CN210535737U - Heat insulation assembly of battery pack - Google Patents
Heat insulation assembly of battery pack Download PDFInfo
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- CN210535737U CN210535737U CN201921839311.1U CN201921839311U CN210535737U CN 210535737 U CN210535737 U CN 210535737U CN 201921839311 U CN201921839311 U CN 201921839311U CN 210535737 U CN210535737 U CN 210535737U
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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 belongs to the technical field of the vehicle, concretely relates to thermal-insulated subassembly of battery package. The utility model discloses can influence peripheral electric core, the low problem of power battery's factor of safety when aiming at solving power battery's the individual electric core thermal runaway. Mesh for this reason, the utility model discloses a thermal-insulated subassembly of battery package includes the module upper cover, sealing member and the cotton pad of fire prevention, wherein, sealing member, module upper cover and the cotton pad of fire prevention set gradually by supreme down, so as to keep apart the independent exhaust passage of each other between the upper cover plate of the top of every electric core and box, thereby make the relief valve of individual electric core when discharging high-temperature gas, high-temperature gas can not stretch to other electric core positions, rise the ambient temperature of other electric cores, avoid individual electric core thermal runaway and cause whole battery package explosion, catch fire, the factor of safety of battery package has been promoted.
Description
Technical Field
The utility model belongs to the technical field of the vehicle, concretely relates to thermal-insulated subassembly of battery package.
Background
With the development of new energy vehicles, particularly pure electric vehicles, power batteries are gaining attention as core components of electric vehicles. In addition to the performance of the power battery, the safety of the power battery is also greatly regarded by the driver.
Generally, a battery safety accident is mainly caused by the thermal runaway of a battery cell of a power battery. When individual electric core is out of control, the electric core out of control can influence the state of other peripheral electric cores and then cause the large-scale thermal out of control of a plurality of electric cores, finally lead to the battery to explode, catch fire and other safety accidents.
Accordingly, there is a need in the art for a new thermal insulation assembly for a battery pack that addresses the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems in the prior art, that is, to solve the problem that the safety coefficient of the power battery is low when the thermal runaway of the individual runaway cell of the power battery is affected, the utility model provides a thermal insulation assembly of a battery pack, the battery pack comprises a box body and at least one battery module contained in the box body, the battery module comprises a plurality of cells, the thermal insulation assembly comprises a module upper cover, the module upper cover is arranged between the cells and an upper cover plate of the box body and covers the top of the cells, the module upper cover is provided with a plurality of hollowed-out structures, the hollowed-out structures are aligned with the relief valves on the top of each cell, the thermal insulation assembly further comprises a sealing component, the module upper cover is pressed onto the cells through the sealing component, and the sealing component is provided with a plurality of air passing structures, one end of the gas passing structure surrounds the pressure release valve of the battery cell, and the other end of the gas passing structure is communicated with the hollow structure, so that a plurality of mutually independent exhaust passages can be formed between each battery cell and the hollow structure through the gas passing structure.
In the preferable technical scheme of the heat insulation assembly, the hollow structure is a rectangular through hole formed in the module upper cover.
In the preferable technical scheme of the heat insulation assembly, the air inlet side of the hollow structure extends to one side close to the battery cell in a mode of surrounding the hollow structure to form a ring-shaped structure, and the ring-shaped structure is clamped and matched with the air passing structure.
In the preferable technical scheme of the heat insulation assembly, a concave structure is arranged at the top of the battery cell, the pressure release valve is arranged in the concave structure, and the tail end of the ring-shaped structure is embedded and matched with the side wall of the concave structure.
In a preferred embodiment of the above heat insulation assembly, the sealing member is a foamed member.
In the preferable technical scheme of the heat insulation assembly, the module upper cover is further provided with a plurality of protruding structures, the protruding structures are arranged between every two hollow structures, the module upper cover is tightly abutted to the upper cover plate of the box body through the protruding structures, the protruding structures can isolate a plurality of air accommodating spaces between the module upper cover and the upper cover plate of the box body, and each air accommodating space is only communicated with one hollow structure.
In a preferred embodiment of the above heat insulation assembly, the protrusion structure is a rectangular protrusion structure.
In a preferred technical scheme of the heat insulation assembly, a cavity is formed in one side, close to the battery core, of the rectangular protruding structure, a clamping block is arranged on the sealing component, and the clamping block is clamped in the cavity in an installed state.
In the preferable technical scheme of the heat insulation assembly, the heat insulation assembly further comprises a fireproof pad, and the module upper cover is tightly abutted to the upper cover plate of the box body through the fireproof pad.
In the preferable technical scheme of the heat insulation assembly, the fireproof pad is a fireproof cotton pad.
As can be appreciated by those skilled in the art, the thermal insulation assembly of the battery pack of the present invention includes a module upper cover and a sealing member, wherein the module upper cover is provided with a plurality of hollow structures and each hollow structure is aligned with the relief valve at the top of each cell one by one. The sealing component is provided with a plurality of air passing structures, and the air passing structures can form a plurality of mutually independent exhaust channels between each battery cell and the corresponding hollow-out structures. Through the arrangement, the pressure relief valves of the battery cells can be arranged independently of one another under the surrounding of the heat insulation assembly. Even the high-temperature gas is discharged by the pressure release valve of the individual battery core, the high-temperature gas can not spread to other battery core positions and raise the temperature of other battery cores to be above the critical point of normal operation temperature, so that the problem that the individual battery core is out of control due to thermal runaway to cause explosion and ignition of the whole battery module or even the battery pack is avoided, the safety factor of the battery pack is improved, the operation reliability of the battery pack is optimized, and the possibility of safety accidents of the battery pack is reduced.
Drawings
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The attached drawings are as follows:
fig. 1 is an assembly schematic view of a heat insulation assembly of a battery pack of the present invention;
FIG. 2 is an enlarged partial view of the location of the insulation assembly of FIG. 1;
fig. 3 is a schematic view of the overall structure of the heat insulation assembly of the battery pack of the present invention;
fig. 4 is a schematic structural view of a sealing member of a heat insulation assembly of a battery pack according to the present invention;
fig. 5 is a schematic structural view of the outer side of the module upper cover of the heat insulation assembly of the battery pack according to the present invention;
fig. 6 is an inner side structure diagram of the module upper cover of the heat insulation assembly of the battery pack of the present invention.
In the drawings:
1. an upper cover plate; 2. an electric core; 21. a relief valve setting area; 3. a module upper cover; 31. a cover body; 32. a cover rim; 33. a hollow structure; 34. a loop-like structure; 35. a raised structure; 36. a cavity; 4. a sealing member; 41. a gas passing structure; 42. a clamping block; 5. a fire protection mat.
Detailed Description
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element 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, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 by those skilled in the art according to specific situations.
Referring first to fig. 1-3, fig. 1 is an assembly view of a heat insulation assembly of a battery pack according to the present invention, fig. 2 is a partial enlarged view of the position of the heat insulation assembly in fig. 1, and fig. 3 is a schematic view of the overall structure of the heat insulation assembly of the battery pack according to the present invention. As shown in fig. 1-3, the battery pack of the present invention comprises a box body and at least one battery module accommodated in the box body, wherein the battery module comprises a plurality of battery cells 2. The case includes a main body (not shown in the drawings) and an upper cover plate 1 covering the top of the main body. A plurality of rectangular parallelepiped battery cells 2 are arranged in a plurality of rows and accommodated in the main body, and one end of the battery cell 2 provided with the pressure release valve is placed close to the upper cover plate 1. The utility model discloses a thermal-insulated subassembly of battery package also sets up in above-mentioned box, and it includes module upper cover 3, and this module upper cover 3 sets up between the upper cover plate 1 of a plurality of electric cores 2 and box and covers the top to these a plurality of electric cores 2. A plurality of hollow structures 33 are arranged on the module upper cover 3 corresponding to each electric core 2 covered by the module upper cover. In the installed condition, the respective cutouts 33 are aligned one-to-one with the pressure relief valves at the top of each cell 2. The heat insulation assembly further comprises a sealing component 4 arranged between the top of the battery cell 2 and the module upper cover 3. The sealing member 4 is provided with a plurality of gas passing structures 41, one end of each gas passing structure 41 surrounds the pressure release valve of the battery cell 2, and the other end of each gas passing structure 41 is communicated with the hollow structure 33. Above-mentioned module upper cover 3 compresses tightly to electric core 2 through sealing member 4 on to make sealing member 4 seal between module upper cover 3 and electric core 2. Under this situation, as for a single electric core, the one end of gas passing structure 41 tightly surrounds the relief valve of electric core 2, and the other end supports tightly to the hollow structure 33 position of module upper cover 3, so that sealing member 4 and module upper cover 3 can construct an independent exhaust passage at the relief valve position of electric core 2, and thus the high-temperature gas discharged by the relief valve can not spread and diffuse to other electric core 2 positions, and can only flow along the passage formed by gas passing structure 41 and hollow structure 33. Through the arrangement, each battery cell 2 can exhaust through the mutually independent exhaust channels, and an independent high-temperature gas slow-release detention area is constructed at the top of each battery cell 2. The situation that the individual electric core 2 is out of control due to heat, and the high-temperature gas is diffused to other parts after the high-temperature gas is discharged, so that the other electric cores 2 are out of control due to heat is avoided.
In the above embodiment, in the case of accommodating multiple columns of battery cells 2 (the multiple columns of battery cells 2 may belong to one battery module or may belong to multiple battery modules) in the box, the module upper cover 3 may cover all the battery cells 2, or may cover any number of partial battery cells 2. For example, in fig. 1 or fig. 2, in a case where one battery module is accommodated in the case and the battery module includes eight rows of the battery cells 2, the number of the module upper covers 3 is eight, and each module upper cover 3 covers one row of the battery cells 2 (i.e., six battery cells 2) so as to cover all the illustrated battery cells 2. Of course, when practical application, the actual quantity of module upper cover 3 can be set for according to the actual quantity of electric core 2 and the electric core 2 quantity that every module upper cover 3 can cover.
Through the setting of above-mentioned thermal-insulated subassembly, make every electric core 2 and the hollow out construction 33 that corresponds between all can form a plurality of independent exhaust passage of each other through its air passing structure 41 and hollow out construction 33 between the two, thereby make thermal runaway's electric core 2 exhaust high-temperature gas can not contact other electric cores 2, cause other electric core 2's thermal runaway, the single thermal-insulated arrangement of electric core 2 has been realized, the security and the stability of battery package have greatly been promoted, the catching fire of battery package has been reduced, the incidence of overheated fault such as explosion.
Referring to fig. 4 and 5, fig. 4 is a schematic structural view of the sealing member 4 of the heat insulation assembly of the battery pack according to the present invention, and fig. 5 is a schematic structural view of the outer side of the module upper cover 3 of the heat insulation assembly of the battery pack according to the present invention. As shown in fig. 4 and 5, in one possible embodiment, the module upper cover 3 includes a cover 31 having a rectangular plate shape and a ring-shaped cover rim 32 provided at an edge of the cover 31. Under the good condition of module upper cover 3 installation, module upper cover 3 just with a list of electric core 2 block to lid along 32 in, the laminating of the inboard surface of electric core 2 and lid along 32 or closely press close to reduce the occupation space of a list of electric core 2 in the main part. The top of the battery cell 2 is provided with a recessed structure (that is, a recessed position of the relief valve setting area 21 is shown inside the drawing), and the relief valve is arranged in the recessed structure. Above-mentioned hollow out construction 33 is for setting up the rectangle through-hole on lid 31, and the shape phase-match of the sunk structure at the shape of this rectangle through-hole and 2 tops of electric core, so that 3 locks of module upper cover are to a list electric core 2 on the time, each rectangle through-hole can be located the relief valve top of every electric core 2 just, so that when the rectangle through-hole is crooked to set up, high-temperature gas flows very fast and scurries to the gas retention district of other electric cores 2, causes certain harmful effects to other electric cores 2.
In this case, the gas passing structure 41 on the sealing member 4 is a straight hole channel arranged between the rectangular through hole and the recessed structure of the electric core 2, and the cross sectional shape of the hole channel is matched with the shape of the recessed structure at the top of the electric core 2, so that a straight exhaust channel can be formed between the gas passing structure 41 close to the recessed structure and the hollowed-out structure 33, so that the high-temperature gas exhausted by the electric core 2 can be rapidly exhausted to the gas retention area near the hollowed-out structure 33, the exhaust electric core 2 is also rapidly far away under the condition of not diffusing to other electric cores 2, and the thermal runaway degree aggravated by covering the exhaust electric core 2 with the high-temperature gas is avoided.
Referring to fig. 6 and with continued reference to fig. 3-5, fig. 6 is a schematic view of the inner side of the module upper cover 3 of the heat insulation assembly of the battery pack according to the present invention. As shown in fig. 3 to 6, preferably, according to the orientation shown in fig. 3, the lower side of the hollow-out structure 33 (i.e. the air inlet side of the hollow-out structure 33) extends to a side close to the battery cell 2 in a manner of surrounding the hollow-out structure 33 with a ring-shaped structure 34, i.e. the lower end of the rectangular through hole extends downwards along the edge of the through hole with a ring-shaped structure 34 with a rectangular cross section. The ring-shaped structure 34 is in clamping fit with the gas passing structure 41, penetrates through the gas passing structure 11 and then extends into the recessed structure, and is in clamping fit with the recessed structure at the top of the battery cell 2, and the tail end of the ring-shaped structure 34 is embedded into the recessed structure. Through the above-mentioned setting, on the one hand, can increase the closely spent of the cooperation of sealing member 4 and module upper cover 3 for thermal-insulated component can set up in electric core 2 top more steadily. On the other hand, the blocking of the ring-shaped structure 34 enables the exhaust passage to have a double blocking wall composed of the ring-shaped structure 34 and the sealing member 4, further improving the gas isolation reliability.
As shown in fig. 3-6, the module cover 3 is preferably further provided with a plurality of protruding structures 35. The protruding structures 35 are arranged between every two hollow structures 33, and the module upper cover 3 is tightly abutted to the upper cover plate 1 of the box body through the protruding structures 35. As shown in the orientation of fig. 5, the projection 35 is disposed at a position corresponding to a gap between two battery cells 2 and extends from the front side to the rear side of the upper cover plate 1. Under the state of having installed, a plurality of protruding structures 35 that lean on upper cover plate 1 can keep apart a plurality of gas spaces of holding between module upper cover 3 and upper cover plate 1 to every holds the gas space and only communicates with a hollow out construction 33, makes the high temperature gas that electric core 2 exhaust can get into this air exhaust electric core 2 through hollow out construction 33 and corresponds holds in the gas space. The gaseous detention district at every electric core 2 top has been expanded, and the high temperature gas of being convenient for is detained and is cooled down gradually in bigger space, has promoted the battery module to the high temperature gas's of 2 exhaust of thermal runaway electric cores tolerance degree, has slowed down the thermal runaway process of electric core 2.
Further, as an example, the protrusion structure 35 is a long rectangular protrusion structure 35 to ensure that there is a sufficient contact area between the module upper cover 3 and the upper cover plate 1, thereby ensuring the blocking reliability of each air accommodating space.
More preferably, a cavity 36 is disposed at one side of the rectangular protruding structure 35 close to the battery cell 2, and an opening of the cavity 36 is formed on the inner side surface of the module upper cover 3, so that the cavity 36 communicates with the external environment. A latch 42 is provided on a side of the sealing member 4 close to the module upper cover 3. In the mounted state, the latch 42 extends into and is latched in the cavity 36 to further increase the tightness of the fit of the modular upper cover 3 to the sealing member 4. Meanwhile, the fixture block 42 and the cavity 36 are arranged to further improve the heat insulation degree between the electric cores 2, so that high-temperature gas is less prone to escape to other positions of the electric cores 2.
In a preferred embodiment, the sealing member 4 is a foam. Specifically, in actual operation, when assembling the heat insulation assembly, it is necessary to lock the module upper cover 3 to a row of electric cores 2, and then fully fill the fluid-shaped sealing member 4 between the module upper cover 3 and the top of the electric core 2, so that the sealing member 4 is filled and cured in the outer side of the ring-shaped structure 34, the cavity 36 below the rectangular protruding structure 35, and the gap between the module upper cover 3 and the top of the electric core 2, so that the gap between the module upper cover 3 and the electric core 2 is reliably sealed by the sealing member 4.
Reference is again made to fig. 1-3. Preferably, the thermal insulation assembly of the present invention further comprises a fire protection mat 5. This fire prevention pad 5 sets up between module upper cover 3 and upper cover plate 1, and protruding structure 35 of module upper cover 3 supports tightly to the inboard surface of upper cover plate 1 through fire prevention pad 5. Through the setting, when electric core 2 discharges high-temperature gas to the appearance gas space in, fire prevention pad 5 can keep apart heat and upper cover plate 1, has slowed down the degree that upper cover plate 1 generates heat, avoids upper cover plate 1's local position to be burnt out by thermal runaway electric core 2.
As an example, the fireproof pad 5 is a fireproof cotton pad made of fireproof cotton material. The material has high heat resistance and certain flexibility, and can better seal a gap between the rectangular convex structure 35 and the inner side surface of the upper cover plate 1.
It will be appreciated by those skilled in the art that although the present invention has been described in conjunction with the module cover 3, the sealing member 4 and the fire-blocking cotton pad, this is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Modifications to the disclosed embodiments may be made by those skilled in the art without departing from the underlying principles of the invention to adapt it to particular applications. For example, the insulation assembly of the present invention may not include a fire-blocking cotton pad. In addition, the material and structure of any one of the sealing member 4, the module upper cover 3 and the fire-proof mat 5 are not fixed, and the specific shape and material of each heat-insulating member can meet the corresponding heat-insulating or sealing requirements. For example, the sealing member 4 may also be a shaped sealing fire-proof member made of the remaining fire-proof material instead of a foam. Alternatively, the module top cover 3 may not include the protrusion 35 and/or the cavity 36, provided that the requirement of fire protection is met. The technical scheme who adjusts according to above-mentioned mode does not deviate the utility model discloses a protection is kept away from, consequently will fall into the utility model discloses an within the protection scope.
To sum up, the utility model discloses a thermal-insulated subassembly of battery package includes module upper cover 3, sealing member 4 and the cotton pad of fire prevention, wherein, sealing member 4, module upper cover 3 and the cotton pad of fire prevention set gradually by supreme down, so that keep apart the exhaust passage independent of each other between the top of every electric core 2 and the upper cover plate 1 of box, thereby make the relief valve of individual electric core 2 when discharge high-temperature gas, high-temperature gas can not stretch to other electric core 2 positions, rise the ambient temperature of other electric cores 2, avoid individual electric core 2 thermal runaway and cause whole battery package explosion, fire, the factor of safety of battery package has been promoted.
So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims (10)
1. A heat insulation assembly of a battery pack is characterized in that the battery pack comprises a box body and at least one battery module contained in the box body, the battery module comprises a plurality of battery cores,
the heat insulation assembly comprises a module upper cover, the module upper cover is arranged between the battery cell and an upper cover plate of the box body and covers the top of the battery cell,
a plurality of hollow structures are arranged on the upper cover of the module, the hollow structures are aligned with the pressure release valves on the top of each battery cell one by one,
the module upper cover is tightly pressed onto the battery cell through the sealing component, a plurality of gas passing structures are arranged on the sealing component, one ends of the gas passing structures surround the pressure release valves of the battery cell, and the other ends of the gas passing structures are communicated with the hollow structures, so that each battery cell and the hollow structures can form a plurality of mutually independent exhaust passages through the gas passing structures.
2. The heat insulation assembly of claim 1, wherein the hollowed-out structure is a rectangular through hole disposed on the module upper cover.
3. The heat insulation assembly of claim 1, wherein the air inlet side of the hollow structure extends to a side close to the battery cell in a manner of surrounding the hollow structure with a ring-shaped structure, and the ring-shaped structure is in clamping fit with the air passing structure.
4. The heat insulation assembly of claim 3, wherein a recessed structure is arranged at the top of the battery cell, the pressure relief valve is arranged in the recessed structure, and the tail end of the ring-shaped structure is in embedded fit with the side wall of the recessed structure.
5. The heat insulation assembly of claim 1, wherein the module upper cover is further provided with a plurality of protruding structures, the protruding structures are arranged between every two hollowed-out structures, the module upper cover is tightly abutted to the upper cover plate of the box body through the protruding structures,
the plurality of protruding structures can isolate a plurality of air containing spaces between the module upper cover and the upper cover plate of the box body, and each air containing space is only communicated with one hollow structure.
6. The insulation assembly of claim 5, wherein the raised structure is a rectangular raised structure.
7. The heat insulation assembly of claim 6, wherein a cavity communicated with the outside is formed in one side of the rectangular protruding structure close to the battery cell, and a clamping block is arranged on the sealing member and clamped in the cavity in an installed state.
8. An insulation assembly as claimed in claim 4 or 6, wherein the sealing member is a foam.
9. The insulation assembly of claim 1, further comprising a fire protection gasket, wherein the module top cover is fastened to the top cover of the box body by the fire protection gasket.
10. The insulation assembly of claim 9, wherein the fire protection mat is a fire protection cotton mat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921839311.1U CN210535737U (en) | 2019-10-29 | 2019-10-29 | Heat insulation assembly of battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921839311.1U CN210535737U (en) | 2019-10-29 | 2019-10-29 | Heat insulation assembly of battery pack |
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| CN210535737U true CN210535737U (en) | 2020-05-15 |
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| CN201921839311.1U Active CN210535737U (en) | 2019-10-29 | 2019-10-29 | Heat insulation assembly of battery pack |
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| US11611128B2 (en) | 2020-07-10 | 2023-03-21 | Contemporary Amperex Technology Co., Limited | Battery and related apparatus, production method and production device therefor |
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| DE102022107099A1 (en) | 2022-03-25 | 2023-09-28 | Bayerische Motoren Werke Aktiengesellschaft | Cell module with multiple cell packages and a heat-resistant barrier between the cell packages |
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| CN114678638A (en) * | 2022-03-31 | 2022-06-28 | 欣旺达电动汽车电池有限公司 | Exhaust assembly, battery module and battery pack |
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