CN205646008U - Battery module - Google Patents
Battery module Download PDFInfo
- Publication number
- CN205646008U CN205646008U CN201620497998.5U CN201620497998U CN205646008U CN 205646008 U CN205646008 U CN 205646008U CN 201620497998 U CN201620497998 U CN 201620497998U CN 205646008 U CN205646008 U CN 205646008U
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- battery modules
- framework
- cell
- battery cell
- expansible graphite
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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 provides a battery module, it includes: a plurality of battery cell arrange along array orientation in proper order, the framework is acceptd and is fixed a plurality of battery cell, and the protection shield, set up the framework with between a plurality of battery cell to separate framework and battery cell's the side along fore -and -aft direction F. Wherein the protection shield includes: but expandable graphite board, but base member that forms including the bonding agent and the expandable graphite granule in the base member of distributing, and the insulating seal membrane, but one side towards battery cell of at least cladding expandable graphite board, in order to incite somebody to action but a plurality of battery cell separate with the expandable graphite board. In the basis the utility model discloses an among the battery module, when certain battery cell takes place thermal runaway, but the volume expanded in the twinkling of an eye after high temperature was met to the expandable graphite board of protection shield, at the expanded in -process, can reduce to transmit other battery cell's not out of control heat through the framework, suppressed or slowed down spreading of thermal runaway, improved battery module's security performance.
Description
Technical field
This utility model relates to field of batteries, particularly relates to a kind of battery modules.
Background technology
Lithium ion battery have compared with other traditional secondary battery than can high, power-performance outstanding etc. excellent
Gesture.Thus, lithium ion battery is not only applied in electric consumers field maturation, the most gradually expands in newly
Energy automobile, electric yacht and energy storage field.High-energy, Gao Gong gradually it is extended to along with lithium ion battery
The application that rate requires, the extensive use in groups of lithium ion battery becomes the inexorable trend of its development.
But, safety issue is then one of important obstruction of lithium ion battery large-scale application.Because material bodies
System and construction features, lithium ion battery is in overcharge, overdischarge, overheated, mechanical presses, acupuncture or short
Under the conditions of road etc., inside battery can be induced a series of exothermic reactions occur, cause battery temperature to raise, high
Wen Zehui further speeds up exothermic reaction speed, causes battery heat release and temperature rise two aspect in mutually promoting
Runaway condition, i.e. " thermal runaway ", in set of cells there is " thermal runaway " in individual monomers battery, may
Chain propagation in set of cells, causes whole set of cells that the most serious burning, explosion accident occur.Right
For each needs to install the electric automobile of multiple lithium ionic cell module, once there is thermal runaway, after
Fruit is by hardly imaginable.Accordingly, it would be desirable to develop a kind of lithium ionic cell module suppressing thermal runaway to spread,
Avoid causing the thermal runaway that set of cells is overall, or delay the speed that thermal runaway spreads, win more escape
Time.
The existing lithium ionic cell module having been commercialized application, if tesla (Tesla) company is at its automobile
The patent of Li-ion batteries piles devise a kind of by the compounded isolation of heat-barrier material and elastomeric material
Plate, is positioned between battery module different lines monomer, when reducing thermal runaway with this, and heat between monomer
Propagate, and absorb explosive forces, it is achieved heat, the blocking-up of impact.Bohr season cuts Paderewski
Etc. (Berdichevsky) increase heat conduction sheet material at outside batteries and strengthen the biography between battery and cooling medium
Heat, and the metallic plate of adiabatic flame-proof sheet material and reflected radiation is positioned between different battery layers, by fall
The propagation of heat when the conduction of heat of low different battery interlayer and heat radiation block thermal runaway.Luo Linsen
(Rawlinson) in lithium ion battery bag, devise multiple loading liquid or high-melting-point low thermal conductivity
The hollow crossbeam of material, is not only divided into multiple groups by battery bag, has delayed thermal runaway between each group to propagate
Speed, moreover it is possible to side impact force is evenly distributed to crossbeam, apparatus with shock absorbing.
But, the heat discharged during lithium ion battery particularly ternary lithium ion battery thermal runaway is the hugest
Greatly.As a example by 42Ah ternary battery core, the total amount of heat discharged during thermal runaway is about 500kJ, wherein, logical
Cross battery core to be delivered to greatly the heat of adjacent battery core and account for the 20%～30% of total thermal discharge, confluxed by metal
The heat that row (Busbar) transmits accounts for 5%～10%, and the heat transmitted by metal side plate is accounted for
10～15%.Due to the restriction of lithium ionic cell module length, between battery core and battery core, it is available for the sky of Design on thermal insulation
Between the least, be only about 0.3mm as being available for the gap of Design on thermal insulation between battery core and battery core, use
At 25 DEG C, the super heat-barrier material of heat conductivity as little as 0.02w/ (m k) is all difficult to stop thermal diffusion to spread, similar
It is very big that existing design in tesla and Luo Linsen wants to stop thermal runaway to spread difficulty.
Utility model content
In view of problem present in background technology, the purpose of this utility model is to provide a kind of battery mould
Group, it can be when partial monosomy battery generation thermal runaway, and it is the most out of control that reduction is delivered to other by framework
The heat of cell, suppresses or slows down spreading of thermal runaway, improves the security performance of battery modules.
To achieve these goals, this utility model provides a kind of battery modules, comprising: multiple list
Body battery, is sequentially arranged along orientation；Framework, houses and fixes the plurality of cell；And
Protection board, is arranged between framework and the plurality of cell, with by framework and cell along front
Rear separates to the side of F.Wherein protection board includes: expansible graphite plate, is formed including bonding agent
Matrix and distribution expansible graphite granule in the base；And insulated enclosure film, at least cladding can be swollen
The side towards cell of swollen graphite cake, with by the plurality of cell and expansible graphite plate every
Open.
The beneficial effects of the utility model are as follows:
According in battery modules of the present utility model, when certain cell generation thermal runaway, protect
Volume instantaneous expansion after high temperature met by the expansible graphite plate of plate, during expanding, and can substantial amounts of absorption
The heat that described cell thermal runaway produces, simultaneously release non-flammable gases diluting monomer cells burst institute
The oxygen needed；It addition, the expansible graphite plate after Peng Zhanging can cover described cell, starvation with
Avoiding this cell to burn, isolation heat prevents this cell from affecting other cell simultaneously,
Meanwhile, bulky after the expansion of expansible graphite plate, rapidly the side of framework with cell is thoroughly divided
From, it is to avoid the heat that thermal failure produces is delivered to adjacent cell by framework by this cell；
Expansible graphite plate is during reaction, and rate of heat release is low, and mass loss is little, and the flue gas of generation is few,
And can regeneration after a procedure, do not result in secondary pollution.
Accompanying drawing explanation
Fig. 1 is the schematic diagram according to battery modules of the present utility model；
Fig. 2 is the schematic diagram of an embodiment of the protection board according to battery modules of the present utility model；
Fig. 3 is the schematic diagram of another embodiment of the protection board according to battery modules of the present utility model.
Wherein, description of reference numerals is as follows:
1 cell 32 insulated enclosure film
2 framework 4 heat insulating mattress
21 end plates 5 connect sheet
22 side plate D orientations
3 protection board F fore-and-aft directions
31 expansible graphite plates
Detailed description of the invention
Describe battery modules of the present utility model with reference to the accompanying drawings in detail.
Referring to figs. 1 through Fig. 3, include according to battery modules of the present utility model: multiple cells 1,
It is sequentially arranged along orientation D；Framework 2, houses and fixes the plurality of cell 1；And protect
Backplate 3, is arranged between framework 2 and the plurality of cell 1, with by framework 2 and cell
The side of the F along the longitudinal direction of 1 separates.Wherein protection board 3 includes: expansible graphite plate 31, including
The matrix of bonding agent formation and distribution expansible graphite granule in the base；And insulated enclosure film
32, at least it is coated with the side towards cell 1 of expansible graphite plate 31, with by the plurality of list
Body battery 1 separates with expansible graphite plate 31.
According in battery modules of the present utility model, when certain cell 1 occurs thermal runaway (such as
The conditions such as overcharge, overdischarge, overheated, mechanical presses, acupuncture or short circuit that are likely to be due to cause) time,
Volume instantaneous expansion after high temperature met by the expansible graphite plate 31 of protection board 3, during expanding, and meeting
The heat that substantial amounts of absorption described cell 1 thermal runaway produces, discharges non-flammable gases (main simultaneously
It is SO2、CO2And steam) diluting monomer battery 1 burns required oxygen；It addition, after Peng Zhanging
Expansible graphite plate 31 can cover described cell 1, starvation to avoid this cell 1 to burn,
Isolation heat prevents this cell 1 from affecting other cell 1, meanwhile, expansible graphite simultaneously
Bulky after plate 31 expansion, is completely separated the side of framework 2 with cell 1 rapidly, it is to avoid
The heat that thermal failure produces is delivered to adjacent cell 1 by framework 2 by this cell 1；Can
Expanded graphite plate 31 is during reaction, and rate of heat release is low, and mass loss is little, and the flue gas of generation is few,
And can regeneration after a procedure, do not result in secondary pollution.
According in the embodiment in battery modules of the present utility model, with reference to Fig. 1, framework 2 includes:
Two end plates 21, lay respectively at the two ends of the orientation D of multiple cell 1；And two sides
Plate 22, lays respectively at the both sides of direction F before and after multiple cell 1.
According in battery modules of the present utility model, it is desirable to expansible graphite granule have good can be swollen
Swollen property, heat-resisting quantity, thermal insulation, plasticity and chemical stability.An embodiment in, described can
The temperature that expanded graphite particles starts to expand is 100 DEG C～250 DEG C, and the purity of expansible graphite granule is more than
95%, granule size is 30 mesh～325 mesh, allowance for expansion >=100ml/g.
According in the embodiment in battery modules of the present utility model, described bonding agent is polyurethane
(PU), acroleic acid resin or polyimides (PI), this kind of bonding agent possesses that backbone flexibility is good, tolerance
Impact endurance test shock and flexural fatigue, the features such as peel strength is high, it is possible to cold curing, and cohesive force is strong.
According in battery modules of the present utility model, the effect of insulated enclosure film 32 be insulation, waterproof,
Ensure that expansible graphite plate 31 will not pollute battery modules in normal conditions.Meanwhile, insulated enclosure film
32 package strength when being coated with expansible graphite plate 31 can not be the biggest, it is ensured that expansible graphite plate 31 is subject to
Insulated enclosure film 32 can be broken through during thermal expansion.In one embodiment, insulated enclosure film 32 is that polyamides is sub-
Amine thin film (PI thin film) or polypropylene film (PP thin film).This kind of insulated enclosure film 32 has excellent
Resistant of high or low temperature, electric insulating quality, caking property, radiation resistance, resistance to medium, can at-20 DEG C～
Life-time service within the temperature range of 250 DEG C, can reach more than 400 DEG C in short-term.
According in the embodiment in battery modules of the present utility model, expansible graphite plate 31 passes through
Coating is formed in framework 2.Expansible graphite granule is mixed stir with bonding agent (such as polyimides)
Mixing form slurry, is then coated on the F along the longitudinal direction of framework 2 and cell 1 uniformly by slurry
The relative part (i.e. side plate 22) in side, the thickness of slurry coating is 0.3mm～3mm.
According in the embodiment in battery modules of the present utility model, with reference to Fig. 2, insulated enclosure film
32 also extend in framework 2.Therefore, insulated enclosure film 32 is by expansible graphite plate 31 and cell
1 is completely separated and form insulation.
According in the embodiment in battery modules of the present utility model, with reference to Fig. 3, expansible graphite
Plate 31 is the plate of independent molding in advance.Use churned mechanically method by bonding agent (polyurethane or third
Olefin(e) acid resin) mix homogeneously according to a certain percentage with inflatable type graphite granule, mixture is broken after drying
It is broken into powder, then mixed powder is put into compression molding under room temperature and certain pressure in mould, then warp
Expansible graphite plate 31 is i.e. can get after overcuring process, cooling.
According in the embodiment in battery modules of the present utility model, with reference to Fig. 3, insulated enclosure film
32 fully wrapped around expansible graphite plates 31.
According in the embodiment in battery modules of the present utility model, in expansible graphite plate 31,
The quality of expansible graphite granule/(quality of the quality of bonding agent+expansible graphite granule) is
5%-30%.
According in the embodiment in battery modules of the present utility model, with reference to Fig. 1, described battery mould
Group also includes: heat insulating mattress 4, is arranged between adjacent two cells 1.
According in the embodiment in battery modules of the present utility model, with reference to Fig. 1, described battery mould
Group also includes: connect sheet 5, by corresponding cell 1 connection in series-parallel.
Claims (10)
1. a battery modules, including:
Multiple cells (1), are sequentially arranged along orientation (D)；And
Framework (2), houses and fixes the plurality of cell (1)；
It is characterized in that,
Described battery modules also includes protection board (3), is arranged on framework (2) and the plurality of monomer electricity
Between pond (1), with by the side of framework (2) and (F) along the longitudinal direction of cell (1) every
Opening, protection board (3) including:
Expansible graphite plate (31), the matrix formed including bonding agent and distribution are in the base
Expansible graphite granule；And
Insulated enclosure film (32), at least cladding expansible graphite plate (31) towards cell
(1) side, to separate the plurality of cell (1) with expansible graphite plate (31).
Battery modules the most according to claim 1, it is characterised in that framework (2) including:
Two end plates (21), lay respectively at the two ends of the orientation (D) of multiple cell (1)；
And
Two side plates (22), lay respectively at the both sides in direction (F) before and after multiple cell (1).
Battery modules the most according to claim 1, it is characterised in that described expansible graphite granule
Granule size be 30 mesh～325 mesh.
Battery modules the most according to claim 1, it is characterised in that described bonding agent be polyurethane,
Acroleic acid resin or polyimides.
Battery modules the most according to claim 1, it is characterised in that insulated enclosure film (32) is
Kapton or polypropylene film.
Battery modules the most according to claim 1, it is characterised in that expansible graphite plate (31)
It is formed in framework (2) by coating.
Battery modules the most according to claim 6, it is characterised in that insulated enclosure film (32) is also
Extend in framework (2).
Battery modules the most according to claim 1, it is characterised in that expansible graphite plate (31)
Plate for independent molding in advance.
Battery modules the most according to claim 8, it is characterised in that insulated enclosure film (32) is complete
Full encapsulating expandable graphite cake (31).
Battery modules the most according to claim 1, it is characterised in that described battery modules also includes:
Heat insulating mattress (4), is arranged between adjacent two cells (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620497998.5U CN205646008U (en) | 2016-05-26 | 2016-05-26 | Battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620497998.5U CN205646008U (en) | 2016-05-26 | 2016-05-26 | Battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205646008U true CN205646008U (en) | 2016-10-12 |
Family
ID=57052477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620497998.5U Active CN205646008U (en) | 2016-05-26 | 2016-05-26 | Battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205646008U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437631A (en) * | 2016-05-26 | 2017-12-05 | 宁德时代新能源科技股份有限公司 | Battery module |
| CN107978723A (en) * | 2016-10-21 | 2018-05-01 | 宁德时代新能源科技股份有限公司 | Heat insulation cotton, preparation method thereof and battery module applying heat insulation cotton |
| CN110392947A (en) * | 2017-03-29 | 2019-10-29 | 松下知识产权经营株式会社 | Secondary cell |
| WO2020210857A1 (en) * | 2019-04-18 | 2020-10-22 | Secvel Technolgies Gmbh | Bag |
-
2016
- 2016-05-26 CN CN201620497998.5U patent/CN205646008U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437631A (en) * | 2016-05-26 | 2017-12-05 | 宁德时代新能源科技股份有限公司 | Battery module |
| CN107978723A (en) * | 2016-10-21 | 2018-05-01 | 宁德时代新能源科技股份有限公司 | Heat insulation cotton, preparation method thereof and battery module applying heat insulation cotton |
| CN110392947A (en) * | 2017-03-29 | 2019-10-29 | 松下知识产权经营株式会社 | Secondary cell |
| CN110392947B (en) * | 2017-03-29 | 2022-11-25 | 松下知识产权经营株式会社 | Secondary battery |
| WO2020210857A1 (en) * | 2019-04-18 | 2020-10-22 | Secvel Technolgies Gmbh | Bag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |