Battery pack, new energy equipment, fire extinguishing method and system for the battery pack, and readable storage medium

Abstract

A battery pack, a new energy device, a fire-extinguishing method and system for a battery pack, and a readable storage medium, which relate to the technical field of new energy batteries and are used to improve the reliability of battery packs during use. The battery pack comprises a case assembly (1), a cell assembly (2), a first-stage fire-extinguishing assembly (3) and a second-stage fire-extinguishing assembly (4). The case assembly (1) comprises an accommodating cavity (11) and a fire-extinguishing agent injection port (12) in communication with the accommodating cavity (11). The cell assembly (2) is mounted in the accommodating cavity (11). The first-stage fire-extinguishing assembly (3) is mounted in the accommodating cavity (11), and the first-stage fire-extinguishing assembly (3) is configured to extinguish a fire on the cell assembly (2). The second-stage fire-extinguishing assembly (4) is mounted outside the case assembly (1) and is in communication with the fire-extinguishing agent injection port (12), and the second-stage fire-extinguishing assembly (4) is configured to spray a fire-extinguishing agent onto the cell assembly (2) in the accommodating cavity (11). In the technical solution, a two-stage fire-extinguishing assembly is used, thus improving the fire-extinguishing effect. In addition, the battery pack can adapt to battery systems of different sizes, with a high level of universality, thereby greatly reducing research and development and design costs.

Description

Battery packs, new energy equipment, battery pack fire extinguishing methods, systems, and readable storage media

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims priority to CN application No. 202510134717.3 filed on February 6, 2025, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure relates to the field of new energy battery technology, specifically to a battery pack, new energy equipment, battery pack fire extinguishing method, system, and readable storage medium. Background Technology

[0004] With the rapid development of the new energy industry, accidents occur frequently during battery use and production, and battery safety has always been a key concern in the industry.

[0005] The inventors have discovered that the existing technology has at least the following problems: during the charging and discharging process of the battery system, once the battery cell experiences thermal runaway, it will quickly spread to the entire battery system, which may cause power outages and shutdowns, or even fires and explosions, resulting in significant economic losses and serious personal injuries. Summary of the Invention

[0006] This disclosure provides a battery pack, a new energy device, a battery pack fire extinguishing method, a system, and a readable storage medium to improve the reliability of battery pack use.

[0007] This disclosure provides a battery pack, including:

[0008] The housing assembly includes a receiving cavity and an extinguishing agent injection port communicating with the receiving cavity;

[0009] The battery cell assembly is installed in the accommodating cavity;

[0010] A first-stage fire extinguishing assembly is installed in the accommodating cavity, and the first-stage fire extinguishing assembly is configured to extinguish the fire in the battery cell assembly; and

[0011] The second-stage fire extinguishing assembly is installed outside the housing assembly and is connected to the fire extinguishing agent injection port. The second-stage fire extinguishing assembly is configured to spray fire extinguishing agent into the battery cell assembly inside the accommodating cavity.

[0012] In some embodiments, the battery cell assembly includes at least one battery cell, and the first-stage fire extinguishing assembly includes at least one fire extinguishing disc, with the battery cell and the fire extinguishing disc arranged in a one-to-one correspondence.

[0013] In some embodiments, each of the battery cells includes an explosion-proof valve facing the inner wall of the housing assembly; the fire extinguishing disc is fixed to the inner wall of the housing assembly and faces the explosion-proof valve to spray fire extinguishing agent onto the explosion-proof valve.

[0014] In some embodiments, the fire extinguishing discs are arranged in rows at the bottom of the inner wall of the housing assembly.

[0015] In some embodiments, there are multiple extinguishing agent injection ports, and each extinguishing agent injection port is distributed in a dispersed manner.

[0016] In some embodiments, each of the extinguishing agent injection ports is provided with a corresponding second-stage extinguishing component.

[0017] In some embodiments, the battery pack further includes:

[0018] A battery management system is installed on one side of the battery cell assembly. The battery management system is electrically connected to the second-stage fire extinguishing assembly to control the operation and shutdown of the second-stage fire extinguishing assembly.

[0019] In some embodiments, the second-stage fire suppression component includes:

[0020] A fire extinguishing agent container for holding fire extinguishing agent; the fire extinguishing agent container includes a fire extinguishing agent outlet.

[0021] Pipeline, connected to the extinguishing agent outlet of the extinguishing agent container; and

[0022] A switching valve is installed in the pipeline to control the opening and closing of the pipeline; the battery management system is electrically connected to the switching valve to control the opening and closing state of the switching valve.

[0023] In some embodiments, the switching valve includes:

[0024] A manual control valve is installed in the pipeline; and

[0025] An automatic control valve is arranged side by side with the manual control valve and is also arranged in the pipeline;

[0026] When either the manual control valve or the automatic control valve is turned on, the pipeline is connected.

[0027] In some embodiments, the second-stage fire suppression assembly further includes:

[0028] A check valve is installed in the pipeline to prevent the extinguishing agent in the extinguishing agent container from flowing back.

[0029] In some embodiments, the battery pack further includes:

[0030] A smoke detector is installed in the enclosure assembly.

[0031] This disclosure also provides a new energy device, including a battery pack provided by any of the technical solutions disclosed herein.

[0032] This disclosure also provides a battery pack fire extinguishing method, including the following steps:

[0033] When the temperature at the thermal runaway location within the battery pack provided by any of the technical solutions of this disclosure exceeds a first preset threshold, the first-stage fire extinguishing component is automatically activated to spray fire extinguishing agent toward the thermal runaway location;

[0034] When the temperature inside the battery pack exceeds a second set threshold, the second-stage fire extinguishing component is activated to spray fire extinguishing agent into the housing component via the fire extinguishing agent injection port; wherein the second set threshold is greater than the first set threshold.

[0035] In some embodiments, the thermal runaway location corresponds to one or more of the fire extinguishing discs of the first-stage fire extinguishing assembly.

[0036] In some embodiments, a battery management system is used to obtain the temperature inside the battery pack.

[0037] This disclosure also provides a battery pack fire suppression system, including:

[0038] Memory; and

[0039] A processor coupled to the memory is configured to execute a battery pack fire extinguishing method as provided in any of the technical solutions of this disclosure, based on instructions stored in the memory.

[0040] This disclosure also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the battery pack fire extinguishing method provided by any of the technical solutions of this disclosure.

[0041] The battery pack provided by the above technical solution can be applied not only in the field of new energy power batteries but also in the field of energy storage technology. This technical solution achieves precise and rapid fire suppression by setting up a first-stage and a second-stage fire suppression system. Since the first-stage fire suppression system targets individual or a few cells, while the second-stage system targets the entire cell assembly, depending on the size of the fire, the first-stage system can extinguish the fire individually or both stages can work together. This effectively reduces the damage to surrounding cells of the thermally runaway cell during fire suppression; the use of this dual-stage fire suppression system improves the fire suppression effect. Furthermore, the battery pack is applicable to battery systems of different sizes, has a high degree of versatility, and can significantly reduce research and development costs. Attached Figure Description

[0042] Figure 1 is an exploded structural diagram of a battery pack provided in some embodiments of this disclosure.

[0043] Figure 2 is a schematic diagram of the three-dimensional structure of the battery pack housing provided in some embodiments of this disclosure.

[0044] Figure 3 is a schematic diagram of a battery pack fire extinguishing method provided in some embodiments of this disclosure.

[0045] Figure 4 is a schematic diagram of the second-stage fire extinguishing logic of a battery pack fire extinguishing method provided in some embodiments of this disclosure.

[0046] Reference numerals: 1. Housing assembly; 2. Battery cell assembly; 3. First-stage fire extinguishing assembly; 4. Second-stage fire extinguishing assembly; 5. Battery management system; 6. Smoke detector; 7. MSD; 11. Containing cavity; 12. Extinguishing agent injection port; 13. Housing; 14. Housing cover; 21. Battery cell; 211. Explosion-proof valve; 41. Manual on / off valve; 42. Automatic on / off valve. Detailed Implementation

[0047] The technical solutions provided in this disclosure will be described in more detail below with reference to Figures 1 to 4. The descriptions of exemplary embodiments are merely illustrative and are in no way intended to limit this disclosure or its application or use. This disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make this disclosure thorough and complete, and to fully express the scope of this disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0048] The terms “first,” “second,” and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as “including” or “contains” mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0049] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0050] All terms used in this disclosure, including technical or scientific terms, have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0051] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment shall be considered part of the specification.

[0052] The dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Common structural elements or elements of the same kind are given the same reference numerals in the various drawings, and repeated descriptions of them are omitted where appropriate.

[0053] The inventors discovered through research that lithium-ion battery fires are caused by thermal runaway of individual cells. From the initial induction of thermal runaway to final combustion, lithium-ion batteries are accompanied by the release of flammable gases, electrolyte and reactive gases, and the thermal decomposition of the electrolyte, generating large amounts of smoke and heat. In related technologies, fire extinguishing of the battery system is done externally, specifically by spraying extinguishing agents outside the battery pack. However, due to the protection of the battery casing, it is difficult for the extinguishing agent to penetrate the battery pack and contact the cells, resulting in low extinguishing efficiency. The solutions in some embodiments of this disclosure can effectively improve extinguishing efficiency and minimize damage to the cells.

[0054] Figure 1 is an exploded structural diagram of a battery pack provided in some embodiments of this disclosure. Figure 2 is a three-dimensional structural diagram of the battery pack housing provided in some embodiments of this disclosure.

[0055] Referring to Figures 1 and 2, some embodiments of this disclosure provide a battery pack, including a housing assembly 1, a cell assembly 2, a first-stage fire extinguishing assembly 3, and a second-stage fire extinguishing assembly 4 (see Figure 4). The housing assembly 1 includes a receiving cavity 11 and a fire extinguishing agent injection port 12 communicating with the receiving cavity 11. The cell assembly 2 is installed in the receiving cavity 11. The first-stage fire extinguishing assembly 3 is installed in the receiving cavity 11 and is configured to extinguish the fire in the cell assembly 2. The second-stage fire extinguishing assembly 4 is installed outside the housing assembly 1 and communicates with the fire extinguishing agent injection port 12. The second-stage fire extinguishing assembly 4 is configured to spray fire extinguishing agent into the cell assembly 2 within the receiving cavity 11.

[0056] The enclosure assembly 1 includes an enclosure 13 and an enclosure lid 14. The enclosure 13 has a receiving cavity 11, and the enclosure lid 14 is openable and closable at the opening of the receiving cavity 11. The enclosure 13 and the enclosure lid 14 are detachably fixedly connected, specifically by means of bolts, clips, etc., and the enclosure 13 and the enclosure lid 14 are sealed after connection.

[0057] The battery cell assembly 2 includes one or more rows of battery cells 21, with their largest sides facing each other. Each battery cell 21 includes an explosion-proof valve 211. The explosion-proof valve 211 of each battery cell 21 faces the side wall of the housing 13. In some embodiments, each battery cell 21 includes an explosion-proof valve 211 facing the inner wall of the housing assembly 1; a fire extinguishing disc is fixed to the inner wall of the housing assembly 1 and faces the explosion-proof valve 211 to spray fire extinguishing agent onto the explosion-proof valve 211. The battery cells 21 can be lithium batteries, which have high energy density, long lifespan, fast charging, high environmental performance and temperature adaptability, and can be reused multiple times.

[0058] The first-stage fire extinguishing assembly 3 is used to extinguish fires on individual battery cells 21. The first-stage fire extinguishing assembly 3 may include multiple fire extinguishing discs, each corresponding to one battery cell 21. Specifically, the fire extinguishing discs may be perfluoroacetone fire extinguishing discs, which occupy little space and are easy to use. Battery cells 21 and fire extinguishing discs are arranged in a one-to-one correspondence. One fire extinguishing disc is placed directly in front of the explosion-proof valve 211 of each battery cell 21, and the fire extinguishing discs are attached to the housing 13 with adhesive. The fire extinguishing principle of the fire extinguishing discs is as follows: when the temperature around the fire extinguishing disc reaches a specific temperature or an open flame is generated, the fire extinguishing function will be automatically triggered, rapidly spraying fire extinguishing agent towards the battery cell 21 that is experiencing thermal runaway, to prevent further heat spread from the battery cell 21. After the burning material is sprayed out of the explosion-proof valve 211 of each battery cell 21, the fire extinguishing disc corresponding to the explosion-proof valve 211 will be automatically activated. The fire extinguishing disc will spray fire extinguishing agent onto the explosion-proof valve 211 of the battery cell 21 to extinguish the flame of the battery cell 21, so that the thermally runaway battery cell 21 can be restored to the normal temperature, and other battery cells 21 adjacent to the thermally runaway battery cell 21 will be affected and thus also experience thermal runaway.

[0059] If multiple cells 21 experience thermal runaway simultaneously, the fire extinguishing disc corresponding to each thermally runaway cell 21 will automatically activate.

[0060] If the fire extinguishing effect of the fire extinguishing discs is insufficient and the internal temperature of the housing assembly 1 continues to rise, the second-stage fire extinguishing assembly 4 will be activated to provide secondary fire suppression for the battery cell assembly 2. The fire extinguishing principle of the second-stage fire extinguishing assembly 4 is as follows: When the first-stage fire extinguishing assembly 3 is triggered, if the temperature around the thermally runaway battery cell 21 does not decrease significantly or still shows an upward trend, the battery management system 5, described later, sends a fire extinguishing command to the second-stage fire extinguishing assembly 4, controlling the connection of the pipeline of the second-stage fire extinguishing assembly 4. The fire extinguishing agent is immediately sprayed into the battery pack through the fire extinguishing agent injection port at the location of the thermal runaway battery cell 21, rapidly and effectively reducing the temperature inside the battery pack and reducing or even eliminating the phenomenon of further combustion expansion and heat spread of the thermally runaway battery cell 21.

[0061] The above technical solution employs a two-stage fire suppression system: a first-stage fire suppression component 3 and a second-stage fire suppression component 4. When a single battery cell 21 experiences thermal runaway, the first-stage fire suppression component 3 initiates the fire suppression. If the first-stage fire suppression component 3 is insufficient, the second-stage fire suppression component 4 continues to participate. This two-stage fire suppression effectively increases the success rate of fire suppression, improving the reliability and safety of the battery pack. When the first-stage fire suppression component 3 can effectively extinguish the fire, the second-stage fire suppression component 4 does not need to participate. The first-stage fire suppression component 3 can precisely control the fire suppression location and effectively reduce the risk of thermal spread and explosion after thermal runaway of a single battery cell 21. Both the first-stage fire suppression component 3 and the second-stage fire suppression component 4 spray extinguishing agent into the interior of the housing component 1, allowing the extinguishing agent to directly reach the ignition point, resulting in very high fire suppression efficiency.

[0062] In some embodiments, fire extinguishing discs are arranged in rows at the bottom of the inner wall of the housing assembly 1.

[0063] In some embodiments, there are multiple extinguishing agent injection ports 12, which are distributed in a dispersed manner. Taking two extinguishing agent injection ports 12 as an example, the two extinguishing agent injection ports 12 are distributed in a dispersed manner, so that the extinguishing agent can be sprayed into the housing assembly 1 from different positions to improve the extinguishing efficiency.

[0064] In some embodiments, each extinguishing agent injection port 12 corresponds to a second-stage extinguishing component 4. Each second-stage extinguishing component 4 can be activated individually or simultaneously. Each second-stage extinguishing component 4 is equipped with a separate extinguishing agent injection port 12, allowing the extinguishing agent to be delivered to the interior of the housing component 1 from different locations for more efficient and targeted fire suppression.

[0065] In some embodiments, the battery pack further includes a battery management system 5, which is installed on one side of the cell assembly 2 and is electrically connected to the second-stage fire extinguishing assembly 4 to control the operation and shutdown of the second-stage fire extinguishing assembly 4.

[0066] The battery management system 5, smoke detector 6, and MSD (manual maintenance switch) are located at the front of the battery pack, while the fire extinguishing agent injection port is located at the rear. In this article, the left side of Figure 1 is considered the front, and the right side is considered the rear. The battery management system 5 is, for example, a BMS (Battery Management System). The BMS is an important system for monitoring and managing the performance of the battery pack. The BMS can improve the safety, efficiency, and lifespan of the battery pack. The main functions of the battery management system 5 include battery monitoring, charge and discharge control, and equalization management. The BMS monitors the voltage, current, temperature, state of charge, and remaining charge (SOC) of the battery pack in real time to ensure that the battery pack operates within a safe range. The BMS controls the charging and discharging process of the battery pack, including the adjustment of charging power and the prevention of overcharging, over-discharging, and overheating. The BMS also performs charge balancing on each cell 21 of the cell assembly 2 to ensure that the charge of all cells 21 is consistent, thereby improving the overall performance and lifespan of the battery pack. The BMS can also perform fault detection and alarm. When an abnormality is detected in the battery pack, such as a short circuit, overcurrent, or overtemperature, an alarm signal is given through the alarm system.

[0067] In some embodiments, the second-stage fire extinguishing assembly 4 includes an extinguishing agent container (not shown), a pipeline (not shown), and a switching valve (not shown). The extinguishing agent container is used to hold the extinguishing agent, such as an extinguishing agent canister; the extinguishing agent container includes an extinguishing agent outlet. The pipeline is connected to the extinguishing agent outlet of the extinguishing agent container. The switching valve is installed on the pipeline to control the opening and closing of the pipeline; the battery management system 5 is electrically connected to the switching valve to control the opening and closing state of the switching valve.

[0068] The second-stage fire extinguishing component 4 is fixedly connected to the housing 13, or the second-stage fire extinguishing component 4 is fixed to the base, frame, or other components of the new energy equipment.

[0069] The switching valves include a manual switching valve 41 and an automatic switching valve 42, which are connected in parallel, i.e., located in two parallel branches. When either the manual switching valve 41 or the automatic switching valve 42 is turned on, the pipeline of the second-stage fire extinguishing assembly 4 is also turned on, allowing the fire extinguishing agent to be sprayed into the housing assembly 1.

[0070] The aforementioned technical solution incorporates both a manual on / off valve 41 and an automatic on / off valve 42, arranged side-by-side. This combination leverages the advantages of both, enhancing system flexibility, safety, and user experience. This hybrid operation mode allows users to adjust and manage the new energy equipment as needed during operation, better meeting diverse scenarios and requirements. The manual switch allows for on-demand control, suitable for situations requiring manual intervention or adjustment. When manual intervention is deemed necessary for secondary fire suppression, the manual switch can be directly activated. The automatic switch automatically opens and closes based on set conditions, suitable for stable operation. If the automatic switch malfunctions, the manual switch serves as a backup control option, ensuring the safe and normal operation of the secondary fire suppression component 4 and reducing or even eliminating the risk of fire suppression failure due to automatic control malfunction. In case of abnormal situations or safety hazards, the manual switch can be used immediately for emergency fire suppression, reducing the likelihood of accidents. In practical use, users can freely choose between manual or automatic modes to meet different needs and habits, enhancing the flexibility of the secondary fire suppression component 4. Even in cases of power outages or other abnormalities, the manual switch can be used for secondary fire suppression, further enhancing the reliability of the secondary fire suppression component 4.

[0071] In some embodiments, the second-stage fire extinguishing assembly 4 further includes a check valve installed in the pipeline to prevent backflow of the fire extinguishing agent in the fire extinguishing agent container.

[0072] A check valve, also known as a one-way valve or non-return valve, is used to prevent the extinguishing agent from flowing backwards or in the opposite direction in a pipeline, thus preventing backflow of the extinguishing agent and protecting the extinguishing agent container from damage. The above technical solution, through the check valve, maintains the directionality of the extinguishing agent flow within the container, thereby improving the working efficiency, safety, and reliability of the second-stage fire extinguishing assembly 4.

[0073] In some embodiments, the battery pack further includes a smoke detector 6, which is mounted on the housing assembly 1.

[0074] The smoke alarm 6 comprises a sensor and an alarm. The sensor is the core component of the smoke alarm 6, used to detect smoke in the air. The sensor can be a photoelectric sensor or an ionization sensor. A photoelectric sensor works by detecting the scattering of light by smoke particles. When the smoke concentration reaches a certain level, the photoelectric sensor triggers an alarm. An ionization sensor uses radioactive materials (usually cesium or radium) to sense smoke in the air. Particles in the smoke interfere with the ionization current, thus triggering an alarm. Once the sensor detects smoke, the alarm will sound as a warning.

[0075] The smoke detector 6 can detect smoke, alarm, and provide fault indications. By monitoring the smoke concentration in the environment in real time, it can accurately determine whether alarm conditions are met. Upon detecting smoke, it quickly emits an audible or visual signal (such as flashing lights) to alert the operator of potential fire risks. When smoke appears inside the battery pack, it indicates that the battery pack has thermally runaway, and the smoke detector 6 will issue a warning signal to remind the operator to take action.

[0076] This disclosure also provides a new energy device, including a battery pack provided by any of the technical solutions disclosed herein. New energy devices include, for example, new energy vehicles, new energy engineering vehicles or other electric vehicles, renewable energy storage, portable electronic devices, and other equipment.

[0077] The battery pack provided by the above technical solution also has the technical effects described above, since it has the battery pack provided by the embodiments of this disclosure.

[0078] Figure 3 is a schematic diagram of the battery pack fire extinguishing method provided in an embodiment of this disclosure. Figure 4 is a schematic diagram of the second-stage fire extinguishing logic of the battery pack fire extinguishing method provided in an embodiment of this disclosure.

[0079] Referring to Figures 3 and 4, this disclosure also provides a battery pack fire extinguishing method, including the following steps:

[0080] Step S100: When the temperature at the thermal runaway location inside the battery pack provided by any of the technical solutions of this disclosure exceeds the first set threshold, the first-stage fire extinguishing component 3 is automatically activated to spray fire extinguishing agent at the thermal runaway location.

[0081] In step S200, when the temperature inside the battery pack exceeds the second set threshold, the second-stage fire extinguishing component 4 is activated to spray fire extinguishing agent into the housing component 1 through the fire extinguishing agent injection port 12; wherein the second set threshold is greater than the first set threshold.

[0082] When the first-stage fire suppression component 3 is activated, the battery management system 5 detects that the internal temperature of the battery pack is still rising and immediately sends a command to the second-stage fire suppression component 4. The second-stage fire suppression component 4 sends a fire suppression command, and the extinguishing agent is sprayed into the battery pack through the injection port until the fire inside the battery pack is extinguished. In addition, the second-stage fire suppression component 4 is also equipped with a manual switch. When the electronic switch fails, the manual switch can be activated to extinguish the fire, thereby increasing the reliability of the fire suppression.

[0083] In some embodiments, the location of thermal runaway corresponds to one or more fire extinguishing discs of the first-stage fire extinguishing component 3.

[0084] In some embodiments, the battery management system 5 is used to obtain the temperature inside the battery pack.

[0085] This disclosure provides a battery pack fire suppression system, including a memory and a processor coupled to the memory. The processor is configured to execute the battery pack fire suppression method of any of the foregoing embodiments based on instructions stored in the memory.

[0086] Memory may include, for example, system memory, fixed non-volatile storage media, etc. System memory may store, for example, the operating system, application programs, boot loader, and other programs.

[0087] Some embodiments of this disclosure also provide a computer-readable storage medium having a computer program stored thereon. When executed by a processor, this program implements the battery pack fire extinguishing method of any of the above embodiments.

[0088] The processors described herein may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in alternatives, it may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0089] Storage media can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Any connection is also properly referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then such coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of media. As used herein, disk and disc include compact discs (CDs), laser discs, optical discs, digital multi-purpose discs (DVDs), floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, and discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0090] Those skilled in the art will understand that the method embodiments of this disclosure can be provided as a method, system, or computer program product. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0091] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more flowchart illustrations and / or one or more block diagrams.

[0092] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0093] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0094] In the description of this disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them; although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this disclosure.

Claims

1. A battery pack, comprising: The housing assembly (1) includes a receiving cavity (11) and an extinguishing agent injection port (12) communicating with the receiving cavity (11); The battery cell assembly (2) is installed in the accommodating cavity (11); A first-stage fire extinguishing assembly (3) is installed in the accommodating cavity (11), and the first-stage fire extinguishing assembly (3) is configured to extinguish the fire in the battery cell assembly (2); and The second-stage fire extinguishing assembly (4) is installed outside the housing assembly (1) and is connected to the fire extinguishing agent injection port (12). The second-stage fire extinguishing assembly (4) is configured to spray fire extinguishing agent into the battery cell assembly (2) inside the accommodating cavity (11).

2. The battery pack according to claim 1, wherein the cell assembly (2) includes at least one cell (21), and the first-stage fire extinguishing assembly (3) includes at least one fire extinguishing disc, wherein the cell (21) and the fire extinguishing disc are arranged in a one-to-one correspondence.

3. The battery pack according to claim 2, wherein each of the battery cells (21) includes an explosion-proof valve (211) facing the inner wall of the housing assembly (1); the fire extinguishing disc is fixed to the inner wall of the housing assembly (1) and faces the explosion-proof valve (211) to spray fire extinguishing agent at the explosion-proof valve (211).

4. The battery pack according to claim 2 or 3, wherein the fire extinguishing discs are arranged in rows at the bottom of the inner wall of the housing assembly (1).

5. The battery pack according to any one of claims 1 to 4, wherein the number of the fire extinguishing agent injection ports (12) is multiple, and each of the fire extinguishing agent injection ports (12) is distributed in a dispersed manner.

6. The battery pack according to claim 5, wherein each of the fire extinguishing agent injection ports (12) is provided with a second-stage fire extinguishing component (4).

7. The battery pack according to any one of claims 1 to 6, further comprising: A battery management system (5) is installed on one side of the battery cell assembly (2). The battery management system (5) is electrically connected to the second-stage fire extinguishing assembly (4) to control the operation and shutdown of the second-stage fire extinguishing assembly (4).

8. The battery pack according to claim 7, wherein the second-stage fire extinguishing assembly (4) comprises: A fire extinguishing agent container for holding fire extinguishing agent; the fire extinguishing agent container includes a fire extinguishing agent outlet. The pipeline is connected to the extinguishing agent outlet of the extinguishing agent container; as well as A switching valve is installed in the pipeline to control the opening and closing of the pipeline; the battery management system (5) is electrically connected to the switching valve to control the opening and closing state of the switching valve.

9. The battery pack of claim 8, wherein the switching valve comprises: A manual control valve is installed in the pipeline; as well as An automatic control valve is arranged side by side with the manual control valve and is also arranged in the pipeline; When either the manual control valve or the automatic control valve is turned on, the pipeline is connected.

10. The battery pack according to claim 8 or 9, wherein the second-stage fire extinguishing assembly (4) further comprises: A check valve is installed in the pipeline to prevent the extinguishing agent in the extinguishing agent container from flowing back.

11. The battery pack according to any one of claims 1 to 10, further comprising: A smoke detector (6) is installed on the housing assembly (1).

12. A new energy device comprising the battery pack as described in any one of claims 1 to 11.

13. A method for extinguishing a battery pack fire, comprising the following steps: When the temperature at the thermal runaway location inside the battery pack according to any one of claims 1 to 11 exceeds a first set threshold, the first-stage fire extinguishing component (3) is automatically activated to spray fire extinguishing agent at the thermal runaway location; When the temperature inside the battery pack exceeds the second set threshold, the second-stage fire extinguishing component (4) is activated to spray fire extinguishing agent into the housing component (1) through the fire extinguishing agent injection port (12); wherein the second set threshold is greater than the first set threshold.

14. The battery pack fire extinguishing method according to claim 13, wherein the thermal runaway location corresponds to one or more of the fire extinguishing discs of the first-stage fire extinguishing component (3).

15. The battery pack fire extinguishing method according to claim 13 or 14, wherein a battery management system (5) is used to obtain the temperature inside the battery pack.

16. A battery pack fire suppression system, comprising: Memory; and A processor coupled to the memory, the processor being configured to execute the battery pack fire extinguishing method as described in any one of claims 13 to 15 based on instructions stored in the memory.

17. A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the battery pack fire extinguishing method as described in any one of claims 13 to 15.

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