Switching valve for an electrical energy storage safety protection system

Abstract

The utility model discloses a kind of conversion valves for electric energy storage safety protection system, by setting up columnar valve core cavity in valve body, input connector is set in the other end of columnar valve core cavity, through the gas output channel and liquid output channel of setting in flow output body, columnar valve core cavity is then set columnar valve core, is driven by the driving assembly in driving cavity, misregistration liquid through hole and gas through hole are set on columnar valve core, and driving assembly is set to include driving piece, limit contact piece and initial position switch, limit contact piece and initial position switch cooperate to determine the initial position of columnar valve core, and then control opening degree by rotation angle on the basis of initial position determination, solve the problem that existing three-way valve cannot satisfy the opening degree accurate adjustment demand of electric energy storage safety protection system.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric energy storage safety protection system, and in particular relates to a switching valve used in an electric energy storage safety protection system. Background Technology

[0002] With the increasing depletion of traditional energy sources, the development of new energy sources has been greatly promoted, and the installed capacity has also increased rapidly. New energy power generation, such as wind and solar power, depends on natural conditions and is characterized by fluctuations and intermittency, making regulation and control difficult. Large-scale grid connection can significantly impact the safe and stable operation of the power grid. Energy storage technology can greatly solve the problems of randomness and fluctuation in new energy power generation and improve the utilization rate of renewable and clean energy. Large-scale new energy installations have spurred the rapid development of large-scale energy storage systems.

[0003] Currently, the fastest-growing energy storage technology for large-scale applications is large-scale battery energy storage. Its advantages lie in the flexible configuration of power and energy according to different application needs, its fast response speed, and its suitability for large-scale applications and mass production. In recent years, driven by practical needs and policy requirements, large-scale battery energy storage power stations have begun to be constructed and put into operation in large numbers. While battery energy storage offers many advantages, batteries are devices containing high-energy materials, posing certain safety risks and a probability of dangerous accidents. As the scale of battery energy storage systems expands, the probability of dangerous accidents will increase significantly. Typically, under the combined effects of external electrical and thermal stimuli and the battery's own aging, energy storage batteries may experience thermal runaway, releasing a large amount of high-temperature flammable gas mixture. When this mixture encounters oxygen in the external air and an electrical spark, it can easily explode.

[0004] Existing energy storage power stations are composed of individual battery cabinets arranged inside shipping containers. Since shipping containers are typically of standard size, in order to maximize battery capacity and save costs, the volume and cost of each battery cabinet must be minimized as much as possible. A typical battery cabinet includes a cabinet body and several battery packs stacked inside the cabinet. Each battery pack is susceptible to thermal runaway and other issues.

[0005] Existing safety protection solutions typically involve installing a multi-functional detector on each battery pack inside the cabinet. This allows for the individual monitoring of temperature and escaping gases within the battery pack. If an anomaly is detected, a fire suppression procedure is initiated, injecting extinguishing agent into the corresponding battery pack via pipelines to suppress and extinguish the fire. However, this approach results in excessively high costs because a detector is required for each battery pack.

[0006] Another existing safety protection scheme involves extracting gas from each battery pack for detection and then returning it to the battery pack to form a gas circulation. However, to minimize the overall size of the battery cabinet, this method typically uses a three-way valve to integrate the gas extraction path into the existing fire suppression pipeline, thus switching between the fire suppression path and the gas circulation path. However, conventional three-way valves lack opening adjustment capabilities, meaning they cannot precisely control the flow area of ​​the resulting channel. In this type of energy storage safety protection system, gas needs to be extracted from each battery pack. Since the distance and pipeline length between each battery pack and the detection unit vary, without controlling the opening of the three-way valve, the gas flow rate in battery packs farther from the detection unit will be significantly less than that in battery packs closer to the detection unit, leading to inaccurate detection results. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a switching valve for an electric energy storage safety protection system, so as to solve the problem that the existing three-way valve cannot meet the precise opening adjustment requirements of the electric energy storage safety protection system.

[0008] To solve the above problems, the technical solution of this utility model is as follows: This utility model discloses a switching valve for an electric energy storage safety protection system, comprising: The valve body has a columnar valve core cavity with one end connected to the outside, and an input connector connected to the first axial end of the columnar valve core cavity is provided on the valve body; the valve body has a fluid output body arranged on one radially upward side of the columnar valve core cavity and a drive cavity arranged on the second axially upward side of the columnar valve core cavity, and the fluid output body has a gas output channel and a liquid output channel arranged in parallel and connected to the columnar valve core cavity; A columnar valve core is coaxially and rotatably connected to the columnar valve core cavity. The columnar valve core has a hollow inner cavity. One end of the columnar valve core facing the input connector has an axial opening communicating with the hollow inner cavity. The outer circumferential surface of the columnar valve core has liquid through holes and gas through holes arranged axially at intervals. The projections formed by the liquid through holes and the gas through holes along the axial direction of the columnar valve core do not interfere with each other. An atomizing structure is disposed in the liquid output channel; A drive assembly is disposed within the drive cavity, and the power output end of the drive assembly extends into the columnar valve core cavity and is connected to the columnar valve core in a driving connection. A control unit is disposed in the drive cavity and is signal-connected to the drive assembly. The control unit is configured to receive external control signals and control the drive assembly to drive the columnar valve core to rotate, so as to adjust the opening degree of the gas through hole to open the gas output channel. The driving assembly includes a driving element, a limiting contact element, and an initial position switch. The driving element is arranged within the driving cavity, and its output end is tractively connected to the columnar valve core. The initial position switch is located within the driving cavity and is correspondingly arranged at the initial position of the columnar valve core. The limiting contact element is installed on the columnar valve core and / or the output end of the driving element, and is correspondingly arranged with the initial position switch, for being driven by the driving element and abutting against the initial position switch to position the columnar valve core at its initial position.

[0009] The present invention relates to a switching valve for an electric energy storage safety protection system, wherein the driving component is a drive motor, the drive motor is installed in the drive cavity and is signal-connected to the control unit; the output shaft of the drive motor is coaxially arranged with the columnar valve core, and the output shaft of the drive motor is inserted into the corresponding connection hole of the columnar valve core and positioned by the set screw; At least a portion of the set screw extends beyond the outer ring surface of the cylindrical valve core, and the extended portion of the set screw is the limiting contact. The initial position switch is a limit switch, and the limit switch is signal-connected to the control unit.

[0010] This utility model discloses a switching valve for an electric energy storage safety protection system. The driving component is configured to drive the columnar valve core to change between a gas output configuration, a liquid output configuration, and a closed configuration within the columnar valve core cavity. In the gas output configuration, the columnar valve core rotates until the gas through hole communicates with at least a portion of the gas output channel, and the liquid through hole is misaligned with the liquid output channel. In the liquid output configuration, the columnar valve core rotates until the liquid through hole communicates with at least a portion of the liquid output channel, and the gas through hole is misaligned with the gas output channel. In the closed configuration, the liquid through hole is misaligned with the liquid output channel, and the gas through hole is misaligned with the gas output channel.

[0011] The present invention relates to a switching valve for an electric energy storage safety protection system, wherein the columnar valve core is in the initial position, and the columnar valve core and the columnar valve core cavity cooperate to form the gas output configuration.

[0012] The switching valve of this utility model for an electric energy storage safety protection system further includes a detection unit, which is configured to detect detection data in the gas output channel and output it to an external detection host. The detection data includes gas flow data, or the detection data includes gas flow data and gas temperature data.

[0013] The present invention relates to a switching valve for an electric energy storage safety protection system. The detection unit includes a flow-temperature sensor. The fluid output body is provided with a sensor channel with both ends connected to the gas output channel and the drive chamber. The flow-temperature sensor is arranged in the sensor channel and is signal-connected to the control unit. A sensor seal is provided between the sensor channel and the flow-temperature sensor.

[0014] The present invention relates to a switching valve for an electric energy storage safety protection system, wherein one end of the columnar valve core facing the input connector is slidably connected to the columnar valve core cavity via a first bushing, and the other end of the columnar valve core facing the drive cavity is slidably connected to the columnar valve core cavity via a second bushing.

[0015] The switching valve of this utility model for an electric energy storage safety protection system further includes a valve core sealing assembly, which includes a connector gasket and a drive chamber sealing ring; the connector gasket is sleeved on the columnar valve core and is located between the input connector and the first bushing; the drive chamber sealing ring is arranged between the columnar valve core and the columnar valve core cavity and is located between the second bushing and the gas through hole.

[0016] The switching valve of this utility model for an electric energy storage safety protection system also includes a gas channel sealing assembly and a liquid channel sealing assembly. The gas channel sealing assembly is arranged in the gas output channel, and the top end of the gas channel sealing assembly is configured to extend into the columnar valve core cavity and support the columnar valve core. In the gas output configuration, the top end of the gas channel sealing assembly is arranged around the gas through hole, and a first radial through hole communicating with the hollow inner cavity is formed in the gas channel sealing assembly. The liquid channel sealing assembly is arranged in the liquid output channel, and the top end of the liquid channel sealing assembly is configured to extend into the columnar valve core cavity and support the columnar valve core. In the liquid output configuration, the top end of the liquid channel sealing assembly is arranged around the liquid through hole, and a second radial through hole communicating with the hollow inner cavity is formed in the liquid channel sealing assembly. The atomizing structure is arranged in the second radial through hole.

[0017] The switching valve for an electric energy storage safety protection system of this utility model also includes a sealing gasket assembly. The sealing gasket assembly is installed on the fluid output body, and the sealing gasket assembly is respectively provided with through holes corresponding to the first radial through hole and the second radial through hole. The gas channel sealing assembly includes a pore spring plug and a pore sealing gasket. The pore sealing gasket is arranged in the gas output channel, and at least a portion of the pore sealing gasket extends into the columnar valve core cavity. The pore spring plug is arranged between the pore sealing gasket and the sealing gasket assembly for outputting elastic force to the pore sealing gasket. The liquid channel sealing assembly includes a liquid orifice spring plug and a liquid orifice sealing gasket. The liquid orifice sealing gasket is arranged in the liquid output channel, and at least a portion of the liquid orifice sealing gasket extends into the cylindrical valve core cavity. The liquid orifice spring plug is arranged between the liquid orifice sealing gasket and the sealing gasket assembly for outputting elastic force to the liquid orifice sealing gasket.

[0018] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art: One embodiment of this utility model involves setting a columnar valve core cavity within the valve body, and respectively setting a flow output body and a drive cavity in the radial and axial directions of the columnar valve core cavity. An input connector for connecting to a battery pack via a pipeline is provided at the other end of the columnar valve core cavity. A through gas output channel and a liquid output channel are provided within the flow output body. A columnar valve core is set inside the columnar valve core cavity, and this columnar valve core is driven to rotate by a drive component within the drive cavity. The columnar valve core has staggered liquid and gas through holes. The drive component includes a drive element, a limit contact element, and an initial position switch. The limit contact element and the initial position switch cooperate to determine the initial position of the columnar valve core. Based on the determined initial position, the opening degree is precisely controlled by controlling the rotation angle to achieve balanced gas circulation in battery packs at different distances from the external detection host, ensuring detection accuracy. This solves the problem that existing three-way valves cannot meet the precise opening adjustment requirements of energy storage safety protection systems.

[0019] Furthermore, by setting the valve core cavity and valve core to be cylindrical, the volume of the valve core of the switching valve can be greatly reduced compared to the ball valve. The cylindrical valve core setting also greatly reduces the power required to drive its rotation, thereby reducing the volume required for the drive cavity and thus reducing the overall volume of the switching valve. In addition, the cost is also reduced, thus solving the problem of large battery cabinet size and high cost caused by existing electric energy storage safety protection schemes. Attached Figure Description

[0020] Figure 1 This is an exploded view of the switching valve of the present invention used in an electric energy storage safety protection system; Figure 2 This is a cross-sectional view of the switching valve of the present invention used in an electric energy storage safety protection system; Figure 3 This is a partially enlarged cross-sectional view of the switching valve used in the electric energy storage safety protection system of this utility model; Figure 4 This is a schematic diagram of the switching valve of the present invention used in an electric energy storage safety protection system.

[0021] Explanation of reference numerals in the attached drawings: 1. Connector gasket; 2. First bushing; 3. Columnar valve core; 4. Set screw; 5. Drive chamber sealing ring; 6. Valve body; 7. PCBA board; 8. Drive motor; 9. Control board screw; 10. Motor screw; 11. Housing screw; 12. Drive housing; 13. Bottom mounting plate; 14. Bottom screw; 15. Bottom sealing gasket; 16. Gas spring plug; 17. Atomizing structure; 18. Gas sealing gasket; 19. Liquid spring plug; 20. Liquid sealing gasket; 21. Input connector; 22. Flow-temperature sensor; 23. Second bushing; 24. Sensor seal; 25. Initial position switch. Detailed Implementation

[0022] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a switching valve for an electric energy storage safety protection system based on this utility model. The advantages and features of this utility model will become clearer from the following description and claims.

[0023] Example 1 See Figures 1 to 4 In one embodiment, a switching valve for an electric energy storage safety protection system includes a valve body 6, a columnar valve core 3, an atomizing structure 17, a drive assembly, and a control unit.

[0024] The valve body 6 has a cylindrical valve core cavity with one end connected to the outside. The valve body 6 also has an input connector 21 connected to the first axial end of the cylindrical valve core cavity (i.e., the input connector 21 is located at the end of the cylindrical valve core cavity connected to the outside; this input connector 21 can be a quick connector, connected to the battery pack via a pipeline; the quick connector can be connected to the first axial end of the cylindrical valve core cavity using an embedded or threaded connection to ensure sealing performance as much as possible). The valve body 6 has a fluid output body arranged radially upward on one side of the cylindrical valve core cavity and a drive cavity arranged axially upward at the second end of the cylindrical valve core cavity. The fluid output body has a parallel gas output channel and a liquid output channel connected to the cylindrical valve core cavity. The atomizing structure 17 is located within the liquid output channel, used to atomize the extinguishing agent within the liquid output channel and output it to the battery pack (wherein, the gas output channel is used to connect to the gas input port of the external detection host via a pipeline, while the liquid output channel is used to connect to the battery pack via a pipeline).

[0025] The columnar valve core 3 is coaxially and rotatably connected to the columnar valve core cavity. The columnar valve core 3 has a hollow inner cavity. One end of the columnar valve core 3 facing the input connector 21 has an axial opening that communicates with the hollow inner cavity. The outer circumferential surface of the columnar valve core 3 has liquid through holes and gas through holes arranged axially at intervals. The projections formed by the liquid through holes and the gas through holes along the axial direction of the columnar valve core do not interfere with each other. The purpose of the two projections not interfering with each other is to ensure that only the gas output channel or the liquid output channel is always open (the axis of the liquid through hole and the axis of the gas through hole can be set to be perpendicular to each other or other required angles, as long as only one of the liquid through hole and the gas through hole is always in the open state, which is not specifically limited here).

[0026] The drive assembly is disposed within the drive chamber. The power output end of the drive assembly extends into the cylindrical valve core cavity and is drively connected to the cylindrical valve core 3. The drive assembly is configured to drive the cylindrical valve core 3 to change between a gas output configuration and a liquid output configuration within the cylindrical valve core cavity. In the gas output configuration, the cylindrical valve core 3 rotates until the gas through hole communicates with at least a portion of the gas output channel, and the liquid through hole is misaligned with the liquid output channel (i.e., the liquid through hole and the liquid output channel are not connected at this time, and gas can enter the hollow inner cavity of the cylindrical valve core 3 from the quick connector and enter the gas output channel through the gas through hole and then be output). In the liquid output configuration, the cylindrical valve core 3 rotates until the liquid through hole communicates with at least a portion of the liquid output channel, and the gas through hole is misaligned with the gas output channel (i.e., the gas through hole and the gas output channel are not connected at this time, and liquid can enter the hollow inner cavity of the cylindrical valve core 3 from the quick connector and enter the liquid output channel through the liquid through hole, and then be atomized by the atomizing structure 17 within the liquid output channel before being output).

[0027] The control unit is located inside the drive chamber and is connected to the drive assembly via a signal. The control unit is configured to receive external control signals and control the drive assembly to rotate the columnar valve core 3 to adjust the opening degree of the gas through hole to open the gas output channel (that is, by adjusting the rotation angle of the columnar valve core 3, the area of ​​the overlapping part of the gas through hole and the gas output channel is controlled, while the suction provided by the external detection host is uniform and stable, thereby adjusting the flow rate and velocity of the gas circulation pipeline formed by each battery pack by adjusting the flow area).

[0028] The drive assembly includes a drive element, a limit contact element, and an initial position switch 25. The drive element is arranged inside the drive cavity, and its output end is drively connected to the columnar valve core 3. The initial position switch 25 is located inside the drive cavity and is correspondingly arranged at the initial position of the columnar valve core 3. The limit contact element is installed on the output end of the columnar valve core 3 and / or the drive element, and is correspondingly arranged with the initial position switch 25. It is driven by the drive element and abuts against the initial position switch 25 to position the columnar valve core 3 at its initial position.

[0029] This embodiment sets a columnar valve core cavity inside the valve body 6, and sets a flow output body and a drive cavity in the radial and axial directions of the columnar valve core cavity, respectively. The other end of the columnar valve core cavity is provided with an input connector 21 for connecting to the battery pack through a pipeline. The flow output body is provided with a through gas output channel and a liquid output channel. The columnar valve core cavity is provided with a columnar valve core 3, which is driven to rotate by a drive component in the drive cavity. The columnar valve core 3 is provided with staggered liquid through holes and gas through holes. The drive component is set to include a drive component, a limit contact component and an initial position switch 25. The limit contact component and the initial position switch 25 cooperate to determine the initial position of the columnar valve core 3. Then, based on the initial position determination, the opening degree is precisely controlled by controlling the rotation angle to achieve the balance of gas circulation of the battery pack at different distances from the external detection host, so as to ensure the accuracy of detection. This solves the problem that the existing three-way valve cannot meet the precise opening adjustment requirements of the energy storage safety protection system.

[0030] Furthermore, by setting the valve core cavity and valve core to be cylindrical, the volume of the valve core of the switching valve can be greatly reduced compared to that of the ball valve. Moreover, the cylindrical valve core 3 setting greatly reduces the power required to drive its rotation, thereby reducing the volume required for the drive cavity and thus reducing the overall volume of the switching valve. In addition, the cost is also reduced, thus solving the problem of large battery cabinet size and high cost caused by existing electric energy storage safety protection schemes.

[0031] The specific structure of the switching valve used in the electric energy storage safety protection system of this embodiment is further described below: In this embodiment, the aforementioned driving component is specifically a drive motor 8. The drive motor 8 is installed inside the drive cavity and is signal-connected to the control unit (the drive motor 8 can be specifically installed on the PCBA board 7 via motor screws 10, which can be shoulder screws). The output shaft of the drive motor 8 is coaxially arranged with the columnar valve core 3, and the output shaft of the drive motor 8 (the output end of which can be specifically set to a flat position) is inserted into the corresponding connection hole of the columnar valve core 3 and positioned by set screws 4.

[0032] The initial position switch 25 is located within the drive chamber and is positioned corresponding to the initial position of the cylindrical valve core 3. At least a portion of the set screw 4 extends beyond the outer ring surface of the cylindrical valve core 3, and the extended portion of the set screw 4 corresponds to the initial position switch 25. This extended portion of the set screw 4 serves as the aforementioned limiting contact. Consequently, when the switching valve is initially powered on, the drive motor 8 can rotate the set screw 4 and the cylindrical valve core 3 clockwise together. When the set screw 4 presses against the initial position switch 25, the drive motor 8 stops rotating to prevent it from stalling. This is the initial state, which can then be configured for the corresponding gas output configuration.

[0033] Specifically, the initial position switch can be a limit switch, and the limit switch is connected to the control unit signal.

[0034] In this embodiment, the aforementioned driving component is further configured to drive the columnar valve core 3 to form a closed configuration within the columnar valve core cavity. In the closed configuration, the liquid through hole and the liquid output channel are misaligned, and the gas through hole and the gas output channel are also misaligned (i.e., at this time, the gas through hole and the gas output channel are not connected, and the liquid through hole and the liquid output channel are also not connected).

[0035] Taking the setting of the liquid through hole and the gas through hole as perpendicular (90° angle) as an example, the above gas output configuration, liquid output configuration and closed configuration are illustrated. In this example, the gas output configuration is set as the initial position, which is in a fully open state. The gas flow area in the gas output configuration can be gradually reduced by rotating the columnar valve core 3 by a small angle. The liquid output configuration is entered into a fully open state after rotating the columnar valve core 3 by 90°. The size of the liquid flow area can be controlled by continuing to rotate or turning back a small angle (but the liquid output configuration is basically in a fully open state during the fire extinguishing stage). The closed configuration is to continue to rotate an angle from the fully open state of the liquid output configuration until the liquid output channel is not connected, or to turn back an angle from the fully open state of the gas output configuration until the gas output channel is not connected.

[0036] In this embodiment, in order to detect the gas flow rate in the gas output channel, the switching valve further includes a detection unit. The detection unit is configured to detect the detection data in the gas output channel and output it to an external detection host. The detection data includes gas flow rate data, or the detection data includes gas flow rate data and gas temperature data.

[0037] Specifically, the detection unit can be a flow-temperature sensor 22. The fluid output body described above can be provided with a sensor channel with two ends connecting the gas output channel and the drive chamber. The flow-temperature sensor 22 is arranged in the sensor channel and is signal-connected to the control unit. In order to ensure that the gas does not leak from the sensor channel, a sensor seal 24 is provided between the sensor channel and the flow-temperature sensor 22. The sensor seal 24 can be an O-ring. Specifically, an annular sealing groove can be provided at one end of the sensor channel located in the drive chamber, and the O-ring is installed in the annular sealing groove. The control unit can press the O-ring to achieve a seal.

[0038] In this embodiment, to ensure smooth rotation between the columnar valve core 3 and the columnar valve core cavity, the end of the columnar valve core 3 facing the input connector 21 is slidably connected to the columnar valve core cavity via the first bushing 2, and the end of the columnar valve core 3 facing the drive cavity is slidably connected to the columnar valve core cavity via the second bushing 23. Both the first bushing 2 and the second bushing 23 can be oil-free bushings.

[0039] In order to facilitate the installation and positioning of the columnar valve core 3, the position of the columnar valve core 3 corresponding to the second bushing 23 can be set as a stepped shaft with a smaller diameter. The stepped surface of the columnar valve core 3 can cooperate with the corresponding stepped surface in the columnar valve core cavity to achieve axial positioning.

[0040] In this embodiment, to prevent gas or liquid leakage at the rotating connection of the valve core, the switching valve may further include a valve core sealing assembly, which includes a connector gasket 1 and a drive chamber sealing ring 5. The connector gasket 1 is sleeved on the columnar valve core 3 and is located between the input connector 21 and the first bushing 2. When the input connector 21 is installed into the columnar valve core cavity, the connector gasket 1 is squeezed, causing it to expand and tighten between the input connector 21 and the first bushing 2 and / or the columnar valve core 3, thus achieving a seal at this end. The drive chamber sealing ring 5 (specifically, an O-ring) is arranged between the columnar valve core 3 and the columnar valve core cavity, and is located between the second bushing 23 and the gas through hole. Specifically, the drive chamber sealing ring 5 may be set on the stepped shaft with a smaller diameter of the columnar valve core 3 (specifically, near the stepped surface), thereby achieving a seal at this end. Since the switching valve does not require much rotation, only the adjustment of the initial gas output channel opening and the switching to the liquid output configuration for the fire extinguishing stage are needed, sealing through the connector gasket 1 and the drive chamber sealing ring 5 is feasible, effective and cost-saving.

[0041] In this embodiment, to prevent gas from leaking from the gap between the columnar valve core 3 and the gas output channel and the liquid output channel, the switching valve may also include a gas channel sealing assembly and a liquid channel sealing assembly.

[0042] The gas passage sealing assembly is arranged within the gas output passage, and its top end is configured to extend into the cylindrical valve core cavity and support the cylindrical valve core 3. The liquid passage sealing assembly is arranged within the liquid output passage, and its top end is configured to extend into the cylindrical valve core cavity and support the cylindrical valve core 3.

[0043] In the gas output configuration, the top of the gas channel sealing assembly surrounds the gas through hole, and a first radial through hole is formed inside the gas channel sealing assembly, connecting the hollow inner cavity. At this time, the gas inside the columnar valve core 3 enters the gap between the columnar valve core 3 and the columnar valve core cavity through the liquid through hole, while the top of the liquid channel sealing assembly abuts against the outer ring surface of the columnar valve core 3, thereby preventing leakage of this portion of the gas at the liquid channel sealing assembly.

[0044] In the liquid output configuration, the top of the liquid channel sealing assembly surrounds the liquid through hole, and a second radial through hole is formed inside the liquid channel sealing assembly, connecting the hollow inner cavity. The atomizing structure 17 is disposed in this second radial through hole. At this time, the liquid in the columnar valve core 3 enters the gap between the columnar valve core 3 and the columnar valve core cavity through the gas through hole, while the top of the gas channel sealing assembly abuts against the outer ring surface of the columnar valve core 3, thereby preventing leakage of this part of the liquid at the gas channel sealing assembly.

[0045] In the closed configuration, gas / liquid can enter the gap between the columnar valve core 3 and the columnar valve core cavity through the gas through hole and the liquid through hole. The top of the gas channel sealing assembly supports the outer ring surface of the columnar valve core 3, and the top of the liquid channel sealing assembly supports the outer ring surface of the columnar valve core 3, thereby preventing gas / liquid leakage at the gas channel sealing assembly and the liquid channel sealing assembly.

[0046] Furthermore, the switching valve may also include a sealing gasket assembly, which is mounted on the fluid output body and has through holes corresponding to the first radial through hole and the second radial through hole, respectively. Specifically, the sealing gasket assembly may include a bottom sealing gasket 15 and a bottom mounting plate 13 (which may be a metal plate). The bottom sealing gasket 15 is positioned to fit against the side of the fluid output body away from the cylindrical valve core cavity. The bottom mounting plate 13 is pressed onto the bottom sealing gasket 15 and positioned on the fluid output body by a bottom screw 14, thereby compressing the bottom sealing gasket 15 to achieve a seal.

[0047] The aforementioned gas passage sealing assembly may include a pore spring plug 16 and a pore sealing gasket. The pore sealing gasket is arranged in the gas output passage, and at least a portion of the pore sealing gasket extends into the cylindrical valve core cavity. The pore spring plug 16 is arranged between the pore sealing gasket and the sealing gasket assembly to output elastic force to the pore sealing gasket. Specifically, the gas output passage may be configured to include a small-diameter section of the gas passage near the cylindrical valve core cavity and a large-diameter section of the gas passage away from the cylindrical valve core cavity, forming a stepped surface of the gas passage between the small-diameter section and the large-diameter section. The pore sealing gasket may be disposed within the small-diameter section of the gas passage, and the pore spring plug 16 may be installed in the large-diameter section of the gas passage by means of a threaded connection. The protruding portion of the pore spring plug 16 extends into and presses against the pore sealing gasket. The stepped surface of the gas passage can limit the installation position of the pore spring plug 16 and output appropriate limiting and pressing force to the pore sealing gasket, ensuring that the required sealing performance is achieved and that the drive assembly can drive the cylindrical valve core 3 to rotate.

[0048] The liquid channel sealing assembly includes a liquid orifice spring plug 19 and a liquid orifice sealing gasket 20. The liquid orifice sealing gasket 20 is arranged in the liquid output channel, and at least a portion of the liquid orifice sealing gasket 20 extends into the cylindrical valve core cavity. The liquid orifice spring plug 19 is arranged between the liquid orifice sealing gasket 20 and the sealing gasket assembly for outputting elastic force to the liquid orifice sealing gasket 20. Similarly, the liquid output channel can be configured to include a small-diameter section of the liquid passage near the cylindrical valve core cavity and a large-diameter section of the liquid passage away from the cylindrical valve core cavity, forming a stepped surface of the liquid passage between the small-diameter section and the large-diameter section. The liquid hole sealing gasket 20 can be set in the small-diameter section of the liquid passage, and the liquid hole spring plug 19 can be installed in the large-diameter section of the liquid passage by means of threaded connection. The protruding part of the liquid hole spring plug 19 extends into and presses against the liquid hole sealing gasket 20. The stepped surface of the liquid passage can limit the installation position of the liquid hole spring plug 19 and output appropriate limit and pressing force to the liquid hole sealing gasket 20, ensuring that the required sealing performance is achieved here, and that the drive assembly can drive the cylindrical valve core 3 to rotate.

[0049] The liquid pore sealing gasket 20 and the air pore sealing gasket can be made of polytetrafluoroethylene and are configured to have a suitable interference fit with the columnar valve core 3.

[0050] In this embodiment, the first bushing 2 and the second bushing 23 can compensate for the deviation of the two ends of the axis caused by the machining of the columnar valve core cavity, avoid machining errors and assembly errors, and thus ensure the stability of the rotary motion and the accuracy of the rotary axis. The aforementioned stability of the rotary motion and accuracy of the rotary axis provide a guarantee for the sealing performance formed by the air hole sealing gasket and the liquid hole sealing gasket 20 under the action of the clamping force. That is, the arrangement of the two bushings, the two sealing gaskets and the two spring plugs cooperate to realize the sealing performance of the switching valve in this embodiment at the corresponding position, and can make the resistance encountered by the columnar valve core 3 under the action of the clamping force of the two sealing gaskets basically unchanged, ensuring the reliability of the drive assembly driving the columnar valve core 3. The arrangement of the two oilless bushings can ensure that the columnar valve core 3 can rotate smoothly when the drive assembly outputs 3000gf·cm.

[0051] In this embodiment, the liquid output channel can be located on the side closer to the input connector 21, and the gas output channel can be located on the side farther away from the input connector 21. Since the pressure is relatively high in the liquid output configuration, it is located on the side closer to the input connector 21 to minimize the pressure generated at the gas output channel, thereby further reducing the leakage at the vent seal.

[0052] In this embodiment, the aforementioned drive cavity may specifically include a drive seat and a drive housing 12 formed on the valve body 6. The drive housing 12 is installed to the drive seat by housing screws 11 (specifically, cross-head screws), and a drive cavity is formed between the two.

[0053] In this embodiment, the atomizing structure 17 described above may specifically be an atomizing nozzle or other components that can atomize the fire extinguishing agent, and is not specifically limited here.

[0054] In this embodiment, the control unit mentioned above can specifically be a PCBA board 7, which can be installed to the drive seat by a control board screw 9, which can specifically be a Phillips head machine screw.

[0055] When multiple switching valves are used in parallel, the drive motor 8 can adaptively adjust the gas flow area under the gas output configuration by comparing the flow data collected by the flow-temperature sensor 22, thereby ensuring the flow balance within the multiple switching valves. Furthermore, the switching valves in this embodiment can achieve gas-liquid switching in the same inlet channel, while ensuring atomization during liquid spraying.

[0056] The challenge of this embodiment lies in the fact that when multiple switching valves are used in parallel, the valves are in a gas output configuration, connecting multiple battery packs to the detection unit via sealed pipelines, keeping the entire system in a sealed state. The detection unit has a built-in suction device that draws in the gas from the multiple battery packs for detection. To ensure that the gas drawn into the battery packs is not affected by ambient gas and that the gas from multiple battery packs can be drawn into the detection unit, the switching valves need to have a leakage of less than 6 cm³ at a pressure of 700 gf·cm⁻¹. 3 / min. To this end, the switching valve in this embodiment has multiple sealing and sliding fits. First, the connector gasket 1 ensures that gas does not leak from the input connector 21. Second, the drive chamber sealing ring 5 ensures that gas does not leak from the drive motor 8. Third, the sensor seal 24 ensures that gas does not leak from the PCBA. Fourth, the liquid hole sealing gasket 20 and the air hole sealing gasket ensure that gas does not leak from the two holes on the columnar valve core 3. Fifth, the first bushing 2 and the second bushing 23 ensure that the columnar valve core 3 can rotate smoothly under the drive motor 8 at 3000 gf·cm. Sixth, there is a suitable interference fit between the liquid hole sealing gasket 20, the air hole sealing gasket and the columnar valve core 3. At the same time, the liquid hole spring plug 19 and the air hole spring plug 16 have suitable limiting and clamping forces to ensure the sealing performance at this point and the rotation of the columnar valve core 3 by the drive motor 8 housing.

[0057] When the switching valve is switched to the liquid output configuration (fire extinguishing state), the drive motor 8 rotates and drives the columnar valve core 3 to rotate, so that the liquid through hole is connected to the liquid output channel. At this time, the fire extinguishing agent enters the hollow inner cavity of the columnar valve core from the input connector, and then enters the liquid output channel. After being atomized by the atomizing nozzle, it enters the battery pack through the subsequent pipeline to extinguish the fire.

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A switching valve for an electric energy storage safety protection system, characterized in that, include: The valve body has a columnar valve core cavity with one end connected to the outside, and an input connector connected to the first axial end of the columnar valve core cavity is provided on the valve body; the valve body has a fluid output body arranged on one radially upward side of the columnar valve core cavity and a drive cavity arranged on the second axially upward side of the columnar valve core cavity, and the fluid output body has a gas output channel and a liquid output channel arranged in parallel and connected to the columnar valve core cavity; A columnar valve core is coaxially and rotatably connected to the columnar valve core cavity. The columnar valve core has a hollow inner cavity. One end of the columnar valve core facing the input connector has an axial opening communicating with the hollow inner cavity. The outer circumferential surface of the columnar valve core has liquid through holes and gas through holes arranged axially at intervals. The projections formed by the liquid through holes and the gas through holes along the axial direction of the columnar valve core do not interfere with each other. An atomizing structure is disposed in the liquid output channel; A drive assembly is disposed within the drive cavity, and the power output end of the drive assembly extends into the columnar valve core cavity and is connected to the columnar valve core in a driving connection. A control unit is disposed in the drive cavity and is signal-connected to the drive assembly. The control unit is configured to receive external control signals and control the drive assembly to drive the columnar valve core to rotate, so as to adjust the opening degree of the gas through hole to open the gas output channel. The driving assembly includes a driving element, a limiting contact element, and an initial position switch. The driving element is arranged within the driving cavity, and its output end is tractively connected to the columnar valve core. The initial position switch is located within the driving cavity and is correspondingly arranged at the initial position of the columnar valve core. The limiting contact element is installed on the columnar valve core and / or the output end of the driving element, and is correspondingly arranged with the initial position switch, for being driven by the driving element and abutting against the initial position switch to position the columnar valve core at its initial position.

2. The switching valve for an electric energy storage safety protection system as described in claim 1, characterized in that, The driving component is a drive motor, which is installed in the drive cavity and connected to the control unit via a signal; the output shaft of the drive motor is coaxially arranged with the columnar valve core, and the output shaft of the drive motor is inserted into the corresponding connection hole of the columnar valve core and positioned by a set screw; At least a portion of the set screw extends beyond the outer ring surface of the cylindrical valve core, and the protruding portion of the set screw is the limiting contact; The initial position switch is a limit switch, and the limit switch is signal-connected to the control unit.

3. The switching valve for an electric energy storage safety protection system as described in claim 1, characterized in that, The drive assembly is configured to cause the columnar valve core to change between a gas output configuration, a liquid output configuration, and a closed configuration within the columnar valve core cavity; in the gas output configuration, the columnar valve core rotates until the gas through hole communicates with at least a portion of the gas output channel, and the liquid through hole is misaligned with the liquid output channel; in the liquid output configuration, the columnar valve core rotates until the liquid through hole communicates with at least a portion of the liquid output channel, and the gas through hole is misaligned with the gas output channel; in the closed configuration, the liquid through hole is misaligned with the liquid output channel, and the gas through hole is misaligned with the gas output channel.

4. The switching valve for an electric energy storage safety protection system as described in claim 1, characterized in that, When the columnar valve core is in its initial position, the columnar valve core and the columnar valve core cavity cooperate to form the gas output configuration.

5. The switching valve for an electric energy storage safety protection system as described in claim 1, characterized in that, It also includes a detection unit configured to detect detection data within the gas output channel and output it to an external detection host, wherein the detection data includes gas flow data, or the detection data includes gas flow data and gas temperature data.

6. The switching valve for an electric energy storage safety protection system as described in claim 5, characterized in that, The detection unit includes a flow-temperature sensor; the fluid output body has a sensor channel with both ends connected to the gas output channel and the drive cavity, the flow-temperature sensor is arranged in the sensor channel and is signal-connected to the control unit, and a sensor seal is provided between the sensor channel and the flow-temperature sensor.

7. The switching valve for an electric energy storage safety protection system as described in claim 1, characterized in that, The end of the columnar valve core facing the input connector is slidably connected to the columnar valve core cavity via a first bushing, and the end of the columnar valve core facing the drive cavity is slidably connected to the columnar valve core cavity via a second bushing.

8. The switching valve for an electric energy storage safety protection system as described in claim 7, characterized in that, It also includes a valve core sealing assembly, which includes a connector gasket and a drive chamber sealing ring; the connector gasket is sleeved on the columnar valve core and is located between the input connector and the first bushing; the drive chamber sealing ring is arranged between the columnar valve core and the columnar valve core cavity and is located between the second bushing and the gas through hole.

9. The switching valve for an electric energy storage safety protection system as described in claim 1, characterized in that, It also includes gas passage sealing assemblies and liquid passage sealing assemblies; The gas channel sealing assembly is arranged in the gas output channel, and the top end of the gas channel sealing assembly is configured to extend into the columnar valve core cavity and support the columnar valve core. In the gas output configuration, the top end of the gas channel sealing assembly is arranged around the gas through hole, and a first radial through hole communicating with the hollow inner cavity is formed in the gas channel sealing assembly. The liquid channel sealing assembly is arranged in the liquid output channel, and the top end of the liquid channel sealing assembly is configured to extend into the columnar valve core cavity and support the columnar valve core. In the liquid output configuration, the top end of the liquid channel sealing assembly is arranged around the liquid through hole, and a second radial through hole communicating with the hollow inner cavity is formed in the liquid channel sealing assembly. The atomizing structure is arranged in the second radial through hole.

10. The switching valve for an electric energy storage safety protection system as described in claim 9, characterized in that, It also includes a sealing gasket assembly, which is installed on the fluid output body, and the sealing gasket assembly is respectively provided with through holes corresponding to the first radial through hole and the second radial through hole; The gas channel sealing assembly includes a pore spring plug and a pore sealing gasket. The pore sealing gasket is arranged in the gas output channel, and at least a portion of the pore sealing gasket extends into the columnar valve core cavity. The pore spring plug is arranged between the pore sealing gasket and the sealing gasket assembly for outputting elastic force to the pore sealing gasket. The liquid channel sealing assembly includes a liquid orifice spring plug and a liquid orifice sealing gasket. The liquid orifice sealing gasket is arranged in the liquid output channel, and at least a portion of the liquid orifice sealing gasket extends into the cylindrical valve core cavity. The liquid orifice spring plug is arranged between the liquid orifice sealing gasket and the sealing gasket assembly for outputting elastic force to the liquid orifice sealing gasket.

Images