CN111682142A - Battery pack with fire-fighting function and control method thereof - Google Patents
Battery pack with fire-fighting function and control method thereof Download PDFInfo
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- CN111682142A CN111682142A CN202010614967.4A CN202010614967A CN111682142A CN 111682142 A CN111682142 A CN 111682142A CN 202010614967 A CN202010614967 A CN 202010614967A CN 111682142 A CN111682142 A CN 111682142A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 129
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 129
- 239000011521 glass Substances 0.000 claims description 41
- 239000007788 liquid Substances 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 16
- 238000005192 partition Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000000110 cooling liquid Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 5
- 238000009835 boiling Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 208000025962 Crush injury Diseases 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
- A62C37/10—Releasing means, e.g. electrically released
- A62C37/11—Releasing means, e.g. electrically released heat-sensitive
- A62C37/14—Releasing means, e.g. electrically released heat-sensitive with frangible vessels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
A battery pack with fire-fighting function and its control method are disclosed. In an embodiment of this application, battery package with fire control function includes: the battery package body includes: the lithium ion battery pack comprises a lithium ion battery array formed by arranging one or more lithium ion batteries and an upper cover placed above the lithium ion battery array; and the one or more small fire extinguishing devices are arranged inside the upper cover and are opposite to the explosion-proof valves of the one or more lithium ion batteries. The battery pack and the control method thereof in the embodiment of the application can not only reserve sufficient time for taking necessary measures before the battery pack is ignited and exploded, but also ensure the safety of other parts or relevant equipment in the battery pack, reduce the scrapped condition of the equipment and reduce the cost.
Description
Technical Field
The application relates to the technical field of lithium ion batteries, in particular to a battery pack with a fire-fighting and fire-extinguishing function and a control method thereof.
Background
Because the lithium ion battery has the advantages of large specific capacity, long cycle life, light weight, higher performance and the like, the lithium ion battery is extended to the fields of traffic power, energy storage, communication, robots and the like from the digital 3C field, and is more and more widely applied. However, as the performance requirements of the lithium ion battery are higher and higher, the safety factor is more and more prominent. Generally, under abnormal conditions such as overcharge, overdischarge and internal short circuit, thermal runaway of the lithium ion battery is easy to occur, further combustion and even explosion are caused, and casualties or property loss is caused.
In the correlation technique, mainly through dispose fire extinguishing system alone outside battery module or encapsulation package, when taking place fire alarm, fire extinguishing system sprays a large amount of water to the battery package rapidly and puts out a fire or starts the fire extinguisher and put out a fire, and this method reaction is slow, can not put out a fire the cooling to dangerous department the very first time, can lead to inside a large amount of electrical part damages and the lithium cell to scrap to only be applicable to large-scale container energy storage, be not suitable for electric tool and little energy storage application scene.
At present, in electric tools such as electric vehicles and the like, small energy storage application scenes and other similar applications, functions such as timely alarming, risk elimination and the like of a battery pack are realized by relying on a battery management system and the safety design of a lithium ion battery, the method usually alarms to inform people to escape or adopts an external fire extinguishing mode to extinguish fire when a risk occurs, the best fire extinguishing time can be missed, equipment is probably scrapped completely, and unnecessary casualties and property loss are easily caused. Moreover, safety regulations of related application scenes require that after the single battery is out of control due to heat, the battery system does not ignite or explode within 5 minutes, and safe escape time is reserved for passengers, so that the battery pack needs to be cooled in time after the single battery is out of control due to heat, and the occurrence of ignition and explosion is avoided. Therefore, it is desirable to provide a battery pack with a fire extinguishing function and a control method thereof.
Disclosure of Invention
In order to solve the above technical problems, it is desirable to provide a battery pack with a fire-fighting function and a control method thereof, which not only can leave sufficient time for necessary measures to be taken before the battery pack is exploded by fire, but also can ensure the safety of other parts in the battery pack or related equipment, reduce the scrapped condition of the equipment, and reduce the cost.
According to an aspect of the present application, there is provided a battery pack with a fire extinguishing function, including:
the battery package body includes: the lithium ion battery pack comprises a lithium ion battery array formed by arranging one or more lithium ion batteries and an upper cover placed above the lithium ion battery array;
and the one or more small fire extinguishing devices are arranged inside the upper cover and are opposite to the explosion-proof valves of the one or more lithium ion batteries.
In some examples, the battery pack further includes: and the battery management module is configured to monitor the temperature of the one or more lithium ion batteries and control the small fire extinguishing device opposite to the explosion-proof valve of the lithium ion battery to extinguish fire and reduce the temperature of the lithium ion battery aiming at the lithium ion battery with the temperature meeting the preset thermal runaway condition.
In some examples, the small fire extinguishing device is a glass tube with liquid inside.
In some examples, the liquid is a compressed inert liquid gas or a cooling liquid.
In some examples, the glass tube is fixed inside the upper cover by a mounting jig.
In some examples, the mounting fixture has a force application needle, the glass tube has a crush fracture point thereon, and the crush fracture point on the glass tube is opposite the force application needle on the mounting fixture.
In some examples, the force application pins of the mounting clip are controlled by the battery management module.
In some examples, the battery pack with a fire-fighting function further includes: an electrical accessory; the battery management module is further configured to control the electrical accessory to send out an alarm signal when the temperature of any one or more lithium ion batteries is detected to meet a preset thermal runaway condition.
In some examples, the battery pack body further includes:
a lower box body;
the bottom clapboard is placed in the lower box body;
a battery connecting sheet;
a top baffle having one or more slots;
the one or more lithium ion batteries are arranged in the bottom separator at intervals, and the lithium ion batteries are electrically connected through battery connecting sheets, so that the lithium ion battery array is formed; the top separator is arranged above the lithium ion battery array and used for spacing and fixing the one or more lithium ion batteries, and the positive and negative poles and the explosion-proof valve of each lithium ion battery penetrate through the slotted holes in the top separator and are exposed out of the top plate separator; the upper cover is arranged on the top partition plate and is fixedly connected and sealed with the lower box body.
According to an aspect of the present application, there is provided a control method of a battery pack, the battery pack being the above battery pack with a fire-fighting function, the control method including:
monitoring a temperature of the one or more lithium ion batteries;
and aiming at the lithium ion battery with the temperature meeting the preset thermal runaway condition, controlling a small fire extinguishing device opposite to an explosion-proof valve of the lithium ion battery to extinguish fire and reduce the temperature of the lithium ion battery.
In some examples, the small fire extinguishing device is a glass tube filled with liquid inside, and the glass tube is fixed inside an upper cover of the battery pack through a mounting clamp; to the lithium ion battery that the temperature satisfies preset thermal runaway condition, control rather than the small-size extinguishing device that explosion-proof valve is relative right lithium ion battery puts out a fire the cooling, include: and aiming at the lithium ion battery with the temperature meeting the preset thermal runaway condition, controlling a force application needle of a mounting fixture of the glass tube opposite to an explosion-proof valve of the lithium ion battery to extrude a fracture point on the glass tube so as to crack the glass tube, releasing the liquid, and converting the liquid into gas to cool and isolate oxygen so as to complete the fire extinguishing and cooling of the lithium ion battery.
In the embodiment of the application, the fire-fighting device is installed inside the lithium ion battery pack, the response speed is high, the lithium ion battery with thermal runaway or ignition risk can be put out a fire in the first time, the thermal runaway or ignition risk is prevented from spreading to other lithium ion batteries in the module or the packaging pack, sufficient time can be reserved before the battery pack is exploded due to fire so as to take necessary measures, the safety of other parts or related equipment in the battery pack can be guaranteed, the scrapped condition of the equipment is reduced, and the cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a battery pack with a fire-fighting function according to an embodiment of the present application.
Fig. 2 is a schematic layout of a small fire extinguishing apparatus according to a preferred embodiment of the present application.
Fig. 3 is a flowchart of a control method of a battery pack with a fire extinguishing function in an embodiment of the present application.
Description of reference numerals:
10. the battery pack has a fire-fighting function; 11. a lower box body; 12. a bottom partition; 13. a temperature sensor; 14. a battery management module; 15. a lithium ion battery; 16. connecting the battery cell; 17. a top partition; 18. an upper cover; 19. a small fire extinguishing device; 20. a glass tube; 21. and (5) installing a clamp.
Detailed Description
Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that, in the present application, the embodiments and the features thereof may be arbitrarily combined with each other without conflict.
Fig. 1 shows an exemplary structure of a battery pack with a fire extinguishing function provided by an embodiment of the present application. As shown in fig. 1, the battery pack 10 with a fire-fighting function may include a battery pack body, one or more small fire-fighting devices 19. Wherein, can include in the battery package body: a lithium ion battery array formed by arranging one or more lithium ion batteries 15, and an upper cover 18 placed over the lithium ion battery array. One or more small fire extinguishing devices 19 are arranged in the upper cover 18 and are opposite to the explosion-proof valves of one or more lithium ion batteries 15, and by adopting the arrangement mode, under the condition that certain or some lithium ion batteries 15 are in thermal runaway or have fire risks, the gas flushed out by the explosion-proof valves can open the small fire extinguishing devices 19 above the lithium ion batteries 15 through the self impulsive force, so that the lithium ion batteries with thermal runaway or fire risks can be extinguished in the first time, the thermal runaway or fire risks are prevented from spreading to other lithium ion batteries in a module or an encapsulation package, sufficient time can be left before the battery package is subjected to fire explosion so as to take necessary measures, the safety of other parts in the battery package or related equipment thereof can be guaranteed, the condition of equipment scrapping is reduced, and the cost is reduced.
In some examples, as shown in fig. 1, the battery pack body may further include: the battery comprises a lower box body 11, a bottom clapboard 12, a battery cell connecting sheet 16 and a top clapboard 17.
The lower box body 11 is of a hollow structure, the bottom partition plate 12 is arranged in the lower box body 11, one or more lithium ion batteries 15 are arranged in the bottom partition plate 12 and spaced apart from each other, and the lithium ion batteries 15 are electrically connected through battery connecting sheets 16, so that a lithium ion battery array is formed.
The top partition board 17 is provided with one or more slotted holes, the top partition board 17 is arranged above the lithium ion battery array and used for spacing and fixing one or more lithium ion batteries 15, the positive and negative poles and the explosion-proof valve of each lithium ion battery 15 penetrate through the corresponding slotted hole on the top partition board 17 and are exposed out of the top partition board 17, and the upper cover 18 is arranged on the top partition board 17 and fixedly connected and sealed with the lower box body 11.
In some examples, the structure and slot design of the top separator 17 are matched with the size of the lithium ion battery 15, so that the positive and negative poles of the lithium ion battery 15 and the explosion-proof valve are completely exposed, and the connection between the lithium ion batteries 15, the connection between the battery module and the outside, and the safe maintenance of the battery pack 10 through the explosion-proof valve are realized.
In at least some embodiments, the battery pack 10 may further include: a battery management module 14. The battery management module 14 may be configured to monitor the temperature of one or more lithium ion batteries 15, and control the small fire extinguishing device 19 opposite to the explosion-proof valve thereof to extinguish fire and reduce temperature of the lithium ion batteries 15 for the lithium ion batteries 15 whose temperature meets a preset thermal runaway condition.
As shown in fig. 1, in some embodiments, the battery management module 14 may be fixed to an outer side of the lower case 11, not only to facilitate connection of the battery pack 10 to an external device, but also to facilitate removal and reassembly of the battery management module 14. The battery management module 14 may be implemented by a computer such as a probe or a microcomputer. In addition, the battery pack 10 may further include one or more temperature sensors 13 connected to the battery management module 14, where the one or more temperature sensors 13 may be configured to detect the temperature of the associated lithium ion battery 15 in real time and report the detected temperature to the battery management module 14. In practical application, a temperature sensor 13 may be disposed on the heat dissipation plate of each lithium ion battery 15, so that the temperature of each lithium ion battery 15 can be monitored in real time.
In some embodiments, the battery pack 10 may further include an electrical accessory (not shown) that may be configured to issue an alarm signal under the control of the battery management module 14. Specifically, the battery management module 14 may be further configured to control the electrical accessories to send out an alarm signal when detecting that the temperature of any one or more lithium ion batteries 15 meets a preset thermal runaway condition, so as to notify an external device or an operator of an abnormality of the lithium ion batteries inside the battery pack 10, thereby taking external fire-fighting measures in time, and ensuring the safety of the device to which the battery pack 10 belongs, the surrounding environment and the safety of related personnel.
In practice, the electrical accessory may include, but is not limited to, an alarm, a signal transmission module that transmits alarm information to a designated external device, and the like. The electrical accessory may be partially mounted on an outer side of the lower case 11 of the battery pack 10, partially disposed inside the battery pack 10 (e.g., inside the lower case 11 or inside the upper cover 18).
In at least some embodiments, the small fire suppression device 19 may be a glass tube 20 with a liquid inside, and the liquid inside the glass tube 20 may be, but is not limited to, a compressed inert liquid gas or a low boiling point coolant. The glass tube 20 may be a specially made glass tube that bursts when subjected to high temperatures or when subjected to certain external impacts. Like this, small-size extinguishing device 19 is in the top of lithium ion battery 15 explosion vent, when lithium ion battery 15 has gas to rush out because of thermal runaway, can cause glass tube 20 to break, and liquid will release in the twinkling of an eye, and liquid turns into gas immediately, and cooling and isolated oxygen to realize the cooling of putting out a fire of small-size extinguishing device 19 below lithium ion battery 15.
Figure 2 shows an exemplary layout of one or more small fire suppression devices 19 within the upper cover 18 in an embodiment of the present application. As shown in fig. 2, the main body of the small fire extinguishing device 19 is a glass tube 20 (e.g., a tailored glass tube), the glass tube 20 is fixed inside the upper cover 18 by a mounting fixture 21, the glass tube will burst when encountering high temperature or will burst when encountering large external force impact, the compressed liquid in the glass tube will be released instantly, the liquid will be transformed into gas immediately, and the gas is cooled and isolated to extinguish fire and cool the lithium ion battery below.
In some examples, the installation jig 21 may have a force application needle (not shown), the glass tube 20 is provided with a press breaking point, and the press breaking point on the glass tube 20 is opposite to the force application needle on the installation jig 21. In this way, the glass tube 20 can be broken by actively controlling the force application needle, so as to realize the fire extinguishing and temperature reduction of the corresponding lithium ion battery 15. In this example, the force application pins of the mounting jig may be controlled by the battery management module 14, and a specific control method may refer to a control method described below. Specifically, when the battery management module 14 detects that some or some lithium ion batteries 15 are out of control thermally or have a safety risk such as fire, the force application needle of the control installation fixture 21 extrudes the extrusion breaking point of the glass tube 20 to break the glass tube 20, so that the compressed liquid in the glass tube 20 is released instantly, the liquid is immediately converted into gas, and the gas is cooled and isolated from oxygen to extinguish and cool the corresponding lithium ion batteries.
As can be seen from the above, in the battery pack 10 according to the embodiment of the present application, each small fire extinguishing device 19 is mechanically opened, so that not only can the fire extinguishing and cooling function of the small fire extinguishing device 19 be opened under the impact of the gas rushed out of the explosion-proof valve when the lithium ion battery 15 is out of thermal control, but also the fire extinguishing and cooling function of the small fire extinguishing device 19 can be opened by, for example, the battery management module 14 or the like through the force application needle, so that the occurrence of control failure when there is a fire risk can be effectively avoided, and the operation is safer and.
The above-mentioned battery package that has fire control function of putting out a fire of this application embodiment, fire control extinguishing device installs inside lithium ion battery package, response speed is fast, can put out a fire to the lithium ion battery package of thermal runaway or have the risk of catching fire the very first time, other lithium ion batteries of prevention in to module or encapsulation package stretch, not only can leave sufficient time so that take necessary measures before the battery package explodes on fire, and can ensure the safety of other parts or its relevant equipment in the battery package, reduce the condemned condition of equipment, and the cost is reduced. The battery pack can be suitable for power tools and small energy storage application scenes or other similar application scenes.
An exemplary assembly process of the battery pack 10 will be described in detail below.
For example, for a square aluminum-can battery pack, the fire extinguishing cooling liquid used is a low boiling point fluorinated liquid, and the assembly process may include:
first, the lower case 11 of the battery pack is a hollow structure, and the bottom separator 12 is put therein, and the lithium ion batteries 15 are arranged in the bottom separator 12 to be spaced apart. After the lithium ion batteries 15 are arranged, the top partition plate 17 is covered, the top partition plate 17 plays a role in spacing and fixing the lithium ion batteries 15, and the positive and negative poles and the explosion-proof valve of each lithium ion battery 15 are completely exposed through the slotted hole in the top partition plate 17. Then, the lithium ion batteries 15 are connected in series or in parallel through the battery connecting tab 16 to be combined.
Alternatively, the lithium ion batteries 15 may be combined in series or in parallel through the battery connecting pieces 16 to form a module, and then the module may be placed in the lower case 11 and then the module may be combined in series or in parallel through the battery connecting pieces 16. Then, the top separator 17 is covered, and the top separator 17 plays a role of spacing and fixing the lithium ion batteries 15, and the positive and negative poles and the explosion-proof valve of each lithium ion battery 15 are completely exposed through the slot holes on the top separator 17. Then, the lithium ion batteries 15 are connected in series or in parallel through the battery connecting tab 16 to be combined.
After the arrangement, fixation and connection of the lithium ion battery 15 in the lower box 11 are completed, the corresponding collecting harness and electrical devices, including but not limited to the above battery management module 14, the temperature sensor 13, the electrical accessories and the harness required for electrical connection thereof, are installed.
A plurality of small fire extinguishing devices are installed inside the upper cover 18 and facing the explosion-proof valve of the lithium ion battery 15. Liquid in the small-size extinguishing device is the liquid gas of compression inertia or the low boiling coolant liquid, and small-size extinguishing device can cause the glass pipe in time to take place to break when battery thermal runaway gas rushes out in the top of explosion-proof valve, puts out a fire the cooling.
After the arrangement in the battery pack is completed, the upper cover 18 is covered, the upper cover 18 and the lower case 11 are fixed by bolts and sealed by sealant, and thus, the assembly of the battery pack is completed.
Fig. 3 shows an exemplary control method of the battery pack 10 in the embodiment of the present application. As shown in fig. 3, the exemplary control method may include the steps of:
step S301, monitoring the temperature of one or more lithium ion batteries;
in practical application, the temperature sensor disposed on each lithium ion battery 15 may detect the temperature of the lithium ion battery 15 in real time and report the detected temperature to the battery management module 14.
And step S302, aiming at the lithium ion battery with the temperature meeting the preset thermal runaway condition, controlling a small fire extinguishing device opposite to an explosion-proof valve of the lithium ion battery to extinguish fire and reduce the temperature of the lithium ion battery.
As described above, the small fire extinguishing apparatus in the battery pack 10 may be a glass tube with liquid filled therein, and the glass tube is fixed inside the upper cover of the battery pack by a mounting jig. In step S302, for a lithium ion battery whose temperature satisfies a predetermined thermal runaway condition, a force application needle of a mounting fixture of a glass tube opposite to an explosion-proof valve of the lithium ion battery is controlled to press a pressing fracture point on the glass tube, so as to crack the glass tube, release liquid, and convert the liquid into gas to cool and isolate oxygen, thereby completing the fire extinguishing and cooling of the lithium ion battery.
In some examples, the thermal runaway condition may be preconfigured. For example, the thermal runaway condition may be a thermal runaway model that is pre-constructed and configured in the battery management module 14. The thermal runaway module may be constructed from characteristics, parameters, and operational history of the individual lithium ion batteries 15 in the battery pack 10. In practical applications, the thermal runaway conditions of different lithium ion batteries 15 in the battery pack 10 may be different. For example, the thermal runaway model for all lithium ion batteries 15 in the battery pack 10 may be the same, but the corresponding parameters of each lithium ion battery 15 in the thermal runaway model may be different. Specifically, any thermal runaway model applicable to the embodiment of the present application in the related art can be applied to the embodiment of the present application, and the embodiment of the present application is not limited to which thermal runaway model is specifically adopted and the specific construction method of the thermal runaway model.
In some embodiments, after step S301, for example after, before, or simultaneously with step S302, the method may further include: when the battery management module 14 determines that the temperature of any one or more lithium ion batteries meets the preset thermal runaway condition, the battery management module controls the electrical accessories to send out an alarm signal, so that external measures can be taken in time through external equipment and related personnel to perform fire fighting treatment.
Through the control method of the embodiment of the application, through the intelligent control of the small-sized fire extinguishing device in the battery pack, the response speed block is realized, the fire extinguishing and cooling treatment can be performed on the lithium ion batteries which are out of thermal control or have the risk of catching fire in the first time, the spread of the out of thermal control or the risk of catching fire to other lithium ion batteries in the battery pack is prevented, sufficient time can be reserved before the battery pack is subjected to fire explosion so as to take necessary measures, the safety of part of the lithium ion batteries which are not out of thermal control in the battery pack or related equipment applied to the battery pack can be guaranteed, the condition of equipment scrapping is reduced, and the cost is reduced.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A battery pack with a fire-fighting function comprises:
the battery package body includes: the lithium ion battery pack comprises a lithium ion battery array formed by arranging one or more lithium ion batteries and an upper cover placed above the lithium ion battery array;
and the one or more small fire extinguishing devices are arranged inside the upper cover and are opposite to the explosion-proof valves of the one or more lithium ion batteries.
2. The battery pack according to claim 1, further comprising: and the battery management module is configured to monitor the temperature of the one or more lithium ion batteries and control the small fire extinguishing device opposite to the explosion-proof valve of the lithium ion battery to extinguish fire and reduce the temperature of the lithium ion battery aiming at the lithium ion battery with the temperature meeting the preset thermal runaway condition.
3. A battery pack according to claim 1 or 2, wherein the small fire extinguishing means is a glass tube filled with a liquid, which is a compressed inert liquid gas or a cooling liquid.
4. The battery pack according to claim 3, wherein the glass tube is fixed inside the upper cover by a mounting jig.
5. The battery pack according to claim 4, wherein the mounting jig has a force application needle, the glass tube is provided with a press breaking point, and the press breaking point on the glass tube is opposite to the force application needle on the mounting jig.
6. The battery pack of claim 5, wherein the force application pins of the mounting clip are controlled by the battery management module.
7. The battery pack according to claim 1, further comprising: an electrical accessory; the battery management module is further configured to control the electrical accessory to send out an alarm signal when the temperature of any one or more lithium ion batteries is detected to meet a preset thermal runaway condition.
8. The battery pack according to claim 1, wherein the battery pack body further comprises:
a lower box body;
the bottom clapboard is placed in the lower box body;
a battery connecting sheet;
a top baffle having one or more slots;
the one or more lithium ion batteries are arranged in the bottom separator at intervals, and the lithium ion batteries are electrically connected through battery connecting sheets, so that the lithium ion battery array is formed; the top separator is arranged above the lithium ion battery array and used for spacing and fixing the one or more lithium ion batteries, and the positive and negative poles and the explosion-proof valve of each lithium ion battery penetrate through the slotted holes in the top separator and are exposed out of the top plate separator; the upper cover is arranged on the top partition plate and is fixedly connected and sealed with the lower box body.
9. A control method of a battery pack with a fire-fighting function according to claim 2, comprising:
monitoring a temperature of the one or more lithium ion batteries;
and aiming at the lithium ion battery with the temperature meeting the preset thermal runaway condition, controlling a small fire extinguishing device opposite to an explosion-proof valve of the lithium ion battery to extinguish fire and reduce the temperature of the lithium ion battery.
10. The control method according to claim 9, wherein,
the small fire extinguishing device is a glass tube filled with liquid inside, and the glass tube is fixed inside the upper cover of the battery pack through a mounting clamp;
to the lithium ion battery that the temperature satisfies preset thermal runaway condition, control rather than the small-size extinguishing device that explosion-proof valve is relative right lithium ion battery puts out a fire the cooling, include: and aiming at the lithium ion battery with the temperature meeting the preset thermal runaway condition, controlling a force application needle of a mounting fixture of the glass tube opposite to an explosion-proof valve of the lithium ion battery to extrude a fracture point on the glass tube so as to crack the glass tube, releasing the liquid, and converting the liquid into gas to cool and isolate oxygen so as to complete the fire extinguishing and cooling of the lithium ion battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010614967.4A CN111682142A (en) | 2020-06-30 | 2020-06-30 | Battery pack with fire-fighting function and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010614967.4A CN111682142A (en) | 2020-06-30 | 2020-06-30 | Battery pack with fire-fighting function and control method thereof |
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| CN111682142A true CN111682142A (en) | 2020-09-18 |
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| CN202010614967.4A Pending CN111682142A (en) | 2020-06-30 | 2020-06-30 | Battery pack with fire-fighting function and control method thereof |
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Address after: Room 8050, 8 / F, 1033 Changning Road, Changning District, Shanghai 200050 Applicant after: Aopu (Shanghai) new energy Co.,Ltd. Address before: Room 501, No. 358 Ledu Road, Songjiang District, Shanghai, 201103 Applicant before: SHANGHAI YUYUAN POWER TECHNOLOGY Co.,Ltd. |
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Application publication date: 20200918 |