Firefighting device and energy storage power supply
By installing fire-fighting devices in energy storage power supplies, using thermal induction wires and sensors to detect thermal runaway signals, and implementing passive and active fire-fighting functions through control modules, the problem of lack of thermal runaway protection in household energy storage power supplies is solved, reducing the risk of fire and enhancing users' sense of security.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HELLO TECH ENERGY CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-28
AI Technical Summary
Existing consumer-grade energy storage power supplies for home use lack effective thermal runaway protection, resulting in a high risk of fire, causing consumers to hesitate to purchase them due to concerns about fire hazards.
Fire suppression devices are installed in the energy storage power supply, including thermal sensing wires, thermal runaway signal ports, active trigger ports, and extinguishing agent spraying units. Thermal runaway signals are detected through thermal sensing wires and sensors, and passive and active fire suppression functions are realized through control modules.
It achieves dual fire detection for home energy storage power supplies, enabling timely response to thermal runaway and the release of extinguishing agents to reduce fire risk and enhance user safety.
Smart Images
Figure CN224570079U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of household energy storage technology, and in particular to a fire-fighting device and an energy storage power supply. Background Technology
[0002] Home energy storage typically refers to large-capacity battery energy storage devices (such as lithium battery packs), often used in conjunction with rooftop photovoltaic (PV) systems. Its core function is to store excess electricity generated by PV power generation or to utilize lower-priced electricity during off-peak hours. During periods of insufficient PV power generation (such as at night or on rainy days) or peak grid electricity prices, the energy storage system can release electricity for household use, significantly improving household energy self-sufficiency, reducing electricity bills, and providing critical backup power during grid outages. These systems generally require professional installation and have capacities ranging from 5 kWh to tens of kWh, making them suitable for households with stable electricity needs, those seeking energy independence, or those needing to cope with frequent power outages.
[0003] Balcony photovoltaic-storage power supply is a miniaturized, modular, plug-and-play photovoltaic power generation and energy storage solution designed for apartment dwellers, renters, or families with limited space. It typically consists of 1-2 small photovoltaic panels (power ranging from 200W to 800W) that can be directly installed on balconies, windowsills, or exterior walls, and an integrated or separate small-capacity energy storage unit (e.g., 0.5kWh-2kWh). Its core principle is to generate electricity locally on the balcony, prioritizing power for low-power appliances (such as lighting, routers, and small appliances) on or near the balcony. Excess energy can be stored or fed into the grid (in areas where grid connection is permitted). Installation is extremely simple, requiring no modifications to the building's electrical circuits (usually just plugging it into a wall outlet), with a low investment threshold. Its main purpose is to reduce some daily electricity costs and experience green power generation.
[0004] However, both household energy storage systems and balcony photovoltaic energy storage systems can experience thermal runaway due to external factors (such as high temperatures) or internal factors (such as poor heat dissipation and poor cell uniformity). Severe thermal runaway can even lead to fires. According to a survey by the European Photovoltaic Industry Association, nearly 80% of potential users have abandoned their purchases due to concerns about fire hazards.
[0005] In related technologies, large-scale industrial and commercial energy storage systems have comprehensive fire protection systems that can promptly address various thermal runaway issues in energy storage batteries. However, for residential energy storage power supplies, considering both size and price, existing fire protection technologies for industrial and commercial energy storage cannot be applied to residential, consumer-grade energy storage power supplies. Therefore, how to add thermal runaway protection functionality to residential consumer-grade energy storage power supplies is a pressing technical problem that needs to be solved. Utility Model Content
[0006] In view of this, this application aims to at least partially solve one of the problems in the related art. Therefore, the purpose of this application is to provide a fire-fighting device and an energy storage power source.
[0007] This application provides a fire-fighting device for an energy storage power supply. The fire-fighting device includes a thermal sensing wire. The energy storage power supply includes a battery module and a control module. The thermal sensing wire is mounted on the battery module within the energy storage power supply. The fire-fighting device includes: a thermal runaway signal port, an active trigger port, and a fire extinguishing agent injection unit. The thermal runaway signal port is used to receive a thermal runaway signal generated by the thermal sensing wire when the energy storage power supply experiences thermal runaway. The active trigger port is connected to the control module and is used to receive an active trigger signal sent by the control module when it detects thermal runaway of the energy storage power supply. The fire extinguishing agent injection unit includes a fire extinguishing agent storage tank, an injection pipeline connecting to the fire extinguishing agent storage tank, and a valve disposed on the injection pipeline. The control terminal of the valve is connected to both the thermal runaway signal port and the active trigger port. The valve is configured such that when a signal is input to either port, the valve is opened to open the injection channel of the injection pipeline.
[0008] In some embodiments, the thermal runaway signal includes a smoke signal. A smoke sensor is provided inside the housing of the energy storage power supply. The detection end of the smoke sensor is arranged facing the battery module and is used to generate the smoke signal when the battery module generates smoke due to thermal runaway.
[0009] In some embodiments, the thermal runaway signal further includes an electrochemical signal, wherein an electrochemical sensor is provided within the housing of the energy storage power source, and the electrochemical sensor is triggered to generate the electrochemical signal when the energy storage power source experiences thermal runaway and produces a target flammable chemical substance.
[0010] In some embodiments, the thermal runaway signal further includes a pressure signal. A pressure sensor is provided inside the housing of the energy storage power supply. The pressure sensor is used to generate the pressure signal when the thermal runaway of the energy storage power supply causes the pressure to exceed a preset pressure threshold.
[0011] In some embodiments, the thermal runaway signal includes a smoke signal, an electrochemical signal, and a pressure signal. The energy storage power supply's housing is equipped with a smoke sensor, an electrochemical sensor, and a pressure sensor. The smoke sensor's detection end is arranged facing the battery module and is triggered to generate the smoke signal when the battery module experiences thermal runaway and produces smoke. The electrochemical sensor is triggered to generate the electrochemical signal when the energy storage power supply experiences thermal runaway and produces a target flammable chemical substance. The pressure sensor is triggered to generate the pressure signal when the energy storage power supply's thermal runaway causes the pressure to exceed a preset pressure threshold.
[0012] In some implementations, the active trigger signal includes a battery temperature signal, which is generated when the control module detects that the temperature of the battery module is greater than or equal to a first temperature threshold.
[0013] In some embodiments, the active trigger signal further includes a cell temperature signal, which is generated when the control module monitors that the temperature of at least one cell in the battery module exceeds a second temperature threshold or that the temperature rises abnormally.
[0014] In some embodiments, the amount of extinguishing agent in the extinguishing agent storage tank is positively correlated with the energy storage capacity of the energy storage power source; the housing of the fire-fighting device is made of carbon fiber reinforced polymer coated with a fire-retardant coating.
[0015] In some embodiments, the fire-fighting device includes a main body and an installation part, the installation part being integrally formed with the main body, the main body being cylindrical, the diameter of the cylinder ranging from 7cm to 9cm, the height of the cylinder ranging from 2cm to 3cm, and the length of the installation part ranging from 0.9cm to 1cm.
[0016] This application also provides an energy storage power source. The energy storage power source includes the fire-fighting device described in any of the above embodiments.
[0017] The fire suppression system in this energy storage power supply can receive the thermal runaway signal generated by the thermal sensing wire when the battery module experiences thermal runaway through the thermal runaway signal port, realizing the passive fire suppression function of the energy storage power supply. Alternatively, it can receive the active trigger signal sent by the control module when the energy storage power supply experiences thermal runaway through the active trigger port, realizing the active fire suppression function of a consumer-grade energy storage power supply. The energy storage power supply of this application can achieve dual fire detection functions through the fire suppression system, thus achieving the goal of adding thermal runaway protection to a consumer-grade energy storage power supply.
[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:
[0020] Figure 1 This is a schematic diagram of the structure of an energy storage power source according to certain embodiments of this application;
[0021] Figure 2 This is a structural schematic diagram of a fire-fighting device according to certain embodiments of this application;
[0022] Figure 3This is a structural schematic diagram of a fire-fighting device according to certain embodiments of this application;
[0023] Figure 4 This is a structural schematic diagram of a fire-fighting device according to certain embodiments of this application;
[0024] Figure 5 This is a schematic diagram of the structure of an energy storage power source according to certain embodiments of this application;
[0025] Figure 6 This is a schematic diagram of the structure of an energy storage power source according to certain embodiments of this application;
[0026] Figure 7 This is a schematic diagram of the structure of an energy storage power source according to certain embodiments of this application;
[0027] Figure 8 This is a schematic diagram of the structure of an energy storage power source according to certain embodiments of this application. Detailed Implementation
[0028] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0029] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0030] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly, referring to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or connections that allow communication between components; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0031] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.
[0032] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0033] Please see Figure 1 and Figure 2 This application provides a fire-fighting device 100 for use with an energy storage power supply 1000. Please refer to... Figure 3 The fire-fighting device 100 includes a thermal sensing wire, and the energy storage power supply 1000 includes a battery module 200 and a control module 300. A thermal sensing wire is installed on the battery module 200 within the energy storage power supply 1000. The fire-fighting device 100 includes a thermal runaway signal port 10, an active trigger port 20, and a fire extinguishing agent injection unit 30. The thermal runaway signal port 10 receives a thermal runaway signal generated by the thermal sensing wire when the energy storage power supply 1000 experiences thermal runaway. The active trigger port 20 is connected to the control module 300 and receives an active trigger signal sent by the control module 300 when it detects thermal runaway of the energy storage power supply 1000. The fire extinguishing agent injection unit 30 includes a fire extinguishing agent storage tank 31, an injection pipeline 32 connecting to the fire extinguishing agent storage tank 31, and a valve 33 located on the injection pipeline. The control terminal 331 of valve 33 is connected to both thermal runaway signal port 10 and active trigger port 20. Valve 33 is configured to open when there is a signal input at either port to open the ejection channel of ejection pipeline 32.
[0034] Specifically, the battery module 200 inside the energy storage power supply 1000 is covered with thermal sensing wires. This means that thermal sensing wires for the fire-fighting device 100 can be pre-embedded inside or on the surface of the battery module 200 inside the energy storage power supply 100, or the thermal sensing wires for the fire-fighting device 100 can be attached to the surface of the battery module 200 inside the energy storage power supply 1000. The energy storage power supply 1000 can be a household consumer-grade energy storage power supply.
[0035] The thermal runaway signal port 10 is used to receive the thermal runaway signal generated when the energy storage power supply 1000 experiences thermal runaway via the thermal sensing wire. This means that the battery module 200 inside the energy storage power supply 1000 has a thermal sensing wire embedded inside or attached to its surface. The thermal sensing wire is connected to the thermal runaway signal port 10 of the fire-fighting device 100, so that the thermal sensing wire can serve as a line to trigger the fire-fighting agent spraying unit 30 of the fire-fighting device 100 to spray the fire-fighting agent, thereby realizing the passive fire-fighting function of the energy storage power supply 1000.
[0036] For example, when the thermal sensing line detects that the internal or surface temperature of the battery module 200 has risen to a preset temperature threshold, it can trigger a thermal runaway signal to the thermal runaway signal port 10, thereby promptly triggering the fire extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray fire extinguishing agent for fire extinguishing.
[0037] In other embodiments of this application, thermal sensing wires may also be provided on components such as the control module 300, inverter, or circuit board within the energy storage power supply 1000. When the thermal sensing wires sense that the internal or surface temperature of the control module 300, inverter, or circuit board rises to a preset temperature threshold, a thermal runaway signal can be triggered to the thermal runaway signal port 10, thereby promptly triggering the fire extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray fire extinguishing agent for fire extinguishing.
[0038] The active trigger port 20 is used to receive the active trigger signal sent by the control module 300 when it detects thermal runaway of the energy storage power supply 1000. The control module 300 can be a Battery Management System (BMS), which monitors, protects, and optimizes battery performance.
[0039] Please combine Figure 4 The extinguishing agent spraying unit 30 is provided with at least one nozzle, through which the extinguishing agent can be accurately sprayed towards the thermal runaway location, or the extinguishing agent can be sprayed indiscriminately through all nozzles.
[0040] Therefore, the control module 300 can detect in real time whether the energy storage power supply 1000 has thermal runaway through its own monitoring function. The active trigger port 20 is connected to the control module 300. Therefore, when thermal runaway of the energy storage power supply 1000 is detected, an active trigger signal is sent to the active trigger port 20 in a timely manner, thereby triggering the fire extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray fire extinguishing agent for fire extinguishing.
[0041] In other words, the fire-fighting device 100 in the energy storage power supply 100 of this application can receive the thermal runaway signal generated by the thermal sensing wire when the battery module 200 experiences thermal runaway through the thermal runaway signal port 10, thereby realizing the passive fire-fighting function of the energy storage power supply 1000. It can also receive the active trigger signal sent by the control module 300 when the energy storage power supply 1000 experiences thermal runaway through the active trigger port 20, thereby realizing the active fire-fighting function of the household consumer-grade energy storage power supply 1000.
[0042] Thus, the energy storage power supply 1000 of this application can achieve dual fire detection function through the fire protection device 100, thereby achieving the purpose of adding thermal runaway protection function to the household consumer-grade energy storage power supply 1000.
[0043] Please see Figure 1 In some embodiments, the thermal runaway signal includes a smoke signal. A smoke sensor 500 is provided inside the housing 400 of the energy storage power supply 1000. The detection end of the smoke sensor 500 is arranged facing the battery module 200 and is used to generate a smoke signal when the battery module 200 generates smoke due to thermal runaway.
[0044] Specifically, the energy storage power supply 1000 of this application can also use a smoke sensor 500 installed inside its housing 400 to sense in real time whether thermal runaway occurs inside or around the battery module 200. If smoke is detected, it indicates that thermal runaway has occurred inside or around the battery module 200. Then, a smoke signal can be sent to the thermal runaway signal port 10 in a timely manner, so that the smoke signal sent by the smoke sensor 500 triggers the fire extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray fire extinguishing agent for fire extinguishing.
[0045] In other words, this application can also use the smoke sensor 500 to trigger the extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray the extinguishing agent, thereby realizing the passive fire-fighting function of the energy storage power supply 1000.
[0046] In some embodiments, the thermal runaway signal also includes an electrochemical signal. An electrochemical sensor 600 is provided inside the housing 400 of the energy storage power supply 1000. The electrochemical sensor 600 is used to generate an electrochemical signal when the energy storage power supply 1000 thermally runs away and produces a target flammable chemical substance.
[0047] Specifically, for example, the energy storage power supply 1000 of this application can also sense in real time whether thermal runaway occurs inside or around the battery module 200 by setting an electrochemical sensor 600 inside its housing 400. If thermal runaway occurs inside or around the battery module 200 and a target flammable chemical substance is generated, an electrochemical signal can be sent to the thermal runaway signal port 10 in a timely manner, so that the electrochemical signal sent by the electrochemical sensor 600 triggers the fire extinguishing agent spraying unit 30 of the fire extinguishing device 100 to spray fire extinguishing agent for fire extinguishing.
[0048] The target flammable chemical substances may include flammable gases such as CO and H2.
[0049] In detail, the working principle of the electrochemical sensor 600 is based on the electrochemical reaction of a specific gas (such as CO, H2, VOCs, etc.) or volatiles of the electrolyte. When the target combustible chemical substance (such as CO, H2, etc.) diffuses onto the surface of the working electrode (WE) of the electrochemical sensor 600, a chemical reaction involving electron transfer occurs, thereby generating an electrochemical signal, which can be, for example, a voltage signal. That is, the electrochemical sensor 600 of this application can measure the current between the working electrode and the counter electrode, convert it into a voltage signal, and then send this voltage signal as a thermal runaway signal to the thermal runaway signal port 10, triggering the fire extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray fire extinguishing agent for fire extinguishing.
[0050] In other words, this application can also use an electrochemical sensor 600 to trigger the extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray the extinguishing agent, thereby realizing the passive fire-fighting function of the energy storage power supply 1000.
[0051] In some embodiments, the thermal runaway signal also includes a pressure signal. A pressure sensor 700 is provided inside the housing 400 of the energy storage power supply 1000. The pressure sensor 700 is used to generate a pressure signal when the energy storage power supply 1000 experiences thermal runaway and the pressure exceeds a preset pressure threshold.
[0052] Specifically, for example, the energy storage power supply 1000 of this application can use a pressure sensor 700 installed inside its housing 400 to sense in real time whether thermal runaway occurs around the battery module 200. If thermal runaway is detected around the battery module 200 and the internal pressure of the housing 400 exceeds a preset pressure threshold, a pressure signal can be sent to the thermal runaway signal port 10 in a timely manner, so that the pressure signal sent by the pressure sensor 700 triggers the fire extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray fire extinguishing agent for fire extinguishing.
[0053] The preset air pressure threshold can be, for example, 200 kPa, 201 kPa, 202 kPa, 203 kPa, 204 kPa, 205 kPa, 206 kPa, 207 kPa, 208 kPa or 209 kPa, and there is no restriction here.
[0054] In detail, the working principle of the pressure sensor 700 is as follows: During thermal runaway, the gases generated (such as CO, H2, VOCs, etc.) or the air expansion caused by high temperature will significantly change the ambient air pressure. Therefore, this application can use the pressure sensor 700 to monitor the pressure changes in a closed or semi-closed space and thus emit a pressure signal, which is then sent as a thermal runaway signal to the thermal runaway signal port 10 to trigger the extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray extinguishing agent for fire extinguishing.
[0055] In other words, this application can also use the air pressure sensor 700 to trigger the fire extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray the fire extinguishing agent, thereby realizing the passive fire-fighting function of the energy storage power supply 1000.
[0056] It should be noted that the fire-fighting device 100 of this application can additionally detect whether the energy storage power supply 1000 has experienced thermal runaway through any one or two of the smoke sensor 500, electrochemical sensor 600 and pressure sensor 700. Then, it can receive the thermal runaway signal sent by any one or two of the above-mentioned detection devices through the thermal runaway signal port to trigger the extinguishing agent in the extinguishing agent spraying unit 30 to spray the extinguishing agent, thereby realizing the passive fire-fighting function of the energy storage power supply 1000.
[0057] In addition, the fire-fighting device 100 of this application can additionally detect whether the energy storage power supply 1000 has thermal runaway by using any one or two of the smoke sensor 500, electrochemical sensor 600 and pressure sensor 700 in conjunction with the thermal sensing line. Then, by receiving the thermal runaway signal emitted by any one or two of the above-mentioned detection devices and the thermal sensing line through the thermal runaway signal port, the device can trigger the extinguishing agent to be sprayed in the extinguishing agent spraying unit 30, thereby realizing the passive fire-fighting function of the energy storage power supply 1000.
[0058] In some embodiments, the thermal runaway signal includes a smoke signal, an electrochemical signal, and a pressure signal. The energy storage power supply housing includes a smoke sensor 500, an electrochemical sensor 600, and a pressure sensor 700. The smoke sensor 500 is positioned with its detection end facing the battery module 200 and is triggered to generate a smoke signal when the battery module 200 experiences thermal runaway and produces smoke. The electrochemical sensor 600 is triggered to generate an electrochemical signal when the energy storage power supply 1000 experiences thermal runaway and produces a target flammable chemical substance. The pressure sensor 700 is triggered to generate a pressure signal when the energy storage power supply 1000 experiences thermal runaway and the pressure exceeds a preset pressure threshold.
[0059] Specifically, the working principles of the smoke sensor 500, the electrochemical sensor 600, and the pressure sensor 700 are as described above and will not be repeated here.
[0060] That is, the energy storage power supply 1000 of this application can be equipped with three thermal runaway detection instruments at the same time: a smoke sensor 500, an electrochemical sensor 600, and a pressure sensor 700. Thus, the fire extinguishing agent in the fire extinguishing agent spraying unit 30 can be triggered by at least one thermal runaway signal emitted by the three thermal runaway detection instruments, thereby realizing the passive fire protection function of the energy storage power supply 1000.
[0061] In addition, the fire-fighting device 100 of this application can additionally detect whether the energy storage power supply 1000 has thermal runaway by using three detection devices among the smoke sensor 500, electrochemical sensor 600 and air pressure sensor 700 in conjunction with the thermal sensing line. It can receive the thermal runaway signal emitted by the above detection devices and the thermal sensing line through the thermal runaway signal port to trigger the fire extinguishing agent in the fire extinguishing agent spraying unit 30 to spray, thereby realizing the passive fire-fighting function of the energy storage power supply 1000.
[0062] In some implementations, the active trigger signal includes a battery temperature signal, which is generated when the control module 300 monitors that the temperature of the battery module 200 is greater than or equal to a first temperature threshold.
[0063] Specifically, the first temperature threshold can be, for example, 80 degrees Celsius, 85 degrees Celsius, 86 degrees Celsius, 88 degrees Celsius, 89 degrees Celsius, 90 degrees Celsius, 92 degrees Celsius, 93 degrees Celsius, 95 degrees Celsius or 100 degrees Celsius, without any restrictions.
[0064] The first temperature threshold can be set to different values depending on the type of battery in the battery module 200. For example, when the battery in the battery module 200 is a lithium iron phosphate battery, the first temperature threshold can be set to 100 degrees Celsius. When the battery in the battery module 200 is a ternary lithium battery, the first temperature threshold can be set to 80 degrees Celsius.
[0065] Specifically, for example, an NTC temperature sensor can be placed on the positive and negative copper busbars of the battery cell in the battery module 200 for temperature detection. The control module 300 can be electrically connected to the NTC temperature sensor. The control module 300 can periodically read the NTC signal and process the data through algorithms (such as filtering and calibration) to generate a reliable battery temperature signal. That is, the control module 300 of this application can use the NTC temperature sensor to monitor the temperature on the positive and negative copper busbars of the battery cell in the battery module 200. When the temperature is greater than or equal to a first temperature threshold, the control module 300 sends a battery temperature signal as an active trigger signal to the active trigger port 20, which promptly triggers the fire extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray fire extinguishing agent for fire extinguishing, thereby realizing the active fire-fighting function of the energy storage power supply 1000.
[0066] Thus, the energy storage power supply 1000 of this application can generate a battery temperature signal as an active trigger signal and send it to the active trigger port 20 when the control module 300 monitors that the temperature of the battery module 200 is greater than or equal to the first temperature threshold. This will trigger the fire extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray fire extinguishing agent for fire extinguishing, thereby realizing the active fire-fighting function of the energy storage power supply 1000.
[0067] In some implementations, the active trigger signal also includes a cell temperature signal, which is generated when the control module 300 monitors that the temperature of at least one cell in the battery module 200 exceeds a second temperature threshold or that the temperature rises abnormally.
[0068] Understandably, since a short circuit in the battery cell can cause thermal failure such as a rapid increase in battery cell temperature, the battery cell temperature signal detected by the control module 300 can be used as an active trigger signal to trigger the fire extinguishing agent spraying unit 30 of the fire extinguishing device 100 to spray fire extinguishing agent for fire extinguishing, thereby realizing the active fire extinguishing function of the energy storage power supply 1000.
[0069] Since thermal runaway in battery module 200 is caused by a chemical chain reaction inside the cell (such as membrane melting and electrolyte decomposition), the local temperature can instantly exceed 150°C. The temperature sensor that directly contacts the cell surface can capture the earliest abnormal heating, which then spreads to the outside of the cell in battery module 200. Therefore, the second temperature threshold is higher than the first temperature threshold, for example, the second temperature threshold is 10 degrees Celsius or 30 degrees Celsius higher than the first temperature threshold.
[0070] Specifically, the second temperature threshold can be, for example, 120 degrees Celsius, 130 degrees Celsius, 150 degrees Celsius, 160 degrees Celsius, 170 degrees Celsius, 180 degrees Celsius, 190 degrees Celsius, 200 degrees Celsius, 210 degrees Celsius, 220 degrees Celsius, 230 degrees Celsius, or 240 degrees Celsius, and there is no restriction here.
[0071] The second temperature threshold can be set to different values depending on the type of battery in the battery module 200. For example, when the battery in the battery module 200 is a lithium iron phosphate battery, the second temperature threshold can be set to 130 degrees Celsius. When the battery in the battery module 200 is a ternary lithium battery, the second temperature threshold can be set to 100 degrees Celsius.
[0072] The active fire suppression method of this application can also detect the temperature of each cell in the battery module 200. If an abnormal temperature is detected in one or more cells, such as exceeding a threshold or an abnormal temperature rise causing a rapid increase in cell temperature within a short period of time, the system can detect the abnormal temperature.
[0073] Alternatively, when a short circuit occurs in a cell of the battery module 200, it will cause local heating. Temperature sensors (such as NTC, thermocouples, and fiber optic sensors) can detect the temperature signal of each cell when the temperature exceeds the second temperature threshold or when the temperature rises abnormally. The control module 300 triggers the fire extinguishing agent spraying unit 30 of the fire-fighting device 100 to spray fire extinguishing agent to extinguish the fire, thereby realizing the active fire-fighting function of the energy storage power supply 1000.
[0074] Thus, in the energy storage power supply 1000 of this application, the control device 300 can trigger the fire extinguishing agent spraying unit 30 of the fire extinguishing device 100 to spray fire extinguishing agent according to the short circuit signal of the battery cell, thereby realizing the active fire extinguishing function of the energy storage power supply 1000.
[0075] In some embodiments, the amount of extinguishing agent in the extinguishing agent storage tank 31 is positively correlated with the energy storage capacity of the energy storage power supply 1000, and the shell of the fire-fighting device 100 is made of carbon fiber reinforced polymer coated with a fire-retardant coating.
[0076] That is, the larger the energy storage capacity of the energy storage power source 1000, the more extinguishing agent is in the fire extinguishing agent storage tank 31, and the smaller the energy storage capacity of the energy storage power source 1000, the less extinguishing agent is in the fire extinguishing agent storage tank 31. The two are positively correlated.
[0077] Thus, the extinguishing dose of the fire-fighting device 100 of this application can be set according to the energy storage power supply 1000 with different energy storage capacities, thereby adapting to the fire-fighting needs of different models of energy storage power supply 1000.
[0078] In addition, the housing of the fire-fighting device 100 of this application is made of carbon fiber reinforced polymer coated with a fire-retardant coating. The carbon fiber reinforced polymer is 30% lighter than aluminum and has a higher strength than steel. The fire-retardant coating (such as an intumescent coating) of the carbon fiber reinforced polymer can meet the UL 94 standard, so that the fire-fighting device 100 of this application can play a fire-resistant role while being lightweight. This is conducive to the lightweighting of the fire-fighting device 100 and makes the household consumer-grade energy storage power supply 1000 with the fire-fighting device 100 lighter.
[0079] Please see Figure 3 and Figure 4 In some embodiments, the fire-fighting device 100 includes a main body 40 and an installation part 50. The installation part 50 is integrally formed with the main body 40. The main body 40 is cylindrical with a diameter ranging from 7cm to 9cm and a height ranging from 2cm to 3cm. The length of the installation part 50 ranges from 0.9cm to 1cm.
[0080] Specifically, the fire-fighting device 100 can be fixedly installed in the energy storage power supply 1000 through the installation part 50.
[0081] That is to say, such as Figure 4 As shown, when an installation part 50 is provided on each side of the fire-fighting device 100, the longest length of the fire-fighting device 100 made of the main body part 40 and the installation part 50 in the energy storage power supply 1000 of this application is 11cm, the shortest length can be 8.8cm, the maximum height is 3cm, and the minimum height can be 2cm. The fire-fighting device 100 occupies a small volume, which is conducive to the miniaturization of the fire-fighting device 100, so that the fire-fighting device 100 of this application can be applied to small household consumer-grade energy storage power supply 1000.
[0082] In some implementations, the thermal runaway signal port 10 and the active trigger port 20 are respectively located on two different sides of the fire-fighting device 100. This makes it easier for the two ports of the fire-fighting device 100 to be correctly connected to the corresponding lines, and the installation is faster.
[0083] Alternatively, in some embodiments, the thermal runaway signal port 10 and the active trigger port 20 are located on the same side of the fire-fighting device 100, which facilitates the layout of the fire-fighting device 100 in the energy storage power supply 1000 and makes the internal connection circuit planning of the energy storage power supply 1000 more reasonable.
[0084] In some implementations, the extinguishing agent is an aerosol extinguishing agent.
[0085] Aerosol fire extinguishing agents are used for fire suppression and have advantages such as small volume, storage at normal pressure, no need to lay pipelines, fast fire suppression speed, no dead zones, non-toxicity, non-corrosiveness, and no damage to the atmospheric ozone layer.
[0086] In other words, the fire extinguishing agent storage tank of the fire extinguishing agent spraying unit 30 in the fire-fighting device 100 of this application can store aerosol fire extinguishing agent, which can achieve more efficient and environmentally friendly fire extinguishing of the battery module inside the energy storage power supply 1000.
[0087] Please refer to the following: Figures 1 to 8 This application also provides an energy storage power supply 1000. The energy storage power supply 1000 includes the fire-fighting device 100 described in any of the above embodiments.
[0088] Among them, such as Figures 5 to 7 As shown, the battery module 200 in the energy storage power supply 1000 of this application may include only one battery pack. In this case, there is one fire-fighting device 100, which is installed on one side of the battery pack.
[0089] For details, please refer to Figure 3 Firefighting device 100 can be passed Figure 3 The mounting holes on both sides of the device are installed on one side of the battery pack in the battery module 200.
[0090] The fire-fighting device 100 also includes a connecting part, which is located on the main body 40, and the heat-sensing wire 15 passes through the connecting part to extend into the main body 40.
[0091] The BMS module of the energy storage power supply 1000 can be connected to the main body 40 via a signal line. Optionally, the communication connection can include wired communication connection and wireless communication connection, and the wireless communication connection includes, but is not limited to, Bluetooth communication, Wi-Fi communication, mobile network communication, etc.
[0092] like Figure 8 As shown, the battery module 200 may also include multiple battery packs, namely one main battery pack and two power supply packs. In this case, the fire-fighting device 100 may also be only one, with the fire-fighting device 100 located on one side of the main battery pack or the power supply pack.
[0093] For details, please refer to Figure 3 Firefighting device 100 can be passed Figure 3 The mounting holes on both sides of the device are installed on one side of the main power pack.
[0094] In other words, the fire-fighting device 100 in the energy storage power supply 100 of this application can receive the thermal runaway signal generated by the thermal sensing wire when the battery module 200 experiences thermal runaway through the thermal runaway signal port 10, thereby realizing the passive fire-fighting function of the energy storage power supply 1000. It can also receive the active trigger signal sent by the control module 300 when the energy storage power supply 1000 experiences thermal runaway through the active trigger port 20, thereby realizing the active fire-fighting function of the household consumer-grade energy storage power supply 1000.
[0095] Thus, the energy storage power supply 1000 of this application can achieve dual fire detection function through the fire protection device 100, thereby achieving the purpose of adding thermal runaway protection function to the household consumer-grade energy storage power supply 1000.
[0096] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A fire-fighting device for an energy storage power source, characterized in that, The fire-fighting device includes a thermal sensing wire, the energy storage power supply includes a battery module and a control module, and the thermal sensing wire is covered on the battery module inside the energy storage power supply. The fire-fighting device includes: Thermal runaway signal port, the thermal runaway signal port is used to receive the thermal runaway signal generated by the thermal sensing wire when the energy storage power supply experiences thermal runaway; An active trigger port, connected to the control module, is used to receive an active trigger signal sent by the control module when it detects thermal runaway of the energy storage power supply; and The extinguishing agent spraying unit includes an extinguishing agent storage tank, a spraying pipeline connected to the extinguishing agent storage tank, and a valve provided on the spraying pipeline; The valve's control terminal is connected to both the thermal runaway signal port and the active trigger port. The valve is configured such that when a signal is input to either port, the valve is opened to activate the eruption channel of the eruption pipeline.
2. The fire-fighting device according to claim 1, characterized in that, The thermal runaway signal includes a smoke signal. A smoke sensor is provided inside the housing of the energy storage power supply. The detection end of the smoke sensor is arranged facing the battery module and is used to generate the smoke signal when the battery module generates smoke due to thermal runaway.
3. The fire-fighting device according to claim 1 or 2, characterized in that, The thermal runaway signal also includes an electrochemical signal. An electrochemical sensor is provided inside the housing of the energy storage power supply. The electrochemical sensor is used to generate the electrochemical signal when the energy storage power supply generates a target flammable chemical substance during thermal runaway.
4. The fire-fighting device according to claim 1 or 2, characterized in that, The thermal runaway signal also includes a pressure signal. The energy storage power supply is equipped with a pressure sensor inside its housing. The pressure sensor is used to generate the pressure signal when the energy storage power supply experiences thermal runaway and the pressure exceeds a preset pressure threshold.
5. The fire-fighting device according to claim 1, characterized in that, The thermal runaway signals include smoke signals, electrochemical signals, and pressure signals. The energy storage power supply's casing is equipped with a smoke sensor, an electrochemical sensor, and a pressure sensor. The detection end of the smoke sensor is arranged towards the battery module, and is used to generate the smoke signal when the battery module generates smoke due to thermal runaway. The electrochemical sensor is used to generate the electrochemical signal when the energy storage power source thermally runs away and produces a target flammable chemical substance. and The pressure sensor is used to generate the pressure signal when the pressure exceeds a preset pressure threshold due to thermal runaway of the energy storage power supply.
6. The fire-fighting device according to claim 1, characterized in that, The active trigger signal includes a battery temperature signal, which is generated when the control module detects that the temperature of the battery module is greater than or equal to a first temperature threshold.
7. The fire-fighting device according to claim 1 or 6, characterized in that, The active trigger signal also includes a cell temperature signal, which is generated when the control module detects that the temperature of at least one cell in the battery module exceeds a second temperature threshold or that the temperature rises abnormally.
8. The fire-fighting device according to claim 1, characterized in that, The amount of extinguishing agent in the extinguishing agent storage tank is positively correlated with the energy storage capacity of the energy storage power source; the shell of the fire-fighting device is made of carbon fiber reinforced polymer coated with a fire-retardant coating.
9. The fire-fighting device according to claim 1, characterized in that, The fire-fighting device includes a main body and an installation part. The installation part is integrally formed with the main body. The main body is cylindrical with a diameter ranging from 7cm to 9cm and a height ranging from 2cm to 3cm. The length of the installation part ranges from 0.9cm to 1cm.
10. An energy storage power source, characterized in that, The energy storage power source includes the fire-fighting device as described in any one of claims 1 to 9.