Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, and the battery comprises a housing which is provided with an accommodation cavity; the single battery is arranged in the accommodating cavity and is provided with a first pressure relief mechanism, and the first pressure relief mechanism is used for releasing substances in the single battery; the processing medium is arranged in the shell and is used for reacting with the substance, so that the value of the preset parameter in the substance is reduced; and the second pressure relief mechanism is arranged on the shell and used for discharging substances reacted with the treatment medium out of the shell. According to the battery and the power utilization device provided by the invention, the battery can treat gaseous combustible materials released by the battery monomers, so that the possibility of combustion is reduced, and the safety performance is good.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to a battery and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In existing batteries, after thermal runaway occurs, the individual cells release a large amount of flammable gaseous substances. These gaseous flammable substances are emitted outside the battery system and can be ignited by a tiny ignition source, causing violent combustion or even system explosion, resulting in poor safety performance. Utility Model Content

[0004] In view of the above problems, this application provides a battery and an electrical device, which can treat the gaseous combustibles released by its individual cells, reduce the possibility of combustion, and have good safety performance.

[0005] In a first aspect, this application provides a battery, comprising: a housing having a receiving cavity; a battery cell disposed in the receiving cavity, the battery cell having a first pressure relief mechanism for releasing a substance within the battery cell; a processing medium disposed in the housing and used to react with the substance to reduce the value of a predetermined parameter in the substance; and a second pressure relief mechanism disposed in the housing for discharging the substance reacted with the processing medium to the outside of the housing.

[0006] In the technical solution of this application embodiment, the battery includes a casing, a battery cell, a processing medium, and a second pressure relief mechanism. The first pressure relief mechanism of the battery cell can release substances such as flammable gases generated by thermal runaway within the battery cell. Since the casing is provided with a processing medium, it can react with the substances released by the battery cell, thereby reducing the value of predetermined parameters in the substances. This reduces the value of predetermined parameters in the substances discharged by the second pressure relief mechanism, decreases the possibility of combustion of gaseous flammable materials, and improves the safety of the battery system.

[0007] In some embodiments, the substance includes combustible particles and combustible gas, and predetermined parameters include at least one of the temperature of the substance, the concentration of combustible particles, and the concentration of combustible gas.

[0008] The battery provided in this application embodiment is highly susceptible to ignition by a small ignition source, leading to violent combustion, due to the higher the temperature, concentration, and concentration of combustible particles and gases, especially with the participation of oxidizers such as oxygen. Therefore, by ensuring that predetermined parameters include at least one of the temperature of the substance, the concentration of combustible particles, and the concentration of combustible gases, the reaction between the processing medium and the substance can reduce the temperature of the substance, the concentration of combustible particles, or the concentration of combustible gases, thereby reducing the probability of combustion.

[0009] In some embodiments, the portion of the battery cell facing away from the first pressure relief mechanism is located within the processing medium.

[0010] The battery provided in this embodiment, through the above-described configuration, allows the processing medium to be directly placed in the receiving cavity after the battery cell is installed into the casing, facilitating the assembly of the processing medium. Furthermore, the substance released by the first pressure relief mechanism can flow downwards into the processing medium under the influence of gravity or other internal pressures to react with it. Once the pressure inside the receiving cavity reaches a predetermined level, the reacted substance is discharged to the outside of the casing through the second pressure relief mechanism. This configuration satisfies the processing requirements for the substance released from the battery cell, reduces the value of predetermined parameters, and requires minimal modification to the battery structure and assembly process.

[0011] In some embodiments, the battery further includes a separator disposed within the housing and used to divide the receiving cavity into a first chamber and a second chamber, wherein a battery cell is disposed in the first chamber and a processing medium is disposed in the second chamber, and the first chamber and the second chamber are connected.

[0012] The battery provided in this application embodiment, by setting a separator, can divide the receiving cavity into a first chamber and a second chamber, so that the battery cells and the processing medium can be set independently. The separator can provide a blocking effect for the movement of the processing medium, preventing the processing medium from shaking arbitrarily in the receiving cavity due to vibration of the battery during transportation or operation, thereby improving the safety performance of the battery.

[0013] In some embodiments, the partition is provided with a connecting hole that connects the first chamber and the second chamber, and the first pressure relief mechanism is disposed facing the partition and opposite to the connecting hole.

[0014] The battery provided in this application embodiment has a connecting hole on the separator that connects the first chamber and the second chamber, and the first pressure relief mechanism is oriented toward the separator and is positioned opposite to the connecting hole. When the battery experiences thermal runaway, the substances released by the first pressure relief mechanism in the battery cell can directly enter the second chamber through the connecting hole and react with the processing medium in the second chamber, thereby reducing the temperature of the substances and the concentration of combustible gases, combustible particles, etc.

[0015] In some embodiments, the separator includes a first separator plate disposed in the receiving cavity and connected to the inner wall of the housing to divide the receiving cavity into a first chamber and a second chamber, and the battery cell is supported on the first separator plate.

[0016] The battery provided in this application embodiment has a simple structure, is easy to process and form, and is easy to connect with the casing, and can meet the installation and support effects of the battery cells.

[0017] In some embodiments, the separator further includes a second partition plate, which divides the first chamber into a first sub-chamber and a second sub-chamber. The first sub-chamber and the second sub-chamber are respectively connected to the second chamber. The battery cell is disposed in the first sub-chamber, and the second pressure relief mechanism is disposed in the wall portion of the housing that encloses the second sub-chamber.

[0018] The battery provided in this application embodiment has a separator with the above-described structure, which allows the released material to directly enter the second chamber and react with the processing medium before being discharged through the second sub-chamber and the second pressure relief mechanism. This shortens the material flow path and prevents the material that has reacted with the processing medium from re-entering the second chamber through the first sub-chamber, thus ensuring the reaction effect between the material released by the first pressure relief valve and the processing medium.

[0019] In some embodiments, the first partition plate is disposed intersecting with the second partition plate and is integral with the second partition plate.

[0020] In some embodiments, the volume of the processing medium is smaller than the volume of the second chamber.

[0021] In some embodiments, the battery further includes a seal that can switch from a first state to a second state under a predetermined pressure; in the first state, the seal closes the processing medium to restrict the movement of the processing medium toward the battery cell; in the second state, the seal releases the processing medium to allow the processing medium to react with the substance.

[0022] In some embodiments, the seal includes a sealing bag membrane. In a first state, the processing medium is filled and sealed within the sealing bag membrane. In a second state, the sealing bag membrane is at least partially heated and melted, allowing the processing medium to overflow from the sealing bag membrane and react with the substance.

[0023] The battery provided in this application embodiment, by including a sealing bag membrane in the sealing element, can effectively ensure that the sealing element can switch from a first state to a second state. Furthermore, its simple structure facilitates the passive release of the processing medium.

[0024] In some embodiments, the seal includes a sealing bag membrane and a control valve. In a first state, the control valve is closed, and the processing medium fills and seals the sealing bag membrane. In a second state, the control valve is open, and the processing medium overflows from the sealing bag membrane and reacts with the substance.

[0025] The battery provided in this application embodiment includes a sealing film and a control valve in its sealing component. The opening and closing of the sealing film can be achieved by controlling the opening and closing of the control valve, thus realizing active control of the sealing film.

[0026] In some embodiments, the housing includes a box and a cover, which together enclose a receiving cavity, and a second pressure relief mechanism is disposed on the side wall of the box.

[0027] The battery provided in this application embodiment facilitates the release of the medium after the reaction between the substance and the processing medium by having the second pressure relief mechanism disposed on the side wall of the housing.

[0028] In some embodiments, the processing medium is liquid.

[0029] The battery provided in this application embodiment makes the processing medium liquid, which facilitates the reaction between the medium and the substance, thereby reducing the temperature of the substance and the concentration of combustible particles and combustible gases.

[0030] In some embodiments, the processing medium includes at least one of ultrapure water and fluorinated liquid.

[0031] The battery provided in this application embodiment, by including ultrapure water and fluorinated liquid as the processing medium, not only has high inertness and is not prone to chemical reaction with substances, which is beneficial to improving the safety of the processing medium during use, but also can quickly vaporize after being heated to remove heat from the substances. At the same time, the vaporized processing medium can also reduce the concentration of combustible particles or combustible gases in the substances.

[0032] In some embodiments, the battery further includes a sealing fluid with a density less than that of the processing medium.

[0033] The battery provided in this application embodiment uses a sealing liquid with a density lower than that of the processing medium, allowing the sealing liquid to float on the processing medium, reducing the evaporation loss of the processing medium, and ensuring the treatment effect on the substances released from the battery cells.

[0034] In some embodiments, the processing medium is solid and includes an oxidant.

[0035] The battery provided in this application embodiment can also meet the reaction requirements of the medium released by the battery cell by making the processing medium solid.

[0036] Secondly, this application provides an electrical device including the aforementioned battery.

[0037] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0039] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the structure of a battery provided in one embodiment of this application;

[0041] Figure 3 yes Figure 2 A cross-sectional view of the battery in the illustrated embodiment;

[0042] Figure 4 This is an exploded structural diagram of a battery cell provided in an embodiment of this application;

[0043] Figure 5 This is a schematic diagram of the battery structure provided in another embodiment of this application;

[0044] Figure 6 This is a top view of a battery provided in another embodiment of this application;

[0045] Figure 7 yes Figure 6 A cross-sectional view along the AA direction;

[0046] Figure 8 This is a schematic diagram of the structure of a battery provided in another embodiment of this application;

[0047] Figure 9 This is a schematic diagram of the structure of a battery provided in another embodiment of this application.

[0048] The reference numerals in the detailed embodiments are as follows:

[0049] 1000 - Vehicles;

[0050] 100 - Battery; 200 - Controller; 300 - Motor;

[0051] 10-Shell; 11-Box; 12-Cap; 13-Receiving cavity; 131-First chamber; 131a-First sub-cavity; 131b-Second sub-cavity; 132-Second chamber;

[0052] 20-cell battery;

[0053] 21-Outer shell;

[0054] 22-Electrode assembly; 221-Positive electrode tab; 222-Negative electrode tab;

[0055] 23-End cap assembly; 231-Cover plate; 232-Electrode terminal;

[0056] 24 - First pressure relief mechanism;

[0057] 30 - Processing medium;

[0058] 40 - Second pressure relief mechanism;

[0059] 50 - Separator; 51 - First separator plate; 52 - Second separator plate; 53 - Connecting hole;

[0060] 60 - Seal; 61 - Sealing bag membrane; 62 - Control valve. Detailed Implementation

[0061] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0062] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0063] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0064] Furthermore, technical terms such as "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 technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0065] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0066] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0068] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery generally includes a housing for encapsulating one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0069] The inventors noted that when a battery experiences thermal runaway, it is easily ignited by a tiny ignition source, leading to violent combustion or even an explosion, resulting in poor safety performance. Further research revealed that during thermal runaway, a large amount of gas is generated within each battery cell. This gas contains a certain percentage of flammable substances. When the pressure within the battery cell reaches a predetermined parameter, the gas and other substances are released into the battery casing through a corresponding pressure relief mechanism on the battery cell. When the internal pressure of the casing reaches a predetermined requirement, the gas and other substances are released outside the battery through a pressure relief mechanism located on the casing. Because the released material includes a large amount of flammable substances, it is highly susceptible to ignition by a tiny ignition source, especially with the participation of oxidizers such as oxygen, leading to violent combustion and even the risk of battery explosion.

[0070] To alleviate the problem of poor battery safety performance, the inventors discovered that by reducing the temperature and concentration of flammable substances in the gas before it is released from the battery casing to the outside, the probability of combustion of the gas emitted from the battery can be reduced, thereby improving the battery's safety performance.

[0071] Based on the above considerations, and to address the issue of poor battery safety performance, the inventors, after in-depth research, designed a battery comprising a casing, battery cells, a processing medium, and a second pressure relief mechanism. The casing has a receiving cavity, in which the battery cells are disposed. Each battery cell has a first pressure relief mechanism for releasing substances within the battery cell. The processing medium is disposed in the casing and reacts with the substances to reduce the values ​​of predetermined parameters within the substances. The second pressure relief mechanism, disposed in the casing, is used to discharge the substances reacted with the processing medium to the outside of the casing.

[0072] In such a battery, the first pressure relief mechanism of the battery cell can release substances such as flammable gases generated by thermal runaway within the battery cell. Since a processing medium is provided inside the casing, it can react with the substances released by the battery cell, thereby reducing the value of predetermined parameters in the substances. This reduces the value of predetermined parameters in the substances discharged by the second pressure relief mechanism, decreases the possibility of combustion of gaseous flammable materials, and thus improves the safety of the battery system.

[0073] The technical solutions described in this application are applicable to battery-powered devices. These devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the aforementioned power devices.

[0074] It should be understood that the technical solutions described in the embodiments of this application are not limited to the electrical devices described above, but can also be applied to all batteries including housings and electrical devices using batteries. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0075] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0076] Please refer to Figure 1 The vehicle 1000 has a battery 100 installed inside it. The battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000, for example, the battery 100 can be used as the operating power source for the vehicle 1000.

[0077] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0078] In some embodiments, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0079] Please refer to Figure 2 as well as Figure 3The battery 100 includes a housing 10, a battery cell 20, a processing medium 30, and a second pressure relief mechanism 40. The housing 10 has a receiving cavity 13, in which the battery cell 20 is disposed. The battery cell 20 has a first pressure relief mechanism 24 for releasing substances within the battery cell 20. The processing medium 30 is disposed in the housing 10 and reacts with the substances to reduce the values ​​of predetermined parameters in the substances. The second pressure relief mechanism 40 is disposed in the housing 10 and is used to discharge the substances reacted with the processing medium to the outside of the housing 10.

[0080] Optionally, the housing 10 is used to provide a sealed space for the battery cell 20. The housing 10 can be of various shapes, such as a cylinder, a cuboid, etc. Figure 2 For example, the housing 10 is a cuboid.

[0081] In some embodiments, such as Figure 2 , Figure 3 As shown, the housing 21 may include a casing 11 and a cover 12, which are fitted together to define a receiving cavity 13 for accommodating the battery cell 20. The casing 11 may be a hollow structure with an opening on one side, and the cover 12 may also be a hollow structure with an opening on one side. The opening side of the cover 12 fits over the opening side of the casing 11, thus forming a housing 21 with a sealed space. Alternatively, the casing 11 may also be a hollow structure with an opening on one side, and the cover 12 may be a flat plate structure, with the two interlocking.

[0082] In a battery, there can be one or more battery cells 20. If there are multiple battery cells 20, they can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the whole assembly of multiple battery cells 20 is housed in the casing 21. Alternatively, multiple battery cells 20 can first be connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed configuration to form a whole, which is then housed in the casing 21. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0083] In some embodiments, the battery 100 may further include a busbar component, through which multiple battery cells 20 can be electrically connected to each other to achieve series, parallel, or mixed connection of the multiple battery cells 20. Taking two battery cells 20 connected in series as an example, the positive electrode terminal of one battery cell 20 is connected to the negative electrode terminal of another battery cell 20 through the busbar component to achieve series connection of the two battery cells 20.

[0084] Please refer to Figure 4The battery cell 20 may include a housing 21, an electrode assembly 22, an end cap assembly 23, and a first pressure relief mechanism. The housing 21 has an opening 211, the electrode assembly 22 is housed inside the housing 21, and the end cap assembly 23 includes a cover plate 231 and an electrode terminal 232. The cover plate 231 is used to cover the opening 211, and the electrode terminal 232 is used to be electrically connected to the electrode assembly 22.

[0085] The outer shell 21 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc. This application embodiment does not impose any special restrictions on this.

[0086] The outer casing 21 can be of various shapes, such as a cylinder or a cuboid. The shape of the outer casing 21 can be determined based on the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 is a cylindrical structure, the outer casing 21 can be a cylindrical structure; if the electrode assembly 22 is a cuboid structure, the outer casing 21 can be a cuboid structure. Figure 4 In this example, both the housing 21 and the electrode assembly 22 are rectangular parallelepiped structures.

[0087] The electrode assembly 22 may include a positive electrode, a negative electrode, and a separator. In some embodiments, the electrode assembly 22 may be a wound structure formed by winding the positive electrode, the separator, and the negative electrode. In still other embodiments, the electrode assembly 22 may also be a stacked structure formed by arranging the positive electrode, the separator, and the negative electrode in layers.

[0088] In some embodiments, the electrode assembly 22 may further include tabs, specifically a positive tab 221 and a negative tab 222. The positive tab 221 may be a positive current collector in the positive electrode sheet that is not coated with a positive active material layer, and the negative tab 222 may be a negative current collector in the negative electrode sheet that is not coated with a negative active material layer.

[0089] In this embodiment, the cover plate 231 of the end cap assembly 23 is used to seal the opening 211 of the outer casing 21 to form a sealed space (not shown) for accommodating the battery cell 20. The sealed space is also used to accommodate an electrolyte, such as an electrolyte solution. The electrode terminal 232 of the end cap assembly 23 serves as a component for outputting electrical energy from the electrode assembly 22, and the electrode terminal 232 is used for electrical connection with the electrode assembly 22, that is, the electrode terminal 232 is electrically connected to the tab of the electrode assembly 22.

[0090] Optionally, the first pressure relief mechanism 24 can be disposed on the cover plate 231 of the end cover assembly 23, or it can be disposed on the housing 21. When disposed on the housing 21, it can be disposed on the bottom wall of the housing 21.

[0091] Optionally, the first pressure relief mechanism 24 can be in the form of a pressure relief valve. Of course, the first pressure relief mechanism 24 can also be a groove or other markings provided on the cover plate 231 or the outer shell 21.

[0092] Optionally, the second pressure relief mechanism 24 can be in the form of a pressure relief valve. Of course, the first pressure relief mechanism 24 can also be provided with markings on the housing 10, etc.

[0093] Optionally, the substance released by the battery cell 20 may be a gaseous substance containing flammable components.

[0094] Optionally, the processing medium 30 can be a liquid medium, or of course, a solid medium.

[0095] Optionally, the processing medium 30 can be directly disposed inside the housing 10 and in contact with the inner wall surface of the housing 10. The substance released by the battery cell 20 can directly react with the processing substance in the receiving cavity 13 to achieve the predetermined parameter values ​​in the substance released by the battery cell 20. Of course, in some examples, the processing medium 30 can also be distributed in a processing space that is connected to and independent of the first pressure relief mechanism 24. This processing space is located inside the housing 11 and is contained by other components such as a container. The substance released by the battery cell 20 by the first pressure relief mechanism 24 can enter the release space connected to it, react with the substance, and then be discharged from the release space into the receiving cavity of the battery, and finally discharged outside the battery 100 by the second pressure relief mechanism 40. In some other examples, the processing medium 30 can be housed in a closed, sealed structure, which may be located within the receiving cavity 13. The structure may be equipped with an actively activated switch. When the battery 100 experiences thermal runaway, the switch activates, causing the processing medium 30 to overflow from the sealed structure and soak the processing space. Alternatively, the structure can be made of a material with a low melting point, which encapsulates the processing medium 30. Under the high temperature caused by the battery 100 runaway, the material passively melts, causing the processing medium 30 to overflow from the sealed structure and soak the processing space.

[0096] Optionally, the reaction between the treatment medium 30 and the substance can be understood as a chemical and / or physical reaction. Optionally, some of the combustible substances in the substance emitted by the battery cell 20 can react with the treatment medium 30 to generate substances with reduced flammability, thereby reducing the concentration of combustible substances. Of course, heat exchange can also occur between the treatment medium 30 and the substance to lower the temperature of the combustible substances, which can also be understood as a reaction between the treatment medium 30 and the substance.

[0097] Optionally, the substance may include combustible particles, dust, gas, etc., and the predetermined parameters may include the temperature of the substance, the concentration of combustible gas, the concentration of combustible particles, the weight ratio of combustible gas, the weight ratio of combustible particles, etc.

[0098] The battery 100 provided in this application embodiment includes a casing 21, a battery cell 20, a processing medium 30, and a second pressure relief mechanism 40. The first pressure relief mechanism 24 of the battery cell 20 can release substances such as flammable gases generated by thermal runaway within the battery cell 20. Since the casing 21 is provided with the processing medium 30, the processing medium 30 can react with the substances released from the battery cell 20, thereby reducing the value of predetermined parameters in the substances. This reduces the value of predetermined parameters in the substances discharged by the second pressure relief mechanism 40, decreases the possibility of combustion of gaseous flammable materials, and improves the safety of the battery system.

[0099] In some embodiments, the substance includes combustible particles and combustible gas, and predetermined parameters include at least one of the temperature of the substance, the concentration of combustible particles, and the concentration of combustible gas.

[0100] Optionally, the substance may include only combustible particles, or only combustible gas, or it may include both combustible particles and combustible gas.

[0101] Alternatively, the temperature of a substance can be understood as the overall temperature of all its components, such as combustible particles and combustible gases.

[0102] Optionally, the predetermined parameters may include one of the following: the temperature of the substance, the concentration of combustible particles, and the concentration of combustible gas, or a combination of both, or all three at the same time.

[0103] The battery provided in this application embodiment is highly susceptible to ignition by a small ignition source, leading to violent combustion, due to the higher the temperature, concentration, and concentration of combustible particles and gases, especially with the participation of oxidizers such as oxygen. Therefore, by ensuring that predetermined parameters include at least one of the temperature of the substance, the concentration of combustible particles, and the concentration of combustible gases, the processing medium 30 can reduce the temperature of the substance, the concentration of combustible particles, or the concentration of combustible gases after reacting with the substance, thereby reducing the probability of combustion.

[0104] Continue reading Figure 2 as well as Figure 3 As shown, in some alternative embodiments, the portion of the battery cell 20 facing away from the first pressure relief mechanism 24 is located within the processing medium 30.

[0105] Alternatively, the processing medium 30 can be directly disposed within the receiving cavity. The rear portion of the battery cell 20 placed in the receiving cavity is located within the processing medium 30. For example, when the processing medium 30 is liquid, the side of the battery cell 20 facing away from the first pressure relief mechanism 24 is located within the processing medium 30.

[0106] The battery provided in this embodiment, through the above-described configuration, allows the processing medium 30 to be directly placed in the receiving cavity 13 after the battery cell 20 is installed into the housing 21. This facilitates the assembly of the processing medium 30. Furthermore, the substance released by the first pressure relief mechanism 24 can flow downwards into the processing medium 30 under the influence of gravity or other internal pressures to react with it. Once the pressure inside the receiving cavity 13 reaches a predetermined level, the reacted substance is discharged to the outside of the housing 21 through the second pressure relief mechanism 40. This configuration satisfies the processing requirements for the substance released from the battery cell 20, reduces the value of predetermined parameters, and requires minimal modification to the battery structure and assembly process.

[0107] Please see Figures 5 to 7 As shown, in some optional embodiments, the battery 100 provided in this application embodiment further includes a separator 50. The separator 50 is disposed in the housing 10 and is used to divide the receiving cavity 13 to form a first chamber 131 and a second chamber 132. The battery cell 20 is disposed in the first chamber 131, and the processing medium 30 is disposed in the second chamber 132. The first chamber 131 and the second chamber 132 are connected.

[0108] Optionally, the partition 50 may be a plate-shaped structure, and the partition 50 may divide the receiving cavity 13 into a first chamber 131 and a second chamber 132 in the transverse or longitudinal direction.

[0109] For example, the partition 50 can be made to divide the receiving cavity 13 longitudinally to form a first chamber 131 and a second chamber 132, optionally the second chamber 132 can be located below the first chamber 131.

[0110] The battery provided in this application embodiment, by setting a separator 50, can divide the receiving cavity 13 into a first chamber 131 and a second chamber 132, so that the battery cell 20 and the processing medium 30 can be set independently. The separator 50 can provide a blocking effect for the movement of the processing medium 30, preventing the processing medium 30 from shaking arbitrarily in the receiving cavity 13 due to vibration of the battery 100 during transportation or operation, thereby improving the safety performance of the battery 100.

[0111] In some alternative embodiments, the partition 50 is provided with a communication hole 53 connecting the first chamber 131 and the second chamber 132, and the first pressure relief mechanism 24 is disposed facing the partition 50 and opposite to the communication hole 53.

[0112] Optionally, the number of connecting holes 53 can be two or more. Optionally, the number of connecting holes 53 can be equal to the number of battery cells 20, and of course, the number of connecting holes 53 can also be more than the number of battery cells 20. The first pressure relief mechanism 24 of each battery cell 20 can be arranged opposite to the connecting hole 53.

[0113] Optionally, the shape of the connecting hole 53 can match the shape of the first pressure relief mechanism 24, and the size of the connecting hole 53 can be larger than the size of the first pressure relief mechanism 24.

[0114] The battery provided in this application embodiment has a connecting hole 53 on the separator 50 that connects the first chamber 131 and the second chamber 132, and the first pressure relief mechanism 24 is positioned facing the separator 50 and opposite to the connecting hole 53. When the battery 100 experiences thermal runaway, the substances released by the first pressure relief mechanism 24 in the battery cell 20 can directly enter the second chamber 132 through the connecting hole 53 and react with the processing medium 30 in the second chamber 132, thereby reducing the temperature of the substances and the concentration of combustible gases, combustible particles, etc.

[0115] In some alternative embodiments, the separator 50 includes a first separator 51 disposed in the receiving cavity 13 and connected to the inner wall of the housing 10 to divide the receiving cavity 13 into a first chamber 131 and a second chamber 132, and the battery cell 20 is supported on the first separator 51.

[0116] Optionally, the first partition plate 51 can be a flat plate-shaped structure, and the outer wall of the first partition plate 51 can be connected to the side wall of the housing 10 that encloses the receiving cavity 13. The connection can be made by welding, or it can be an integral structure.

[0117] The battery 100 provided in this application embodiment has a simple structure, which is easy to process and form and connect with the housing 10, by making the separator 50 include the first separator 51, and can meet the installation and support effect of the battery cell 20.

[0118] In some alternative embodiments, the separator 50 further includes a second separator 52, which divides the first chamber 131 into a first sub-chamber 131a and a second sub-chamber 131b. The first sub-chamber 131a and the second sub-chamber 131b are respectively connected to the second chamber 132. The battery cell 20 is disposed in the first sub-chamber 131a, and the second pressure relief mechanism 40 is disposed in the wall portion of the housing 10 that surrounds the second sub-chamber 131b.

[0119] Optionally, the second partition plate 52 and the first partition plate 51 can be connected to each other, or they can abut against each other.

[0120] Optionally, the volume of the first sub-cavity 131a can be larger than the volume of the second sub-cavity 131b, thereby increasing the capacity of the battery cells 20.

[0121] Optionally, the first sub-cavity 131a and the second sub-cavity 131b are each connected to the second chamber 132, but the first sub-cavity 131a and the second sub-cavity 131b may not be connected to each other.

[0122] Optionally, the second pressure relief mechanism 40 is disposed in the wall portion of the housing 10 that encloses the second sub-cavity 131b, which can be understood as enabling the second pressure relief mechanism 40 to connect the outside world with the second sub-cavity 131b when it is opened.

[0123] The battery provided in this application embodiment includes a second partition plate 52 in the separator 50, which divides the first chamber 131 into a first sub-chamber 131a and a second sub-chamber 131b. This allows the substance released from the battery cell 20 by the first pressure relief mechanism 24 to directly enter the second chamber 132 through the connecting hole 53. After reacting with the processing medium 30 in the second chamber 132, the temperature of the substance and the concentration of the combustible substance decrease, and the substance enters the second sub-chamber 131b. When the second pressure relief mechanism 40 is opened, the substance that has reacted with the processing medium 30 is discharged from the second sub-chamber 131b to the outside of the battery 100 through the second pressure relief mechanism 40. The separator 50 adopts the above-described structure, which allows the released substance to directly enter the second chamber 132 and react with the processing medium 30 before being discharged through the second sub-chamber 131b and the second pressure relief mechanism 40. This shortens the path of the substance flow and prevents the substance that has reacted with the processing medium 30 from re-entering the second chamber 132 through the first sub-chamber 131a, thus ensuring the reaction effect between the substance released by the first pressure relief valve and the processing medium 30.

[0124] In some alternative embodiments, the first partition plate 51 is intersecting with the second partition plate 52 and is integral with the second partition plate 52.

[0125] Optionally, the included angle between the first partition plate 51 and the second partition plate 52 can be less than 90°, but of course, the included angle between the two can also be equal to 90°.

[0126] Optionally, the first partition plate 51 and the second partition plate 52 can be integrally formed by casting or other methods.

[0127] The battery 100 provided in this application embodiment facilitates the formation of the first sub-cavity 131a and the second sub-cavity 131b by intersecting the first partition plate 51 and the second partition plate 52. Furthermore, by making the first partition plate 51 and the second partition plate 52 an integral structure, the connection strength between the first partition plate 51 and the second partition plate 52 can be guaranteed, while also facilitating the integral installation of the partition member 50.

[0128] In some alternative embodiments, the volume of the processing medium 30 is smaller than the volume of the second chamber 132.

[0129] Optionally, after the second chamber 132 is filled with the processing medium 30, there is still remaining space, that is, the processing medium 30 does not completely fill the second chamber 132.

[0130] The battery 100 provided in this application embodiment facilitates the reaction of substances released from the battery cell 20 into the second chamber 132 with the processing medium 30 by making the volume of the processing medium 30 smaller than the volume of the second chamber 132.

[0131] Please see Figure 8 as well as Figure 9 In some alternative embodiments, the battery 100 further includes a seal 60, which is capable of switching from a first state to a second state under a predetermined pressure; in the first state, the seal 60 seals the processing medium 30 to restrict the movement of the processing medium 30 toward the battery cell 20; in the second state, the seal 60 releases the processing medium 30 to allow the processing medium 30 to react with the substance.

[0132] Optionally, in the first state, the seal 60 can be closed, and the processing medium 30 is enclosed within the seal 60, unable to move freely, and will not come into contact with other components such as the battery cell 20. In the second state, the seal 60 releases the processing medium 30, allowing it to react with other substances.

[0133] Optionally, the seal 60 can switch from the first state to the second state in an active manner or in a passive manner.

[0134] The battery provided in this application embodiment has a sealing element 60 that can switch between a first state and a second state. When the battery 100 does not experience thermal runaway, the sealing element 60 is in the first state, and the processing medium 30 is sealed by the sealing element 60 and cannot move freely. When the battery experiences thermal runaway and the battery cell 20 releases substances, the sealing element 60 can switch from the first state to the second state, allowing the processing medium 30 to be released and react with the substances released by the battery cell 20, thereby reducing the temperature of the substances and the concentration of combustible particles and combustible gases.

[0135] like Figure 8 As shown, in some optional embodiments, the battery 100 provided in this application embodiment includes a sealing bag membrane 60. In a first state, the processing medium 30 is filled and sealed in the sealing bag membrane 61. In a second state, the sealing bag membrane 61 is at least partially heated and melted, and the processing medium 30 overflows from the sealing bag membrane 61 and reacts with the substance.

[0136] Optionally, in the first state, the sealing bag film 61 can be in a completely sealed state, and in the second state, the sealing bag film 61 is heated and melted, causing it to break, so that the processing medium 30 can overflow from the sealing bag film 61 and react with the substance.

[0137] Optionally, the melting point T of the sealing bag film 61 can meet the following requirements: 70℃≤T≤200℃. The sealing bag film 61 separates the processing medium 30 from the receiving cavity 13. The sealing bag film 61 can be in various shapes such as sheet, hollow block or column, etc. There are no restrictions here, and it can be selected according to specific needs.

[0138] Optionally, when the separator 50 is included, the sealing element 60 and the separator 50 can be connected, or they can be separate. When connected, they can be bonded or used for abutment clamping and limiting. Optionally, the material of the sealing bag film 61 can include at least one of polypropylene, polyethylene terephthalate, and polyvinyl chloride. Of course, the material of the sealing bag film 61 can also include other plastics, as long as they meet the above-mentioned melting point range.

[0139] The battery 100 provided in this embodiment effectively ensures that the sealing member 60 can switch from a first state to a second state by including a sealing bag film 61 in the sealing member 60. Furthermore, its simple structure facilitates the passive release of the processing medium 30.

[0140] It is understood that in the above embodiments, the sealing bag film 61 is passively opened, which is an optional implementation method, but is not limited to the above method. In some implementations, the sealing bag film 61 can also be actively opened.

[0141] like Figure 9 As shown, in some alternative embodiments, the seal 60 includes a sealing bag membrane 61 and a control valve 62. In a first state, the control valve 62 is closed, and the processing medium 30 fills and seals the sealing bag membrane 61. In a second state, the control valve 62 is open, and the processing medium 30 overflows from the sealing bag membrane 61 and reacts with the substance.

[0142] Optionally, the sealing bag film 61 may be provided with an opening, and a control valve 62 is provided at the opening to control the opening or closing of the opening.

[0143] Optionally, the control valve 62 can be a solenoid valve. By controlling the opening and closing of the solenoid valve, the seal 60 can be switched between the first state and the second state.

[0144] The battery provided in this application embodiment includes a sealing member 60 comprising a sealing bag membrane 61 and a control valve 62. The opening and closing of the sealing bag membrane 61 can be achieved by opening and closing the control valve 62, thus realizing active control of the sealing bag membrane 61.

[0145] In some optional embodiments, the battery 100 provided in this application includes a housing 10 comprising a box 11 and a cover 12, the box 11 and the cover 12 together forming a receiving cavity 13, and a second pressure relief mechanism 40 disposed on the side wall of the box 11.

[0146] Optionally, the housing 11 can be rectangular or cylindrical, and the second pressure relief mechanism 40 can be disposed on the side wall of the housing 11.

[0147] The battery 100 provided in this application embodiment facilitates the release of the medium after the reaction between the substance and the processing medium 30 by having the second pressure relief mechanism 40 disposed on the side wall of the housing 11.

[0148] In some alternative embodiments, the battery 100 provided in this application embodiment has a liquid processing medium 30.

[0149] The battery provided in this application embodiment makes the processing medium 30 liquid, which facilitates the reaction between the medium and the substance, thereby reducing the temperature of the substance and the concentration of combustible particles and combustible gases.

[0150] In some embodiments, the processing medium 30 includes at least one of ultrapure water and fluorinated liquid.

[0151] Optionally, the processing medium 30 may include one of ultrapure water and fluorinated liquid, or it may include both ultrapure water and fluorinated liquid.

[0152] The battery 100 provided in this application embodiment, by making the processing medium 30 include ultrapure water and fluorinated liquid, not only has high inertness and is not easy to react chemically with substances, which is beneficial to improving the safety of the processing medium during use, but can also quickly vaporize after being heated to remove heat from the substances. At the same time, the vaporized processing medium can also reduce the concentration of combustible particles or combustible gases in the substances.

[0153] In some optional embodiments, the battery 100 provided in this application embodiment also includes a sealing liquid, the density of which is less than the density of the processing medium 30.

[0154] Alternatively, the sealing fluid can be a non-volatile liquid, such as silicone oil.

[0155] The battery provided in this application embodiment uses a sealing liquid with a density less than that of the processing medium 30, allowing the sealing liquid to float on the processing medium 30, reducing the evaporation loss of the processing medium 30, and ensuring the treatment effect on the substances released from the battery cell 20.

[0156] It is understood that the battery 100 provided in the above embodiments of this application is illustrated by taking the processing medium 30 as a liquid state as an example. This is an optional implementation method, but it is not limited to the above method. In some embodiments, the processing medium 30 can also be made solid, and the processing medium 30 includes an oxidant, such as copper oxide.

[0157] The battery provided in this application embodiment can also meet the reaction requirements of the medium released by the battery cell 20 by making the processing medium 30 solid.

[0158] According to some embodiments of this application, this application also provides an electrical device including a battery as described in any of the above embodiments, and the battery is used to provide electrical energy to the electrical device. The electrical device can be any of the aforementioned devices or systems that utilize batteries.

[0159] The electrical device provided in this application includes the battery 100 provided in the above embodiments. Since the casing 10 of the battery 100 is provided with a processing medium 30, the processing medium 30 can react with the substances released by the battery cell 20, thereby reducing the value of predetermined parameters in the substances. This reduces the value of predetermined parameters in the substances discharged by the second pressure relief mechanism 40, reduces the possibility of combustion of gaseous combustibles, and thus improves the safety of the electrical device.

[0160] like Figure 5As shown, the battery 100 provided in this embodiment includes a housing 10, a battery cell 20, a processing medium 30, a second pressure relief mechanism 40, and a separator 50. The housing 10 has a receiving cavity 13, in which the battery cell 20 is disposed. The battery cell 20 has a first pressure relief mechanism 24 for releasing substances within the battery cell 20. The processing medium 30 is disposed in the housing 10 and reacts with the substances to reduce the values ​​of predetermined parameters in the substances. The second pressure relief mechanism 40 is disposed in the housing 10 and is used to discharge the substances reacted with the processing medium to the outside of the housing 10. The housing 10 is square, and the substances include combustible particles and combustible gases. The predetermined parameters include at least one of the temperature of the substances, the concentration of combustible particles, and the concentration of combustible gases. The processing medium 30 is liquid. A separator 50 is disposed within the housing 10 and serves to divide the receiving cavity 13 into a first chamber 131 and a second chamber 132. A battery cell 20 is disposed in the first chamber 131, and a processing medium 30 is disposed in the second chamber 132. The first chamber 131 and the second chamber 132 are connected. The separator 50 is provided with a connecting hole 53 that connects the first chamber 131 and the second chamber 132. A first pressure relief mechanism 24 faces the separator 50 and is disposed opposite to the connecting hole 53. The separator 50 includes a first separator 51 and a second separator 52. The first separator 51 is disposed in the receiving cavity 13 and connected to the inner wall of the housing 10 to divide the receiving cavity 13 into a first chamber 131 and a second chamber 132. The battery cell 20 is supported on the first separator 51. The second separator 52 divides the first chamber 131 into a first sub-cavity 131a and a second sub-cavity 131b. The first sub-cavity 131a and the second sub-cavity 131b are respectively connected to the second chamber 132. The battery cell 20 is disposed in the first sub-cavity 131a. The second pressure relief mechanism 40 is disposed in the wall of the housing 10 that surrounds the second sub-cavity 131b.

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that, include: The shell has a receiving cavity; A battery cell is disposed in the receiving cavity, and the battery cell has a first pressure relief mechanism for releasing substances inside the battery cell. A processing medium is disposed in the housing and used to react with the substance to reduce the value of a predetermined parameter in the substance; A second pressure relief mechanism is disposed in the housing, and the second pressure relief mechanism is used to discharge the substance after reacting with the processing medium to the outside of the housing.

2. The battery according to claim 1, characterized in that, The substance includes combustible particles and combustible gas, and the predetermined parameters include at least one of the temperature of the substance, the concentration of the combustible particles, and the concentration of the combustible gas.

3. The battery according to claim 1 or 2, characterized in that, The portion of the battery cell located away from the first pressure relief mechanism is within the processing medium.

4. The battery according to claim 1 or 2, characterized in that, The battery also includes a separator disposed within the housing and used to divide the receiving cavity into a first chamber and a second chamber. The battery cell is disposed in the first chamber, and the processing medium is disposed in the second chamber. The first chamber and the second chamber are connected.

5. The battery according to claim 4, characterized in that, The partition is provided with a connecting hole that connects the first chamber and the second chamber, and the first pressure relief mechanism is facing the partition and is disposed opposite to the connecting hole.

6. The battery according to claim 5, characterized in that, The separator includes a first separator plate, which is disposed in the receiving cavity and connected to the inner wall of the housing to divide the receiving cavity into a first chamber and a second chamber, and the battery cell is supported on the first separator plate.

7. The battery according to claim 6, characterized in that, The separator further includes a second partition plate, which divides the first chamber into a first sub-chamber and a second sub-chamber. The first sub-chamber and the second sub-chamber are respectively connected to the second chamber. The battery cell is disposed in the first sub-chamber, and the second pressure relief mechanism is disposed in the wall portion of the housing that encloses the second sub-chamber.

8. The battery according to claim 7, characterized in that, The first partition plate is intersecting with the second partition plate and is integral with the second partition plate.

9. The battery according to claim 4, characterized in that, The volume of the processing medium is smaller than the volume of the second chamber.

10. The battery according to claim 1, characterized in that, The battery also includes a seal that can switch from a first state to a second state under a predetermined pressure. In the first state, the seal closes the processing medium to restrict the movement of the processing medium toward the battery cell; In the second state, the seal releases the processing medium so that the processing medium reacts with the substance.

11. The battery according to claim 10, characterized in that, The seal includes a sealing bag membrane. In the first state, the processing medium fills and seals the sealing bag membrane. In the second state, the sealing bag membrane is at least partially heated and melts, allowing the processing medium to overflow from the sealing bag membrane and react with the substance.

12. The battery according to claim 10, characterized in that, The sealing element includes a sealing bag membrane and a control valve. In the first state, the control valve is closed, and the processing medium fills and seals the sealing bag membrane. In the second state, the control valve is open, and the processing medium overflows from the sealing bag membrane and reacts with the substance.

13. The battery according to claim 1, characterized in that, The housing includes a box and a cover, which together enclose the receiving cavity, and the second pressure relief mechanism is disposed on the side wall of the box.

14. The battery according to claim 1, characterized in that, The processing medium is in a liquid state.

15. The battery according to claim 14, characterized in that, The battery also includes a sealing fluid, the density of which is less than the density of the processing medium.

16. The battery according to claim 1, characterized in that, The processing medium is in a solid state and includes an oxidant.

17. An electrical device, characterized in that, Includes the battery as described in any one of claims 1 to 16.

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