Battery cover body assembly and battery

Abstract

The utility model relates to a battery cover body assembly and a battery. The battery cover body assembly comprises a first metal plate, an insulating part, a second metal plate and a pressure relief film, a first through hole is formed in the first metal plate; the first metal plate is electrically connected with one electrode of the battery. The insulating part is stacked on the first metal plate. The second metal plate is stacked on the side, away from the first metal plate, of the insulating part, and the second metal plate is electrically insulated from the first metal plate through the insulating part; a second through hole is formed in the second metal plate, the first through hole is communicated with the second through hole, and part of the structure of the first metal plate is exposed out of the second through hole; and the second metal plate is electrically connected with the other electrode of the battery. The pressure relief film covers one end of the first through hole and is connected with the first metal plate. Advanced pressure relief of the battery is realized by arranging the first through hole and the pressure relief films with different thicknesses, the operation mode is simple and rapid, and the efficiency is relatively high; and in addition, the technological requirement for installation operation is low, material damage is not prone to being caused, and the production yield can be increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery components, in particular to a battery cover assembly and a battery. BACKGROUND

[0002] With the development of battery technology, steel shell battery technology has emerged. The steel shell battery is usually provided with a battery cell for providing electric energy. The battery cell is protected by a sealed shell formed by the cooperation of a shell and a cover. The electrodes of the battery cell are led out to the outside of the sealed shell for convenient use. Since the cover and the shell form a sealed structure, the internal pressure of the sealed shell may increase due to the use temperature, the chemical reaction inside the battery cell, etc. during the use of the battery. When the internal pressure exceeds the bearable pressure of the sealed shell, an explosion may occur, causing personal injury or economic loss.

[0003] In the related art, the internal pressure of the sealed shell is usually relieved in advance by providing a pressure relief groove on the shell or the cover. The specific way is as follows: a pressure relief groove is formed on the shell or the cover at a suitable position by laser engraving. The thickness of the shell side wall at the pressure relief groove is smaller than that of the shell side wall at other positions. The specific thickness is set according to the pressure relief requirement, so that the bearable pressure at the pressure relief groove is smaller than that at other positions of the shell. When the internal pressure of the shell reaches a certain value, the pressure relief groove will be damaged first to form a pressure relief port, thereby achieving pressure relief and avoiding uncontrollable explosion caused by excessive internal pressure of the shell.

[0004] However, the above-mentioned way of setting a pressure relief groove by laser has a high equipment price and a complicated production process, and the efficiency is low. In addition, this way has high operation requirements. If the process control is not good, the shell may be penetrated, resulting in the failure of the shell. Utility model content

[0005] Therefore, it is necessary to provide a battery cover assembly and a battery to solve the problems of high manufacturing cost, low efficiency and difficult operation of the structure for pressure relief.

[0006] In one aspect, the present application provides a battery cover assembly, which comprises: a first metal plate provided with a first through hole; the first metal plate is electrically connected to one pole of a battery. An insulating piece is stacked on the first metal plate. A second metal plate is stacked on the side of the insulating piece away from the first metal plate, and the second metal plate is electrically insulated from the first metal plate by the insulating piece; the second metal plate is provided with a second through hole, the first through hole and the second through hole are communicated, and part of the structure of the first metal plate is exposed to the second through hole; the second metal plate is electrically connected to the other pole of the battery. A pressure relief film is connected to the first metal plate and covers the first through hole.

[0007] In some embodiments, the first metal plate is provided with a mounting groove on one side facing or away from the insulating member, the first through hole penetrates the bottom wall of the mounting groove, and the pressure relief film is laid on the bottom wall of the mounting groove to cover the first through hole.

[0008] In some embodiments, the insulating member is a plate structure, the insulating member is provided with a third through hole, the third through hole is arranged corresponding to the first through hole, the first through hole is in communication with the third through hole, and part of the structure of the first metal plate is exposed to the third through hole.

[0009] In some embodiments, the first metal plate comprises a flat plate part and a raised part, the insulating member is stacked on the flat plate part, the raised part is arranged on one side of the flat plate part close to the insulating member, the raised part penetrates the third through hole to be exposed to the second through hole, and the first through hole is arranged in the middle of the raised part and penetrates the raised part and the flat plate part.

[0010] In some embodiments, the material of the pressure relief film is aluminum metal.

[0011] In some embodiments, the material of the first metal plate is rust-proof aluminum, and the material of the second metal plate is stainless steel.

[0012] In another aspect, the application provides a battery comprising the battery cover assembly as described above, further comprising a shell and an electric core, the surface of the shell is provided with an opening, the battery cover assembly is arranged on the opening, and the electric core is arranged inside the shell.

[0013] The positive electrode of the electric core is electrically connected with the first metal plate or the second metal plate, and the negative electrode of the electric core is electrically connected with the second metal plate or the first metal plate.

[0014] In some embodiments, the bottom surfaces of the first metal plate, the insulating member and the second metal plate are of the same shape and coaxially arranged, wherein the outer edge circumference of the first metal plate is denoted as C1, the outer edge circumference of the insulating member is denoted as C2, and the outer edge circumference of the second metal plate is denoted as C3, and the size relationship of the outer circumferences is C1

[0015] In some embodiments, the battery cover assembly further comprises a connecting plate, the connecting plate is arranged along the outer edge of the second metal plate and connected with the outer edge of the second metal plate, and the connecting plate extends along the thickness direction of the second metal plate; when the battery cover assembly is arranged on the opening, the connecting plate is connected with the side wall of the opening.

[0016] In some embodiments, the side wall of the shell is provided with a limiting gap, which is arranged along the edge of the opening and cooperates with the outer edge of the battery cover assembly.

[0017] The battery cover assembly and the battery have the basic structure of the battery cover composed of the first metal plate, the insulating piece and the second metal plate arranged in sequence. The first metal plate and the second metal plate are electrically connected with the positive and negative electrodes of the battery respectively to lead out the electrodes, facilitating the use of the battery. The insulating piece is arranged between the first metal plate and the second metal plate to electrically insulate the first metal plate and the second metal plate, avoiding short circuit and ensuring normal use of the battery. The first through hole and the second through hole are in communication, and the side of the first metal plate away from the insulating piece and the side of the second metal plate away from the insulating piece can be directly communicated through the channel formed by the first through hole and the second through hole in communication. The first through hole serves as a pressure relief hole, and the pressure relief film covers the first through hole to close the first through hole. The thickness of the pressure relief film is smaller than the thickness of the first metal plate. When the internal pressure of the battery is too large, the pressure relief film will be damaged first, and the pressure relief is realized through the channel formed by the first through hole and the through part in communication. The present application realizes the early pressure relief of the battery by arranging the first through hole and the pressure relief film with different thicknesses, which is simple and efficient in operation mode, has low process requirement for installation operation, is not easy to cause material damage, and can improve the production yield. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure exploded view of the battery of one embodiment of the battery cover assembly and the battery of the present application.

[0019] Figure 2 The structure schematic view of the first metal plate of one embodiment of the battery cover assembly and the battery of the present application.

[0020] Figure 3 The structure schematic view of the second metal plate of one embodiment of the battery cover assembly and the battery of the present application.

[0021] Figure 4 The cross-sectional view of the battery along the plane where the central axis of the battery is located of one embodiment of the battery cover assembly and the battery of the present application.

[0022] Figure 5 The cross-sectional view of the battery along the plane where the central axis of the battery is located of another embodiment of the battery cover assembly and the battery of the present application.

[0023] Figure 6 The cross-sectional view of the battery along the plane where the central axis of the battery is located of another embodiment of the battery cover assembly and the battery of the present application.

[0024] Figure 7 The cross-sectional view of the battery along the plane where the central axis of the battery is located of another embodiment of the battery cover assembly and the battery of the present application.

[0025] Figure 8 An embodiment of a battery cover assembly and a battery Figure 7 A partial enlarged view at A in the figure.

[0026] In the figure, 100, first metal plate; 110, first through hole; 120, mounting groove; 130, flat plate part; 140, protruding part; 200, insulating piece; 210, third through hole; 300, second metal plate; 310, second through hole; 400, pressure relief film; 500, shell; 510, limiting gap; 600, battery cell; 700, connecting plate. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, are intended to indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely used for convenience of description of the present application and simplification of the description, and therefore should not be construed as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0028] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely used for convenience of description of the present application and simplification of the description, and therefore should not be construed as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0029] In addition, if these terms "first", "second" appear, these terms are only used for description purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0030] In the present application, unless specifically defined otherwise and limited, if there are terms such as "mount", "connect", "connect", "fix" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless specifically defined otherwise and limited, if there are terms such as "mount", "connect", "connect", "fix" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] It should be noted that if an element is referred to as "fixed to" or "disposed to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0033] Referring to Figure 1 , Figure 1 The disassembly structure diagram of the battery in an embodiment of the present application is shown, and the battery cover assembly provided by the embodiment of the present application includes a first metal plate 100, an insulating piece 200, a second metal plate 300 and a pressure relief film 400. The first metal plate 100 is provided with a first through hole 110; the first metal plate 100 is electrically connected to one of the poles of the battery. The insulating piece 200 is stacked on the first metal plate 100. The second metal plate 300 is stacked on the side of the insulating piece 200 away from the first metal plate 100, and the second metal plate 300 is electrically insulated from the first metal plate 100 through the insulating piece 200; the second metal plate 300 is provided with a second through hole 310, the first through hole 110 and the second through hole 310 are communicated, and part of the structure of the first metal plate 100 is exposed to the second through hole 310; the second metal plate 300 is electrically connected to the other pole of the battery. The pressure relief film 400 is connected with the first metal plate 100 and covers the first through hole 110.

[0034] Referring to Figure 1 and Figure 2 It should be noted that the insulating member 200 is clamped between the first metal plate 100 and the second metal plate 300, and the first metal plate 100, the insulating member 200 and the second metal plate 300 form an integral structure. The first through hole 110 serves as a pressure relief hole, and the side of the first metal plate 100 away from the insulating member 200 is in direct communication with the side of the second metal plate 300 away from the insulating member 200 through the first through hole 110 and the second through hole 310; when the edge of the battery cover assembly is sealed, pressure relief can be performed through the first through hole 110 on the surface of the first metal plate 100 and the second through hole 310 on the surface of the second metal plate 300. The pressure relief film 400 is arranged at one end of the first through hole 110 to ensure the sealing of the battery cover assembly during use of the battery.

[0035] In addition, the first metal plate 100 is electrically connected to one pole of the battery, and the second metal plate 300 is electrically connected to the other pole of the battery, so that the positive and negative poles of the battery can be led out by the battery cover assembly for use. The insulating member 200 is selected from insulating materials such as electrolyte-resistant hot melt adhesive, modified acrylic ester adhesive, modified epoxy resin adhesive, and modified polyurethane adhesive, and the first metal plate 100 and the second metal plate 300 on both sides are connected by hot melting, and the first metal plate 100 and the second metal plate 300 are not in direct contact to prevent short circuit and ensure safety in use. Part of the structure of the first metal plate 100 is exposed to the second through hole 310, so that from the side of the second metal plate 300 away from the first metal plate 100, a conductive structure such as a wire or a conductive sheet can be used to pass through the second through hole 310 and connect with the first metal plate 100, and another conductive structure is connected to the side of the second metal plate 300 away from the first metal plate 100, ensuring that the positive and negative poles of the battery can be led out from the side of the second metal plate 300 away from the first metal plate 100. Similarly, the conductive structure connected to the second metal plate 300 can pass through the channel formed by the second through hole 310 and the first through hole 110, or be arranged along the outer edge of the battery cover assembly, thereby extending to the side of the first metal plate 100 away from the second metal plate 300, and another conductive mechanism is connected to the side of the first metal plate 100 away from the second metal plate 300, so that the positive and negative poles of the battery can be led out from the side of the first metal plate 100 away from the second metal plate 300. Thus, whether on the side of the first metal plate 100 of the battery cover assembly or on the side of the second metal plate 300 of the battery cover assembly, the electrodes can be led out by the two metal plates respectively and electrically connected to external electrical appliances to meet the needs of battery use.

[0036] The battery cover assembly is used, the corresponding thickness of the pressure relief film 400 is selected according to the required pressure relief value of the product, and the pressure relief film 400 is broken when the internal pressure reaches a certain value. The pressure relief film 400 has a certain connection strength with the first metal plate 100, which needs to ensure that when the internal pressure increases, the pressure relief film 400 will be broken first, rather than the pressure relief film 400 being separated from the first metal plate 100, so as to fix the corresponding relationship between the pressure relief value and the pressure relief film 400, and facilitate the selection of the pressure relief film 400.

[0037] Through the above setting, the pressure relief film 400 and the first through hole 110 can realize the advance pressure relief, improve the safety of the battery, and only need to be installed to one end of the first through hole 110 for use, which is simple and fast to install and set, and can effectively improve the production efficiency; and the process requirement is lower, and the metal plate is not easy to be damaged during processing, effectively improving the yield.

[0038] Referring to Figure 1 and Figure 2 In some embodiments, the first metal plate 100 is provided with a mounting groove 120 on the side facing or away from the insulating member 200, the first through hole 110 penetrates the bottom wall of the mounting groove 120, and the pressure relief film 400 is laid on the bottom wall of the mounting groove 120 to cover the first through hole 110.

[0039] It should be noted that, preferably, the mounting groove 120 is arranged on the side of the first metal plate 100 close to the insulating member 200, and the shape and size of the mounting groove 120 are matched with the pressure relief film 400. During installation, the pressure relief film 400 is laid in the mounting groove 120 to close the first through hole 110, the side wall of the mounting groove 120 is in contact with the side wall of the pressure relief film 400, which provides limiting for the pressure relief film 400 and increases the contact area between the pressure relief film 400 and the first metal plate 100, so that the installation of the pressure relief film 400 is more stable.

[0040] Referring to Figure 1 In some embodiments, the insulating member 200 is in a plate structure, the insulating member 200 is provided with a third through hole 210, the third through hole 210 is arranged corresponding to the first through hole 110, the first through hole 110 is in communication with the third through hole 210, and part of the structure of the first metal plate 100 is exposed to the third through hole 210.

[0041] It should be noted that the insulating piece 200 is selected to have a plate structure, and the first metal plate 100 and the second metal plate 300 are respectively arranged on two opposite sides of the insulating piece 200. The third through hole 210 is coaxially arranged with the first through hole 110 and the second through hole 310, and the first through hole 110, the second through hole 310 and the third through hole 210 are communicated, so that part of the structure of the first metal plate 100 is exposed to the third through hole 210 and also exposed to the second through hole 310, that is, part of the structure of the first metal plate 100 can be directly contacted from the side of the second metal plate 300 away from the insulating piece 200.

[0042] Referring to Figure 1 and Figure 2 In some embodiments, the first metal plate 100 includes a flat plate part 130 and a protruding part 140, the insulating piece 200 is stacked on the flat plate part 130, the protruding part 140 is arranged on the side of the flat plate part 130 close to the insulating piece 200, the protruding part 140 is arranged through the third through hole 210 to be exposed to the second through hole 310; the first through hole 110 is arranged in the middle of the protruding part 140 and penetrates the protruding part 140 and the flat plate part 130.

[0043] It should be noted that the flat plate part 130 has a plate structure, and the insulating piece 200 is stacked on one side of the flat plate part 130. The aperture of the third through hole 210 is smaller than the aperture of the second through hole 310. When the protruding part 140 is arranged through the second through hole 310, the edge of the protruding part 140 abuts against the inner side wall of the second through hole 310, and the protruding part 140 does not contact the inner side wall of the third through hole 210, so as to ensure electrical insulation. The protruding part 140 is arranged through the second through hole 310, and the installation positioning between the insulating piece 200 and the first metal plate 100 can be realized during installation, and the structure for conducting electricity such as wires, conductive sheets and the like can be conveniently connected. The first through hole 110 is arranged in the middle of the protruding part 140, and the first through hole 110, the second through hole 310 and the third through hole 210 can be ensured to be communicated when the protruding part 140 is arranged through the second through hole 310.

[0044] In some embodiments, the material of the pressure relief film 400 is aluminum metal.

[0045] It should be noted that the pressure relief film 400 is made of aluminum metal material, which is convenient for processing and can be processed to a suitable thickness according to actual pressure relief requirements. In addition, aluminum metal has a certain strength, which can ensure the overall strength of the battery cover assembly.

[0046] In some embodiments, the material of the first metal plate 100 is anti-rust aluminum, and the material of the second metal plate 300 is stainless steel.

[0047] It should be noted that the first metal plate 100 and the second metal plate 300 are made of rust-proof materials, so that the first metal plate 100 and the second metal plate 300 will not fail due to oxidation. On this basis, the first metal plate 100 is electrically connected to the positive electrode of the battery, and the second metal plate 300 is electrically connected to the negative electrode of the battery. The first metal plate 100 is made of rust-proof aluminum, which can withstand high potential and is not easy to corrode, and has high energy density, which is suitable for the positive electrode of the battery. The second metal plate 300 is made of stainless steel material, which can adapt to the current change of the negative electrode, is suitable for the negative electrode of the battery, and provides high structural strength. Through the above setting, the electrical performance of the battery cover assembly is good.

[0048] In another aspect, the application provides a battery comprising the battery cover assembly as described above, further comprising a shell 500 and a battery cell 600. The shell 500 has an opening on its surface, and the battery cover assembly is arranged at the opening. The battery cell 600 is arranged inside the shell 500. The positive electrode of the battery cell 600 is electrically connected to the first metal plate 100 or the second metal plate 300, and the negative electrode of the battery cell 600 is electrically connected to the second metal plate 300 or the first metal plate 100.

[0049] Referring to Figure 1 It should be noted that the battery cell 600 is arranged inside the sealed structure formed by the shell 500 and the battery cover assembly, so as to protect the battery cell 600 from being damaged by external impact. The positive and negative electrodes of the battery cell 600 are respectively electrically connected to the first metal plate 100 and the second metal plate 300, so as to facilitate the electrode to be led out by the first metal plate 100 and the second metal plate 300, and to supply power to external power devices.

[0050] Referring to Figure 4 In some embodiments, the battery cover assembly is installed at the opening of the shell 500 in a manner that the first metal plate 100 is closer to the battery cell 600 (i.e., the first metal plate 100 is located below the second metal plate 300). At this time, the side of the first metal plate 100 away from the insulating member 200 is electrically connected to the battery cell 600, and the side of the first metal plate 100 close to the insulating member 200 (i.e., the part of the structure exposed to the third through hole 210) is connected to the conductive sheet and the conductive wire; the side of the second metal plate 300 close to the insulating member 200 is electrically connected to the battery cell 600, and the side of the second metal plate 300 away from the insulating member 200 is connected to the conductive sheet and the conductive wire, thereby enabling the circuit of the battery to be conducted.

[0051] Referring to Figure 5In some embodiments, the battery cover assembly is installed at the opening of the shell 500 in a manner that the second metal plate 300 is closer to the battery cell 600 (i.e., the first metal plate 100 is above the second metal plate 300). At this time, the side of the second metal plate 300 away from the insulating piece 200 is electrically connected to the battery cell 600, and the outer edge of the side of the second metal plate 300 close to the insulating piece 200 is connected to the conductive sheet and the conductive wire; the side of the first metal plate 100 close to the insulating piece 200 (i.e., the part of the structure exposed to the third through hole 210) is electrically connected to the battery cell 600, and the side of the first metal plate 100 away from the insulating piece 200 is connected to the conductive sheet and the conductive wire, thereby enabling the circuit of the battery to be conducted.

[0052] Referring to Figure 1 In some embodiments, the bottom surfaces of the first metal plate 100, the insulating piece 200, and the second metal plate 300 are of the same shape and coaxially arranged, wherein the outer edge circumference of the first metal plate 100 is denoted as C1, the outer edge circumference of the insulating piece 200 is denoted as C2, and the outer edge circumference of the second metal plate 300 is denoted as C3, and the size relationship of the outer circumferences is C1

[0053] Preferably, the first metal plate 100, the insulating piece 200, and the second metal plate 300 are all circular plate pieces, the first through hole 110 is formed in the middle of the first metal plate 100, the second through hole 310 is formed in the middle of the second metal plate 300, and the third through hole 210 is formed in the middle of the insulating piece 200, so that the first through hole 110, the second through hole 310, and the third through hole 210 correspond to and communicate with each other. The diameters of the first metal plate 100, the insulating piece 200, and the second metal plate 300 increase in turn, i.e., the outer edge of the second metal plate 300 is the outer edge of the battery cover assembly, and when the battery cover assembly is covered at the opening of the shell 500, the outer edge of the second metal plate 300 is connected to the side wall of the opening to form a seal. In addition, due to the smaller diameters of the insulating piece 200 and the first metal plate 100, the edge of the second metal plate 300 can be directly connected to the side of the first metal plate 100 away from the insulating piece 200, ensuring that the side of the first metal plate 100 away from the insulating piece 200 can be simultaneously connected to the first metal plate 100 and the second metal plate 300.

[0054] Referring to Figure 3 Preferably, the battery cover assembly further comprises a connecting plate 700, which is arranged along the outer edge of the second metal plate 300 and connected to the outer edge of the second metal plate 300, and extends along the thickness direction of the second metal plate 300; when the battery cover assembly is covered at the opening, the connecting plate 700 is connected to the side wall of the opening.

[0055] Referring to Figure 6In some embodiments, the connecting plate 700 extends from the outer edge of the second metal plate 300 away from the insulating member 200. Referring to FIG. 6, in other embodiments, the connecting plate 700 extends from the outer edge of the second metal plate 300 towards the insulating member 200. In both embodiments, the side wall of the connecting plate 700 away from the second metal plate 300 is connected to the inner wall of the shell 500 at the opening, which effectively increases the contact area between the battery cover assembly and the shell 500, and makes the connection between the battery cover assembly and the shell 500 more stable.

[0056] Referring to Figure 1 , Figure 7 and Figure 8 In some embodiments, the side wall of the shell 500 is provided with a limiting notch 510, which is arranged along the edge of the opening and cooperates with the outer edge of the battery cover assembly.

[0057] It should be noted that when the battery cover assembly is arranged at the opening, the outer edge of the second metal plate 300 is clamped at the limiting notch 510, which provides positioning during installation of the battery cover assembly, facilitates installation of the battery cover assembly, and after installation of the battery cover assembly is completed, the limiting notch 510 provides limiting to avoid the battery cover assembly from being deviated under external force, thereby improving the installation stability of the battery cover assembly.

[0058] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0059] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A battery cover assembly, comprising: The battery cover assembly comprises: a first metal plate with a first through hole; the first metal plate is electrically connected to one pole of the battery; an insulating piece is stacked on the first metal plate; a second metal plate is stacked on the side of the insulating piece away from the first metal plate, and the second metal plate is electrically insulated from the first metal plate by the insulating piece; the second metal plate has a second through hole, the first through hole and the second through hole are communicated, and part of the structure of the first metal plate is exposed to the second through hole; the second metal plate is electrically connected to the other pole of the battery; a pressure relief film is connected to the first metal plate and covers the first through hole.

2. The battery cover assembly of claim 1, wherein, The side of the first metal plate facing or away from the insulating piece is provided with a mounting groove, the first through hole penetrates the bottom wall of the mounting groove, and the pressure relief film is laid on the bottom wall of the mounting groove to cover the first through hole.

3. The battery cover assembly of claim 1, wherein, The insulating piece is in a plate structure, the insulating piece has a third through hole, the third through hole is arranged corresponding to the first through hole, the first through hole and the third through hole are communicated, and part of the structure of the first metal plate is exposed to the third through hole.

4. The battery cover assembly of claim 3, wherein, The first metal plate comprises a flat plate part and a protruding part, the insulating piece is stacked on the flat plate part, the protruding part is arranged on the side of the flat plate part close to the insulating piece, the protruding part penetrates the third through hole to be exposed to the second through hole; the first through hole is arranged in the middle of the protruding part and penetrates the protruding part and the flat plate part.

5. The battery cover assembly of claim 1, wherein, The material of the pressure relief film is aluminum metal.

6. The battery cover assembly of claim 1, wherein, The material of the first metal plate is rust-proof aluminum, and the material of the second metal plate is stainless steel.

7. A battery, characterized by The battery cover assembly comprises the battery cover assembly according to any one of claims 1-6, a shell and an electric core, an opening is arranged on the surface of the shell, the battery cover assembly is arranged on the opening, and the electric core is arranged in the shell. The positive pole of the electric core is electrically connected to the first metal plate or the second metal plate, and the negative pole of the electric core is electrically connected to the second metal plate or the first metal plate.

8. The battery of claim 7, wherein, The bottom surfaces of the first metal plate, the insulating piece and the second metal plate are coaxially arranged and have the same shape, wherein the outer edge circumference of the first metal plate is denoted as C1, the outer edge circumference of the insulating piece is denoted as C2, and the outer edge circumference of the second metal plate is denoted as C3, and the size relationship of the outer circumferences is C1 9. The battery of claim 8, wherein, The battery cover assembly further comprises a connecting plate, the connecting plate is arranged along the outer edge of the second metal plate and connected to the outer edge of the second metal plate, and the connecting plate extends along the thickness direction of the second metal plate; when the battery cover assembly is arranged on the opening, the connecting plate is connected to the side wall of the opening.

10. The battery of claim 7, wherein, The side wall of the shell is provided with a limiting notch, the limiting notch is arranged along the edge of the opening, and the limiting notch is matched with the outer edge of the battery cover assembly.

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