Battery cover plate, battery cell, electrical storage device, and electrical device

Abstract

The utility model discloses a battery cover plate, a battery monomer and an electricity storage device or an electricity utilization device, and relates to the technical field of batteries. The battery cover plate comprises a cover plate body, a protection bracket and at least one flame-retardant part, wherein a pole hole is formed in the cover plate body; the protection bracket is mounted on one side, facing a battery cell, of the cover plate body, and a protection cavity is formed in the protection bracket so as to protect the joint of a tab and a pole of the battery cell; and the at least one flame-retardant part is arranged on the protection bracket. According to the battery cover plate disclosed by the embodiment of the utility model, the protection bracket is arranged to form the protection cavity, so that the connection between the pole and the tab can be effectively protected, and the stability and the reliability of electrical connection are ensured. By arranging the flame-retardant part, flame-retardant treatment can be carried out on a fire source and a surrounding area when the battery cell generates overheat or open fire, so that the safety performance of the battery monomer is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cover, a battery cell, a power storage device, and an electric power consumption device. Background Art

[0002] In recent years, safety incidents caused by lithium batteries have become a frequent and significant issue. These incidents stem from the fact that lithium batteries can experience thermal runaway when subjected to extreme conditions such as electrical, thermal, or mechanical abuse. Thermal runaway occurs when the battery's internal temperature rises dramatically, triggering a chain reaction of heat and gas production that can ultimately lead to fire or even explosion, posing a serious threat to the safety of lithium batteries.

[0003] Therefore, how to improve the safety of battery use without affecting the battery cells is an urgent problem to be solved. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, a first aspect of the present invention is to provide a battery cover plate, which can improve the safety performance of a battery cell.

[0005] A second aspect of the present invention is to provide a battery cell.

[0006] A third aspect of the present invention is to provide a power storage device.

[0007] A fourth aspect of the present invention aims to provide an electrical device.

[0008] According to the battery cover of the embodiment of the first aspect of the present invention, it includes: a cover body, which is provided with a pole hole; a protective bracket, which is installed on the side of the cover body facing the battery cell, and is provided with a protective cavity to protect the connection between the pole ear and the pole of the battery cell; at least one flame retardant component is provided on the protective bracket, and the flame retardant component includes a flame retardant capsule.

[0009] According to the battery cover of the embodiment of the first aspect of the present invention, a protective cavity is formed by providing a protective bracket, which can effectively protect the connection between the pole and the tab, ensuring the stability and reliability of the electrical connection. By providing a flame retardant, the fire source and the surrounding area can be flame-retarded when the battery cell overheats or an open flame occurs. In particular, the connection between the tab and the pole is not only structurally complex, but also has a relatively high risk of short circuit. The flame retardant provided on the protective bracket can protect the high-incidence area of high temperature or open flame, greatly improving the safety performance of the battery cell and the entire battery system.

[0010] According to some embodiments of the battery cover of the present invention, the protective cavity is extended along the length direction of the cover body, and one end of the pole hole is arranged toward the protective cavity; a accommodating cavity is provided on the protective bracket, at least one flame retardant component is installed in the accommodating cavity, and the accommodating cavity is provided with at least one through opening on the surface of the protective bracket for the release of the flame retardant capsule.

[0011] According to some embodiments of the battery cover of the present invention, the accommodating cavity includes a first accommodating cavity, the first accommodating cavity and the protective cavity are arranged along the width direction of the cover body, and the flame retardant component includes a first flame retardant component arranged in the first accommodating cavity; at least one of the two sides in the width direction of the protective cavity is provided with the first accommodating cavity.

[0012] According to some embodiments of the battery cover of the present invention, the first accommodating cavity is extended along the length direction of the cover body, the width of the first accommodating cavity is smaller than the width of the protective cavity, and the first flame retardant part is a long strip extending along the length direction of the cover body.

[0013] In some embodiments, the opening includes: a first opening provided on the side of the first accommodating cavity away from the cover body, the area of the first opening being larger than the projection area of the first flame retardant component on the surface where the first opening is located; at least one first buckle for limiting the first flame retardant component is provided on the inner wall of the first opening; the opening also includes: a second opening provided on the side of the first accommodating cavity facing the cover body, the second opening being at least two spaced apart along the length direction of the cover body.

[0014] According to some embodiments of the battery cover of the present invention, the accommodating cavity includes a second accommodating cavity, the second accommodating cavity and the protective cavity are arranged along the length direction of the cover body, and the flame retardant component includes a second flame retardant component arranged in the second accommodating cavity; at least one of the two ends in the length direction of the protective cavity is provided with the second accommodating cavity.

[0015] According to some embodiments of the battery cover of the present invention, the through opening includes: a third through opening provided on the side of the second accommodating cavity, the area of the third through opening being larger than the projection area of the second flame retardant component on the surface where the third through opening is located; and at least one second clip for limiting the second flame retardant component is provided on the inner wall of the third through opening.

[0016] According to the second embodiment of the present invention, the battery cell includes: a shell having an opening at at least one end; a battery cell arranged in the shell; and a cover plate, at least one of which is installed one-to-one at the opening, and at least one of the cover plates is the battery cover plate described in the first embodiment of the present application.

[0017] According to the battery cell of the embodiment of the present invention, the battery cover is provided, so that the safety of the battery cell can be improved.

[0018] The power storage device according to the embodiment of the third aspect of the present invention includes: the battery cell described in the embodiment of the second aspect of the present application.

[0019] According to the fourth embodiment of the present invention, the electric device includes: the electric storage device described in the third embodiment of the present application.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 This is an exploded view of a battery cover according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic structural diagram of a battery cover according to an embodiment of the present utility model;

[0024] Figure 3 This is a schematic structural diagram of a protective bracket according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the positions of the protection cavity and the first accommodating cavity according to an embodiment of the utility model;

[0026] Figure 5 This is a schematic structural diagram of the first flame retardant component of an embodiment of the present utility model;

[0027] Figure 6 This is a schematic diagram of the positions of the protection cavity and the second accommodation cavity according to an embodiment of the utility model;

[0028] Figure 7 This is a schematic structural diagram of the second flame retardant component in an embodiment of the present utility model.

[0029] Reference numerals:

[0030] Battery cover 100,

[0031] Cover body 10, pole hole 11,

[0032] Protective bracket 20, protective cavity 21,

[0033] Accommodating cavity 30, through-port 31, first through-port 311, second through-port 312, third through-port 313, first accommodating cavity 32, first buckle 321, second accommodating cavity 33, second buckle 331,

[0034] Flame retardant component 40 , first flame retardant component 41 , and second flame retardant component 42 . DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] Reference below Figure 1 - Figure 7 A battery cover 100 according to an embodiment of the present invention is described.

[0039] like Figure 1-Figure 2 As shown, the battery cover 100 according to some embodiments of the first aspect of the present utility model is used to cover the battery cell on one end of the shell.

[0040] like Figure 1 As shown, the battery cover 100 according to the first embodiment of the present invention includes: a cover body 10 and a protective bracket 20.

[0041] Optionally, the cover body 10 and the protection bracket 20 are detachably connected.

[0042] The cover body 10 is provided with a pole hole 11. The pole hole 11 is set through the cover body 10. Figure 1-Figure 2 In the illustrated embodiment, the cover body 10 is provided with two pole holes 11, which are spaced apart along the length of the battery cover 100. The pole holes 11 are used to mount poles. A battery cell using this battery cover 100 has two poles at one end. Of course, another embodiment of the present application is also possible, in which the cover body 10 is provided with a pole hole 11, in which one pole is mounted. A battery cell using this battery cover 100 has one pole at each end. Therefore, both end covers of the battery cell can adopt the structure of the battery cover 100 of this embodiment of the present application.

[0043] like Figure 3 As shown, the protection bracket 20 is installed on the side of the cover body 10 facing the battery cell. The protection bracket 20 is provided with a protection cavity 21 to protect the connection between the electrode tab and the electrode column of the battery cell.

[0044] In some solutions, the electrode posts and tabs are directly connected, for example, by welding, and the weld between the tabs and the electrode posts is located within the protective cavity 21. Therefore, by providing a protective bracket 20, the protective cavity 21 within it can be used to effectively protect the weld point. In some solutions, a current collector is provided within the protective bracket 20, which is installed within the protective cavity 21. The electrode posts are welded to the current collector, and the tabs are welded to the current collector. Thus, the protective bracket 20 serves to protect the connection point between the electrode posts and the tabs in the battery cover 100.

[0045] It is understandable that after the cover body 10 is encapsulated with the battery housing, the battery cells in the enclosed space may generate a large amount of heat and cause thermal runaway. Thermal runaway is one of the major threats to battery safety and can even cause extreme events such as open fire and explosion in severe cases.

[0046] In order to solve the above problems, the battery cover 100 of the present invention further includes at least one flame retardant component 40 , which is disposed on the protective bracket 20 .

[0047] The flame retardant 40 acts as a flame retardant in a confined space, preventing combustion and explosion, thereby protecting the battery cells and improving the safety of the battery pack. The flame retardant 40 can release a flame retardant when heated. The connection between the tab and the pole is particularly complex and has a relatively high risk of short circuits. The flame retardant 40 is installed on the protective bracket 20. When high temperatures or open flames are generated at the connection between the tab and the pole, the flame retardant 40 can immediately exert its flame retardant effect due to its close proximity to this area. This protects the high-risk areas of high temperatures or open flames within the battery cells, making the protection more effective.

[0048] By installing this flame retardant 40, the presence of the flame retardant 40 does not affect the performance of the battery cells at normal operating temperatures, ensuring stable operation of the battery. However, if the temperature inside the battery cells rises sharply due to any reason (such as a short circuit or external heat source) and reaches a dangerous threshold, the flame retardant 40 can respond quickly by releasing a flame retardant to slow or even interrupt the combustion process. This flame retardant not only works extremely quickly but also forms a protective layer around the fire source, suppressing the spread of the fire.

[0049] Specifically, the flame-retardant element 40 comprises a flame-retardant capsule, which consists of a capsule wall membrane and a core material completely encapsulated by the membrane. The core material contains a flame retardant. When thermal runaway occurs, such as in the presence of high temperatures or open flames, the capsule wall membrane deforms or ruptures, releasing the flame retardant to absorb the heat or extinguish the flame, preventing the battery cell from burning or exploding.

[0050] Optionally, the capsule wall coating may be a polymer layer formed by a melamine resin layer, magnesium hydroxide, and polyethylene (PE) material. Optionally, the capsule core material may be red phosphorus or other materials.

[0051] In some embodiments, the flame retardant capsules may be phase change microcapsules.

[0052] It should be noted that phase change microcapsules are a mature and well-known material in the existing technology. They are a phase change microcapsule prepared with an organic or inorganic material as the core material and an organic matter as the shell material. For example, nano-graphite modified paraffin phase change microcapsules are prepared with paraffin as the core material and polysulfone as the shell material using the existing well-known and mature solvent volatilization method.

[0053] When the temperature of the battery cell is higher than the phase change temperature of the phase change microcapsules, the composite electrode group protective cover with phase change microcapsules can store the heat generated by the battery cell, thereby reducing the internal temperature of the battery cell and preventing the battery from thermal runaway.

[0054] When the temperature of the battery cell is lower than the phase change temperature of the phase change microcapsules, the composite electrode group protective cover with phase change microcapsules can release heat into the battery cell, preventing the battery electrode group from generating lithium dendrites when used at a lower temperature, thereby avoiding safety hazards.

[0055] According to the battery cover 100 of the first embodiment of the present utility model, Figure 3-Figure 4 As shown, the protective bracket 20 forms a protective cavity 21, which effectively protects the connection between the pole and the tab, ensuring the stability and reliability of the electrical connection. The flame retardant 40 can be provided to provide flame retardant treatment to the fire source and surrounding areas in the event of overheating or open flames in the battery cell, thereby significantly improving the safety performance of the battery cell and the entire battery system.

[0056] According to some embodiments of the present invention, the battery cover 100 is combined with Figure 2-Figure 3 The protection cavity 21 extends along the length direction of the cover body 10 , and one end of the pole hole 11 is arranged toward the protection cavity 21 .

[0057] In the above technical solution, the protection cavity 21 is extended along the length direction of the cover body 10. This layout can optimize space utilization.

[0058] One end of the pole hole 11 faces the protection cavity 21 . This configuration allows the connection between the pole and the tab to be directly protected by the protection cavity 21 .

[0059] It is worth noting that the length of the protection cavity 21 can overlap with the length of multiple terminal holes 11. This overlap means that the protection cavity 21 can simultaneously provide protection for the connections between multiple terminals and tabs, further enhancing the ability of the battery cover 100 to protect the key connection parts of the battery.

[0060] like Figure 3 As shown, the protection bracket 20 is provided with a receiving cavity 30, at least one flame retardant 40 is installed in the receiving cavity 30, and the receiving cavity 30 is provided with at least one through hole 31 on the surface of the protection bracket 20 for the release of the flame retardant.

[0061] The provision of a housing cavity 30, with its through-holes, ensures the precise positioning of the flame retardant 40 within the battery cover 100 while providing a channel for the release of the flame retardant. Furthermore, the provision of the housing cavity 30 prevents the flame retardant 40 from being in a stable position, preventing interference with the interior of the battery cell during routine operation. This also facilitates the effective deployment of the flame retardant 40. Since the flame retardant 40 is positioned in a predetermined position, it can release the flame retardant through the through-hole 31 should an abnormal condition such as overheating or open flame occur within the battery.

[0062] It should be noted that the “through opening 31 ” mentioned in the present application should be understood in a broad sense, that is, it is not limited to a shape. The through opening 31 can be “long strip”, “circular”, “triangular”, or “polygonal” and so on.

[0063] like Figure 4 As shown, according to some embodiments of the battery cover 100 of the present invention, the accommodating cavity 30 includes a first accommodating cavity 32, the first accommodating cavity 32 and the protective cavity 21 are arranged along the width direction of the cover body 10, and the flame retardant part 40 includes a first flame retardant part 41 arranged in the first accommodating cavity 32.

[0064] In the above technical solution, combined with Figure 5The first flame retardant 41 is installed in the first accommodating cavity 32 and extends along the length of the battery cover 100. This feature increases the installation length of the first flame retardant 41. The longer first flame retardant 41 can more effectively cover the potentially dangerous areas inside the battery. If an abnormality occurs inside the battery, such as a sharp temperature increase or the emergence of a fire source, the first flame retardant 41 can respond quickly and comprehensively. Through its built-in flame retardant, it effectively suppresses the spread of fire and provides longer-term battery safety.

[0065] A first accommodating cavity 32 is provided on at least one of the two sides in the width direction of the protection cavity 21 .

[0066] In some embodiments, a first accommodating cavity 32 is provided on one side in the width direction of the protection cavity 21 , and the first accommodating cavity 32 is provided with a first flame retardant component 41 .

[0067] First, such an arrangement can improve the space utilization of the first flame retardant component 41 .

[0068] Secondly, the first flame retardant component 41 is closely attached to the protective cavity 21 , so that it can respond immediately when the battery cell is overheated or has an open flame.

[0069] Optionally, the first accommodating cavity 32 is arranged parallel to the protective cavity 21, so that the first flame retardant 41 is parallel to the protective cavity 21. Then the first flame retardant 41 can more directly and evenly cover the protective cavity 21 and the nearby battery cell surface, effectively reducing the speed of heat spread.

[0070] In order to achieve more comprehensive and efficient protection, in some embodiments, such as Figure 4 As shown, the protective cavity 21 is provided with first accommodating cavities 32 on either side along the width direction, and each first accommodating cavity 32 is provided with a first flame retardant member 41. The two first flame retardants 41 can simultaneously protect the protective cavity 21 and the battery cells inside from two directions, reducing the risk of fire spread and further improving the safety performance of the battery cells.

[0071] According to some embodiments of the battery cover 100 of the present invention, the first accommodating cavity 32 is extended along the length direction of the cover body 10, the width of the first accommodating cavity 32 is smaller than the width of the protective cavity 21, and the first flame retardant part 41 is a long strip extending along the length direction of the cover body 10.

[0072] In the above technical solution, the width of the first accommodating cavity 32 is set to be smaller than the width of the protective cavity 21. This design not only ensures that the first flame retardant component 41 can be close to the protective cavity 21 and play an effective role, but also avoids unnecessary waste of space, making the battery cover 100 as a whole lighter and more efficient.

[0073] In addition, combined Figure 4The first flame retardant component 41 is constructed as a long strip extending along the length direction of the cover body 10. This shape not only fits the first accommodating cavity 32, but also enables the first flame retardant component 41 to be more evenly distributed around the battery cell, so that the battery cell can be protected in a timely and effective manner.

[0074] It is worth noting that the "long strip" referred to here can not only be a single, continuous integrated design, but also can be divided into multiple sections according to actual needs.

[0075] The advantage of the integrated long strip flame retardant 40 is the structural integrity and continuity, which can ensure a uniform and stable flame retardant effect throughout the entire length.

[0076] The multi-segmented, elongated flame retardant 40 allows for flexible adjustment based on the cell layout and protection priorities. Each segment can be independently installed and replaced, facilitating targeted protection tailored to specific circumstances. Furthermore, the multi-segment design reduces material waste and lowers production costs.

[0077] In some embodiments, as Figure 4 As shown, the opening 31 includes a first opening 311 located on a side of the first accommodating cavity 32 away from the cover body 10. The area of the first opening 311 is larger than the projected area of the first flame retardant 41 on the surface where the first opening 311 is located. This design facilitates the positioning and fixing of the first flame retardant 41.

[0078] like Figure 4 As shown, at least one first buckle 321 for limiting the first flame retardant component 41 is provided on the inner wall of the first opening 311 .

[0079] The provision of the first latch 321 can better restrain the first flame retardant 41, preventing it from shifting due to vibration or impact during operation, thereby ensuring that the first flame retardant 41 can always remain in the predetermined position and effectively perform its flame retardant function. The first latch 321 not only improves the stability of the installation of the flame retardant 40, but also simplifies the structure of the battery cover 100 and reduces the difficulty of installation.

[0080] Optionally, the first clips 321 are elastically deformable. When the first flame retardant 41 is to be placed, the elastically deformable first clips 321 can be gently moved to slightly deform them. This deformation provides the necessary space for the first flame retardant 41 to enter the first accommodating cavity 32, improving installation smoothness. Once the first flame retardant 41 is fully in place, the user simply releases the force exerted on the first clips 321. The first clips 321 will then quickly return to their original position using their own elastic restoring force, thereby locking the first flame retardant 41 and preventing it from falling out.

[0081] Combine Figure 4 Six first clips 321 are provided on each first accommodating cavity 32. These six first clips 321 are divided into three groups, each group consisting of two corresponding first clips 321. These three groups of first clips 321 are spaced apart along the length of the first accommodating cavity 32. This arrangement creates a stable fixing system for the first accommodating cavity 32, ensuring the secure installation of the first flame retardant component 41 within the first accommodating cavity 32.

[0082] like Figure 4 As shown, the through opening 31 further includes: a second through opening 312 provided on a side of the first accommodating cavity 32 facing the cover body 10 , and there are at least two second through openings 312 spaced apart along the length direction of the cover body 10 .

[0083] The provision of the second opening 312 creates more communication paths between the first accommodating cavity 32 and the interior of the battery, thereby increasing the options for the first flame retardant member 41 to release the flame retardant. In the event of an abnormality inside the battery, the first flame retardant member 41 can release the flame retardant not only through the first opening 311 below it, but also through the second opening 312 above it. This allows multiple openings 31 to release the flame retardant, thereby providing multi-layered flame retardant protection for the battery interior.

[0084] The layout of the second openings 312 allows them to more directly face potential sources of thermal runaway within the battery, enhancing the flame-retardant effect of the flame-retardant element 40. Through their spaced-apart design, the second openings 312 also form multiple fire barriers within the battery, effectively preventing the spread of fire and improving the overall safety of the battery.

[0085] According to some embodiments of the present invention, the battery cover 100, such as Figure 4 As shown, the accommodating cavity 30 includes a second accommodating cavity 33. The second accommodating cavity 33 and the protective cavity 21 are arranged along the length of the cover body 10. The flame retardant 40 includes a second flame retardant 42 disposed in the second accommodating cavity 33. The second accommodating cavity 33 is disposed at at least one of the two ends of the protective cavity 21 in the length direction.

[0086] The layout of the second accommodating cavity 33 makes the flame retardant protection system inside the battery cell more complete. Specifically, when the second accommodating cavity 33 is set at one end of the protective cavity 21, it can form protection from the end of the protective cavity 21. This layout enables effective flame retardant protection to be obtained inside the battery cell, whether in the central area or the edge area of the battery cell. Once an abnormal situation occurs inside the battery, such as a temperature increase or a fire source caused by a short circuit, overcharge or over-discharge, the second flame retardant part 42 releases the flame retardant from the end of the protective cavity 21. In this way, the flame retardant can not only act on the fire source or high-temperature area, but also form an effect similar to an isolation belt between the battery cells, because it can prevent problems with a single battery cell from triggering a chain reaction, leading to failure or even explosion of the entire battery pack. By limiting the spread of fire sources and heat, the firewall provides additional safety redundancy for the battery system, improving the stability and reliability of the entire system.

[0087] Combine Figure 3-Figure 4 A second accommodating cavity 33 is provided at both ends of the protective cavity 21 in the longitudinal direction.

[0088] When the second accommodating chamber 33 is provided at both ends of the protection chamber 21 , it becomes a double protection barrier for the protection chamber 21 in the length direction, making the flame retardant protection system more balanced and comprehensive in the battery cell.

[0089] In some optional embodiments, the accommodating cavity 30 includes: a first accommodating cavity 32 and a second accommodating cavity 33. Figure 4 The second accommodating cavity 33 serves as an extension and complement to the first accommodating cavity 32. This arrangement allows the first and second flame retardants 41, 42 to work together to address potential abnormalities within the battery. If the internal temperature of the battery rises abnormally or a fire source appears, the first and second flame retardants 41, 42 respond simultaneously, releasing flame retardants from different locations, forming a denser flame-retardant barrier. This more effectively suppresses the spread of fire and protects the battery and surrounding equipment.

[0090] According to some embodiments of the present invention, the battery cover 100, such as Figure 6 As shown, the opening 31 includes: a third opening 313 provided on the side surface of the second accommodating cavity 33 , and the area of the third opening 313 is larger than the projection area of the second flame retardant 42 on the surface where the third opening 313 is located.

[0091] This means that during the assembly process, the second flame retardant 42 can be easily and smoothly placed into the second accommodating cavity 33 through the third opening 313 without worrying about installation difficulties or damage caused by size mismatch.

[0092] The inner wall of the third opening 313 is provided with at least one second latch 331 for retaining the second flame retardant 42. This second latch 331 prevents the second flame retardant 42 from accidentally dislodging due to vibration, impact, or other external forces during battery operation. The tight fit between the second latch 331 and the second flame retardant 42 ensures that the flame retardant 40 is securely fixed within the second accommodating cavity 33, maintaining its position even under extreme operating conditions, thereby ensuring the continued flame retardancy.

[0093] The second clip 331 is also designed to ensure proper flame retardant release. Its placement ensures it won't interfere with the proper release of the flame retardant. If an abnormality occurs within the battery, requiring flame retardant intervention, the second flame retardant element 42 responds quickly, releasing the flame retardant through a pre-set channel while the second clip 331 maintains its fixed position, preventing it from interfering with the flow and diffusion of the flame retardant.

[0094] In some optional embodiments, the second clips 331 are elastically deformable. When the second flame retardant 42 is to be placed, these elastically deformable second clips 331 can be gently moved to slightly deform them. This deformation provides the necessary space for the second flame retardant 42 to enter the second accommodating cavity 33, improving installation smoothness. Once the second flame retardant 42 is fully in place, the user simply releases the force exerted on the second clips 331. The second clips 331 will then quickly return to their original position using their own elastic restoring force, thereby locking the second flame retardant 42 and preventing it from falling out.

[0095] Combine Figure 6 There are four second clips 331, each located on a different inner wall of the third opening 313. This arrangement creates a multi-directional fixing point, ensuring that the second flame retardant 42 is effectively supported and restrained by at least one second clip 331 when subjected to external forces at various angles or directions, thereby significantly reducing the risk of the second flame retardant 42 falling out.

[0096] In addition, combined Figure 7 The second flame retardant component 42 is constructed as a square that is adapted to the second accommodating cavity 33. This shape fits the second accommodating cavity 33 and improves the reliability of the second flame retardant component 42.

[0097] A battery cell according to an embodiment of the second aspect of the present invention includes: a housing, a battery cell, and a cover plate.

[0098] The housing has an opening at at least one end. The battery cells are disposed within the housing. At least one cover plate is provided, and each cover plate is mounted in a one-to-one correspondence with the opening. The at least one cover plate is the battery cover plate 100 of the first embodiment of the present application.

[0099] In the above embodiment, the flame retardant 40 and the opening 31 built into the battery cover 100 can prevent the spread of fire sources or high-temperature areas inside the battery, thereby protecting adjacent battery cells or other sensitive components from damage and improving the safety of battery use.

[0100] The power storage device according to the third embodiment of the present invention includes: the battery cell according to the second embodiment of the present application.

[0101] By adopting the battery cell of the second embodiment, the safety performance and reliability of the power storage device are improved.

[0102] According to the fourth embodiment of the present utility model, the electric device includes: the power storage device of the third embodiment of the present application.

[0103] By integrating the power storage device of the third embodiment as an energy supply unit, the safety performance of the power-consuming device is improved.

[0104] Reference below Figure 1 - Figure 7 The battery cover 100 according to the embodiment of the present invention is described in detail with reference to a specific embodiment. It is worth noting that the following description is merely an illustrative illustration and does not specifically limit the present invention.

[0105] The battery cover 100 includes a cover body 10 , a protective bracket 20 , a first flame retardant component 41 and a second flame retardant component 42 .

[0106] Reference Figure 1-Figure 2 Two pole holes 11 are provided on the cover body 10 .

[0107] The protection bracket 20 is mounted on a side of the cover body 10 facing the battery cell, and a protection cavity 21 is defined in the protection bracket 20 .

[0108] Reference Figure 2 The protection cavity 21 extends along the length direction of the cover body 10 , and the two pole holes 11 are arranged at intervals along the length direction of the cover body 10 , with one end of each pole hole 11 facing the protection cavity 21 .

[0109] Reference Figure 3-Figure 4 The protection bracket 20 is provided with two first accommodating cavities 32 and four second accommodating cavities 33 .

[0110] The two first accommodating cavities 32 are respectively disposed on both sides of the protection cavity 21 along the width direction of the cover body 10. Each first accommodating cavity 32 is extended along the length direction of the cover body 10.

[0111] The width of the first accommodating cavity 32 is smaller than the width of the protection cavity 21 .

[0112] The first flame retardant 41 is disposed in the first accommodating cavity 32. Figure 5 The first flame retardant component 41 is in the shape of a long strip extending along the length direction of the cover body 10 .

[0113] The first accommodating cavity 32 includes a first opening 311 , a second opening 312 and a first buckle 321 .

[0114] The first opening 311 is provided on a side of the first accommodating cavity 32 away from the cover body 10. The area of the first opening 311 is larger than the projection area of the first flame retardant 41 on the surface where the first opening 311 is located.

[0115] The first buckle 321 is disposed on the inner wall of the first opening 311 and is used to restrict the first flame retardant component 41 .

[0116] The second openings 312 are provided on a side of the first accommodating cavity 32 facing the cover body 10 . There are three second openings 312 spaced apart along the length of the cover body 10 .

[0117] Reference Figure 6 The second accommodating cavity 33 and the protection cavity 21 are arranged along the length direction of the cover body 10. Two second accommodating cavities 33 are respectively provided at both ends of the protection cavity 21.

[0118] A second flame retardant component 42 is disposed in each second accommodating cavity 33 .

[0119] Second accommodating cavities 33 are provided at both ends of the protection cavity 21 in the longitudinal direction.

[0120] The second accommodating cavity 33 includes a third opening 313 on the side and a second buckle 331 on the inner wall of the third opening 313. The area of the third opening 313 is larger than the projection area of the second flame retardant 42 on the surface where the third opening 313 is located.

[0121] There are four second buckles 331 , which are respectively provided on different inner walls of the third opening 313 for restraining the second flame retardant 42 .

[0122] Reference Figure 7 , the second flame retardant 42 is square.

[0123] Other components of the battery cover 100 according to the embodiment of the present invention, such as the battery cell, the power storage device, the power consumption device, etc., as well as the operation are well known to those skilled in the art and will not be described in detail here.

[0124] Throughout this specification, references to terms such as "embodiment" and "example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0125] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cover, characterized in that: include: A cover plate body, wherein the cover plate body is provided with a pole hole; A protective bracket is mounted on the side of the cover body facing the battery cell, and a protective cavity is provided on the protective bracket to protect the connection between the tab and the pole of the battery cell; At least one flame retardant component is provided on the protection bracket, and the flame retardant component includes a flame retardant capsule.

2. The battery cover according to claim 1, characterized in that: The protection cavity is extended along the length direction of the cover body, and one end of the pole hole is arranged toward the protection cavity; The protection bracket is provided with a receiving cavity, and at least one flame retardant component is installed in the receiving cavity. The receiving cavity is provided with at least one through opening on the surface of the protection bracket for releasing the flame retardant capsule.

3. The battery cover according to claim 2, characterized in that: The accommodating cavity includes a first accommodating cavity, the first accommodating cavity and the protective cavity are arranged along the width direction of the cover body, and the flame retardant component includes a first flame retardant component provided in the first accommodating cavity; The first accommodating cavity is provided on at least one of the two sides in the width direction of the protection cavity.

4. The battery cover according to claim 3, characterized in that: The first accommodating cavity is extended along the length direction of the cover body, the width of the first accommodating cavity is smaller than the width of the protection cavity, and the first flame retardant is in the shape of an elongated strip extending along the length direction of the cover body.

5. The battery cover according to claim 3, characterized in that: The through opening includes: a first through opening provided on a side of the first accommodating cavity away from the cover body, wherein the area of the first through opening is larger than the projected area of the first flame retardant component on the surface where the first through opening is located; At least one first buckle for restraining the first flame retardant component is provided on the inner wall of the first opening; The through opening further includes: a second through opening provided on a side of the first accommodating cavity facing the cover body, and the number of the second through openings is at least two and spaced apart along the length direction of the cover body.

6. The battery cover according to claim 2, characterized in that: The accommodating cavity includes a second accommodating cavity, the second accommodating cavity and the protection cavity are arranged along the length direction of the cover body, and the flame retardant component includes a second flame retardant component provided in the second accommodating cavity; At least one of the two ends of the protection cavity in the longitudinal direction is provided with the second accommodating cavity.

7. The battery cover according to claim 6, characterized in that: The through opening includes: a third through opening provided on a side surface of the second accommodating cavity, wherein the area of the third through opening is larger than the projection area of the second flame retardant on the surface where the third through opening is located; At least one second buckle for limiting the second flame retardant component is provided on the inner wall of the third opening.

8. A battery cell, characterized in that: include: a housing having an opening at at least one end; A battery cell is disposed in the housing; There is at least one cover plate, and the cover plates are installed at the openings in a one-to-one correspondence. At least one cover plate is a battery cover plate according to any one of claims 1 to 7.

9. An electric storage device, characterized in that: include: The battery cell according to claim 8.

10. An electrical device, characterized in that: include: The power storage device according to claim 9.

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