CN210403969U - Buffer structure and power battery module comprising same - Google Patents
Buffer structure and power battery module comprising same Download PDFInfo
- Publication number
- CN210403969U CN210403969U CN201921313683.0U CN201921313683U CN210403969U CN 210403969 U CN210403969 U CN 210403969U CN 201921313683 U CN201921313683 U CN 201921313683U CN 210403969 U CN210403969 U CN 210403969U
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- layer
- pcm
- frame
- heat
- buffer structure
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- 239000000443 aerosol Substances 0.000 claims abstract description 35
- 238000005538 encapsulation Methods 0.000 claims description 9
- 239000004964 aerogel Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 229920002379 silicone rubber Polymers 0.000 claims 1
- 239000004945 silicone rubber Substances 0.000 claims 1
- 238000009792 diffusion process Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 6
- 239000003063 flame retardant Substances 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 6
- 230000003139 buffering effect Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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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- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a buffer structure, include aerosol layer and be located the PCM structural layer of aerosol layer both sides. The buffer structure can reduce the heat conduction of the buffered device, keep the temperature stable, prevent the heat diffusion and slow down the speed of thermal runaway. This application still provides a power battery module that contains above-mentioned buffer structure, and this power battery module can prevent acutely to produce heat and the condition of quick thermal diffusion between the electric core, keeps the stability of electric core temperature, under buffer structure's effect, completely cuts off the electric core taking place the thermal runaway one end with the heat for chain thermal runaway reaction can not take place for other electric cores in the module, can ensure normal work even.
Description
Technical Field
The utility model relates to a power battery module technical field, more specifically relate to a buffer structure and contain this buffer structure's power battery module.
Background
The power battery module generally comprises 2 at least electric cores, and electric core has the inflation of certain size in the use, for this dimensional change of buffering, often uses the silica gel frame interval between the electric core, and the electric core charges the back, stores great energy, when certain electric core takes place danger, if: short circuit, fire or explosion can produce a large amount of heat, smog, fire or explosive after the incident takes place, often can spread surrounding electric core for chain reaction takes place, arouses bigger harm, and this kind of harm is called thermal runaway, in order to reduce, stop this kind of thermal runaway incident's emergence, often use the aerosol spacer in order to prevent that the heat of electric core from spreading away between electric core and electric core. However, the structure using the aerosol spacer has the following drawbacks:
(1) the validity period of the aerosol spacer is less than 4 years, and the quality assurance of the automobile parts needs more than 5 years.
(2) The aerosol spacer composition contains substances that are at risk of electrical conduction.
(3) Aerosol spacers are less elastically deformable.
(4) The aerosol spacer can insulate the module but does not allow for heat absorption and temperature control.
Therefore, it is necessary to provide a buffering structure and a power battery module including the same to solve the above-mentioned deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a buffer structure for preventing thermal diffusion and reducing thermal runaway rate.
The second objective of the present invention is to provide a power battery module with the above-mentioned buffering structure, which can effectively reduce the heat conduction between the battery cells and control the temperature stability of the battery cells.
In order to achieve the above object, the utility model provides a buffer structure, include aerosol layer and be located the PCM structural layer of aerosol layer both sides.
Compared with the prior art, the utility model discloses a buffer structure includes aerosol layer and is located the PCM structural layer of aerosol layer both sides. The PCM structure layer is non-conductive, has the characteristic of absorbing heat and releasing heat to generate physical deformation, generates expansion deformation when absorbing heat, shrinks in volume when releasing heat, can reduce the heat conduction of a buffered device, keeps the temperature stability of the buffered device, prevents heat diffusion and slows down the thermal runaway occurrence speed. Particularly, after the PCM structural layer absorbs partial heat, the volume of the PCM structural layer is expanded and deformed, and the heat insulation performance of the aerosol layer can be improved.
Preferably, the buffer structure further comprises a frame with a hollow structure, and the aerosol layer and the two PCM structure layers are located in the frame.
Preferably, the frame is of a resilient construction.
Preferably, the buffer structure further comprises two packaging layers located outside the two PCM structural layers, and the two packaging layers are used for packaging the aerosol layer and the two PCM structural layers in the frame.
Preferably, the encapsulation layer includes a protrusion protruding toward one side of the PCM structure layer, and the aerosol layer and the two PCM structure layers are located between the two protrusions.
Preferably, the encapsulation layer further includes a lug portion connected to the protruding portion, and the two lug portions and the two protruding portions form a mounting area for mounting the frame.
Preferably, the PCM structure layer is selected from a PCM plastic structure layer or a PCM metal structure layer.
Preferably, the frame is an ethylene propylene diene monomer frame or a silica gel frame.
Preferably, the packaging layer adopts a PI film layer.
The application also provides a power battery module, including two at least electric cores and being located two above-mentioned buffer structure between the electric core.
By utilizing the heat absorption and release characteristics of the PCM structure layer, partial heat can be absorbed when the electric core is out of control due to heat, and the rising speed of the heat of the electric core is reduced. When the temperature is reduced, the PCM structure layer gradually releases the stored heat energy to heat the battery core, and the power burden required by the heating film is reduced. When thermal runaway occurs, the PCM structure layer expands rapidly, the flame-retardant area is increased, and the flame-retardant effect is improved. The aerosol layer has heat-proof quality, completely cuts off the electric core of taking place thermal runaway one end with the heat under the combined action of aerosol layer and PCM structural layer for other electric cores in the module can not take place chain thermal runaway reaction and normal work even. Therefore, the power battery module can prevent the situation that heat is generated violently between the electric cores and the heat is diffused quickly, and the stability of the temperature of the electric cores is kept.
The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings which illustrate embodiments of the invention.
Drawings
Fig. 1 is a schematic structural diagram of the buffering structure of the present invention.
Fig. 2 is an exploded view of the cushioning structure shown in fig. 1.
Fig. 3 is a schematic structural diagram of an encapsulation layer in the buffer structure shown in fig. 2.
Fig. 4 is a cross-sectional view taken at a-a in fig. 1.
Fig. 5 is a cross-sectional view at B-B in fig. 1.
Fig. 6 is an enlarged view at C in fig. 5.
Fig. 7 is a schematic structural diagram of the power battery module of the present invention.
Description of the element reference numerals
The power battery module 100, the buffer structure 10, the aerosol layer 11, the PCM structure layer 13, the frame 15, the encapsulation layer 17, the protruding portion 171, the lug part 173, the mounting region 18, and the battery cell 30.
Detailed Description
Referring to fig. 1-2, the buffer structure 10 of the present invention includes an aerosol layer 11 and a PCM structure layer 13 located on both sides of the aerosol layer 11. The aerosol layer 11 has heat insulation performance, and the PCM structural layer 13 is a phase change material, is non-conductive, and expands in volume when absorbing heat and contracts in volume when releasing heat. The PCM structural layer 13 is used for absorbing heat, and the speed of thermal runaway is reduced. The PCM structure layer 13 absorbs heat to expand, so that the flame-retardant area can be increased, the flame-retardant effect is improved, and thermal diffusion is prevented. The PCM structure layer 13 and the aerosol layer 11 act together to isolate heat at one end where thermal runaway occurs, and linkage thermal runaway reaction cannot occur. The PCM structure layer 13 may be a PCM plastic structure layer or a PCM metal structure layer (e.g., a PCM metal sheet).
Referring to fig. 2-6, the buffer structure 10 further includes a frame 15 having a hollow structure, and the aerosol layer 11 and the two PCM structure layers 13 are disposed in the frame 15. The aerosol layer 11 and the two PCM structural layers 13 are positioned in the hollow structure of the frame 15 to protect the aerosol layer 11 and the two PCM structural layers 13 from being pressed, and the service life of the aerosol layer 11 and the two PCM structural layers 13 is prolonged. The frame 15 is in a shape of a ring or a square, and the like, which is not limited herein. Further, the frame 15 is an elastic structure, and the frame 15 is an ethylene propylene diene monomer frame or a silica gel frame, for example, the frame 15 made of a silica gel material or a rubber material.
With continued reference to fig. 2-6, the buffer structure 10 further includes two encapsulation layers 17 located outside the two PCM structure layers 13, and the two encapsulation layers 17 encapsulate the aerosol layer 11 and the two PCM structure layers 13 in the frame 15, so that the buffer structure 10 is more stable. The packaging layer 17 is a PI film layer, and for example, the packaging layer 17 can be made of a PI film (polyimide film) and has excellent insulating properties. Further, the encapsulating layer 17 includes a protrusion 171 protruding toward one side of the PCM structure layer 13 and a lug portion 173 connected to the protrusion 171, the aerosol layer 11 and the two PCM structure layers 13 are located between the two protrusions 171, and the two lug portions 173 and the two protrusions 171 form the mounting region 18 of the mounting frame 15, so that the whole cushioning structure 10 is compact and stable.
Referring to fig. 7, the present application further provides a power battery module 100, which includes at least two battery cells 30 and the above-mentioned buffering structure 10 located between the two battery cells 30. The buffer structure 10 can effectively reduce the heat conduction between the battery cells 30, and can control the temperature stability of the battery cells 30. Specifically, by utilizing the heat absorption and release characteristics of the PCM structure layer 13, a part of heat can be absorbed when the battery cell 30 is thermally out of control, so that the rising speed of the heat of the battery cell 30 is reduced. When the temperature is lowered, the PCM structural layer 13 gradually releases the stored heat energy to heat the battery cell 30, thereby reducing the power load required for heating the film. When thermal runaway occurs, the PCM structural layer 13 expands rapidly, the flame retardant area of the PCM structural layer 13 is increased, and the flame retardant effect is improved. The aerosol layer 11 has heat-proof quality, and is isolated the electric core 30 of taking place thermal runaway one end with the heat under the combined action of aerosol layer 11 and PCM structural layer 13 for chain thermal runaway reaction can not take place for other electric cores 30 in the module, ensures power battery module 100 and normally works even. Therefore, the power battery module 100 can prevent rapid thermal diffusion caused by intense heat generation between the battery cells 30, and maintain the temperature stability of the battery cells 30.
Compared with the prior art, the utility model discloses a buffer structure 10 includes aerosol layer 11 and is located the PCM structural layer 13 of aerosol layer 11 both sides. The PCM structure layer 13 is non-conductive, has the characteristics of absorbing heat and releasing heat to generate physical deformation, generates expansion deformation when absorbing heat, shrinks in volume when releasing heat, can reduce the heat conduction of a buffered device, keeps the temperature stable, prevents heat diffusion and slows down the thermal runaway occurrence speed. In particular, after the PCM structural layer 13 absorbs part of the heat, the volume of the PCM structural layer is expanded and deformed, so that the heat insulation performance of the aerogel layer 11 can be improved.
The present invention has been described above with reference to the preferred embodiments, but the present invention is not limited to the above-disclosed embodiments, and various modifications, equivalent combinations, which are made according to the essence of the present invention, should be covered.
Claims (10)
1. A buffer structure is characterized by comprising an aerosol layer and PCM structure layers positioned on two sides of the aerosol layer.
2. The cushioning structure of claim 1, further comprising a frame having a hollow structure, wherein said aerogel layer and said two PCM structural layers are located within said frame.
3. The cushioning structure of claim 2, wherein said frame is of resilient construction.
4. The cushion structure of claim 2, further comprising two encapsulating layers located outside the two PCM structural layers, the two encapsulating layers encapsulating the aerogel layer and the two PCM structural layers within the frame.
5. The buffer structure of claim 4, wherein the encapsulation layer includes a protrusion protruding toward one side of the PCM structure layer, and the aerogel layer and the two PCM structure layers are located between the two protrusions.
6. The cushioning structure of claim 5, wherein said encapsulation layer further comprises a tab portion connected to said boss portion, said tab portion and said boss portion forming a mounting area for mounting said frame.
7. The cushioning structure of claim 1, wherein said PCM structural layer is selected from a PCM plastic structural layer or a PCM metal structural layer.
8. The cushioning structure of claim 3, wherein said frame is an ethylene propylene diene monomer frame or a silicone rubber frame.
9. The buffer structure of claim 4, wherein the encapsulation layer is a PI film layer.
10. A power battery module, characterized by comprising at least two battery cells and the buffer structure of any one of claims 1-9 located between the two battery cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921313683.0U CN210403969U (en) | 2019-08-13 | 2019-08-13 | Buffer structure and power battery module comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921313683.0U CN210403969U (en) | 2019-08-13 | 2019-08-13 | Buffer structure and power battery module comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210403969U true CN210403969U (en) | 2020-04-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921313683.0U Active CN210403969U (en) | 2019-08-13 | 2019-08-13 | Buffer structure and power battery module comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210403969U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021093581A1 (en) * | 2019-11-15 | 2021-05-20 | 宁德时代新能源科技股份有限公司 | Battery box, fabrication method therefor and apparatus containing battery box |
| EP4181290A4 (en) * | 2020-10-27 | 2024-07-17 | Lg Energy Solution Ltd | Battery module and battery pack including same |
-
2019
- 2019-08-13 CN CN201921313683.0U patent/CN210403969U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021093581A1 (en) * | 2019-11-15 | 2021-05-20 | 宁德时代新能源科技股份有限公司 | Battery box, fabrication method therefor and apparatus containing battery box |
| US11799153B2 (en) | 2019-11-15 | 2023-10-24 | Contemporary Amperex Technology Co., Limited | Battery casing, method for manufacturing the same, and device containing battery casing |
| EP4181290A4 (en) * | 2020-10-27 | 2024-07-17 | Lg Energy Solution Ltd | Battery module and battery pack including same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220218 Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zenergy Battery Technologies Co.,ltd Address before: 210000 249 Lantian Road, Airport Economic Development Zone, Jiangning District, Nanjing City, Jiangsu Province Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |