Batteries, battery packs and electrical devices

Abstract

This invention discloses a battery, a battery pack, and an electrical device. The battery includes a casing, a core, a column, a first membrane, and a second membrane. The casing has an inner cavity, and the core is assembled within the inner cavity. The column supports the core to prevent it from collapsing. The column has a first cavity for storing a lithium replenishment medium and a second cavity for storing a fire-fighting medium. The first cavity has a first hole in its wall, and the second cavity has a second hole in its wall. The first membrane seals the first hole. When subjected to a first pressure, the first membrane ruptures, allowing the lithium replenishment medium in the first cavity to flow into the inner cavity through the first hole. The second membrane seals the second hole. When subjected to a second pressure, the second membrane ruptures, allowing the fire-fighting medium in the second cavity to flow into the inner cavity through the second hole. The second pressure is greater than the first pressure. The battery of this invention enables secondary lithium replenishment, improving the problems of short battery life and severe battery degradation. Furthermore, it has a fire-fighting function in the event of thermal runaway or rapid gas generation, ensuring the safety of battery use.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to a battery, a battery pack using the battery, and an electrical device using the battery or battery pack. Background Technology

[0002] A battery is an energy storage device that converts chemical energy into electrical energy. In recent years, with the country's promotion of new energy sources, batteries have been applied to more and more fields. However, in related technologies, single-cell batteries have problems such as the inability to recharge lithium ions, short battery life, and severe degradation. Secondly, due to limitations, some batteries also have the problem of not being able to install explosion-proof valves, which prevents single-cell batteries from effectively venting gas and reduces the safety of battery use. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] To address this, this invention proposes a battery that enables secondary lithium replenishment, improving the problems of short battery life and severe degradation. Furthermore, it has a fire extinguishing function in the event of thermal runaway or rapid gas generation, ensuring the safety of battery use.

[0005] The present invention also proposes a battery pack including the above-described battery.

[0006] The present invention also proposes an electrical device including the above-described battery or battery pack.

[0007] The battery of this invention includes:

[0008] The housing has an internal cavity;

[0009] A winding core, which is assembled inside the cavity of the housing;

[0010] A column, which is supported inside the core to prevent the core from collapsing, is provided with a first cavity for storing lithium replenishment medium and a second cavity for storing fire-fighting medium. The first cavity has a first hole in its wall and the second cavity has a second hole in its wall.

[0011] A first membrane is used to seal the first hole. The first membrane ruptures when subjected to a first pressure so that the lithium replenishment medium in the first cavity can flow into the inner cavity through the first hole.

[0012] The second membrane blocks the second hole, and the second membrane ruptures when subjected to a second pressure so that the fire-fighting medium in the second cavity can flow into the inner cavity through the second hole, and the second pressure is greater than the first pressure.

[0013] The battery of this invention can achieve secondary lithium replenishment, which improves the problems of short battery life and severe degradation. In addition, it has a fire extinguishing function in the event of thermal runaway or rapid gas generation, ensuring the safety of battery use.

[0014] In some embodiments, the battery includes a third membrane, and the housing has a third cavity for storing a lithium replenishing medium. The cavity wall of the third cavity has a third hole, and the third membrane blocks the third hole. When the third membrane is subjected to a third pressure, it ruptures so that the lithium replenishing medium in the third cavity can flow into the inner cavity through the third hole. The third pressure is less than the second pressure.

[0015] In some embodiments, the battery includes a fourth membrane, and the housing has a fourth cavity for storing fire-fighting medium. The cavity wall of the fourth cavity has a fourth hole, and the fourth membrane blocks the fourth hole. When the fourth membrane is subjected to a fourth pressure, it ruptures to allow the fire-fighting medium in the fourth cavity to flow into the inner cavity through the fourth hole. The fourth pressure is greater than the first pressure.

[0016] In some embodiments, the battery includes a third membrane and a fourth membrane, and the housing is provided with a third cavity for storing a lithium replenishment medium and a fourth cavity for storing a fire-fighting medium. The wall of the third cavity is provided with a third hole, and the wall of the fourth cavity is provided with a fourth hole.

[0017] The third membrane blocks the third hole, and the third membrane ruptures when subjected to the first pressure so that the lithium replenishment medium in the third cavity can flow into the inner cavity through the third hole;

[0018] The fourth membrane blocks the fourth hole, and the fourth membrane ruptures when subjected to the second pressure so that the fire-fighting medium in the fourth cavity can flow into the inner cavity through the fourth hole.

[0019] In some embodiments, in the inward and outward directions of the housing, the third cavity corresponds to the second cavity, and the fourth cavity corresponds to the first cavity.

[0020] In some embodiments, the third cavity is an annular cavity, and the third cavity surrounds the outer periphery of the second cavity;

[0021] And / or, the fourth cavity is an annular cavity, and the fourth cavity surrounds the outer periphery of the first cavity.

[0022] In some embodiments, both the first cavity and the second cavity are provided in multiples, and the multiple first cavities and the multiple second cavities are arranged alternately along the axial direction of the battery;

[0023] And / or, both the third cavity and the fourth cavity are provided in multiples, and the multiple third cavities and the multiple fourth cavities are arranged alternately along the axial direction of the battery.

[0024] In some embodiments, the housing includes an inner shell and an outer shell, the outer shell being sleeved on the outer periphery of the inner shell, the inner cavity being formed within the inner shell, the third hole, the fourth hole, the third membrane, and the fourth membrane being disposed within the inner shell, and the third cavity and the fourth cavity being formed between the inner shell and the outer shell.

[0025] In some embodiments, the battery includes a first end cap and a second end cap, the inner shell and the outer shell are both connected between the first end cap and the second end cap, one end of the column is abutted or connected to the first end cap, and the other end of the column is abutted or connected to the second end cap.

[0026] In some embodiments, the first hole and the second hole have different hole shapes, and / or the third hole and the fourth hole have different hole shapes.

[0027] In some embodiments, the column body is provided with a first partition, and the first cavity and the second cavity are isolated by the first partition;

[0028] And / or, the housing is provided with a second partition, and the third cavity and the fourth cavity are isolated by the second partition.

[0029] In some embodiments, the cavity wall of the first cavity is provided with a plurality of first holes, and the first membrane covers the outer peripheral side of the column and seals the plurality of first holes;

[0030] And / or, the cavity wall of the second cavity is provided with a plurality of second holes, and the second membrane covers the outer peripheral side of the column and seals the plurality of second holes.

[0031] In some embodiments, the column is made of an insulating material.

[0032] In some embodiments, the lithium replenishment medium includes at least one of the following: lithium powder and lithium salt solution;

[0033] And / or, the fire-fighting medium includes at least one of the following: perfluorohexanone, alkyl phosphate, or heptafluoropropane.

[0034] The battery pack of this invention includes the battery as described in any of the above embodiments.

[0035] The electrical equipment in this embodiment of the invention includes a battery as described in any of the above embodiments or includes a battery pack as described in any of the above embodiments. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the explosion of a battery according to an embodiment of the present invention.

[0037] Figure 2 This is a cross-sectional schematic diagram of a battery according to an embodiment of the present invention.

[0038] Figure label:

[0039] Shell 1; Inner shell 11; Third hole 111; Fourth hole 112; Outer shell 12; Second partition 13; Third cavity 14; Fourth cavity 15;

[0040] Column 2; First cavity 21; First hole 211; Second cavity 22; Second hole 221; First partition 23;

[0041] First end cap 3;

[0042] Second end cap 4;

[0043] 5. Inner cavity. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0045] like Figure 1 and Figure 2 As shown, the battery of this embodiment includes a casing 1, a core (not shown), a column 2, a first membrane, and a second membrane.

[0046] The housing 1 has an inner cavity 5. For example, the housing 1 can be an integral structure and generally cylindrical. The internal space of the housing 1 forms the inner cavity 5. When in use, the inner cavity 5 of the housing 1 can be filled with electrolyte.

[0047] The core may include a positive electrode sheet, a negative electrode sheet, and a separator. The separator is located between the positive electrode sheet and the negative electrode sheet. The core is a structure formed by winding the positive electrode sheet, the negative electrode sheet, and the separator. When assembling the battery, the core is assembled into the inner cavity 5 of the housing 1.

[0048] The column 2 is supported inside the core to prevent the core from collapsing. The column 2 is provided with a first cavity 21 for storing lithium replenishment medium and a second cavity 22 for storing fire-fighting medium. The cavity wall of the first cavity 21 is provided with a first hole 211 and the cavity wall of the second cavity 22 is provided with a second hole 221.

[0049] For example, the core can have a central hole, and the column 2 can be inserted into the central hole. With the support of the column 2, the core can be prevented from collapsing towards the center, thus improving the structural strength and stability.

[0050] like Figure 2As shown, the column 2 can be a hollow structure, and the column 2 can have two closed chambers, namely the first chamber 21 and the second chamber 22. The first chamber 21 and the second chamber 22 can be arranged at intervals along the axial direction (vertical direction) of the column 2. In some other embodiments, the first chamber 21 and the second chamber 22 can also be arranged at intervals along the circumference of the column 2. For example, the first chamber 21 and the second chamber 22 can be opposite each other in the radial direction of the column 2.

[0051] The first chamber 21 can be used to store a lithium replenishing medium, which can be a lithium replenishing agent (lithium salt solution). In some other embodiments, it can also be other types of media such as lithium powder. The second chamber 22 is used to store a fire-fighting medium, which can specifically be perfluorohexanone. In some other embodiments, the fire-fighting medium can also be a flame-retardant medium such as alkyl phosphate ester or heptafluoropropane.

[0052] like Figure 2 As shown, the column 2 may be provided with a first hole 211 and a second hole 221. Both the first hole 211 and the second hole 221 can extend radially along the column 2. The first hole 211 connects the first cavity 21 with the outer wall surface of the column 2, that is, the first hole 211 can connect the first cavity 21 with the inner cavity 5 of the shell 1. The second hole 221 connects the second cavity 22 with the outer wall surface of the column 2, that is, the second hole 221 can connect the second cavity 22 with the inner cavity 5 of the shell 1.

[0053] A first membrane (not shown) can be disposed on the column 2 and seal the first hole 211. Thus, the first membrane can block the first hole 211, thereby separating the first cavity 21 from the inner cavity 5 of the shell 1. Similarly, a second membrane (not shown) can be disposed on the column 2 and seal the second hole 221. Thus, the second membrane can block the second hole 221, thereby separating the second cavity 22 from the inner cavity 5 of the shell 1.

[0054] After prolonged use, the lithium ions inside the battery will be consumed and insufficient, and the gas production inside the battery will increase and accumulate. When the gas increases to a certain level, that is, when the gas pressure inside the casing 1 reaches the first pressure, the first membrane will be crushed under the action of the first pressure. At this time, the first cavity 21 is connected to the inner cavity 5 of the casing 1 through the first hole 211, and the lithium replenishing medium in the first cavity 21 will flow into the inner cavity 5 of the casing 1 through the first hole 211, thereby replenishing the lithium ion content in the electrolyte.

[0055] In addition, when the battery experiences thermal runaway or causes rapid internal gas generation due to abuse, the gas pressure inside the casing 1 will reach the second pressure. Under the action of the second pressure, the second membrane will rupture. At this time, the second cavity 22 can be connected to the inner cavity 5 of the casing 1 through the second hole 221. The fire-fighting medium in the second cavity 22 will flow into the casing 1 through the second hole 221 and play a role in fire extinguishing.

[0056] It should be noted that the second pressure should be greater than the first pressure. This ensures that the second membrane will not be damaged under normal use, and that the fire-fighting medium will not flow out of the second cavity 22, thus ensuring the stability of the battery.

[0057] The battery of this invention can achieve secondary lithium replenishment, which improves the problems of short battery life and severe degradation. In addition, it has a fire extinguishing function when the battery experiences thermal runaway or rapid gas generation, thus improving the safety of battery use.

[0058] In some embodiments, the battery includes a third membrane, and the housing 1 has a third cavity 14 for storing a lithium replenishing medium. The cavity wall of the third cavity 14 has a third hole 111. The third membrane blocks the third hole 111. The third membrane ruptures when subjected to the third pressure so that the lithium replenishing medium in the third cavity 14 can flow into the inner cavity 5 through the third hole 111. The third pressure is less than the second pressure.

[0059] For example, the shell 1 can have a sandwich structure design, with a third cavity 14 formed within the sandwich space and only having a third cavity 14. A third hole 111 can be provided on the inner wall of the shell 1 and extend radially along the shell 1. The third hole 111 serves to connect the third cavity 14 with the inner cavity 5 of the shell 1. A third membrane (not shown) can be provided on the inner wall of the shell 1 and seal the third hole 111. Thus, the third membrane can block the third hole 111, thereby separating the third cavity 14 from the inner cavity 5 of the shell 1.

[0060] As the gas inside the battery accumulates, when the gas pressure reaches the third pressure, the third membrane will be crushed under the action of the third pressure. At this time, the third cavity 14 is connected to the inner cavity 5 of the shell 1 through the third hole 111. The lithium replenishing medium in the third cavity 14 will flow into the inner cavity 5 of the shell 1 through the third hole 111, thereby also replenishing the lithium ion content in the electrolyte.

[0061] It should be noted that the third pressure should be lower than the second pressure to ensure that the second membrane will not be damaged under normal battery operation, thus achieving only the lithium replenishment effect. Furthermore, the third pressure can differ from the first pressure, allowing for gradient lithium replenishment. As the internal pressure of the battery increases, lithium ions in the electrolyte can first be replenished through the lithium replenishment medium in either the first chamber 21 or the second chamber 22. Then, as the pressure continues to rise, lithium ions can be replenished again using the lithium replenishment medium in the other chamber.

[0062] In some embodiments, the battery includes a fourth membrane, and the housing 1 has a fourth cavity 15 for storing fire-fighting medium. The cavity wall of the fourth cavity 15 has a fourth hole 112. The fourth membrane blocks the fourth hole 112. The fourth membrane ruptures when subjected to a fourth pressure so that the fire-fighting medium in the fourth cavity 15 can flow into the inner cavity 5 through the fourth hole 112. The fourth pressure is greater than the first pressure.

[0063] For example, the housing 1 can have a sandwich structure design, with a fourth cavity 15 formed within the sandwich space and only having a fourth cavity 15. A fourth hole 112 can be provided on the inner wall of the housing 1 and extend radially along the housing 1. The fourth hole 112 serves to connect the fourth cavity 15 with the inner cavity 5 of the housing 1. A fourth membrane (not shown) can be provided on the inner wall of the housing 1 and seal the fourth hole 112. Thus, the fourth membrane can block the fourth hole 112, thereby separating the fourth cavity 15 from the inner cavity 5 of the housing 1.

[0064] As gas accumulates inside the battery, when the gas pressure reaches a fourth pressure, the fourth membrane will rupture under this pressure. At this point, the fourth cavity 15 connects to the inner cavity 5 of the casing 1 through the fourth hole 112. The fire-fighting medium in the fourth cavity 15 will flow into the inner cavity 5 of the casing 1 through the fourth hole 112, thus achieving fire extinguishing. It should be noted that the fourth pressure should be greater than the first pressure to ensure that the fourth membrane will not rupture under normal battery operation. Furthermore, the fourth pressure can be the same as or different from the second pressure.

[0065] In some embodiments, the battery includes a third membrane and a fourth membrane. The housing 1 is provided with a third cavity 14 for storing a lithium replenishment medium and a fourth cavity 15 for storing a fire-fighting medium. The cavity wall of the third cavity 14 is provided with a third hole 111, and the cavity wall of the fourth cavity 15 is provided with a fourth hole 112.

[0066] For example, the interior of the housing 1 may be provided with two sealed chambers, namely the third chamber 14 and the fourth chamber 15. The third chamber 14 may store a lithium replenishing medium, which may be the same as the lithium replenishing medium in the first chamber 21. In some other embodiments, it may be different from the lithium replenishing medium in the first chamber 21. This can avoid the situation where a single lithium replenishing medium fails and fails to achieve the lithium replenishing effect, thus providing dual protection.

[0067] The fourth chamber 15 stores a fire-fighting medium, which can be the same as the fire-fighting medium in the second chamber 22. In some other embodiments, it can also be different from the fire-fighting medium in the second chamber 22. This can avoid the situation where a single fire-fighting medium fails and fails to achieve the fire-fighting effect, thus providing dual protection.

[0068] The third hole 111 can be provided on the inner wall of the housing 1 and extend radially along the housing 1. The third hole 111 serves to connect the third cavity 14 with the inner cavity 5 of the housing 1. The fourth hole 112 can be provided on the inner wall of the housing 1 and extend radially along the housing 1. The fourth hole 112 serves to connect the fourth cavity 15 with the inner cavity 5 of the housing 1.

[0069] A third membrane (not shown) can be disposed on the inner wall of the housing 1 and seal the third hole 111. Thus, the third membrane can block the third hole 111, thereby separating the third cavity 14 from the inner cavity 5 of the housing 1. Similarly, a fourth membrane (not shown) can be disposed on the inner wall of the housing 1 and seal the fourth hole 112. Thus, the fourth membrane can block the fourth hole 112, thereby separating the fourth cavity 15 from the inner cavity 5 of the housing 1.

[0070] After long-term use, as the gas produced inside the battery increases and accumulates, when the gas pressure reaches the first pressure, the third membrane will also be crushed under the action of the first pressure. At this time, the third cavity 14 is connected to the inner cavity 5 of the shell 1 through the third hole 111. The lithium replenishing medium in the third cavity 14 will flow into the inner cavity 5 of the shell 1 through the third hole 111, thereby replenishing the lithium ion content in the electrolyte.

[0071] Therefore, the lithium replenishing medium in the first cavity 21 and the third cavity 14 can simultaneously replenish lithium ions to the electrolyte in the shell 1 from the inside and outside directions, respectively, thereby ensuring the balance of lithium ion distribution and improving the lithium ion replenishment efficiency.

[0072] In addition, when the battery experiences thermal runaway or causes rapid internal gas generation due to abuse, the gas pressure inside the casing 1 will reach the second pressure. Under the action of the second pressure, the fourth membrane will rupture. At this time, the fourth cavity 15 can be connected to the inner cavity 5 of the casing 1 through the fourth hole 112. The fire-fighting medium in the fourth cavity 15 will flow into the casing 1 through the fourth hole 112 and play a role in fire extinguishing.

[0073] Therefore, the fire-fighting medium in the second chamber 22 and the fourth chamber can be released into the housing 1 simultaneously from the inside and outside, respectively, which can improve the fire-fighting efficiency and provide double protection, further ensuring the safety of battery use.

[0074] In some embodiments, in the inward and outward directions of the housing 1, the third cavity 14 corresponds to the second cavity 22, and the fourth cavity 15 corresponds to the first cavity 21. For example, as Figure 2 As shown, the column 2 may have only one first cavity 21 and one second cavity 22, wherein the first cavity 21 may be located below the second cavity 22. The shell 1 may have only one third cavity 14 and one fourth cavity 15, wherein the third cavity 14 may be located above the fourth cavity 15, and the third cavity 14 may be located on the outer periphery of the second cavity 22, and the fourth cavity 15 may be located on the outer periphery of the first cavity 21.

[0075] Therefore, the lithium replenishment medium and fire-fighting medium in column 2 can be staggered with the lithium replenishment medium and fire-fighting medium in shell 1 in the axial direction of the battery, so as to achieve the complementary effect between the inner and outer sides. This can improve the balance of lithium ion distribution after lithium replenishment and fire-fighting medium distribution during fire extinguishing, thereby improving the lithium replenishment and fire-fighting effects.

[0076] In some embodiments, the third cavity 14 can be an annular cavity, surrounding the outer periphery of the second cavity 22. This can increase the storage capacity of the lithium replenishment medium and facilitate external lithium replenishment from multiple directions. In this case, multiple third holes 111 arranged at intervals along the circumference need to be provided, which can further improve the uniformity of the lithium replenishment medium distribution and the lithium replenishment effect.

[0077] In some embodiments, the fourth cavity 15 can also be an annular cavity, surrounding the outer periphery of the first cavity 21. This can increase the storage capacity of the fire-fighting medium and facilitate the replenishment of the fire-fighting medium from multiple directions. In this case, multiple fourth holes 112 arranged at intervals along the circumference need to be provided, which can further improve the uniformity of the distribution of the fire-fighting medium and the fire-fighting effect.

[0078] In some embodiments, multiple first cavities 21 and multiple second cavities 22 are provided, and the multiple first cavities 21 and multiple second cavities 22 are arranged along the axial direction of the battery. Figure 2 The alternating arrangement of the upper and lower sections (in the middle and upper directions) can further improve the balance of the distribution of lithium replenishment medium and fire-fighting medium flowing out of column 2, thereby improving lithium replenishment efficiency and fire-fighting efficiency.

[0079] In other embodiments, multiple third cavities 14 and multiple fourth cavities 15 are provided, with the multiple third cavities 14 and multiple fourth cavities 15 arranged along the axial direction of the battery. Figure 2 The lithium replenishment medium and fire-fighting medium flowing out of the shell 1 are arranged alternately in the middle and upper directions, which can further improve the balance of the distribution of lithium replenishment medium and fire-fighting medium, thereby improving the lithium replenishment efficiency and fire-fighting efficiency.

[0080] In some embodiments, such as Figure 1 and Figure 2As shown, the housing 1 can be divided into an inner shell 11 and an outer shell 12. Both the inner shell 11 and the outer shell 12 can be cylindrical, with the outer shell 12 fitted around the outer periphery of the inner shell 11. The internal space of the inner shell 11 can form an inner cavity 5 for storing electrolyte. The column 2 can also be disposed within the inner shell 11. The third hole 111, the fourth hole 112, the third membrane, and the fourth membrane are all disposed within the inner shell 11. The third cavity 14 and the fourth cavity 15 are formed within the annular space between the inner shell 11 and the outer shell 12. This facilitates the processing and production of the housing 1, as well as the processing or arrangement of the first hole 211, the second hole 221, the third membrane, and the fourth membrane.

[0081] In some embodiments, the battery includes a first end cap 3 and a second end cap 4, an inner shell 11 and an outer shell 12 are both connected between the first end cap 3 and the second end cap 4, one end of the column 2 is abutted or connected to the first end cap 3, and the other end of the column 2 is abutted or connected to the second end cap 4.

[0082] For example, such as Figure 1 and Figure 2 As shown, the first end cap 3 can be installed on the top of the housing 1, and the first end cap 3 can be the positive terminal cap of the battery, and a positive terminal post can be installed inside the first end cap 3. The second end cap 4 can be installed on the bottom of the housing 1, and the second end cap 4 can be the negative terminal cap of the battery, and a negative terminal post can be installed inside the second end cap 4.

[0083] The top of the inner shell 11 and the top of the outer shell 12 can be connected and sealed with the first end cap 3, and the bottom of the inner shell 11 and the bottom of the outer shell 12 can be connected and sealed with the second end cap 4, thereby sealing the inner cavity 5 of the shell 1 to meet the need for filling electrolyte.

[0084] The top of column 2 can abut against the first end cap 3. For example, the first end cap 3 can have a slot, and the top of column 2 can be inserted into the slot to achieve a limiting and restraining effect. Similarly, the bottom of column 2 can abut against the second end cap 4. For example, the second end cap 4 can also have a slot, and the bottom of column 2 can be inserted into the slot to achieve a limiting and restraining effect. This ensures the structural stability of the assembled column 2.

[0085] Optionally, the column 2 can be made of an insulating material, such as plastic, to provide insulation and protection.

[0086] In some embodiments, the first hole 211 and the second hole 221 have different hole shapes. For example, the first hole 211 can be a square hole and the second hole 221 can be a circular hole. The first cavity 21 and the second cavity 22 can be distinguished by identifying the different hole shapes, which facilitates the addition of lithium replenishing medium to the first cavity 21 and the addition of fire-fighting medium to the second cavity 22.

[0087] In some embodiments, the third hole 111 and the fourth hole 112 have different hole shapes. For example, as... Figure 1 As shown, the third hole 111 can be a rectangular hole, such as... Figure 2 As shown, the fourth hole 112 can be a round hole, so the third cavity 14 and the fourth cavity 15 can be distinguished by identifying different hole shapes.

[0088] In some embodiments, such as Figure 2 As shown, the column 2 is provided with a first partition 23. The first partition 23 can be a baffle. The first partition 23 can be fixed inside the column 2. The first cavity 21 and the second cavity 22 are isolated through the first partition 23.

[0089] In some embodiments, such as Figure 2 As shown, the housing 1 is provided with a second partition 13, which can be an annular baffle. The second partition 13 can be fixed between the inner housing 11 and the outer housing 12. The third cavity 14 and the fourth cavity 15 are isolated through the second partition 13.

[0090] In some embodiments, the cavity wall of the first cavity 21 is provided with a plurality of first holes 211, and a first membrane covers the outer peripheral side of the column 2 and seals the plurality of first holes 211. For example, as Figure 2 As shown, multiple first holes 211 can be arranged at equal intervals along the axial direction of the column 2, and a first membrane can be used to seal all the first holes 211 corresponding to the first cavity 21. Therefore, during use, the outflow efficiency and distribution uniformity of the lithium replenishment medium can be improved, thereby enhancing the lithium replenishment effect. In some other embodiments, the multiple first holes 211 corresponding to the first cavity 21 can also be arranged at circumferential intervals.

[0091] In some embodiments, the cavity wall of the second cavity 22 is provided with a plurality of second holes 221, and the second membrane covers the outer peripheral side of the column 2 and seals the plurality of second holes 221. For example, as Figure 2 As shown, multiple second holes 221 can be arranged at equal intervals along the axial direction of the column 2. A second membrane can be used to seal all the second holes 221 corresponding to the second cavity 22. This improves the outflow efficiency and distribution uniformity of the fire-fighting medium during use, thereby enhancing the fire-fighting effect. In other embodiments, the multiple second holes 221 corresponding to the second cavity 22 can also be arranged at circumferential intervals.

[0092] In some embodiments, both the lithium replenishment medium and the fire-fighting medium can be liquid media, and the first membrane, the second membrane, the third membrane, and the fourth membrane can all be elastic liquid-proof membranes, for example, waterproof and breathable membranes, thereby achieving the effect of sealing off the liquid media.

[0093] The battery pack of the present invention is described below according to an embodiment of the present invention.

[0094] The battery pack of this invention includes multiple batteries, at least some of which can be the batteries described in any of the above embodiments. The multiple batteries are connected in series or in parallel to meet the power supply requirements of a large capacity.

[0095] The electrical equipment according to embodiments of the present invention is described below.

[0096] The electrical equipment in this embodiment of the invention can meet its power supply needs using the battery or battery pack described in any of the above embodiments. When using a battery, the electrical equipment can be a clock, remote control, or similar device; when using a battery pack, the electrical equipment can be a new energy vehicle, electric vehicle, or similar device. This satisfies the power needs of different scenarios.

[0097] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 this invention.

[0098] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0099] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0100] In this invention, unless otherwise explicitly 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," "over," and "on top" of 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.

[0101] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0102] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A battery, characterized in that, include: The housing has an internal cavity; A winding core, which is assembled inside the cavity of the housing; A column, which is supported inside the core to prevent the core from collapsing, is provided with a first cavity for storing lithium replenishment medium and a second cavity for storing fire-fighting medium. The first cavity has a first hole in its wall and the second cavity has a second hole in its wall. A first membrane is used to seal the first hole. The first membrane ruptures when subjected to a first pressure so that the lithium replenishment medium in the first cavity can flow into the inner cavity through the first hole. The second membrane blocks the second hole, and the second membrane ruptures when subjected to a second pressure so that the fire-fighting medium in the second cavity can flow into the inner cavity through the second hole, and the second pressure is greater than the first pressure.

2. The battery according to claim 1, characterized in that, Includes a third membrane, and the housing has a third cavity for storing lithium replenishment medium. The cavity wall of the third cavity has a third hole, and the third membrane blocks the third hole. The third membrane ruptures when subjected to a third pressure so that the lithium replenishment medium in the third cavity can flow into the inner cavity through the third hole. The third pressure is less than the second pressure.

3. The battery according to claim 1, characterized in that, The device includes a fourth membrane, and the housing has a fourth cavity for storing fire-fighting media. The cavity wall of the fourth cavity has a fourth hole, and the fourth membrane blocks the fourth hole. When the fourth membrane is subjected to a fourth pressure, it ruptures so that the fire-fighting media in the fourth cavity can flow into the inner cavity through the fourth hole. The fourth pressure is greater than the first pressure.

4. The battery according to claim 1, characterized in that, It includes a third membrane and a fourth membrane. The housing is provided with a third cavity for storing lithium replenishment medium and a fourth cavity for storing fire-fighting medium. The cavity wall of the third cavity is provided with a third hole, and the cavity wall of the fourth cavity is provided with a fourth hole. The third membrane blocks the third hole, and the third membrane ruptures when subjected to the first pressure so that the lithium replenishment medium in the third cavity can flow into the inner cavity through the third hole; The fourth membrane blocks the fourth hole, and the fourth membrane ruptures when subjected to the second pressure so that the fire-fighting medium in the fourth cavity can flow into the inner cavity through the fourth hole.

5. The battery according to claim 4, characterized in that, In the inward and outward directions of the housing, the third cavity corresponds to the second cavity, and the fourth cavity corresponds to the first cavity.

6. The battery according to claim 5, characterized in that, The third cavity is an annular cavity, and the third cavity surrounds the outer periphery of the second cavity; And / or, the fourth cavity is an annular cavity, and the fourth cavity surrounds the outer periphery of the first cavity.

7. The battery according to claim 5, characterized in that, Both the first cavity and the second cavity are provided in multiples, and the multiple first cavities and multiple second cavities are arranged alternately along the axial direction of the battery; And / or, both the third cavity and the fourth cavity are provided in multiples, and the multiple third cavities and the multiple fourth cavities are arranged alternately along the axial direction of the battery.

8. The battery according to claim 4, characterized in that, The housing includes an inner shell and an outer shell. The outer shell is fitted onto the outer periphery of the inner shell. The inner cavity is formed inside the inner shell. The third hole, the fourth hole, the third membrane, and the fourth membrane are all disposed in the inner shell. The third cavity and the fourth cavity are formed between the inner shell and the outer shell.

9. The battery according to claim 8, characterized in that, It includes a first end cap and a second end cap, with the inner shell and the outer shell both connected between the first end cap and the second end cap. One end of the column is abutted or connected to the first end cap, and the other end of the column is abutted or connected to the second end cap.

10. The battery according to claim 4, characterized in that, The first hole and the second hole have different hole shapes, and / or the third hole and the fourth hole have different hole shapes.

11. The battery according to claim 4, characterized in that, The column body is provided with a first partition, and the first cavity and the second cavity are separated by the first partition; And / or, the housing is provided with a second partition, and the third cavity and the fourth cavity are isolated by the second partition.

12. The battery according to claim 1, characterized in that, The cavity wall of the first cavity is provided with a plurality of first holes, and the first membrane covers the outer peripheral side of the column and seals the plurality of first holes; And / or, the cavity wall of the second cavity is provided with a plurality of second holes, and the second membrane covers the outer peripheral side of the column and seals the plurality of second holes.

13. The battery according to claim 1, characterized in that, The column is made of insulating material.

14. The battery according to any one of claims 1-13, characterized in that, The lithium replenishment medium includes at least one of the following: lithium powder, lithium salt solution; And / or, the fire-fighting medium includes at least one of the following: perfluorohexanone, alkyl phosphate, or heptafluoropropane.

15. A battery pack, characterized in that, Includes the battery as described in any one of claims 1-14 above.

16. An electrical appliance, characterized in that, It includes the battery as described in any one of claims 1-14 above, or the battery pack as described in claim 15 above.

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