CN209056524U - A kind of battery pack with thermal expansion adiabatic apparatus - Google Patents
A kind of battery pack with thermal expansion adiabatic apparatus Download PDFInfo
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- CN209056524U CN209056524U CN201821162479.9U CN201821162479U CN209056524U CN 209056524 U CN209056524 U CN 209056524U CN 201821162479 U CN201821162479 U CN 201821162479U CN 209056524 U CN209056524 U CN 209056524U
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- battery
- module
- thermal expansion
- pack
- battery core
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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 relates to a kind of battery packs with thermal expansion adiabatic apparatus, which includes battery-pack exterior casing, and battery-pack exterior casing is provided with several battery cores, and the insulation sheath being made of thermal expansion material is coated with outside battery core.Wherein, several battery cores constitute multiple groups module, and each module includes at least two battery core；It by series connection and/or is connected in parallel between each battery core in module using connecting plate, multiple groups module by series connection and/or is connected in parallel using connecting plate；Thermal baffle is provided between adjacent block and between module and shell.The battery pack for having the advantages that thermally expand adiabatic apparatus of the utility model have it is light-weight, be insulated, be the long-life, corrosion resistant, avoid the problem that conventional thermal barrier material failure, meet the use of battery at various temperatures, improve battery security.
Description
Technical field
The utility model designs Li-ion batteries piles, in particular to a kind of battery pack with thermal expansion adiabatic apparatus.
Background technique
There is a crucial factor, normally in terms of environment temperature is for the service performance of lithium ion battery and service life at present
The operating temperature of lithium ion battery is 25~35 DEG C, when temperature is reduced to -30 DEG C or less, without the lithium ion under safeguard measure
It is even lower that cell discharge performance only has 50% under room temperature, and charges will be prohibited at this time, otherwise can cause the safety such as burning
Accident；In 55 DEG C of environment above of high temperature, due to the aggravation of internal chemical reaction rate, battery life will be greatly shortened, if
Rise to 90 DEG C or more, it is likely that safety accident occurs；When lithium ion battery overcharges, it is also easy explosion on fire.
In each application, Li-ion batteries piles generally use metal protection shell, use air cooling or liquid cooling side
Formula heat dissipation guarantees the safety of battery in use, but for the application under extreme condition, such as -40 DEG C or less and height
Application in warm (> 60 DEG C) environment, because metal heat conduction coefficient is high, battery can quickly change with environment temperature, not have still
Good mode guarantees, and in wet environment, salt mist environment, there are the hidden danger easy to aging being easily corroded for metal.
The intracorporal security protection of current battery shell is mainly carried out by the isolation of the bracket between module, it is meant that once
There is single battery (hereinafter referred to as battery core) that accident occurs, individual module carries out isolating and protecting, do not interfere with other modules, but this
Also result in two problems, first, the normal work of other multiple battery cores in the failure effect of single battery core single module, especially
Occur to directly result in single group when single thermal runaway and fail therewith；Second, the factor of heat transfer will lead to module adjacent thereto also with
It is impacted, may cause the reduction of service performance, other battery cores also led to when serious and are failed therewith.Using thermal expansion
Material, which carries out package to the battery core in battery pack, may be implemented protection to battery core, be not in that certain economize on electricity core goes wrong and leads to it
The problem of his battery core failure.
Lithium ion battery after having used conventional insulation material can satisfy use demand in a short time, but with battery
It generates heat-insulating material caused by deformation in use to be plastically deformed, the decline of later period using effect does not have insulation effect even
Fruit, the utility model patent improve the elasticity of heat-insulating material, have the characteristics that vertical, horizontal elasticity is close with extensibility, solve
Battery is insulated the problem of sheath failure.
Utility model content
The purpose of this utility model is that in order to solve the above problem, the utility model provides a kind of with thermal expansion adiabatic apparatus
Battery pack.
A kind of battery pack with thermal expansion adiabatic apparatus, which includes battery-pack exterior casing, and battery-pack exterior casing is built-in
There are several battery cores, the insulation sheath being made of thermal expansion material is coated with outside battery core.
Wherein, several battery cores constitute multiple groups module, and each module includes at least two battery core；Each battery core in module it
Between using connecting plate by series connection and/or be connected in parallel, multiple groups module using connecting plate by series connection and/or be connected in parallel；?
Thermal baffle is provided between adjacent block and between module and shell.
Wherein, battery-pack exterior casing includes box body and top blind flange, top blind flange top have battery anode connecting pin and
Cathode connecting pin.
Wherein, multiple groups module is arranged according to single layer, bilayer or multilayer, when bilayer or multilayer arranges, adjacent two layers module
Equipped with thermal baffle.
Wherein, multiple groups module monolayer alignment, each module include four battery cores, and four battery cores are first two-by-two by connecting copper bar
Parallel connection is connected again.
Wherein, module is coated with the electricity of insulation sheath by several of module housing and series connection with top blind flange
Core is constituted.
Wherein, several battery cores for being coated with insulation sheath are arranged according to single layer, bilayer or multilayer, bilayer or multilayer arrangement
When, thermal baffle is equipped between adjacent two layers battery core.
Wherein, battery-pack exterior casing includes heat conduction silicone.
Wherein, the heat-insulating material of insulation sheath and thermal baffle is used and is made according to the following material of mass percent meter:
Feather fiber 50~60%, binder butadiene-styrene rubber 25~35%, remaining is phenolic resin composition.
Wherein, the heat-insulating material of insulation sheath and thermal baffle is used and is made according to the following material of mass percent meter:
Feather fiber 55%, binder butadiene-styrene rubber 30%, remaining is phenolic resin composition.
Wherein, it is insulated sheath and the heat-insulating material of thermal baffle is made of the mixture of expanded graphite and resin.
The battery pack with thermal expansion adiabatic apparatus of the utility model have it is light-weight, be insulated, the long-life, corrosion-resistant
The advantages of, it avoids the problem that conventional thermal barrier material failure, meets the use of battery at various temperatures, improve cell safety
Property.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as practical to this
Novel limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Figures 1 and 2 show that according to the knot of the battery pack with thermal expansion adiabatic apparatus of the utility model embodiment
Structure schematic diagram；
Fig. 3 shows the structural schematic diagram of the module according to the utility model embodiment；
Fig. 4 shows the structural schematic diagram of the battery core for being equipped with insulation sheath according to the utility model embodiment；
Fig. 5 shows the structure of the battery pack with thermal expansion adiabatic apparatus according to another embodiment of the utility model
Schematic diagram.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to thoroughly understand the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened is fully disclosed to those skilled in the art.
The purpose of this utility model is to invent a kind of battery pack with thermal expansion adiabatic apparatus.
The utility model is by battery-pack exterior casing, several modules (hereinafter referred to as module) and copper bar, input/output interface etc.
Electrical connector composition, module are mounted in battery-pack exterior casing.Module is gone here and there by several battery cell batteries (hereinafter referred to as battery core)
It is formed in parallel.It is isolated between battery cell battery using thermal expansion material in module, thermal expansion insulation sheath is uniformly distributed
On each battery core surface.Between several modules and between module and battery housing also with thermal expansion material carry out every
From.It can also be directly loadable into battery-pack exterior casing by several battery cores, heat is used between battery core and between battery core and battery-pack exterior casing
Expanding material is isolated.
Input/output interface is installed, shell uses the amorphous thermal plastic of PPSU, as shell battery on battery-pack exterior casing
System degree of protection itself reaches IP68, acid and alkali resistance, alcohol, salt, aliphatic hydrocarbon, resistance to ionizing radiation, nontoxic and insulation and self-extinguishment
It is good, physical mechanical property and electrical property are kept in a wide range.Shell contains heat conduction silicone, guarantees that battery core uses temperature
Homogeneity.Battery-pack exterior casing contains relief valve.
By module (each module is made of in series and parallel several battery cores) and connector, protection inside battery-pack exterior casing
Plate, thermal expansion insulation sheath etc..The insulation sheath or thermal baffle constituted between battery core using thermal expansion material is isolated, by independence
Module housing assembling, forms circuit connection.It is relatively independent between module, with thermal expansion insulation sheath isolation, even if if one or
Dry Module Fail, even if electrical property is declined, still has certain electric discharge to use ability as long as other modules do not fail.
The problems such as thermal runaway occurs because of itself due to a battery core this avoid conventional batteries causes to occur a series of chain anti-
It answers, other battery cores is made to follow failure, function is caused to lose the serious consequence of even safety accident, cause personnel and economic damage
It loses.When necessary can also be series-parallel by several battery cores, it is directly loadable into battery-pack exterior casing, and between battery core and battery core and battery
With thermal expansion insulation sheath isolation between assembly housing, battery pack is constituted.
The utility model using thermal expansion material between battery core and battery core, battery core and module be (or outside battery core and battery pack
Between shell) and module and battery-pack exterior casing between be isolated, form insulation sheath or thermal baffle, can effectively eliminate single battery core
Or the function of entire battery pack caused by the thermal runaway of module loses and security risk.Thermal expansion material, which can use, to be coated, absolutely
Hot partition isolation or the modes such as isolated form chamber made of mold reach heat-insulated target.
Thermal expansion material is made of a kind of natural feather fiber thermal expansion material, by being processed into threadiness, with benefit
There is the bulkiness of excellent heat insulating ability and slim and graceful low-density itself with feather fiber, it is swollen to be capable of forming the good heat of heat-insulating property
Swollen material obtains thermal expansion material by heating the fiber extracted in binder and feather jointly.It is thermally expanded after heating
Material internal forms the coating with certain porosity, improves its heat-insulating property, which uses according to mass percent
The following material of meter is made: feather fiber 50~60%, binder butadiene-styrene rubber 25~35%, remaining is phenolic resin composition.
Best feather fiber accounting 55%, binder butadiene-styrene rubber 30%, remaining is phenolic resin composition.
Thermal expansion material can also be made of the mixture of expanded graphite and resin, which must not be used for battery core and module
The surface for installing electrode and copper bar, as it is possible that causing short circuit, but the formula heating conduction is preferable.
Thermal expansion material has biggish elasticity and extensibility, and alleviation battery core charge and discharge can be transmitted in use process and are brought
Pressure change.Natural organic matter has environment-friendly advantage simultaneously, and discharge harmful substance is few when such as burning, for special dimension application
As aerospace confined space, underwater submarine and the product for civilian use required with high security are of great significance.Together
When material itself it is environmentally friendly, can degrade and prevent the pollution of the environment in soil.The thermal expansion material can be acute when encountering flame or high temperature
It is strong expanded foamed, so that filler is formed the extremely low refractory insulating layer of thermal conductivity, blocks battery core interval, hole, between structural member
Gap makes each component that can withstand flame impingement at the appointed time, to prevent heat from sharply spreading and fire and smoke spread to reach
To the purpose of fireproof blocking, battery set product is not allowed to damage the person.It is resistance to after battery core surface sprays this material through detecting
Fiery integrality can reach 30 minutes, and it is resistance to that thermal expansion index performance expansion rate >=160%, 100 DEG C at 200 DEG C can reach 130%
Humid is -30 degree in minimum low temperature at 120 hours or more, maximum temperature be can be born in 55 degree of temperature cycles 15 times with
On circulation.The present invention battery system application, can hole, gap fireproof plugging in junction, in normal use temperature
Hole is left when spending between battery core to guarantee to radiate, good air-tightness, waterproofness are realized when there is thermal runaway.
The utility model passes through absorption battery core inside complex-shaped battery modules by the use of thermal expansion material
The heat generated when abnormal, thermal expansion material expand, by the dilatancy of thermal expansion material that module or battery core is thorough
It covers, is formed barrier component (will not be expanded when normal use), reach and be reliably sealed in battery core and its housing parts, thus real
Now insulation, anoxybiotic protect the safety of user in the possibility for fundamentally preventing battery core and burning away.Meanwhile the heat of this material is swollen
Swollen rate is more than 200%, will not cause to fail that battery core is completely covered because of expansion rate deficiency, will not collapse at relatively high temperatures；
Fast speed is thermally expanded simultaneously, speed of expansion will not be caused to slow down because of the factor of delay, cannot covered in time.Since material has
There is light-weighted advantage, will not lose battery energy density because of the addition of thermal expansion material and excessive bear is caused to user
Load.
In conjunction with the above-mentioned description to the utility model embodiment and test it is found that compared with the existing technology, this is practical new
The cell stack designs of type have it is following the utility model has the advantages that 1) battery core normal use when, insulation sheath alleviate battery core between expansion, absorb
Deformation pressure extends the service life；2) when short circuit occurs for battery core section, thermal expansion layer can be by absorbing heat for battery core surface and tab
Position covers all, and forms the thermal insulation layer of the extremely low insulation of thermal conductivity to protect user safe；3) battery-pack exterior casing shell is adopted
It is designed with IP68, shell contains heat conduction silicone, guarantees that battery core uses temperature uniformity.
The utility model battery pack application, can hole, gap fireproof plugging in junction, in normal use temperature
Hole is left when spending between battery core to guarantee to radiate, good air-tightness, waterproofness are realized when there is thermal runaway.It uses
The battery of thermal expansion layer, the control of capacity retention ratio, battery core temperature in cyclic process and the heat after certain economize on electricity core short circuit
Battery temperature under runaway condition, which has, to be obviously improved, and has ensured the safety of use process, extends and abnormal escape occurs
Time, thermal expansion layer itself, which is also possible to prevent propagation of flame, causes battery core that explosive combustion occurs.
The utility model is characterized in that: the use of 1, insulation sheath thoroughly solves between battery, temperature is inconsistent, external
The problems such as too low bring battery performance of temperature declines, while the structure of anoxybiotic further enhances battery security.2, battery
Assembly housing uses, heat resistance splendid material PPSU more better than common metal shell machinery and corrosion resistance, heat resisting temperature
Up to 207 degree, and resistance to thermal oxide, creep-resistant property is excellent, and resistance to ionizing radiation, itself is nontoxic, and insulating properties and self-extinguishment are good.3,
Internal battery pack is mounted with several insulation sheaths between module and battery core, not only more than traditional insulation sheath insulation effect
Height, light-weight, insulation sheath failure caused by the effective deformation reduced in battery use, using module and battery core and battery pack
Dual insulation between shell more efficiently solves the problems, such as chain reaction caused by monomer failure.4, the normal charge and discharge of battery core follows
There can be certain swelling stress with charge and discharge when ring, inside battery core, battery core is with expansion or shrinkage, the heat filled between battery core
Expanding material can absorb the stress of battery core expansion, avoids that excessive pressure extrusion is caused to cause to deform between battery core, extends and uses
Service life；5, when certain economize on electricity core failure, the heat of generation is by thermal expansion layer absorption, while thermal expansion layer is by the module or battery core
It gradually covers, heat is avoided quickly to be transferred to other modules or battery core, the risk for causing other battery cores to fail therewith is prevented into one
The severity of step aggravation thermal runaway.
As shown in Figure 1, FIG. 1 to FIG. 4 is a kind of implementation of utility model, i.e., module, module peace are assembled by battery core
In battery housing structure.
Referring to Fig. 1 and Fig. 2, in order to more clearly show the structure of battery pack, battery pack upper cover plate, two modules are omitted
2 are mounted in battery-pack exterior casing 1, between module 2 and battery-pack exterior casing 1 by 2 side thermal baffles 6, upper thermal baffle 6, it is lower absolutely
Hot partition 6 and two pieces of front and back thermal baffles 6 are isolated, wherein upper thermal baffle 6 by module 2 and battery pack upper cover (being omitted in figure) every
From.Battery-pack exterior casing 1 is preferred using the amorphous thermal plastic of PPSU, and shell contains heat conduction silicone, guarantees that battery core uses
Temperature uniformity, battery-pack exterior casing contain relief valve.Module number can be worked as according to the quantity for needing to increase module of battery pack
When more, can also module be set to bilayer or multilayer structure, at this moment, it should which thermal baffle is installed between the layers.
Referring to Fig. 3, Fig. 3 is the structure of module 2, in order to more clearly show, removes module upper cover plate, 4 pieces of band insulation shields
The battery core 11 of layer, simultaneously two series windings connect 13,4 pieces of 11 liang of sheath battery cores of band insulation of load module shell, 2 pieces of left side band insulation shield in figure
Layer battery core 11 in parallel is one group, and 2 pieces of the right band insulation sheath battery core 11 in parallel is one group, and with long connecting copper bar 8 by two groups
Series connection is exported by module negative 10 and module anode 14.Band insulation sheath battery core 11 in module 2 can according to requiring to increase and decrease,
Connection with insulation sheath battery core 11 can also be only serial or parallel.
It is with the structure inside insulation sheath battery core 11 referring to Fig. 4, Fig. 4, the outside of battery core passes through coating heat insulation layer, insulation
The jacket that plate isolation or the isolated form chamber made of mold are constituted, keeps battery core 11 and other battery cores heat-insulated.It is insulated sheath heat dissipation
Closing, at high temperature since insulation sheath 16 expands, is insulated sheath heat release hole 18, avoids failing by hole 18 convenient for the heat dissipation of battery core 11
Battery core 11 transfer heat to other battery cores, when using formula based on expanded graphite, insulation sheath can be not provided with and dissipated
Hot hole 18.
Referring to Fig. 5, Fig. 5 is another implementation of utility model, i.e., will be in multiple bands insulation 11 figure of sheath battery core
8 pieces are directly loadable into battery-pack exterior casing 1, are connected by short connecting copper bar 8, defeated by battery electrode 7 and battery anode 9
Out.Since band insulation sheath battery core 11 is already provided with insulation sheath, so between insulation sheath battery core 11 and battery-pack exterior casing 1
Sheath is insulated without setting, but tops and the battery pack upper cover of 8 pieces of band insulation sheath battery cores 11 be to show structure, in figure
There should be insulation sheath between falling, first is that in order to insulate, second is that just in case short 8 short circuit thermal of connecting copper bar, can completely cut off heat biography
It is delivered to outside battery pack.The quantity with insulation sheath battery core 11 can be increased according to the needs of battery pack, when band insulation sheath electricity
When 11 quantity of core is more, also multiple bands can be insulated sheath battery core 11 and be set as bilayer or multilayer structure, at this moment, it should in layer and layer
Between thermal baffle is installed.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in
Change or replacement, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with
Subject to the scope of protection of the claims.
Claims (7)
1. a kind of battery pack with thermal expansion adiabatic apparatus, which is characterized in that the battery pack includes battery-pack exterior casing (1),
Battery-pack exterior casing (1) is provided with several battery cores (11), is coated with the insulation being made of thermal expansion material outside the battery core (11)
Sheath (16)；
Several battery cores constitute multiple groups module (2), and each module (2) includes at least two battery core (11)；In the module (2)
Each battery core (11) between by series connection and/or be connected in parallel using connecting plate, the multiple groups module (2) is logical using connecting plate
It crosses and connects and/or be connected in parallel；It is provided with thermal baffle (6) between adjacent block (2) and between module (2) and shell.
2. the battery pack with thermal expansion adiabatic apparatus as described in claim 1, which is characterized in that
The battery-pack exterior casing includes box body and top blind flange, and the top blind flange top has battery anode connecting pin (9)
With cathode connecting pin (7).
3. the battery pack with thermal expansion adiabatic apparatus as described in claim 1, which is characterized in that
The multiple groups module is arranged according to single layer, bilayer or multilayer, and when bilayer or multilayer arranges, adjacent two layers module is equipped with exhausted
Hot partition (6).
4. the battery pack with thermal expansion adiabatic apparatus as described in claim 1, which is characterized in that
Multiple groups module (2) monolayer alignment, each module (2) include four battery cores (11), and four battery cores pass through connecting copper bar
It is first in parallel two-by-two to connect again.
5. the battery pack with thermal expansion adiabatic apparatus as described in claim 1, which is characterized in that
The module (2) is coated with insulation sheath by several of module housing (13) and series connection with top blind flange
(16) the battery core (11) is constituted.
6. the battery pack with thermal expansion adiabatic apparatus as claimed in claim 5, which is characterized in that
Several battery cores (11) for being coated with insulation sheath are arranged according to single layer, bilayer or multilayer, bilayer or multilayer arrangement
When, thermal baffle (6) are equipped between adjacent two layers battery core.
7. the battery pack with thermal expansion adiabatic apparatus as described in claim 1, which is characterized in that
The battery-pack exterior casing (1) includes heat conduction silicone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821162479.9U CN209056524U (en) | 2018-07-20 | 2018-07-20 | A kind of battery pack with thermal expansion adiabatic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821162479.9U CN209056524U (en) | 2018-07-20 | 2018-07-20 | A kind of battery pack with thermal expansion adiabatic apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN209056524U true CN209056524U (en) | 2019-07-02 |
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ID=67046798
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821162479.9U Active CN209056524U (en) | 2018-07-20 | 2018-07-20 | A kind of battery pack with thermal expansion adiabatic apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397829A (en) * | 2020-11-13 | 2021-02-23 | 深圳市比亚迪锂电池有限公司 | Module with high flame retardance and high heat resistance and preparation method |
| CN113851780A (en) * | 2020-06-10 | 2021-12-28 | 华为数字能源技术有限公司 | Battery, electric vehicle and electronic equipment |
| CN114270597A (en) * | 2020-02-17 | 2022-04-01 | 株式会社Lg新能源 | Battery module having structure capable of delaying outflow of fire-fighting water injected therein in case of fire, and battery rack and energy storage device including the same |
| CN116345020A (en) * | 2021-12-23 | 2023-06-27 | 比亚迪股份有限公司 | Battery and battery pack |
-
2018
- 2018-07-20 CN CN201821162479.9U patent/CN209056524U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114270597A (en) * | 2020-02-17 | 2022-04-01 | 株式会社Lg新能源 | Battery module having structure capable of delaying outflow of fire-fighting water injected therein in case of fire, and battery rack and energy storage device including the same |
| CN114270597B (en) * | 2020-02-17 | 2024-04-12 | 株式会社Lg新能源 | Battery module, battery rack and energy storage device |
| CN113851780A (en) * | 2020-06-10 | 2021-12-28 | 华为数字能源技术有限公司 | Battery, electric vehicle and electronic equipment |
| CN112397829A (en) * | 2020-11-13 | 2021-02-23 | 深圳市比亚迪锂电池有限公司 | Module with high flame retardance and high heat resistance and preparation method |
| CN116345020A (en) * | 2021-12-23 | 2023-06-27 | 比亚迪股份有限公司 | Battery and battery pack |
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