Vehicle and control method thereof

Abstract

The invention discloses a vehicle and a control method thereof, and the vehicle comprises a high-voltage storage battery which is used for driving the vehicle; the fire prevention and control device is used for detecting, alarming and / or inhibiting liquid leakage, thermal runaway abnormity and / or fire of the high-voltage storage battery; a high-voltage storage battery control module; and the low-voltage storage battery is used for supplying power to the fire prevention and control device and the high-voltage storage battery control module. According to the vehicle, the manufacturing cost is reduced, the working time of the fire prevention and control device can be prolonged, and the safety of the vehicle and personnel is effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control, and in particular, to a vehicle and a control method thereof. Background Art

[0002] In the past, there has been no clear requirement for the configuration of the fire prevention and control device for the vehicle power battery. Therefore, there is a situation where the fire prevention and control device is not configured. Moreover, even if the fire prevention and control device is configured, it is only powered by the uninterruptible power supply equipped with itself. Therefore, when the power of the uninterruptible power supply is insufficient, there is a hidden danger that the fire prevention and control device cannot work properly.

[0003] With the implementation of the industry standard JT / T 1461-2023 "Configuration Requirements for Fire Prevention and Control Devices for Passenger Car Lithium-Ion Power Battery Boxes", it is required that: except for vehicle maintenance, the fire prevention and control device can work properly during vehicle operation, charging, and within 72 hours after parking and power-off. Although the requirements of the industry standard can be met by expanding the capacity of the uninterruptible power supply, it will increase the cost and cannot ensure that the fire prevention and control device can still work properly 72 hours after parking. Summary of the Invention

[0004] In view of this, an embodiment of the present invention provides a vehicle to solve the technical problem that the fire prevention and control device cannot work properly when the power of the uninterruptible power supply is insufficient.

[0005] To achieve the above object, according to one aspect of the embodiments of the present invention, an embodiment of the present invention provides a vehicle, including:

[0006] A high-voltage battery;

[0007] A fire prevention and control device for detecting, alarming, and / or suppressing the leakage, thermal runaway abnormality, and / or fire of the high-voltage battery; and

[0008] A low-voltage battery for supplying power to the fire prevention and control device.

[0009] Optionally, the vehicle further includes:

[0010] An uninterruptible power supply for supplying power to the fire prevention and control device.

[0011] Optionally, the low-voltage battery starts to supply power to the fire prevention and control device in response to the start of operation of the high-voltage battery, and stops supplying power to the fire prevention and control device in response to the stop of operation of the high-voltage battery.

[0012] Optionally, in response to the power of the uninterruptible power supply being greater than or equal to a power threshold, the uninterruptible power supply starts to supply power to the fire prevention and control device, and in response to the power of the uninterruptible power supply being less than the power threshold, the uninterruptible power supply stops supplying power to the fire prevention and control device;

[0013] In response to the uninterruptible power supply starting to supply power to the fire prevention and control device, the low-voltage battery stops supplying power to the fire prevention and control device, and in response to the uninterruptible power supply stopping to supply power to the fire prevention and control device, the low-voltage battery starts to supply power to the fire prevention and control device.

[0014] Optionally, in response to the power of the low-voltage battery being greater than or equal to a power threshold, the low-voltage battery starts to supply power to the fire prevention and control device, and in response to the power of the low-voltage battery being less than the power threshold, the low-voltage battery stops supplying power to the fire prevention and control device;

[0015] In response to the low-voltage battery starting to supply power to the fire prevention and control device, the uninterruptible power supply stops supplying power to the fire prevention and control device, and in response to the low-voltage battery stopping to supply power to the fire prevention and control device, the uninterruptible power supply starts to supply power to the fire prevention and control device.

[0016] Optionally, the start of operation of the high-voltage battery includes charging the high-voltage battery from the outside or supplying power from the high-voltage battery to the outside.

[0017] Optionally, the vehicle is a fuel cell vehicle, and the start of operation of the high-voltage battery includes the vehicle starting to drain water.

[0018] In addition, according to another aspect of the embodiments of the present invention, the embodiments of the present invention further provide a control method for a vehicle, including:

[0019] In response to the start of operation of the high-voltage battery, controlling the low-voltage battery to start supplying power to the fire prevention and control device, and in response to the high-voltage battery stopping operation, controlling the low-voltage battery to stop supplying power to the fire prevention and control device.

[0020] Optionally, the control method further includes:

[0021] In response to the power of the uninterruptible power supply being greater than or equal to a power threshold, controlling the uninterruptible power supply to start supplying power to the fire prevention and control device, and controlling the low-voltage battery to stop supplying power to the fire prevention and control device;

[0022] In response to the power of the uninterruptible power supply being less than the power threshold, controlling the uninterruptible power supply to stop supplying power to the fire prevention and control device, and controlling the low-voltage battery to start supplying power to the fire prevention and control device.

[0023] Optionally, the control method further includes:

[0024] In response to the power of the low-voltage battery being greater than or equal to the power threshold, controlling the low-voltage battery to start supplying power to the fire prevention and control device, and controlling the uninterruptible power supply to stop supplying power to the fire prevention and control device;

[0025] In response to the power of the low-voltage battery being less than the power threshold, controlling the low-voltage battery to stop supplying power to the fire prevention and control device, and controlling the uninterruptible power supply to start supplying power to the fire prevention and control device.

[0026] By using the low-voltage battery to supply power to the fire prevention and control device, the present invention can ensure that the fire prevention and control device can work normally within 72 hours or even longer after the vehicle stops and the power is cut off. In the prior art, the low-voltage battery does not supply power to the fire prevention and control device. The present invention uses the low-voltage battery to supply power to the fire prevention and control device, which not only reduces the manufacturing cost, but also can extend the working duration of the fire prevention and control device, effectively ensuring the safety of the high-voltage battery. Moreover, whether the vehicle is equipped with an uninterruptible power supply for the fire prevention and control device itself or not, it can meet the industry standards.

[0027] The further effects of the above non-conventional optional methods will be described in conjunction with specific embodiments below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 is a schematic structural diagram of a vehicle according to a first embodiment of the present invention;

[0030] Figure 2 is a schematic structural diagram of a vehicle according to a second embodiment of the present invention;

[0031] Figure 3 is a flowchart of a vehicle control method of the present invention;

[0032] Figure 4 is a flowchart of another vehicle control method of the present invention;

[0033] Figure 5 is a flowchart of still another vehicle control method of the present invention.

[0034] The reference numerals are as follows:

[0035] 1 - High - voltage battery;

[0036] 2 - Fire prevention and control device;

[0037] 3 - High - voltage battery control module;

[0038] 4 - Low - voltage battery;

[0039] 5 - Uninterruptible power supply. Detailed implementation manners

[0040] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Figure 1 is a schematic structural diagram of a vehicle according to the first embodiment of the present invention. As Figure 1 shown, the embodiment of the present invention provides a vehicle, which includes a high - voltage battery 1, a fire prevention and control device 2, a high - voltage battery control module 3, and a low - voltage battery 4. Among them, the fire prevention and control device 2 is used to detect, alarm, and / or suppress the liquid leakage, thermal runaway abnormality, and / or fire of the high - voltage battery 1, and the low - voltage battery 4 is used to supply power to the fire prevention and control device 2.

[0042] It should be noted that the high - voltage battery 1 is used to drive the motor on the vehicle to operate, so as to drive the vehicle to travel. The function of the high - voltage battery control module 3 is to control the working state of the high - voltage battery 1 and realize its various functions. Whether the high - voltage battery 1 is running or not, the fire prevention and control device 2 detects, alarms, and / or suppresses the liquid leakage, thermal runaway abnormality, and / or fire of the high - voltage battery 1.

[0043] The low - voltage battery 4 is usually used to supply power to auxiliary machines. The high - voltage battery 1 is connected to the low - voltage battery 4 through a low - voltage step - down converter. The low - voltage battery 4 provides power for low - voltage components, and the low - voltage components include but are not limited to various control modules (such as the high - voltage battery control module 3), and also include auxiliary machines such as low - voltage liquid pumps, lights, and meters. In the present invention, the low - voltage battery 4 also supplies power to the fire prevention and control device 2.

[0044] By using the low - voltage battery 4 to supply power to the fire prevention and control device 2, it can ensure that the fire prevention and control device 2 can work normally within 72 hours or even longer after the vehicle stops and the power is cut off.

[0045] In the prior art, the low-voltage battery does not supply power to the fire prevention and control device. In the embodiments of the present invention, the low-voltage battery is used to supply power to the fire prevention and control device, and the uninterruptible power supply is not used, which not only reduces the manufacturing cost, but also can extend the working duration of the fire prevention and control device, effectively ensuring the safety of the high-voltage battery, and thus ensuring the safety of the vehicle and personnel.

[0046] Figure 2 It is a schematic structural diagram of a vehicle according to the second embodiment of the present invention. As Figure 2 shown, in some other embodiments of the present invention, the vehicle further includes an uninterruptible power supply 5, and the uninterruptible power supply 5 is used to supply power to the fire prevention and control device 2. In these embodiments, since the vehicle is also equipped with the uninterruptible power supply 5 of the fire prevention and control device 2 itself, both the low-voltage battery 4 and the uninterruptible power supply 5 can supply power to the fire prevention and control device 2. In this way, it is possible to meet the national standard without expanding the capacity of the uninterruptible power supply, reduce the manufacturing cost, and the use of the uninterruptible power supply 5 of the fire prevention and control device 2 itself for power supply can save the power of the low-voltage battery 4.

[0047] In some embodiments of the present invention, the low-voltage battery 4 starts to supply power to the fire prevention and control device 2 in response to the start of operation of the high-voltage battery 1, and stops supplying power to the fire prevention and control device 2 in response to the stop of operation of the high-voltage battery 1. When the high-voltage battery 1 starts to operate, the possibility of its occurrence of risks increases, and it is more necessary for the fire prevention and control device 2 to detect, alarm and / or suppress the liquid leakage, thermal runaway abnormality and / or fire of the high-voltage battery 1, effectively ensuring the safety of the high-voltage battery, and thus ensuring the safety of the vehicle and personnel. When the high-voltage battery 1 stops operating, the possibility of its occurrence of risks decreases, and power supply to the fire prevention and control device 2 is not carried out, which can save power.

[0048] In some embodiments of the present invention, the uninterruptible power supply 5 starts to supply power to the fire prevention and control device 2 in response to the power of the uninterruptible power supply 5 being greater than or equal to the power threshold, and stops supplying power to the fire prevention and control device 2 in response to the power of the uninterruptible power supply 5 being less than the power threshold; the low-voltage battery 4 stops supplying power to the fire prevention and control device 2 in response to the uninterruptible power supply 5 starting to supply power to the fire prevention and control device 2, and starts to supply power to the fire prevention and control device 2 in response to the uninterruptible power supply 5 stopping supplying power to the fire prevention and control device 2. If both the low-voltage battery 4 and the uninterruptible power supply 5 can supply power to the fire prevention and control device 2, the uninterruptible power supply 5 can be made to supply power to the fire prevention and control device 2 preferentially. When the uninterruptible power supply 5 stops supplying power to the fire prevention and control device 2, the low-voltage battery 4 will start to supply power to the fire prevention and control device 2. In this way, not only can the power of the low-voltage battery 4 be saved, but also the working duration of the fire prevention and control device 2 can be further extended, effectively ensuring the safety of the high-voltage battery 1, and thus effectively ensuring the safety of the vehicle and personnel.

[0049] In some embodiments of the present invention, the low-voltage battery 4 starts to supply power to the fire prevention and control device 2 in response to the power of the low-voltage battery 4 being greater than or equal to the power threshold, and stops supplying power to the fire prevention and control device 2 in response to the power of the low-voltage battery 4 being less than the power threshold; the uninterruptible power supply 5 stops supplying power to the fire prevention and control device 2 in response to the low-voltage battery 4 starting to supply power to the fire prevention and control device 2, and starts to supply power to the fire prevention and control device 2 in response to the low-voltage battery 4 stopping to supply power to the fire prevention and control device 2. If both the low-voltage battery 4 and the uninterruptible power supply 5 can supply power to the fire prevention and control device 2, the low-voltage battery 4 can be made to supply power to the fire prevention and control device 2 preferentially. When the low-voltage battery 4 stops supplying power to the fire prevention and control device 2, the uninterruptible power supply 5 will start to supply power to the fire prevention and control device 2. This can not only save the power of the uninterruptible power supply 5, but also further extend the working duration of the fire prevention and control device 2, effectively ensuring the safety of the high-voltage battery 1, and thus effectively ensuring the safety of the vehicle and personnel.

[0050] It should be noted that the power threshold can be set according to actual needs. For example, it can be set to 0%, 3%, 5%, 8% or 10%, etc. The embodiments of the present invention are not limited thereto.

[0051] In some embodiments of the present invention, the low-voltage battery 4 can start to supply power to the fire prevention and control device 2 before or after supplying power to the high-voltage battery control module 3. In some embodiments of the present invention, the low-voltage battery 4 can start to supply power to the high-voltage battery control module 3 and the fire prevention and control device 2 synchronously.

[0052] In some embodiments of the present invention, the start of operation of the high-voltage battery includes charging the high-voltage battery from the outside or supplying power from the high-voltage battery to the outside.

[0053] In some embodiments of the present invention, the vehicle is a fuel cell vehicle, and the start of operation of the high-voltage battery includes the vehicle starting to drain water. Parking Purge (PPG) means that when the fuel cell vehicle stops, the drainage system of the fuel cell vehicle drains the water in the pipeline, which requires the high-voltage battery 1 to supply power to the drainage system.

[0054] It should be noted that during the driving of the vehicle, the low-voltage battery will charge the uninterruptible power supply, so there is no need to consider the problem of insufficient power of the uninterruptible power supply. However, when the vehicle stops, the low-voltage battery will not charge the uninterruptible power supply, so it is necessary to consider the problem of insufficient power of the uninterruptible power supply.

[0055] After the high-voltage battery 1 stops operating and then starts again, it may be due to scenarios such as charging the high-voltage battery 1 from the outside, supplying power from the high-voltage battery 1 to the outside, or the vehicle starting to drain water while parked. In these scenarios, the likelihood of risks increases, and it is necessary to use the fire prevention and control device 2 to detect, alarm, and / or suppress the liquid leakage, thermal runaway abnormality, and / or fire of the high-voltage battery 1. The present invention can ensure that the fire prevention and control device can operate normally within 72 hours or even longer after the vehicle stops and the power is cut off.

[0056] Figure 3 is a flowchart of a vehicle control method of the present invention. As Figure 3 shown, the control method includes:

[0057] Step S301, in response to the high-voltage battery 1 starting to operate, control the low-voltage battery 4 to start supplying power to the fire prevention and control device 2.

[0058] Step S302, in response to the high-voltage battery 1 stopping to operate, control the low-voltage battery 4 to stop supplying power to the fire prevention and control device 2.

[0059] It should be noted that when performing step S301 and step S302, there is no order of precedence. If the high-voltage battery 1 starts to operate, then step S301 is executed. If the high-voltage battery 1 stops to operate, then step S302 is executed. That is to say, the low-voltage battery 4 starts to supply power to the fire prevention and control device 2 in response to the high-voltage battery 1 starting to operate, and stops supplying power to the fire prevention and control device 2 in response to the high-voltage battery 1 stopping to operate. When the high-voltage battery 1 starts to operate, the likelihood of risks increases, and it is necessary for the low-voltage battery 4 to supply power to the fire prevention and control device 2 so that the fire prevention and control device 2 can detect, alarm, and / or suppress the liquid leakage, thermal runaway abnormality, and / or fire of the high-voltage battery 1.

[0060] By supplying power to the fire prevention and control device through the low-voltage battery, it can be ensured that the fire prevention and control device can operate normally within 72 hours or even longer after the vehicle stops and the power is cut off.

[0061] Figure 4 is a flowchart of another vehicle control method of the present invention. As Figure 4 shown, the control method includes:

[0062] Step S401, in response to the high-voltage battery 1 starting to operate, control the low-voltage battery 4 to start supplying power to the fire prevention and control device 2.

[0063] Step S402, in response to the high-voltage battery 1 stopping to operate, control the low-voltage battery 4 to stop supplying power to the fire prevention and control device 2.

[0064] Step S403: In response to the power of the uninterruptible power supply 5 being greater than or equal to the power threshold, control the uninterruptible power supply 5 to start supplying power to the fire prevention and control device 2, and control the low-voltage battery 4 to stop supplying power to the fire prevention and control device 2.

[0065] Step S404: In response to the power of the uninterruptible power supply 5 being less than the power threshold, control the uninterruptible power supply 5 to stop supplying power to the fire prevention and control device 2, and control the low-voltage battery 4 to start supplying power to the fire prevention and control device 2.

[0066] Both the low-voltage battery 4 and the uninterruptible power supply 5 can supply power to the fire prevention and control device 2, but the uninterruptible power supply 5 has priority in supplying power to the fire prevention and control device 2.

[0067] It should be noted that when performing Step S403 and Step S404, there is no sequence between them. If the power of the uninterruptible power supply 5 is greater than or equal to the power threshold, then execute Step S403; if the power of the uninterruptible power supply 5 is less than the power threshold, then execute Step S404.

[0068] When the power of the uninterruptible power supply 5 is greater than or equal to the power threshold, the uninterruptible power supply 5 starts to supply power to the fire prevention and control device 2, and at this time the low-voltage battery 4 stops supplying power to the fire prevention and control device 2; when the power of the uninterruptible power supply 5 is less than the power threshold, the uninterruptible power supply 5 stops supplying power to the fire prevention and control device 2, and at this time the low-voltage battery 4 will start to supply power to the fire prevention and control device 2. This can not only save the power of the low-voltage battery 4, but also extend the working duration of the fire prevention and control device 2, and effectively ensure the safety of the high-voltage battery 1.

[0069] Optionally, in the case where the high-voltage battery control module 3 stops operating, in response to the uninterruptible power supply 5 stopping to supply power to the fire prevention and control device 2, the low-voltage battery 4 does not supply power to the fire prevention and control device 2.

[0070] If the high-voltage battery control module 3 stops operating, the uninterruptible power supply 5 will still continue to supply power to the fire prevention and control device 2 until the power of the uninterruptible power supply 5 is less than the power threshold, at which time the uninterruptible power supply 5 stops supplying power to the fire prevention and control device 2. If the high-voltage battery control module 3 has stopped operating, unless there is a fault, otherwise the high-voltage battery 1 will not operate either. At this time, the possibility of risk is reduced, and the low-voltage battery 4 does not supply power to the fire prevention and control device 2, which can save power.

[0071] Figure 5 It is a flowchart of another vehicle control method of the present invention. As Figure 5 shown, the control method includes:

[0072] Step S501, in response to the start of operation of the high-voltage battery 1, control the low-voltage battery 4 to start supplying power to the fire prevention and control device 2.

[0073] Step S502, in response to the stop of operation of the high-voltage battery 1, control the low-voltage battery 4 to stop supplying power to the fire prevention and control device 2.

[0074] Step S503, in response to the power of the low-voltage battery 4 being greater than or equal to the power threshold, control the low-voltage battery 4 to start supplying power to the fire prevention and control device 2, and control the uninterruptible power supply 5 to stop supplying power to the fire prevention and control device 2.

[0075] Step S504, in response to the power of the low-voltage battery 4 being less than the power threshold, control the low-voltage battery 4 to stop supplying power to the fire prevention and control device 2, and control the uninterruptible power supply 5 to start supplying power to the fire prevention and control device 2.

[0076] Both the low-voltage battery 4 and the uninterruptible power supply 5 can supply power to the fire prevention and control device 2, but the low-voltage battery 4 has priority in supplying power to the fire prevention and control device 2.

[0077] It should be noted that when performing Step S503 and Step S504, there is no sequence between them. If the power of the low-voltage battery 4 is greater than or equal to the power threshold, then perform Step S503; if the power of the low-voltage battery 4 is less than the power threshold, then perform Step S504.

[0078] When the power of the low-voltage battery 4 is greater than or equal to the power threshold, the low-voltage battery 4 starts to supply power to the fire prevention and control device 2, and at this time the uninterruptible power supply 5 stops supplying power to the fire prevention and control device 2; when the power of the low-voltage battery 4 is less than the power threshold, the low-voltage battery 4 stops supplying power to the fire prevention and control device 2, and at this time the uninterruptible power supply 5 will start to supply power to the fire prevention and control device 2. This can not only save the power of the uninterruptible power supply 5, but also extend the working duration of the fire prevention and control device 2, effectively ensuring the safety of the high-voltage battery 1.

[0079] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vehicle, characterized in that, The vehicle includes: A high-voltage battery; A fire prevention and control device for detecting, alarming and / or suppressing leakage, thermal runaway abnormality and / or fire of the high-voltage battery; and A low-voltage battery for supplying power to the fire prevention and control device.

2. The vehicle according to claim 1, characterized in that, The vehicle further includes: An uninterruptible power supply for supplying power to the fire prevention and control device.

3. The vehicle according to claim 1 or 2, characterized in that, The low-voltage battery starts to supply power to the fire prevention and control device in response to the start of operation of the high-voltage battery, and stops supplying power to the fire prevention and control device in response to the stop of operation of the high-voltage battery.

4. The vehicle according to claim 2, characterized in that, The uninterruptible power supply starts to supply power to the fire prevention and control device in response to the power of the uninterruptible power supply being greater than or equal to the power threshold, and stops supplying power to the fire prevention and control device in response to the power of the uninterruptible power supply being less than the power threshold; The low-voltage battery stops supplying power to the fire prevention and control device in response to the uninterruptible power supply starting to supply power to the fire prevention and control device, and starts to supply power to the fire prevention and control device in response to the uninterruptible power supply stopping to supply power to the fire prevention and control device.

5. The vehicle according to claim 2, characterized in that, The low-voltage battery starts to supply power to the fire prevention and control device in response to the power of the low-voltage battery being greater than or equal to the power threshold, and stops supplying power to the fire prevention and control device in response to the power of the low-voltage battery being less than the power threshold; The uninterruptible power supply stops supplying power to the fire prevention and control device in response to the low-voltage battery starting to supply power to the fire prevention and control device, and starts to supply power to the fire prevention and control device in response to the low-voltage battery stopping to supply power to the fire prevention and control device.

6. The vehicle according to claim 3, characterized in that, The start of operation of the high-voltage battery includes charging the high-voltage battery from the outside or supplying power from the high-voltage battery to the outside.

7. The vehicle according to claim 3, characterized in that, The vehicle is a fuel cell vehicle, and the start of operation of the high-voltage battery includes the vehicle starting to drain water.

8. A control method for a vehicle, characterized in that, The control method includes: In response to the start of operation of the high-voltage battery, controlling the low-voltage battery to start supplying power to the fire prevention and control device, and in response to the stop of operation of the high-voltage battery, controlling the low-voltage battery to stop supplying power to the fire prevention and control device.

9. The control method of a vehicle according to claim 8, characterized in that, It further includes: In response to the power of the uninterruptible power supply being greater than or equal to the power threshold, controlling the uninterruptible power supply to start supplying power to the fire prevention and control device, and controlling the low-voltage battery to stop supplying power to the fire prevention and control device; In response to the power of the uninterruptible power supply being less than the power threshold, controlling the uninterruptible power supply to stop supplying power to the fire prevention and control device, and controlling the low-voltage battery to start supplying power to the fire prevention and control device.

10. The control method of the vehicle according to claim 8, wherein, It further includes: In response to the power of the low-voltage battery being greater than or equal to the power threshold, controlling the low-voltage battery to start supplying power to the fire prevention and control device, and controlling the uninterruptible power supply to stop supplying power to the fire prevention and control device; In response to the power of the low-voltage battery being less than the power threshold, controlling the low-voltage battery to stop supplying power to the fire prevention and control device, and controlling the uninterruptible power supply to start supplying power to the fire prevention and control device.

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