CN219959224U - Battery module and battery package with thermal runaway safeguard function - Google Patents
Battery module and battery package with thermal runaway safeguard function Download PDFInfo
- Publication number
- CN219959224U CN219959224U CN202320975247.XU CN202320975247U CN219959224U CN 219959224 U CN219959224 U CN 219959224U CN 202320975247 U CN202320975247 U CN 202320975247U CN 219959224 U CN219959224 U CN 219959224U
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- Prior art keywords
- battery module
- assembly
- thermal runaway
- upper shell
- protective cover
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- 230000001681 protective effect Effects 0.000 claims abstract description 37
- 230000003313 weakening effect Effects 0.000 claims abstract description 15
- 239000011810 insulating material Substances 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000002829 reductive effect Effects 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 239000010445 mica Substances 0.000 description 4
- 229910052618 mica group Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a battery module with a thermal runaway protection function and a battery pack, and relates to the technical field of battery packs, comprising the following steps: the battery module is provided with an upper shell assembly above the battery module, the upper shell assembly comprises an upper shell and a protection plate, the protection plate is located below the upper shell, a plurality of openings are formed in the surface of the upper shell, the protection plate performs weakening treatment at the position corresponding to the openings of the upper shell, a protective cover assembly is arranged above the upper shell assembly, the protective cover assembly performs weakening treatment at the position corresponding to the openings of the upper shell, and a lower shell assembly is arranged below the battery module; the battery module further comprises a front end plate assembly and a rear end plate assembly, when the module is in thermal runaway, the pressure in the module is increased, and the protection cover outside the module is weakened so as to be beneficial to heat dissipation and pressure reduction; in addition, by adopting the battery module, the time of thermal runaway is improved by 2-3 times compared with the time of thermal runaway in an open environment or a closed environment.
Description
Technical Field
The present utility model relates to battery packs, and particularly to a battery module with thermal runaway protection function and a battery pack.
Background
The safety problem is one of the severe problems faced by the current new energy automobile battery system. The root cause of the ignition is the unit cell module height Wen Zhaohuo, thereby causing the entire module and the battery pack to catch fire, and passengers bring about safety risks. Through a large number of experiments and principle analyses, there are two main reasons for causing thermal diffusion of the module: firstly, after thermal runaway occurs in a battery module, generated heat and gas cannot be timely discharged out of the module, heat is transferred to adjacent battery modules in a short time, and the runaway is triggered in sequence, so that the runaway of the whole module and a battery pack is triggered; and secondly, the thermal protection of the adjacent modules is insufficient.
Unlike square cases, soft-pack batteries generally have no directional exhaust passage when thermal runaway occurs, and high-temperature gas cannot be effectively discharged out of the battery in time, which easily causes thermal runaway to cause greater safety problems. The prior art mainly has the following protection methods for thermal runaway of the soft package battery: firstly, an exhaust hole is added, but the method can cause the overlarge area of the shell opening of the module, so that the cleanliness is difficult to control in the processes of assembly, transportation and the like, customer complaints are easy to cause, if metal impurities enter, the battery module is easy to be cut to cause short circuit, safety problems are caused, and moreover, the overlarge area of the shell opening of the module can cause the large influence on the overall mechanical strength, so that the mechanical performance is difficult to ensure; secondly, the protection of the high-voltage electric appliance is increased, but the method has higher requirements on local structural space, increases working procedures in the production, assembly and other processes, has adverse effects on production takt, material management and the like, thirdly, the energy of the internal battery module is adjusted, but the method has a certain influence on energy density, and the electrical performance risk is high, so that a thermal runaway protection method or device is needed to solve the problem that when thermal runaway occurs, high-temperature gas is effectively discharged out of the battery in time, thereby avoiding heat spreading, and meanwhile, the structure is simple and the cost is low.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a technical scheme that: the protection structure is designed at the top of the opening, so that the cleanliness can be effectively controlled, foreign matters are prevented from entering, and collision and short circuit can be protected to a certain extent in the process of battery transportation and assembly; the area of the protection plate subjected to weakening treatment is opened when the internal pressure is high, and the heat insulation effect is achieved; the inner side and the outer side of the high-voltage end of the battery module are both provided with protective structures, so that heat spreading is avoided; meanwhile, the utility model has the advantages of simple structure, more friendly material processing, production and manufacturing and larger cost advantage.
Specifically, in a first aspect, the present utility model provides a battery module having a thermal runaway protection function, including: the battery module is provided with an upper shell assembly above the battery module, the upper shell assembly comprises an upper shell and a protection plate, the protection plate is located below the upper shell, a plurality of openings are formed in the surface of the upper shell, the protection plate performs weakening treatment at the position corresponding to the openings of the upper shell, a protective cover assembly is arranged above the upper shell assembly, the protective cover assembly performs weakening treatment at the position corresponding to the openings of the upper shell, and a lower shell assembly is arranged below the battery module; the battery module further includes a front end plate assembly and a rear end plate assembly.
Preferably, the lower housing assembly includes a lower housing and a heat shield, the lower housing and the heat shield forming a U-shaped structure.
Preferably, the protective cover assembly has a U-shaped structure and covers the outer surface of the battery module.
Preferably, the protective cover assembly comprises a protective cover and high-temperature glue, and the inner testing three sides of the protective cover are all provided with the high-temperature glue.
Preferably, the areas of the protective cover assembly that are weakened are free of high temperature glue.
Preferably, the shield is a high temperature resistant insulating material such as mica or other insulating material having high temperature resistance.
Preferably, the shield is a high temperature resistant insulating material such as mica or other insulating material having high temperature resistance.
Preferably, the front end plate assembly and the rear end plate assembly are effectively matched with the upper shell assembly, the lower shell assembly and the protective cover assembly to isolate the battery module from the outside.
Preferably, the positions of the holes of the protection plate are uniformly distributed at the positions where the electric cores are arranged.
In a second aspect, the present utility model provides a battery pack, where the battery pack includes the battery module provided in any embodiment of the present utility model.
The utility model has the following beneficial effects: (1) When a certain cell in the protection plate is out of control, the internal pressure of the module is increased, and the protection cover outside the module is weakened, so that heat dissipation and pressure reduction are facilitated; meanwhile, the position and the size of the opening of the protection plate cover each cell, high-temperature gas can be quickly released from the opening under the condition that any cell is out of control, an invisible channel is potentially created for the soft package battery, the high-temperature gas is effectively released in time, the pressure and the temperature in the module can be effectively reduced, and the risk of thermal control of other cells and even other modules can be greatly reduced. In addition, if similar modules in the battery pack have thermal runaway, the protection plate, the heat insulation plate and the protection cover are all made of fireproof insulating materials, so that the influence of external high temperature on the modules is blocked or reduced.
(2) According to the utility model, all the shells, the protection plates and the protection covers are designed to have an open pore structure, high-temperature gas can be instantaneously released to the outside of the module, the internal heat diffusion speed can be effectively slowed down, all the protection plates are made of fireproof materials, and the heat triggering of external high temperature or fire sources to the inside of the battery can be effectively slowed down. All materials are conventional battery protection materials, and the battery protection device has the advantages of simple structure, convenience in processing and forming, small occupied space and great friendliness to cost price, manufacturing process and space arrangement.
(3) Through actual thermal runaway tests, the battery module is tested in an open environment or a closed environment simulating a battery pack structure, and the time of thermal runaway is improved by 2-3 times compared with the prior time.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery module with thermal runaway protection function according to an embodiment of the present utility model;
fig. 2 is an overall exploded view of a battery module according to an embodiment of the present utility model;
fig. 3 is a top view of a battery module according to an embodiment of the present utility model;
fig. 4 is a schematic structural view of a protective cover assembly according to an embodiment of the present utility model.
Reference numerals:
1. a battery module; 2. an upper housing assembly; 2.1, an upper shell; 2.2, protecting plates; 3. a lower housing assembly; 3.1, a lower shell; 3.2, insulating board; 4. a front end plate assembly; 5. a rear end plate assembly; 6. a battery cell; 7. a protective cover assembly; 7.1, a protective cover; 7.2, high-temperature glue.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.
In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements 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 utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1-4, a battery module with thermal runaway protection function according to an embodiment of the present utility model includes a battery module 1, an upper case assembly 2, a lower case assembly 3, a front end plate assembly 4, a rear end plate assembly 5, and a protection cover assembly 7.
Specifically, an embodiment of the present utility model provides a battery module with a thermal runaway protection function, including: the battery module 1, the top of battery module 1 is provided with upper casing subassembly 2, upper casing subassembly 2 includes upper casing 2.1 and guard plate 2.2, guard plate 2.2 is located the below of upper casing 2.1, the surface of upper casing 2.1 is provided with a plurality of trompil, guard plate 2.2 carries out the weakening at the trompil position that corresponds upper casing 2.1, upper casing subassembly 2's top is provided with protection casing subassembly 7, protection casing subassembly 7 carries out the weakening at the trompil position that corresponds upper casing 2.1, the below of battery module 1 is provided with lower casing subassembly 3; the battery module 1 further includes a front end plate assembly 4 and a rear end plate assembly 5.
In this embodiment, lower casing subassembly 3 includes lower casing 3.1 and heat insulating board 3.2, and U type structure is constituteed to lower casing 3.1 and heat insulating board 3.2, and heat insulating board 3.2 arranges in the both sides of battery module 1, with the inside both sides laminating of lower casing 3.1 for strengthen the thermal protection of battery module 1 both sides, play certain guard action when the condition of thermal shock takes place for battery module 1 both sides.
In this embodiment, the protective cover assembly 7 has a U-shaped structure, and the protective cover assembly 7 covers the outer surface of the battery module 1.
In this embodiment, the protective cover assembly 7 includes a protective cover 7.1 and a high temperature adhesive 7.2, the inner testing three sides of the protective cover 7.1 are all provided with the high temperature adhesive 7.2, the protective cover 7.1 covers the outer surface of the battery module 1, wherein the upper surface is at the position corresponding to the opening on the upper casing 2.1, the weakening treatment is needed, such as pre-cutting and thinning, the high temperature adhesive 7.2 is arranged at the inner side of the protective cover 7.1 and is adhered to the outer side of the battery module, the positions of the high temperature adhesive 7.2 are designed on three sides, but the opening position cannot be provided with the high temperature adhesive 7.2, and the high temperature adhesive 7.2 can ensure that the protective cover 7.1 is tightly adhered to the battery module 1 in the high temperature environment.
In this embodiment, the area of the protective cover assembly 7 that is weakened is free of the high temperature glue 7.2.
In this embodiment the protective cover 7.1 is a fire-resistant material, such as mica or other insulating material with high temperature resistance.
In this embodiment, the protection plate 2.2 is a high temperature resistant insulating material, such as mica or other insulating material with high temperature resistance; the weakening is performed at the position corresponding to the opening of the upper casing 2.1 with the aim of: insulation and heat insulation, which prevents external high-temperature gas or spark from entering the battery module 1 to a certain extent, and causes thermal runaway inside; when thermal runaway occurs in the battery module 1, the weakening area can be instantaneously broken through by weakening treatment, and high-temperature gas is released outwards from the opening part of the shell, so that the speed of thermal diffusion in the battery module 1 is slowed down.
In this embodiment, the front end plate assembly 4 and the rear end plate assembly 5 effectively cooperate with the upper case assembly 2, the lower case assembly 3 and the protective cover assembly 7 to isolate the battery module 1 from the outside.
In this embodiment, the positions of the openings of the protection plate 2.2 are uniformly distributed at the positions where the battery cells 6 are arranged.
The utility model also provides a battery pack, which comprises the battery module 1 provided by any embodiment of the utility model, in the battery pack, if the surrounding battery modules 1 are out of control, the protective cover 7.1 can block high-temperature gas to a great extent, the battery module 1 is protected from being reduced, delayed or prevented from being triggered by heat, and if the wrapped battery modules 1 are out of control, the internal high-temperature gas can be released from the weakening position, so that the heat spreading of the battery module is reduced or delayed.
In this embodiment, the number and positions of the holes are not specifically required, and it is recommended that the holes are uniformly distributed at the positions where the electric cores are arranged, so as to ensure that any electric core is out of control thermally, and high-temperature gas can be timely and effectively discharged. However, according to practical situations, the non-uniform distribution or the arrangement on two sides and the like are also within the protection scope of the proposal; the protection cover 7.1 covers the top and two sides of the battery module 1, is arranged on the front side of the battery module 1, and is mainly protected on the top and two sides in consideration of the application and arrangement conditions of the product in the embodiment, such as different arrangements of other battery packs, battery modules and battery cores, and the required key protection positions, areas, sizes and other adjustment are also in the protection scope of the proposal.
The working principle of the technical scheme is as follows: when a certain cell 6 in the protective plate 2.2 is out of control, the internal pressure of the battery module 1 is increased, and the protective cover 7.1 outside the module is weakened, so that heat dissipation and pressure reduction are facilitated; meanwhile, the position and the size of the opening of the protection plate 2.2 are covered on each cell 6, high-temperature gas can be rapidly released from the opening under the condition that any cell 6 is out of control, a hidden channel is potentially created for the soft package battery, the high-temperature gas is effectively released in time, the pressure and the temperature in the module can be effectively reduced, and the risk of thermal control of other cells and even other modules is greatly reduced. In addition, if similar modules in the battery pack have thermal runaway, the protection plate 2.2, the heat insulation plate 3.2 and the protection cover 7.1 are all made of fireproof materials, so that the influence of external high temperature on the modules is blocked or reduced. According to the utility model, all the shells, the protection plates 2.2 and the protection cover 7.1 are designed with open pore structures, high-temperature gas can be instantaneously released to the outside of the module, the internal heat diffusion speed can be effectively slowed down, all the protection plates 2.2 are made of fireproof insulating materials, and the heat triggering of external high temperature or fire sources to the inside of the battery can be effectively slowed down. All materials are conventional battery protection materials, and the battery protection device has the advantages of simple structure, convenience in processing and forming, small occupied space and great friendliness to cost price, manufacturing process and space arrangement. Through actual thermal runaway tests, the battery module is tested in an open environment or a closed environment simulating a battery pack structure, and the time of thermal runaway is improved by 2-3 times compared with the prior time.
The above is only a preferred embodiment of the present utility model; the scope of the utility model is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present utility model, and the technical solution and the improvement thereof are all covered by the protection scope of the present utility model.
Claims (10)
1. A battery module having a thermal runaway protection function, comprising: the battery module is characterized in that an upper shell assembly is arranged above the battery module and comprises an upper shell and a protection plate, the protection plate is located below the upper shell, a plurality of holes are formed in the surface of the upper shell, the protection plate is subjected to weakening treatment at the position corresponding to the holes of the upper shell, the weakening treatment is to increase pre-cutting or thinning, a protective cover assembly is arranged above the upper shell assembly, the protective cover assembly is subjected to weakening treatment at the position corresponding to the holes of the upper shell, and a lower shell assembly is arranged below the battery module; the battery module further includes a front end plate assembly and a rear end plate assembly.
2. The battery module with a thermal runaway prevention function according to claim 1, wherein the lower case assembly includes a lower case and a heat insulation plate, the lower case and the heat insulation plate constituting a U-shaped structure.
3. The battery module with a thermal runaway protection function according to claim 1 or 2, wherein the protective cover assembly has a U-shaped structure, and the protective cover assembly covers the outer surface of the battery module.
4. A battery module with thermal runaway protection function according to claim 3, wherein the protective cover assembly comprises a protective cover and a high temperature glue, and the high temperature glue is provided on each inner side of the protective cover.
5. The battery module with thermal runaway protection as defined in claim 4, wherein the weakened areas of the cover assembly are free of high temperature glue.
6. The battery module with thermal runaway protection function according to claim 5, wherein the protective cover is a high-temperature resistant insulating material.
7. The battery module with a thermal runaway protection function according to claim 1, wherein the protection plate is a high-temperature resistant insulating material.
8. The battery module with thermal runaway protection function of claim 7, wherein the front end plate assembly, the rear end plate assembly, the upper housing assembly, the lower housing assembly, and the protective cover assembly are operatively engaged to isolate the battery module from the outside.
9. The battery module with the thermal runaway protection function according to claim 1, wherein the positions of the openings of the protection plate are uniformly distributed at the positions where the electric cells are arranged.
10. A battery pack, characterized in that the battery pack comprises the battery module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320975247.XU CN219959224U (en) | 2023-04-26 | 2023-04-26 | Battery module and battery package with thermal runaway safeguard function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320975247.XU CN219959224U (en) | 2023-04-26 | 2023-04-26 | Battery module and battery package with thermal runaway safeguard function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219959224U true CN219959224U (en) | 2023-11-03 |
Family
ID=88550468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320975247.XU Active CN219959224U (en) | 2023-04-26 | 2023-04-26 | Battery module and battery package with thermal runaway safeguard function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219959224U (en) |
-
2023
- 2023-04-26 CN CN202320975247.XU patent/CN219959224U/en active Active
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