiment, described cell 20 is the lithium-ion-power cell with aluminum hull packaging.Should
The positive electrode active materials of cell 20 is nickel-cobalt-manganese ternary material, and negative active core-shell material is graphite.The appearance of this cell 20
Amount is 41Ah.Specifically, it is provided that two materials and the identical described cell 20 of geometry are connected in parallel, and press
Being assembled into total capacity according to accompanying drawing 2 is to have the encapsulation battery 100 of internal short-circuit function described in 25Ah.
In step s 2, have chosen the fixed value resistance 36 of different resistance, employ different discharge and recharge operating modes for comprising
The characteristic of encapsulation battery 100 set of cells 500 with internal short-circuit function of the present utility model has carried out experiment test.The present embodiment
In, described encapsulation the battery 100 and 4 joint normal battery monomer 401 ~ 404 with internal short-circuit function is composed in series such as accompanying drawing 11
Shown set of cells 500, the position of the wherein said encapsulation battery 100 with internal short-circuit function can be with remaining 4 batteries list
The location swap of body 401 ~ 404.The described encapsulation battery 100 with internal short-circuit function and described normal battery monomer 401 ~
Connect sheet 601 by pole between 404 to link together.
In step s3, use battery charging and discharging equipment, set certain electric current operating mode, described set of cells 500 is entered
Row charge-discharge test.As shown in Figure 12, in test process, in addition to record cell output voltage V, it is also possible in accompanying drawing 12
X-shaped mark places temperature sensor, in record test process, and temperature TC of inside batteryInAnd the temperature of battery electrode column
TCPole.In experimentation, the Guan Bi of described switch 32 is utilized to simulate described with the conducting of described internal short-circuit analog circuit 30
There is the internal short-circuit of the encapsulation battery 100 of internal short-circuit function.The triggering of internal short-circuit can occur at any time at the time point set.
In above-mentioned steps S4, the described set of cells 500 for assembling uses certain vehicle actual operating mode to carry out
Charge-discharge test.In the case of internal short-circuit in set of cells does not triggers, the battery testing curve obtained is as shown in Figure 13.
Total discharge time of test is 11660s, TC in set of cellsPoleMaximum temperature be 32oC。
Looking at accompanying drawing 14, the set of cells 500 for assembling uses certain vehicle actual operating mode to carry out charge and discharge electrical measurement
Examination.The internal short-circuit resistance of the described encapsulation battery 100 with internal short-circuit function is chosen for 0.5 Ω.It can be seen that 0.5 Ω's is interior
Short circuit triggers when 2619s, battery electrode column TCPoleTemperature is up to 38oC.There is the encapsulation battery 100 of internal short-circuit function
Voltage declines the most extremely, and first reaches blanking voltage, causes be only 9832s the discharge time of whole set of cells, does not i.e. have
In the case of internal short-circuit 84.3%.
Look at accompanying drawing 15, after 0.5 Ω internal short-circuit triggers, short dot TCInTemperature can be up to 95oC, this is
Than relatively hazardous situation.And measure pole temperature TC obtainedPoleTemperature the highest can reach 38oC, i.e. actual battery management
The temperature value that systematic survey obtains.TCPoleMeasure the temperature value obtained also to make a farfetched comparison in Fig. 5 without having exceeded 6 in the case of internal short-circuitoC,
Show internal short-circuit battery and there is the temperature of abnormal increase.
Looking at accompanying drawing 16, the set of cells 500 for assembling uses certain vehicle actual operating mode to carry out charge and discharge electrical measurement
Examination.The internal short-circuit resistance of the described encapsulation battery 100 with internal short-circuit function is chosen for 0.2 Ω.It can be seen that 0.2 Ω's is interior
Short circuit triggers when 1155s, battery electrode column TCPoleTemperature is up to 52oC.The described encapsulation battery with internal short-circuit function
The voltage of 100 declines the most extremely, and first reaches blanking voltage, causes be only 7630s, i.e. the discharge time of whole set of cells
There is no 65.4% in the case of internal short-circuit.
Look at accompanying drawing 17, after 0.2 Ω internal short-circuit triggers, short dot TCInTemperature can be up to 154oC, this
It is than relatively hazardous situation.And measure pole temperature TC obtainedPoleTemperature the highest can reach 52oC, i.e. actual battery pipe
The temperature value that reason systematic survey obtains.TCPoleMeasure the temperature value obtained also to make a farfetched comparison in Fig. 5 without exceeding in the case of internal short-circuit
20oC, shows short circuit battery and has the temperature of abnormal increase.
Quantitative test data provided in accompanying drawing 13 ~ accompanying drawing 17 are battery management system exploitation internal short-circuit detection in early days
Algorithm provides important foundation.Can the experimental result in 13 ~ accompanying drawing 17 with reference to the accompanying drawings, and utilize this utility model to be carried
A kind of encapsulation battery with internal short-circuit function gone out detects the decision criteria of internal short-circuit to provide internal short-circuit detection algorithm in early days.
A kind of encapsulation battery with internal short-circuit function that the utility model proposes can also be used, choose certain internal short-circuit resistance,
Apply certain electric current operating mode, verify the validity and reliability of developed internal short-circuit detection algorithm in early days.
In sum, the utility model proposes the encapsulating structure of a kind of electrokinetic cell internal short-circuit simulation, this structure is permissible
Thering is provided a kind of cell package scheme, the Chip-R in the given resistance of inside battery insertion obtains the envelope with internal short-circuit function
Packed battery, thus the generation of quantitative simulation electrokinetic cell internal short-circuit.The internal resistance inserted does not affects the electrochemistry of battery itself
Performance, it is possible to preferably during short-circuit within simulated battery, battery electrochemical effect and heat effect, can be with experimental simulation electricity
Cell voltage and the situation of change of temperature.Simultaneously as resistance is fixed, can observe in various degree in the case of internal short-circuit quantitatively,
The voltage of battery and the situation of change of temperature.The method favorable repeatability, only needs Push switch can conveniently trigger internal short-circuit.From
And can assess in various degree in the case of internal short-circuit quantitatively, the degree of danger of battery, it is also possible to be used for developing internal short-circuit detection
Algorithm, and the effectiveness of qualitative assessment internal short-circuit detection algorithm.Assessment battery internal short-circuit detection algorithm in early days is had by the program
Important meaning, it will help improve the reliability of electrokinetic cell safety management, reduces the generation of electrokinetic cell safety hazards.
It addition, those skilled in the art can also do other changes in this utility model spirit, these are according to this practicality
The change that novel spirit is done, all should be included in the scope that this utility model is claimed.
Claims (10)
1. having an encapsulation battery for internal short-circuit function, it includes a housing, a lid, an internal short-circuit analog circuit and extremely
Few two cells, described housing has a receiving space and an opening, and described lid includes a cover plate, two poles
Ear, two poles, said two lug and said two pole are respectively separated the both sides being oppositely arranged on cover plate, described internal short-circuit
Analog circuit includes a switch, a fixed value resistance, and wire, and described fixed value resistance is by wire and switchs with described
The electrical connection of two lugs, described at least two cell is in parallel and is contained in the receiving space of described housing, described definite value
Resistance clamping is arranged between described at least two cell.
There is the encapsulation battery of internal short-circuit function the most as claimed in claim 1, it is characterised in that described receiving space is used for receiving
Hold described fixed value resistance and said two pole.
There is the encapsulation battery of internal short-circuit function the most as claimed in claim 2, it is characterised in that the area of described opening and institute
The area stating cover plate is identical.
There is the encapsulation battery of internal short-circuit function the most as claimed in claim 1, it is characterised in that said two lug respectively with
Said two pole electrically connects.
There is the encapsulation battery of internal short-circuit function the most as claimed in claim 4, it is characterised in that one end of described fixed value resistance
Electrically connect with in said two lug again after being electrically connected with described switch by wire, the other end of described fixed value resistance
Directly electrically connected with another in said two lug by wire.
There is the encapsulation battery of internal short-circuit function the most as claimed in claim 5, it is characterised in that after described switch Guan Bi, institute
State fixed value resistance and said two lug electric connection.
There is the encapsulation battery of internal short-circuit function the most as claimed in claim 1, it is characterised in that described fixed value resistance is fixed on
In described receiving space.
There is the encapsulation battery of internal short-circuit function the most as claimed in claim 7, it is characterised in that described fixed value resistance is fixed on
The central authorities of described receiving space.
There is the encapsulation battery of internal short-circuit function the most as claimed in claim 7, it is characterised in that described receiving space is used for receiving
Receiving two battery cells in parallel, described fixed value resistance is held between these two battery cells in parallel.
There is the encapsulation battery of internal short-circuit function the most as claimed in claim 1, it is characterised in that described housing is metal material
Material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620167352.0U CN205595403U (en) | 2016-03-04 | 2016-03-04 | Encapsulation battery with interior short circuit function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620167352.0U CN205595403U (en) | 2016-03-04 | 2016-03-04 | Encapsulation battery with interior short circuit function |
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|---|---|
| CN205595403U true CN205595403U (en) | 2016-09-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633489A (en) * | 2016-03-04 | 2016-06-01 | 清华大学 | Package structure for internal short-circuit simulation of power battery |
| CN105826511A (en) * | 2016-03-04 | 2016-08-03 | 清华大学 | Packaged battery with internal short circuit function |
| CN110764014A (en) * | 2018-07-26 | 2020-02-07 | 东莞新能德科技有限公司 | Method and device for detecting short circuit in battery, terminal and readable storage medium |
-
2016
- 2016-03-04 CN CN201620167352.0U patent/CN205595403U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633489A (en) * | 2016-03-04 | 2016-06-01 | 清华大学 | Package structure for internal short-circuit simulation of power battery |
| CN105826511A (en) * | 2016-03-04 | 2016-08-03 | 清华大学 | Packaged battery with internal short circuit function |
| CN105633489B (en) * | 2016-03-04 | 2018-08-03 | 清华大学 | The encapsulating structure of power battery internal short-circuit simulation |
| CN110764014A (en) * | 2018-07-26 | 2020-02-07 | 东莞新能德科技有限公司 | Method and device for detecting short circuit in battery, terminal and readable storage medium |
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