CN109119571B - Battery system and application method thereof - Google Patents
Battery system and application method thereof Download PDFInfo
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- CN109119571B CN109119571B CN201810840375.7A CN201810840375A CN109119571B CN 109119571 B CN109119571 B CN 109119571B CN 201810840375 A CN201810840375 A CN 201810840375A CN 109119571 B CN109119571 B CN 109119571B
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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
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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
- H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to a battery system including a case, a separator having a plurality of vent holes and a plurality of sealing bodies, and a plurality of battery cells having safety valves. The housing encloses a receiving space. The partition plate is arranged in the shell and divides the accommodating space into a battery area and an isolation area. The plurality of vent holes are formed in the surface of the partition plate. Each of the sealing bodies closes one of the vent holes. The plurality of battery cells are arranged in the battery area, and each battery cell is arranged opposite to one vent hole. The safety valve is arranged on the surface of the battery monomer and is opposite to the vent hole. When the battery monomer is out of control thermally, the sealing body is flushed away, and the eruption enters the isolation region. The baffle can make the free eruption of battery separate with other battery monomer that do not run away completely isolated, reduces the possibility of thermal runaway propagation, has improved battery module's security greatly, has reduced the potential safety hazard.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery system and an application method thereof.
Background
In recent years, the market share of electric vehicles has steadily increased. The lithium ion battery has the excellent performances of high voltage, high specific energy, long cycle life, no pollution to the environment and the likeThere is a high level of interest to the electric vehicle industry and certain applications are being achieved. However, thermal runaway of lithium ion batteries can cause the electrolyte to evaporate forming electrolyte vapor and produce a combustible gas mixture, such as H2、CO、CH4Etc., and accumulated inside the battery. After the interior of the battery reaches a certain pressure limit, the safety valve is opened, and the combustible mixed gas is released to the external environment along with the burst of the battery. In the process of battery eruption, the highest surface temperature of the battery can reach about 1000 ℃, the internal temperature of the battery core is higher and is usually accompanied with sparks, and the surface temperature of the battery is about 600-1200 ℃. Since the high temperature surface of the battery and the temperature of the spark are much higher than the ignition temperature of the gaseous propellant, once the propellant is injected into the air and contacts oxygen, the ignition phenomenon is very likely to occur and a fire is initiated. After the battery is sprayed, the high-temperature combustible substance is easy to spontaneously combust after contacting with the air entering the battery. In addition, even if the gaseous emissions after the battery bursts do not catch fire, if they accumulate to a certain amount, they may explode and become more harmful. Therefore, battery bursting is one of the safety hazards of causing lithium ion battery fire and even explosion accidents. Fire and explosion accidents caused by thermal runaway of the lithium ion battery are frequently reported, and the safety problem becomes one of the main factors for preventing the large-scale commercial application of the lithium ion battery in the power supply industry.
The main concern in the prior art is the design of a hard-shell battery safety valve, namely that the battery safety valve has a certain opening pressure. When the gas pressure in the battery reaches a certain value, the safety valve is opened to release the gas in the battery to the external environment, so that the explosion phenomenon of the battery is avoided. However, when the hard shell lithium battery is in thermal runaway, substances sprayed from the safety valve can harm other normal monomers, and the traditional battery system is difficult to prevent and control the thermal runaway harm of a fault monomer.
Disclosure of Invention
Therefore, it is necessary to provide a battery system and an application method thereof to solve the problem that the conventional battery system is difficult to control the thermal runaway hazard of the failed cell.
A battery system, the battery system comprising:
a housing enclosing a receiving space;
a partition plate disposed in the case and dividing the accommodation space into a battery region and an isolation region;
the plurality of vent holes are formed in the surface of the partition plate;
a plurality of seals, each said seal enclosing one said vent;
the battery units are arranged in the battery area, and each battery unit is opposite to one vent hole;
and the safety valve is arranged on the surface of the battery monomer and is opposite to the vent hole.
In one embodiment, the baffle comprises an insulating layer made of an insulating material.
In one embodiment, the separator comprises an anticorrosive layer which is arranged on one side of the separator close to the isolation area and is made of anticorrosive materials.
In one embodiment, the corrosion protection layer is a corrosion-resistant metal layer.
In one embodiment, the sealing body is a sealing cover covering one end of the vent hole far away from the battery cell.
In one embodiment, the vent hole is a conical hole, and the diameter of the opening of the conical hole close to the isolation region is larger than that of the opening close to the battery region.
In one embodiment, the battery system includes:
the inductor is arranged on the inner wall of the shell and arranged in the isolation area, and the inductor is used for inducing the single battery eruption;
the controller is connected with the inductor;
and the diluting device is connected with the controller and stores diluting gas.
In one embodiment, the inductor comprises:
the light source is arranged opposite to the light receiver, light of the light source is received by the light receiver opposite to the light source correspondingly, the vent holes are arranged on the surface array of the partition board, and at least one light ray emitted by the light source is arranged at the opening of each row of vent holes and each column of vent holes.
In one embodiment, the light source is monochromatic light.
A fire suppression method for battery thermal runaway includes the following steps:
s10, sensing the environment change of the isolation area and transmitting the environment change information;
and S20, acquiring the environment change information, judging whether the battery thermal runaway occurs or not according to the environment change information, controlling the diluting device to release the diluting gas if the battery thermal runaway is judged to occur, and not acting if the battery thermal runaway is not judged to occur.
A method for identifying a thermal runaway battery cell comprises the following steps:
s100, receiving light intensity change and transmitting the light intensity change information;
s200, obtaining the light intensity change information, and calculating the position of the light intensity change area, namely the position of the thermal runaway battery monomer according to the position of the light receiver transmitting the light intensity change information.
In one embodiment, the step S200 includes a step S210 of presetting a light intensity threshold, and when the obtained light intensity change reaches the light intensity threshold, determining that the battery thermal runaway occurs.
The battery management system comprises a shell, a partition plate with a vent hole and a sealing body and a single battery arranged in a battery area partitioned by the partition plate, wherein a safety valve of the single battery is aligned with the vent hole. When the battery monomer is out of control due to heat, the sealing body is opened, and eruptions generated by the out of control due to heat enter the isolation area separated by the partition plate. The baffle can make the free eruption thing of thermal runaway battery is isolated with other battery monomer that do not run away, avoids causing thermal runaway's chain reaction, has improved the security of battery module greatly, has reduced the potential safety hazard.
Drawings
Fig. 1 is a cross-sectional view of a battery system according to an embodiment of the present invention;
fig. 2 is a top view of a battery system according to an embodiment of the invention;
fig. 3 is a structural connection diagram of a fire suppression system of a battery system according to an embodiment of the present invention.
The reference numbers illustrate:
10 battery system
100 outer casing
110 accommodating space
112 cell region
114 isolation region
200 baffle
210 vent hole
220 sealing body
230 insulating layer
240 anticorrosive coating
300 cell
310 safety valve
400 inductor
410 light source
420 light receiver
500 controller
600 dilution device
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides a battery system including a case 100, a separator 200 having a plurality of vent holes 210 and a plurality of sealing bodies 220, and a plurality of battery cells 300 having a safety valve 310. The housing 100 encloses a receiving space 110. The partition 200 is disposed in the housing 100 and divides the accommodating space 110 into a battery region 112 and an isolation region 114. The plurality of vent holes 210 are opened on the surface of the partition board 200. Each of the sealing bodies 220 encloses one of the vent holes 210. The plurality of battery cells 300 are disposed in the battery region 112, and each of the battery cells 300 is disposed opposite to one of the vent holes 210. The safety valve 310 is disposed on the surface of the battery cell 300 and opposite to the vent 210.
When the battery cell 300 is out of control due to thermal runaway, high temperature gas may be ejected, and it can be understood that the housing 100 may be made of a high temperature resistant material. In one embodiment, the material of the housing 100 is not limited as long as the shape can be maintained, and the inner wall of the housing 100 is coated with a high temperature resistant coating. In one embodiment, the accommodating space 110 enclosed by the housing 100 may be a closed space, which can protect the internal structure and prevent the toxic and flammable gases generated after the thermal runaway of the battery from diffusing to the external environment. The shape of the housing 100 is not limited, and can be designed according to actual needs.
In one embodiment, the partition 200 is fixed to the inner wall of the housing 100 and tightly coupled to the inner wall of the housing 100 to completely isolate the battery region 112 from the isolation region 114. It is to be understood that a plurality of the vent holes 210 extend through the separator 200 to communicate the battery region 112 with the isolation region 114. Each of the vent holes 210 is sealed with one of the sealing bodies 220 to isolate the battery region 112 from the isolation region 114. It is understood that the separator 200 may be made of a high temperature resistant material. In one embodiment, the sealing body 220 may be a plug body plugged in the vent hole 210 or a cover body covering an opening of the vent hole 210.
In one embodiment, the battery cell 300 may be a lithium battery. In one embodiment, the battery cell 300 may be a hard-shell battery. In one embodiment, the battery cell 300 may be a cylindrical lithium ion battery or a square-shell lithium ion battery. The safety valve 310 on the surface of each battery cell 300 is arranged opposite to one vent hole 210, when the battery cell 300 is out of control due to heat, the safety valve 310 is opened, the battery eruption directly rushes into the vent hole 210, and the sealing body 220 is rushed open and then enters the isolation region 114. To facilitate the separation of the sealing body 220 from the vent 210, in one embodiment, the sealing body 220 may be attached to the vent 210 by a small amount of glue. It is understood that the sealing body 220 may be a high temperature resistant material. In one embodiment, the vent hole 210 is in close contact with the surface of the battery cell 300, and the opening of the vent hole 210 surrounds the safety valve 310, so that the spray of the battery cell 300 is isolated from other battery cells 300 and easily enters the vent hole 210. In one embodiment, the safety valve 310 may be disposed at the top of the battery cell 300, and further, may be disposed at the center of the top of the battery cell 300. In one embodiment, the center of the opening of the vent 210 is aligned with the center of the top of the battery cell 300.
In this embodiment, when the battery cell 300 is thermally runaway, the sealing member 220 is opened, so that the spurt generated by the thermal runaway enters the isolation region 114 isolated by the separator 200. The partition board 200 can isolate the eruption of the thermal runaway battery cell 300 from other battery cells 300 which are not subjected to thermal runaway, so that the possibility of thermal runaway propagation is reduced, the safety of the battery module is greatly improved, and the potential safety hazard is reduced.
In the observation of the current experiment, the opening pressure set value of the hard-shell battery safety valve can cause two eruption processes. The primary eruption process is mainly because electrolyte forms steam to rush open the safety valve, and the eruption product is mainly based on electrolyte steam, because the battery temperature is lower relatively and combustible gas concentration is lower this moment, difficult burning. The product of the second eruption mainly takes the gas generated by the reaction of the anode, the cathode and the binder as the main material, and the high temperature and the relatively high concentration of combustible gas easily cause combustion.
In one embodiment, the baffle 200 includes an insulating layer 230. The thermal insulation layer 230 is made of a thermal insulation material. In one embodiment, the spacer 200 may be made of a heat insulating material. In one embodiment, the insulation layer 230 may be a vacuum insulation panel or insulation cotton or aerogel blanket. In this embodiment, the thermal insulation layer 230 can insulate the temperature of the battery eruption, so as to prevent the uncontrolled battery cell 300 from being threatened by high temperature.
In one embodiment, the separator 200 includes a corrosion protection layer 240. The anticorrosion layer 240 is disposed on one side of the partition board 200 close to the isolation area 114, and the anticorrosion layer 240 is made of anticorrosion material. The gas emitted from the thermal runaway of the battery cell 300 tends to be corrosive. The corrosion prevention layer 240 serves to prevent battery eruptions from corroding the separator 200. In one embodiment, the separator 200 is provided with the corrosion prevention layer 240 on a side close to the isolation region 114 and the thermal insulation layer 230 on a side close to the battery region 112, which can prevent corrosion and insulate temperature.
In one embodiment, the corrosion protection layer 240 may be a corrosion-resistant metal layer. The separator 200 can be strengthened by enhancing the strength of the separator 200 while achieving the anti-corrosion effect.
In one embodiment, the sealing member 220 is a cover covering an end of the vent 210 away from the battery cell 300. It will be appreciated that the diameter of the cover is greater than the diameter of the opening of the vent 210 proximate the isolation region 114. The vent hole 210 may be closed by covering the vent hole 210 with a cover. Furthermore, a sealant can be applied to the contact surface between the cover and the partition board 200. In this embodiment, the use of a cover as the seal body 220 facilitates installation and is easily flushed by the battery spray.
In one embodiment, the vent 210 is a conical hole, and the diameter of the opening of the conical hole near the isolation region 114 is larger than the diameter of the opening near the battery region 112.
In one embodiment, the diameter of the opening of the vent 210 near the battery cell 300 may be less than or equal to the diameter of the battery cell 300. In one embodiment, the diameter of the vent hole 210 near the opening of the battery cell 300 may be 18 mm. It can be understood that the section of the conical hole perpendicular to the opening direction of the conical hole is trapezoidal. In one embodiment, the conical bore may have a cone angle of about 10 °.
In this embodiment, the conical hole may reduce the diameter of the opening of the separator 200 near the battery cell 300, thereby enhancing the structural strength of the separator 200. The battery erupts like a fan, and the diameter of the battery eruption gradually increases with time. When the battery spray encounters the inner wall of the conical bore, reflection occurs with a greater upward component of the direction of reflection, thereby causing the battery spray to enter the isolation region 114 more quickly. Meanwhile, the gas sprayed from the battery is influenced by the viscous force, and is reflected by the inner wall of the conical hole and then makes an oblique throwing motion in the direction close to the inner wall of the conical hole, so that the gas sprayed from the battery enters the isolation region 114 and then the backflow is reduced.
Please refer to fig. 3. In one embodiment, the battery system 10 includes a sensor 400, a controller 500, and a dilution device 600. The inductor 400 is mounted on the inner wall of the housing 100 and disposed in the isolation region 114. The sensor 400 is used for sensing the eruption of the battery cell 300. The controller 500 is connected to the inductor 400. The dilution unit 600 is connected to the controller 500 and stores a dilution gas.
In one embodiment, the sensor 400 may be an air pressure sensor, which can sense the air pressure change in the isolation region 114 and convert the air pressure change into an electrical signal to be transmitted to the controller 500. The sensor 400 may also sense the battery burst by monitoring the temperature, sound, image, etc. of the isolation region 114, and then convert the data change into an electrical signal to be transmitted to the controller 500. It is understood that the controller 500 has a data processing function, and can determine whether the battery thermal runaway occurs according to the electrical signal transmitted by the sensor 400. When the controller 500 determines that the thermal runaway of the battery occurs, the dilution unit 600 may be controlled to release the dilution gas to dilute the battery burst gas. In one embodiment, the controller 500 may be a battery management system.
In one embodiment, the diluent gas may be CO2、N2And Ar, etc. The principle being by means of a diluent gas, e.g. CO2、N2And the dilution and thermal effects of Ar, etc., change the ignition limit and temperature, respectively, of the battery spray, thereby reducing its flammability. The dilution ratio can be defined as the ratio of the molar amount of diluent gas to the molar amount of hairspray. As the dilution ratio increases, the upper and lower limits of combustion of the mixture tend to increase, and the mixture tends to be less combustible and less combustible. In addition, as the dilution ratio increases, the heat capacity of the mixture increases greatly, resulting in a decrease in the maximum temperature thereof, and the probability of gas ignition decreases.
In one embodiment, the dilution unit 600 may be mounted within the enclosure 100 or mounted outside the enclosure 100 and in communication with the isolation zone 114 via a conduit.
When the battery is out of control due to heat, the high-temperature eruption gas enters the isolation region 114, which causes the change of the pressure and temperature of the isolation region 114 and also generates sound. In this embodiment, the controller 500 may sense whether the normal state (such as air pressure, temperature, sound, etc.) of the isolation region 114 is damaged through the sensor 400 to determine whether thermal runaway occurs, so as to control the dilution device 600 to release dilution gas to prevent the battery spray from burning. The isolation region 114 formed by the partition board 200 concentrates the battery eruption, so that the environmental change caused by the battery eruption can be monitored more conveniently, the flame retardant treatment can be performed more quickly, and the potential safety hazard is reduced.
Please refer to fig. 2. In one embodiment, the sensor 400 includes a plurality of light sources 410 and a plurality of light receivers 420, each light source 410 is disposed opposite to one of the light receivers 420, and light from each light source 410 is received by the corresponding light receiver 420 opposite to the light source 410, the plurality of air vents 210 are arranged on the surface of the partition 200, and at least one light from the light source 410 is respectively disposed at the openings of each row of the air vents 210 and each column of the air vents 210.
It is understood that the light source 410 may be a unidirectional light source. In one embodiment, the light source 410 may be a laser. The higher concentration of the cell-emitted gas can affect the transmission of light. It is understood that the light receiver 420 may sense a change in the light emitted from the light source 410, convert the change in the light into an electrical signal, and transmit the electrical signal to the controller 500. In one embodiment, a plurality of the light receivers 420 may be electrically connected to the controller 500, respectively. In one embodiment, the plurality of light sources 410 and the plurality of light receivers 420 may be fixed to an inner wall of the housing 100.
It is understood that, from a top view, a plurality of light sources 410 emit light rays to form a grid, and each of the ventilation holes 210 is disposed opposite to an intersection of at least one of the grids. In one embodiment, the intersection of the light grid is located opposite the center point of the opening of the vent 210. In one embodiment, a plurality of light intersections may be correspondingly disposed on one of the ventilation holes 210. In one embodiment, the plurality of light rays corresponding to one of the ventilation holes 210 may be disposed at the same height in a direction perpendicular to the partition board 200, or may be disposed at different heights. It is understood that a plurality of the vent holes 210 are arranged in a lattice on the surface of the partition board 200.
In one embodiment, the distance between the safety valve 310 and the light emitted from the light source 410 may be 2cm to 6cm, which makes the battery burst gas more easily sensed by the light. The thickness of the separator 200 may be less than or equal to 2 cm.
In this embodiment, by arranging a plurality of sets of the light sources 410 and the light receivers 420 which are oppositely arranged, light emitted by a plurality of light sources 410 passes through each row of the vent holes 210 and each column of the vent holes 210, and a plurality of light beams intersect above each vent hole 210. When the battery emits gas, at least two crossed lights can be affected, so that at least two light sensors 420 receive light change signals. The controller 500 can determine which vent 210 has the battery burst gas, i.e., which battery cell 300 is out of thermal control, according to the position of the light sensor 420 receiving the light change.
In one embodiment, the light source 410 is monochromatic. According to the lambert-beer law, the influence of the gas with different concentrations on the light intensity can be accurately known. Therefore, a threshold value may be set, and the controller 500 may determine that the battery thermal runaway occurs only when the variation of the light intensity received by the light receiver 420 reaches the threshold value. In the embodiment, the misjudgment of the thermal runaway of the battery can be avoided, and meanwhile, the method is more digital and accurate and is beneficial to large-scale application.
The invention also provides a fire suppression method for thermal runaway of the battery, which comprises the following steps:
s10, sensing the environmental change of the isolation region 114, and transmitting the environmental change information;
and S20, acquiring the environmental change information, judging whether the battery thermal runaway occurs or not according to the environmental change information, controlling the diluting device 600 to release the diluting gas if the battery thermal runaway is judged to occur, and not acting if the battery thermal runaway is not judged to occur.
In step S10, the environmental change includes a change in information such as air pressure, temperature, sound, object position, and the like. The monitoring can be respectively carried out through an air pressure sensor, a temperature sensor, a sound sensor and an image sensor. In step S20, the environmental change information may be acquired by the controller 500 and it is determined whether battery thermal runaway occurs.
The invention also provides a method for identifying the thermal runaway battery monomer, which is characterized by comprising the following steps of:
s100, receiving light intensity change and transmitting the light intensity change information;
s200, obtaining the light intensity change information, and calculating the position of the light intensity change area, namely the position of the thermal runaway battery monomer according to the position of the light receiver 420 for transmitting the light intensity change information.
In step S200, the light receivers 420 may be numbered for each row and each column, and the vent holes 210 are numbered for the row and column. The controller 500 may be adapted to obtain the light intensity variation information and obtain the number of rows and columns of the vent holes 210 according to the number of rows and columns of the light receiver 420 transmitting the light intensity variation information, so as to determine the position of the battery cell 300 generating the battery thermal runaway.
In one embodiment, the step S200 includes a step S210 of presetting a light intensity threshold, and when the obtained light intensity change reaches the light intensity threshold, determining that the battery thermal runaway occurs. In the embodiment, the misjudgment of the thermal runaway of the battery can be avoided, and meanwhile, the method is more digital and accurate and is beneficial to large-scale application.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A battery system, comprising:
a housing (100) enclosing a receiving space (110);
a partition (200) disposed in the case (100) and dividing the accommodation space (110) into a battery region (112) and an isolation region (114);
a plurality of vent holes (210) which are opened on the surface of the clapboard (200);
a plurality of sealing bodies (220), each sealing body (220) closing one of the vent holes (210);
a plurality of battery cells (300) disposed in the battery region (112), each of the battery cells (300) being disposed opposite to one of the vent holes (210);
the safety valve (310) is arranged on the surface of the battery single body (300) and is opposite to the vent hole (210);
an inductor (400), the inductor (400) being configured to induce the hair spray from the battery cell (300);
the sensor (400) comprises a plurality of light sources (410) and a plurality of light receivers (420), the plurality of light sources (410) and the plurality of light receivers (420) are arranged on the inner side wall of the shell (100) corresponding to the isolation area (114) at intervals, the transmitting port of each light source (410) is opposite to the receiving port of one light receiver (420), the light of each light source (410) is correspondingly received by the light receiver (420) opposite to the light source (410), the light emitted by the plurality of light sources (410) forms a grid, and the intersection points of each vent hole (210) and one grid are arranged oppositely;
a controller (500) connected to the sensor (400).
2. The battery system according to claim 1, wherein the separator (200) comprises a thermal insulation layer (230), and the thermal insulation layer (230) is made of a thermal insulation material.
3. The battery system according to claim 1, wherein the separator (200) comprises an anticorrosive layer (240) disposed on a side of the separator (200) adjacent to the isolation region (114), and the anticorrosive layer (240) is made of an anticorrosive material.
4. The battery system of claim 3, wherein the corrosion protection layer (240) is a corrosion resistant metal layer.
5. The battery system according to claim 1, wherein the sealing body (220) is a cover covering an end of the vent hole (210) away from the battery cell (300).
6. The battery system of claim 1, wherein the vent (210) is a conical bore, and wherein the opening diameter of the conical bore proximate the isolation region (114) is greater than the opening diameter proximate the battery region (112).
7. The battery system of claim 1, comprising:
and a dilution device (600) connected to the controller (500) and storing a dilution gas.
8. The battery system according to claim 7, wherein the plurality of vent holes (210) are arranged on the surface of the separator (200) in an array, and each row of the vent holes (210) and each column of the vent holes (210) are provided with at least one light ray emitted by the light source (410).
9. The battery system of claim 8, wherein the light source (410) is monochromatic.
10. A fire suppression method for thermal runaway of a battery system according to any one of claims 1 to 9, comprising the steps of:
s10, sensing the environmental change of the isolation area (114) and transmitting the environmental change information;
and S20, acquiring the environment change information, judging whether the battery thermal runaway occurs or not according to the environment change information, controlling the diluting device (600) to release the diluting gas if the battery thermal runaway is judged to occur, and not operating if the battery thermal runaway is judged not to occur.
11. A method for identifying a thermal runaway cell in a battery system as claimed in any one of claims 1 to 9, comprising the steps of:
s100, receiving light intensity change and transmitting the light intensity change information;
s200, obtaining the light intensity change information, and calculating the position of the light intensity change area, namely the position of the thermal runaway battery monomer according to the position of the light receiver (420) transmitting the light intensity change information.
12. The method for identifying the thermal runaway battery cell as claimed in claim 11, wherein the step S200 includes a step S210 of presetting a light intensity threshold, and when the obtained light intensity change reaches the light intensity threshold, determining that the thermal runaway battery cell occurs.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810840375.7A CN109119571B (en) | 2018-07-27 | 2018-07-27 | Battery system and application method thereof |
| PCT/CN2018/114265 WO2020019570A1 (en) | 2018-07-27 | 2018-11-07 | Battery system and control method |
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| CN201810840375.7A CN109119571B (en) | 2018-07-27 | 2018-07-27 | Battery system and application method thereof |
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| CN111883702B (en) * | 2019-05-03 | 2023-04-18 | 孚能科技(赣州)股份有限公司 | Battery, battery box and vehicle |
| CN111157903A (en) * | 2020-01-07 | 2020-05-15 | 华霆（合肥）动力技术有限公司 | Battery performance testing method, device and system |
| US20230136015A1 (en) * | 2020-03-31 | 2023-05-04 | Sanyo Electric Co., Ltd. | Battery module |
| CN112002854B (en) * | 2020-07-14 | 2022-11-25 | 华瑞矿业科技有限公司 | Explosion-proof battery |
| CN112002852A (en) * | 2020-07-14 | 2020-11-27 | 华瑞矿业科技有限公司 | Explosion-proof battery |
| CN112002855B (en) * | 2020-07-14 | 2023-07-25 | 华瑞矿业科技有限公司 | Explosion-proof battery |
| CN112002856B (en) * | 2020-07-14 | 2022-06-07 | 华瑞矿业科技有限公司 | Explosion-proof battery |
| CN112002851B (en) * | 2020-07-14 | 2023-07-11 | 华瑞矿业科技有限公司 | Explosion-proof battery |
| CN112018459B (en) * | 2020-07-17 | 2021-09-14 | 清华大学 | Battery system thermal failure diffusion inhibition structure and determination method thereof, and battery system |
| CN114069124A (en) * | 2020-07-30 | 2022-02-18 | 哲弗智能***（上海）有限公司 | Battery box, battery pack and power supply device |
| CN112787020A (en) * | 2021-03-11 | 2021-05-11 | 蔚来汽车科技(安徽)有限公司 | Power battery pack with heat insulation assembly |
| EP4199222A1 (en) * | 2021-12-17 | 2023-06-21 | EnerSys Delaware Inc. | Battery and safety arrangement |
| US11949121B2 (en) | 2021-12-29 | 2024-04-02 | Beta Air, Llc | Systems and methods for a venting seal for battery modules in an electric aircraft |
| CN114552108A (en) * | 2022-02-22 | 2022-05-27 | 德塔云母材料科技(上海)有限公司 | Battery module for automobile |
| CN117013187A (en) * | 2022-04-29 | 2023-11-07 | 宁德时代新能源科技股份有限公司 | Battery and electric equipment |
| CN116505212B (en) * | 2023-06-25 | 2023-12-05 | 深圳市鸿嘉利新能源有限公司 | New energy storage cabinet with fault unit isolation function |
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| DE9312173U1 (en) * | 1993-08-14 | 1993-10-14 | Varta Batterie | Sealing plug for a lead accumulator |
| KR20060037607A (en) * | 2004-10-28 | 2006-05-03 | 삼성에스디아이 주식회사 | Secondary battery and safety device using the same |
| US8277965B2 (en) * | 2009-04-22 | 2012-10-02 | Tesla Motors, Inc. | Battery pack enclosure with controlled thermal runaway release system |
| DE102013200732A1 (en) * | 2013-01-18 | 2014-07-24 | Robert Bosch Gmbh | Apparatus and method for providing safety measures for gas release from a vehicle battery and installation space for a vehicle battery |
| JP5949796B2 (en) * | 2014-01-22 | 2016-07-13 | トヨタ自動車株式会社 | Connection unit |
| CN204011496U (en) * | 2014-07-30 | 2014-12-10 | 浙江超威创元实业有限公司 | A kind of electric motor car that there is the lithium battery of fireproof anti-explosion device and apply this battery |
| CN104577001B (en) * | 2015-01-06 | 2017-11-21 | 浙江虹达特种橡胶制品有限公司 | Lithium battery explosion relief valve |
| CN105280974A (en) * | 2015-11-03 | 2016-01-27 | 安徽芯核防务装备技术股份有限公司 | Power lithium battery leakage alarm and extinguishment integrated device |
| CN105576305A (en) * | 2016-03-11 | 2016-05-11 | 宁德时代新能源科技股份有限公司 | Battery pack safety management system |
| CN206992202U (en) * | 2017-04-12 | 2018-02-09 | 苏州科易新动力科技有限公司 | A kind of module smoke evacuation heat insulation structural |
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| CN108091947B (en) * | 2017-12-18 | 2024-02-02 | 清华大学 | Safety prevention and control system for power battery pack for electric vehicle |
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- 2018-07-27 CN CN201810840375.7A patent/CN109119571B/en active Active
- 2018-11-07 WO PCT/CN2018/114265 patent/WO2020019570A1/en active Application Filing
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| WO2020019570A1 (en) | 2020-01-30 |
| CN109119571A (en) | 2019-01-01 |
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