CN216563418U - Battery capable of preventing thermal diffusion - Google Patents

Battery capable of preventing thermal diffusion Download PDF

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Publication number
CN216563418U
CN216563418U CN202123408256.0U CN202123408256U CN216563418U CN 216563418 U CN216563418 U CN 216563418U CN 202123408256 U CN202123408256 U CN 202123408256U CN 216563418 U CN216563418 U CN 216563418U
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battery
explosion
proof structure
proof
heat diffusion
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CN202123408256.0U
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贺文文
鞠林润
范登科
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Gotion High Tech Co Ltd
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Gotion High Tech Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Abstract

The utility model provides a battery for preventing thermal diffusion, which relates to the technical field of batteries and comprises a hollow battery shell, an electric core accommodated in the battery shell and a pole assembly hermetically assembled on the battery shell, wherein an explosion-proof structure is arranged on the battery shell, the explosion-proof structure and the pole assembly are respectively arranged on different end surfaces of the battery shell, and an exhaust support structure is arranged between the explosion-proof structure and the electric core. According to the utility model, the explosion-proof structure and the pole assembly are respectively arranged on different end faces, so that the thermal runaway can be prevented from diffusing among the batteries, and the battery cell can be prevented from blocking the explosion-proof structure through the exhaust support structure, so that the phenomenon of aggravation of the thermal runaway of the battery is avoided, and the use safety of the battery is improved.

Description

Battery capable of preventing thermal diffusion
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery capable of preventing heat diffusion.
Background
The lithium battery has the advantages of high energy density, long service life and the like, and is widely applied to electric automobiles, standby power supply systems and micro-grid energy storage systems. The power lithium battery comprises a roll core, electrolyte, a shell, a cover plate and other structures. In terms of the structural design of the battery, in order to improve the safety performance of the battery, an explosion-proof valve is usually added on a battery cover plate, and the battery is decompressed through the explosion-proof valve when the battery is in an abnormal state and thermal runaway. The design position of traditional explosion-proof valve is at the top of battery, but battery utmost point post position and insulating position all are at the top of battery among the above-mentioned explosion-proof valve design, and explosion-proof valve can open when battery abnormal conditions thermal runaway, and the high temperature high pressure injection body blowout such as electrolyte in the battery. The battery pole is annotated to easy pollution battery after high pressure and high temperature electrolyte blowout, also can be with heat diffusion to other batteries simultaneously, further aggravates battery thermal runaway, and this has increased battery thermal runaway safety risk. The above drawbacks are intended to be overcome by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above defects in the prior art, embodiments of the present invention provide a battery for preventing thermal diffusion, in which an explosion-proof structure and a terminal assembly are respectively disposed on different end surfaces, so as to prevent thermal runaway from diffusing among batteries, and an exhaust support structure is used to prevent a battery cell from blocking the explosion-proof structure, thereby avoiding aggravation of thermal runaway of the battery, and improving safety of the battery.
The above object of the present invention can be achieved by the following technical solutions, and the present invention provides a thermal diffusion prevention battery, including a hollow battery case, a battery cell accommodated in the battery case, and a post assembly hermetically assembled on the battery case, wherein the battery case is provided with an explosion-proof structure, the explosion-proof structure and the post assembly are respectively disposed on different end surfaces of the battery case, and an exhaust support structure is disposed between the explosion-proof structure and the battery cell.
In a preferred embodiment of the present invention, the exhaust support structure includes at least one support portion, and the support portion is supported and disposed between the explosion-proof structure and the battery cell.
In a preferred embodiment of the present invention, the plurality of supporting portions are disposed between the explosion-proof structure and the battery cell at intervals, a pressure relief channel is formed in an area sandwiched by the supporting portions, and the explosion-proof structure is disposed at one end of the pressure relief channel.
In a preferred embodiment of the present invention, the support portion includes a first end connected to the battery case and a second end overlapping the battery cell.
In a preferred embodiment of the utility model, the explosion-proof structure comprises at least one explosion-proof valve, which is connected to the battery housing.
In a preferred embodiment of the present invention, a step sinking groove matched with the explosion-proof valve is formed in the battery case, and the explosion-proof valve is hermetically connected to the step sinking groove.
In a preferred embodiment of the present invention, the pole assembly includes a first pole and a second pole, and both the first pole and the second pole are hermetically assembled on the battery housing.
In a preferred embodiment of the present invention, the first terminal post and the second terminal post are spaced apart from each other and disposed on a same end surface of the battery case.
In a preferred embodiment of the present invention, the battery case is provided with a liquid injection hole.
In a preferred embodiment of the present invention, the liquid injection hole and the pole assembly are disposed on the same end surface of the battery case.
In a preferred embodiment of the present invention, the battery housing includes a housing body and at least one mounting end cap sealingly assembled to the housing body.
In a preferred embodiment of the present invention, the explosion-proof structure is disposed on the mounting end cap, and the pole assembly is hermetically assembled on the housing main body.
In a preferred embodiment of the present invention, the mounting end cap is sealingly assembled at the bottom of the housing body along the gravity direction, and the pole assembly is sealingly assembled at the top of the housing body relative to the mounting end cap.
The technical scheme of the utility model has the following remarkable beneficial effects:
this application in the battery that prevents heat diffusion, be provided with explosion-proof construction on battery case, when electric core emergence thermal runaway, can discharge in order to reach the pressure release purpose through high pressure and high temperature electrolyte etc. in explosion-proof construction with the battery. Through setting up explosion-proof construction and utmost point post subassembly respectively on battery case's different terminal surfaces, when explosion-proof construction pressure release, can prevent that the highly compressed electrolyte of high temperature from diffusing utmost point post subassembly, avoided utmost point post subassembly to receive the pollution.
Further, when the battery uses in groups, through setting up explosion-proof structure and utmost point post subassembly on different terminal surfaces, when a battery takes place the thermal runaway pressure release, can avoid other batteries and its utmost point post subassembly to receive the high temperature electrolyte to influence and take place the thermal runaway with the highly compressed electrolyte of high temperature quick discharge battery, can prevent that the thermal runaway phenomenon from diffusing between the battery for the battery has higher security when using in groups.
And through set up the exhaust bearing structure between explosion-proof structure and electric core, can prevent that the electric core from blockking up explosion-proof structure, be favorable to leading out high temperature high pressure electrolyte when the battery thermal runaway fast smoothly, avoid the electric core to block up explosion-proof structure and cause the aggravation of thermal runaway, improved the safety in utilization of battery.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced 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 to obtain other drawings based on these drawings without creative efforts.
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the utility model as a matter of case.
Fig. 1 is an exploded structural view of a battery for preventing heat diffusion;
FIG. 2 is a schematic view of a pole assembly mounting structure;
fig. 3 is a schematic view of an explosion-proof structure mounting structure.
Reference numerals of the above figures:
1. a battery case; 11. sinking a step into a groove; 12. a liquid injection hole; 13. a housing main body; 14. an end cover is arranged at the bottom; 15. the top is provided with an end cover;
2. a pole assembly; 21. a first pole column; 22. a second pole;
3. an explosion-proof structure; 31. an explosion-proof valve;
4. an exhaust support structure; 41. a support portion;
5. and (5) battery cores.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The position that explosion-proof valve set up among the prior art is at the top of battery, but battery utmost point post position and insulating position all are at the top of battery in this kind of explosion-proof valve setting scheme, and explosion-proof valve can open when battery abnormal state thermal runaway, and the high temperature high pressure jet body blowout such as electrolyte in the battery. Pollute the battery pole and annotate easily after high pressure and high temperature electrolyte blowout, also can further aggravate battery thermal runaway to other batteries simultaneously, increased battery thermal runaway safety risk. This application mainly utilizes the battery that prevents thermal diffusion to avoid explosion-proof valve pressure release in-process with thermal runaway to spread to other batteries.
Referring to fig. 1 to 3, the present application provides a battery for preventing thermal diffusion, where the battery for preventing thermal diffusion includes a hollow battery case 1, a battery cell 5 accommodated in the battery case 1, and a terminal assembly 2 hermetically assembled on the battery case 1, an explosion-proof structure 3 is disposed on the battery case 1, the explosion-proof structure 3 and the terminal assembly 2 are respectively disposed on different end surfaces of the battery case 1, and an exhaust support structure 4 is disposed between the explosion-proof structure 3 and the battery cell 5.
On the whole, the battery that prevents thermal diffusion that this application provided, when electric core 5 takes place the thermal runaway, it is through setting up the discharge such as high pressure and high temperature electrolyte in battery case 1 on the explosion-proof structure 3 with the battery in order to reach the pressure release purpose. Through setting up explosion-proof construction 3 and utmost point post subassembly 2 respectively on battery case 1's the different terminal surfaces, can prevent that the highly compressed electrolyte of high temperature from diffusing utmost point post subassembly 2, avoided utmost point post subassembly 2 to receive the pollution. The battery for preventing heat diffusion can be used alone or in a plurality of groups. When the battery is used in groups, the anti-explosion structure 3 can be arranged on the same side, the anti-explosion structure 3 and the pole assembly 2 can be arranged on different end faces, when one of the batteries is subjected to thermal runaway pressure relief, the high-temperature and high-pressure electrolyte can be rapidly discharged out of the battery, the other batteries and the pole assembly 2 thereof are prevented from being influenced by the high-temperature electrolyte to cause thermal runaway, and the thermal runaway phenomenon can be prevented from being diffused among the batteries. And through setting up exhaust bearing structure 4, be favorable to exporting high temperature high pressure electrolyte fast smoothly when the battery thermal runaway, avoid electric core 5 to block up explosion-proof structure 3 and cause the thermal runaway aggravation.
In the description of the present application, reference will be made to the detailed description of the embodiments and the accompanying drawings.
Specifically, referring to fig. 1 to 3, the battery for preventing heat diffusion may include: a battery case 1; a pole assembly 2; an explosion-proof structure 3; an exhaust support structure 4; and (5) an electric core.
In the present embodiment, the exhaust support structure 4 includes at least one support portion 41, and the support portion 41 is supported and disposed between the explosion-proof structure 3 and the battery cell 5. Support electric core 5 through supporting part 41, prevent that electric core 5 from blockking up explosion-proof structure 3 for explosion-proof structure 3 can the full play explosion-proof function, has increased the security that the battery used. Specifically, the supporting portion 41 may be provided in a plurality of numbers, the supporting portion 41 is arranged around the explosion-proof structure 3 and between the battery cells 5 at intervals, a pressure relief channel is formed in an area sandwiched by the supporting portion 41, and the explosion-proof structure 3 is arranged at one end of the pressure relief channel. The pressure relief channel formed by the supporting part 41 is beneficial to leading high-temperature and high-pressure electrolyte to the explosion-proof structure 3, and then the electrolyte can be discharged through the explosion-proof structure 3 to play a pressure relief role.
The support portion 41 includes a first end connected to the battery case 1 and a second end overlapping with the battery cell 5. By connecting the support portion 41 to the battery case 1, the support portion 41 can be prevented from rattling within the battery. And can support electric core 5 through supporting part 41, make electric core 5 fix in battery case 1 more steadily.
In the present embodiment, the explosion-proof structure 3 includes at least one explosion-proof valve 31, and the explosion-proof valve 31 is connected to the battery case 1. When the battery thermal runaway, the high-temperature and high-pressure electrolyte can break the explosion-proof valve 31, and then the pressure relief effect is achieved. The user can reasonably select various types of explosion-proof valves 31 or other explosion-proof structures 3 with the same functions as the explosion-proof valves 31 according to the needs, and the use is not limited here.
Further, in order to enable the explosion-proof valve 31 to be more conveniently installed, in the present embodiment, a step sinking groove 11 matched with the explosion-proof valve 31 is provided on the battery case 1, and the explosion-proof valve 31 is hermetically connected in the step sinking groove 11. During installation, the explosion-proof valve 31 can be more accurately positioned to the installation position through the step sink 11, and then the explosion-proof valve 31 can be welded in the step sink 11 by adopting a welding manner.
In this embodiment, the pole assembly 2 includes a first pole 21 and a second pole 22, and the first pole 21 and the second pole 22 are sealed and assembled on the battery housing 1. The first pole post 21 and the second pole post 22 can be connected to a conductor for outputting an electric current. Specifically, in order to make the pole assembly 2 more convenient to use, the first pole 21 and the second pole 22 are disposed on the same end surface of the battery case 1 at intervals. The first pole post 21 and the second pole post 22 are arranged on the same end face, so that the connecting wire outputs current conveniently.
In this embodiment, the battery case 1 is provided with a liquid inlet 12. Specifically, the liquid inlet 12 and the post assembly 2 may be provided on the same end surface of the battery case 1. Electrolyte can be injected into the battery or used for exhausting air through the liquid injection hole 12, and the battery is favorably used.
In the present embodiment, in order to facilitate the assembly of the battery, the battery housing 1 includes a housing body 13 and at least one mounting end cap assembled on the housing body 13 in a sealing manner. The cell 5 can be mounted in the battery housing 1 by opening the mounting end cap, making the battery assembly process more convenient and efficient.
In this embodiment, the explosion-proof structure 3 may be disposed on the mounting end cap, and the pole assembly 2 is hermetically assembled on the housing body 13. Through installing explosion-proof construction 3 on the installation end cover, this kind of mode has less destruction to casing main part 13 when making installation explosion-proof construction 3, makes casing main part 13's structure more complete, can strengthen casing main part 13's pressure-bearing performance.
Specifically, the mounting end cap is hermetically assembled at the bottom of the housing body 13 along the gravity direction to form a bottom mounting end cap 14, and the pole assembly 2 is hermetically assembled at the top of the housing body 13 relative to the bottom mounting end cap 14. Further, a top mounting end cap 15 may be formed by attaching a top mounting end cap to the housing body 13 in a sealing manner, and the pole assembly 2 may be attached to the top mounting end cap 15 in a sealing manner. Of course, the user can also dispose the explosion-proof structure 3 on the side wall of the housing main body 13, which is not limited herein. Adopt this kind of mode of setting up, when the thermal runaway pressure release of battery, the highly compressed electrolyte of high temperature can break explosion-proof structure 3 and erupt the battery to discharge under the action of gravity, because explosion-proof structure 3 sets up in the bottom of battery, make electrolyte can not spread to the battery on, and then avoid high temperature electrolyte to make the thermal runaway aggravation of battery. Especially when the battery is used in groups, after one battery is subjected to thermal runaway pressure relief, the ejected high-temperature electrolyte cannot be diffused to other batteries, so that the conduction phenomenon of the thermal runaway phenomenon between the battery packs is avoided, and the battery pack is safer in use.
When the battery is used, the battery shell 1 is provided with the explosion-proof structure 3, and when the battery core 5 is out of control due to heat, high-pressure and high-temperature electrolyte and the like in the battery can be discharged through the explosion-proof structure 3 so as to achieve the purpose of pressure relief. Because explosion-proof structure 3 and utmost point post subassembly 2 set up respectively on battery case 1's different terminal surfaces, when explosion-proof structure 3 pressure release, can prevent that the highly compressed electrolyte of high temperature from diffusing utmost point post subassembly 2, avoided utmost point post subassembly 2 to receive the pollution. Furthermore, when the battery is used in groups, the explosion-proof structure 3 and the pole assembly 2 are arranged on different end faces, when one battery is subjected to thermal runaway pressure relief, the high-temperature and high-pressure electrolyte can be quickly discharged out of the battery, other batteries and the pole assembly 2 are prevented from being influenced by the high-temperature electrolyte to cause thermal runaway, and the thermal runaway phenomenon can be prevented from diffusing among the batteries. And through set up exhaust bearing structure 4 between blast resistant construction 3 and electric core 5, can prevent that electric core 5 from blockking up blast resistant construction 3, be favorable to exporting high temperature high pressure electrolyte fast smoothly when battery thermal runaway, avoid electric core 5 to block up blast resistant construction 3 and cause the aggravation of battery thermal runaway.
The utility model has the advantages that the explosion-proof structure 3 and the pole post assembly 2 are respectively arranged on different end surfaces, so that the diffusion of thermal runaway between batteries can be prevented, the battery core 5 can be prevented from blocking the explosion-proof structure 3 through the exhaust supporting structure 4, the phenomenon of aggravation of the thermal runaway of the batteries is avoided, and the use safety of the batteries is improved.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, component, part, or step as well as other elements, components, parts, or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (13)

1. The utility model provides a prevent battery of thermal diffusion, its characterized in that, prevent battery of thermal diffusion include hollow battery casing, accept in electric core and sealed group in the battery casing connect in utmost point post subassembly on the battery casing, the last explosion-proof structure that is equipped with of battery casing, explosion-proof structure with utmost point post subassembly sets up respectively on battery casing's the different terminal surfaces, explosion-proof structure with be provided with exhaust bearing structure between the electric core.
2. The battery of claim 1, wherein the vent support structure comprises at least one support portion that supports the explosion proof structure disposed between the cell and the battery cell.
3. The battery for preventing heat diffusion according to claim 2, wherein the supporting portion is provided in plurality, the supporting portion is arranged around and spaced between the explosion-proof structure and the battery cell, a pressure relief channel is formed in an area sandwiched by the supporting portions, and the explosion-proof structure is arranged at one end of the pressure relief channel.
4. The battery of any of claims 2-3, wherein the support portion comprises a first end coupled to the battery case and a second end overlapping the cell.
5. The battery of claim 1, wherein the explosion-proof structure comprises at least one explosion-proof valve, the explosion-proof valve interfacing with the battery housing.
6. The battery for preventing heat diffusion according to claim 5, wherein the battery case is provided with a stepped depressed groove matched with the explosion-proof valve, and the explosion-proof valve is hermetically coupled in the stepped depressed groove.
7. The battery of claim 1, wherein the post assembly comprises a first post and a second post, both of which are sealingly assembled to the battery housing.
8. The heat diffusion preventing battery of claim 7, wherein the first and second terminal posts are spaced apart on the same end face of the battery case.
9. The battery for preventing heat diffusion according to claim 1, wherein a liquid injection hole is provided in the battery case.
10. The battery of claim 9, wherein the electrolyte injection hole is provided on the same end face of the battery case as the terminal assembly.
11. The heat diffusion protected battery of claim 1, wherein said battery housing comprises a housing body and at least one mounting end cap sealingly assembled to said housing body.
12. The heat diffusion preventing battery according to claim 11, wherein the explosion proof structure is provided on the mounting end cap, and the terminal assembly is sealingly assembled to the case body.
13. The heat diffusion protected battery of claim 12, wherein the mounting end cap is sealingly assembled at the bottom of the housing body in the direction of gravity, and the post assembly is sealingly assembled at the top of the housing body relative to the mounting end cap.
CN202123408256.0U 2021-12-30 2021-12-30 Battery capable of preventing thermal diffusion Active CN216563418U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115425360A (en) * 2022-08-19 2022-12-02 东风汽车集团股份有限公司 Explosion-proof electric core module of two-chamber
WO2024036533A1 (en) * 2022-08-17 2024-02-22 宁德时代新能源科技股份有限公司 Battery and electric device
WO2024120552A1 (en) * 2023-05-24 2024-06-13 惠州亿纬锂能股份有限公司 Battery

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024036533A1 (en) * 2022-08-17 2024-02-22 宁德时代新能源科技股份有限公司 Battery and electric device
CN115425360A (en) * 2022-08-19 2022-12-02 东风汽车集团股份有限公司 Explosion-proof electric core module of two-chamber
WO2024120552A1 (en) * 2023-05-24 2024-06-13 惠州亿纬锂能股份有限公司 Battery

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