CN112402840A - Fire extinguishing control method for battery pack - Google Patents
Fire extinguishing control method for battery pack Download PDFInfo
- Publication number
- CN112402840A CN112402840A CN202011268655.9A CN202011268655A CN112402840A CN 112402840 A CN112402840 A CN 112402840A CN 202011268655 A CN202011268655 A CN 202011268655A CN 112402840 A CN112402840 A CN 112402840A
- Authority
- CN
- China
- Prior art keywords
- cooling
- spraying
- battery pack
- bms
- thermal runaway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model belongs to the technical field of the battery package, concretely relates to battery package's control method that puts out a fire, this battery package includes: the system comprises a battery module, a BMS control system, a cooling system and a spraying system; the cooling system is provided with a cooling loop for circulating and flowing cooling liquid; the spraying system is connected with the cooling loop; the control method comprises the following steps: and when the BMS control system detects a thermal runaway signal, the cooling liquid is prevented from circularly flowing on the cooling loop downstream of the spraying system. By adopting the technical scheme, when thermal runaway occurs, the circulation of the cooling liquid is prevented on the cooling loop at the downstream of the spray pipe. In the spraying process, the cooling liquid cannot be shunted on the cooling loop, and the spraying effect is ensured.
Description
Technical Field
The disclosure relates to the technical field of battery packs, in particular to a fire extinguishing control method for a battery pack.
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 pack. Therefore, the current battery pack generally adds a spraying system which sprays a fire retardant toward the battery module to extinguish the fire when the battery module is thermally out of control.
Because traditional spraying system need set up the storage jar that independent fire extinguishing agent was used, and the storage jar needs occupy great installation space, when transplanting different motorcycle types with fire-fighting spraying system, has great limitation.
In order to solve the problems, in the prior art, the cooling liquid in the battery pack is used as the spraying liquid, so that the storage tank is omitted for installation, and the installation requirement is met. However, when the battery module is sprayed with the coolant, the coolant may be shunted, resulting in poor spraying effect. Therefore, there is an urgent need to develop a fire extinguishing control method to improve the spraying effect of the spraying system.
Disclosure of Invention
The disclosure provides a fire extinguishing control method for a battery pack, which prevents cooling liquid from circulating on a cooling loop at the downstream of a spray pipe when thermal runaway occurs, and ensures the spraying effect because the cooling liquid cannot be shunted on the cooling loop in the spraying process.
The scheme of the disclosure is as follows:
a fire extinguishing control method for a battery pack, the battery pack comprising: the system comprises a battery module, a BMS control system, a cooling system and a spraying system; the cooling system is provided with a cooling loop for circulating and flowing cooling liquid; the spraying system is connected with the cooling loop;
the control method comprises the following steps:
and when the BMS control system detects a thermal runaway signal, the cooling liquid is prevented from circularly flowing on the cooling loop downstream of the spraying system.
Further, a switch valve is arranged on the cooling loop at the downstream of the spraying system; and when the BMS control system detects a thermal runaway signal, the switching valve is controlled to be closed so as to prevent the cooling liquid from circularly flowing.
Further, the spraying system comprises a spraying pipe for spraying cooling liquid; the shower is burnt through by the flame that thermal runaway produced, forms the shower opening.
And further presetting calibration in the BMS, and adjusting the spraying amount of the spraying system according to the calibration.
In some embodiments, the calibration is a coolant flow rate threshold; the cooling system comprises a water pump and a flow rate meter which are arranged on the cooling loop; the water pump and the flow rate meter are arranged at the upstream of the spraying system and are electrically connected with the BMS control system;
when the flow rate of the cooling liquid is larger than the threshold value, the BMS control system reduces the power of the water pump;
when the flow rate of the coolant is less than the threshold value, the BMS control system increases the power of the water pump.
In some embodiments, the cooling system includes a water pump disposed on the cooling circuit; the diffusion time is designated as thermal runaway;
when the BMS detects a thermal runaway signal, the BMS sends an instruction to improve the power of the water pump, the water pump operates according to the calibrated duration to perform one-time spraying fire-extinguishing operation, and the spraying fire-extinguishing operation can be repeated until the thermal runaway phenomenon disappears;
and when the BMS control system does not detect the thermal runaway signal again, the BMS control system sends an instruction to stop the water pump.
Further, the method for presetting the diffusion time of the thermal runaway in the BMS control system comprises the steps of collecting at least one signal difference value of a voltage difference value, a smoke concentration difference value, a pressure difference value and a temperature difference value generated by the thermal runaway of the battery pack and a duration value corresponding to the signal difference value, and obtaining the diffusion time according to the signal difference value and the time value.
Further, the BMS control system detects a thermal runaway signal of the battery pack through at least one of a smoke sensor, a temperature sensor, a voltage sensor, a current sensor, and a pressure sensor.
This scheme compares with prior art, and BMS control system can stop the coolant liquid to circulate in cooling circuit through the ooff valve, makes the coolant liquid be detained in spraying system and cooling system. The cooling liquid in the water tank can flow to the spray opening completely, so that the phenomenon of shunting in the spray process is avoided, and the spray effect is ensured. And moreover, the cooling loop and the spraying system can only release pressure through the spraying opening, so that the sprayed cooling liquid has high pressure intensity, and the fire extinguishing effect is better.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment;
FIG. 2 is a schematic structural diagram of a cooling system and a spraying system according to the first embodiment;
FIG. 3 is a schematic view of the construction of the first and second sumps;
FIG. 4 is a schematic structural diagram of the second embodiment;
FIG. 5 is a schematic structural view of a cooling system and a spraying system according to a second embodiment;
fig. 6 is a schematic structural view of a cooling system and a spraying system according to a third embodiment.
In the figure, a battery module 1, an upper layer battery module 2, a lower layer battery module 3, a box body 4, a water tank 5, a water pump 6, a cooling pipe 7, a first collecting pipe 8, a second collecting pipe 9, a radiating pipe 10, a spraying pipe 11, a third collecting pipe 12, a switch valve 13, a liquid supply pipe 14, a return pipe 15, a flow rate meter 16, a liquid cooling plate 17, a fourth collecting pipe 18, a spraying switch 19, a first liquid collecting groove 20, a partition plate 201, a side wall 202, a second liquid collecting groove 21 and a baffle plate 211.
Detailed Description
The following is further detailed by the specific embodiments:
example one
The coolant liquid in current battery package circulates in cooling circuit, and at the in-process of putting out a fire that sprays, partial coolant liquid can shunt to cooling circuit to in the water tank 5 that flows back, the thermal runaway phenomenon of unable effective reply battery module. And, in the spraying process, the flow rate of the cooling liquid can affect the spraying effect. When the flow rate of the cooling liquid is small, the spraying strength is insufficient, and the fire cannot be effectively extinguished; when the flow rate of the cooling liquid is high, the cooling liquid loses too fast, and the fire cannot be extinguished for a long time. Therefore, it is necessary to provide a new battery pack spray control method in view of the above problems.
As shown in fig. 1, a battery pack includes a BMS control system, an upper battery module 2, a lower battery module 3, a cooling system, and a spray system. The upper layer battery module 2 and the lower layer battery module 3 each include a plurality of battery modules 1.
As shown in fig. 2, the cooling system includes a cooling circuit in which a cooling liquid circulates, a water tank 5 in which the cooling liquid is stored, and a power device that powers the cooling liquid; the power plant is preferably a water pump 6.
The cooling circuit includes a heat radiation pipe 10 attached to the bottom of the case 4, and a cooling pipe 7 provided between the upper battery module 2 and the lower battery module 3.
Since the lower battery module 3 directly exchanges heat with the case 4, the radiating pipe 10 indirectly cools the lower battery module 3 through the cooling case 4. The radiating pipe 10 is connected to the water tank 5 through a supply pipe 14, and the water pump 6 is installed on the supply pipe 14.
The cooling loop also comprises a first collecting pipe 8 and a second collecting pipe 9; the first header 8 and the second header 9 are connected to each other by a plurality of cooling pipes 7 arranged in parallel. The top of each cooling pipe 7 is used for cooling each row/column of battery modules 1 of the upper battery module 2; the bottom of each cooling tube 7 corresponds to the explosion-proof valve of each row/column of battery modules 1 of the lower-layer battery module 3, and the cooling tube 7 is easily opened after at least the part facing the explosion-proof valve is heated. One end of each of the cooling tubes 7 is connected to a first collecting pipe 8, and the first collecting pipe 8 divides the cooling liquid into the cooling tubes 7; the other ends of the plurality of cooling tubes 7 are connected to a second header 9, and the second header 9 merges the cooling liquid. The first collecting pipe 8 is connected with the radiating pipe 10 and used for cooling liquid to flow in; the second header 9 returns the coolant to the tank 5 through a return pipe 15. And a switch valve 13 is arranged on the water return pipe and is electrically connected with the BMS control system. In this embodiment, the opening formed by heating means that the cooling pipe 7 is easily burned through by flame sprayed from the explosion-proof valve in a thermal runaway environment, and a spray opening is formed on the cooling pipe 7; the on-off valve 13 in this embodiment is a solenoid valve.
The spraying system comprises a plurality of spraying pipes 11 for spraying the battery modules and a collecting pipe for connecting the plurality of spraying pipes 11. In this embodiment, a plurality of parallel spray pipes 11 are arranged above the upper battery module 2, each spray pipe 11 is arranged relative to the explosion-proof valve of each row/column of battery modules 1 of the upper battery module 2, and at least the part of each spray pipe 11 facing the explosion-proof valve is easily opened after being heated. One ends of the plurality of spray pipes 11 are connected to the third collecting pipe 12 in parallel; the other end of the shower pipe 11 is plugged. The third collecting pipe 12 is connected with the first collecting pipe 8, and cooling liquid flows into the spraying pipe 11.
In this embodiment, since the cooling pipe 7 is located above the lower module and the cooling pipe 7 is heated to form the spraying opening, the cooling pipe 7 in this embodiment also serves as the spraying pipe 11 to spray and extinguish the fire to the lower battery module 3.
When the battery pack normally operates, the switch valve 13 is normally opened, and the BMS control system controls the flow rate of the cooling liquid by adjusting the power of the water pump 6 according to the temperature of the battery module to supply the cooling liquid to the cooling system. The cooling liquid in the water tank 5 enters the first collecting pipe 8 through the liquid supply pipe 14 and the radiating pipe 10; a part of the cooling liquid in the first collecting pipe 8 flows back to the water tank 5 through the cooling pipe 7, the second collecting pipe 9 and the return pipe 15 in sequence; another part of the cooling liquid flows into the shower pipe 11 through the third header 12 and stays in the shower pipe 11. The cooling liquid flowing through the radiating pipe 10 indirectly cools the lower battery module 3 by cooling the box body 4; the coolant flowing through the cooling pipe 7 directly cools the upper battery module 2.
When the BMS control system detects the thermal runaway signal, the BMS control system closes the switching valve 13 at the return pipe 15, preventing the coolant from circulating. Flame generated by the lower battery pack is sprayed out through the explosion-proof valve to burn the cooling pipe 7, so that a spraying opening is formed in the cooling pipe 7, and cooling liquid is sprayed to the lower battery module 3 from the spraying opening to extinguish fire. The flame that upper battery module 2 produced burns shower 11, makes to form on the shower 11 and sprays the opening, and the coolant liquid in the shower 11 sprays to put out a fire upper battery module 2.
In this embodiment, the BMS control system can prevent the coolant from circulating in the cooling circuit through the switching valve 13, the coolant stays in the shower pipe 11 and the cooling pipe 7, and when the flame burns the shower pipe 11 and/or the cooling pipe 7, heat loss due to the flow of the coolant is avoided, thereby ensuring that the shower pipe 11 and/or the cooling pipe 7 are easily opened. The cooling liquid in the water tank 5 can flow to the spray opening completely, so that the phenomenon of shunting in the spray process is avoided, and the spray effect is ensured. And moreover, the cooling loop and the spraying system can only release pressure through the spraying opening, so that the sprayed cooling liquid has high pressure intensity, and the fire extinguishing effect is better.
Since the BMS controlling system adjusts the flow rate of the coolant by controlling the power of the water pump 6, when the battery pack is changed from the normal operation state to the thermal runaway state, the flow rate of the coolant is the flow rate when cooling the battery module. In the spraying process, if the flow rate of the cooling liquid is too low, the sprayed cooling liquid cannot inhibit the thermal runaway phenomenon, and the flame cannot be extinguished; if the flow rate of the cooling liquid is too high, the sprayed cooling liquid is seriously wasted, and the fire cannot be continuously extinguished.
The applicant carries out a large amount of experiments of spraying and putting out a fire to the battery package, obtains the data of spraying that can effectively put out a fire, converts the data of spraying into the threshold value of coolant liquid velocity of flow to in presetting this threshold value into BMS control system, BMS control system adjusts the velocity of flow of coolant liquid according to the threshold value, guarantees to spray the effect.
In this embodiment, a flow meter 16 is provided on the cooling circuit, and the flow meter 16 is electrically connected to the BMS control system for monitoring the flow rate of the cooling liquid.
After the switching valve 13 is closed, the BMS controlling system detects the flow rate of the coolant through the flow rate meter 16, and when the flow rate of the coolant is greater than a pre-threshold value in the BMS controlling system, the BMS controlling system sends a command to reduce the power of the water pump 6 to reduce the supply rate of the coolant. When the velocity of flow of coolant liquid is less than the default in the BMS control system, BMS control system sends the instruction and improves the power of 6 pumps, improves the supply rate of coolant liquid, makes the velocity of flow of coolant liquid approach the default in the BMS control system, guarantees that the coolant liquid that sprays can effectively put out a fire.
In this embodiment, the BMS control system detects the thermal runaway signal of the battery pack through at least one of a smoke sensor, a temperature sensor, a voltage sensor, a current sensor, and a pressure sensor.
To ensure that the coolant can be pumped to the shower pipe 11 and the cooling pipe 7 after the on-off valve 13 closes the cooling circuit, and the flow rate meter 16 can detect the flow rate of the coolant, both the water pump 6 and the flow rate meter 16 need to be disposed upstream of the shower pipe 11 and the cooling pipe 7. In this embodiment, the water pump 6 and the flow rate meter 16 are both provided on the liquid supply pipe 14, ensuring that the water tank 5 can continuously supply the shower pipe 11 with the coolant, and the BMS control system can detect the flow rate of the coolant.
As shown in fig. 3, since the coolant sprayed on the battery module is rapidly lost, the utilization rate of the coolant is low, in this embodiment, the first liquid collecting tank 20 is disposed below the upper module, and the second liquid collecting tank 21 is formed below the lower module. The first liquid collecting tank 20 is used for collecting the cooling liquid sprayed by the spraying pipe 11, so that the lower part of the upper-layer module is soaked in the collected cooling liquid, and the upper-layer battery module 2 is favorably cooled. The second liquid collecting tank 21 is used for collecting the cooling liquid sprayed by the cooling pipe 7, so that the lower part of the lower-layer module is soaked in the collected cooling liquid, and the lower-layer battery module 3 is cooled.
In the present embodiment, the first liquid collecting tank 20 includes a partition plate 201 disposed below the cooling pipe 7 and a side wall 202 disposed at an edge of the partition plate 201; the partition plate 201 is provided with a through hole at a position corresponding to the cooling pipe 7 for avoiding the cooling pipe 7, and the through hole is blocked by a fusible material. The first sump 20 rests against the bottom of the tank 4 by a bracket. In this embodiment, the through-holes are preferably plugged with aluminum foil tape to facilitate the flame burning through the cooling tubes 7 above the through-holes. The second liquid collecting tank 21 is composed of the bottom of the box body 4 and the baffle 211 arranged at the bottom of the box body 4, part of the bottom surface of the box body 4 forms the bottom surface of the second liquid collecting tank 21, and part of the side wall of the box body 4 and the baffle 211 enclose the side wall of the second liquid collecting tank 21, so that the structure is simple.
Example two
The difference between the present embodiment and the first embodiment is that, as shown in fig. 4, the battery pack in the present embodiment includes only one layer of battery modules. The battery pack in this embodiment includes BMS control system, battery module, cooling system and sprinkler system.
The battery module includes a plurality of battery modules 1. The cooling system comprises a cooling loop for circulating the cooling liquid, a water tank 5 for storing the cooling liquid and a power device for providing power for the cooling liquid; the power device in the embodiment is preferably a water pump 6;
in the present embodiment, the cooling circuit includes a liquid cooling plate 17 disposed below the battery module, and the liquid cooling plate 17 is connected to the water tank 5 through the liquid supply pipe 14 and the return pipe 15, respectively.
As shown in fig. 5, the spray system in this embodiment includes a plurality of spray pipes 11 arranged in parallel and a fourth collecting pipe 18 connecting the spray pipes 11. Each shower pipe 11 is arranged relative to the explosion-proof valve of each row/column of battery modules 1 of the battery module, and at least the part of the shower pipe 11, which is opposite to the explosion-proof valve, is heated to easily form an opening. One end of each of the plurality of spray pipes 11 is connected to the fourth collecting pipe 18 for the inflow of the cooling liquid; the other ends of the plurality of shower pipes 11 are plugged. The fourth header 18 is connected upstream of the liquid-cooled plate 17.
In this embodiment, the water pump 6 is installed on the supply pipe 14, the return pipe 15 is installed with the on-off valve 13, and the on-off valve 13 is electrically connected to the BMS control system. The BMS control system prevents the coolant from flowing back to the water tank 5 by controlling the switching valve 13, preventing the coolant from circulating.
In this embodiment, when the battery pack normally operates, the switch valve 13 is normally opened, and the BMS control system controls the power of the water pump 6 according to the temperature of the battery cell to pump the cooling liquid with different flow rates for the cooling circuit. Different cooling requirements of the battery module are met. A part of the cooling liquid in the water tank 5 flows through the liquid cooling plate 17 and then flows back to the water tank 5, and the other part of the cooling liquid stays in the shower pipe 11.
When the BMS detecting the thermal runaway signal, the BMS closes the on-off valve 13 at the return pipe 15, preventing the coolant from circulating and causing the coolant to stagnate in the cooling circuit. Flame generated by thermal runaway is upwards sprayed through the explosion-proof valve to burn through the spray pipe 11, so that a spray opening is formed in the spray pipe 11, and the cooling liquid sprays the battery module through the spray opening to extinguish fire.
After the switch valve 13 is closed, the cooling liquid stops flowing, when the spray pipe 11 is burned by flame, heat loss caused by flowing of the cooling liquid can be avoided, and the spray pipe 11 is ensured to be easily opened. Meanwhile, the cooling liquid in the water tank 5 can flow to the spraying opening completely, so that the phenomenon of shunting in the spraying process is avoided, and the spraying effect is ensured. And, whole cooling circuit and spraying system can only pass through the spray opening part pressure release, guarantee that the coolant liquid that sprays has great pressure, and fire control effect is better.
Since the BMS controlling system adjusts the flow rate of the coolant by controlling the power of the water pump 6, when the battery pack is converted from the normal state to the thermal runaway state, the flow rate of the coolant is the flow rate when cooling the battery module. In the spraying process, the flow rate of the cooling liquid is too low, so that the cooling liquid cannot inhibit the thermal runaway phenomenon, and the flame cannot be extinguished; too fast flow rate of coolant liquid can lead to the coolant liquid serious waste, can not keep out a fire. Therefore, in order to realize accurate control of the cooling liquid and guarantee the fire extinguishing effect, the flow rate of the cooling liquid needs to be controlled to adjust the spraying speed. In the present embodiment, the flow rate meter 16 is electrically connected to the BMS control system by adding the flow rate meter 16.
After the switching valve 13 is closed, the BMS controlling system detects the flow rate of the coolant through the flow rate meter 16, and when the flow rate of the coolant is greater than a threshold value in the BMS controlling system, the BMS controlling system sends a command to reduce the power of the water pump 6 to reduce the supply rate of the coolant. When the velocity of flow of coolant liquid is less than the threshold value among the BMS control system, BMS control system sends the instruction and improves the power of water pump 6, improves the supply rate of coolant liquid to realize accurate control velocity of flow.
In this embodiment, the BMS detecting the thermal runaway signal of the battery pack by at least one of the smoke sensor, the temperature sensor, the voltage sensor, the current sensor, and the pressure sensor.
To ensure that the coolant can be pumped to the shower pipe 11 after the on-off valve 13 blocks the circulation of the coolant, and the flow rate meter 16 can detect the flow rate of the coolant. Both the water pump 6 and the flow meter 16 need to be arranged upstream of the shower pipe 11. In this embodiment, the water pump 6 and the flow rate meter 16 are both provided on the liquid supply pipe 14, ensuring that the water tank 5 can continuously supply the shower pipe 11 with the coolant, and the BMS control system can detect the flow rate of the coolant.
The embodiment also has the collecting tank, because only one deck battery module in this embodiment, holds battery module's box 4 and can be used as the collecting tank for collect the coolant liquid that shower 11 sprayed, make the lower part of battery module soak in the coolant liquid of collection, to the cooling of battery module, improve the utilization ratio of coolant liquid.
As shown in fig. 6, a spray switch 19 is optionally provided on the spray pipe 11, the spray switch 19 is an electromagnetic valve, and the BMS control system is electrically connected to the spray switch 19. After the BMS control system detects the thermal runaway signal, the spray pipe 11 forms a spray opening by opening the spray switch 19. The cooling liquid sprays the battery module through the spraying opening to extinguish the fire.
EXAMPLE III
The difference between the first embodiment and the second embodiment is that the flow rate meter on the liquid supply pipe is omitted in the present embodiment, so as to reduce the cost of the spraying system.
In this embodiment, the inventor sets a spraying system on a single battery module, and uses heating or needling, overcharging, and other methods to cause thermal runaway of a single battery core, and records at least one signal difference value of a voltage difference value, a smoke concentration difference value, a pressure difference value, and a temperature difference value occurring in a battery pack, and a duration value corresponding to each signal difference value, so as to obtain a diffusion speed of the thermal runaway and a corresponding diffusion time.
In this embodiment, the diffusion time corresponding to each diffusion process is used as a calibration and preset in the BMS control system. When BMS control system detected the thermal runaway signal, BMS control system sent the instruction and improved 6 power of water pump, and water pump 6 moves according to length of time of demarcation, once sprays the operation of putting out a fire to the battery package.
When the current operation of once spraying and putting out a fire can't restrain the thermal runaway phenomenon, BMS control system can continuously detect the thermal runaway signal, BMS control system send instruction improves water pump 6's power once more, and the repeated operation of putting out a fire that sprays disappears until the thermal runaway phenomenon disappears.
When the BMS control system does not detect the thermal runaway signal again, the BMS control system sends an instruction to stop the operation of the water pump 6.
In this embodiment, BMS control system passes through water pump 6 control time of spraying each time and continuously increases the velocity of flow of coolant liquid, and the thermal runaway phenomenon of battery package is restrained completely to the coolant liquid that sprays until, and it is effectual to spray.
In this embodiment, the BMS detecting a signal difference generated by thermal runaway of the battery pack by at least one of the smoke sensor, the temperature sensor, the voltage sensor, the current sensor, and the pressure sensor.
The disclosure is not limited solely to that described in the specification and the embodiments, and thus additional advantages and modifications may 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 (8)
1. A fire extinguishing control method for a battery pack, the battery pack comprising: the system comprises a battery module, a BMS control system, a cooling system and a spraying system; the cooling system is provided with a cooling loop for circulating and flowing cooling liquid; the spraying system is connected with the cooling loop;
the control method is characterized by comprising the following steps:
and when the BMS control system detects a thermal runaway signal, the cooling liquid is prevented from circularly flowing on the cooling loop downstream of the spraying system.
2. The fire extinguishing control method for a battery pack according to claim 1, characterized in that: a switch valve is arranged on the cooling loop at the downstream of the spraying system; and when the BMS control system detects a thermal runaway signal, the switching valve is controlled to be closed so as to prevent the cooling liquid from circularly flowing.
3. The fire extinguishing control method for a battery pack according to claim 2, characterized in that: the spraying system comprises a spraying pipe for spraying cooling liquid; the shower is burnt through by the flame that thermal runaway produced, forms the shower opening.
4. The fire extinguishing control method for a battery pack according to claim 3, characterized in that: and presetting calibration in a BMS control system, and adjusting the spraying amount of the spraying system according to the calibration.
5. The fire extinguishing control method for a battery pack according to claim 4, characterized in that: the calibration is a cooling liquid flow rate threshold value; the cooling system comprises a water pump and a flow rate meter which are arranged on the cooling loop; the water pump and the flow rate meter are arranged at the upstream of the spraying system and are electrically connected with the BMS control system;
when the flow rate of the cooling liquid is larger than the threshold value, the BMS control system reduces the power of the water pump;
when the flow rate of the coolant is less than the threshold value, the BMS control system increases the power of the water pump.
6. The fire extinguishing control method for a battery pack according to claim 4, characterized in that: the cooling system comprises a water pump arranged on the cooling loop; the diffusion time is designated as thermal runaway;
when the BMS detects a thermal runaway signal, the BMS sends an instruction to improve the power of the water pump, the water pump operates according to the calibrated duration to perform one-time spraying fire-extinguishing operation, and the spraying fire-extinguishing operation can be repeated until the thermal runaway phenomenon disappears;
and when the BMS control system does not detect the thermal runaway signal again, the BMS control system sends an instruction to stop the water pump.
7. The fire extinguishing control method for a battery pack according to claim 6, characterized in that: the method for presetting the diffusion time of the thermal runaway in the BMS control system comprises the steps of collecting at least one signal difference value of a voltage difference value, a smoke concentration difference value, a pressure difference value and a temperature difference value generated by the thermal runaway of the battery pack and a time value corresponding to the signal difference value, and obtaining the diffusion time according to the signal difference value and the time value.
8. The fire extinguishing control method for a battery pack according to any one of claims 5 to 7, characterized in that: the BMS control system detects a thermal runaway signal of the battery pack through at least one sensor of a smoke sensor, a temperature sensor, a voltage sensor, a current sensor and a pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011268655.9A CN112402840A (en) | 2020-11-13 | 2020-11-13 | Fire extinguishing control method for battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011268655.9A CN112402840A (en) | 2020-11-13 | 2020-11-13 | Fire extinguishing control method for battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112402840A true CN112402840A (en) | 2021-02-26 |
Family
ID=74831099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011268655.9A Pending CN112402840A (en) | 2020-11-13 | 2020-11-13 | Fire extinguishing control method for battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112402840A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113117274A (en) * | 2021-04-09 | 2021-07-16 | 北京科易动力科技有限公司 | Cooling system for battery pack |
| CN113764772A (en) * | 2021-08-27 | 2021-12-07 | 中国第一汽车股份有限公司 | Fire suppression device and method for power battery pack, power battery pack and vehicle |
| CN113769294A (en) * | 2021-08-06 | 2021-12-10 | 合肥工业大学 | Novel new energy automobile battery package fire extinguishing systems |
| CN113871753A (en) * | 2021-09-24 | 2021-12-31 | 远景动力技术(江苏)有限公司 | Battery pack |
| CN114768147A (en) * | 2022-04-29 | 2022-07-22 | 江苏大学 | Container energy storage power station with dual-drive fire extinguishing device |
| WO2024198034A1 (en) * | 2023-03-31 | 2024-10-03 | 惠州亿纬锂能股份有限公司 | Fire protection device for battery system, battery system, and fire protection method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958096A (en) * | 2006-09-28 | 2007-05-09 | 彭立敏 | Zonal asphyxiation fire extinguisher system for underground cavity |
| CN207542361U (en) * | 2017-12-08 | 2018-06-26 | 天臣新能源研究南京有限公司 | A kind of immersion cooling structure |
| CN109224344A (en) * | 2018-07-27 | 2019-01-18 | 中国电力科学研究院有限公司 | A kind of extinguishing device |
| CN109361035A (en) * | 2018-10-25 | 2019-02-19 | 广东合新材料研究院有限公司 | A kind of spray cooling type automobile power cell group |
| CN109378094A (en) * | 2018-11-16 | 2019-02-22 | 中广核核电运营有限公司 | The temprature control method of containment spray system flow rate control method and containment |
| CN110112499A (en) * | 2019-04-09 | 2019-08-09 | 江苏大学 | A kind of battery pack compound thermal management system and its control method |
| CN110783662A (en) * | 2019-10-23 | 2020-02-11 | 中铁轨道交通装备有限公司 | Battery box system with high heat dissipation function and control method |
| CN111271927A (en) * | 2020-03-16 | 2020-06-12 | 中建环能建筑工程有限公司 | Automatic cooling system of cable |
| WO2020133750A1 (en) * | 2018-12-28 | 2020-07-02 | 宁德时代新能源科技股份有限公司 | Battery pack |
| CN111509163A (en) * | 2020-05-25 | 2020-08-07 | 重庆金康动力新能源有限公司 | Battery pack with fire extinguishing function |
| CN111514489A (en) * | 2020-04-28 | 2020-08-11 | 九江学院 | Automatic fire extinguishing method and system for new energy automobile battery box and mobile terminal |
| CN111870841A (en) * | 2020-07-20 | 2020-11-03 | 浙江吉智新能源汽车科技有限公司 | Power conversion station system and fire control method thereof |
-
2020
- 2020-11-13 CN CN202011268655.9A patent/CN112402840A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958096A (en) * | 2006-09-28 | 2007-05-09 | 彭立敏 | Zonal asphyxiation fire extinguisher system for underground cavity |
| CN207542361U (en) * | 2017-12-08 | 2018-06-26 | 天臣新能源研究南京有限公司 | A kind of immersion cooling structure |
| CN109224344A (en) * | 2018-07-27 | 2019-01-18 | 中国电力科学研究院有限公司 | A kind of extinguishing device |
| CN109361035A (en) * | 2018-10-25 | 2019-02-19 | 广东合新材料研究院有限公司 | A kind of spray cooling type automobile power cell group |
| CN109378094A (en) * | 2018-11-16 | 2019-02-22 | 中广核核电运营有限公司 | The temprature control method of containment spray system flow rate control method and containment |
| WO2020133750A1 (en) * | 2018-12-28 | 2020-07-02 | 宁德时代新能源科技股份有限公司 | Battery pack |
| CN110112499A (en) * | 2019-04-09 | 2019-08-09 | 江苏大学 | A kind of battery pack compound thermal management system and its control method |
| CN110783662A (en) * | 2019-10-23 | 2020-02-11 | 中铁轨道交通装备有限公司 | Battery box system with high heat dissipation function and control method |
| CN111271927A (en) * | 2020-03-16 | 2020-06-12 | 中建环能建筑工程有限公司 | Automatic cooling system of cable |
| CN111514489A (en) * | 2020-04-28 | 2020-08-11 | 九江学院 | Automatic fire extinguishing method and system for new energy automobile battery box and mobile terminal |
| CN111509163A (en) * | 2020-05-25 | 2020-08-07 | 重庆金康动力新能源有限公司 | Battery pack with fire extinguishing function |
| CN111870841A (en) * | 2020-07-20 | 2020-11-03 | 浙江吉智新能源汽车科技有限公司 | Power conversion station system and fire control method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113117274A (en) * | 2021-04-09 | 2021-07-16 | 北京科易动力科技有限公司 | Cooling system for battery pack |
| CN113769294A (en) * | 2021-08-06 | 2021-12-10 | 合肥工业大学 | Novel new energy automobile battery package fire extinguishing systems |
| CN113764772A (en) * | 2021-08-27 | 2021-12-07 | 中国第一汽车股份有限公司 | Fire suppression device and method for power battery pack, power battery pack and vehicle |
| CN113871753A (en) * | 2021-09-24 | 2021-12-31 | 远景动力技术(江苏)有限公司 | Battery pack |
| CN114768147A (en) * | 2022-04-29 | 2022-07-22 | 江苏大学 | Container energy storage power station with dual-drive fire extinguishing device |
| WO2024198034A1 (en) * | 2023-03-31 | 2024-10-03 | 惠州亿纬锂能股份有限公司 | Fire protection device for battery system, battery system, and fire protection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112402840A (en) | Fire extinguishing control method for battery pack | |
| CN113193261B (en) | Liquid-cooling fire-fighting combined management and control system and management and control method for lithium battery energy storage system | |
| CN114267907B (en) | Thermal safety management system for battery energy storage, control method and application thereof | |
| JP2022538122A (en) | fire suppression equipment | |
| WO2017011974A1 (en) | Battery pack and battery pack system | |
| WO2024002383A1 (en) | Immersion energy storage battery thermal management system and fire control method | |
| CN110620274A (en) | Safety protection device for lithium ion battery | |
| CN112151710B (en) | Battery package thermal safety structure, battery package thermal management system and vehicle | |
| CN210516927U (en) | Safety protection device for lithium ion battery | |
| CN216653185U (en) | Fire extinguishing system and energy storage system | |
| CN114497802A (en) | Immersed liquid-cooled battery energy storage system and working method thereof | |
| CN110380155A (en) | A kind of power battery thermal runaway automatic safety device | |
| CN112604206B (en) | Fire extinguishing system and control method for battery pack | |
| CN215119023U (en) | Photovoltaic power station, liquid cooling energy storage system and fire control unit thereof | |
| CN112038728A (en) | Cooling and fire-fighting hybrid system for energy storage device and control method thereof | |
| CN113889698B (en) | Energy storage cabinet and fire extinguishing system thereof | |
| CN111384341A (en) | Lithium battery box with fireproof function and using method thereof | |
| CN218101441U (en) | Thermal runaway prevention assembly for battery pack, battery pack and vehicle | |
| CN218448104U (en) | Phase-change type liquid cooling fire-fighting combined system for battery cabinet | |
| CN112618994A (en) | Fire extinguishing system applied to lithium ion battery energy storage device | |
| CN114171835A (en) | Lithium battery system for preventing overheating and fire | |
| CN114597543A (en) | Thermal runaway prevention battery pack and control method | |
| CN212542547U (en) | Cooling and fire-fighting hybrid system for energy storage device | |
| CN211530139U (en) | Module box and battery module | |
| CN217280954U (en) | Battery pack with fire-fighting inhibiting function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210226 |