Cover plate assembly, battery, battery assembly and electric equipment

Abstract

The utility model discloses a cover plate assembly, a battery, a battery assembly and electric equipment. The cover plate assembly comprises a cover plate (100) and a fixing piece (600), the cover plate (100) comprises a liquid injection hole (111) and a first connecting part (112), the fixing piece (600) comprises a second connecting part (200) and a sealing part (300), the second connecting part (200) comprises a body (210) and a connecting piece (220), and the cover plate (100) and the second connecting part (200) are fixedly connected through mechanical connection of the connecting piece (220) and the first connecting part (112). The fixed connection mode of the cover plate (100) and the second connecting part (200) through welding in the prior art is canceled, the production cost of the battery is saved, and the production process is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cover plate assemblies, and more particularly, to a cover plate assembly, a battery, a battery assembly, and an electrical device. BACKGROUND

[0002] In the prior art, the sealing method for the liquid injection hole of a battery is usually to block the liquid injection hole with a fixing member and to connect the fixing member and the liquid injection hole by laser welding. This method has high equipment cost, high requirement for the welding member, high operation difficulty, high risk coefficient, and may cause deformation of the cover plate during welding, which may result in explosion welding or poor welding and damage to the battery cell, thereby affecting the yield. CONTENT OF THE UTILITY MODEL

[0003] To solve at least one problem in the prior art, the present application provides a cover plate assembly, a battery, a battery assembly, and an electrical device.

[0004] The present application provides a cover plate assembly, comprising a cover plate and a fixing member, a liquid injection hole and a first connecting portion, the liquid injection hole penetrating the cover plate along a first direction; the fixing member comprising a sealing portion and a second connecting portion; the sealing portion being adapted to seal the liquid injection hole, and the second connecting portion being adapted to be fixedly connected to the first connecting portion by a mechanical structure.

[0005] In some embodiments, the cover plate comprises an outer peripheral portion and a liquid injection portion, and the outer peripheral portion and the liquid injection portion form a fixing space, and at least part of the second connecting portion is arranged in the fixing space.

[0006] In some embodiments, the liquid injection portion comprises the liquid injection hole and the first connecting portion, and the first connecting portion is arranged on the outer wall of the liquid injection hole and extends towards the fixing space, so that the first connecting portion is adapted to be connected to the second connecting portion by a mechanical structure.

[0007] In some embodiments, the outer peripheral portion of the cover plate comprises a first portion and a second portion connected in sequence, the first portion is connected to the outer wall of the liquid injection hole, and the second portion is connected to the side of the first portion away from the liquid injection hole; the first portion, the second portion, and the liquid injection portion enclose the fixing space; the liquid injection portion comprises a third surface perpendicular to the first direction and close to the second connecting portion; the plane where the third surface is located is closer to the second connecting portion than the plane where the tenth surface of the first portion facing the fixing space is located, and the bottom of the fixing space is located in the first portion.

[0008] In some embodiments, the outer peripheral portion of the cover plate further comprises a third portion located on a side of the second portion away from the first portion; the third portion comprises an eighth surface and a ninth surface perpendicular to the first direction, and the ninth surface is adapted to be opposite to the battery cell; and the second portion protrudes from a plane on which the eighth surface is located to be adapted to electrically connect with the circuit assembly.

[0009] In some embodiments, the second connecting portion comprises a body and a connecting member fixedly connected with the body; the body comprises a fourth surface perpendicular to the first direction and away from the sealing portion; and the second portion comprises a sixth surface perpendicular to the first direction and close to the body, and a plane on which the sixth surface is located is coplanar with a plane on which the fourth surface is located.

[0010] In some embodiments, the first connecting portion is a clamping structure arranged on an outer wall of the liquid injection hole.

[0011] In some embodiments, the second connecting portion comprises a body and a connecting member fixedly connected with the body; the connecting member extends towards the first connecting portion relative to the body; and the connecting member is adapted in shape to the first connecting portion to limit connection with the first connecting portion.

[0012] In some embodiments, the connecting member is provided in plurality and is spaced apart on the body.

[0013] In some embodiments, the connecting member is spaced apart along a circumferential edge of the body.

[0014] In some embodiments, the plurality of connecting members are spaced apart by equal distances in the circumferential direction of the body.

[0015] In some embodiments, the connecting member comprises a connecting portion and a clamping portion; one end of the connecting portion is fixedly connected with the clamping portion, and the other end of the connecting portion is fixedly connected with the body; and the clamping portion is adapted to clamp with the first connecting portion.

[0016] In some embodiments, the connecting portion is provided with a weakened portion recessed towards a straight line on which a center line of the liquid injection hole is located.

[0017] In some embodiments, the sealing portion is adapted to be arranged in the liquid injection hole to seal the liquid injection hole; the second connecting portion comprises a body and a connecting member fixedly connected with the body; and in the first direction, the sealing portion abuts against the body.

[0018] In some embodiments, the sealing portion is interference-fitted in the liquid injection hole to seal the liquid injection hole.

[0019] In some embodiments, the second connecting part comprises a body and a connecting piece fixedly connected with the body, the sealing part comprises a first sealing part and a second sealing part, the first sealing part penetrates the liquid injection hole, the second sealing part is connected to a side of the first sealing part close to the body and abuts against the body, and the second sealing part comprises a first surface and a second surface oppositely arranged in a direction perpendicular to the first direction.

[0020] The cover plate is provided with a peripheral part and a liquid injection part, the peripheral part and the liquid injection part form a fixing space, and at least part of the second connecting part is arranged in the fixing space.

[0021] The liquid injection part comprises a third surface perpendicular to the first direction and close to the second connecting part, the body comprises a fourth surface and a fifth surface oppositely arranged in a direction perpendicular to the first direction, the first surface abuts against the fifth surface, and the second surface abuts against the third surface.

[0022] In some embodiments, the second sealing part is interference-fitted between the fifth surface and the third surface.

[0023] In some embodiments, the cover plate comprises a seventh surface perpendicular to the first direction and adapted to be opposite to the electric core, the seventh surface is provided with a recessed part recessed towards the second connecting part, the recessed part is in communication with the liquid injection hole, and the recessed part is adapted to accommodate electrolyte.

[0024] In some embodiments, the cover plate is provided with a peripheral part and a liquid injection part, the peripheral part and the liquid injection part form a fixing space, at least part of the second connecting part is arranged in the fixing space, and the recessed part is arranged along the circumferential direction of the liquid injection part.

[0025] The application further provides a battery, which comprises the cover plate assembly, a shell and an electric core.

[0026] The application further provides a battery assembly, which comprises the battery and a circuit assembly.

[0027] The application further provides a power utilization device, which comprises the battery and / or the battery assembly.

[0028] The cover plate assembly of the present application, by setting the first connecting part on the cover plate, setting the connecting piece on the second connecting part, and mechanically connecting the connecting piece and the first connecting part to realize the fixed connection of the second connecting part and the first connecting part, cancels the welding process of the second connecting part and the cover plate, thereby not only saving the welding cost, but also avoiding the deformation of the cover plate that may be caused by welding, avoiding the phenomenon of explosive welding or poor welding, thereby improving the yield of the product. Therefore, the application of the present application not only saves the production cost of the battery, but also improves the yield of the battery.

[0029] Additional aspects and advantages of the embodiments of the present application will be in part apparent and in part pointed out hereinafter in the description of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the description of the embodiments, taken in conjunction with the following drawings, in which:

[0031] Figure 1 is a schematic view of a cross section of the cover plate of some embodiments of the present application;

[0032] Figure 2 is a schematic view of a cross section of the second connecting part of some embodiments of the present application;

[0033] Figure 3 is a schematic view of a cross section of the cover plate assembly of some embodiments of the present application;

[0034] Figure 4 is a schematic view of a cross section of the battery of some embodiments of the present application;

[0035] Figure 5 is a schematic view of a top view of the second connecting part of some embodiments of the present application;

[0036] Figure 6 is a schematic view of a bottom view of the second connecting part of some embodiments of the present application;

[0037] Figure 7 is a schematic view of a cross section of the sealing part of some embodiments of the present application.

[0038] Explanation of main element symbols:

[0039] 10 - cover plate assembly; 100 - cover plate; 110 - liquid injection part; 111 - liquid injection hole; 112 - first connecting part; 200 - second connecting part; 210 - body; 220 - connecting piece; 221 - clamping part; 222 - connecting part; 2221 - weak part; 2222 - sub connecting part; 300 - sealing part; 310 - first sealing part; 320 - second sealing part; 321 - first surface; 322 - second surface; 113 - third surface; 212 - fourth surface; 211 - fifth surface; 102 - sixth surface; seventh surface - 103, eighth surface - 105; tenth surface - 104; 1000 - battery; 400 - rubber strip; 500 - shell; 600 - fixing piece; 130 - fixing space; 120 - recess; 01 - first part; 02 - second part; 03 - third part. DETAILED DESCRIPTION

[0040] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or similar components have the same or similar designations throughout the various figures. Embodiments described below are examples in which similar or like elements are numbered identically throughout the various figures. The embodiments described below are exemplary only, and are not to be construed as limiting the embodiments of the present application.

[0041] In the prior art, the battery liquid injection hole sealing method is usually to block the liquid injection hole with a fixing piece, and to connect between the liquid injection hole and the fixing piece by laser welding. This not only has high equipment cost, high requirement for the welding piece, high operation difficulty and high risk coefficient, but also can cause deformation of the cover plate during welding, and can easily cause the phenomenon of explosive welding or poor welding, thereby causing damage to the battery cell and affecting the yield.

[0042] To solve the above problems, the present patent proposes a cover plate assembly 10, which comprises a cover plate 100 and a fixing piece 600, wherein the cover plate 100 is provided with a liquid injection hole 111 and a first connecting part 112, and the fixing piece 600 comprises a second connecting part 200 and a sealing part 300; the sealing part 300 is adapted to seal the liquid injection hole 111, and the second connecting part 200 and the first connecting part 112 can be fixedly connected by a mechanical structure, thereby realizing the fixed connection of the cover plate 100 and the fixing piece 600, thereby canceling the welding process, avoiding the deformation of the cover plate that can be caused by welding, avoiding the phenomenon of explosive welding or poor welding, and thereby improving the yield of the product. The application of the present application not only saves the production cost of the battery and improves the yield of the battery, but also makes the packaging process of the battery simpler and more efficient. It should be noted that the mechanical connection between the second connecting part 200 and the first connecting part 112 can be clamping, concave-convex matching connection, screwing, riveting, etc. The mechanical connection capable of realizing the fixed connection of the second connecting part 200 and the first connecting part 112 is within the protection scope of the present application, and is not specifically limited herein.

[0043] Generally, the sealing part 300 is placed in the liquid injection hole 111 to seal the liquid injection hole 111, i.e. the sealing part 300 and the liquid injection hole 111 are completely abutted, which can better seal the liquid injection hole 111 by the sealing part 300, so that the electrolyte cannot flow out of the battery through the liquid injection hole. It should be said that the second connecting part 200 is used to limit the sealing part 300, i.e. even if the battery has a very large pressure, the sealing part 300 is still located in the liquid injection hole 111, so as to avoid the sealing part 300 from being separated from the liquid injection hole 300 under the action of pressure.

[0044] In some embodiments, referring to Figures 1-4 The cover plate 100 further comprises an outer peripheral part and a liquid injection part 110. The liquid injection hole 111 and the first connecting part 112 are arranged on the liquid injection part 110, and the liquid injection hole 111 penetrates the liquid injection part 110 along the first direction X. The outer peripheral part and the liquid injection part 110 form a fixing space 130, and at least part of the second connecting part 200 is arranged in the fixing space 130, so that the fixing space 130 can accommodate the second connecting part 200, so that the second connecting part 200 can be mechanically connected with the first connecting part 112, thereby realizing the fixed connection between the cover plate 100 and the second connecting part 200.

[0045] In some embodiments, the first connecting part 112 is a clamping structure extending towards the fixing space 130. In some embodiments, the first connecting part 112 can be an inclined clamping protrusion. Referring to Figure 1 The inclined clamping protrusion refers to a protrusion that protrudes in a certain direction and has an inclined surface. Such an inclined clamping protrusion can make it easier for the structure mechanically connected thereto to be clamped with the inclined surface. Of course, the first connecting part 112 can also be other clamping structures suitable for mechanical connection, such as a clamping ring, a threaded hole, a riveting structure, etc., which are not limited specifically herein.

[0046] In some embodiments, referring to Figures 1-4 The first connecting part 112 can be arranged at any height position of the outer wall of the liquid injection hole 111, as long as the first connecting part 112 can be fixedly matched with the connecting part 220. In some embodiments, the connecting part 220 and the first connecting part 112 are clamped or buckled, thereby realizing the fixed connection between the second connecting part 200 and the liquid injection part 110. It should be noted that the first connecting part 112 can be multiple, i.e. the first connecting part 112 and the connecting part 220 are correspondingly arranged. However, more commonly, the first connecting part 112 can be arranged around the outer wall of the liquid injection hole 111, i.e. the first connecting part 112 is a ring-shaped inclined clamping protrusion surrounding the outer wall of the liquid injection hole 111.

[0047] In some embodiments, the second connecting part 200 comprises a body 210 and a connecting piece 220 fixedly connected with the body 210, the connecting piece 220 extends towards the first connecting part 112 relative to the body 210, the connecting piece 220 and the first connecting part 112 are adapted in shape to be limited by the first connecting part 112. Referring to Figures 2-3 The connecting piece 220 can be clamped with the first connecting part 112, so that the second connecting part 200 and the liquid injection part 110 are fixedly connected, thereby eliminating the welding of the fixing part 600 and the cover plate 100, avoiding the deformation of the cover plate caused by welding, avoiding the phenomenon of explosive welding or poor welding, thereby improving the yield of the product. Therefore, the application not only saves the production cost of the battery and improves the yield of the battery, but also makes the packaging process of the battery simpler and more efficient. Of course, the connecting piece 220 is not necessarily clamped with the first connecting part 112, but can be riveted, screwed or buckled, and the shape of the connecting piece 220 is not limited here.

[0048] In some embodiments, the fixed connection of the second connecting part 200 and the liquid injection part 110 also needs the cooperation of the sealing part 300, the sealing part 300 comprises a first sealing part 310 and a second sealing part 320, and the first sealing part 310 and the second sealing part 320 can be integrally formed. The first sealing part 310 is used to seal the liquid injection hole 111, and the second sealing part 320 is interference-fitted between the second connecting part 200 and the liquid injection part 110. In some embodiments, the first sealing part 310 and the second sealing part 320 can be integrally formed of a rubber super material, so that the first sealing part 310 and the second sealing part 320 both have good elasticity, the first sealing part 310 is interference-fitted with the liquid injection hole 111, and the second sealing part 320 is interference-fitted between the body 210 and the liquid injection part 110, so that after the battery is packaged, the electrolyte in the battery cannot flow out of the battery through the first sealing part 310, thereby damaging the battery or damaging the battery. Referring to Figures 1-4 The second sealing part 320 comprises a first surface 321 and a second surface 322 arranged opposite to each other perpendicular to the first direction X, the body 210 comprises a fifth surface 211 close to the liquid injection hole 111 and a fourth surface 212 opposite to the fifth surface 211, and the liquid injection part 110 comprises a third surface 113 close to the body 210, so that the second sealing part 320 is arranged between the fifth surface 211 and the third surface 113, and the second sealing part 320 is interference-fitted with the fifth surface 211 and the third surface 113 due to its good elasticity, and the first sealing part 310 is interference-fitted with the liquid injection hole 111, thereby realizing the sealing of the liquid injection hole 111, so that the electrolyte in the battery cannot flow out through the liquid injection hole 111 after the battery is sealed.

[0049] It should be noted that in actual production and assembly, the thickness of the second sealing portion 320 in the first direction X is generally greater than the distance between the third surface 113 and the fifth surface 211 in the first direction X after the connecting piece 220 and the first connecting portion 112 are fixedly connected, so that the second sealing portion 320 is in interference fit between the third surface 113 and the fifth surface 211.

[0050] In some embodiments, the outer peripheral portion includes a first portion 01, a second portion 02, and a third portion 03 connected in sequence, wherein the first portion 01 is connected to the outer wall of the liquid injection hole 111, the second portion 02 is connected to the side of the first portion 01 away from the liquid injection hole 111, and the third portion 03 is connected to the side of the second portion 02 away from the first portion 01. Reference Figure 1 And Figure 3 The first portion 01, the second portion 02, and the liquid injection portion 110 enclose the fixing space 130, the plane where the third surface 113 is located is closer to the plane where the first surface 321 is located than the plane where the tenth surface 104 of the fixing space 130 is located relative to the first portion 01, and the bottom of the fixing space 130 is located at the first portion 01, so that the second connecting portion 200 can be arranged in the fixing space 130 and mechanically connected with the first connecting portion 112.

[0051] In some embodiments, the third portion (03) includes an eighth surface 105 and a ninth surface perpendicular to the first direction X, wherein the ninth surface is opposite to the battery cell, and the second portion (02) protrudes from the plane where the eighth surface (105) is located, so that the protruding second portion can be better electrically connected with the circuit assembly and increase the stability of the electrical connection with the circuit assembly.

[0052] In some embodiments, further, the second portion 01 includes a sixth surface 102 perpendicular to the first direction X and suitable to be opposite to the battery cell, and the third portion includes an eighth surface 105 perpendicular to the first direction X and suitable to be opposite to the battery cell, and the sixth surface 102 protrudes from the plane where the eighth surface 105 is located, so that the second surface 102 can be more conveniently electrically connected with the external device.

[0053] In some embodiments, the plane where the fourth surface 212 of the body 210 away from the sealing portion 300 is located is coplanar with the plane where the sixth surface 102 is located, that is, when the sixth surface 102 is electrically connected with the external device, the fourth surface 212 can also be electrically connected with the external device, which not only increases the contact area of the electrical connection, but also increases the overcurrent capacity of the electrical connection with the external device and improves the reliability of the cover plate assembly.

[0054] It should be noted that in some embodiments, the cover plate 100 does not provide the third part 03, and the surface opposite to the battery cell can also achieve electrical connection with the external device, and in this case, the third part 03 is not required, that is, the sixth surface 102 does not need to protrude from the cover plate, and the electrical connection with the external device can still be achieved, and details are not repeated here.

[0055] In some embodiments, referring to Figure 6 , the connecting piece 220 on the second connecting part 200 is provided in multiple numbers and is arranged at equal intervals in the circumferential direction of the body 210. In some embodiments, in order to make the connection of the second connecting part 200 and the liquid injection part 110 more reliable, the connecting piece 220 is arranged at equal intervals in the circumferential direction of the body 210, so that the fixed connection of the second connecting part 200 and the liquid injection part 110 is more reliable, so that even if the battery is subjected to vibration or impact in the motion working condition, and there is high pressure inside the battery, the second connecting part 200 can still be fixedly connected with the liquid injection part 110. For example Figure 6 , four connecting pieces 220 are arranged at equal intervals in the circumferential direction of the second connecting part 200, so that the liquid injection part 110 and the connecting piece 220 can be fixedly connected, thereby not only saving certain cost, but also simple installation. Of course, in order to increase the reliability of the fixed connection of the second connecting part 200 and the liquid injection part 110, a larger number of connecting pieces 220 can also be arranged uniformly in the circumferential direction of the body 210, and details are not limited here.

[0056] In some embodiments, referring to Figure 3 , the connecting piece 220 includes a connecting part 222 and a clamping part 221, the connecting part 222 is fixedly connected with the body 210 and the clamping part 221, and the clamping part 221 can be mechanically connected with the first connecting part 112 to achieve fixed connection, so that the second connecting part 200 and the liquid injection part 110 are fixedly connected. Referring to Figure 2 , the clamping part 221 is a right-angle buckle in some embodiments, and it should be noted that the clamping part 221 in the present application is not limited to a specific form, and can be a right-angle buckle or other forms of clamping part, as long as the clamping part 221 can be mechanically connected with the first connecting part 112 to achieve fixed connection, and details are not limited here.

[0057] In some embodiments, referring to Figure 2 and Figure 5 , a weak part 2221 recessed towards the straight line where the center line of the liquid injection hole 111 is located can also be arranged on the connecting part 222, and the weak part 2221 penetrates the connecting part 222 in the circumferential direction of the body 210, and the weak part 2221 has an opening, and the opening is oriented in the direction from the center of the body to the circumferential edge of the body, that is Figure 2The connection part 222 includes the weak part 2221 and the sub-connection part 2222, and the clamping part 221 and the body 210 are connected by the sub-connection part 2222. When the force on the sub-connection part 2222 is greater than the force on the clamping part 221, the sub-connection part 2222 will break, thereby achieving the disassembly of the second connection part 200 to a certain extent. When the battery 1000 needs to be refilled with electrolyte or needs to be opened, the sub-connection part 2222 can be pried off by using a tool, thereby the second connection part 200 can be removed from the battery 1000, and the electrolyte can be refilled.

[0058] It should be noted that when the battery does not need to have the secondary electrolyte refilling function, the connection part 222 does not need to be provided with the weak part 2221, and the connection part 222 is connected to the body 210 by the sub-connection part 2222. Figure 3 and Figure 4 At this time, the connection part 222 has better reliability and is more secure.

[0059] In some embodiments, the cover plate 100 includes a seventh surface 103 opposite to the cell, and the seventh surface 103 is provided with a recess 120 recessed toward the second connection part 200. The recess 120 is in communication with the electrolyte injection hole 111, and the recess 120 can accommodate electrolyte. When the specification of the battery is fixed, the battery can accommodate more electrolyte, which can increase the cycle life of the battery. Therefore, the recess 120 can increase the cycle life of the battery 1000 by accommodating electrolyte. It should be noted that the ninth surface of the present application can be part of the seventh surface 103.

[0060] It should be noted that the cover plate 100 can be provided with a pressure relief valve. In the prior art, a battery must be provided with a component that can relieve pressure to avoid explosion when a large amount of gas or a large pressure is generated inside the battery. The design of the pressure relief valve is related to the actual placement of the battery, and therefore the pressure relief valve is designed according to the actual situation of the battery. The present application does not specifically limit and discuss the pressure relief valve. When the cover plate 100 of the present application needs to be provided with a pressure relief valve, the cover plate assembly 10 of the present application includes the pressure relief valve. In some embodiments, the specific position of the sub-connection portion 2222 can also be set to make the second connection portion function as a pressure relief valve. When the opening of the weak portion 2221 is oriented in a direction from the circumferential edge of the body towards the center of the body, the sub-connection portion 2222 is closer to the circumferential edge of the body at this time. The thickness of the sub-connection portion 2222 in the direction from the center of the body towards the edge of the body determines the reliability of the fixed connection between the second connection portion 200 and the liquid injection portion 110. When the force that the sub-connection portion 2222 can withstand is relatively small, the gas or pressure inside the battery is too large to cause the sub-connection portion 2222 to break, and the sealing portion 300 to come out of the liquid injection hole 111. At this time, the pressure relief valve is not needed to achieve pressure relief. Of course, this pressure relief scheme requires reasonable design of the thickness of the sub-connection portion 2222 in order to achieve the function of the pressure relief valve. Such embodiments are also within the scope of the present application and are not specifically limited here.

[0061] In some embodiments, the circumferential direction of the cover plate 100 is also provided with a rubber strip 400. The rubber strip 400 can make the cover plate assembly 10 and the shell 500 have an interference fit while making the cover plate 100 and the shell 500 insulated from each other, thereby better sealing the battery 1000. Details are not repeated here.

[0062] The present application also provides a battery 1000, which is provided with the cover plate assembly 10 provided by the present application, as well as a shell and a battery core. The shell and the cover plate assembly together enclose a containing space, and the battery core is contained in the containing space. The battery core and the cover plate assembly are adapted to be electrically connected. In the production process of the battery 10, the cover plate assembly 10 does not need to be welded, and only needs to insert the sealing portion 300 into the liquid injection hole 111 after liquid injection is completed, and then clamps the connecting piece 220 of the second connection portion 200 and the first connection portion 112 at the liquid injection portion 110 of the cover plate 100, to achieve sealing of the liquid injection hole. Therefore, the production cost caused by welding is saved, and the clamping process is simple and easy to operate. Therefore, not only the production time can be saved, but also the defective rate can be reduced to a certain extent.

[0063] The present application also provides a battery assembly, which includes the battery 1000 provided by the present application and a circuit assembly, and the circuit assembly is adapted to be electrically connected to the battery.

[0064] The application further provides a battery 1000 and / or a battery assembly.

[0065] The cover plate assembly of the application is not only suitable for cylindrical batteries, but also suitable for other batteries which need to seal the liquid injection hole, that is, other batteries using the cover plate assembly of the application are also within the protection scope of the application, which are not specifically limited herein.

[0066] In the description of the present specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although the embodiments of the application have been shown and described above, it should be understood that the above embodiments are exemplary and are not to be construed as limiting the application, and those of ordinary skill in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A cover plate assembly (10), characterized in that, include: The cover plate (100) is provided with an injection hole (111) and a first connecting part (112), wherein the injection hole (111) penetrates the cover plate (100) along a first direction. The fastener (600) includes a sealing part (300) and a second connecting part (200); the sealing part is adapted to seal the injection hole (111), and the second connecting part (200) is adapted to be mechanically connected to the first connecting part (112).

2. The cover plate assembly according to claim 1, characterized in that, The cover plate (100) has an outer peripheral portion and an injection portion (110), the outer peripheral portion and the injection portion (110) form a fixed space (130), and at least a portion of the second connecting portion (200) is disposed in the fixed space (130).

3. The cover plate assembly according to claim 2, characterized in that, The injection part (110) is provided with the injection hole (111) and the first connecting part (112). The first connecting part (112) is disposed on the outer wall of the injection hole (111) and extends toward the fixed space (130) so that the first connecting part (112) is adapted to be connected with the second connecting part (200) through a mechanical structure.

4. The cover plate assembly according to claim 2, characterized in that, The outer periphery of the cover plate (100) includes a first part (01) and a second part (02) connected in sequence. The first part (01) is connected to the outer wall of the injection hole (111), and the second part (02) is connected to the side of the first part (01) away from the injection hole. The first part (01), the second part (02) and the injection part (110) enclose the fixed space (130). The injection portion (110) includes a third surface (113) that is perpendicular to the first direction and close to the second connecting portion (200). The plane containing the third surface (113) is closer to the second connection portion (200) than the plane containing the tenth surface (104) of the first portion (01) facing the fixed space (130), and the bottom of the fixed space (130) is located in the first portion (01).

5. The cover plate assembly according to claim 4, characterized in that, The outer periphery of the cover plate (100) further includes a third part (03), which is located on the side of the second part (02) away from the first part (01); The third part (03) includes an eighth surface (105) and a ninth surface perpendicular to the first direction, the ninth surface being adapted to be opposite to the battery cell; The second part (02) protrudes from the plane containing the eighth surface (105) to be electrically connected to the circuit components.

6. The cover plate assembly according to claim 5, characterized in that, The second connecting part (200) includes a body (210) and a connector (220) fixedly connected to the body (210). The body (210) includes a fourth surface (212) perpendicular to the first direction and away from the sealing part (300). The second part (02) includes a sixth surface (102) perpendicular to the first direction and close to the body (210). The plane of the sixth surface (102) and the plane of the fourth surface (212) are coplanar.

7. The cover plate assembly according to any one of claims 1-6, characterized in that, The first connecting part (112) is a snap-fit ​​structure disposed on the outer wall of the injection hole.

8. The cover plate assembly according to claim 7, characterized in that, The second connecting part (200) includes a body (210) and a connector (220) fixedly connected to the body (210). The connector (220) extends relative to the body (210) toward the first connecting part (112). The shape of the connector (220) is adapted to the first connecting part (112) for limiting connection with the first connecting part (112).

9. The cover plate assembly according to claim 8, characterized in that, There are multiple connectors (220), and the connectors (220) are spaced apart on the body (210).

10. The cover plate assembly according to claim 9, characterized in that, The connectors (220) are spaced apart along the circumferential edge of the body (210).

11. The cover plate assembly according to claim 10, characterized in that, The plurality of connectors (220) are spaced equally apart in the circumferential direction of the body (210).

12. The cover plate assembly according to claim 8, characterized in that, The connector (220) includes a connecting part (222) and a snap-fit ​​part (221). One end of the connecting part (222) is fixedly connected to the snap-fit ​​part (221), and the other end of the connecting part (222) is fixedly connected to the body (210). The snap-fit ​​portion (221) is adapted to snap-fit ​​with the first connecting portion (112).

13. The cover plate assembly according to claim 12, characterized in that, The connecting part (222) is provided with a weak part (2221) that is recessed toward the center line of the injection hole.

14. The cover plate assembly according to claim 7, characterized in that, The sealing part (300) is adapted to be disposed in the injection hole (111) to seal the injection hole (111). The second connecting part (200) includes a body (210) and a connecting member (220) fixedly connected to the body (210). Along the first direction, the sealing part (300) abuts against the body (210).

15. The cover plate assembly according to claim 7, characterized in that, The sealing part (300) is press-fitted into the injection hole (111) to seal the injection hole (111).

16. The cover plate assembly according to claim 7, characterized in that: The second connecting part (200) includes a body (210) and a connector (220) fixedly connected to the body (210). The sealing part (300) includes a first sealing part (310) and a second sealing part (320). The first sealing part (310) passes through the injection hole (111). The second sealing part (320) is connected to the side of the first sealing part (310) near the body (210) and abuts against the body (210). The second sealing part (320) includes a first surface (321) and a second surface (322) that are perpendicular to each other in the first direction. The cover plate (100) is provided with an outer peripheral portion and an injection portion (110), the outer peripheral portion and the injection portion (110) form a fixed space (130), and at least a portion of the second connecting portion (200) is disposed in the fixed space (130); The injection portion (110) includes a third surface (113) that is perpendicular to the first direction and close to the second connecting portion (200). The body (210) includes a fourth surface (212) and a fifth surface (211) that are perpendicular to and opposite to each other in the first direction. The first surface (321) and the fifth surface (211) abut against each other, and the second surface (322) and the third surface (113) abut against each other.

17. The cover plate assembly according to claim 16, characterized in that, The second sealing part (320) is interference-fitted between the fifth surface (211) and the third surface (113).

18. The cover plate assembly according to any one of claims 8-17, characterized in that, The cover plate (100) includes a seventh surface (103) perpendicular to the first direction and adapted to be opposite to the battery cell. The seventh surface (103) has a recess (120) recessed toward the second connection portion (200). The recess (120) communicates with the injection hole (111). The recess (120) is adapted to contain electrolyte.

19. The cover plate assembly according to claim 18, characterized in that, The cover plate (100) is provided with an outer peripheral portion and an injection portion (110). The outer peripheral portion and the injection portion (110) form a fixed space (130). At least a portion of the second connecting portion (200) is disposed in the fixed space (130). The recessed portion (120) is disposed around the injection portion (110) in the circumferential direction.

20. A battery, characterized in that, include: The cover plate assembly according to any one of claims 1-19; The housing and the cover assembly together enclose a receiving space; A battery cell, which is housed in the housing space, and the battery cell is electrically connected to the cover plate.

21. A battery assembly, characterized in that, It includes the battery and circuit assembly of claim 20, wherein the circuit assembly is adapted to be electrically connected to the battery.

22. An electrical appliance, characterized in that, Includes the battery of claim 20 and / or the battery assembly of claim 21.

Images