End cover module, battery, battery pack and electrical equipment

Abstract

The present invention discloses an end cover module, a battery, a battery pack and an electrical device. The end cover module is used for the battery and includes a lithium supplement container, a fire protection container, a cover body, a current collector plate and a connecting member. The lithium supplement container is used for storing a lithium supplement medium, the fire protection container is used for storing a fire protection medium, the current collector plate is used to face the inner side of the battery. The lithium supplement container and the fire protection container are arranged between the cover body and the current collector plate, and the lithium supplement container is located between the current collector plate and the fire protection container. The connecting member is connected between the cover body and the current collector plate, and the connecting member is deformable to cause the current collector plate to act on the lithium supplement container to break the lithium supplement container to release the lithium supplement medium when the internal air pressure of the battery reaches a first pressure, and to cause the current collector plate to act on the fire protection container to break the fire protection container to release the fire protection medium when the internal air pressure of the battery reaches a second pressure, and the second pressure is greater than the first pressure. The end cover module of the present invention has both a lithium supplement function and a fire protection function, realizes secondary lithium supplementation of the battery, and ensures the safety of battery use.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular, to an end - cover module, a battery, a battery pack including the battery, and an electrical device. Background Art

[0002] In recent years, with the country's promotion of new energy, batteries have been applied in more and more fields. At present, when the single - cell batteries on the market are in use, the consumption of lithium ions will occur, and the lithium ions cannot be replenished subsequently, resulting in a short service life of the batteries. Secondly, the batteries in the related technologies also have problems such as thermal runaway and bulging, and there are relatively large potential safety hazards during the use of the batteries. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related technologies to some extent.

[0004] To this end, an embodiment of the present invention provides an end - cover module, which has both the function of lithium supplementation and the function of fire protection. It can realize the secondary lithium supplementation of the battery, thereby improving the problems of short battery life and serious attenuation. Moreover, when the battery has thermal runaway or instant gas production, it has the function of fire extinguishing and ensures the safety of battery use.

[0005] An embodiment of the present invention also provides a battery including the above - mentioned end - cover module.

[0006] An embodiment of the present invention also provides a battery pack including the above - mentioned battery.

[0007] An embodiment of the present invention also provides an electrical device including the above - mentioned battery or battery pack.

[0008] The end - cover module of the embodiment of the present invention is used for a battery and includes:

[0009] A lithium - supplementation container for storing a lithium - supplementation medium;

[0010] A fire - protection container for storing a fire - protection medium;

[0011] A cover body and a current - collecting plate, the current - collecting plate is used to face the inner side of the battery, the lithium - supplementation container and the fire - protection container are arranged between the cover body and the current - collecting plate, and the lithium - supplementation container is located between the current - collecting plate and the fire - protection container;

[0012] A connecting piece, which is connected between the cover body and the current collector plate, and the connecting piece is deformable to cause the current collector plate to act on the lithium supplement container to break the lithium supplement container to release the lithium supplement medium when the internal air pressure of the battery reaches a first pressure, and to cause the current collector plate to act on the fire extinguishing container to break the fire extinguishing container to release the fire extinguishing medium when the internal air pressure of the battery reaches a second pressure, and the second pressure is greater than the first pressure.

[0013] The end cover module of the present invention has both a lithium supplement function and a fire extinguishing function, can realize secondary lithium supplementation of the battery, and thus can improve the problems of short battery life and serious attenuation. Moreover, when the battery undergoes thermal runaway or instant gas production, it has a fire extinguishing function, ensuring the safety of battery use.

[0014] In some embodiments, a protrusion is provided on the current collector plate, the protrusion is provided on the side of the current collector plate facing the cover body, and at least a part of the protrusion is used to act on the lithium supplement container or the fire extinguishing container to break the lithium supplement container or the fire extinguishing container.

[0015] In some embodiments, the lithium supplement container is provided with a first hole, the first hole is arranged opposite to the protrusion, and the first hole is used for the protrusion to be inserted into to prevent the protrusion from breaking the lithium supplement container when the internal air pressure of the battery does not reach the first pressure.

[0016] In some embodiments, the fire extinguishing container is provided with a second hole, the second hole is arranged opposite to the protrusion, and the second hole is used for the protrusion to be inserted into to prevent the protrusion from breaking the fire extinguishing container when the internal air pressure of the battery does not reach the second pressure.

[0017] In some embodiments, the protrusion includes a main body portion and a pointed portion, the pointed portion is provided on the outer peripheral side of the main body portion, the lithium supplement container is provided with a first hole, the fire extinguishing container is provided with a second hole, the main body portion is used to extend into the first hole or the second hole, and the pointed portion is used to pierce the lithium supplement container from the hole wall of the first hole or pierce the fire extinguishing container from the hole wall of the second hole.

[0018] In some embodiments, the cross-sectional dimension of the main body portion gradually decreases along the direction away from the current collector plate;

[0019] And / or, there are multiple pointed portions, and the multiple pointed portions are arranged at intervals along the circumferential direction of the main body portion.

[0020] In some embodiments, the current collector plate is provided with a third hole, the third hole penetrates the protrusion, and the third hole is used for the lithium supplement medium or the fire extinguishing medium to flow through the current collector plate.

[0021] In some embodiments, the aperture diameter of the third hole gradually increases in a direction away from the cover body.

[0022] In some embodiments, the end cap module includes a separator disposed between the cover body and the current collector plate, the separator is connected to the cover body, the lithium supplementation container is disposed between the separator and the current collector plate, and the fire extinguishing container is disposed between the separator and the cover body.

[0023] In some embodiments, the separator is provided with a fourth hole that penetrates the separator, and the fourth hole is used for the convex portion to pass through the separator when the internal air pressure of the battery reaches the second pressure.

[0024] In some embodiments, there are a plurality of the connecting members, and the plurality of connecting members are arranged at intervals along the circumferential direction of the end cap module. One end of each connecting member is connected to the cover body, and the other end of each connecting member is connected to the current collector plate. The lithium supplementation container and the fire extinguishing container are disposed in the space surrounded by the plurality of connecting members.

[0025] In some embodiments, the lithium supplementation container is elastically deformable, and / or the fire extinguishing container is elastically deformable.

[0026] In some embodiments, the lithium supplementation medium includes at least one of the following: lithium powder, lithium salt solution;

[0027] and / or, the fire extinguishing medium includes at least one of the following: perfluoromethyl isopropyl ketone, alkyl phosphate, heptafluoropropane.

[0028] The battery according to an embodiment of the present invention includes the end cap module as described in any one of the above embodiments.

[0029] In some embodiments, the battery includes a housing and two of the end cap modules. The two end cap modules are respectively a first module and a second module. The first module is disposed at one end of the housing and forms a positive electrode, and the lithium supplementation container, the fire extinguishing container, and the current collector plate of the first module are located inside the housing. The second module is disposed at the other end of the housing and forms a negative electrode, and the lithium supplementation container, the fire extinguishing container, and the current collector plate of the second module are located inside the housing.

[0030] The battery pack according to an embodiment of the present invention includes a plurality of the batteries as described in any one of the above embodiments, and the plurality of batteries are arranged in series or in parallel.

[0031] The electrical device according to an embodiment of the present invention includes the battery as described in any one of the above embodiments, or includes the battery pack as described in any one of the above embodiments. Description of the Drawings

[0032] Figure 1It is a sectional perspective schematic diagram of the end - cap module according to an embodiment of the present invention.

[0033] Figure 2 It is an exploded schematic diagram of a partial battery according to an embodiment of the present invention.

[0034] Figure 3 It is an exploded schematic diagram of the battery according to an embodiment of the present invention.

[0035] Reference numerals:

[0036] End - cap module 100; First module 101; Second module 102;

[0037] Lithium - supplementing container 1; First hole 11;

[0038] Fire - fighting container 2; Second hole 21;

[0039] Current - collecting plate 3; Protrusion 31; Main body part 311; Tip part 312; Third hole 32;

[0040] Cover body 4;

[0041] Connecting piece 5;

[0042] Partition piece 6;

[0043] Terminal post 7;

[0044] Shell 200. Detailed implementation manners

[0045] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] The end - cap module 100 of the embodiment of the present invention is mainly applied to a battery. For example, it can be fixed on the shell 200 of the battery. When in use, lithium supplementation and fire - fighting of the battery can be achieved through the end - cap module 100. As Figure 1 shown, the end - cap of the embodiment of the present invention mainly includes a lithium - supplementing container 1, a fire - fighting container 2, a cover body 4, a current - collecting plate 3 and a connecting piece 5.

[0047] The lithium - supplementing container 1 can be a capsule - type sealed container. The lithium - supplementing container 1 is used to store a lithium - supplementing medium. The lithium - supplementing medium can be a lithium - salt solution, specifically, a lithium - supplementing electrolyte solution. In some other embodiments, the lithium - supplementing medium can also be lithium powder, a mixture of lithium powder and lithium salt, etc., which are media that can supplement lithium ions to the electrolyte.

[0048] The fire extinguishing container 2 can also be a capsule-type sealed container. The fire extinguishing container 2 is used to store a fire extinguishing medium, which can be perfluoromethylcyclohexanone. In some other embodiments, the fire extinguishing medium can also be a medium with a flame retardant effect such as alkyl phosphate or heptafluoropropane, or a mixture of multiple flame retardant media.

[0049] As Figure 1 shown, the current collector plate 3 can generally be a metal disc, and the cover body 4 can be arranged above the current collector plate 3 and directly opposite to the current collector plate 3 up and down. When installing the end cap module 100, the current collector plate 3 needs to face the inner side of the battery, that is, the cover body 4 is located on the outer side of the current collector plate 3, and the end of the battery can be sealed through the cover body 4.

[0050] Both the lithium supplement container 1 and the fire extinguishing container 2 are arranged between the cover body 4 and the current collector plate 3, and the lithium supplement container 1 is located between the current collector plate 3 and the fire extinguishing container 2. For example, as Figure 1 shown, the lithium supplement container 1 can be arranged above the current collector plate 3, the fire extinguishing container 2 can be arranged above the lithium supplement container 1, and the cover body 4 can be arranged above the fire extinguishing container 2.

[0051] The connecting piece 5 can also be a component that can be compressed or bent, such as a corrugated pipe. As Figure 1 shown, the bottom end of the connecting piece 5 can be fixedly connected to the current collector plate 3, and the top end of the connecting piece 5 can be fixedly connected to the cover body 4. When installing the end cap module 100, the current collector plate 3 can be inserted into the housing 200 of the battery. When the internal air pressure in the battery increases, the higher air pressure can push the current collector plate 3 to move. At this time, the connecting piece 5 will be compressed or bent, thus meeting the need for the movement of the current collector plate 3.

[0052] The connecting piece 5 can have good elastic deformation performance. For example, the connecting piece 5 can be a spring. On the one hand, the elastic deformation of the connecting piece 5 can meet the need for the current collector plate 3 to move towards the end cap. On the other hand, during installation, a certain elastic pre-tightening force can be applied to the current collector plate 3 through the connecting piece 5, so that the current collector plate 3 can be held in the corresponding position, thereby improving the assembly compactness of the current collector plate 3.

[0053] As the battery is used, the internal air pressure of the battery will increase. The increased air pressure will push the current collector plate 3, so that the current collector plate 3 can move towards the cover body 4. When the current collector plate 3 moves to a certain position, at this time, the internal air pressure of the battery reaches the first pressure (i.e., the pressure proximity value at which the current collector plate 3 can break or pierce the lithium supplement container 1), and the current collector plate 3 can break or pierce the lithium supplement container 1, so that the lithium supplement medium in the lithium supplement container 1 can be released, thereby realizing the supplement of lithium ions in the electrolyte.

[0054] When the battery has thermal runaway or produces gas rapidly and severely due to abuse, the collecting tray 3 will continue to move toward the cover 4 under the action of air pressure. When the collecting tray 3 moves to a certain position, the internal air pressure of the battery reaches the second pressure (i.e., the value close to the air pressure at which the collecting tray 3 can rupture the fire container 2). The collecting tray 3 can crush or puncture the fire container 2, thereby releasing the fire-fighting medium in the fire container 2, and the released fire-fighting medium can be used to extinguish the fire.

[0055] It should be noted that in the embodiment of the present invention, the second pressure should be greater than the first pressure. Therefore, compared with the lithium replenishing container 1, the fire fighting container 2 is less likely to be broken, thereby ensuring the stability of the battery during long-term use.

[0056] The end cover module 100 of the present invention has both lithium replenishment function and fire protection function. When assembled on the battery, it can realize secondary lithium replenishment of the battery, thereby improving the problems of short battery life and severe attenuation, playing a decisive role in enhancing the battery cell life, and can also reduce the user's electricity cost.

[0057] Secondly, when the battery experiences thermal runaway or instantaneous gas production, the released fire-fighting medium has a fire-fighting extinguishing function, thereby ensuring the safety of battery use and achieving the purpose of ensuring battery fire safety.

[0058] In addition, during use, the lithium replenishment container 1 and the fire-fighting container 2 adopt a two-stage rupture graded design, thereby ensuring the structural stability of the fire-fighting container 2 (it will only rupture and release the fire-fighting medium under extreme conditions), avoiding interference between the lithium replenishment process and the fire-fighting process, and improving the independence of the operation.

[0059] In some embodiments, a protrusion 31 is provided on the collecting plate 3, and the protrusion 31 is provided on the side of the collecting plate 3 facing the cover body 4, and at least part of the protrusion 31 is used to act on the lithium replenishment container 1 or the fire fighting container 2 to achieve the rupture of the lithium replenishment container 1 or the fire fighting container 2.

[0060] For example, Figure 1 As shown, the protrusion 31 can be integrally formed above the current collecting plate 3, and the protrusion 31 can be generally conical. As the current collecting plate 3 moves toward the cover body 4, the protrusion 31 can puncture the lithium replenishment container 1 or the fire fighting container 2, thereby facilitating the puncturing of the lithium replenishment container 1 or the fire fighting container 2 on the one hand, and on the other hand, it can make up for the distance between the current collecting plate 3 and the cover body 4, thereby avoiding the situation where the current collecting plate 3 is far away from the cover body 4 and a larger air pressure is required to puncture the lithium replenishment container 1 or the fire fighting container 2.

[0061] In some embodiments, Figure 1As shown, the lithium replenishing container 1 can be generally annular, and the internal space of the lithium replenishing container 1 forms a first hole 11. The first hole 11 and the protrusion 31 can be arranged relatively in the up and down directions. As the current collecting plate 3 moves upward (moves toward the cover body 4), the top of the protrusion 31 can be first inserted into the first hole 11, so as to avoid the situation where the protrusion 31 breaks the lithium replenishing container 1 when the internal air pressure of the battery does not reach the first pressure, which plays a certain avoidance effect, thereby ensuring the stability of the structure and facilitating the accuracy of lithium replenishment.

[0062] In some embodiments, Figure 1 As shown, the fire container 2 can also be roughly annular, and the internal space of the fire container 2 forms a second hole 21. The second hole 21 and the protrusion 31 can be arranged relatively in the up and down directions. As the collecting plate 3 moves upward (moves toward the cover body 4), the top of the protrusion 31 can be first inserted into the second hole 21, thereby avoiding the situation where the protrusion 31 breaks the lithium filling container 1 when the internal air pressure of the battery does not reach the second pressure, playing a certain avoidance effect, thereby ensuring the stability of the structure, and is also conducive to achieving the accuracy of fire fighting.

[0063] In some embodiments, the protrusion 31 includes a main body 311 and a tip 312, the tip 312 is arranged on the outer peripheral side of the main body 311, the lithium replenishing container 1 is provided with a first hole 11, and the fire fighting container 2 is provided with a second hole 21, the main body 311 is used to extend into the first hole 11 or the second hole 21, and the tip 312 is used to pierce the lithium replenishing container 1 from the hole wall of the first hole 11 or pierce the fire fighting container 2 from the hole wall of the second hole 21.

[0064] For example, the main body 311 may be columnar, conical, etc. The main body 311 may be integrally formed and arranged above the current collecting plate 3, and the tip 312 may be a needle-shaped protrusion or a thorn-shaped protrusion, and the tip 312 may be integrally formed and arranged on the outer peripheral side of the main body 311. As the current collecting plate 3 approaches the cover body 4, the main body 311 may extend into the first hole 11 of the lithium replenishing container 1 or the second hole 21 of the fire fighting container 2, and the tip 312 may pierce the container wall of the lithium replenishing container 1 surrounding the first hole 11 or pierce the container wall of the fire fighting container 2 surrounding the second hole 21, thereby releasing the lithium replenishing medium or the fire fighting medium.

[0065] Therefore, by means of the plug-in cooperation between the main body 311 and the first hole 11 or the second hole 21 , the guiding property of the movement of the collecting plate 3 can be improved while achieving the avoidance effect, thereby ensuring the stability of the puncture of the tip 312 .

[0066] Optionally, a plurality of the tips 312 may be provided, and the plurality of tips 312 are arranged at equal intervals along the circumference of the main body 311. Thus, on the one hand, the puncture effect can be ensured, and the puncture failure of a single tip 312 can be avoided; on the other hand, the number of outlets formed after puncture can be increased, thereby improving the discharge efficiency of the lithium supplement medium and the fire fighting medium and the balance of the distribution after discharge.

[0067] In some embodiments, the cross-sectional size of the main body 311 gradually decreases in a direction away from the collecting plate 3. Figure 1 As shown, the main body 311 can be generally conical, that is, the cross-sectional size of the main body 311 gradually decreases from bottom to top. Therefore, on the one hand, the conical circumferential surface of the main body 311 can play a guiding effect, thereby facilitating the insertion of the main body 311 into the first hole 11 or the second hole 21. On the other hand, the gradual change in size can play the effect of supporting the lithium replenishing container 1 from the first hole 11 to the outside or supporting the fire-fighting container 2 from the second hole 21 to the outside, thereby ensuring the sufficiency of the action between the tip 312 and the lithium replenishing container 1 or the fire-fighting container 2, so that the protrusion 31 has an internal expansion and tearing effect on the rupture of the lithium replenishing container 1 or the fire-fighting container 2, thereby ensuring the drainage efficiency.

[0068] In some embodiments, Figure 1 As shown, the current collecting plate 3 is provided with a third hole 32, and the third hole 32 can penetrate the protrusion 31 in the up-down direction. When the lithium supplement container 1 or the fire fighting container 2 is broken, the lithium supplement medium or the fire fighting medium can flow through the current collecting plate 3 through the third hole 32, thereby facilitating the delivery to the electrolyte and ensuring the drainage efficiency. It can be understood that when the current collecting plate 3 is installed, a certain gap can be reserved between the peripheral side of the current collecting plate 3 and the battery shell 200, and the lithium supplement medium or the fire fighting medium can also be released through the gap between the current collecting plate 3 and the shell 200.

[0069] In some embodiments, the diameter of the third hole 32 gradually increases in a direction away from the cover body 4. Figure 1 As shown, the third hole 32 can be generally a tapered hole, that is, the aperture of the third hole 32 can gradually increase from top to bottom. Thus, on the one hand, the bottom outlet of the third hole 32 can cover a wider area, thereby improving the uniformity of the distribution of the lithium supplement medium or the fire fighting medium, and further improving the lithium supplement effect or the fire fighting effect; on the other hand, the liquid sealing effect can be reduced, thereby ensuring the smoothness of the lithium supplement medium and the fire fighting medium flowing through the third hole 32.

[0070] In some embodiments, Figure 1As shown, the end cap module 100 includes a separator 6. The separator 6 can be a separator plate. The separator 6 is disposed between the cover body 4 and the current collector plate 3, and the separator 6 is connected to the cover body 4. For example, the separator 6 can be fixedly connected to the cover body 4 through a plurality of connecting rods, and the plurality of connecting rods can be arranged at intervals along the circumferential direction of the separator 6. The separator 6 can separate the space between the cover body 4 and the current collector plate 3 into two independent spaces. Among them, the lithium supplement container 1 can be disposed in the independent space between the separator 6 and the current collector plate 3, and the fire protection container 2 can be disposed in the independent space between the separator 6 and the cover body 4.

[0071] Thereby, the lithium supplement container 1 and the fire protection container 2 can be relatively independent, avoiding the situation that when the current collector plate 3 acts on the lithium supplement container 1, it is likely to indirectly act on the fire protection container 2, and ensuring the stability of the use state of the fire protection container 2 when it does not need to be broken.

[0072] In some embodiments, the separator 6 is provided with a fourth hole (not shown). The fourth hole penetrates through the separator 6, and the fourth hole is used for the protrusion 31 to pass through the separator 6 when the internal air pressure of the battery reaches the second pressure, which can achieve the effect of avoiding the protrusion 31, and avoiding the situation that the setting of the separator 6 is likely to cause a large blockage to the movement of the current collector plate 3.

[0073] Optionally, the aperture of the fourth hole is larger than the aperture of the second hole 21. Thereby, it is convenient for the protrusion 31 to pass through the fourth hole and insert into the second hole 21, avoiding the situation that the smaller aperture of the fourth hole is likely to cause blockage to the protrusion 31.

[0074] In some embodiments, as Figure 1 shown, there are a plurality of connecting members 5. The plurality of connecting members 5 are arranged at intervals along the circumferential direction of the end cap module 100. The top end of each connecting member 5 can be connected to the cover body 4, and the bottom end of each connecting member 5 can be connected to the current collector plate 3. The lithium supplement container 1 and the fire protection container 2 are disposed in the space surrounded by the plurality of connecting members 5. Thereby, the structural stability of the connection between the current collector plate 3 and the cover body 4 can be improved.

[0075] It can be understood that in some other embodiments, the connecting member 5 can also be cylindrical. At this time, the lithium supplement container 1 and the fire protection container 2 can be disposed in the internal space of the connecting member 5.

[0076] In some embodiments, the lithium supplement container 1 can be elastically deformed. For example, the material of the lithium supplement container 1 can be a plastic film, so that it can be flattened under the action of the current collector plate 3, which is convenient for completely discharging the lithium supplement medium, and avoiding the situation that the relatively hard texture of the lithium supplement container 1 is likely to cause blockage to the movement of the current collector plate 3.

[0077] In some embodiments, the fire extinguishing container 2 can be elastically deformed. For example, the material of the fire extinguishing container 2 can be a plastic film, so that it can be flattened under the action of the current collecting tray 3, which facilitates the complete discharge of the fire extinguishing medium and avoids the situation that the relatively hard texture of the fire extinguishing container 2 is likely to block the movement of the current collecting tray 3.

[0078] In some embodiments, the lithium supplement container 1 and the fire extinguishing container 2 can also be broken by extrusion. For example, the maximum pressure that the lithium supplement container 1 can withstand can be less than the maximum pressure that the fire extinguishing container 2 can withstand. As the current collecting tray 3 moves towards the cover body 4, the current collecting tray 3 can simultaneously extrude the lithium supplement container 1 and the fire extinguishing container 2. Since the pressure that the lithium supplement container 1 can withstand is relatively small, the lithium supplement container 1 will rupture first, thereby realizing the lithium supplement effect. As the current collecting tray 3 continues to move, the fire extinguishing container 2 will be fractured, thereby realizing the fire extinguishing effect.

[0079] The battery according to the embodiments of the present invention will be described below.

[0080] As Figure 2 shown, the battery according to the embodiments of the present invention includes an end cover module 100, and the end cover module 100 can be the end cover module 100 described in any of the above embodiments. The battery may include a housing 200 for filling with electrolyte, and the end cover module 100 can be provided at the end of the housing 200 of the battery. The battery can specifically be a lithium battery or other batteries that require the use of the end cover module 100. Of course, it can also be other batteries that require the use of the end cover module 100. The battery according to the embodiments of the present invention can realize the lithium supplement and fire extinguishing functions by means of the end cover module 100.

[0081] In some embodiments, as Figure 3 shown, the battery includes a housing 200 and two end cover modules 100. The housing 200 can be cylindrical. The two end cover modules 100 are respectively a first module 101 and a second module 102. The first module 101 is provided at the top port of the housing 200 and forms a positive electrode, and the lithium supplement container 1, the fire extinguishing container 2, and the current collecting tray 3 of the first module 101 are assembled in the housing 200. The second module 102 is provided at the bottom port of the housing 200 and forms a negative electrode, and the lithium supplement container 1, the fire extinguishing container 2, and the current collecting tray 3 of the second module 102 are assembled in the housing 200.

[0082] Thus, the lithium supplement medium can be supplemented or the fire extinguishing medium can be released in two directions, thereby fully ensuring the uniformity of the distribution of the lithium supplement medium and also improving the fire extinguishing effect.

[0083] As Figure 1 shown, a pole column 7 can be assembled at the central position of the cover body 4. The pole column 7 assembled on the cover body 4 of the first module 101 can form a positive pole column, and the pole column 7 assembled on the cover body 4 of the second module 102 can form a negative pole column.

[0084] In some embodiments, the separator 6 can also be fixedly connected to the housing 200 of the battery. For example, the circumferential edge of the separator 6 can be connected to the inner wall of the housing 200, thereby ensuring the structural stability of the fixed separator 6.

[0085] The battery pack of the embodiment of the present invention will be described below.

[0086] The battery pack of the embodiment of the present invention includes a plurality of batteries. At least some of the batteries can be the batteries described in any of the above embodiments, and the plurality of batteries are connected in series or in parallel, so as to meet the power supply requirements of large capacity.

[0087] The electrical equipment of the embodiment of the present invention will be described below.

[0088] For the electrical equipment of the embodiment of the present invention, the electrical equipment can meet the power supply requirements through the battery or the battery pack in any of the above embodiments. When using a battery, the electrical equipment can be devices such as a clock and a remote control. When using a battery pack, the electrical equipment can be a new energy vehicle, an electric vehicle, etc., thereby meeting the power consumption requirements in different scenarios.

[0089] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0090] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0091] In the present invention, unless otherwise clearly specified or defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] In the present invention, unless otherwise clearly specified or defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0093] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0094] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present invention.

Claims

1. A end cap module, characterized in that, For a battery and comprising: A lithium supplement container for storing a lithium supplement medium; A fire protection container for storing a fire protection medium; A cover body and a current collector plate, the current collector plate being for facing the inner side of the battery, the lithium supplement container and the fire protection container being provided between the cover body and the current collector plate, and the lithium supplement container being located between the current collector plate and the fire protection container; A connecting member connected between the cover body and the current collector plate, one end of the connecting member being connected to the cover body, the other end of the connecting member being connected to the current collector plate, and the connecting member being deformable to cause the current collector plate to act on the lithium supplement container to break the lithium supplement container to release the lithium supplement medium when the internal air pressure of the battery reaches a first pressure, and to cause the current collector plate to act on the fire protection container to break the fire protection container to release the fire protection medium when the internal air pressure of the battery reaches a second pressure, the second pressure being greater than the first pressure.

2. The end cap module according to claim 1, wherein A convex portion is provided on the current collector plate, the convex portion being provided on the side of the current collector plate facing the cover body, and at least part of the convex portion is for acting on the lithium supplement container or the fire protection container to achieve breaking of the lithium supplement container or the fire protection container.

3. The end cap module according to claim 2, characterized in that, The lithium supplement container is provided with a first hole, the first hole being arranged opposite to the convex portion, and the first hole is for the convex portion to be inserted into to avoid the convex portion breaking the lithium supplement container when the internal air pressure of the battery does not reach the first pressure.

4. The end cap module according to claim 2, wherein The fire protection container is provided with a second hole, the second hole being arranged opposite to the convex portion, and the second hole is for the convex portion to be inserted into to avoid the convex portion breaking the fire protection container when the internal air pressure of the battery does not reach the second pressure.

5. The end cap module according to claim 2, wherein The convex portion includes a main body portion and a pointed portion, the pointed portion being provided on the outer peripheral side of the main body portion, the lithium supplement container being provided with a first hole, the fire protection container being provided with a second hole, the main body portion being for extending into the first hole or the second hole, and the pointed portion being for piercing the lithium supplement container from the hole wall of the first hole or piercing the fire protection container from the hole wall of the second hole.

6. The end cap module according to claim 5, characterized in that, The cross-sectional dimension of the main body portion gradually becomes smaller along the direction away from the current collector plate; And / or, there are multiple pointed portions, and the multiple pointed portions are arranged at intervals along the circumferential direction of the main body portion.

7. The end cap module according to claim 2, characterized in that, The current collector plate is provided with a third hole, the third hole penetrating through the convex portion, and the third hole is for the lithium supplement medium or the fire protection medium to flow through the current collector plate.

8. The end cap module according to claim 7, characterized in that, The aperture of the third hole gradually becomes larger along the direction away from the cover body.

9. The end cap module according to claim 2, wherein Including a separator provided between the cover body and the current collector plate, and the separator being connected to the cover body, the lithium supplement container being provided between the separator and the current collector plate, and the fire protection container being provided between the separator and the cover body.

10. The end cap module according to claim 9, characterized in that, The separator is provided with a fourth hole, the fourth hole penetrating through the separator, and the fourth hole is for the convex portion to pass through the separator when the internal air pressure of the battery reaches the second pressure.

11. The end cap module according to claim 1, characterized in that, There are a plurality of the connecting members, and the plurality of connecting members are arranged at intervals along the circumferential direction of the end cover module. One end of each connecting member is connected to the cover body, and the other end of each connecting member is connected to the current collector plate. The lithium supplement container and the fire extinguishing container are arranged in the space surrounded by the plurality of connecting members.

12. The end cap module according to claim 1, characterized in that, The lithium supplement container is elastically deformable, and / or the fire extinguishing container is elastically deformable.

13. The end cap module according to any one of claims 1-12, characterized in that, The lithium supplement medium includes at least one of the following: lithium powder, lithium salt solution; and / or, the fire extinguishing medium includes at least one of the following: perfluoromethyl isopropyl ketone, alkyl phosphate, heptafluoropropane.

14. A battery, characterized in that, It includes the end cover module according to any one of the above claims 1-13.

15. The battery according to claim 14, wherein It includes a housing and two of the end cover modules. The two end cover modules are respectively a first module and a second module. The first module is arranged at one end of the housing and forms a positive electrode, and the lithium supplement container, the fire extinguishing container, and the current collector plate of the first module are located inside the housing. The second module is arranged at the other end of the housing and forms a negative electrode, and the lithium supplement container, the fire extinguishing container, and the current collector plate of the second module are located inside the housing.

16. A battery pack, characterized in that, It includes a plurality of batteries according to the above claim 14 or 15, and the plurality of batteries are arranged in series or in parallel.

17. An electrical device, characterized in that, It includes a battery according to the above claim 14 or 15, or includes a battery pack according to the above claim 16.

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