CN220914419U - Battery with fire extinguishing function and battery pack - Google Patents
Battery with fire extinguishing function and battery pack Download PDFInfo
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- CN220914419U CN220914419U CN202322112108.7U CN202322112108U CN220914419U CN 220914419 U CN220914419 U CN 220914419U CN 202322112108 U CN202322112108 U CN 202322112108U CN 220914419 U CN220914419 U CN 220914419U
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- battery
- battery body
- extinguishing agent
- fire
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- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a battery with a fire extinguishing function and a battery pack, wherein the battery with the fire extinguishing function comprises a battery body and a fire extinguishing device, the fire extinguishing device comprises a fire extinguishing agent storage tank, the fire extinguishing agent storage tank is arranged outside the battery body and is connected with the inside of the battery body, and the fire extinguishing agent storage tank can spray fire extinguishing agent into the inside of the battery body. When the battery body is in thermal runaway, the fire extinguishing agent storage tank connected with the battery body can directly spray the fire extinguishing agent into the battery body, response time is fast, early intervention can be carried out on the thermal runaway of the battery, and heat spreading is delayed or blocked. The fire extinguishing agent is stored in the fire extinguishing agent storage tank to the process of extinguishing the fire to the battery body, and is in a closed space, and is not in contact with the outside, so that the fire extinguishing effect is better.
Description
Technical Field
The utility model relates to the field of battery fire extinguishment, in particular to a battery with a fire extinguishment function and a battery pack.
Background
With the proposal of the national double-carbon strategy, the power battery and the energy storage battery are coming into new development opportunities. Electrochemical energy storage applications, represented by lithium ion batteries, are now extremely widespread and have become the main choice in the market. But the energy density of the large electrochemical cell is high, and the safety performance is still to be improved; under extreme conditions, thermal runaway still occurs with a certain probability, and fire hazards are generated, so that property loss or casualties are caused.
Therefore, the new energy battery is particularly focused on the safety in terms of manufacturing and design, on one hand, the material system, the cell structure and the process control are continuously optimized, and on the other hand, the system protection and the external intervention are continuously improved. Most of the existing new energy storage battery solutions are to install a certain number of batteries in a protective shell, and to arrange fire extinguishing devices outside the battery pack. When the battery pack smokes or fires, the fire is extinguished by the fire extinguishing device. However, the thermal runaway of the battery generally starts from the inside of the battery cell and rapidly spreads to the outside, and when the fire extinguishing device senses/detects the occurrence of the thermal runaway of the battery and starts to extinguish the fire, a certain delay often exists; when the fire extinguishing device is started, the battery is likely to enter a severe heat release stage, and the optimal intervention time is missed, so that the fire extinguishing effect is not ideal, and the property loss or the casualties cannot be greatly reduced. In addition, for a large energy storage battery system, thermal runaway of one battery cell is likely to cause thermal runaway of surrounding adjacent batteries, a chained conduction effect is formed, the whole process is continuously accelerated, and a deflagration phenomenon occurs. Thus, this late-intervention design has certain limitations in practical applications.
Disclosure of utility model
In order to overcome the defects, the utility model aims to provide a battery and a battery pack with a fire extinguishing function, which have quick response time and can perform early intervention on thermal runaway of the battery and delay or block the thermal runaway.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a battery of function of putting out a fire in area, includes battery body and extinguishing device, extinguishing device includes fire extinguishing agent holding vessel, fire extinguishing agent holding vessel set up in the battery body is outside, and with battery body internal connection, fire extinguishing agent holding vessel can spray fire extinguishing agent to the inside of battery body. When the internal thermal runaway of battery body, with the inside fire extinguishing agent holding vessel of connecting of battery body can be to the inside direct injection fire extinguishing agent of battery body, response time is fast, can carry out early intervention to the battery body thermal runaway, delays or blocks the thermal runaway.
Further, the fire extinguishing agent storage tank is internally provided with a fire extinguishing agent, and the fire extinguishing agent is perfluoro-hexanone or heptafluoropropane.
Further, the fire extinguishing device further comprises a fire extinguishing nozzle and a conveying pipeline, wherein the fire extinguishing nozzle is an atomization nozzle, one end of the conveying pipeline is connected with the fire extinguishing agent storage tank, the other end of the conveying pipeline is connected with the fire extinguishing nozzle, and a nozzle of the fire extinguishing nozzle is positioned in the battery body and can spray fire extinguishing agent into the battery body.
Further, a nozzle fusible piece capable of blocking the nozzle is arranged at the nozzle of the fire extinguishing nozzle, and the nozzle fusible piece is melted when the temperature in the battery body reaches a set temperature.
Further, the material of the spout fusible element is selected from any one or more of polypropylene PP, polyethylene PE, linear polyaramid, modified epoxy resin, bismaleimide resin and benzocyclobutene resin.
Further, the battery body comprises a shell and a top cover, the shell and the top cover form an accommodating space, an interface for passing through a fire extinguishing device is arranged on the top cover, and a sealing assembly is arranged between the top cover and the fire extinguishing device.
Further, the sealing assembly comprises an internal thread arranged on the side wall of the connector and an external thread arranged on the outer wall of the fire extinguishing device, the fire extinguishing device is connected with the connector in a threaded mode, the sealing assembly further comprises a sealing ring and a sealing protrusion arranged on the fire extinguishing device, and the sealing ring is sleeved on the fire extinguishing device and located between the top cover and the sealing protrusion.
Further, the sealing assembly comprises a sealant, and the sealant is arranged at the joint of the interface of the battery body cover plate and the fire extinguishing device.
A battery pack with a fire extinguishing function comprises the battery with the fire extinguishing function.
The utility model provides a take group battery of function of putting out a fire, includes a plurality of battery body and extinguishing device, extinguishing device includes fire extinguishing agent holding vessel and pipeline, the fire extinguishing agent holding vessel passes through pipeline and a plurality of battery body internal connection, the fire extinguishing agent holding vessel can spray the fire extinguishing agent to the inside of battery body.
The beneficial effects of the utility model are as follows:
1) Through set up shower nozzle fusible piece in the battery body inside, when battery body thermal runaway, shower nozzle fusible piece is melted, and fire extinguishing agent spouts to the battery body very first time, and response time is fast, carries out early intervention to battery body thermal runaway, delays or blocks the thermal runaway, has prolonged follow-up operation treatment or escape time.
2) Through setting up the fire extinguishing agent shower nozzle inside the battery body, hold the holding vessel setting of fire extinguishing agent outside the battery body, through inside piping connection holding vessel and the battery body, set up like this and make the fire extinguishing agent can not occupy the battery body inner space, do not influence the battery body energy density.
3) According to the application, the storage tank for storing the fire extinguishing agent is connected with the plurality of battery bodies, and the fire extinguishing agent in the storage tank can extinguish the fire after any one of the battery bodies is out of control, so that the consumption of the fire extinguishing agent can be saved.
4) The fire extinguishing agent is stored in the fire extinguishing agent storage tank, is in the closed space in the process of extinguishing the fire to the battery body, and is not in contact with the outside, so that the fire extinguishing effect is better.
5) Through seal assembly's setting, sealed effectual can effectively isolate moisture and oxygen, realizes the seal between battery body and the extinguishing device.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a battery with fire extinguishing function according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a battery with fire extinguishing function according to another embodiment of the present utility model;
FIG. 3 is a cross-sectional view of a seal structure according to an embodiment of the present utility model;
FIG. 4 is a cross-sectional view of a seal structure according to another embodiment of the present utility model;
Fig. 5 is a schematic view of a battery pack with fire extinguishing function according to an embodiment of the present utility model.
In the figure: 1. a battery body; 11. a top cover; 2. a fire extinguishing device; 21. a fire extinguishing agent storage tank; 22. a delivery conduit; 3. a seal assembly; 31. an external thread; 32. a sealing protrusion; 33. and (3) sealing rings.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In this context, unless otherwise specified, the term "/" generally indicates that the associated object is an "or" relationship.
Referring to fig. 1 and 2, a battery with fire extinguishing function comprises a battery body 1 and a fire extinguishing device 2, wherein the energy of the battery body 1 is more than or equal to 250Wh, the fire extinguishing device 2 comprises a fire extinguishing agent storage tank 21, the fire extinguishing agent storage tank 21 is arranged outside the battery body 1 and is connected with the inside of the battery body 1, and the fire extinguishing agent storage tank 21 can spray fire extinguishing agent into the battery body 1. When the internal thermal runaway of the battery body 1, the fire extinguishing agent storage tank connected with the internal of the battery body 1 can directly spray the fire extinguishing agent into the battery body 1, the response time is fast, early intervention can be carried out on the thermal runaway of the battery body 1, and the thermal runaway is delayed or blocked.
In some embodiments, the fire extinguishing agent storage tank 21 maintains positive pressure, when the fire extinguishing nozzle is opened, the fire extinguishing agent can flow out of the fire extinguishing agent storage tank 21 and be ejected from the nozzle through the conveying pipeline 22, the fire extinguishing agent storage tank 21 is directly abutted with the battery body 1, and the weight of the fire extinguishing agent storage tank 21 is supported by the battery body 1 (see the figure 1); the fire extinguishing agent storage tank 21 can also be located directly over the battery body 1, and the conveying pipeline 22 connecting the storage tank 21 and the battery body 1 is linear type corner-free (see figure 2), so that the resistance of fire extinguishing agent spraying is smaller, and the fire extinguishing effect of the fire extinguishing agent is improved. The fire extinguishing agent storage tank 21 contains a fire extinguishing agent selected from the group consisting of perfluorohexanone. The perfluoro-hexanone is colorless, odorless and transparent liquid at normal temperature, and is easy to vaporize, and because the vaporization heat is only 1/25 of that of water and the vapor pressure is 25 times that of water, the perfluoro-hexanone is easy to vaporize and exists in a gaseous state, and the perfluoro-hexanone mainly depends on heat absorption to achieve the effect of fire extinguishment. The fire extinguishing agent storage tank 21 is typically pressurized with an inert gas such as nitrogen, argon, etc., and stored in a high pressure steel cylinder as part of the fire extinguishing system.
In other embodiments, the fire extinguishing agent is heptafluoropropane, which is gaseous at normal temperature, colorless, odorless, non-conductive, non-corrosive, non-environmental limiting, and has a short atmospheric lifetime. The fire extinguishing mechanism mainly interrupts the combustion chain, and the fire extinguishing speed is extremely high.
In some embodiments, the fire extinguishing apparatus 2 further comprises a fire extinguishing nozzle and a delivery pipe 22, one end of the delivery pipe 22 is connected to the fire extinguishing agent storage tank 21, and the other end is connected to the fire extinguishing nozzle, and the fire extinguishing agent in the fire extinguishing agent storage tank 21 can be delivered to the fire extinguishing nozzle through the delivery pipe 22. The nozzle of the fire extinguishing nozzle is positioned in the shell of the battery body 1 and can spray fire extinguishing agent into the shell. The fire extinguishing agent is stored in the fire extinguishing agent storage tank 21, is in the closed space in the process of extinguishing the fire of the battery body 1, and is not in contact with the outside, so that a better fire extinguishing effect can be realized.
In some embodiments, a nozzle fusible member for blocking the nozzle is arranged at the nozzle of the fire extinguishing nozzle, the nozzle fusible member is melted when the temperature in the shell reaches the set temperature, after the nozzle fusible member is melted, the shell of the battery body 1 is communicated with the fire extinguishing agent storage tank 21, and the fire extinguishing agent in the fire extinguishing agent storage tank 21 is sprayed to cool and extinguish the fire of the battery body 1 through the conveying pipe and the fire extinguishing nozzle. Through set up the fusible piece of shower nozzle in battery body 1 inside, when battery body 1 thermal runaway, the fusible piece of shower nozzle is melted, and fire extinguishing agent spouts to battery body 1 very first time, and response time is fast, carries out early intervention to battery body 1 burning, delays or blocks the thermal runaway, has prolonged operation processing or escape time. In this embodiment, the melting temperature of the nozzle fusible member is 90-150 ℃, for example, when the internal temperature of the battery body 1 exceeds 100 ℃, the battery body 1 is about to be out of control, the nozzle fusible member is melted, and the fire extinguishing agent in the fire extinguishing agent storage tank 21 is sprayed to cool and extinguish fire to the battery body 1 through a conveying pipe and a fire extinguishing nozzle.
In some embodiments, the material of the spout fusible piece is polypropylene, namely PP, which is thermoplastic synthetic resin with excellent performance, is colorless semitransparent thermoplastic light general-purpose plastic, can resist corrosion of acid, alkali, salt solution and various organic solvents below 80 ℃, and has chemical resistance, heat resistance, electrical insulation, high strength mechanical performance and good high wear resistance processing performance.
In other embodiments, the spout fusible element is made of polyethylene, abbreviated as PE, and is a thermoplastic resin obtained by polymerizing ethylene. Odorless, nontoxic, matt surface, milky white waxy particles, insoluble in water, slightly soluble in hydrocarbons, etc. Can resist most of acid and alkali corrosion, has small water absorption, can keep softness at low temperature and has high electrical insulation property.
In other embodiments, the spout fusible element is made of linear polyaramid, modified epoxy resin, bismaleimide resin, benzocyclobutene resin, etc., and the material has certain thermal shrinkage and cold expansion characteristics. When the temperature in the battery body 1 is increased (for example, the temperature exceeds 90 ℃), the volume of the battery body is contracted, and the pressurized fire extinguishing agent breaks through the nozzle fusible parts and is sprayed into the battery body 1 to play a role in extinguishing fire.
In some embodiments, the fire suppression agent delivery tube and the fire suppression sprinkler head each have a degree of resistance to high temperatures and deformation. The fire extinguishing nozzle is an atomization nozzle, so that the fire extinguishing agent is atomized in the spraying process of the fire extinguishing agent, the spraying surface can be enlarged, and meanwhile, the rapid gasification of the liquid fire extinguishing agent is facilitated, and the aim of rapid fire extinguishing is fulfilled.
In some embodiments, the battery body 1 includes a case and a top cover 11, the case and the top cover 11 constitute an accommodating space in which the battery cell is disposed. The top cover 11 is provided with a positive electrode column and a negative electrode column for connection with the outside. The top cover 11 is provided with a liquid injection hole and an explosion-proof valve, electrolyte is injected into the battery body 1 through the liquid injection hole, and the safety of the battery body 1 is improved through the explosion-proof valve.
In some embodiments, the fire extinguishing device further comprises a sealing assembly 3, wherein the sealing assembly 3 is arranged on the upper surface (shown in fig. 3) or the lower surface (shown in fig. 4) of the top cover 11, has a good sealing effect, and can isolate moisture and oxygen so as to realize sealing between the battery body 1 and the fire extinguishing device 2. Specifically, the sealing assembly 3 comprises an internal thread arranged on the side wall of the connector and an external thread 31 arranged on the outer wall of the fire extinguishing device 2, the fire extinguishing device 2 is in threaded connection with the connector, the sealing assembly 3 further comprises a sealing ring 33 and a sealing protrusion 32 arranged on the fire extinguishing device 2, the sealing ring 33 is made of polypropylene PP, polytetrafluoroethylene PTFE or polyethylene PE, the sealing ring 33 is sleeved on the fire extinguishing device 2, is positioned between the top cover 11 and the sealing protrusion 32 and is respectively abutted against the top cover 11 and the sealing protrusion 32 so as to improve the tightness of the top cover 11 and the fire extinguishing device 2. The external thread 31 can be arranged on the conveying pipeline 22 connected with the fire extinguishing spray head, and can also be directly arranged on the fire extinguishing spray head, and the specific arrangement position of the external thread 31 is determined according to the actual installation position of the fire extinguishing spray head.
In other embodiments, the sealing assembly 3 comprises a sealant, and the sealant is disposed at the joint of the cover plate 11 and the fire extinguishing device 2, so as to enhance the tightness between the fire extinguishing device 2 and the cover plate of the battery body 1, and prevent water and oxygen from penetrating into the battery body 1 from the joint between the fire extinguishing device 2 and the cover plate of the battery body 1.
Referring to fig. 5, a battery pack with fire extinguishing function in this embodiment includes a fire extinguishing device 2 and a plurality of battery bodies 1, the fire extinguishing device 2 is connected with each of the battery bodies 1, after any one of the battery bodies 1 catches fire, the fire extinguishing device 2 can spray fire extinguishing agent into the battery body 1, perform early intervention on the combustion of the battery body 1, delay or block the heat spreading, and strive for time for later treatment, fire extinguishing or personnel escape.
The working process comprises the following steps: when the potential safety hazard temperature rises in the battery body 1, when the temperature reaches the melting temperature of the nozzle fusible piece, the nozzle fusible piece is melted, the inside of the battery body 1 is communicated with the fire extinguishing agent storage tank 21, and under the action of the pressure, the fire extinguishing agent in the fire extinguishing agent storage tank 21 is sprayed into the battery body 1 through the conveying channel 22 and the fire extinguishing spray head under the action of the pressure, so that the inside of the battery body 1 is cooled, and further the combustion of the battery body 1 is early interfered, and the heat spreading is delayed or blocked. Meanwhile, the BMS system of the battery body 1 diagnoses the battery body 1 and transmits a diagnosis result to a monitoring end, and the monitoring end carries out emergency treatment on thermal runaway of the battery body 1.
In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
It will be understood that when an element is referred to as being "fixed" or "disposed" on 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. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. The utility model provides a take battery of function of putting out a fire, its characterized in that includes battery body (1) and extinguishing device (2), extinguishing device (2) include fire extinguishing agent holding vessel (21), fire extinguishing agent holding vessel (21) set up in battery body (1) outside, and with battery body (1) internal connection, fire extinguishing agent holding vessel (21) can be to the inside fire extinguishing agent that sprays of battery body (1), extinguishing device (2) still include the shower nozzle that puts out a fire, the spout department of shower nozzle is provided with the spout fusible piece that can shutoff spout.
2. The battery with fire extinguishing function according to claim 1, wherein the fire extinguishing agent storage tank (21) is filled with fire extinguishing agent, and the fire extinguishing agent is perfluoro-hexanone or heptafluoropropane.
3. The battery with the fire extinguishing function according to claim 1, wherein the fire extinguishing device (2) further comprises a conveying pipeline (22), the fire extinguishing nozzle is an atomization nozzle, one end of the conveying pipeline (22) is connected with the fire extinguishing agent storage tank (21), the other end of the conveying pipeline is connected with the fire extinguishing nozzle, and a nozzle of the fire extinguishing nozzle is positioned in the battery body (1) and can spray fire extinguishing agent into the battery body (1).
4. A battery with fire extinguishing function according to claim 3, characterized in that the spout fusible element melts when the temperature in the battery body (1) reaches a set temperature.
5. The battery with fire extinguishing function according to claim 4, wherein the material of the spout fusible member is selected from any one of polypropylene PP, polyethylene PE, linear polyaramid, modified epoxy resin, bismaleimide resin, benzocyclobutene resin.
6. The battery with the fire extinguishing function according to claim 1, wherein the battery body (1) comprises a shell and a top cover (11), the shell and the top cover (11) form an accommodating space, an interface for the fire extinguishing device (2) to pass through is arranged on the top cover (11), and a sealing assembly (3) is arranged between the top cover (11) and the fire extinguishing device (2).
7. The battery with the fire extinguishing function according to claim 6, wherein the sealing assembly (3) comprises an internal thread arranged on the side wall of the connector and an external thread (31) arranged on the outer wall of the fire extinguishing device (2), the fire extinguishing device (2) is in threaded connection with the connector, the sealing assembly (3) further comprises a sealing ring (33) and a sealing protrusion (32) arranged on the fire extinguishing device (2), and the sealing ring (33) is sleeved on the fire extinguishing device (2) and is positioned between the top cover (11) and the sealing protrusion (32).
8. A battery with fire extinguishing function according to claim 6 or 7, characterized in that the sealing assembly (3) comprises a sealing glue, which is arranged at the junction of the top cover (11) and the fire extinguishing device (2).
9. A battery pack with fire extinguishing function, characterized by comprising a battery with fire extinguishing function according to any one of claims 1-8.
10. The utility model provides a take group battery of function of putting out a fire, its characterized in that includes extinguishing device (2) and a plurality of battery body (1), extinguishing device (2) are including fire extinguishing agent holding vessel (21) and pipeline (22), fire extinguishing agent holding vessel (21) are through pipeline (22) and a plurality of battery body (1) internal connection, fire extinguishing agent holding vessel (21) can to inside injection fire extinguishing agent of battery body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322112108.7U CN220914419U (en) | 2023-08-07 | 2023-08-07 | Battery with fire extinguishing function and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322112108.7U CN220914419U (en) | 2023-08-07 | 2023-08-07 | Battery with fire extinguishing function and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220914419U true CN220914419U (en) | 2024-05-07 |
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ID=90920447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322112108.7U Active CN220914419U (en) | 2023-08-07 | 2023-08-07 | Battery with fire extinguishing function and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220914419U (en) |
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2023
- 2023-08-07 CN CN202322112108.7U patent/CN220914419U/en active Active
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