CN212085092U - Battery pack with fire extinguishing function - Google Patents
Battery pack with fire extinguishing function Download PDFInfo
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- CN212085092U CN212085092U CN202020891817.3U CN202020891817U CN212085092U CN 212085092 U CN212085092 U CN 212085092U CN 202020891817 U CN202020891817 U CN 202020891817U CN 212085092 U CN212085092 U CN 212085092U
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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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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model belongs to the technical field of battery packs, in particular to a battery pack with a fire extinguishing function, which comprises a battery unit, a cooling liquid box filled with cooling liquid, a cooling loop communicated with the cooling liquid box, a driving device for enabling the cooling liquid to flow, and a fire extinguishing pipeline communicated with the cooling loop; the fire extinguishing pipeline comprises a spraying pipe which is easy to fuse and spans the battery unit; a control switch is arranged at the joint of the fire extinguishing pipeline and the cooling loop; the control switch controls the cooling liquid tank to alternatively communicate the cooling loop and the fire extinguishing pipeline. Adopt the technical scheme of the utility model, add the shower of easy fusing on the original cooling circuit of battery package, can pinpoint the battery unit department of thermal runaway and put out a fire at a fixed point, compact structure, and the fire extinguishing effect is more excellent, can avoid the battery loss that the alarm misstatement of thermal runaway caused simultaneously.
Description
Technical Field
The utility model relates to a battery package technical field, concretely relates to battery package with function of putting out a fire.
Background
At present, the safety accidents of the electric vehicle frequently occur, wherein one of the major factors causing the safety accidents of the electric vehicle is the spontaneous combustion of the battery. The battery includes the box and is located the inside battery unit of box, releases the high temperature heat flow when battery unit takes place thermal failure, and this high temperature heat flow leaks the back and takes place the burning easily when contacting with the air, and leads to the battery package burning when the heat flow spreads adjacent battery unit, brings serious harm for passenger and driver's personal safety.
Therefore, the conventional power battery is generally provided with a fire-fighting spraying system, and when the battery unit is out of control due to heat, the fire-fighting spraying system can spray flame retardant into the battery pack to cool and extinguish the battery unit.
However, because the existing fire sprinkler system needs to be provided with an independent storage tank for fire extinguishing agents, the storage tank needs to occupy a larger installation space, and when the fire sprinkler system is transplanted to different vehicle types, the fire sprinkler system has great limitation. And what current battery fire extinguishing system adopted is the shower nozzle of putting out a fire, when detecting that the battery takes place the thermal runaway, opens the valve of the pipeline of putting out a fire, makes cooling water spray on the battery, but, current fire extinguishing system can't put out a fire to the battery unit fixed point of thermal runaway to if meet the condition of detection error, will put out a fire to the battery of normal work and spray, lead to the battery to scrap.
Disclosure of Invention
In order to solve the problem, the utility model provides a battery package with function of putting out a fire adds the shower of easy fusing on the original cooling circuit of battery package, can pinpoint the battery unit department that thermal runaway puts out a fire, compact structure, and the fire extinguishing effect, the battery loss that can avoid the wrong report to cause simultaneously.
The scheme of the utility model is as follows:
a battery pack with a fire extinguishing function comprises a battery unit, a cooling liquid tank filled with cooling liquid, a cooling loop communicated to the cooling liquid tank, a driving device enabling the cooling liquid to flow, and a fire extinguishing pipeline communicated with the cooling loop; the fire extinguishing pipeline comprises a spraying pipe which is easy to fuse and spans the battery unit; a control switch is arranged at the joint of the fire extinguishing pipeline and the cooling loop; the control switch controls the cooling liquid tank to alternatively communicate the cooling loop and the fire extinguishing pipeline.
Preferably, one end of the spray pipe is used for cooling liquid to flow in, and the other end of the spray pipe is sealed.
Preferably, the control switch is a three-way valve, and the three-way valve controls the cooling liquid tank and the cooling loop to be normally open.
Preferably, the fire extinguishing system further comprises a three-way joint arranged at the joint, the control switch is a two-way valve arranged on the three-way joint, the two-way valve comprises a first two-way valve and a second two-way valve, the first two-way valve independently controls the fire extinguishing pipeline, the second two-way valve independently controls the cooling circuit, and the first two-way valve and the second two-way valve are both arranged at the downstream of the three-way joint.
Preferably, the spray pipes are arranged in parallel, and the fire extinguishing pipeline further comprises a collecting pipe for connecting the cooling loop and the spray pipes.
Preferably, the spray pipe is internally provided with a reinforcing rib which is longitudinally divided.
Preferably, the battery unit is packaged in a box body, and the control switch is arranged inside the box body.
Preferably, the inner side of the top of the box body above the battery unit is coated with a high temperature and impact resistant coating.
Preferably, a heat insulating material having water absorption is filled between the battery cells.
Preferably, the shower tube is susceptible to breakage under combined impact conditions of high temperature and/or electrolyte and/or high velocity gas flow.
Compared with the prior art, the scheme has the advantages that:
1. the fire extinguishing pipeline is directly arranged on the original liquid cooling system of the battery pack, the battery out of control due to thermal runaway is extinguished by utilizing the cooling liquid in the cooling liquid tank, and the fire extinguishing pipeline and the control switch are only required to be additionally arranged on the original battery pack, so that the structure is simple, the cost is low, the weight is light, and the size is small.
2. Need not to arrange the storage jar that the storage fire extinguishing agent was used alone, the shower that adds and battery valve are small, need not to change the installation space of original battery package, and the transplantable is easily promoted to different motorcycle types.
3. The position of the thermal runaway battery can be accurately positioned, the cooling liquid in the cooling liquid box is utilized to perform fixed-point and centralized fire extinguishing on the thermal runaway battery unit, and the fire extinguishing effect is good.
4. Because the operation of putting out a fire needs to possess two execution conditions of feedback and fusing shower of detected signal simultaneously, when detecting system misstatement information, can not have the coolant liquid blowout in the shower, can avoid leading to the condemned problem of battery package because of detecting system misstatement.
5. Control switch makes coolant liquid case alternative intercommunication cooling circuit and the return circuit of putting out a fire, can avoid the coolant liquid at cooling or the reposition of redundant personnel of the in-process of putting out a fire, guarantees cooling or fire control effect.
6. The connecting end normal close of coolant liquid case and fire-fighting pipeline, under normal condition, during the coolant liquid can not flow into the shower, guarantee that the shower fuses easily. And can also avoid leading to the problem that the shower surface appears the condensation because of filling the shower of coolant liquid and the battery package internal environment difference in temperature is big.
Drawings
FIG. 1 is a schematic structural view of a battery pack with a fire extinguishing function in the practice of the present invention;
FIG. 2 is a schematic view of the cooling circuit and the fire suppression piping inside the cabinet;
FIG. 3 is a schematic view of the battery unit of FIG. 2 with the battery unit removed;
fig. 4 is a schematic sectional structure view of the shower pipe.
In the figure, a battery unit 1, a liquid cooling plate 2, a water inlet pipe 3, a water outlet pipe 4, a fire extinguishing pipeline 5, a collecting pipe 51, a spray pipe 52, a battery control unit 6, a control switch 7, a water pump 8, a cooling liquid tank 9, a box body 10 and a reinforcing rib 11.
Detailed Description
The following is further detailed by the specific embodiments:
as shown in fig. 1, a battery pack with a fire extinguishing function includes a plurality of battery units 1 in an array, a case 10 for enclosing the battery units 1, a coolant tank 9 for storing coolant, a cooling circuit connected to the coolant tank 9, a fire extinguishing pipe 5 for extinguishing fire, a battery control unit 6 having a temperature sensor and a smoke sensor, a control switch 7 connected to the battery control unit 6, and a driving device. Wherein the driving device is a water pump 8.
As shown in fig. 2, the cooling circuit includes a liquid cooling plate 2 closely attached to the lower side of the battery unit 1, and a water inlet pipe 3 and a water outlet pipe 4 for connecting the cooling liquid tank 9, so that the cooling liquid in the cooling liquid tank 9 can circulate along the cooling circuit to cool the battery unit 1. The preferred liquid cooling board 2 of this embodiment is to the cooling of cell 1, easy to assemble, and the cooling effect is good. Existing cooling methods such as cooling pipelines or immersion cooling can also be selected.
A control switch 7 is arranged at the connection of the fire extinguishing line 5 and the cooling circuit. The control switch 7 controls the coolant tank 9 to alternatively communicate the cooling circuit with the fire extinguishing line 5. In this embodiment, the control switch 7 is a three-way valve, which is installed at the connection between the collecting pipe 51 and the water inlet pipe 3 to control the opening and closing of the cooling circuit and the fire extinguishing pipeline 55, wherein the three-way valve controls the valve position at the front end of the fire extinguishing pipeline 5 to be normally closed.
When the battery is in a normal state, the three-way valve enables the cooling liquid tank 9 and the cooling loop to be normally open, enables the cooling liquid tank 9 and the fire extinguishing pipeline 5 to be normally closed, the cooling liquid only flows in the cooling loop, and no cooling liquid flows into the fire extinguishing pipeline 5. Moreover, non-combustion-supporting substances or fire extinguishing substances, such as nitrogen, carbon dioxide, heptafluoropropane, a fluorine-containing fire extinguishing agent, a water-based fire extinguishing agent, aerosol and the like, can be prestored in the fire extinguishing pipeline 5, and oxygen in the fire extinguishing pipeline 5 is discharged, so that the problem that condensation occurs on the surface of the fire extinguishing pipeline 5 due to large temperature difference between the fire extinguishing pipeline 5 filled with cooling liquid and the internal environment of a battery pack can be avoided, and the battery unit 1 with oxygen combustion-supporting thermal runaway in the fire extinguishing pipeline 5 can be avoided; and the fire extinguishing effect can be further promoted by the non-combustion-supporting substances or the fire extinguishing substances prestored in the fire extinguishing pipeline 5. On the other hand, when thermal runaway occurs, the ejected high-temperature air flow first contacts with the spray pipe 52 into which the cooling liquid does not flow, so that a fusion opening is generated, and at this time, the water pump 8 is not started because the valve is not opened yet in the pipeline. When the generated signals such as smoke, pressure, gas and the like are sensed by the sensors and alarm signals are sent, the water pump 8 and the valve are opened, and the signals are almost synchronous or have a small time difference. In addition, even if the alarm signal is detected first, the water pump 8 and the control switch 7 are turned on, and the cooling liquid cannot be conveyed into the spray pipes 52 of the fire extinguishing pipeline 5 by the water pump 8 due to the sealing system of the pipeline and the action of the internal pressure. Compare with the shower 52 that holds the coolant liquid, the shower 52 of this scheme is fused more easily, and then further improves the fire extinguishing effect.
When thermal runaway appears in the battery, the three-way valve makes to be closed state between coolant tank 9 and the cooling circuit, normally opens promptly and closes, makes to be open state between coolant tank 9 and the pipeline 5 of putting out a fire, and normally closed opens promptly, and the coolant liquid in the coolant tank 9 is only gone into the pipeline 5 of putting out a fire by water pump 8, no longer has the coolant liquid to flow into in the liquid-cooled board 2. By the arrangement, the cooling liquid can be prevented from being shunted in the fire extinguishing process, the flow of the cooling liquid in the spray pipe 52 is improved, and the fire extinguishing effect of the battery is further improved.
The control switch 7 in this embodiment is preferably a three-way valve, which is low in cost and convenient to control. Alternatively, two-way valves may be used to control the cooling circuit and the fire suppression pipe 5 separately. Wherein, the first two-way valve is used for controlling the circulation of the cooling liquid between the cooling liquid tank 9 and the fire extinguishing pipeline 5; the second two-way valve is used to control the circulation of the cooling liquid between the cooling liquid tank 9 and the cooling circuit. The fire extinguishing pipeline 5 is connected with the cooling loop through a three-way joint, the upper stream of the three-way joint is connected with the cooling liquid tank 9, and the cooling liquid in the cooling liquid tank 9 can be enabled to flow into the cooling loop or the fire extinguishing pipeline 5 quickly. The first two-way valve and the second two-way valve are both arranged at the downstream of the three-way joint, and when the first two-way valve and the second two-way valve are alternatively opened, the first two-way valve and the second two-way valve cannot interfere with each other. The first two-way valve is normally closed, the second two-way valve is normally open, and the cooling liquid is not shunted when circularly radiating, so that the cooling effect is ensured; meanwhile, the coolant can be prevented from flowing into the fire extinguishing pipeline 5, and condensation on the surface of the fire extinguishing pipeline 5 due to temperature difference is avoided. The opening and closing of the cooling circuit and the fire extinguishing circuit are independently controlled through the two-way valves, and the maintenance is convenient. It should be noted that, as long as a scheme of controlling the fire extinguishing pipeline 5 and the cooling circuit by one option can be realized by adopting a four-way valve, a three-way joint matched with a two-way valve and other multi-channel valves, the scheme belongs to the equivalent scheme of the scheme.
The application sets up the fire extinguishing systems that spray pipe 52 and control switch 7 that easily fuse combine, even meet the condition that detects thermal runaway and take place the false positive, control switch 7 functions, as long as do not have high-temperature gas blowout fuse spray pipe 52 from the explosion-proof valve in battery unit 1, just can not spray the coolant liquid to battery unit 1. Because the fire extinguishing spraying operation needs to have two execution conditions of the feedback of the detection signal and the fusing of the spraying pipe 52, when the detection system reports the wrong information, no cooling liquid is sprayed out of the spraying pipe 52, and the problem that the battery pack is scrapped due to the false alarm of the detection system can be avoided.
Will put out a fire pipeline 5 and inlet tube 3 intercommunication, when the battery takes place the thermal runaway, the coolant liquid in coolant liquid case 9 can be by 8 pump sending to the pipeline 5 of putting out a fire in, can be fast, in time respond to the thermal runaway of battery. Alternatively, the fire extinguishing pipe 5 may be connected to the water outlet pipe 4 (not shown), and the cooling liquid needs to pass through the liquid cooling plate 2 and then flow out from the spraying pipe 52 on the fire extinguishing pipe 5, so as to keep the battery unit 1 cool during fire extinguishing.
The water pump 8 in fig. 1 can be arranged on the water inlet pipe 3 or the water outlet pipe 4, the water pump 8 is the lowest point of the position of the whole cooling loop, so that the water pump 8 is always filled with cooling liquid, and the influence on the water supply speed of the water pump 8 due to the gas remaining in the water pump 8 is avoided. The coolant tank 9 generates negative pressure under the pumping action of the water pump 8, and has the function of air intake from the atmosphere under a certain pressure condition, so that the water pump 8 can run smoothly.
Between battery unit 1, it has thermal insulation material to fill, thermal insulation material of hydroscopicity (melamine thermal insulation cotton, acrylic fiber thermal insulation cotton, glass fiber cloth, silica glass fiber cloth, ceramic fiber cotton, aerogel felt, the combination of one or more materials such as high temperature resistant panel) is preferred to thermal insulation material in this scheme, when taking place thermal runaway, shower 52 sprays the coolant liquid to battery unit 1, hydroscopicity thermal insulation material absorbs the coolant liquid, can form the water layer parcel layer around battery unit 1 and will take place thermal runaway's battery unit 1 parcel, help further improving heat-proof quality, and the coolant liquid that absorbs water thermal insulation layer can guarantee to spray can not flow everywhere and scatter, guarantee fire extinguishing effect.
In the embodiment shown in fig. 3, the spray pipes 52 are arranged in parallel, and each spray pipe 52 extends above the battery unit 1 and is located right above the explosion-proof valve of the battery unit 1. Alternatively, the shower pipe 52 may be a shower pipe 52 arranged in a serpentine shape above the battery cells 1, preferably covering the explosion-proof valve of each battery cell 1, to perform a fire extinguishing function for each battery cell 1.
For reducing the flow resistance of coolant liquid, improve the homogeneity that the coolant liquid flows, and guarantee that the coolant liquid in the pipeline 5 of putting out a fire can flow into the shower 52 fast, realize spraying fast thermal runaway cell 1, the pipeline 5 of putting out a fire of this scheme is equipped with many shower 52 side by side including the pressure manifold 51 that communicates inlet tube 3 usefulness on pressure manifold 51, shower 52 extends to every row/1 top of the battery unit who arranges. That is, the fire extinguishing line 5 further includes a header 51 connecting the cooling circuit and the plurality of shower pipes 52.
One end of the spray pipe 52 is communicated to the pipe wall of the collecting pipe 51, and the other end of the spray pipe 52 is sealed, so that single-head blockage is realized; one end of the collecting pipe 51 is communicated with the water inlet pipe 3, and the other end is sealed to present a single-head blocking state. When the fire extinguishing pipeline 5 utilizes the cooling liquid to put out a fire, the whole fire extinguishing pipeline 5 only has the fusing opening formed by fusing for the cooling liquid to flow out, the pressure of cooling liquid injection can be ensured, and the fire extinguishing effect is further improved. The fire extinguishing pipeline 5 can also adopt only one snakelike spray pipe 52 to replace the scheme. However, compared with the case of only using one serpentine spray pipe 52, the fire extinguishing pipeline 5 using the structure of the collecting pipe 51 and the spray pipe 52 has the advantages of higher structural strength, lower flow resistance, coolant saving, easier realization of multi-row arrangement, and improved stability of the spray pipe 52.
The shower pipe 52 may be a conventional round pipe, but the inventor finds that the round pipe has disadvantages in practical use, such as the size of the round pipe needs to be sufficient for circulating a sufficient amount of cooling liquid, so that the round pipe has a certain height and the height of the battery box needs to be increased; in order to support and fix the circular tube, an additional fixing device is generally required to be arranged, and the problem of insufficient fixing firmness is easy to occur; and the area of the circular tube projected onto the battery unit 1 is small, and when thermal runaway occurs, high-temperature gas sprayed out of the explosion-proof valve cannot easily catch the circular tube above the battery unit 1, so that the fusing time of the circular tube cannot be guaranteed. The inventor improves the structure of a round pipe, the spray pipe 52 is arranged to be a flat pipe, the spray pipe 52 can be accommodated in the existing battery pack box body 10 only by a gap with the height of 3mm, the installation space of the original battery pack can be changed, and the fire extinguishing function of the battery pack can be increased; the surface areas of the upper surface and the lower surface of the flat pipe are large and flat, when the thermal runaway of the battery occurs, high-temperature airflow sprayed out of the explosion-proof valve is easy to capture the lower surface of the spray pipe 52, and the stability of the fire extinguishing effect of the spray pipe 52 is improved; in addition, the spray pipe 52 is a flat pipe and has a flat upper surface, so that the upper surface and the lower surface of the spray pipe 52 can be directly coated with glue and bonded in the box body 10, the mode of installing and fixing the spray pipe 52 is simplified, the fixing mode is firm, and the automobile-mounted spray pipe can adapt to the bumpy environment of an automobile.
To facilitate fusing of the shower 52 to form a fused opening for spraying the cooling fluid, the shower 52 is preferably extruded from a metal (e.g., aluminum, iron, or metal alloy) or plastic (e.g., polyvinyl chloride, polyacrylonitrile, polyethylene, polypropylene, nylon, etc.) having a low melting point. The preferred implementation is a tooling punch, which forms a further weakened area in the local thin wall of the surface, helping to form the fused opening when thermal runaway occurs. The shower 52 may also be formed in one piece using a plastic, extrusion or injection molding process. The high-temperature-resistant and impact-resistant coating similar to mica is arranged on the upper part of the spray pipe 52, so that a fusing opening formed by fusing the spray pipe 52 is not exposed outside the box body 10, and the cooling liquid can be sprayed to the battery unit 1 with thermal runaway by aiming at the cooling liquid.
The spray pipe 52 can also be made of PVC, polyacrylonitrile and other substances which are easily dissolved in the electrolyte (EC, EMC, DEC), after the battery unit 1 is out of control by heat, the electrolyte is sprayed, and the spray pipe 52 forms a fusing opening together under the action of the dissolution of the electrolyte, the impact of air flow and the action of heat, so that the quick response is ensured. As shown in fig. 4, the shower pipe 52 is preferably a harmonica pipe structure, and the reinforcing ribs 11 are longitudinally arranged inside the shower pipe 52, so that the burning area is controlled in a small range, an accurate fixed point effect can be achieved, energy is saved, and the effect of suppressing hot air sprayed out of the battery by the spray pressure is ensured. The coolant may be water, an aqueous solution containing a coolant, an in-vehicle antifreeze, a fluorinated liquid, or the like, and any liquid that can achieve cooling, and fire extinguishing effects is within the scope of the present application.
In this embodiment, the shower pipe 52 may be made of a segmented material, and may be made of a material having a low melting point, a material that is easily fused or dissolved in an electrolyte in a region corresponding to the explosion-proof valve, and a material having a high melting point in a region corresponding to the non-explosion-proof valve. Generally forming a segment.
In addition, the inner side of the top of the box body 10 above the battery unit 1 is also coated with a high-temperature-resistant and impact-resistant coating, or a mica sheet is arranged between the fire extinguishing pipeline 5 and the top of the box body 10, so that the box body 10 is prevented from being burnt through, and the cooling liquid is taken out of the box by sprayed air flow to influence the fire extinguishing effect.
Foretell fire extinguishing pipe way 5 and cooling circuit's hookup location to and establish the control switch 7 at this junction, preferred setting is inside box 10 to guarantee that the box 10 structure of original battery package and the outside water pump 8 of box 10 and coolant liquid case 9 do not take place to change, help transplanting different motorcycle types with this scheme, more be favorable to promoting.
Adopt the technical scheme of the utility model, when temperature sensor checked battery unit 1's cooling demand, battery control unit 6 reported this signal to whole car the control unit, and car the control unit sends out the instruction and lets water pump 8 open, and the coolant liquid in the drive coolant liquid case 9 flows into liquid cooling board 2 from inlet tube 3, and the heat dissipation of help battery unit 1 is cooled down, then flows back to in the coolant liquid case 9 through outlet pipe 4.
Because in the use, need frequently utilize cooling circuit cooling, consequently control coolant liquid case 9 and cooling circuit's valve is normally opened, and the valve on the pipeline 5 that puts out a fire is normally closed.
When the battery unit 1 is out of control due to heat, the detection sensor detects that a signal is reported to the battery control unit 6; the battery control unit 6 reports the signal to the vehicle control unit, and meanwhile, the battery control unit 6 is opened to the existing three-way valve in a normally closed mode and closed in a normally open mode to prepare the fire extinguishing pipeline 5. The whole vehicle control unit sends an instruction to open the water pump 8 at a given rotating speed, and the cooling liquid is introduced into the fire extinguishing pipeline 5 to be put out a fire and cooled. Battery unit 1 after the thermal runaway will put out a fire shower 52 fusing formation fusing opening of pipeline 5, make coolant liquid and battery unit 1 fully contact, reach the cooling purpose of putting out a fire, at whole fire extinguishing process, water pump 8 is opened always, guarantees the continuous supply of coolant liquid.
Because the fire extinguishing operation of this scheme needs to possess the feedback of detected signal and two execution conditions of fusing shower 52 simultaneously, consequently when being in the state of putting out a fire, the operating time of water pump 8 needs to be longer than the time of putting out a fire of shower 52, can guarantee to have a large amount of coolant liquid to spout to put out a fire after shower 52 fuses.
The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.
Claims (10)
1. A battery pack with a fire extinguishing function, comprising a battery unit, characterized in that: the fire extinguishing system also comprises a cooling liquid tank filled with cooling liquid, a cooling loop communicated to the cooling liquid tank, a driving device enabling the cooling liquid to flow and a fire extinguishing pipeline communicated with the cooling loop; the fire extinguishing pipeline comprises a spraying pipe which is easy to fuse and spans the battery unit; a control switch is arranged at the joint of the fire extinguishing pipeline and the cooling loop; the control switch controls the cooling liquid tank to alternatively communicate the cooling loop and the fire extinguishing pipeline.
2. The battery pack having a fire extinguishing function according to claim 1, wherein: one end of the spray pipe is used for cooling liquid to flow in, and the other end of the spray pipe is sealed.
3. The battery pack having a fire extinguishing function according to claim 2, wherein: the control switch is a three-way valve which controls the cooling liquid tank and the cooling loop to be normally open.
4. The battery pack having a fire extinguishing function according to claim 2, wherein: the fire extinguishing system is characterized by further comprising a three-way joint arranged at the joint, the control switch is a two-way valve arranged on the three-way joint, the two-way valve comprises a first two-way valve and a second two-way valve, the first two-way valve controls the fire extinguishing pipeline independently, the second two-way valve controls the cooling circuit independently, and the first two-way valve and the second two-way valve are arranged at the downstream of the three-way joint.
5. The battery pack having a fire extinguishing function according to claim 3 or 4, wherein: the spray pipes are arranged in parallel, and the fire extinguishing pipeline further comprises a collecting pipe for connecting the cooling loop and the spray pipes.
6. The battery pack having a fire extinguishing function according to claim 5, wherein: and reinforcing ribs which are longitudinally divided are arranged in the spraying pipe.
7. The battery pack having a fire extinguishing function according to claim 6, wherein: the battery unit is packaged in the box body, and the control switch is arranged inside the box body.
8. The battery pack having a fire extinguishing function according to claim 7, wherein: the inner side of the top of the box body above the battery unit is coated with a high-temperature resistant and thermal shock resistant coating, and the coating is made of a non-water-absorption fireproof material.
9. The battery pack having a fire extinguishing function according to claim 8, wherein: and heat insulating materials are filled among the battery units, and the heat insulating materials have water absorption.
10. The battery pack having a fire extinguishing function according to claim 9, wherein: the shower pipe is easy to damage under the combined action of high temperature and/or electrolyte and/or high-speed airflow.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020891817.3U CN212085092U (en) | 2020-05-25 | 2020-05-25 | Battery pack with fire extinguishing function |
| EP21175095.5A EP3916885A1 (en) | 2020-05-25 | 2021-05-20 | Battery pack |
| US17/328,357 US11909018B2 (en) | 2020-05-25 | 2021-05-24 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020891817.3U CN212085092U (en) | 2020-05-25 | 2020-05-25 | Battery pack with fire extinguishing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212085092U true CN212085092U (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020891817.3U Active CN212085092U (en) | 2020-05-25 | 2020-05-25 | Battery pack with fire extinguishing function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113594605A (en) * | 2021-07-31 | 2021-11-02 | 浙江米皇新材股份有限公司 | Automobile battery aluminum-clad section |
| WO2022143132A1 (en) * | 2020-12-29 | 2022-07-07 | 长城汽车股份有限公司 | Battery box body and battery pack |
| WO2024026826A1 (en) * | 2022-08-02 | 2024-02-08 | 上海亚大汽车塑料制品有限公司 | Battery pack cooling system capable of preventing thermal runaway propagation of battery pack, and working method of battery pack cooling system |
-
2020
- 2020-05-25 CN CN202020891817.3U patent/CN212085092U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143132A1 (en) * | 2020-12-29 | 2022-07-07 | 长城汽车股份有限公司 | Battery box body and battery pack |
| CN113594605A (en) * | 2021-07-31 | 2021-11-02 | 浙江米皇新材股份有限公司 | Automobile battery aluminum-clad section |
| WO2024026826A1 (en) * | 2022-08-02 | 2024-02-08 | 上海亚大汽车塑料制品有限公司 | Battery pack cooling system capable of preventing thermal runaway propagation of battery pack, and working method of battery pack cooling system |
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