Electric energy storage safety protection system

Abstract

The utility model provides an electric energy storage safety protection system. The electric energy storage safety protection system comprises a detection host, a plurality of change-over valves and a plurality of air return adjusting valves, the change-over valve is arranged on an air outlet path between the battery pack and the detection host and is configured to be switched between a detection operation configuration and a fire-fighting operation configuration, namely, the change-over valve realizes the switching between an air outlet function and a fire-fighting medium injection function, but the change-over valve cannot adjust the air outlet flow; furthermore, a return air regulating valve is arranged on the return air path between the detection host and the battery pack, and the return air flow conveyed back to the battery pack from the detection host is regulated to control the air outlet flow output by the battery pack through the change-over valve, so that the air outlet flows of the battery packs with different distances from the detection host are regulated to be basically consistent; the problem that an existing electric energy storage safety protection system is low in detection accuracy due to the fact that the air outlet flow of each battery pack is different is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric energy storage safety protection systems, and particularly relates to an electric energy storage safety protection system. Background Art

[0002] With the increasing depletion of traditional energy sources, it has greatly promoted the development of new energy sources, and the installed capacity has also increased rapidly. New energy power generation such as wind energy and solar energy depends on natural conditions, has the characteristics of volatility and intermittency, and is difficult to regulate and control. Large-scale grid connection operation will have a significant impact on the safe and stable operation of the power grid. Energy storage technology can greatly solve the problems of randomness and volatility of new energy power generation and improve the utilization rate of renewable clean energy. The large-scale installation of new energy has given rise to the rapid development of large-scale energy storage systems.

[0003] At present, the large-scale battery energy storage technology is the fastest developing in large-scale energy storage technologies. Its characteristics are that the power and energy can be flexibly configured according to different application needs, it has a fast response speed, and is suitable for large-scale applications and mass production. In recent years, with the requirements of actual needs, large-scale battery energy storage power stations have begun to be built and operated in large quantities. Battery energy storage has many advantages, but the battery is a device containing high-energy substances, has certain potential safety hazards, and there is a probability of dangerous accidents. With the expansion of the scale of the battery energy storage system, the probability of dangerous accidents will be greatly increased. Usually, under the dual action of external electrical and thermal stimuli and its own aging, the energy storage battery may undergo a thermal runaway reaction, releasing a large amount of high-temperature combustible gas mixture. When it encounters oxygen and electric sparks in the external air, it is extremely likely to explode.

[0004] The existing energy storage power stations are composed of individual battery cabinets arranged as basic units in containers. Since the containers are usually of standard size, in order to increase the battery capacity in the container as much as possible and save costs, it is necessary to reduce the volume and cost of each battery cabinet as much as possible. Usually, a battery cabinet will include a cabinet body and several battery packs stacked in the cabinet body, and each battery pack has the possibility of thermal runaway and other situations.

[0005] The existing safety protection solutions usually set multi-in-one composite detectors on each battery pack in the cabinet body, and then the temperature and escaped gas in the battery pack can be detected respectively. If an abnormality is detected, the fire extinguishing procedure will be executed to inject the fire extinguishing agent into the corresponding battery pack through the pipeline for suppression and extinguishment. However, this solution will cause the problem of too high cost because each battery pack needs to be equipped with a detector.

[0006] Another existing safety protection solution is to lead out the gas in each battery pack for detection and then return it to the battery pack to form a gas cycle. However, in this method, due to the different distances between each battery pack and the detection host, the different lengths of the connecting pipelines will result in a large gas outlet flow rate for the battery packs close to the host and a small gas outlet flow rate for the battery packs far from the detection host. In extreme cases, the gas in the remote battery packs cannot be detected at all, leading to low detection accuracy. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an electrical energy storage safety protection system to solve the problem of low detection accuracy of the existing electrical energy storage safety protection system due to different gas outlet flow rates of each battery pack.

[0008] To solve the above problems, the technical solution of the present invention is as follows:

[0009] An electrical energy storage safety protection system of the present invention is used to detect one or more groups of battery cluster modules. Each battery cluster module includes a plurality of battery packs and comprises:

[0010] A detection host configured to detect the received mixed gas;

[0011] A plurality of switching valves, corresponding to the battery packs one by one. The switching valve includes a first gas flow end, a second gas flow end, and a fire-fighting medium output end. The switching valve is configured to switch between a detection operation configuration in which the first gas flow end and the second gas flow end are connected and a fire-fighting operation configuration in which the second gas flow end and the fire-fighting medium output end are connected; the first gas flow end and the fire-fighting medium output end of each switching valve are connected to the corresponding battery pack, and the second gas flow end of each switching valve is respectively connected to the input end of the detection host through a pipeline;

[0012] A plurality of gas return regulating valves, corresponding to the battery packs one by one. The gas return regulating valve includes a connected third gas flow end and a fourth gas flow end. The third gas flow end is connected to the output end of the detection host through a pipeline, and the fourth gas flow end is connected to the corresponding battery pack; the gas return regulating valve is configured to adjust the gas return flow rate of the gas return channel formed between the third gas flow end and the fourth gas flow end to control the gas outlet flow rate output by the battery pack via the switching valve.

[0013] For the electrical energy storage safety protection system of the present invention, the gas return regulating valve includes a regulating valve housing, a regulating valve spool, a three-way quick connector, and a shaft core bracket;

[0014] Both ends of the regulating valve housing are respectively provided with the third air flow end, the fourth air flow end and the air return channel. The regulating valve spool is arranged in the air return channel. The shaft core support penetrates through the regulating valve housing and is connected to the driving end of the regulating valve spool. The shaft core support is configured to drive the regulating valve spool to rotate to adjust the air return flow rate of the air return channel.

[0015] The three-way quick connector includes a valve body air return interface, a first main air return interface and a second main air return interface. The valve body air return interface is connected to the third air flow end, and the first main air return interface and the second main air return interface are connected to the air return main pipeline of the detection host.

[0016] In the electric energy storage safety protection system of the present utility model, the third air flow end and the fourth air flow end are respectively an adjustment opening and an output opening on the regulating valve housing. The adjustment opening, the output opening and the air return channel are coaxial. The regulating valve housing is further provided with an adjustment channel perpendicular to the air return channel, and the shaft core support is installed in the adjustment channel.

[0017] In the electric energy storage safety protection system of the present utility model, the regulating valve spool includes a ball core and two regulating valve seals arranged on both sides of the ball core along the axis of the air return channel. A step surface for abutting against the regulating valve seal close to the fourth air flow end is provided in the air return channel.

[0018] The valve body air return interface is provided with an external thread, and the third air flow end is provided with an internal thread. The valve body air return interface is connected to the internal thread through the external thread, and the end face of the valve body air return interface abuts against the regulating valve seal close to the third air flow end.

[0019] In the electric energy storage safety protection system of the present utility model, a plurality of scale marks corresponding to the shaft core support are provided on the outer side wall of the regulating valve housing.

[0020] In the electric energy storage safety protection system of the present utility model, the switching valve includes a switching valve body and a switching valve spool.

[0021] The switching valve body is provided with a mounting surface for mounting to the battery pack. An inclined valve core cavity is provided in the switching valve body. The switching valve body is provided with an input channel and an output channel communicating with both ends of the valve core cavity. The height of the input channel is higher than that of the output channel, and the input channel penetrates through to the mounting surface.

[0022] One end of the valve core cavity communicating with the input channel is an input connection port, one end of the valve core cavity communicating with the output channel is an output connection port, a valve core sliding channel communicating with the input connection port and the output connection port is provided in the valve core cavity, and a gas communication channel communicating with the input connection port and the output connection port is provided in the valve core cavity; wherein, an opening maintaining structure is provided in the output connection port and / or the valve core sliding channel;

[0023] The conversion valve body is provided with an atomization channel, the input end of the atomization channel is communicated with the valve core cavity, and the atomization channel is configured to have a preset opening pressure;

[0024] The conversion valve core is slidably connected to the valve core sliding channel, and the conversion valve core is configured to be switched between a detection operation configuration and a fire protection operation configuration;

[0025] In the detection operation configuration, the conversion valve core freely falls under the action of gravity and is limited by the opening maintaining structure to be spaced from the output connection port, the input channel and the output channel remain communicated, and the pressure in the valve core cavity is less than the preset opening pressure;

[0026] In the fire protection operation configuration, the conversion valve core rises under the action of the fire protection medium input from the output channel to overcome gravity and closes the input connection port, and the pressure of the fire protection medium in the valve core cavity overcomes the preset opening pressure and is atomized and output by the atomization channel.

[0027] For the electric energy storage safety protection system of the present utility model, the conversion valve body includes a main body shell and a rear cover bracket;

[0028] The main body shell includes a connected horizontal main body section and an inclined main body section, the input channel and the atomization channel are provided in the horizontal main body section, and the valve core cavity is provided in the inclined main body section;

[0029] The rear cover bracket is connected to the main body shell, and the output channel is provided in the rear cover bracket.

[0030] For the electric energy storage safety protection system of the present utility model, a slide rail member for extending into the valve core cavity is provided on the rear cover bracket, the slide rail member includes an abutting ring and a plurality of slide rail bodies spaced around the axis of the valve core sliding channel, the first ends of the slide rail bodies are respectively connected to the rear cover bracket, the second ends of the slide rail bodies are respectively connected to the abutting ring, and the abutting ring is configured to abut against the input connection port.

[0031] The electrical energy storage safety protection system of the present utility model further includes a first sealing portion. The first sealing portion is disposed between the abutting ring and the input connection port, and a through hole communicating the input channel and the gas communication channel is provided on the first sealing portion. The through hole is configured to be abutted and cut off the input channel and the gas communication channel by the valve core.

[0032] In the electrical energy storage safety protection system of the present utility model, the conversion valve core is a spherical valve core, and the gravity of the spherical valve core is less than the buoyancy generated by it in the fire extinguishing medium.

[0033] Due to the adoption of the above technical solutions, the present utility model has the following advantages and positive effects compared with the prior art:

[0034] In an embodiment of the present utility model, the electrical energy storage safety protection system is configured to include a detection host, a plurality of conversion valves, and a plurality of return air regulating valves; the conversion valves and the return air regulating valves respectively correspond to the battery packs one by one. The conversion valves are disposed on the air outlet air path between the battery packs and the detection host, and the conversion valves are configured to convert between the detection operation configuration and the fire fighting operation configuration, that is, to realize the conversion of the air outlet function and the fire extinguishing medium injection function. However, the conversion valves cannot adjust the size of the air outlet flow rate. Therefore, a return air regulating valve is further disposed on the return air path between the detection host and the battery packs to adjust the size of the return air flow rate conveyed from the detection host back to the battery packs, so as to control the air outlet flow rate output by the battery packs via the conversion valves, thereby adjusting the air outlet flow rates between the battery packs at different distances from the detection host to be basically the same, and further ensuring the detection accuracy of the detection host, and solving the problem of low detection accuracy of the existing electrical energy storage safety protection system due to different air outlet flow rates of each battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is an overall schematic diagram of the electrical energy storage safety protection system of the present invention;

[0036] Figure 2 is an exploded view of the return air regulating valve of the electrical energy storage safety protection system of the present invention;

[0037] Figure 3 is a cross-sectional view of the return air regulating valve of the electrical energy storage safety protection system of the present invention.

[0038] Figure 4 is an exploded view of the conversion valve of the electrical energy storage safety protection system of the present invention;

[0039] Figure 5 is a schematic diagram of the conversion valve of the electrical energy storage safety protection system of the present invention in the detection operation configuration;

[0040] Figure 6Schematic diagram of the conversion valve of the electrical energy storage safety protection system of the present invention in the fire operation configuration.

[0041] Description of reference numerals: 1, main body housing; 101, input channel; 102, valve core cavity; 2, first sealing ring; 3, first sealing gasket; 4, spherical valve core; 5, connection sealing part; 6, rear cover bracket; 601, output channel; 7, bolt; 8, quick connector; 9, atomizing nozzle; 10, slide rail body; 11, abutting ring; 12, regulating valve housing; 13, regulating valve seal; 14, regulating valve ball core; 15, tee quick connection; 16, shaft core bracket. Detailed implementation manners

[0042] The following further describes in detail a kind of electrical energy storage safety protection system proposed by the present utility model in conjunction with the accompanying drawings and specific embodiments. According to the following description and claims, the advantages and features of the present utility model will be clearer.

[0043] Refer to Figures 1 to 6 , an electrical energy storage safety protection system for detecting one or more battery cluster modules, each battery cluster module includes a plurality of battery packs, and includes a detection host, a plurality of conversion valves and a plurality of return air regulating valves.

[0044] The detection host is configured to detect the received mixed gas.

[0045] A plurality of conversion valves correspond to the battery packs one by one. The conversion valve includes a first air flow end, a second air flow end and a fire protection medium output end. The conversion valve is configured to switch between a detection operation configuration in which the first air flow end and the second air flow end are connected and a fire protection operation configuration in which the second air flow end and the fire protection medium output end are connected. The first air flow end and the fire protection medium output end of each conversion valve are connected to the corresponding battery pack, and the second air flow end of each conversion valve is respectively connected to the input end of the detection host through a pipeline (the second air flow end is also connected to an external fire protection medium supply end), that is, the detection host receives the gases output by each conversion valve for aggregation and inhalation detection.

[0046] A plurality of return air regulating valves correspond to the battery packs one by one. The return air regulating valve includes a connected third air flow end and a fourth air flow end. The third air flow end is connected to the output end of the detection host through a pipeline, and the fourth air flow end is connected to the corresponding battery pack. The return air regulating valve is configured to regulate the return air flow rate of the return air channel formed between the third air flow end and the fourth air flow end to control the air output flow rate of the battery pack output through the conversion valve.

[0047] In this embodiment, the electrical energy storage safety protection system is set to include a detection host, a number of switching valves, and a number of return air regulating valves; the switching valves and the return air regulating valves correspond to the battery packs one by one. The switching valve is arranged on the air outlet air path between the battery pack and the detection host, and the switching valve is configured to switch between the detection operation configuration and the fire protection operation configuration, that is, to realize the conversion between the air outlet function and the fire protection medium injection function. However, the switching valve cannot adjust the size of the air outlet flow rate. Therefore, a return air regulating valve is further arranged on the return air path between the detection host and the battery pack to adjust the size of the return air flow rate transported from the detection host back to the battery pack, so as to control the air outlet flow rate output by the battery pack via the switching valve, thereby adjusting the air outlet flow rates between the battery packs at different distances from the detection host to be basically the same, and further ensuring the detection accuracy of the detection host, and solving the problem of low detection accuracy of the existing electrical energy storage safety protection system due to different air outlet flow rates of each battery pack.

[0048] That is, in this embodiment, the opening degree of the corresponding return air regulating valve can be adjusted according to each battery pack and the pipeline length between the switching valve and the detection host, so that the flow rates output from each battery pack to the detection host are balanced, and further improve the detection accuracy of the detection host.

[0049] The specific structure of the electrical energy storage safety protection system of this embodiment will be further described below:

[0050] It is set that the second air flow section of each switching valve is output through the intake sub-pipeline, and the output ends of the respective intake sub-pipelines are connected to the intake main pipeline (the gases output by each switching valve are aggregated here), and the output end of this intake main pipeline is connected to the gas input end of the detection host, so that the aggregated gases are detected and warned in the detection host.

[0051] Each detection host can be correspondingly provided with one or more groups of battery cluster modules, and each battery cluster module is composed of multiple battery packs. In order to be able to implement the gas monitoring function for all battery packs in the same cluster, first of all, it is necessary to ensure that gas can flow into each battery pack and be detected by the detection host. Since factors such as the length and inner diameter of the air pipe will affect the air flow of each box body, if the ventilation holes of multiple battery packs are the same, the air flow of the battery pack in the lower position will be smaller, or even there will be no air flow. Therefore, in order to ensure that the gas flow in each box body is the same, it is necessary to adaptively adjust the size of the ventilation hole diameter of each box body (that is, the size of the gas flow area opened by the return air regulating valve), so as to achieve the balance of the air flow in each battery pack.

[0052] The specific structure of the return air regulating valve of this embodiment will be further described below:

[0053] In this embodiment, in order to minimize the occupied volume as much as possible, the gas return regulating valve can adopt a manually adjustable valve. Specifically, the valve can include a regulating valve housing 12, a regulating valve spool, a three-way quick connector 15, and a shaft core bracket 16. An installation space for installing the regulating valve spool is provided inside the regulating valve housing 12. The regulating valve housing 12 is provided with a regulating channel, a regulating opening, and an output opening communicating with the installation space. The regulating opening and the output opening are coaxial, the regulating channel is vertically arranged, and the surface of the regulating valve housing 12 provided with the output opening is mounted on the battery pack. At least part of the regulating valve spool is installed in the installation space, and the shaft core bracket 16 penetrates through the regulating channel and is connected to the regulating valve spool to control the opening degree of the regulating valve spool; the three ports of the three-way quick connector 15 are respectively two air pipe ports and one spool port. The end face of the regulating valve housing 12 provided with the regulating opening is provided with an internal thread, and the internal thread surrounds the regulating valve spool. The spool port of the three-way quick connector 15 can be provided with an external thread, and the connection with the regulating valve housing 12 is realized through the cooperation of the external thread and the internal thread. The two air pipe ports are respectively connected to the family-level output air pipe (i.e., the total output air pipe) of the detection host and the battery pack. By rotating the regulating valve spool, the air flow rate output from the family-level output air pipe to the corresponding battery pack through the regulating opening, the regulating valve spool, and the output opening can be adjusted.

[0054] Further, the regulating valve spool can specifically be a ball core. And to ensure the sealing performance, two regulating valve seals 13 (specifically, Teflon gaskets) can be arranged on the left and right sides of the ball core to clamp the ball core and cooperate with the end of the external thread of the three-way quick connector 15 for pressing and sealing.

[0055] Further, a plurality of scale marks can be arranged on the outer side wall surface of the regulating valve housing 12 corresponding to the regulating channel, specifically, 15 to 20 gears can be set to indicate the opening degree and match the number of battery packs that a single detection host needs to connect.

[0056] See Figure 2 and Figure 3 , the specific structure of the switching valve in this embodiment will be further described below:

[0057] The switching valve is used for the electro-chemical energy storage safety protection system and includes a switching valve body and a switching valve spool.

[0058] The switching valve body is provided with an installation surface for mounting on the battery pack. An inclined valve core cavity 102 is provided inside the switching valve body. The switching valve body is provided with an input channel 101 (i.e., the above-mentioned first air flow end) and an output channel 601 (i.e., the above-mentioned second air flow end) communicating with both ends of the valve core cavity 102. The height of the input channel 101 is higher than that of the output channel 601, and the input channel 101 penetrates through to the installation surface.

[0059] Among them, one end of the spool chamber 102 communicating with the input channel 101 is the input connection port, and one end of the spool chamber 102 communicating with the output channel 601 is the output connection port. A spool sliding channel communicating the input connection port and the output connection port is provided in the spool chamber 102, and a gas communication channel communicating the input connection port and the output connection port is provided in the spool chamber 102 (the gas communication channel and the spool sliding channel can be independent of each other, or partially included or fully included. The input channel 101, the gas communication channel and the output channel 601 cooperate to form an air flow channel). Among them, an opening and maintaining structure is provided in the output connection port and / or the sliding channel.

[0060] In addition, an atomization channel (i.e., the above-mentioned fire-fighting medium output end) is also provided in the conversion valve body. The input end of the atomization channel communicates with the spool chamber 102, and the output end is used to communicate with the battery pack. The atomization channel is configured to have a preset opening pressure (the output channel 601, the spool chamber 102 and the atomization channel form a fire-fighting medium channel), and the preset opening pressure is not less than 0.3MP.

[0061] The conversion valve spool is slidably connected to the spool sliding channel (the spool sliding channel is the area covered by the sliding track of the conversion valve spool, and is also inclined), and the conversion valve spool is configured to be switched between the detection operation configuration and the fire-fighting operation configuration. In the detection operation configuration, the conversion valve spool freely falls under the action of gravity and is limited by the opening and maintaining structure to be spaced from the output connection port (that is, the opening and maintaining structure is used to prevent the conversion valve spool from fitting to the output connection port, resulting in the air flow channel being cut off at this place). The input channel 101 and the output channel 601 remain connected, and the pressure in the spool chamber 102 is less than the preset opening pressure. In the fire-fighting operation configuration, the conversion valve spool rises under the action of the fire-fighting medium input from the output channel 601 to overcome gravity and closes the input connection port, and the fire-fighting medium overcomes the preset opening pressure in the spool chamber 102 and is atomized and output through the atomization channel.

[0062] In this embodiment, an input channel 101, a spool cavity 102, and an output channel 601 are sequentially arranged in the conversion valve body. The spool cavity 102 is arranged obliquely with the input channel 101 higher than the output channel 601. The spool cavity 102 is provided with an input connection port, an output connection port, a spool sliding channel, a gas communication channel, and an opening maintaining structure. Further, an atomization channel with a preset opening pressure and communicating with the spool cavity 102 is provided. The conversion valve spool slides in the spool sliding channel and is configured to have a detection operation configuration and a fire protection operation configuration. In the detection operation configuration, the conversion valve spool freely falls under the action of gravity and is limited by the opening maintaining structure to be spaced from the output connection port, and the input channel 101 and the output channel 601 remain in communication. In the fire protection operation configuration, the conversion valve spool rises under the action of the fire protection medium input from the output channel 601 to overcome gravity and closes the input connection port (the air flow channel is cut off), and the fire protection medium pressure increases in the spool cavity 102 and overcomes the preset opening pressure to be atomized and output through the atomization channel. Furthermore, the conversion between the gas path and the fire protection medium path without an additional power device can be realized. Compared with the existing ball valve solution, the volume is greatly reduced, and the cost is also reduced, thus solving the problems of large volume and high cost of the battery cabinet caused by the existing electric energy storage safety protection solution.

[0063] See Figures 4 to 6 , the specific structure of the conversion valve in this embodiment will be further described below:

[0064] In this embodiment, for the convenience of assembly, the conversion valve body may specifically include a main body housing 1 and a rear cover bracket 6, which are detachably connected. The main body housing 1 includes a connected horizontal main body section and an inclined main body section. The input channel 101 and the atomization channel are arranged in the horizontal main body section, and the spool cavity 102 is arranged in the inclined main body section. The input channel 101 and the atomization channel may be specifically arranged horizontally, and the spool cavity 102 may also be arranged obliquely (as long as the spool sliding channel is inclined). The rear cover bracket 6 is connected to the main body housing 1, and the output channel 601 is arranged in the rear cover bracket 6.

[0065] Specifically, the plane where the axis of the input channel 101 and the axis of the valve core cavity 102 are located is the first plane, and the output channel 601 is perpendicular to the first plane. The purpose of setting the output channel 601 to be perpendicular to the input channel 101 and the valve core cavity 102 is to allow the input channel 101 to extend outward along the side surface of the main body housing 1, making more use of the lateral space, thereby reducing the overall length of the switching valve body. That is, the rear cover bracket 6 can be specifically set as an L-shaped structure, and the output channel 601 can also be set as an L-shaped, including a guiding channel section and a connecting channel section. The guiding channel section is used to connect the valve core cavity 102, and the length of the guiding channel section can be set to be close to the diameter of the connecting channel section, that is, to reduce the length of the guiding channel section as much as possible to reduce the overall length of the switching valve body. A quick connector 8 can be further provided at the connecting channel section to connect to an external pipeline.

[0066] Furthermore, the main body housing 1 and the rear cover bracket 6 can be fixed by bolts 7, or can also be connected by a threaded manner. A connection sealing portion 5 can be provided at the connection between the main body housing 1 and the rear cover bracket 6. The connection sealing portion 5 can be an O-ring seal to avoid the problem of poor sealing caused by dimensional deviation when the main body housing 1 and the rear cover bracket 6 are connected. Of course, in other embodiments, if the dimensional deviation of the rear cover bracket 6 meets the requirements, the connection sealing portion 5 may not be provided.

[0067] In this embodiment, for the convenience of assembly, a sliding rail member for extending into the valve core cavity 102 is provided on the mounting surface of the rear cover bracket 6 facing the main body housing 1, that is, the sliding rail member forms the above-mentioned valve core sliding channel in the valve core cavity 102. The sliding rail member can specifically include an abutting ring 11 and a plurality of sliding rail bodies 10 spaced apart around the axis of the valve core sliding channel. The first ends of the sliding rail bodies 10 are respectively connected to the rear cover bracket 6, and the second ends of the sliding rail bodies 10 are respectively connected to the abutting ring 11. The abutting ring 11 is configured to abut against the input connection port, that is, there is a space between the abutting ring 11 and the rear cover bracket 6 along the axis direction of the valve core sliding channel. The two ends of the sliding rail body 10 are respectively connected to the abutting ring 11 and the rear cover bracket 6. The number of the sliding rail bodies 10 can specifically be three or more. The surface of the sliding rail body 10 facing the axis is used to limit the sliding trajectory of the switching valve core.

[0068] In this embodiment, the above-mentioned opening maintaining structure can specifically be a protruding structure provided at the first end of the sliding rail body 10. The protruding direction of the protruding structure is towards the axis of the core sliding channel, so that the diameter of the valve core sliding channel near the rear cover bracket 6 is reduced, thereby preventing the switching valve core from further sliding towards the rear cover bracket 6. Among them, the protruding structure can actually be a rectangular protrusion or an arc protrusion.

[0069] In this embodiment, in order to improve the sealing performance of the conversion valve spool to cut off the air flow channel in the fire-fighting operation configuration, the conversion valve may further include a first sealing portion, which is disposed between the abutting ring 11 and the input connection port, and may be specifically fixed at the input connection port (i.e., the abutting ring 11 is used to abut against the circumferential side of the inner wall of the spool cavity corresponding to the input connection port), and a through hole communicating the input channel 101 and the gas communication channel is provided on the first sealing portion. The through hole is configured to be abutted and cut off the input channel 101 and the gas communication channel by the conversion valve spool. That is, the first sealing portion may be set as an annular sealing structure, and the through hole in the inner circle is the through hole.

[0070] Specifically, the first sealing portion may specifically include a first sealing ring 2 and a first sealing gasket 3 stacked and arranged. The first sealing ring 2 is disposed on the side close to the input connection port, specifically on the inner wall surface of the spool cavity 102 corresponding to the input connection port and surrounds the input connection port. The first sealing gasket 3 is disposed on the side close to the abutting ring 11. The first sealing ring 2 may specifically be an O-ring, and the first sealing gasket 3 may specifically be a PTFE gasket, and the PTFE gasket is provided with the above-mentioned through hole. During installation, the rear cover bracket 6 is installed on the main body housing 1, the slide rail member on the rear cover bracket 6 extends into the spool cavity 102, and the abutting ring 11 thereon abuts and presses tightly against the PTFE gasket and the O-ring, thereby realizing the sealing between the abutting ring 11 and the wall surface of the spool cavity 102; and the conversion valve spool moves upward under the buoyancy of the fire-fighting medium and abuts and presses tightly against the side of the PTFE gasket facing it and the through hole of the PTFE gasket, realizing the closing of the through hole, and thus cutting off the air flow channel.

[0071] In this embodiment, in order to further improve the closing speed and closing accuracy of the air flow channel, the cross-sectional area of the above-mentioned guiding channel section may be set to be smaller than the cross-sectional area of the conversion valve spool (i.e., set to be smaller than the cross-sectional area of the spool guiding channel), and the axis of the guiding channel section may be set to be coaxial with the axis of the spool guiding channel. Thus, after the fire-fighting medium enters from the connection channel section, it is ejected from the guiding channel section toward the spool guiding channel. The coaxial setting makes the moving direction of the fire-fighting medium consistent with the moving trajectory of the conversion valve spool, and the cross-sectional area of the guiding channel section is set to be smaller than the cross-sectional area of the conversion valve spool, so that the force in the liquid moving direction directly acts on the surface of the conversion valve spool.

[0072] In this embodiment, the included angle formed by the axis of the above-mentioned input channel 101 and the axis of the valve core sliding channel is 45°. That is, the included angles between the axes of the valve core sliding channel and the valve core cavity 102 and the above-mentioned mounting surface are also 45°. If the included angle is greater than 45°, the overall length of the conversion valve body increases, and the installation space is limited. If the included angle is less than 45°, due to the volume requirement of the atomization channel itself, there will be position interference, and the atomization channel needs to move downward, resulting in an increase in the area of the mounting surface, which is not conducive to the installation of the battery pack. And the 135° pipe bend transition is conducive to the passage of gas and reduces the kinetic energy loss.

[0073] In this embodiment, the above-mentioned atomization channel may specifically include a first installation through hole opened in the conversion valve body and an atomization nozzle 9. The first end of the first installation through hole communicates with the valve core cavity 102, and the second end of the first installation through hole penetrates the mounting surface. The axis of the first installation through hole may be set parallel to the input channel 101, and the first installation through hole may be arranged below the input channel 101. The atomization nozzle 9 is installed in the first installation through hole for atomizing and ejecting the fire extinguishing medium.

[0074] In this embodiment, the conversion valve core may specifically be a spherical valve core 4 (the spherical valve core 4 slides more smoothly in the valve core sliding channels formed by each slide rail body 10), and the gravity of the spherical valve core 4 is less than the buoyancy generated by it in the fire extinguishing medium. The specific material of the spherical valve core 4 may be a plastic ball core or a metal hollow ball. According to relevant design standards, the fire extinguishing liquid pressure at the lowest point nozzle is not less than 0.3MP, and the contact area between the spherical valve core 4 and the tetrafluoro gasket is extremely small, and the actual pressure is much greater than 3kg to meet the sealing pressure.

[0075] The above has described the embodiments of the present invention in detail in conjunction with the drawings. However, the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, provided that these changes fall within the scope of the claims of the present invention and its equivalent technologies, they still fall within the protection scope of the present invention.

Claims

1. An electric energy storage safety protection system, characterized in that: Used to detect one or more battery cluster modules, each of which includes multiple battery packs, including: A detection host, wherein the detection host is configured to detect the received mixed gas; A plurality of conversion valves corresponding to the battery packs one by one, the conversion valves comprising a first airflow end, a second airflow end and a firefighting medium output end, the conversion valves being configured to switch between a detection operation configuration in which the first airflow end and the second airflow end are connected and a firefighting operation configuration in which the second airflow end and the firefighting medium output end are connected; the first airflow end and the firefighting medium output end of each of the conversion valves are connected to the corresponding battery pack, and the second airflow end of each of the conversion valves is respectively connected to the input end of the detection host through a pipeline; A plurality of return air regulating valves correspond one to one with the battery packs, wherein the return air regulating valve comprises a third airflow end and a fourth airflow end which are connected to each other, wherein the third airflow end is connected to the output end of the detection host through a pipeline, and the fourth airflow end is connected to the corresponding battery pack; the return air regulating valve is configured to adjust the return air flow rate of the return air channel formed between the third airflow end and the fourth airflow end to control the air outlet flow rate output by the battery pack via the conversion valve.

2. The electric energy storage safety protection system according to claim 1, characterized in that: The return air regulating valve comprises a regulating valve housing, a regulating valve core, a three-way quick connector and a shaft core bracket; The third air flow end, the fourth air flow end and the return air channel are respectively provided at two ends of the regulating valve housing, the regulating valve core is arranged in the return air channel, the shaft core bracket is penetrated through the regulating valve housing and connected to the driving end of the regulating valve core, and the shaft core bracket is configured to drive the regulating valve core to rotate so as to adjust the return air flow of the return air channel; The three-way quick-connect includes a valve body return air interface, a first main return air interface, and a second main return air interface. The valve body return air interface is connected to the third air flow end, and the first main return air interface and the second main return air interface are connected to the main return air line of the detection host.

3. The electric energy storage safety protection system according to claim 2, characterized in that: The third airflow end and the fourth airflow end are respectively the regulating opening and the output opening on the regulating valve housing, and the regulating opening, the output opening and the return air channel are coaxial; the regulating valve housing is also provided with a regulating channel perpendicular to the return air channel, and the shaft core bracket is installed in the regulating channel.

4. The electric energy storage safety protection system according to claim 2, characterized in that: The regulating valve core comprises a ball core and two regulating valve seals arranged on both sides of the ball core along the axis of the return air channel; a step surface for abutting against the regulating valve seal close to the fourth air flow end is provided in the return air channel; The valve body return air interface is provided with an external thread, and the third air flow end is provided with an internal thread. The valve body return air interface is connected to the internal thread through the external thread, and the end face of the valve body return air interface abuts against the regulating valve seal close to the third air flow end.

5. The electric energy storage safety protection system according to claim 2, characterized in that: A plurality of scale marks corresponding to the shaft core bracket are arranged on the outer side wall of the regulating valve housing.

6. The electric energy storage safety protection system according to claim 1, characterized in that: The conversion valve comprises a conversion valve body and a conversion valve core; The conversion valve body is provided with a mounting surface for mounting to a battery pack, the conversion valve body is provided with a valve core cavity inclined to a horizontal plane, the conversion valve body is provided with an input channel and an output channel connected to both ends of the valve core cavity, the height of the input channel is higher than the output channel, and the input channel penetrates to the mounting surface; One end of the valve core cavity connected to the input channel is an input connection port, and one end of the valve core cavity connected to the output channel is an output connection port. A valve core sliding channel connecting the input connection port and the output connection port is provided in the valve core cavity, and a gas communication channel connecting the input connection port and the output connection port is provided in the valve core cavity; wherein an opening maintaining structure is provided in the output connection port and / or the valve core sliding channel; The conversion valve body is provided with an atomization channel, the input end of the atomization channel is connected to the valve core cavity, and the atomization channel is configured to have a preset opening pressure; The conversion valve core is slidably connected to the valve core sliding channel, and the conversion valve core is configured to switch between a detection operation configuration and a fire fighting operation configuration; In the detection operation configuration, the valve core of the conversion valve falls freely under the action of gravity and is limited by the opening maintenance structure to be spaced from the output connection port, the input channel and the output channel are maintained in communication, and the pressure in the valve core cavity is less than the preset opening pressure; In the fire-fighting operation configuration, the valve core of the conversion valve overcomes gravity and rises and closes the input connection port under the action of the fire-fighting medium input into the output channel, and the pressure of the fire-fighting medium in the valve core cavity overcomes the preset opening pressure and is atomized and output through the atomization channel.

7. The electric energy storage safety protection system according to claim 6, characterized in that: The conversion valve body comprises a main body shell and a rear cover bracket; The main body shell comprises a connected horizontal main body section and an inclined main body section, the horizontal main body section is provided with the input channel and the atomization channel, and the inclined main body section is provided with the valve core cavity; The rear cover bracket is connected to the main body shell, and the output channel is arranged in the rear cover bracket.

8. The electric energy storage safety protection system according to claim 7, characterized in that: The rear cover bracket is provided with a slide rail component for extending into the valve core cavity, and the slide rail component includes an abutment ring and a plurality of slide rail bodies spaced apart around the axis of the valve core sliding channel, the first ends of the slide rail bodies are respectively connected to the rear cover bracket, and the second ends of the slide rail bodies are respectively connected to the abutment rings, and the abutment rings are configured to abut against the input connection port.

9. The electric energy storage safety protection system according to claim 8, characterized in that: It also includes a first sealing portion, which is arranged between the abutment ring and the input connection port, and the first sealing portion is provided with a through hole connecting the input channel and the gas communication channel, and the through hole is configured to be adhered by the valve core and cut off the input channel and the gas communication channel.

10. The electric energy storage safety protection system according to claim 6, characterized in that: The valve core of the conversion valve is a spherical valve core, and the gravity of the spherical valve core is smaller than the buoyancy generated by the spherical valve core in the fire-fighting medium.

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