CN204315689U - A kind of lithium ionic cell module suppressing thermal runaway to spread - Google Patents
A kind of lithium ionic cell module suppressing thermal runaway to spread Download PDFInfo
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- CN204315689U CN204315689U CN201420745644.9U CN201420745644U CN204315689U CN 204315689 U CN204315689 U CN 204315689U CN 201420745644 U CN201420745644 U CN 201420745644U CN 204315689 U CN204315689 U CN 204315689U
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- thermal runaway
- cell module
- ionic cell
- package assembly
- lithium ionic
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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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Abstract
The utility model is that it comprises about a kind of lithium ionic cell module suppressing thermal runaway to spread: monomer lithium ion battery, heat insulating mattress, end plate and heat-conducting system; Heat-conducting system comprises conducting strip and hydroecium, conducting strip and hydroecium thermo-contact; Wherein, conducting strip, monomer lithium ion battery and heat insulating mattress fit together successively, and make the one side of wherein each monomer lithium ion battery be described heat insulating mattress, another side is conducting strip; Respectively end plate is installed at the two ends of above-mentioned package assembly, compresses above-mentioned package assembly by end plate.The utility model compresses battery pack, the setting of the heat insulating mattress between battery and efficiently heat-conducting system by adopting forward thrust, can reach the object suppressing thermal runaway to spread, while this technical scheme do not affect the heat management of battery pack under accidental conditions.
Description
Technical field
The utility model relates to a kind of lithium ionic cell module of technical field of lithium ion, particularly relates to a kind of lithium ionic cell module suppressing thermal runaway to spread.
Background technology
Hybrid vehicle (Hybrid Electric Vehicle, be called for short HEV) and pure electric automobile (peak envelope voltage, be called for short PEV) by supplementary rechargeable battery with replace traditional explosive motor (ICE) completely for the motive conventional means of automobile with rechargeable battery and provide replacement scheme.The various battery frameworks such as Ni-MH battery, lead-acid battery, lithium polymer battery or lithium ion battery wherein can be adopted to provide motive power and power demand to HEV and PEV.At present, the application prospect of lithium ion battery is the most good.
Lithium ion battery has very high energy density, and adopts combustible organic solvent and organic salt as electrolyte, therefore has certain potential safety hazard.Overcharge, overdischarge, overheated, mechanical presses, acupuncture and inner micro-short circuit etc. all likely cause lithium ion battery thermal runaway, and cause burning or explosion accident, this has become the significant obstacle that lithium ion battery is applied on electric automobile.Extraneous abuse (comprising electricity, heat, mechanical aspects) generally can adopt battery management system (BMS), and firm Battery case is protected.But the defect that inside battery causes due to design or manufacture process, can cause internal short-circuit accident, cause battery to smolder, spontaneous combustion or blast.And the thermal runaway of single lithium ion battery can pass to rapidly adjacent lithium ion battery.The probability of happening industry highest level of this accident can control 1 mono-/10000000th, this for common electronic products power supply be acceptable.But each is needed to the electric automobile of installation 100 ~ 10000 pieces of lithium ion batteries, probability can be extended to millesimal level, and this cannot accept.Therefore need the assembling mode designing a kind of lithium ion battery, to suppress spreading of this thermal runaway, avoid the speed causing the thermal runaway of battery pack entirety or greatly slow down thermal runaway, to the escape time that occupant is enough.
The lithium ionic cell module of existing commercial applications, such as, famous daily output listens 2 of the aluminium alloy box packaging that wind (" Leaf ") adopts and the little module of 2 strings, series-parallel operation directly can be carried out in the basis of this module, but it is without cooling system, do not consider the safeguard procedures under thermal runaway yet, it mainly by ensure cell be perfectly safe and the strategy of high reliability realizes; And for example, the battery module of general Chevrolet Volt extended-range hybrid electric vehicle, it adopts flammable cooling fluid to carry out battery pack cooling, but its safeguard procedures under thermal runaway is also not enough; For another example, a kind of battery module with the corrugated fin of continuous bend described by patent publication No. CN103066313A, as shown in Figure 1, also easy the spreading of occurrence of large-area when its single battery generation thermal runaway.
As can be seen here, above-mentioned existing lithium ionic cell module still has the space of improving and promoting in suppression thermal runaway spreads.
Summary of the invention
Because the defect existing for above-mentioned prior art, the purpose of this utility model is, a kind of lithium ionic cell module suppressing thermal runaway to spread is provided, it is made to pass through directed applying thrust, thermal insulation layer and heat-conducting mechanism is increased between battery, and adopt the cooling fluid of fire-retardant heat absorption, can ensure not occur to spread fast when single battery generation thermal runaway, meet the high security requirement needed for electric automobile.
To achieve these goals, according to a kind of lithium ionic cell module suppressing thermal runaway to spread that the utility model proposes, it comprises: monomer lithium ion battery, heat insulating mattress, end plate and heat-conducting system; Described heat-conducting system comprises conducting strip and hydroecium, described conducting strip and described hydroecium thermo-contact; Wherein, described conducting strip, described monomer lithium ion battery and described heat insulating mattress fit together successively, and make the one side of wherein each described monomer lithium ion battery be described heat insulating mattress, another side is described conducting strip; At the two ends of above-mentioned package assembly, described end plate is installed respectively, compresses above-mentioned package assembly by described end plate.
The utility model also can be applied to the following technical measures to achieve further.
The aforesaid lithium ionic cell module suppressing thermal runaway to spread, also comprises plastic frame, and each described monomer lithium ion battery 1 is fixed on a described plastic frame.
The aforesaid lithium ionic cell module suppressing thermal runaway to spread, also comprises screw mandrel, and described screw mandrel, through the described end plate at above-mentioned package assembly two ends, applies pressure to the described end plate at above-mentioned package assembly two ends, compresses above-mentioned package assembly.
The aforesaid lithium ionic cell module suppressing thermal runaway to spread, also comprises bandage, and described bandage, through the described end plate at above-mentioned package assembly two ends, applies pressure to the described end plate at above-mentioned package assembly two ends, compresses above-mentioned package assembly.
The aforesaid lithium ionic cell module suppressing thermal runaway to spread, wherein said bandage is steel band or stainless steel band.
The aforesaid lithium ionic cell module suppressing thermal runaway to spread, wherein by described screw mandrel or described bandage, the described end plate to above-mentioned package assembly two ends applies the pressure of 0.01-5MPa.
The aforesaid lithium ionic cell module suppressing thermal runaway to spread, wherein said heat insulating mattress selects material and the thickness of different fire resistance rating according to the security feature of dissimilar monomer lithium ion battery, its refractory temperature is between 150-1500 DEG C, and thickness is between 0.1-10mm.
The aforesaid lithium ionic cell module suppressing thermal runaway to spread, wherein said hydroecium is installed on the side of above-mentioned package assembly, and is provided with explosion-proof relief valve; The thermo-contact mode of described conducting strip and described hydroecium for welding, clamping or be fixedly connected with bolt.
The aforesaid lithium ionic cell module suppressing thermal runaway to spread, the cooling liquid in wherein said hydroecium is mixed liquor, the HFC class organic liquid of water and ethylene glycol or fluoridizes ketone organic liquid.
The aforesaid lithium ionic cell module suppressing thermal runaway to spread, wherein said lithium ionic cell module is also provided with lug brace and low voltage wiring harness.
The utility model compared with prior art has obvious advantage and beneficial effect.By technique scheme, a kind of lithium ionic cell module suppressing thermal runaway to spread of the present utility model, at least has following advantages:
One, the utility model can suppress the lithium ionic cell module that thermal runaway spreads, by the design to structure and cooling system, can ensure the heating that causes at the internal short-circuit caused due to cell manufacture or design defect even in thermal runaway situation, heat can not be expanded fast towards periphery; And utilize evaporative heat loss system by heat absorption simultaneously, finally reach the object suppressing thermal runaway to spread.
Two, the utility model can suppress the lithium ionic cell module that thermal runaway spreads, by the design to structure and cooling system, can ensure when outside electricity abuse, heat abuse or machinery abuse, prevent the Quick Extended of local cell thermal runaway, to occupant with sufficient security protection and enough escape time.
Accompanying drawing explanation
Fig. 1 is existing a kind of schematic diagram with the battery module of the corrugated fin of continuous bend.
Fig. 2 is the exploded perspective schematic diagram of a preferred embodiment of a kind of lithium ionic cell module suppressing thermal runaway to spread of the utility model.
Fig. 3 is the monomer lithium ion battery of a preferred embodiment of a kind of lithium ionic cell module suppressing thermal runaway to spread of the utility model, heat insulating mattress, plastic frame assemble successively with conducting strip together with exploded perspective schematic diagram.
Embodiment
For further setting forth the utility model for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, describe in detail according to a kind of its embodiment of the lithium ionic cell module suppressing thermal runaway to spread, step, structure, feature and the effect thereof that the utility model proposes.
Refer to shown in Fig. 2 and Fig. 3, Fig. 2 is the exploded perspective schematic diagram of a preferred embodiment of a kind of lithium ionic cell module suppressing thermal runaway to spread of the utility model.Fig. 3 is the monomer lithium ion battery of a preferred embodiment of a kind of lithium ionic cell module suppressing thermal runaway to spread of the utility model, heat insulating mattress, plastic frame assemble successively with conducting strip together with exploded perspective schematic diagram.
A kind of lithium ionic cell module suppressing thermal runaway to spread of the utility model forms primarily of monomer lithium ion battery 1, heat insulating mattress 2, end plate 7 and heat-conducting system.Wherein, heat-conducting system comprises conducting strip 4 and hydroecium 6, conducting strip 4 and hydroecium 6 thermo-contact.Conducting strip 4, monomer lithium ion battery 1 and heat insulating mattress 2 fit together successively, and make the one side of wherein each monomer lithium ion battery 1 be heat insulating mattress 2, another side is conducting strip 4.The utility model determines the quantity that conducting strip 4, monomer lithium ion battery 1 and the heat insulating mattress 2 installed combine, to ensure the needs of voltage and capacity according to the needs of space and dynamical system.At the two ends of above-mentioned package assembly, end plate 7 is installed respectively, compresses above-mentioned package assembly by end plate 7.
As shown in Figure 3, the lithium ionic cell module that the utility model can suppress thermal runaway to spread also is provided with plastic frame 3, and each monomer lithium ion battery 1 is fixed on a plastic frame 3.
Wherein, in a preferred embodiment of the present utility model, it is by the end plate 7 of screw mandrel 8 through above-mentioned package assembly two ends that end plate 7 compresses above-mentioned package assembly, applies pressure to realize to the end plate 7 at above-mentioned package assembly two ends.In another preferred embodiment of the present utility model, it is by the end plate 7 of bandage through above-mentioned package assembly two ends that end plate 7 compresses above-mentioned package assembly, apply pressure to realize to the end plate 7 at above-mentioned package assembly two ends, wherein bandage can be steel band or stainless steel band.By screw mandrel 8 or bandage, the end plate 7 to above-mentioned package assembly two ends applies the pressure of 0.01-5MPa to the utility model.
Heat insulating mattress 2 of the present utility model selects material and the thickness of different fire resistance rating according to the security feature of dissimilar monomer lithium ion battery 1, and its refractory temperature is between 150-1500 DEG C, and thickness is between 0.1-10mm.
Hydroecium 6 of the present utility model is installed on the side of above-mentioned package assembly, and is provided with explosion-proof relief valve 11.Wherein, hydroecium 6 and conducting strip 4 are all high conductivity material manufacture, the thermo-contact mode of conducting strip 4 and hydroecium 6 for welding, clamping or be fixedly connected with bolt.Cooling liquid in the utility model hydroecium 6 is generally the liquid of serviceability temperature wide ranges, as water and ethylene glycol mixed liquor, HFC class organic liquid or fluoridize ketone organic liquid, wherein preferred fluorinated ketone organic liquid.The explosion-proof relief valve 11 that the utility model hydroecium 6 is installed, releases pressure too high in hydroecium 6 from explosion-proof relief valve 11 when hydroecium 6 absorbs amount of heat, ensures the safety of battery module.
As shown in Figure 1, the lithium ionic cell module that the utility model can suppress thermal runaway to spread also is provided with lug brace 10 and low voltage wiring harness 9.
Below by way of illustrating the inhibitory action that the lithium ionic cell module that the utility model can suppress thermal runaway to spread spreads thermal runaway.
Example one: a kind of lithium ionic cell module adopting the utility model to make, is of a size of 580 (length) * 170 (height) * 290mm (wide), and total weight is 45kg.Adopt 60Ah ferric phosphate lithium cell 2 and 12 string compositions, and with plastic frame securing unit battery.The 1.0mm thick A0 level fire-resistant foam temperature of resistance to 250 DEG C (can) is adopted as heat insulating mattress, to adopt thick 6061 aluminium alloy plates of 1.2mm as conducting strip.Pressure at two ends adopts two bandage form to apply, and pressure is 4000N.Adopt the Novec1230 of 3M company as the cooling fluid in hydroecium.Overcharge is implemented to the 3rd cell of lithium ionic cell module, temperature sensor is attached on the 2nd, 3,4 cell surface, overcharge process is 60A electric current constant current charge, when the 3rd monomer battery voltage rises to 30V, this cell is smoldered generation thermal runaway, now stops charging.The temperature detecting the 3rd cell surface reaches 200 DEG C, and the temperature on the adjacent the 2nd, 4 cell surface reaches 120 DEG C, 130 DEG C respectively, and on fire or explosion phenomenon does not occur whole process.
Example two: a kind of lithium ionic cell module adopting the utility model to make, is of a size of 600 (length) * 190 (height) * 270mm (wide), and total weight is 43kg.Adopt 20Ah ternary system lithium battery 3 and 24 string compositions, and with plastic frame securing unit battery.The 3.0mm thick A0 level refractory fiber cotton temperature of resistance to 600 DEG C (can) is adopted as heat insulating mattress, to adopt thick 6061 aluminium alloy plates of 1.0mm as conducting strip.Pressure at two ends adopts screw mandrel form to apply, and pressure is 3000N.Adopt the Novec1230 of 3M company as the cooling fluid in hydroecium.Overcharge is implemented to the 3rd cell of lithium ionic cell module, temperature sensor is attached on the 2nd, 3,4 cell surface, overcharge process is 20A electric current constant current charge, when the 3rd monomer battery voltage rises to 18V, this cell is smoldered generation thermal runaway, now stops charging.The temperature detecting the 3rd cell surface is up to 450 DEG C, and the temperature best result on adjacent 2nd, 4 cell surface does not reach 130 DEG C, 125 DEG C, and on fire or explosion phenomenon does not occur whole process.
The utility model applies forward thrust by end plate to battery pack, internal battery pack thermal runaway part can be hindered the absorption of oxygen, delay the reaction speed of thermal runaway; By the setting of battery interval heat pad, the heat of heating battery cell can be hindered fast to the diffusion of adjacent cell; By heat-conducting system efficiently, the amount of heat that thermal runaway produces can be derived immediately by conducting strip, allow gasifiable fire-retardant organic liquid absorb, thus reach and suppress the object that spreads of thermal runaway, this technical scheme does not also affect the heat management of battery pack under accidental conditions simultaneously.
Although the utility model discloses as above with preferred embodiment, so and be not used to limit the scope that the utility model implements, the simple equivalence change done according to claims of the present utility model and description and modification, still belong in the scope of technical solutions of the utility model.
Claims (10)
1. the lithium ionic cell module that thermal runaway can be suppressed to spread, is characterized in that it comprises: monomer lithium ion battery (1), heat insulating mattress (2), end plate (7) and heat-conducting system; Described heat-conducting system comprises conducting strip (4) and hydroecium (6), described conducting strip (4) and described hydroecium (6) thermo-contact; Wherein, described conducting strip (4), described monomer lithium ion battery (1) and described heat insulating mattress (2) fit together successively, make the one side of wherein each described monomer lithium ion battery (1) be described heat insulating mattress (2), another side is described conducting strip (4); Described end plate (7) is installed respectively at the two ends of above-mentioned package assembly, compresses above-mentioned package assembly by described end plate (7).
2. the lithium ionic cell module suppressing thermal runaway to spread according to claim 1, it is characterized in that it also comprises plastic frame (3), each described monomer lithium ion battery (1) is fixed on a described plastic frame (3).
3. the lithium ionic cell module suppressing thermal runaway to spread according to claim 1, it is characterized in that it also comprises screw mandrel (8), described screw mandrel (8) is through the described end plate (7) at above-mentioned package assembly two ends, pressure is applied to the described end plate (7) at above-mentioned package assembly two ends, compresses above-mentioned package assembly.
4. the lithium ionic cell module suppressing thermal runaway to spread according to claim 1, it is characterized in that it also comprises bandage, described bandage is through the described end plate (7) at above-mentioned package assembly two ends, pressure is applied to the described end plate (7) at above-mentioned package assembly two ends, compresses above-mentioned package assembly.
5. the lithium ionic cell module suppressing thermal runaway to spread according to claim 4, is characterized in that wherein said bandage is steel band or stainless steel band.
6. the lithium ionic cell module that the suppressed thermal runaway according to claim 3 or 4 spreads, is characterized in that wherein applying the pressure of 0.01-5MPa by described screw mandrel (8) or described bandage to the described end plate (7) at above-mentioned package assembly two ends.
7. the lithium ionic cell module suppressing thermal runaway to spread according to claim 1, it is characterized in that the refractory temperature of wherein said heat insulating mattress (2) is between 150-1500 DEG C, thickness is between 0.1-10mm.
8. the lithium ionic cell module suppressing thermal runaway to spread according to claim 1, is characterized in that wherein said hydroecium (6) is installed on the side of above-mentioned package assembly, and is provided with explosion-proof relief valve (11); The thermo-contact mode of described conducting strip (4) and described hydroecium (6) for welding, clamping or be fixedly connected with bolt.
9. the lithium ionic cell module suppressing thermal runaway to spread according to claim 1, is characterized in that the cooling liquid in wherein said hydroecium (6) is HFC class organic liquid or fluoridizes ketone organic liquid.
10. the lithium ionic cell module suppressing thermal runaway to spread according to claim 1, is characterized in that described lithium ionic cell module is also provided with lug brace (10) and low voltage wiring harness (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420745644.9U CN204315689U (en) | 2014-12-01 | 2014-12-01 | A kind of lithium ionic cell module suppressing thermal runaway to spread |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420745644.9U CN204315689U (en) | 2014-12-01 | 2014-12-01 | A kind of lithium ionic cell module suppressing thermal runaway to spread |
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| CN204315689U true CN204315689U (en) | 2015-05-06 |
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| CN201420745644.9U Withdrawn - After Issue CN204315689U (en) | 2014-12-01 | 2014-12-01 | A kind of lithium ionic cell module suppressing thermal runaway to spread |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633502A (en) * | 2014-12-01 | 2016-06-01 | 北京华特时代电动汽车技术有限公司 | Lithium ion battery module capable of restraining thermal runaway extension |
| CN108110376A (en) * | 2017-12-22 | 2018-06-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of fire-retardant cooling type lithium ionic cell module |
| CN114354354A (en) * | 2021-12-09 | 2022-04-15 | 万向一二三股份公司 | Method for evaluating influence of subcritical abuse on performance of lithium ion battery |
-
2014
- 2014-12-01 CN CN201420745644.9U patent/CN204315689U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633502A (en) * | 2014-12-01 | 2016-06-01 | 北京华特时代电动汽车技术有限公司 | Lithium ion battery module capable of restraining thermal runaway extension |
| CN105633502B (en) * | 2014-12-01 | 2018-11-09 | 北京华特时代电动汽车技术有限公司 | A kind of lithium ionic cell module can inhibit thermal runaway sprawling |
| CN108110376A (en) * | 2017-12-22 | 2018-06-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of fire-retardant cooling type lithium ionic cell module |
| CN114354354A (en) * | 2021-12-09 | 2022-04-15 | 万向一二三股份公司 | Method for evaluating influence of subcritical abuse on performance of lithium ion battery |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150506 Effective date of abandoning: 20181109 |