CN103904381B - Internal temperature of battery measurement apparatus - Google Patents
Internal temperature of battery measurement apparatus Download PDFInfo
- Publication number
- CN103904381B CN103904381B CN201410082645.4A CN201410082645A CN103904381B CN 103904381 B CN103904381 B CN 103904381B CN 201410082645 A CN201410082645 A CN 201410082645A CN 103904381 B CN103904381 B CN 103904381B
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- Prior art keywords
- battery
- cell
- internal temperature
- measurement apparatus
- temperature
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to a kind of internal temperature of battery measurement apparatus, including the first encapsulating housing, and the battery pack being arranged on inside first encapsulating housing, the battery pack includes at least two cells, at least two cell is stacked, each cell includes battery core and the second encapsulating housing, the battery core is encapsulated wherein by second encapsulating housing, wherein, the internal temperature of battery measurement apparatus further include an at least temperature sensor, an at least temperature sensor is arranged between at least two cell, and clamped by least two cell.
Description
Technical field
The present invention relates to a kind of device of measurement internal temperature of battery, more particularly to one kind is when can measure battery thermal runaway
The device of internal temperature.
Background technology
Under dual-pressure of the energy crisis with environmental pollution, automobile dynamic system motorized is increasingly becoming future automobile
Technology Developing mainstream.Even if one of principal character of automobile dynamic system motorized electric energy replaces chemical energy as main energy
Amount supply source.Lithium ion battery, because of the advantage in terms of its energy density and cycle life, is the master in electric powered motor source
One of select.
Lithium-ion battery monomer meets the driven by power of electric automobile and requires by constituting battery pack.Usually, in list
In body battery grouping procedure, the high voltage for obtaining that driven by power needs of being connected by cell；Obtained by cell parallel connection
Obtain the high current that driven by power needs.In cell parallel process, the battery that jumbo cell is needed when in parallel
Quantity is few.The reduction of number of batteries in battery pack can improve the reliability of battery pack, reduce the cost during battery management,
Receive the favor of many cell stack designs personnel.
However, the safety hazards of lithium ion battery occasionally have generation, current safety Design method is still it cannot be guaranteed that lithium
The security of ion battery.Safety issue will threaten the security of the lives and property of the people, and hinder the big of electric automobile
Scale industrialization.Low capacity lithium ion battery it is in parallel in groups when, the number of batteries of needs is more, and the probability for breaking down is higher.
Although high capacity lithium ion battery it is in parallel in groups when, the number of batteries of needs is less, and the probability for breaking down is less, greatly
There are other safety issues in the Group Design of capacity lithium ion battery.
High capacity lithium ion battery size is relative to be increased, and the radiating condition of inside battery is deteriorated and temperature distributing disproportionation is even.
The too high safety hazards that may cause lithium ion battery of local temperature.As radiating condition is limited, internal temperature of battery one
As be higher than outside batteries temperature.Result of study discovery at present, under lithium ion battery normal operating conditions, inside lithium ion cell
10 are generally below with external temperature differenceoC, and under the conditions of lithium ion battery thermal runaway, inside battery and external temperature difference
600 will likely be reachedoC or more.Only judge that battery thermal runaway situation is irrational with outside batteries temperature.
Furthermore, it is to improve battery security design, needs to assess the harm that battery thermal runaway is caused.It is generally believed that battery
The energy discharged when security incident occurs is bigger, and the harm being likely to result in is bigger.The energy of battery release is typically by battery
Mean temperature reflects.For high capacity lithium ion battery, when thermal runaway occurs, outside batteries temperature is far below battery
Mean temperature.
Therefore, measure internal temperature of battery necessary.At present, measuring internal temperature of battery has some schemes.Such as lead to
Cross the various sensors for being capable of measurement temperature are implanted into measure internal temperature of battery in inside battery.The temperature of inside battery implantation
Sensor will affect the chemical property of battery.The transmission of ion is hindered with the sensor that electrolyte is mixed, is shown
Writing affects the cycle life of battery.
The content of the invention
In view of this, it is necessory to providing when one kind can accurately monitor battery thermal runaway internal temperature and not affecting electrification
Learn the internal temperature of battery measurement apparatus of performance.
A kind of internal temperature of battery measurement apparatus, including the first encapsulating housing, and be arranged in first encapsulating housing
The battery pack in portion, the battery pack include at least two cells, and at least two cell is stacked, each list
Body battery includes battery core and the second encapsulating housing, and the battery core is encapsulated wherein by second encapsulating housing, wherein, the battery
Inside temperature measurement device further includes an at least temperature sensor, and an at least temperature sensor is arranged on described at least two
Between individual cell, and clamped by least two cell.
Internal temperature of battery measurement apparatus provided in an embodiment of the present invention, temperature sensor is clamped in described at least two
Itself has between the cell of encapsulating structure, then the clamping is made up of the cell of the temperature sensor again
Battery unit package can't affect while internal temperature of battery the cell so as to measure in another encapsulating structure
Chemical property.Further, since the temperature sensor is clamped between two cells, so as to the temperature sensor can
To measure internal temperature of each cell after thermal runaway by the two section accurate simulations of cells, especially can be with
Inside maximum temperature of the cell after thermal runaway is measured accurately, so as to can subsequently be monomer electricity in electrokinetic cell
The design of the security and stability of pond group is provided and is effectively instructed.
Description of the drawings
Fig. 1 is the structural representation of internal temperature of battery measurement apparatus provided in an embodiment of the present invention.
When Fig. 2 is the monitoring thermal runaway using the internal temperature of battery measurement apparatus provided in an embodiment of the present invention in battery
The flow chart of the method for portion's temperature.
Fig. 3 is lost in heat using internal temperature of battery measurement apparatus measurement mesuring battary for provided in an embodiment of the present invention
The contrast curve of inside and outside temperature before and after control.
Main element symbol description
| Internal temperature of battery measurement apparatus | 100 |
| First encapsulating housing | 10 |
| Top cover | 10a |
| Matrix | 102a |
| Pole | 104a |
| Lug | 106a |
| Drain pan | 10b |
| Cell | 20 |
| Temperature sensor | 30 |
Following specific embodiment will further illustrate the present invention with reference to above-mentioned accompanying drawing.
Specific embodiment
Internal temperature of battery measurement apparatus provided in an embodiment of the present invention are described in detail below with reference to accompanying drawing.
Fig. 1 is referred to, the embodiment of the present invention provides a kind of internal temperature of battery measurement apparatus 100, the internal temperature of battery
Measurement apparatus 100 include the first encapsulating housing 10, and the battery pack being encapsulated in first encapsulating housing 10, the battery pack bag
Include at least two cells 20, at least two cell is stacked, each cell 20 include battery core with
And second encapsulating housing（It is not shown）, second encapsulating housing by the battery core encapsulate wherein, wherein, the internal temperature of battery
Measurement apparatus 100 further include an at least temperature sensor 30, and an at least temperature sensor 30 is arranged on described at least two
Clamp between individual cell 20 and by least two cell 20.
First encapsulating housing 10 can be a hollow seal casinghousing, for accommodating and encapsulating the battery pack.It is excellent
Selection of land, when the battery pack occurs thermal runaway, first encapsulating housing 10 can have mechanical restraint to the battery pack,
So that the temperature sensor 30 remains the state clamped by least two cell 20.First encapsulating shell
Body 10 is preferably and is made using the heat-resisting material of hard.
First encapsulating housing 10 may include an a top cover 10a and drain pan 10b.The drain pan 10b is one end open
Hollow structure is used to accommodate the battery pack, and the top cover 10a is covered and first encapsulating housing 10 is constituted on the opening.
The top cover 10a includes that a matrix 102a, matrix 102a have relative first surface and second surface, institute
State opening of the first surface away from the drain pan 10b, opening of the second surface near the drain pan 10b.Matrix 102a
Shape can make according to the actual needs.Preferably, matrix 102a is sheet.The matrix can be made up of insulating materials.
The top cover 10a further includes that pole 104a and lug 106a, the pole 104a are arranged on described matrix
The first surface of 102a, the lug 106a are arranged on the second surface of described matrix 102a.The pole 104a includes interval
The Positive Poles and negative pole pole of setting.The lug 106a includes spaced positive pole ear and negative lug.Institute
State positive pole ear and negative lug has two ends respectively, the Positive Poles are electrically connected with one end of the positive pole ear, institute
The other end for stating positive pole ear is electrically connected with the positive terminal of the battery pack, one end of the negative pole pole and the negative lug
Electrical connection, the other end of the negative lug are connected with the negative pole end of the battery pack.The pole 104a, lug 106a with
Described matrix 102a insulate.The pole 104a, the material of lug 106a are conductive material.Described matrix 102a, pole 104a
And lug 106a can be structure as a whole.
The drain pan 10b for one end open hollow cavity structure accommodating and battery pack described in mechanical constraint.The drain pan
The shape of 10b can be designed according to the shape of the cell of the battery pack.In the embodiment of the present invention, the drain pan 10b is
One hollow cuboid.Drain pan 10b is preferably made using the heat-resisting material of hard, it is further preferable that first encapsulating shell
The material of body 10 can be made up of the heat-resisting metal material of hard, such as steel or aluminium.In the embodiment of the present invention, the drain pan 10b is
Box hat.
The battery pack includes at least two cells 20, and in each cell 20, the battery core is in institute
State good seal in the second encapsulating housing.Second encapsulating housing can be made up of Soft Roll material or Hard Roll material, such as this second
The material of encapsulating housing can be with least one in aluminum plastic film, aluminum hull, box hat, plastic housing.Preferably, second encapsulating housing
It is made up of the Soft Roll material, so as to the safety issue that battery explosion etc. can be avoided when battery thermal runaway is tested to cause.This
In inventive embodiments, the material of second encapsulating housing is aluminum plastic film.
At least two cell 20 has identical thermal characteristics.Preferably, at least two cell 20
Using electrode material, identical structure, capacity and chemical property all same described in identical.Using identical cell
20 accurately simulation can measure the internal temperature of each cell 20.Each cell 20 can be any one
Electrokinetic cell, is not limited to lithium ion battery, lithium-sulfur cell, lithium-air battery or zinc-air battery.Described in the embodiment of the present invention
At least two cells 20 are lithium ion battery.
The contact of at least two cell 20 is arranged, it is preferable that at least two cell 20 is close each other
Surface is close together, and the cell 20 for being close to arrange can preferably clamp the temperature sensor 30, so as in battery
During thermal runaway, the temperature sensor 30 can more accurately measure the maximum temperature of thermal runaway.
At least two cell 20 can it is in parallel, connect or be not connected to, as long as ensureing at least two cell
20 surfaces close each other contact and can clamp the temperature sensor 30.Preferably, at least two monomer
Battery 20 is electrically insulated.In the embodiment of the present invention, at least two cell 20 is parallel with one another.
Further, the battery pack can further include the plural cell 20, now described at least one
Individual temperature sensor 30 may be disposed at the symmetric position of the battery pack to keep the cell 20 of 30 both sides of temperature sensor
There is symmetrical and identical thermal characteristics in thermal runaway, so as to can accurately simulation measure cell 20 in thermal runaway in
Portion's temperature, especially accurately simulation can measure inside maximum temperature of the cell 20 in thermal runaway.Preferably, the electricity
Pond group includes cell 20 described in even number, and described in the even number, cell 20 is stacked, and neighboring unit cell 20
Between contact arrange.
An at least temperature sensor 30 be arranged between at least two cell 20 and by this at least two
Cell is clamped.The clamping refers to the table close to each other with least two cell 20 of the temperature sensor 30
Face contacts, and the clamping by least two cell 20 comes fixed position.The temperature sensor 30 is arranged on the electricity
The center of pond group（The symmetric position）, 20 quantity of cell of the center two is equal, and thermal characteristics is identical,
So as to battery can produce uniform and stable temperature field around the temperature sensor 30 in temperature change, beneficial to accurate detection
The exothermic temperature of the battery.
The temperature sensor 30 can be thermocouple, such as K-type thermoelectricity occasionally N-type thermocouple.Preferably, the temperature sensor
30 have wireless launcher, so as to can preferably keep the sealing of first encapsulating housing 10, when reducing thermal runaway
The error of internal temperature detection.The physical dimension of the temperature sensor 30 is less relative to the size of the cell 20,
Its structure is suitable to be clamped between at least two cell 20.Preferably, the temperature sensor 30 is sheet
Structure.Additionally, the temperature sensor 30 can also be the armoured thermocouple that probe diameter is not more than 1mm.The temperature sensor
30 temperature measurement range is 0 DEG C to 1000 DEG C.
The quantity of the temperature sensor 30 can be determined according to the quantity of the cell 20.Specifically, each institute
State temperature sensor 30 to may be provided between adjacent two cell 20, and pressed from both sides by two adjacent cells 20
Hold.Additionally, when the quantity of the cell 20 is two, can also have multiple temperature sensors 30 to be arranged on this two
Between cell 20.
Fig. 2 is seen also, the present invention further provides one kind is measured using the internal temperature of battery measurement apparatus 100
During thermal runaway, the method for internal temperature of battery, specifically includes following steps：
S1, there is provided mesuring battary, and make the internal temperature of battery measurement apparatus 100；
The internal temperature of battery measurement apparatus 100 are carried out heating until the mesuring battary occurs thermal runaway by S2；With
And
S3, monitors and analyzes the temperature of 100 inside and outside of internal temperature of battery measurement apparatus.
In above-mentioned steps S1, the mesuring battary of internal temperature when needing to measure thermal runaway can be made the battery
Group, and it is assembled into the internal temperature of battery measurement apparatus 100.
In above-mentioned steps S2, the internal temperature of battery measurement apparatus 100 can be put in adiabatic calorimetry instrument is carried out
Heating, is gradually increasing the mesuring battary temperature, until the mesuring battary occurs thermal runaway, the internal temperature of battery is surveyed
Temperature sensor 30 in amount device 100 can be between two cells 20 of real-time monitoring temperature it is each described to simulate
The internal temperature of cell.
Embodiment
In the present embodiment, the mesuring battary is monomer soft bag lithium ionic cell, wherein, the monomer soft bag lithium ionic cell
Positive electrode active materials be nickel-cobalt-manganese ternary material, negative active core-shell material is graphite, and capacity is 12.5Ah.There is provided two materials and
The identical monomer soft bag lithium ionic cell of geometry is simultaneously unified into the battery pack that capacity is 25Ah, and assemble
Into the internal temperature of battery measurement apparatus.
Fig. 3 is seen also, the mesuring battary occurs thermal runaway at about 250 DEG C.Before it there is no thermal runaway, i.e.,
Between 3540 minutes, in heating process, 100 inside and outside temperature of the internal temperature of battery measurement apparatus is essentially identical.Occurring
During thermal runaway, 100 internal temperature of internal temperature of battery measurement apparatus is higher than external temperature.At maximum temperature, the inside battery
The internal temperature of temperature measuring equipment 100 has reached 877 DEG C, and outside maximum temperature is only 453 DEG C.Further will after thermal runaway
The internal temperature of battery measurement apparatus 100 are found after taking apart, the second encapsulating housing aluminum plastic film and as the battery core
In current collector aluminum foil etc. all melt.About 660 DEG C of the fusing point of aluminium, the fusing of aluminium is indicated indirectly using the inside battery temperature
Degree measurement apparatus 100 can accurately measure the inside battery maximum temperature under thermal runaway.The acquisition of the inside battery maximum temperature
Contribute to instructing the battery pack in electrokinetic cell in design can to carry out between adjacent cell it is appropriate it is suitable every
Heat, so as to prevent after a certain cell thermal runaway, thermal runaway expands to other adjacent cells, so as to effectively carry
The security and stability of high electrokinetic cell.
Internal temperature of battery measurement apparatus provided in an embodiment of the present invention, temperature sensor is clamped in described at least two
Itself has between the cell of encapsulating structure, then the clamping is made up of the cell of the temperature sensor again
Battery unit package can't affect while internal temperature of battery the cell so as to measure in another encapsulating structure
Chemical property.Further, since the temperature sensor is clamped between two cells, so as to the temperature sensor can
To measure internal temperature of each cell after thermal runaway by the two section accurate simulations of cells, especially can be with
Inside maximum temperature of the cell after thermal runaway is measured accurately, so as to can subsequently be monomer electricity in electrokinetic cell
The design of the security and stability of pond group is provided and is effectively instructed.
In addition, those skilled in the art can be to do other changes in spirit of the invention, certainly, these are according to the present invention
The change done by spirit, should all be included within scope of the present invention.
Claims (10)
1. a kind of internal temperature of battery measurement apparatus, it is characterised in that by the first encapsulating housing, and it is arranged on first encapsulation
The battery pack of enclosure interior and multiple temperature sensors composition, the battery pack include at least two cells, and this at least two
Cell is stacked, and each cell includes battery core and the second encapsulating housing, and second encapsulating housing will
The battery core is encapsulated wherein, and the plurality of temperature sensor is arranged between at least two cell to be used to test in battery
Temperature during portion's thermal runaway, two adjacent cells clamp multiple temperature sensors, and the temperature sensor has
Wireless launcher.
2. internal temperature of battery measurement apparatus as claimed in claim 1, it is characterised in that at least two cells tool
There are geometry, material and the discharge capacity of identical thermal characteristics and at least two cell identical.
3. internal temperature of battery measurement apparatus as claimed in claim 1, it is characterised in that at least two cell exists
It is close to arrange in the surface of stacking.
4. internal temperature of battery measurement apparatus as claimed in claim 1, it is characterised in that the battery pack includes two or more
The cell, and the quantity of the cell is even number.
5. internal temperature of battery measurement apparatus as claimed in claim 1, it is characterised in that second encapsulating housing is Soft Roll
Encapsulating material.
6. internal temperature of battery measurement apparatus as claimed in claim 1, it is characterised in that at least two cell it
Between be electrically insulated.
7. internal temperature of battery measurement apparatus as claimed in claim 1, it is characterised in that first encapsulating housing includes top
Lid and drain pan, hollow structure of the drain pan for one end open, the top cover are covered and constitute first envelope in the opening
Dress housing.
8. internal temperature of battery measurement apparatus as claimed in claim 7, it is characterised in that the top cover includes matrix, pole
And lug, described matrix has relative first surface and second surface, and the first surface is away from the opening, described
Near the opening, the pole includes Positive Poles and the negative pole pole for being disposed on the first surface to second surface,
The lug includes the positive pole ear and negative lug for being disposed on the second surface, the Positive Poles and the positive pole
Lug electrically connects and is connected to the positive pole of the cell, and the negative pole pole is electrically connected and is connected to the negative lug
The negative pole of the cell, the pole, mutually insulated between lug and described matrix.
9. internal temperature of battery measurement apparatus as claimed in claim 1, it is characterised in that first encapsulating housing is using hard
The heat-resisting material of matter.
10. internal temperature of battery measurement apparatus as claimed in claim 1, it is characterised in that the temperature sensor is thermoelectricity
It is even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410082645.4A CN103904381B (en) | 2014-03-07 | 2014-03-07 | Internal temperature of battery measurement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410082645.4A CN103904381B (en) | 2014-03-07 | 2014-03-07 | Internal temperature of battery measurement apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN103904381A CN103904381A (en) | 2014-07-02 |
| CN103904381B true CN103904381B (en) | 2017-04-05 |
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| CN201410082645.4A Active CN103904381B (en) | 2014-03-07 | 2014-03-07 | Internal temperature of battery measurement apparatus |
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| CN105826511B (en) * | 2016-03-04 | 2018-08-28 | 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 |
| CN106450566A (en) * | 2016-09-20 | 2017-02-22 | 广东工业大学 | Power battery module with disaster prevention system |
| CN106549193A (en) * | 2017-01-23 | 2017-03-29 | 福建省汽车工业集团云度新能源汽车股份有限公司 | A kind of measuring method and its measurement apparatus of internal temperature of power battery |
| CN107219326B (en) * | 2017-05-26 | 2021-02-26 | 中国电力科学研究院 | Performance evaluation method and evaluation system of flame-retardant material for secondary battery |
| CN107946682A (en) * | 2017-12-15 | 2018-04-20 | 浙江隆劲电池科技有限公司 | A kind of lithium battery of detectable internal temperature and pressure |
| CN108896923A (en) * | 2018-06-28 | 2018-11-27 | 合肥国轩高科动力能源有限公司 | Device and method for testing overcurrent capacity of current collector of lithium battery |
| CN110534831B (en) * | 2019-08-12 | 2021-06-11 | 清华大学 | Method for measuring internal temperature of battery |
| CN110515006A (en) * | 2019-10-09 | 2019-11-29 | 山东元齐新动力科技有限公司 | A kind of battery pack, the management method of battery pack and vehicle |
| CN112227760B (en) * | 2020-11-18 | 2021-12-14 | 重庆市富正建筑工程有限公司 | Broken equipment of tearing open of old and useless building |
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Inventor after: Feng Xuning Inventor after: Zhang Mingxuan Inventor after: Ouyang Minggao Inventor after: Lu Languang Inventor after: He Xiangming Inventor after: Wu Peng Inventor after: Shi Defen Inventor after: C. Kuper Inventor before: Feng Xuning Inventor before: Zhang Mingxuan Inventor before: Lu Languang Inventor before: Ouyang Minggao Inventor before: He Xiangming |
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