CN214411321U - Thermal runaway prevention soft package battery module - Google Patents
Thermal runaway prevention soft package battery module Download PDFInfo
- Publication number
- CN214411321U CN214411321U CN202120473638.2U CN202120473638U CN214411321U CN 214411321 U CN214411321 U CN 214411321U CN 202120473638 U CN202120473638 U CN 202120473638U CN 214411321 U CN214411321 U CN 214411321U
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- Prior art keywords
- thermal runaway
- cover plate
- plate
- battery module
- package battery
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- 230000002265 prevention Effects 0.000 title claims abstract description 18
- 239000006260 foam Substances 0.000 claims abstract description 19
- 239000010445 mica Substances 0.000 claims abstract description 9
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 9
- 239000002390 adhesive tape Substances 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000008358 core component Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000000429 assembly Methods 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 17
- 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 7
- 239000003063 flame retardant Substances 0.000 description 7
- 229920000297 Rayon Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004964 aerogel Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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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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- Battery Mounting, Suspending (AREA)
Abstract
The utility model provides a thermal runaway prevention soft package battery module, which comprises a battery cell assembly, an upper cover plate, a lower cover plate and end plates positioned at two ends of the battery cell assembly; the battery core assembly is formed by stacking a plurality of soft-packaged battery cores in the thickness direction, each two soft-packaged battery cores are a battery core assembly, and an inner protection plate is arranged between every two adjacent battery core assemblies; two outer protective plates are respectively arranged on the two outer sides of the electric core component; the inner protection plate and the outer protection plate are the same in structure and comprise foam layers, and mica sheets are pasted on two side faces of each foam layer through double-faced adhesive tapes respectively. Therefore the utility model discloses well laminate polymer core module has adopted inside and outside guard plate and PLASTIC LAMINATED, can the pertinence seal live battery thermal runaway's propagation path. Meanwhile, the battery cell edge sealing and the fireproof layers on the upper cover plate and the lower cover plate are adopted, so that double protection is achieved, the protection coverage range is wide, and the protection effect is good.
Description
Technical Field
The utility model belongs to the technical field of lithium ion battery, concretely relates to soft-packaged battery module of thermal runaway is prevented.
Background
As the national requirements for the endurance mileage of electric vehicles are continuously increased, more strict requirements for the energy density of batteries are also put forward. Ternary pouch batteries have received increasing attention due to their higher energy density. However, high energy density also brings high safety risk, and the thermal runaway requirement of the ternary soft package module is more and more strict.
At present, the thermal runaway of the battery is delayed by mainly adding an isolation material between electric cores, and two schemes are mainly adopted: firstly, flame-retardant foam is added between the soft-package batteries for isolation, although the foam can meet the requirements of pretightening force and absorption expansion of the soft-package battery core, when thermal runaway occurs, the foam structure can be collapsed, and the effect of delaying the thermal runaway cannot be achieved; secondly, a technical route of a square shell module is adopted, and aerogel is used for delaying thermal runaway; however, unlike the square-shell cell, the soft-packed cell requires a relatively stable pre-tightening force during the cycling process. The defects of poor compression performance, insufficient corresponding pretightening force and poor expansion adaptability of the aerogel are particularly remarkable.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a thermal runaway guard plate of soft-packaged electrical core plays the effect of absorption inflation and thermal runaway prevention simultaneously.
The utility model discloses a concrete technical scheme as follows:
a thermal runaway prevention soft package battery module comprises a battery core assembly, an upper cover plate, a lower cover plate and end plates positioned at two ends of the battery core assembly; the battery core assembly is formed by stacking a plurality of soft-packaged battery cores in the thickness direction, each two soft-packaged battery cores are a battery core assembly, and an inner protection plate is arranged between every two adjacent battery core assemblies; two outer protective plates are respectively arranged on the two outer sides of the electric core component;
the inner protection plate and the outer protection plate are the same in structure and comprise foam layers, and mica sheets are pasted on two side faces of each foam layer through double-faced adhesive tapes respectively.
In a further scheme, two side edges of the upper cover plate are provided with lower buckling edges bent downwards, and two side edges of the lower cover plate are provided with upper buckling edges bent upwards; the outer side wall of the lower buckling edge is provided with at least two grooves, and the inner side wall of the upper buckling edge is fixedly provided with a convex block matched with the grooves; the lower buckling edge and the upper buckling edge are positioned through the groove and the convex block and then are connected in a welding mode.
The utility model discloses an upper and lower apron is fixed a position through recess, lug, and the corresponding position department that down presses down the apron promptly from the last upper cover plate advances, and recess, lug cooperate the location, and the location when guaranteeing the assembly, and then have guaranteed welding efficiency.
In a further scheme, an adhesive tape is adhered to the top edge of the outer side wall of the outer protection plate.
According to the further scheme, a fireproof plate is arranged between the upper cover plate and the electric core assembly, flanges are arranged on two side edges of the fireproof plate, and the flanges are bonded with the top end of the outer protection plate.
The turn-ups on the PLASTIC LAMINATED promptly bonds with the viscose area on the outer guard plate, prevents that open flame from the welding area blowout of upper cover plate with apron down, blocks the contact of air and electric core out of control simultaneously.
In a further scheme, two sides of the inner protection plate are respectively bonded on the adjacent electric core groups. The inner protection plate between the cell groups can adopt a copying structure design, can be well matched with the insulation plates at two ends, protects the soft package cell to the maximum extent, and blocks the thermal runaway propagation path.
In a further scheme, a fireproof coating is sprayed at the edge sealing position of the soft package battery cell. The double-insurance of preventing thermal runaway is realized by matching the double-insurance with the inner protection plate and the outer protection plate.
Further scheme, the inside wall of upper cover plate, lower apron all is equipped with fire protection coating, further improves fire prevention protection.
In a further scheme, an insulating plate is arranged between the end plate and the electric core assembly, an exhaust channel is formed in the end plate, and the total area of the exhaust channel is not less than 1800mm2. When the thermal runaway of the soft-package battery cell occurs, the exhaust channel is the only outlet, so that the whole package can be conveniently subjected to corresponding prevention and control, and the large-area exhaust channel can ensure the heat exchange rate.
Therefore the utility model discloses well laminate polymer core module has adopted inside and outside guard plate and PLASTIC LAMINATED, can the pertinence seal live battery thermal runaway's propagation path. Meanwhile, the battery cell edge sealing and the fireproof layers on the upper cover plate and the lower cover plate are adopted, so that double protection is achieved, the protection coverage range is wide, and the protection effect is good.
Additionally, the utility model provides an interior, outer guard plate can compromise the work demand under the thermal-insulated two kinds of operating modes of normal atmospheric temperature electric core circulation and thermal runaway. The space and the more stable circulation pretightning force of breathing inflation are given soft-packaged electrical core under the normal state. When thermal runaway occurs, the mica sheets can prevent fire and resist flame impact. The foam layer and the flame-retardant substance of the double-sided adhesive layer form a loose and porous shape at high temperature, so that a heat insulation layer is formed to block heat transfer.
Drawings
Figure 1 is a schematic structural diagram of the present invention,
figure 2 is an exploded view of the inner fender of figure 1,
in the figure: 1-upper cover plate, 11-groove; 2-fireproof plate, 3-insulating plate, 4-end plate, 51-outer protective plate, 52-inner protective plate, 53-adhesive tape, 54-foam layer, 55-double glue layer and 56-mica sheet; 6-soft package battery core, 7-lower cover plate and 71-lug.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention.
As shown in fig. 1-2, a thermal runaway prevention soft package battery module comprises a battery core assembly, an upper cover plate 1, a lower cover plate 7 and end plates 4 positioned at two ends of the battery core assembly; the battery core assembly is formed by stacking a plurality of soft-package battery cores 6 in the thickness direction, each two soft-package battery cores 6 are battery core groups, and an inner protection plate 52 is arranged between every two adjacent battery core groups; two outer protective plates 51 are respectively arranged at the two outer sides of the electric core assembly;
the inner protection plate 52 and the outer protection plate 51 are identical in structure and respectively comprise a foam layer 54, and mica sheets 56 are adhered to two side faces of the foam layer 54 through a double-faced adhesive tape 55.
The foam layer in the embodiment is made of flame-retardant foam, so that the flame-retardant effect is achieved; when the foam layer is melted and combusted, a loose and porous structure can be formed, and the foam layer is matched with the mica sheet to form a fireproof heat-insulating layer.
In a further scheme, two side edges of the upper cover plate 1 are provided with lower buckling edges bent downwards, and two side edges of the lower cover plate 7 are provided with upper buckling edges bent upwards; the outer side wall of the lower buckling edge is provided with at least two grooves 11, and the inner side wall of the upper buckling edge is fixedly provided with a convex block 71 matched with the grooves 11; the lower buckling edge and the upper buckling edge are positioned through the groove 11 and the convex block 71 and then are connected in a welding mode.
Further, an adhesive tape 53 is adhered to the top edge of the outer side wall of the outer protection plate 51.
Further, a fireproof plate 2 is arranged between the upper cover plate 1 and the electric core assembly, flanges are arranged on two side edges of the fireproof plate 2, and the flanges are bonded with the top end of the outer protection plate 51.
The turn-ups on the PLASTIC LAMINATED promptly bonds with the viscose area on the outer guard plate, prevents that open flame from the welding area blowout of upper cover plate with apron down, blocks the contact of air and electric core out of control simultaneously.
Further, two sides of the inner protection plate 52 are respectively adhered to the adjacent cell groups. The inner protection plate between the cell groups can adopt a copying structure design, can be well matched with the insulation plates at two ends, protects the soft package cell to the maximum extent, and blocks the thermal runaway propagation path.
In a further scheme, a fireproof coating is sprayed at the edge sealing position of the soft package battery cell 6. The double-insurance of preventing thermal runaway is realized by matching the double-insurance with the inner protection plate and the outer protection plate.
Further scheme, the inside wall of upper cover plate 1, lower apron 7 all is equipped with fire protection coating, further improves fire prevention protection.
Further scheme, be equipped with insulation board 3 between end plate 4 and the electric core subassembly, the exhaust passage has been seted up on end plate 4, and the exhaust passage area is not less than 1800mm2. When the thermal runaway of the soft-package battery cell occurs, the exhaust channel is the only outlet, so that the whole package can be conveniently subjected to corresponding prevention and control, and the large-area exhaust channel can ensure the heat exchange rate.
The utility model discloses set up inside and outside guard plate, can compromise the work demand under two kinds of operating modes of normal atmospheric temperature electricity core circulation and thermal runaway thermal-insulated. The space and the more stable circulation pretightning force of breathing inflation are given soft-packaged electrical core under the normal state. When a certain electric core group in the middle of the soft package battery module is heated and ignited, the mica sheets on the outer side in the outer protection plate can block flame impact, the foam layer in the middle can melt and burn, and the rest flame retardant in the foam layer forms a loose and porous structure and is matched with the mica sheets to form a fireproof heat insulation layer; and then a first layer of protection for preventing the thermal runaway of the battery core is formed by matching with the fireproof plate at the top end of the battery core. In addition, survey the wall in soft-packaged electrical core banding position and the upper and lower apron and all sprayed the flame retardant coating, when electric core banding department catches fire, the flame retardant coating of electric core banding can expand rapidly, prevents further extension of flame. If the protection of this place became invalid, the fire protection coating on upper and lower apron can prevent that open flame from upper cover plate and apron welding area blowout down, blocks the contact of air and the soft packet of electricity core of out of control simultaneously.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. A thermal runaway prevention soft package battery module comprises a battery module body, an upper cover plate (1), a lower cover plate (7) and end plates (4) positioned at two ends of the battery module body; the method is characterized in that: the battery core assembly is formed by stacking a plurality of soft-package battery cores (6) in the thickness direction, each two soft-package battery cores (6) are battery core groups, and an inner protection plate (52) is arranged between every two adjacent battery core groups; two outer protective plates (51) are respectively arranged at the two outer sides of the electric core component;
the inner protection plate (52) and the outer protection plate (51) are identical in structure and respectively comprise a foam layer (54), and mica sheets (56) are respectively stuck on two side faces of the foam layer (54) through a double-faced adhesive tape layer (55).
2. The thermal runaway prevention soft package battery module as recited in claim 1, wherein: two side edges of the upper cover plate (1) are provided with lower buckling edges bent downwards, and two side edges of the lower cover plate (7) are provided with upper buckling edges bent upwards; the outer side wall of the lower buckling edge is provided with at least two grooves (11), and the inner side wall of the upper buckling edge is fixedly provided with a convex block (71) matched with the grooves (11); the lower buckling edge and the upper buckling edge are positioned through the groove (11) and the bump (71) and then are connected in a welding mode.
3. The thermal runaway prevention soft package battery module as recited in claim 2, wherein: the top edge of the outer side wall of the outer protection plate (51) is adhered with an adhesive tape (53).
4. The thermal runaway prevention soft package battery module as recited in claim 1, wherein: two sides of the inner protection plate (52) are respectively bonded on the adjacent electric core groups.
5. The thermal runaway prevention soft package battery module as recited in claim 1, wherein: be equipped with PLASTIC LAMINATED (2) between upper cover plate (1) and the electric core subassembly, the both sides limit of PLASTIC LAMINATED (2) is equipped with the turn-ups, the turn-ups bonds with the top of outer guard plate (51).
6. The thermal runaway prevention soft package battery module as recited in claim 1, wherein: and a fireproof coating is sprayed at the edge sealing position of the soft package battery cell (6).
7. The thermal runaway prevention soft package battery module as recited in claim 1, wherein: the inner side walls of the upper cover plate (1) and the lower cover plate (7) are both provided with fireproof coatings.
8. The thermal runaway prevention soft package battery module as recited in claim 1, wherein: be equipped with between end plate (4) and the electric core subassembly insulation board (3), the exhaust passage has been seted up on end plate (4), the total area of exhaust passage is not less than 1800mm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120473638.2U CN214411321U (en) | 2021-03-03 | 2021-03-03 | Thermal runaway prevention soft package battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120473638.2U CN214411321U (en) | 2021-03-03 | 2021-03-03 | Thermal runaway prevention soft package battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214411321U true CN214411321U (en) | 2021-10-15 |
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ID=78027639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120473638.2U Active CN214411321U (en) | 2021-03-03 | 2021-03-03 | Thermal runaway prevention soft package battery module |
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| Country | Link |
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| CN (1) | CN214411321U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114312604A (en) * | 2022-03-11 | 2022-04-12 | 浙江荣泰电工器材股份有限公司 | Upper cover thermal runaway protection mica structural member for new energy automobile and preparation method thereof |
| PL443532A1 (en) * | 2022-03-31 | 2023-10-02 | Korea Hightech Co., Ltd. | Battery module having double-sided adhesive tape to reduce temperature and pressure caused by thermal instability |
-
2021
- 2021-03-03 CN CN202120473638.2U patent/CN214411321U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114312604A (en) * | 2022-03-11 | 2022-04-12 | 浙江荣泰电工器材股份有限公司 | Upper cover thermal runaway protection mica structural member for new energy automobile and preparation method thereof |
| CN114312604B (en) * | 2022-03-11 | 2022-06-17 | 浙江荣泰电工器材股份有限公司 | Upper cover thermal runaway protection mica structural member for new energy automobile and preparation method thereof |
| PL443532A1 (en) * | 2022-03-31 | 2023-10-02 | Korea Hightech Co., Ltd. | Battery module having double-sided adhesive tape to reduce temperature and pressure caused by thermal instability |
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