CN112563620A - Lithium battery energy storage system capable of effectively preventing thermal runaway - Google Patents

Lithium battery energy storage system capable of effectively preventing thermal runaway Download PDF

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Publication number
CN112563620A
CN112563620A CN202110077279.3A CN202110077279A CN112563620A CN 112563620 A CN112563620 A CN 112563620A CN 202110077279 A CN202110077279 A CN 202110077279A CN 112563620 A CN112563620 A CN 112563620A
Authority
CN
China
Prior art keywords
thermal runaway
energy storage
box body
storage system
panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110077279.3A
Other languages
Chinese (zh)
Inventor
王剑
钱明益
李劲超
周宁
范圣杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUZHOU DURAPOWER TECHNOLOGY CO LTD
Original Assignee
SUZHOU DURAPOWER TECHNOLOGY CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SUZHOU DURAPOWER TECHNOLOGY CO LTD filed Critical SUZHOU DURAPOWER TECHNOLOGY CO LTD
Priority to CN202110077279.3A priority Critical patent/CN112563620A/en
Publication of CN112563620A publication Critical patent/CN112563620A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C3/00Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/617Types of temperature control for achieving uniformity or desired distribution of temperature
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/62Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/627Stationary installations, e.g. power plant buffering or backup power supplies
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/656Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6569Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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

Abstract

The invention relates to a lithium battery energy storage system capable of effectively preventing thermal runaway, which comprises a box body and a panel covered on one side, wherein an accommodating space is arranged in the box body, a battery module is arranged in the accommodating space, the accommodating space is surrounded by the panel to form a closed space, the box body at least comprises two layers of protective shells, a fire extinguishing medicament is placed in the protective shells, the boiling temperature of the fire extinguishing medicament is far lower than the thermal runaway temperature of the battery module, free radicals generated by thermal decomposition of the fire extinguishing medicament react with active free radicals in combustion to interrupt the chain reaction of the combustion, a battery management system and a positive pole and a negative pole are also arranged on the panel, and the battery management system and the positive pole and the negative pole are electrically connected; the fire extinguishing agent in the protective shell has low vaporization temperature, ensures the temperature equalization in the box body, and absorbs the heat of the thermal runaway battery through vaporization for the first time. The heat transfer is reduced, the safety of the battery system is ensured, and meanwhile, limited oxygen in the closed space is consumed. In addition, the energy storage system has few components and good safety performance.

Description

Lithium battery energy storage system capable of effectively preventing thermal runaway
Technical Field
The invention relates to a lithium battery energy storage system, in particular to a lithium battery energy storage system capable of effectively preventing thermal runaway.
Background
Present container formula's lithium cell energy storage adopts air-cooled battery thermal management system mostly, and the diaphragm of lithium cell is receiving when a certain amount of heat, often contracts, and then leads to the battery thermal runaway, reacts with the oxygen in the air in the box, forms conflagration on a large scale, and current centralized formula ware of putting out a fire lacks effective intervention means to early thermal runaway. Fail to provide a first time safety precaution. When confirming the conflagration through the temperature sensing, when the smoke is felt, often take place the large tracts of land and stretch, join in marriage traditional conflagration release technique again, the fire extinguishing agent can't arrive near the electric core of thermal runaway near the very first time and realize putting out a fire, and the biggest problem of lithium cell thermal runaway is because it can continuously produce the heat, very easily arouse the after combustion, traditional release technique will put out a fire and evenly release in whole space, along with the fire extinguishing agent receives the effect of gravity and down sinks, it is difficult to keep higher suppression concentration in longer a period of time near the thermal runaway battery, can not fully utilize accurately limited fire extinguishing agent resource.
Disclosure of Invention
The invention aims to provide a lithium battery energy storage system capable of effectively preventing thermal runaway, and solves the problem that the existing thermal management system of a container type lithium battery cannot prevent and treat early thermal runaway.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a lithium battery energy storage system capable of effectively preventing thermal runaway, which comprises a box body, wherein an accommodating space is arranged in the box body, a battery module is arranged in the accommodating space, a panel is covered on one side of the box body and surrounds the accommodating space into a closed space, a fire extinguishing agent is arranged in the box body, the boiling point temperature of the fire extinguishing agent is far lower than the thermal runaway temperature of the battery module, the vaporization of the fire extinguishing agent is to absorb certain heat, a chain reaction of free radicals generated by the thermal decomposition of the fire extinguishing agent and active free radicals in combustion can interrupt the combustion, a Battery Management System (BMS) and positive and negative poles are also arranged on the panel, and the Battery Management System (BMS) and the positive and negative poles are electrically connected with the battery module.
Preferably, the volume of the fire extinguishing agent is greater than 10% of the volume of the accommodating space after the battery module is removed.
Preferably, the liquid filling device further comprises a liquid filling port and a liquid level meter, wherein the liquid filling port and the liquid level meter are located on the periphery of the panel or the box body.
Preferably, the battery module is fixed with the box body through a limiting block, and an elastic buffering material is further arranged between the limiting block and the battery module.
Preferably, the box is preferably an aluminum profile box or a cast aluminum box.
Preferably, a sealing ring is further arranged between the box body and the panel; the sealing ring is arranged at the opening of the box body.
Preferably, the sealing ring is made of ethylene propylene diene monomer, and the contact surface of the sealing ring and the panel is wavy.
Preferably, an elastic buffer is arranged between the battery module and the bottom of the box body.
Preferably, the case includes at least two protective cases, and the fire extinguishing agent is installed between the protective cases.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the invention discloses a lithium battery energy storage system capable of effectively preventing thermal runaway, which comprises a box body and a panel arranged on one side of the box body in a covering mode, wherein an accommodating space is formed in the box body, a battery module is arranged in the accommodating space, the accommodating space is covered by the panel to form a closed space, a fire extinguishing agent is also arranged in the box body, the boiling point temperature of the fire extinguishing agent is far lower than the thermal runaway temperature of the battery module, the boiling point of the general fire extinguishing agent is 40-50 ℃, certain heat is absorbed when the fire extinguishing agent volatilizes, and in addition, the chain reaction of combustion can be interrupted by the reaction of free radicals generated by thermal decomposition of the fire extinguishing agent and active free radicals in combustion, namely, oxygen. The panel is also provided with a Battery Management System (BMS), a positive pole and a negative pole, the Battery Management System (BMS), the positive pole and the negative pole are electrically connected with the battery module, the Battery Management System (BMS) can control the battery core in the module to a certain degree, and the positive pole and the negative pole can be used for charging and discharging the battery; the fire extinguishing agent has low vaporization temperature, forms a heat pipe effect, ensures the temperature equalizing performance in the box body, and absorbs the heat of the thermal runaway battery through vaporization at the first time. The heat transfer is reduced, the safety of the battery system is ensured, and meanwhile, limited oxygen in the closed space is consumed. In addition, the energy storage system has the advantages of few components, low cost and good safety performance.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another view angle according to an embodiment of the present invention.
Wherein the reference numerals are as follows:
1. a box body; 2. a battery module; 3. a panel; 4. a limiting block; 5. an elastic buffer member; 6. a seal ring; 7. a positive pole column, 8 and a negative pole column; 9. a liquid level meter; 10 liquid injection port; 11. a communication jack; 12. Heat dissipation fins; 13. a cushioning elastomeric material.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, the embodiment of the invention comprises a box body 1, a panel 3 is covered on one side of the box body 1, and the panel 3 and the box body 1 are connected through screws and can be disassembled and assembled. Be provided with accommodation space in the box 1, panel 3's lid is established so that accommodation space becomes airtight space, be provided with battery module 2 in the accommodation space, battery module 2 comprises a plurality of electric cores, battery module 2 is fixed through stopper 4 and box 1, stopper 4 sets up the one side that is close to panel 3 at battery module 2, be provided with a plurality of screws on stopper 4, the screw connection is on box 1, prescribe battery module 2, still be provided with the elastic buffer material between stopper 4 and the battery module 2, in order to prevent stopper scratch battery module 2, cause the damage. The battery module 2 is far away from one side of the panel 3, an elastic buffer piece 5 is also arranged between the box body 1 and the battery module 2, and the battery module 2 can be prevented from being scratched by the box body 1, so that certain buffering can be realized during collision. The outer protection shell of the box body 1 is preferably an aluminum box body or a cast aluminum box body, and the aluminum box body has good heat dissipation performance.
The protection casing of box 1 is including two-layer at least, and the medicament dress of putting out a fire is between two-layer protection casing, and the medicament of putting out a fire has carried out the encirclement with airtight space, and the area greatly increased of laying of the medicament of putting out a fire, the opening part of protection casing still are provided with sealing washer 6, and the setting of sealing washer 6 covers the protection casing, covers again and establishes top panel 3 and will protect the casing and seal. The leakage of the fire extinguishing agent and the entrance of external oxygen are prevented, and the outward volatilization of the gas generated by the fire extinguishing agent is also prevented. The sealing ring 6 is made of ethylene propylene diene monomer material, and the ethylene propylene diene monomer material has the characteristics of strong oxidation resistance, ozone resistance and corrosion resistance. Meanwhile, the contact surface of the sealing ring 6 and the panel 3 is wavy, and the wavy structure enables the sealing performance to be more excellent.
The panel 3 is also provided with a liquid injection port 10, the liquid injection port 10 is positioned on the panel 3, when the panel 3 is covered on the box body 1, the injection of fire extinguishing agents is convenient, the boiling point of the fire extinguishing agents is low, the fire extinguishing agents are easy to vaporize, on one hand, the fire extinguishing agents can absorb certain heat during vaporization, on the other hand, free radicals generated by thermal decomposition can react with active free radicals in combustion to interrupt the chain reaction of combustion, namely, oxygen in a closed space is absorbed, the combustion conditions are usually two, and the fire extinguishing agents have proper temperature and a certain amount of oxygen. The volume content of the fire extinguishing agent in one box body is more than 10% of the volume of the accommodating space after the battery module 2 is removed. Too little content of the fire extinguishing agent absorbs less heat and cannot meet the demand. The fire extinguishing agent comprises one or more of heptafluoropropane and hexafluoropropane. Heptafluoropropane and hexafluoropropane are both good chemical extinguishing agents, and the rapid reaction and excellent combustion inhibition of heptafluoropropane and hexafluoropropane can avoid the occurrence of catastrophic fires. In addition, the heptafluoropropane and the hexafluoropropane do not contain particles or greasy residues after release, are completely vaporized in the atmosphere without leaving residues, are non-conductive and cannot damage devices when extinguishing fire.
The panel 3 is also provided with a liquid level meter 9 for detecting the amount of fire extinguishing agent in the protective casing, so that the fire extinguishing agent can be observed and injected timely to avoid fire. Still be provided with Battery Management System (BMS), anodal post 7 and negative pole post 8 on the panel 3, battery management system (BMS)'s communication jack 11 still is located the outer terminal surface of panel 3, and Battery Management System (BMS) is used for carrying out a series of management to the battery, and anodal post 7 and negative pole post 8 are used for the charge-discharge of battery module 2. The panel 3 is further provided with a heat dissipation fin 12 for dissipating heat in the box body 1.
During the specific use, after the whole assembly was accomplished, container formula lithium cell normally worked, when battery module 2 began to take place the thermal runaway, the agent that puts out a fire in the protective housing heat absorption vaporization takes place the heat pipe reaction, with the temperature reduction in the box 1, when the heat rose to the uniform temperature, the agent that puts out a fire will consume limited oxygen in the airtight space, prevents that the thermal runaway from arousing naked light. The content of the added fire extinguishing agent can be checked regularly according to the requirement. Adding in time.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims (10)

1. The utility model provides a can effectively prevent lithium cell energy storage system of thermal runaway which characterized in that, includes the box, be provided with accommodation space in the box, be provided with battery module in the accommodation space, a side lid of box is equipped with the panel, the panel will accommodation space encloses into airtight space, the agent of putting out a fire has been installed to the box, the boiling temperature of the agent of putting out a fire is far less than battery module thermal runaway's temperature, absorb certain heat when the agent of putting out a fire vaporizes, the chain reaction of the active free radical reaction interruptible burning in the free radical that the agent of putting out a fire thermal decomposition produced and the burning still is provided with Battery Management System (BMS) and positive and negative utmost point post on the panel, Battery Management System (BMS) and positive and negative utmost point post all with battery module electric connection.
2. The lithium battery energy storage system capable of effectively preventing thermal runaway according to claim 1, wherein: the volume of the fire extinguishing agent is more than 10% of the volume of the accommodating space after the battery module is removed.
3. The lithium battery energy storage system capable of effectively preventing thermal runaway according to claim 1 or 2, wherein: the fire extinguishing agent comprises one or more of heptafluoropropane and hexafluoropropane.
4. The lithium battery energy storage system capable of effectively preventing thermal runaway according to claim 1, wherein: still including annotating liquid mouth and level gauge, annotate the liquid mouth with the level gauge is located the panel or the periphery of box.
5. The lithium battery energy storage system capable of effectively preventing thermal runaway according to claim 1, wherein: the battery module passes through the stopper with the box is fixed, the stopper with still be provided with elastic buffer material between the battery module.
6. The lithium battery energy storage system capable of effectively preventing thermal runaway according to claim 1, wherein: the box body is preferably an aluminum profile box body or a cast aluminum box body.
7. The lithium battery energy storage system capable of effectively preventing thermal runaway according to claim 1, wherein: a sealing ring is also arranged between the box body and the panel; the sealing ring is arranged at the opening of the box body.
8. The lithium battery energy storage system capable of effectively preventing thermal runaway according to claim 7, wherein: the sealing ring is made of ethylene propylene diene monomer, and the contact surface of the sealing ring and the panel is wavy.
9. The lithium battery energy storage system capable of effectively preventing thermal runaway according to claim 1, wherein: and an elastic buffer part is arranged between the battery module and the bottom of the box body.
10. The lithium battery energy storage system capable of effectively preventing thermal runaway according to claim 1, wherein: the box body at least comprises two layers of protection shells, and the fire extinguishing agent is arranged between the protection shells.
CN202110077279.3A 2021-01-20 2021-01-20 Lithium battery energy storage system capable of effectively preventing thermal runaway Pending CN112563620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110077279.3A CN112563620A (en) 2021-01-20 2021-01-20 Lithium battery energy storage system capable of effectively preventing thermal runaway

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110077279.3A CN112563620A (en) 2021-01-20 2021-01-20 Lithium battery energy storage system capable of effectively preventing thermal runaway

Publications (1)

Publication Number Publication Date
CN112563620A true CN112563620A (en) 2021-03-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110077279.3A Pending CN112563620A (en) 2021-01-20 2021-01-20 Lithium battery energy storage system capable of effectively preventing thermal runaway

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113629303A (en) * 2021-10-09 2021-11-09 深圳市腾运发电子有限公司 Wind energy storage standby power management method and system and intelligent terminal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113629303A (en) * 2021-10-09 2021-11-09 深圳市腾运发电子有限公司 Wind energy storage standby power management method and system and intelligent terminal

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