A battery drawer capable of realizing precise fire extinguishing and its distributed energy storage device

Abstract

The present invention provides a battery drawer and distributed energy storage device capable of realizing precise fire extinguishing, which can have the characteristics of high safety, high efficiency and intelligence. The battery drawer comprises: a battery drawer box, a lateral moving mechanism, a longitudinal moving mechanism and a mobile firefighting assembly. A fire hose adapter is arranged on the first end plate of the battery drawer box, and a plurality of lithium batteries are fixedly installed at the bottom of the battery drawer box; the lateral moving mechanism is fixedly arranged on the side plate of the battery drawer box; the two ends of the longitudinal moving mechanism are respectively connected to the lateral moving mechanism for sliding; the mobile firefighting assembly is installed on the longitudinal moving mechanism, the mobile firefighting assembly can slide based on the longitudinal moving mechanism, and the mobile firefighting assembly is connected to the fire hose adapter. The distributed energy storage device comprises the above-mentioned battery drawer, energy storage device cabinet, fixed firefighting branch circuit, fixed firefighting main circuit and fire extinguisher.

Description

Technical Field

[0001] The present invention relates to the field of small lithium battery energy storage, and in particular to a battery drawer capable of realizing precise fire extinguishing and a distributed energy storage device thereof. Background Art

[0002] With the advancement of power industry technology, distributed power generation technology has become a hot topic in the power industry, and its share in power production has increased rapidly. Based on the stability of the entire system and the economic efficiency of electricity prices, distributed power generation systems will be equipped with a certain proportion of energy storage equipment, among which lithium battery energy storage is the mainstream of the industry.

[0003] Energy storage equipment is generally composed of the following modules, including battery modules, monitoring modules, high-voltage control modules, energy storage bidirectional inverters, and fire protection systems. The battery module is the energy storage unit of the entire system. The monitoring module is mainly responsible for collecting and transmitting battery and energy storage inverter data to the data center. The energy storage bidirectional inverter is responsible for converting electrical energy between DC and three-phase electricity. The fire protection system is the last resort to prevent fires after the thermal management of the energy storage battery module fails.

[0004] In the existing technology, within just a few years of the rise of the lithium battery energy storage industry, several fires with relatively wide spread have occurred, which has brought indelible negative impacts to the entire industry and reduced the confidence of both consumers and industry investors. Therefore, developing a more effective and intelligent fire-fighting system has become an important task in the energy storage system.

[0005] As a separate energy storage system, the distributed small energy storage device is small in size, easy to transport, has low power consumption, is easy to install and store, and can be placed outdoors or inside small buildings. Based on cost considerations, the fire protection system of the small energy storage system mostly uses portable HFC-227ea fire extinguishers or temperature-controlled suspended HFC-227ea fire extinguishers and fire-detection tube automatic fire extinguishing devices. The fire extinguishing agent is basically HFC-227ea, and its fire extinguishing principle is a combination of chemical and physical fire extinguishing. It will not cause damage to the ozone layer after discharge, and is currently recognized by the industry. However, since portable fire extinguishers require manual operation, there is no alarm data feedback at the fire scene under unattended conditions, which can easily cause larger accidents, so it is not recommended. For small energy storage systems, temperature-controlled suspended fire extinguishing devices are relatively low in cost and convenient in design, but they will waste a relatively large amount of internal space.

[0006] The fire extinguishing principle of the existing small energy storage system is: there is an automatically triggered fire sprinkler at the bottom of the fire extinguishing device, and its triggering temperature is 68°C and 93°C. The triggering temperature and sensing position are fixed. If the battery thermal failure position is slightly far away from the fire sprinkler, it will not be sensed, which will inevitably lead to further spread of thermal failure and eventually cause a fire.

[0007] The arrangement of the fire detection tube fire extinguishing device is relatively flexible and may surround the lithium battery itself. When the thermal failure temperature of the battery reaches the trigger temperature of the fire detection tube, the fire detection tube near the failure point will rupture, and then the heptafluoropropane agent in the device will be sprayed through the crack to achieve the effect of extinguishing the fire. Compared with the temperature-controlled hanging fire extinguishing device, the flexible fire detection tube can be surrounded by the battery module, and its trigger sensing position is more comprehensive. However, there are also obvious weaknesses, that is, it and the temperature-controlled hanging fire extinguishing device are both physical passive fire extinguishing devices, which require a higher trigger temperature of 140℃~170℃, and cannot be triggered in the early stage of thermal failure. In addition, it is difficult to arrange the fire detection tube in the complex space inside the box.

[0008] Combined with the characteristics of thermal failure and heat diffusion of lithium batteries, after the first open flame is extinguished, the release of flammable gases accompanied by chemical reactions is very likely to cause secondary reignition. Passively triggered fire-fighting equipment cannot cope with the subsequent recurrence crisis after completing one spray. Summary of the invention

[0009] The purpose of the present invention is to provide a battery drawer and a distributed energy storage device thereof that can realize accurate fire extinguishing, which can have the characteristics of high safety, high efficiency and intelligence.

[0010] The embodiment of the present invention is achieved as follows:

[0011] A battery drawer capable of realizing precise fire extinguishing, the battery drawer comprising: a battery drawer body, a transverse moving mechanism, a longitudinal moving mechanism and a mobile fire-fighting assembly, wherein a fire hose adapter is arranged on the first end plate of the battery drawer body, and a plurality of lithium batteries are fixedly mounted on the bottom of the battery drawer body; the transverse moving mechanism is fixedly arranged on the side plate of the battery drawer body; the two ends of the longitudinal moving mechanism are respectively slidably connected with the transverse moving mechanism; the mobile fire-fighting assembly is mounted on the longitudinal moving mechanism, the mobile fire-fighting assembly can slide based on the longitudinal moving mechanism, and the mobile fire-fighting assembly is connected to the fire hose adapter.

[0012] In a preferred embodiment of the present invention, the above-mentioned mobile fire-fighting assembly includes: a fire sprinkler mounting plate, a fire sprinkler and a fire spring tube, the fire sprinkler mounting plate is slidable based on a longitudinal moving mechanism; the fire sprinkler is installed on the fire sprinkler mounting plate; the two ends of the fire spring tube are respectively connected to the fire sprinkler and the fire hose adapter.

[0013] In a preferred embodiment of the present invention, the above-mentioned transverse moving mechanism includes: a first transverse guide rail, a second transverse guide rail and a transverse driving member, the first transverse guide rail is fixedly mounted on the first side panel of the battery drawer body; the second transverse guide rail is fixedly mounted on the second side panel of the battery drawer body; the transverse driving member is mounted on the first transverse guide rail or the second transverse guide rail, and the transverse driving member drives the longitudinal moving mechanism to move transversely.

[0014] In a preferred embodiment of the present invention, the above-mentioned longitudinal moving mechanism includes: a longitudinal guide rail and a longitudinal driving member, wherein the two ends of the longitudinal guide rail are respectively slidably connected to the first transverse guide rail and the second transverse guide rail; the longitudinal driving member is installed on the longitudinal guide rail, and the longitudinal driving member drives the mobile fire extinguisher to move longitudinally.

[0015] In a preferred embodiment of the present invention, the above-mentioned battery drawer body also includes: a smoke sensor and a temperature sensor. The smoke sensor is installed on the inner wall of the battery drawer body to collect smoke information inside the battery drawer body; the temperature sensor is distributed on each lithium battery to collect temperature information of each lithium battery.

[0016] In a preferred embodiment of the present invention, the battery drawer body further comprises: a first pressure relief valve, which is installed on a side wall of the battery drawer body.

[0017] In a preferred embodiment of the present invention, the battery drawer further comprises a battery drawer top cover, and the battery drawer top cover covers the battery drawer box body.

[0018] A distributed energy storage device capable of realizing precise fire extinguishing comprises the above-mentioned battery drawer. The distributed energy storage device also comprises: an energy storage device cabinet, a fixed fire branch, a fixed fire main road and a fire extinguisher. The energy storage device cabinet is provided with a control cabin and a plurality of battery cabins. Each battery cabin is provided with a waterproof joint, which is connected to a fire hose adapter via a fire hose. A fixed fire branch is connected to a waterproof joint. A plurality of fixed fire branches merge into a fixed fire main road. The fire extinguisher is connected to the fixed fire main road.

[0019] In a preferred embodiment of the present invention, the above-mentioned control cabin includes: a fire control system and a backup power supply, the fire control system, smoke information and temperature information are transmitted to the fire control system; the backup power supply is connected to the fire control system.

[0020] In a preferred embodiment of the present invention, the energy storage device cabinet further includes a second pressure relief valve, and the second pressure relief valve is installed on a side wall of the energy storage device cabinet.

[0021] The beneficial effects of the embodiments of the present invention are as follows: a lateral moving mechanism and a longitudinal moving mechanism are arranged above the lithium battery in the battery drawer box of the present invention to help the mobile fire-fighting assembly move, and a mobile precision spraying device is adopted, which can run to the area above the failed battery module to cool down and extinguish the fire according to the temperature monitoring feedback, accurately locate the failure position, and control the failure at an early stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of a distributed energy storage device according to an embodiment of the present invention (front view);

[0024] Figure 2 Schematic diagram of the overall structure of a distributed energy storage device according to an embodiment of the present invention (side view);

[0025] Figure 3 It is a schematic diagram of the top view of the battery drawer after the top cover is hidden in the embodiment of the present invention;

[0026] Figure 4 It is a schematic structural diagram of a mobile fire-fighting assembly of a battery drawer according to an embodiment of the present invention.

[0027] Icons: 100-energy storage equipment cabinet; 110-battery compartment; 111-waterproof connector; 112-second pressure relief valve; 120-control cabin; 121-fire control system; 122-drive controller; 123-battery management system; 124-second smoke sensor;

[0028] 200-Fixed firefighting components; 210-Fixed firefighting branch; 220-Fixed firefighting main; 230-Fire extinguisher; 212-Right-angle stainless steel pipe; 213-Silicone pad; 214-Table type straight-through nut; 211-Branch solenoid valve; 215-Stainless steel pipe bracket; 221-Stainless steel main pipe; 222-Firefighting connecting pipe; 223-Main solenoid valve; 231-Fire extinguisher bracket;

[0029] 300-battery drawer; 310-battery drawer body; 311-first end plate; 312-first side plate; 313-second end plate; 314-second side plate; 315-smoke sensor; 316-first pressure relief valve; 320-lithium battery; 321-temperature sensor; 330-lateral moving mechanism; 331-first lateral guide rail; 332-second lateral guide rail; 333-lateral transmission screw rod; 334-lateral guide rail stepper motor; 340-longitudinal moving mechanism; 341-longitudinal guide rail; 342-longitudinal transmission screw rod; 343-longitudinal guide rail stepper motor; 350-mobile fire-fighting assembly; 351-fire hose adapter; 352-fire sprinkler mounting plate; 353-fire sprinkler; 354-fire spring tube. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] First embodiment

[0037] See also Figure 1 and Figure 2 This embodiment provides a distributed energy storage device that can realize precise fire extinguishing, including an energy storage device cabinet 100 and a fixed fire fighting component 200 connected to the energy storage device cabinet 100, the energy storage device cabinet 100 is used to assemble electrical components such as energy storage battery modules and system control components, and the fixed fire fighting component 200 is used to receive instructions from the system control component to extinguish a certain thermal management failure point in the energy storage device cabinet 100.

[0038] The energy storage device cabinet 100 includes a plurality of battery compartments 110 and a control compartment 120 . The control compartment 120 is located on the top of the battery compartment 110 .

[0039] A waterproof joint 111 is provided on one side wall of the battery compartment 110, and the waterproof joint 111 connects the fire-fighting pipe to the interior of the cabinet to ensure waterproofness. A second pressure relief valve 112 is also provided on the side wall opposite to the waterproof joint 111 to balance the overall internal and external pressures.

[0040] See also Figure 3-4 , a battery drawer 300 is arranged in each battery compartment 110. The battery drawer 300 is a lithium battery installation and fixing device, which includes: a battery drawer box 310, a plurality of lithium batteries 320 arranged at the bottom of the battery drawer box 310; a horizontal moving mechanism 330 located on the upper part of the lithium battery 320 and connected to the battery drawer box 310; a longitudinal moving mechanism 340 installed on the horizontal moving mechanism 330; a mobile fire fighting assembly 350 installed on the longitudinal moving mechanism 340, and a battery drawer 300 top cover covering the battery drawer box 310.

[0041] Specifically, the battery drawer body 310 includes a bottom plate and a first end plate 311 , a first side plate 312 , a second end plate 313 and a second side plate 314 which are sequentially arranged around the bottom plate.

[0042] The lithium battery 320 is mounted on the bottom plate, and multiple lithium batteries 320 are arranged in an orderly and equal spacing. A temperature sensor 321 is also distributed on each lithium battery 320, which is used to collect the temperature information of each lithium battery 320 as one of the parameters for determining whether the thermal management of the lithium battery 320 has failed. A fire hose adapter 351 is provided on the first end plate 311, which is used to connect the waterproof connector 111 on the battery compartment 110 through a fire hose, thereby connecting with the external fixed firefighting assembly 200. The first side plate 312 and the second side plate 314 are used to install the lateral movement mechanism 330. A smoke sensor 315 and a first pressure relief valve 316 are installed on the second end plate 313. The battery management system will collect real-time data on battery voltage and temperature. The smoke sensor 315 is used to activate the smoke alarm device when the battery thermal runaway generates a chemical reaction to generate smoke. In this embodiment, in order to prevent excessive pressure when releasing the fire extinguishing agent in the battery compartment 110, a pressure relief valve is installed on the cabinet and the battery drawer 300 in this embodiment.

[0043] Specifically, the transverse moving mechanism 330 includes: a first transverse guide rail 331, a second transverse guide rail 332 and a transverse driving member, wherein the first transverse guide rail 331 is fixedly mounted on the first side plate 312 of the battery drawer box 310; the second transverse guide rail 332 is fixedly mounted on the second side plate 314 of the battery drawer box 310; the transverse driving member is mounted on the first transverse guide rail 331 or the second transverse guide rail 332, and the transverse driving member drives the longitudinal moving mechanism 340 to move transversely. More specifically, the transverse driving member in this embodiment adopts a transverse transmission screw rod 333 and a transverse guide rail stepping motor 334 for controlling the rotation of the transverse transmission screw rod 333, so that the longitudinal moving mechanism 340 connected to the transverse transmission screw rod 333 moves left and right under the forward and reverse rotation of the transverse transmission screw rod 333. In other embodiments, the longitudinal moving mechanism 340 can also be driven to move left and right by a guide rod, a cylinder or an electric cylinder.

[0044] Specifically, the longitudinal moving mechanism 340 includes a longitudinal guide rail 341 and a longitudinal driving member, wherein the two ends of the longitudinal guide rail 341 are respectively slidably connected to the first transverse guide rail 331 and the second transverse guide rail 332; the longitudinal driving member is installed on the longitudinal guide rail 341, and the longitudinal driving member drives the mobile fire extinguisher to move longitudinally. More specifically, the longitudinal driving member in this embodiment adopts a longitudinal transmission screw 342 and a longitudinal guide rail stepper motor 343 for controlling the rotation of the longitudinal transmission screw 342, so that during the process of the longitudinal guide rail stepper motor 343 controlling the forward and reverse rotation of the longitudinal transmission screw 342, the mobile fire fighting assembly 350 connected to the longitudinal transmission screw 342 can move forward and backward, and the electric guide rail device of the battery drawer 300 can accurately move the fire fighting nozzle to the position of the thermal runaway battery for precise cooling and fire extinguishing. In other embodiments, the mobile fire fighting assembly 350 can also be moved forward and backward by means of guide rods, cylinders or electric cylinders.

[0045] Specifically, the mobile fire-fighting assembly 350 includes: a fire-fighting nozzle mounting plate 352, a fire-fighting nozzle 353 and a fire-fighting spring tube 354. The fire-fighting nozzle mounting plate 352 is mounted on the longitudinal transmission screw 342, and can slide back and forth based on the longitudinal moving mechanism 340; the fire-fighting nozzle 353 is mounted on the fire-fighting nozzle mounting plate 352. More specifically, the fire-fighting nozzle 353 is composed of a fire-fighting nozzle male head and a fire-fighting nozzle female head connected in sequence. The fire-fighting nozzle female head is used to connect the fire-fighting spring tube 354, and the fire-fighting nozzle male head sprays medicine; the other end of the fire-fighting spring tube 354 is connected to the fire hose adapter 351.

[0046] The control cabin 120 is equipped with electrical components such as a controller of a distributed energy storage device, such as a fire control system 121 , a drive component controller 122 and a battery management system 123 . A second smoke sensor 124 is also provided on the top of the control cabin 120 .

[0047] Specifically, the fire control system 121 transmits the collected smoke information and temperature information to the fire control system 121, and then the fire control system 121 determines whether to start the fire extinguishing function. In this embodiment, the fire control system 121 is also equipped with direct current, mains power, and backup power. The three power supplies jointly supply power to the fire control system 121 to avoid power failure of a single power supply when a fire occurs. The battery management system 123 of the distributed energy storage device, the smoke sensor 315, the fire control system 121, the stepper motor controller, the heptafluoropropane solenoid valve on the fire bottle, the branch solenoid valve on the fire pipe, and the electric guide device in the battery drawer 300 realize the automatic collection, automatic transmission, and intelligent control of the fire situation.

[0048] Specifically, the drive controller 122 is used to receive signals from the fire control system 121, control the movement of the stepper motor in the battery drawer, and control the rotation of the horizontal / vertical guide stepper motor, so that the mobile fire fighting assembly 350 inside the battery compartment 110 moves above the lithium battery 320 to achieve precise fire extinguishing.

[0049] Specifically, the battery management system 123 detects the electrical properties and temperature of the lithium battery 320 in the system.

[0050] The fixed firefighting assembly 200 includes: a fixed firefighting branch line 210 , a fixed firefighting main line 220 and a fire extinguisher 230 .

[0051] Specifically, a fixed fire branch 210 is connected to a waterproof joint 111. In this embodiment, the fixed fire branch 210 includes a right-angle stainless steel pipe 212, a silicone pad 213, a surface-type straight-through nut 214, a branch electromagnetic valve 211, and a stainless steel pipe bracket 215, which are connected in sequence. The right-angle stainless steel pipe 212: realizes the right-angle turn of the stainless steel pipe; the silicone pad 213: seals the middle of the pipeline; the surface-type straight-through nut 214: connects the two ends of the branch electromagnetic valve 211, plays a role of switching; the branch electromagnetic valve 211: controls the on-off of the branch heptafluoropropane pipeline; the stainless steel pipe bracket: fixes the stainless steel pipe.

[0052] Specifically, a plurality of fixed fire branches 210 merge into a fixed fire main road 220, and the fixed fire main road 220 includes a stainless steel main pipe 221, a fire connection pipe 222, and a fire extinguisher 230 connected in sequence. The stainless steel main pipe 221 divides the heptafluoropropane channel into four channels, and the fire connection pipe 222 connects the heptafluoropropane fire extinguishing device with the fire pipe. A fire extinguisher bracket 231 is provided at the position of the fire extinguisher 230 in this embodiment, and the fire extinguisher 230 is fixed to the outer wall of the energy storage device cabinet 100; the fire extinguisher 230 in this embodiment adopts a heptafluoropropane fire extinguisher 230, and a main road solenoid valve 223 is configured on the fire extinguisher 230. The solenoid valve is used to facilitate the control of the fire control system 121, and the fire valve that can be repeatedly opened and closed can effectively deal with the initial thermal runaway and the subsequent possible re-ignition of the fire.

[0053] More specifically, the entire fire protection system includes a fixed fire protection component 200 and a mobile fire protection component 350. The fire extinguisher 230 has an adapter, which is connected to the fire protection connecting pipe 222 through a thread, and a silicone pad 213 is installed in the middle. The stainless steel main pipe 221 is connected to the fire protection connecting pipe 222 through a thread, and a silicone pad 213 is installed in the middle. The two ends of the branch solenoid valve 211 are connected to the surface type straight-through nut 214, and the thread periphery is coated with liquid raw tape. Then, the two ends of the component are respectively connected to the stainless steel main pipe 221 with a right-angle stainless steel pipe 212, and a silicone pad 213 is installed in the middle; the stainless steel pipe bracket will The fire main is fixed on the side of the energy storage cabinet, and the fire hose is connected to the right-angle stainless steel tube 212 and the fire spring tube adapter of the battery drawer 300, with a silicone pad 213 installed in the middle. One end of the fire spring tube 354 is connected to the fire spring tube adapter plus liquid raw tape, and the other end of the fire female head is directly installed on the upper end of the fire male head; the fire male head is connected to the fire sprinkler 353 through a thread, and the fire sprinkler 353 is connected to the longitudinal guide rail 341 through bolts. The longitudinal guide rail 341 is installed on the upper end of the transverse guide rail slider through bolts, and the transverse guide rail is installed on the battery drawer 300 through bolts.

[0054] The method of using the distributed energy storage device in this embodiment is as follows:

[0055] In the battery drawer 300, the smoke sensor 315 and the temperature sensor 321 distributed on the battery module are used as fire detection. The battery management system 123 (BMS) collects the temperature of the lithium battery 320 in real time. When the temperature of the lithium battery 320 reaches a threshold value preset by the battery management system 123 (the threshold value is obtained based on the analysis of the battery thermal runaway characteristics and is greater than the maximum temperature value T1 allowed for the battery), the battery management system 123 transmits a signal to the fire control system 121 (Fire Control System 121, Fire Control System 121). System), the fire control system 121 will open the main electromagnetic valve 223 of the HFC-227ea fire extinguisher 230 and the branch electromagnetic valve 211 of the corresponding battery drawer 300 according to the feedback of the battery problem of thermal failure, and the stepper motor controller controls the horizontal and vertical guide rails 341 to move the fire sprinkler 353 to the temperature out of control area, and the agent passes through the HFC-227ea solenoid valve in turn through the fire connecting pipe 222, the fire main pipe, the surface type straight nut 214 and the branch electromagnetic valve 211 of the corresponding battery drawer 300, the surface type straight nut 214 and the fire hose into the battery drawer 300, and then is transported to the fire nozzle through the fire spring tube 354 for precise fire extinguishing.

[0056] The amount of medicine sprayed during use is related to the heat energy released by battery combustion and the fire extinguishing concentration of the medicine. The value varies from battery to battery. Actual tests are performed based on experiments to obtain different amounts of medicine used for different lithium batteries 320.

[0057] The smoke sensor 315 serves as a backup channel for fire detection. When the battery thermal runaway generates smoke, it starts working and transmits signals to the fire control system 121. The fire control system 121 then determines the out-of-control location and starts to extinguish the fire. The fire control system 121 contains a backup power supply and a control board, which can power the solenoid valve, stepper motor controller and stepper motor when the battery thermal runaway occurs.

[0058] An electric guide rail is provided inside the battery drawer 300. When the fire control system 121 opens the medicine bottle, it synchronously gives a signal to the stepper motor controller. The stepper motor controller controls each stepper motor to move the nozzle to the area directly above the out-of-control battery for precise cooling and fire extinguishing.

[0059] After spraying the predetermined agent, the branch battery valve will close again. If thermal failure occurs again, the fire-fighting device will start again for secondary cooling and fire extinguishing. Therefore, the agent should be enough to extinguish the fire for at least 2 times.

[0060] Since the entire fire protection system is powered by electricity, in order to prevent power supply interruption, the fire protection system includes three sets of power supplies, one is the direct current provided by the system battery pack, the second is the alternating current provided by the power grid, and the third is the backup power supply in the fire protection control system 121. The three parallel power supplies provide energy guarantee for the safety and reliability of the fire protection system.

[0061] In summary, the advantages of the present invention are as follows: 1. It contains dual detection devices of temperature and smoke to determine the thermal runaway state of the battery and reduce the risk of electronic signal transmission failure and misjudgment. 2. The fire control center sets the threshold according to the battery characteristics, opens and closes the solenoid valve of the fire extinguisher 230 device according to the specific situation of the thermal failure, and effectively controls the battery re-ignition. 3. The mobile precision spray device inside the battery drawer 300 can run to the area above the failed battery module to cool down and extinguish the fire according to the temperature monitoring feedback, accurately locate the failure position, and control the failure at an early stage. 4. The fire extinguishing device is powered by multiple power supplies in parallel to avoid the situation where the device lacks power and does not work.

[0062] This specification describes examples of embodiments of the present invention, and it is not intended that these embodiments illustrate and describe all possible forms of the present invention. It should be understood that the embodiments in the specification can be implemented in a variety of alternative forms. The drawings need not be drawn to scale; some features can be enlarged or reduced to show the details of specific components. The specific structural and functional details disclosed should not be interpreted as limiting, but are merely representative bases for teaching those skilled in the art to implement the present invention in various forms. It should be understood by those skilled in the art that the multiple features illustrated and described with reference to any of the figures can be combined with the features illustrated in one or more other figures to form embodiments that are not explicitly illustrated or described. The illustrated combined features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the present invention can be used for specific applications or implementations as needed.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the main electromagnetic valve 223 may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the main electromagnetic valve 223 shall be included in the protection scope of the main electromagnetic valve 223.

Claims

1. A battery drawer capable of achieving precise fire extinguishing, characterized in that: The battery drawer comprises: A battery drawer box, wherein a fire hose adapter is provided on a first end plate of the battery drawer box, a plurality of lithium batteries are fixedly installed at the bottom of the battery drawer box, and each of the lithium batteries is provided with a temperature sensor; A lateral movement mechanism, fixedly arranged on the side plate of the battery drawer box; A longitudinal moving mechanism, both ends of which are slidably connected to the transverse moving mechanism; A mobile firefighting assembly, mounted on the longitudinal moving mechanism and located above the lithium battery, the mobile firefighting assembly being connected to the fire hose adapter; The lateral movement mechanism comprises: A first transverse guide rail, fixedly mounted on a first side plate of the battery drawer body; A second transverse guide rail, fixedly mounted on a second side plate of the battery drawer body; A transverse driving member, mounted on the first transverse guide rail or the second transverse guide rail, wherein the transverse driving member drives the longitudinal moving mechanism to move transversely; The longitudinal movement mechanism: A longitudinal guide rail, two ends of which are slidably connected to the first transverse guide rail and the second transverse guide rail; A longitudinal driving member, mounted on the longitudinal guide rail, the longitudinal driving member drives the mobile fire-fighting assembly to move longitudinally; The mobile firefighting kit includes: A fire sprinkler head mounting plate, slidable based on the longitudinal moving mechanism; A fire sprinkler head is mounted on the fire sprinkler head mounting plate; The fire-fighting spring tube has two ends respectively connected to the fire-fighting nozzle and the fire-fighting hose adapter.

2. The battery drawer capable of realizing precise fire extinguishing according to claim 1, characterized in that: The battery drawer box also includes: The smoke sensor is installed on the inner wall of the battery drawer body and is used to collect smoke information inside the battery drawer body.

3. The battery drawer capable of realizing precise fire extinguishing according to claim 1, characterized in that: The battery drawer box also includes: The first pressure relief valve is installed on the side wall of the battery drawer body.

4. The battery drawer capable of realizing precise fire extinguishing according to claim 1, characterized in that: The battery drawer further comprises a battery drawer top cover, and the battery drawer top cover covers the battery drawer box body.

5. A distributed energy storage device capable of realizing precise fire extinguishing, comprising the battery drawer according to any one of claims 1 to 4, characterized in that: The distributed energy storage device also includes: The energy storage device cabinet is provided with a control cabin and a plurality of battery cabins, each of the battery cabins is provided with a waterproof joint, which is connected to the fire hose adapter through a fire hose; A fixed fire-fighting branch line, one of the fixed fire-fighting branches is connected to one of the waterproof joints; A fixed fire main road, into which a plurality of fixed fire branch roads merge; A fire extinguisher is connected to the fixed fire fighting main road.

6. The distributed energy storage device capable of realizing precise fire extinguishing according to claim 5, characterized in that: The control cabin comprises: A fire control system, to which the collected real-time smoke information and temperature information are transmitted, and the fire control system adaptively selects the amount and number of times of fire extinguisher agent injection according to the battery type and the battery thermal runaway state; A backup power supply is connected to the fire control system.

7. The distributed energy storage device capable of realizing precise fire extinguishing according to claim 6, characterized in that: The energy storage device cabinet further includes a second pressure relief valve, which is installed on a side wall of the energy storage device cabinet.

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