Battery storage cabinet, charging cabinet and storage method and charging method thereof

Abstract

The invention provides a battery storage cabinet, a charging cabinet and a storage method and a charging method thereof, the battery storage cabinet comprises a cabinet body, the cabinet body is divided into a plurality of battery compartments, and a controller judges whether batteries are in a dangerous state or not in real time according to values of fire early warning sensors in the battery compartments; if the battery is in a dangerous state, the controller controls the water tank driving mechanism to act, the immersion water tank is driven to a second position, and at the moment, the immersion water tank is located under the opening; and the controller controls the stop block driving mechanism to act, the movable stop block is driven to the second position, and the battery slides down from the roller frame and falls into the water tank from the opening to extinguish fire. In a normal state, the immersion water tank is hidden in the cabinet body and is moved out of the cabinet body only when the battery is in a dangerous state, so that the storage cabinet / charging cabinet does not cause potential safety hazards to children, and the storage cabinet / charging cabinet occupies a small space, so that the corresponding cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of battery storage / charging safety technology, and more specifically, to a battery storage cabinet, a charging cabinet, and a storage method and a charging method thereof. Background Art

[0002] Batteries, especially new energy lithium batteries, are likely to spontaneously combust during use, storage, transportation, and charging. Because the energy density stored in them is very high, once a battery accidentally burns, it is bound to ignite surrounding facilities or other batteries, causing vicious fires that "burn the entire camp" and "harm innocent people", seriously threatening the safety of people's lives and property.

[0003] To solve the above problems, invention patent application CN118888876 A provides a self-disposable battery safety storage system, a charging system and an operating method thereof, wherein the battery is stored or charged in a battery compartment, and a monitoring unit in the battery compartment can monitor whether the battery is about to catch fire or has caught fire. If it is about to catch fire or has caught fire, the controller can control the compartment door to open, and the battery falls from the compartment door to the immersion pool below. The battery is completely immersed in liquid and the combustion is interrupted, thereby achieving self-disposable fire extinguishing.

[0004] However, the immersion tank needs to occupy a certain space, which will increase the corresponding cost. In addition, the immersion tank contains liquid (usually water) for immersing batteries, which will cause safety hazards to children. In order to keep the environment clean, the immersion tank needs to be cleaned or the water needs to be changed frequently, which will also increase the corresponding cost. Summary of the invention

[0005] In order to overcome at least one defect of the above-mentioned prior art, the present invention provides a battery storage cabinet, a charging cabinet and a storage method and a charging method thereof. The storage cabinet / charging cabinet will not cause safety hazards to children, and the storage cabinet / charging cabinet occupies a small space, thereby reducing the corresponding cost.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows: A first aspect of the present invention provides a battery storage cabinet, comprising a cabinet body, wherein the cabinet body is divided into a plurality of battery compartments, wherein one side of the battery compartment is provided with an opening, wherein a roller rack for placing batteries is installed in the battery compartment, wherein the roller rack is inclined toward the opening, wherein a blocking device is provided at the end of the roller rack facing the opening, wherein the blocking device comprises a movable block and a block driving mechanism connected to the movable block in a transmission manner, wherein the movable block has a first position and a second position, wherein when the movable block is located at the first position, the movable block can block the battery from sliding off the roller rack, and when the movable block is located at the second position, the movable block does not block the battery from sliding off the roller rack; A water tank compartment is provided at the inner bottom end of the battery storage cabinet, and the battery storage cabinet also includes an immersion water tank and a water tank driving mechanism transmission-connected to the immersion water tank, the immersion water tank has a first position and a second position, when the immersion water tank is in the first position, the immersion water tank is located in the water tank compartment, when the immersion water tank is in the second position, the immersion water tank is located directly below the opening; A fire warning sensor is provided in the battery compartment, and the battery storage cabinet also includes a controller. The fire warning sensor is electrically connected to an input end of the controller, and an output end of the controller is electrically connected to a block driving mechanism and a water tank driving mechanism, respectively.

[0007] Furthermore, the roller frame includes a frame and a roller, two frames are provided, and a plurality of rollers are installed between the two frames.

[0008] Furthermore, the movable stopper is a hook-shaped structure, the stopper driving mechanism includes a first motor, the output end of the controller is electrically connected to the first motor, and the first motor drives the movable stopper to rotate between the first position and the second position.

[0009] Furthermore, the water tank driving mechanism includes a driving trolley, which includes a frame, a second motor and a plurality of wheels. The immersion water tank is placed on the frame, the output end of the controller is electrically connected to the second motor, and the second motor is transmission-connected to one or more wheels. The driving trolley drives the immersion water tank to move between a first position and a second position.

[0010] Furthermore, a water spray pipe is installed on the cabinet at the top of the water tank compartment, one end of the water spray pipe is connected to the water source, and the other end of the water spray pipe extends to the top of the immersion water tank. A water pump is provided on the water spray pipe, and the water pump is electrically connected to the output end of the controller.

[0011] Furthermore, the battery storage cabinet also includes a backup water tank and a backup water pipe. The backup water tank is arranged on the top of the cabinet. One end of the backup water pipe is connected to the backup water tank, and the other end of the backup water pipe extends to the top of the immersion water tank. A valve is also provided on the backup water pipe.

[0012] A second aspect of the present invention provides a storage method of the battery storage cabinet, comprising the following steps: S1: The controller determines in real time whether the battery is in a dangerous state based on the value of the fire warning sensor in the battery compartment; S2: If the battery is in a dangerous state, the controller controls the water tank driving mechanism to drive the immersion water tank to a second position, at which time the immersion water tank is located directly below the opening; S3: The controller controls the block driving mechanism to move, drives the movable block to the second position, and the battery slides off the roller frame and falls from the opening into the immersion tank to extinguish the fire.

[0013] A third aspect of the present invention provides a battery charging cabinet, comprising the battery storage cabinet, wherein a charging socket is provided in the battery compartment, the charging socket is connected to the mains, a power relay is provided at the charging socket, and the power relay is electrically connected to the output end of the controller.

[0014] Furthermore, the battery charging cabinet also includes a network alarm unit and a charging charging unit. The network alarm unit is electrically connected to the output end of the controller, and the network alarm unit is also communicated with the terminal devices of the administrator and the user through the MQTT cloud server; the charging charging unit is electrically connected to the input end of the controller, and the charging charging unit is also communicated with the terminal device of the user through the MQTT cloud server.

[0015] A third aspect of the present invention provides a charging method for the battery charging cabinet, comprising the following steps: T1: When the charging and charging unit receives the user's charging instruction, the controller controls the power relay to connect the battery to the mains to charge the battery; T2: The controller determines in real time whether the battery is in a dangerous state based on the value of the fire warning sensor in the battery compartment; T3: If the battery is in a dangerous state, the controller controls the power relay to disconnect the battery from the mains, i.e., stop charging; T4: the controller controls the water tank driving mechanism to move and drive the immersion water tank to the second position, at which time the immersion water tank is located directly below the opening; T5: The controller controls the block driving mechanism to move, drives the movable block to the second position, and the battery slides off the roller frame and falls from the opening into the immersion tank to extinguish the fire.

[0016] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows: the present invention provides a battery storage cabinet, a charging cabinet and a storage method and a charging method thereof. The battery storage cabinet includes a cabinet body, which is divided into a plurality of battery compartments. The controller determines whether the battery is in a dangerous state in real time according to the value of the fire warning sensor in the battery compartment; if the battery is in a dangerous state, the controller controls the water tank driving mechanism to drive the immersion water tank to the second position, at which time the immersion water tank is located directly below the opening; the controller controls the block driving mechanism to drive the movable block to the second position, and the battery slides off the roller rack and falls from the opening to the immersion water tank for fire extinguishing. Under normal conditions, the immersion water tank is hidden in the cabinet body and is removed from the cabinet body only when the battery is in a dangerous state. Therefore, the storage cabinet / charging cabinet will not cause safety hazards to children, and the storage cabinet / charging cabinet occupies a small space, thereby reducing the corresponding cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1Schematic diagram of the overall structure of a battery storage cabinet in an embodiment of the present invention.

[0018] Figure 2 It is a schematic front view of a battery in a normal state according to an embodiment of the present invention.

[0019] Figure 3 It is a side view schematic diagram of a battery in a normal state according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the positional relationship between the battery, the roller frame, and the movable stopper when the battery is in a normal state in an embodiment of the present invention.

[0021] Figure 5 It is a three-dimensional schematic diagram of a battery falling in an embodiment of the present invention.

[0022] Figure 6 FIG. 1 is a side view schematic diagram of a battery falling in an embodiment of the present invention.

[0023] Figure 7 The figure is a schematic diagram of the position relationship between the battery, the roller frame and the movable stopper after a battery falls in an embodiment of the present invention.

[0024] Figure 8 Schematic diagram of the structure of the immersion water tank in an embodiment of the present invention.

[0025] Fig. 9 This is a circuit connection block diagram of a battery charging cabinet according to an embodiment of the present invention.

[0026] Fig.10 The figure is a circuit diagram of a battery charging cabinet according to an embodiment of the present invention.

[0027] Among them: 1. cabinet; 2. drum rack; 201. drum; 202. frame; 203. movable block; 4. controller; 5. fire warning sensor; 6. battery; 7. immersion water tank; 8. water spray pipe; 9. charging socket; 10. frame; 11. second motor; 12. wheels. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. Example 1

[0030] like Figure 1-8 As shown, the present embodiment discloses a battery storage cabinet, comprising a cabinet body 1, the cabinet body 1 is divided into a plurality of battery compartments, one side of the battery compartment is provided with an opening, a roller rack 2 for placing batteries 6 is installed in the battery compartment, the roller rack 2 is tilted toward the opening, a blocking device is provided at the end of the roller rack 2 facing the opening, the blocking device comprises a movable block 203 and a block driving mechanism connected to the movable block 203 in a transmission manner, the movable block 203 has a first position and a second position, when the movable block 203 is located at the first position, the movable block 203 can prevent the battery 6 from sliding off the roller rack 2, when the movable block 203 is located at the second position, the movable block 203 does not prevent the battery 6 from sliding off the roller rack 2; A water tank compartment is provided at the inner bottom of the battery storage cabinet, and the battery storage cabinet further comprises an immersion water tank 7 and a water tank driving mechanism transmission-connected to the immersion water tank 7. The immersion water tank 7 has a first position and a second position. When the immersion water tank 7 is located at the first position, the immersion water tank 7 is located in the water tank compartment, and when the immersion water tank 7 is located at the second position, the immersion water tank 7 is located directly below the opening; A fire warning sensor 5 is provided in the battery compartment, and the battery storage cabinet also includes a controller 4. The fire warning sensor 5 is electrically connected to the input end of the controller 4, and the output end of the controller 4 is electrically connected to the block driving mechanism and the water tank driving mechanism respectively.

[0031] Under normal conditions, the immersion water tank is hidden in the cabinet and is removed from the cabinet only when the battery is in a dangerous state. Therefore, the storage cabinet / charging cabinet will not cause safety hazards to children, and the storage cabinet / charging cabinet occupies little space, thereby reducing the corresponding cost.

[0032] In the specific implementation process, the cabinet 1 is made of metal or engineering plastic. Metal has strong mechanical strength and hardness, but it is heavy and difficult to process. Although the mechanical strength and hardness of engineering plastic are not as good as those of metal, it has the advantages of light weight, low cost and easy processing.

[0033] In the specific implementation process, the fire warning sensor 5 is a temperature sensor and / or a smoke sensor, which is arranged on the side wall or top wall of the battery compartment. Since the temperature will rise when the battery 6 is burning or about to burn, and smoke will also be generated, the temperature sensor and / or the smoke sensor can be used to detect whether the battery 6 is burning or about to burn.

[0034] like Figure 3 , Figure 4 As shown, in a specific implementation process, the drum frame 2 includes a frame 202 and a drum 201 , two frames 202 are provided, the frames 202 are fixedly connected to the compartment wall of the battery compartment, and a plurality of drums 201 are installed between the two frames 202 .

[0035] In the specific implementation process, the movable stopper 203 is a hook-shaped structure, and the stopper driving mechanism includes a first motor. The output end of the controller 4 is electrically connected to the first motor, and the first motor drives the movable stopper 203 to rotate between the first position and the second position.

[0036] like Figure 8 As shown, in the specific implementation process, the water tank driving mechanism includes a driving trolley, which includes a frame 10, a second motor 11 and a plurality of wheels 12. The immersion water tank 7 is placed on the frame 10. The output end of the controller 4 is electrically connected to the second motor 11, and the second motor 11 is transmission-connected to one or more wheels 12. The driving trolley drives the immersion water tank 7 to move between the first position and the second position.

[0037] In the specific implementation process, a water spray pipe 8 is installed on the cabinet 1 at the top of the water tank compartment, one end of the water spray pipe 8 is connected to the water source, and the other end of the water spray pipe 8 extends to the top of the immersion water tank 7. A water pump is provided on the water spray pipe 8, and the water pump is electrically connected to the output end of the controller 4. In this way, the immersion water tank 7 does not need to be filled with water under normal circumstances, and the water pump is turned on to fill the immersion water tank 7 with water only when the battery 6 is in a dangerous state, which avoids frequent cleaning or water changes, thereby reducing the corresponding cost.

[0038] In the specific implementation process, the battery storage cabinet also includes a spare water tank and a spare water pipe. The spare water tank is arranged on the top of the cabinet body 1. One end of the spare water pipe is connected to the spare water tank, and the other end of the spare water pipe extends to the top of the immersion water tank 7. A valve is also arranged on the spare water pipe. In special circumstances, such as when the water supply is cut off, it is necessary to open the valve so that the water in the spare water tank can be poured into the immersion water tank 7 through the spare water pipe.

[0039] In a specific implementation process, the controller 4 is arranged on the top of the cabinet 1 .

[0040] In the specific implementation process, the battery storage cabinet also includes an audible and visual alarm electrically connected to the output end of the controller 4, and the audible and visual alarm includes a warning light and a speaker. When the fire warning sensor 5 detects that the battery 6 is burning or about to burn, the controller 4 controls the warning light to light up and the speaker to sound to send out an alarm signal. Example 2

[0041] This embodiment provides a storage method of the battery storage cabinet of embodiment 1, comprising the following steps: S1: The controller 4 determines in real time whether the battery 6 is in a dangerous state according to the value of the fire warning sensor 5 in the battery compartment; S2: If the battery 6 is in a dangerous state, the controller 4 controls the second motor 11 to rotate, and the wheel 12 also rotates, driving the trolley carrying the immersion tank 7 to move to the second position, and the immersion tank 7 is located directly below the opening; at this time, the immersion tank 7 is located directly below the opening; S3: The controller 4 controls the first motor to rotate electrically, and the first motor drives the movable stopper 203 to rotate to the second position, and the battery 6 slides off the drum frame 2 and falls from the opening into the immersion water tank 7 to extinguish the fire.

[0042] It should be noted that the above situation is applicable to the case where there is water in the immersion tank 7. If there is no water in the immersion tank 7, the following steps are also included between steps S2-S3: the controller 4 controls the water pump to start and fill the immersion tank 7 with water until the water level in the immersion tank 7 reaches a certain height.

[0043] It should be noted that when the fire warning sensor 5 detects that the battery 6 is in a dangerous state (the battery 6 is burning or about to burn), the controller 4 controls the warning light to light up and the horn to sound to send out an alarm signal.

[0044] It should be noted that the above situation is applicable to the case where there is water stored in the immersion water tank 7. If there is no water stored in the immersion water tank 7, the following steps are also included between steps S2-S3: the controller 4 controls the water pump to start and fill the immersion water tank 7 with water until the water level in the immersion water tank 7 reaches a certain height.

[0045] It should be noted that, under special circumstances, such as when the water supply is cut off, it is necessary to open the valve so that the water in the standby water tank can be poured into the immersion water tank 7 through the standby water pipe. Example 3

[0046] like Figure 9-10 As shown, this embodiment provides a battery charging cabinet, including the battery storage cabinet of embodiment 1, a charging socket 9 is provided in the battery compartment, the charging socket 9 is connected to the mains, a power relay is provided at the charging socket 9, and the power relay is electrically connected to the output end of the controller 4.

[0047] During the specific implementation process, the battery charging cabinet also includes a network alarm unit and a charging charging unit. The network alarm unit is electrically connected to the output end of the controller 4, and the network alarm unit is also communicated with the terminal devices of the administrator and the user through the MQTT cloud server; the charging charging unit is electrically connected to the input end of the controller 4, and the charging charging unit is also communicated with the terminal device of the user through the MQTT cloud server. Example 4

[0048] This embodiment provides a charging method for a battery charging cabinet of Embodiment 3, comprising the following steps: T1: The user-side terminal accesses the charging and charging unit through the MQTT cloud server. When the charging and charging unit receives the user's charging instruction, the controller 4 controls the power relay to connect the battery 6 to the mains to charge the battery 6; T2: The controller 4 determines in real time whether the battery 6 is in a dangerous state according to the value of the fire warning sensor 5 in the battery compartment; T3: If the battery 6 is in a dangerous state, the controller 4 controls the power relay to disconnect the battery 6 from the mains, i.e., stops charging; T4: the controller 4 controls the second motor 11 to rotate, and the wheel 12 also rotates, driving the trolley carrying the immersion water tank 7 to move to the second position, where the immersion water tank 7 is located directly below the opening; T5: The controller 4 controls the first motor to rotate electrically, and the first motor drives the movable block 203 to rotate to the second position, and the battery 6 slides off the drum frame 2 and falls from the opening into the immersion water tank 7 to extinguish the fire.

[0049] It should be noted that the above situation is applicable to the case where there is water in the immersion water tank 7. If there is no water in the immersion water tank 7, the following steps are also included between steps T4-T5: the controller 4 controls the water pump to start and fill the immersion water tank 7 with water until the water level in the immersion water tank 7 reaches a certain height.

[0050] It should be noted that when the fire warning sensor 5 detects that the battery 6 is in a dangerous state (the battery 6 is burning or about to burn), the controller 4 controls the warning light to light up and the horn to sound to send out an alarm signal.

[0051] It should be noted that when the fire warning sensor 5 detects that the battery 6 is in a dangerous state (the battery 6 is burning or about to burn), the controller 4 also sends an alarm message through the network alarm device, and the alarm message is transmitted to the administrator and user terminal through the MQTT cloud server.

[0052] It should be noted that, under special circumstances, such as when the water supply is cut off, it is necessary to open the valve so that the water in the standby water tank can be poured into the immersion water tank 7 through the standby water pipe.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery storage cabinet, comprising a cabinet body (1), wherein the cabinet body (1) is divided into a plurality of battery compartments, characterized in that: An opening is provided on one side of the battery compartment, a roller frame (2) for placing batteries (6) is installed in the battery compartment, the roller frame (2) is tilted toward the opening, and a blocking device is provided at the end of the roller frame (2) facing the opening, the blocking device comprising a movable block (203) and a block driving mechanism drivingly connected to the movable block (203), the movable block (203) having a first position and a second position, when the movable block (203) is located at the first position, the movable block (203) can block the battery (6) from sliding off the roller frame (2), and when the movable block (203) is located at the second position, the movable block (203) does not block the battery (6) from sliding off the roller frame (2); A water tank compartment is provided at the inner bottom end of the battery storage cabinet, and the battery storage cabinet further comprises an immersion water tank (7) and a water tank drive mechanism drivingly connected to the immersion water tank (7), the immersion water tank (7) having a first position and a second position, when the immersion water tank (7) is located at the first position, the immersion water tank (7) is located in the water tank compartment, and when the immersion water tank (7) is located at the second position, the immersion water tank (7) is located directly below the opening; A fire warning sensor (5) is provided in the battery compartment, and the battery storage cabinet further comprises a controller (4), the fire warning sensor (5) being electrically connected to an input end of the controller (4), and an output end of the controller (4) being electrically connected to a block drive mechanism and a water tank drive mechanism, respectively.

2. The battery storage cabinet according to claim 1, characterized in that: The roller frame (2) comprises a frame (202) and a roller (201), two frames (202) are provided, and a plurality of rollers (201) are installed between the two frames (202).

3. The battery storage cabinet according to claim 1, characterized in that: The movable stopper (203) is a hook-shaped structure, the stopper driving mechanism comprises a first motor, the output end of the controller (4) is electrically connected to the first motor, and the first motor drives the movable stopper (203) to rotate between a first position and a second position.

4. The battery storage cabinet according to claim 1, characterized in that: The water tank driving mechanism comprises a driving trolley, the driving trolley comprises a frame (10), a second motor (11) and a plurality of wheels (12), the submerged water tank (7) is placed on the frame (10), the output end of the controller (4) is electrically connected to the second motor (11), the second motor (11) is drivingly connected to one or more wheels (12), and the driving trolley drives the submerged water tank (7) to move between a first position and a second position.

5. The battery storage cabinet according to claim 1, characterized in that: A water spray pipe (8) is installed on the cabinet (1) at the top of the water tank compartment, one end of the water spray pipe (8) is connected to a water source, and the other end of the water spray pipe (8) extends to the top of the immersion water tank (7). A water pump is provided on the water spray pipe (8), and the water pump is electrically connected to the output end of the controller (4).

6. The battery storage cabinet according to claim 1, characterized in that: The battery storage cabinet further comprises a spare water tank and a spare water pipe. The spare water tank is arranged on the top of the cabinet body (1). One end of the spare water pipe is connected to the spare water tank, and the other end of the spare water pipe extends to the top of the immersion water tank (7). A valve is also arranged on the spare water pipe.

7. A storage method for a battery storage cabinet according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: The controller (4) determines in real time whether the battery (6) is in a dangerous state according to the value of the fire warning sensor (5) in the battery compartment; S2: if the battery (6) is in a dangerous state, the controller (4) controls the water tank driving mechanism to operate and drive the immersion water tank (7) to a second position, at which time the immersion water tank (7) is located directly below the opening; S3: The controller (4) controls the block driving mechanism to move, driving the movable block (203) to the second position, and the battery (6) slides off the roller frame (2) and falls from the opening into the immersion water tank (7) to extinguish the fire.

8. A battery charging cabinet, characterized in that: A battery storage cabinet comprising the battery storage cabinet according to any one of claims 1 to 6, wherein a charging socket (9) is provided in the battery compartment, the charging socket (9) is connected to the mains, a power relay is provided at the charging socket (9), and the power relay is electrically connected to the output end of the controller (4).

9. The battery charging cabinet according to claim 8, characterized in that: The battery charging cabinet further comprises a network alarm unit and a charging and charging unit, wherein the network alarm unit is electrically connected to the output end of the controller (4), and the network alarm unit is also connected to the terminal devices of the administrator and the user via the MQTT cloud server; the charging and charging unit is electrically connected to the input end of the controller (4), and the charging and charging unit is also connected to the terminal devices of the user via the MQTT cloud server.

10. A charging method for the battery charging cabinet according to claim 9, characterized in that: The following steps are involved: T1: When the charging and charging unit receives a charging instruction from the user, the controller (4) controls the power relay to connect the battery (6) to the mains to charge the battery (6); T2: The controller (4) determines in real time whether the battery (6) is in a dangerous state according to the value of the fire warning sensor (5) in the battery compartment; T3: If the battery (6) is in a dangerous state, the controller (4) controls the power relay to disconnect the battery (6) from the mains, i.e., charging is stopped; T4: the controller (4) controls the water tank driving mechanism to move, and drives the immersion water tank (7) to a second position, at which time the immersion water tank (7) is located directly below the opening; T5: The controller (4) controls the block driving mechanism to move, driving the movable block (203) to the second position, and the battery (6) slides off the roller frame (2) and falls from the opening into the immersion water tank (7) to extinguish the fire.

Images