CN214313357U - Top cover assembly of power battery module and power battery module - Google Patents
Top cover assembly of power battery module and power battery module Download PDFInfo
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- CN214313357U CN214313357U CN202120245978.XU CN202120245978U CN214313357U CN 214313357 U CN214313357 U CN 214313357U CN 202120245978 U CN202120245978 U CN 202120245978U CN 214313357 U CN214313357 U CN 214313357U
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- battery module
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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 the technical field of battery manufacturing, in particular to a top cover component of a power battery module, which is used for covering the surface of an electric core provided with an explosion-proof valve, and the top cover component is sequentially provided with an upper cover plate, a fire extinguishing layer and a heat insulation plate towards the direction close to the explosion-proof valve; and a through hole is formed in the position, corresponding to the explosion-proof valve, of the heat insulation plate. The utility model provides a power battery module top cap subassembly has the security performance of preferred.
Description
Technical Field
The utility model relates to a battery manufacturing technology field especially relates to a top cap subassembly of power battery module.
Background
The power battery module generally includes the casing and is located a plurality of electric cores of casing, and electric core can produce a large amount of gases when inefficacy, if unable in time exhaust, reaches certain pressure after, and electric core can explode, can stretch other electric cores even, leads to the problem of being out of control of cluster.
In recent years, new energy automobiles develop rapidly, and people have higher and higher requirements on the safety performance of power battery modules of the new energy automobiles. At present, an explosion-proof valve is arranged on the top surface of an electric core in a main means for preventing thermal runaway of a power battery module, and when the air pressure in the electric core reaches a threshold value, the explosion-proof valve can be broken by air, so that pressure relief is realized.
The explosion-proof valve of electricity core all sets up, and when taking place thermal runaway, the gas and other electrolyte that violent reaction produced in the electricity core can be violent erupts upward, and present casing upper cover is plastic construction, is destroyed easily when meetting the air current and the electrolyte that upward erupt, causes other adjacent electric cores impaired, can't satisfy battery thermal runaway's protection requirement.
Therefore, there is a need for an improved upper cover of the casing, so as to solve the problem that the upper cover is easily damaged by the upward airflow and electrolyte sprayed from the battery cells, so that other adjacent battery cells are damaged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a top cap subassembly of power battery module has the security performance of preferred.
In order to achieve the above object, in one aspect, the present invention provides a top cover assembly for covering a surface of an electrical core, the surface being provided with an explosion-proof valve, the top cover assembly being provided with an upper cover plate, a fire extinguishing layer and a heat insulation plate in sequence towards a direction close to the explosion-proof valve;
and a through hole is formed in the position, corresponding to the explosion-proof valve, of the heat insulation plate.
Optionally, the fire extinguishing layer comprises a fire extinguishing material and a coating film coating the fire extinguishing material.
Optionally, the melting point of the upper cover plate is higher than that of the coating film.
Optionally, the heat insulation plate is made of mica.
Optionally, the fire extinguishing layer covers an orifice of one end of the through hole, which is far away from the explosion-proof valve, so that the through hole forms an accommodating groove with an opening facing the explosion-proof valve.
Optionally, one side of the fire extinguishing layer close to the through hole is recessed towards the direction far away from the through hole.
On the other hand, the power battery module comprises an enclosing frame, a plurality of battery cores and any top cover assembly, wherein the enclosing frame is formed by enclosing end plates and side plates, the battery cores are located in the enclosing frame, and the top cover assembly is used for covering the enclosing frame.
Alternatively to this, the first and second parts may,
a closed boss is fixedly arranged on one side, close to the battery core, of the top cover assembly, and the closed boss surrounds to form a flow guide channel communicated with the through hole;
and one side of the enclosing boss, which is close to the battery cell, is abutted against the battery cell, and the explosion-proof valve is enclosed in the flow guide channel.
Optionally, a wire harness isolation plate is arranged between the top cover assembly and the battery core;
the wire harness isolation plate is provided with a yielding hole at a position corresponding to the anti-explosion valve of the battery cell, and the enclosing boss extends into the yielding hole.
Optionally, the enclosing boss and the heat insulation plate are of an integrally formed structure.
The beneficial effects of the utility model reside in that: the top cover assembly and the power battery module are provided, when the battery core is out of control thermally, the explosion-proof valve of the out of control thermally electric core is broken by airflow and electrolyte and is sprayed outwards, and then the fire extinguishing layer is directly sprayed to the upper part of the through hole through the through hole; on the other hand, because the heat insulating board has good heat insulating performance, the heat sprayed outside the thermal runaway cell is sealed in the through hole and is difficult to be transmitted to other adjacent cells in a large quantity, and further the electrical safety of other adjacent cells is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a power battery module according to an embodiment;
fig. 2 is an exploded schematic view of a power battery module according to an embodiment;
fig. 3 is a schematic cross-sectional view of a power battery module according to an embodiment.
In the figure:
1. enclosing a frame;
2. an electric core; 201. an explosion-proof valve;
3. a cap assembly; 301. an upper cover plate; 302. a fire extinguishing layer; 303. a heat insulation plate; 3031. a through hole; 3032. enclosing the boss;
4. a wire harness isolation plate.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have the specific orientation, operate in the specific orientation configuration, and thus, should not be construed as limiting the present invention.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 1 to fig. 3, the embodiment provides a power battery module, which includes an enclosure frame 1 enclosed by end plates and side plates, a plurality of battery cells 2 located in the enclosure frame 1, and a top cover assembly 3 for covering an opening of the enclosure frame 1.
The top cover assembly 3 is used to cover the explosion-proof valve 201 on the top surface of the electric core 2, so as to prevent the air flow and electrolyte in the electric core 2 from involving other electric cores when being sprayed outwards.
Specifically, the top cover assembly 3 is sequentially provided with an upper cover plate 301, a fire extinguishing layer 302 and a heat insulation plate 303 towards the direction close to the explosion-proof valve 201; the heat insulation plate 303 is provided with a through hole 3031 at a position corresponding to the explosion-proof valve 201.
When the electric core 2 is in thermal runaway, the airflow and the electrolyte burst through the explosion-proof valve 201 of the thermal runaway electric core and are sprayed outwards, and then the airflow and the electrolyte directly spray to the fire extinguishing layer 302 above the through hole 3031 through the through hole 3031, on one hand, if the flame is carried by the externally sprayed airflow and the electrolyte, the fire extinguishing layer 302 can extinguish the flame, and further, the explosion accident caused by the spread of fire is avoided; on the other hand, since the thermal insulation plate 303 has good thermal insulation performance, the heat sprayed from the thermal runaway cell 2 is confined in the through hole 3031, and is difficult to be transmitted to another adjacent cell 2 in a large amount, thereby ensuring the electrical safety of the other adjacent cell 2. Therefore, the power battery module that this embodiment provided can effectively solve traditional power battery module upper cover and be destroyed by the air current and the electrolyte that electric core 2 erupted upwards easily, causes the impaired problem of other adjacent electric cores 2, and the security performance preferred.
Optionally, the fire extinguishing layer 302 includes a fire extinguishing material and a coating film that coats the fire extinguishing material. Illustratively, the fire extinguishing material may be carbon dioxide powder, mica powder, talc powder or the like, or the fire extinguishing material may further include, but is not limited to, heptafluoropropane, perfluoropolyether, perfluorohexanone, aerosol, halothane (halon), hydrofluorocarbon compound or perfluoro-based compound, and may be a composite material, at least one material, and the hydrofluorocarbon compound includes, but is not limited to, R134A (alternative refrigerant to R12), R125, R32, R407C, R410A (alternative refrigerant to R22), R152 and the like; perfluoro-type compounds include, but are not limited to, perfluorohexanone, perfluoropolyether.
The coating film is used for realizing plate-shaped shaping of the fire extinguishing material, and when encountering flame or reaching a threshold value (for example, 100 ℃), the coating film is burnt, and then the fire extinguishing material falls into the through hole 3031 for automatic fire extinguishing. In this embodiment, the melting point of the upper cover plate is higher than that of the coating film, so that the coating film can be burnt first if a fire occurs, and the fire extinguishing material falls to extinguish flame so as to prevent the upper cover plate from being burnt. Further, the upper cover plate 301 is made of a refractory material having a high melting point, such as steel, iron plate, or aluminum alloy, and thus the upper cover plate 301 cannot be burnt through even if high-temperature flames are carried by the externally-sprayed air flow and the electrolyte.
Optionally, the heat insulation plate 303 is made of materials with better heat insulation performance, such as asbestos, mica, or silica gel. When the electric core 2 out of control thermally erupts gas and electrolyte, the thermal insulation plate 303 is high temperature resistant, and can seal heat in the through hole 3031, so that a large amount of heat is prevented from being conducted to the adjacent electric core 2, and the situation that the series of electric cores 2 out of control is caused is avoided.
The fire extinguishing layer 302 covers an opening of one end of the through hole 3031 far away from the explosion-proof valve 201, so that the through hole 3031 forms a containing groove with an opening facing the explosion-proof valve 201, and the externally sprayed air flow and electrolyte can be contained in the containing groove.
Further, one side of the fire extinguishing layer 302 close to the through hole 3031 is recessed in a direction far away from the through hole 3031, so that the volume of the accommodating groove is increased.
In this embodiment, a confining boss 3032 is fixedly arranged on one side of the thermal insulation board 303 close to the electric core 2, and the confining boss 3032 surrounds and forms a flow guide channel communicated with the through hole 3031. The side, close to the electric core 2, of the enclosing boss 3032 abuts against the electric core 2, and the explosion-proof valve 201 is enclosed in the flow guide channel. Further, a wiring harness isolation plate 4 is arranged between the top cover assembly 3 and the battery core 2. A yielding hole is formed in the position, corresponding to the explosion-proof valve 201 of the battery cell 2, of the wire harness isolation plate 4, and the enclosing boss 3032 extends into the yielding hole. The diversion channel can form diversion action on the externally sprayed airflow and electrolyte when the electric core 2 is out of control due to heat, so that the airflow carrying flame and the electrolyte are sprayed upwards and do not leak to the side edge, and other adjacent electric cores are prevented from being damaged.
Optionally, the enclosing boss 3032 and the heat insulation plate 303 are of an integrally formed structure, so that assembly is not required, and production is facilitated.
Alternatively, the cap assembly 3 may be a composite structure. Of course, it may be a unitary structure, for example, the heat insulation board 303 and the fire extinguishing layer 302 are both attached to the upper cover plate 301.
The power battery module that this embodiment provided possesses following advantage:
gas and electrolyte sprayed out when the battery cell 2 is out of control can be guided into a flow guide channel and a through hole 3031 in the top cover component 3, so that short circuit and out of control of other battery cells caused by diffusion to peripheral battery cells are avoided;
secondly, the flame caused by the thermal runaway of the battery cell 2 can be extinguished through the extinguishing layer 302.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A top cover assembly of a power battery module is used for covering the surface of an electric core provided with an explosion-proof valve and is characterized in that an upper cover plate, a fire extinguishing layer and a heat insulation plate are sequentially arranged on the top cover assembly towards the direction close to the explosion-proof valve;
and a through hole is formed in the position, corresponding to the explosion-proof valve, of the heat insulation plate.
2. The top cap assembly of the power battery module as claimed in claim 1, wherein the fire extinguishing layer comprises a fire extinguishing material and a coating film coating the fire extinguishing material.
3. The top cap assembly of the power battery module as claimed in claim 2, wherein the melting point of the upper cover plate is higher than that of the coating film.
4. The top cover assembly of a power battery module as set forth in claim 1, wherein said heat insulation plate is made of mica.
5. The top cover assembly of the power battery module as claimed in claim 1, wherein the fire extinguishing layer covers an aperture at an end of the through hole remote from the explosion-proof valve such that the through hole forms a receiving groove opening towards the explosion-proof valve.
6. The top cover assembly of the power battery module as claimed in claim 5, wherein one side of the fire extinguishing layer close to the through hole is recessed in a direction away from the through hole.
7. A power battery module is characterized by comprising an enclosing frame enclosed by end plates and side plates, a plurality of battery cores positioned in the enclosing frame, and a top cover assembly used for covering the enclosing frame and defined by any one of claims 1-6.
8. The power battery module of claim 7,
a closed boss is fixedly arranged on one side, close to the battery core, of the top cover assembly, and the closed boss surrounds to form a flow guide channel communicated with the through hole;
and one side of the enclosing boss, which is close to the battery cell, is abutted against the battery cell, and the explosion-proof valve is enclosed in the flow guide channel.
9. The power battery module of claim 8, wherein a wiring harness isolation plate is arranged between the top cover assembly and the battery core;
the wire harness isolation plate is provided with a yielding hole at a position corresponding to the anti-explosion valve of the battery cell, and the enclosing boss extends into the yielding hole.
10. The power battery module as claimed in claim 8, wherein the enclosure boss and the thermal insulation plate are of an integrally formed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120245978.XU CN214313357U (en) | 2021-01-28 | 2021-01-28 | Top cover assembly of power battery module and power battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120245978.XU CN214313357U (en) | 2021-01-28 | 2021-01-28 | Top cover assembly of power battery module and power battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214313357U true CN214313357U (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120245978.XU Active CN214313357U (en) | 2021-01-28 | 2021-01-28 | Top cover assembly of power battery module and power battery module |
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| CN (1) | CN214313357U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114976470A (en) * | 2022-07-28 | 2022-08-30 | 广东采日能源科技有限公司 | Energy storage battery box |
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2021
- 2021-01-28 CN CN202120245978.XU patent/CN214313357U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114976470A (en) * | 2022-07-28 | 2022-08-30 | 广东采日能源科技有限公司 | Energy storage battery box |
| CN114976470B (en) * | 2022-07-28 | 2022-10-21 | 广东采日能源科技有限公司 | Energy storage battery box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220124 Address after: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli new energy battery technology Co.,Ltd. Address before: 211100 No.15 Huashang Road, Airport Economic Development Zone, Jiangning District, Nanjing City, Jiangsu Province Patentee before: Jiangsu Tafel Power System Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |