CN212810468U - Battery pack for preventing thermal runaway - Google Patents
Battery pack for preventing thermal runaway Download PDFInfo
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- CN212810468U CN212810468U CN202020535139.7U CN202020535139U CN212810468U CN 212810468 U CN212810468 U CN 212810468U CN 202020535139 U CN202020535139 U CN 202020535139U CN 212810468 U CN212810468 U CN 212810468U
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- battery pack
- thermal runaway
- battery
- protective layer
- cover plate
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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 discloses a battery pack for protecting thermal runaway, which comprises a battery module, a high-voltage power connecting assembly, a battery pack box body and a cover plate; the apron is equipped with first inoxidizing coating, high pressure power coupling assembling be equipped with the second inoxidizing coating. The utility model discloses prevented that the battery package from passing through the apron because of thermal runaway and taking the passenger compartment with high temperature, the phenomenon of high-pressure power coupling assembling insulation failure and electric breakdown, the reliability of each part of battery package has further been compromise as a whole scheme to the system protection of the first inoxidizing coating of battery package apron surface cladding and the second inoxidizing coating of high-pressure power coupling assembling surface cladding, the systematic solution the safety risk that the thermal runaway of battery package brought.
Description
Technical Field
The utility model relates to an automobile battery technical field especially relates to a battery package of protection thermal runaway.
Background
In recent years, new energy automobiles develop rapidly, electric energy is an important power source of the new energy automobiles, and the battery pack is used as an energy carrier, so that certain potential safety hazards exist in the using process. The main components of the battery pack comprise a battery pack box body and a battery module fixed in the battery pack box body, the battery module is composed of single batteries, and the battery modules are connected in series or in parallel through a high-voltage power connecting assembly to obtain required voltage and current for the whole vehicle. The single battery can cause thermal runaway under the conditions of external collision, puncture, thermal influence and the like, the high-voltage power connecting assembly is usually arranged between the bag body and the installation module of the battery pack, the high-voltage power connecting assembly is positioned at the close positions such as the upper part or the side surface of the battery module and the like and is easily influenced by high-temperature airflow after the thermal runaway, particularly, after thermal runaway, high-temperature airflow sprayed out of the single battery explosion-proof valve can rush to the opposite battery pack box body and is discharged out of the battery pack through the explosion-proof valve of the battery pack, therefore, high-temperature airflow with specific pressure is formed in the battery pack, which can cause insulation failure of the high-voltage power connecting assembly caused by high temperature, position movement, electrical safety failure, and then form the short circuit to puncture battery package body, so not only can aggravate the emergence of thermal runaway, still can lead to the electric runaway, very big threat passenger's safety, this kind of condition has also restricted the development process of new forms of energy car to a certain extent.
In order to provide a safer battery pack technology, reduce risks caused by thermal runaway and improve the safety factor of a battery pack, a new thermal runaway prevention scheme is urgently needed to be proposed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery package of protection thermal runaway solves because the inside temperature that the thermal runaway brought sharply risees, leads to the apron to take place heat transfer, the technical problem of high-pressure power coupling assembling insulation failure.
In order to solve the technical problem, the utility model provides a battery pack for preventing thermal runaway, which comprises a battery module, a high-voltage power connecting assembly, a battery pack box body and a cover plate, wherein the battery pack box body is provided with an opening, the cover plate is arranged on the battery pack box body in a manner of sealing the opening, the battery module and the high-voltage power connecting assembly are both arranged inside the battery pack box body, and the high-voltage power connecting assembly is electrically connected with the battery module; the apron is equipped with first inoxidizing coating, high pressure power coupling assembling is equipped with the second inoxidizing coating.
Further, one side of the cover plate close to the inside of the battery pack box body is a first surface, one side of the cover plate far away from the inside of the battery pack box body is a second surface, and the first protective layer is arranged on the first surface.
Further, the second surface is coated with a third protection layer.
Further, the strength of the first protective layer is greater than that of the third protective layer.
Further, the first protective layer comprises a first insulating isolation layer and a reinforcing layer arranged outside the first insulating isolation layer.
Further, the third protection layer comprises a third insulating isolation layer.
Further, the first insulation isolation layer is made of any one or more of ceramic rubber, ceramic fiber, aerogel or high-temperature-resistant insulation paint.
Further, the material of the reinforcing layer is glass fiber cloth.
Further, the second protective layer is made of any one or more of mica tapes, mica plates, ceramic composite tapes and high-temperature-resistant insulating coatings.
Further, the first protective layer covers the outer surface of the cover plate, and the second protective layer covers the outer surface of the high-voltage power connection assembly.
Implement the utility model discloses, following beneficial effect has:
the utility model provides a battery package of protection thermal runaway, apron cladding inoxidizing coating, the battery package has been prevented to pass through the apron because of thermal runaway with high temperature and has been taken to the passenger cabin, high-pressure power coupling assembling's outside wrapping material replaces with high temperature resistant insulating and heat insulating material, the phenomenon of high-pressure system insulation failure and electric breakdown that leads to because of the high temperature has been improved, the system protection of the first inoxidizing coating of battery package apron surface cladding and the second inoxidizing coating of high-pressure power coupling assembling surface cladding is as a whole scheme, the reliability of each part of battery package has further been compromise, systematized solution the safety risk that the battery package thermal runaway brought.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a battery pack for protecting against thermal runaway according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a cover plate according to an embodiment of the present invention.
Wherein the reference numerals in the figures correspond to: the battery pack comprises a battery module 1, a battery pack box 2, a cover plate 3, a first surface 31, a second surface 32, a high-voltage power connecting assembly 4, a second protective layer 5, a first protective layer 6, a first insulating isolation layer 61, a reinforcing layer 62, a third protective layer 7 and a pressure release valve 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In the following description, for clarity and conciseness of description, not all of the various components shown in the figures have been described, which show the various components to provide a fully enabling disclosure of the present invention to those of ordinary skill in the art. The operation of many of the components is familiar and obvious to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defined as "first", "second" may explicitly or implicitly include one or more of those features, in the description of the invention "plurality" means two or more unless specifically defined otherwise.
As shown in fig. 1, the battery pack for preventing thermal runaway may include a battery module 1, a high voltage power connection assembly 4, a battery pack case 2 and a cover plate 3, wherein the battery modules 1 are formed by connecting single batteries in series and parallel on a physical structure and a circuit, and the single batteries are formed by combining a positive electrode, a negative electrode, an electrolyte, a diaphragm, a housing, an explosion-proof valve, a terminal and the like, and may realize direct conversion between electrical energy and chemical energy. The high-voltage power connection assembly 4 is not limited to other wires such as copper bars, aluminum bars and the like used for high-voltage conductive connection. The battery package box 2 can adopt materials such as steel, aluminum alloy casting, also can adopt other multiple lightweight materials preparation such as glass fiber reinforced composite, carbon fiber reinforcement base combined material, the utility model discloses do not injectd this. The battery pack further comprises a pressure release valve 8, a waterproof breathable film is arranged at the joint of the pressure release valve 8 and the battery pack box body 2, when thermal runaway occurs, pressure difference is generated inside and outside the battery pack due to the fact that products formed by battery temperature and chemical reaction inside the battery can cause, and pressure release is carried out through the pressure release valve 8 so as to keep pressure balance inside and outside the battery pack.
The apron 3 sets up the open-ended one side of battery package box 2 is in order to seal battery package box 2, the material of apron 3 is steel, in order to increase the temperature coefficient of the temperature resistant of apron 3 avoids the high temperature to lead to apron 3 to burn through. The battery module 1 and the high-voltage power connecting assembly 4 are both arranged inside the battery pack box body 2, and the high-voltage power connecting assembly 4 is electrically connected with the battery module 1; the battery package can also include other spare parts for this area conventional design such as overcurrent protection device, cooling interface, high pressure interface, supplementary low pressure interface, communication interface and battery management subassembly, the utility model discloses do not limit to this.
The cover plate 3 is provided with a first protective layer 6, the first protective layer 6 can be processed in the forms of coating, sticking, plastic spraying and the like, the first protective layer 6 effectively prevents flames or heat from diffusing to the upper side of the battery pack packaging body when thermal runaway occurs, the high-pressure power connecting assembly 4 is provided with a second protective layer 5, when the single battery thermal runaway occurs, high-temperature high-pressure airflow generated by chemical reaction rushes out from an explosion-proof valve port of the single battery, so that when the air pressure inside and outside the battery pack is unbalanced, the air is discharged from the pressure release valve 8 to form airflow, so that the high-pressure power connecting assembly 4 swings, the second protective layer 5 effectively avoids the situation that the high-pressure power connecting assembly 4 swings left and right to bring about the high-pressure power connecting assembly 4 when being impacted by hot airflow, and the high-pressure power connecting assembly 4 swings with the battery pack packaging, or the high-voltage power connecting assembly 4 is contacted with other parts and the like to cause insulation failure; the second protective layer 5 can also avoid the insulation failure of the high-voltage power connecting assembly 4 caused by temperature rise, so that the electric breakdown phenomenon between the high-voltage power connecting assembly 4 and the battery pack box body 3 is avoided, the risk of thermal runaway is reduced, and the conductive risk caused by electric breakdown is also avoided. The utility model discloses in, the first inoxidizing coating 6 that apron 3 set up and the system protection of the second inoxidizing coating 5 that high pressure power coupling assembling 4 set up further compromise the reliability of each part of battery package as a whole scheme, the systematic solution the safety risk that the battery package thermal runaway brought.
As shown in fig. 1 and 2, one side of the cover plate 3 close to the inside of the battery pack case 2 is a first surface 31, one side of the cover plate 3 far away from the inside of the battery pack case 2 is a second surface 32, and the first protective layer 6 is arranged on the first surface 31, so that the phenomena of insulation failure of an internal high-voltage device, electric breakdown caused by contact with the cover plate 3 and the like are effectively avoided.
As shown in fig. 2, the second surface 32 is coated with a third protection layer 7 to further prevent heat from being brought to the passenger compartment through the cover plate 3 when the battery pack is out of thermal control. The intensity of first inoxidizing coating 6 is greater than the intensity of third inoxidizing coating 7, because first inoxidizing coating 6 is close to inside battery package box 2, directly receive hot air current's atmospheric pressure when the thermal runaway and strike, this kind of setting has guaranteed the intensity of first inoxidizing coating 6 has improved the security of battery package.
As shown in fig. 2, the first protective layer 6 includes a first insulating spacer 61 and a reinforcement layer 62 disposed outside the first insulating spacer 61. The first insulation isolation layer 61 is made of any one or more of ceramic rubber, ceramic fiber, aerogel or high-temperature-resistant insulation paint, the reinforcing layer is made of a common reinforcing material in the field and can be made of fiberglass cloth and the like, the first protection layer 6 is composited outside the first insulation isolation layer 61 through the reinforcing layer 62 to obtain better performance, so that the first protection layer 6 has high-temperature-resistant insulation performance and ensures certain strength, and meanwhile, the reinforcing material can be composited at the lower part and the inner part of the first insulation isolation layer 61 to resist air pressure impact caused by hot air flow.
The third protection layer 7 includes the third insulation isolation layer, the material of third insulation isolation layer is arbitrary one or several kinds among ceramic rubber, ceramic fibre, aerogel or the high temperature resistant insulating coating, in order to guarantee the high temperature resistance, insulating properties and the heat-proof quality etc. of third insulation isolation layer, the utility model discloses do not do the injecion to this.
The material of second inoxidizing coating 5 is any one or several kinds in mica tape, mica plate, the compound area of pottery, the high temperature resistant insulating coating to guarantee high temperature resistant performance, insulating properties and the heat-proof quality etc. of second inoxidizing coating 5, the utility model discloses do not restrict this.
The first protective layer covers the outer surface of the cover plate, and the second protective layer covers the outer surface of the high-voltage power connecting assembly, so that the safety performance of the battery pack in thermal runaway is better improved.
The utility model has high safety factor, eliminates the temperature runaway and the electric runaway caused by the thermal runaway, solves the main safety factor caused by the thermal runaway at one time, and has simple and reliable scheme; the universality is high, and the improvement is carried out on the basis of not increasing the existing space of the battery pack.
The above disclosure is only illustrative of the preferred embodiments of the present invention, and should not be taken as limiting the scope of the invention, which is defined by the appended claims.
Claims (8)
1. A battery pack for preventing thermal runaway is characterized by comprising a battery module, a high-voltage power connecting assembly, a battery pack box body and a cover plate,
the battery pack box body is provided with an opening, the cover plate is arranged on the battery pack box body in a mode of closing the opening, the battery module and the high-voltage power connecting assembly are both arranged inside the battery pack box body, and the high-voltage power connecting assembly is electrically connected with the battery module; the apron is equipped with first inoxidizing coating, high pressure power coupling assembling is equipped with the second inoxidizing coating.
2. The battery pack for preventing thermal runaway of claim 1, wherein a side of the cover plate close to the inside of the battery pack case is a first surface, a side of the cover plate far away from the inside of the battery pack case is a second surface, and the first protective layer is disposed on the first surface.
3. The battery pack for preventing thermal runaway of claim 2, wherein the second surface is coated with a third protective layer.
4. The battery pack for preventing thermal runaway according to claim 3, wherein the strength of the first protective layer is greater than the strength of the third protective layer.
5. The battery pack for preventing thermal runaway of claim 3, wherein the first protective layer comprises a first insulating barrier layer and a reinforcing layer disposed outside the first insulating barrier layer.
6. The battery pack for preventing thermal runaway of claim 5, wherein the third protective layer comprises a third insulating isolation layer.
7. The battery pack for preventing thermal runaway according to claim 5, wherein the material of the reinforcing layer is glass fiber cloth.
8. The battery pack for protecting against thermal runaway of claim 1, wherein the first protective layer covers an outer surface of the cover plate, and the second protective layer covers an outer surface of the high voltage power connection assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020535139.7U CN212810468U (en) | 2020-04-13 | 2020-04-13 | Battery pack for preventing thermal runaway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020535139.7U CN212810468U (en) | 2020-04-13 | 2020-04-13 | Battery pack for preventing thermal runaway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212810468U true CN212810468U (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020535139.7U Active CN212810468U (en) | 2020-04-13 | 2020-04-13 | Battery pack for preventing thermal runaway |
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| CN (1) | CN212810468U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024003472A1 (en) * | 2022-06-28 | 2024-01-04 | Stellantis Auto Sas | System for applying thermal protection to a traction battery based on spray coating, method and vehicle based on such a system |
-
2020
- 2020-04-13 CN CN202020535139.7U patent/CN212810468U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024003472A1 (en) * | 2022-06-28 | 2024-01-04 | Stellantis Auto Sas | System for applying thermal protection to a traction battery based on spray coating, method and vehicle based on such a system |
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