Cover plate assembly for battery, battery, battery pack and electric equipment

Abstract

The utility model discloses a cover plate assembly for a battery, the battery, a battery pack and electric equipment, the cover plate assembly comprises a cover plate body, a first mounting channel is arranged on the cover plate body, and the surface of one side of the cover plate body is a first surface; a communication groove is formed in the second surface of the insulating space ring, and at least part of the bottom wall of the communication groove and the first surface are arranged in a spaced mode to form a first flow gap; the insulating part is arranged in the first mounting channel, the insulating part and the inner wall of the first mounting channel are arranged in a spaced mode to form a second flowing gap, and the first flowing gap communicates with the other side, in the thickness direction, of the cover plate body through the second flowing gap. According to the cover plate assembly designed by the utility model, the first flowing gap is communicated with the outer side of the cover plate body in the thickness direction by utilizing the second flowing gap, so that electrolyte positioned on the outer side of the cover plate body can flow to the first flowing gap through the second flowing gap, and the possibility of forming an electrolytic tank on the outer side of the cover plate body is reduced; and the shell pressure yield of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cover plate assembly for a battery, a battery, a battery pack and an electrical equipment. Background Art

[0002] In the related art, a rubber ring is designed between the cover plate and the pole column of the battery to insulate the pole column from the cover plate and seal the gap between the pole column and the cover plate. In the prior art, when the pole column is installed on the cover plate, the electrolyte inside the battery is likely to overflow to the outside of the cover plate. After the pole column is installed in place, the rubber ring seals the gap between the pole column and the cover plate, and the electrolyte is left outside the cover plate, and an electrolytic cell is formed outside the cover plate, resulting in poor shell pressure of the battery. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a cover plate assembly for a battery. According to the cover plate assembly designed by the utility model, by enabling the electrolyte in the cavity to flow to the other side of the cover plate body through the second flow gap, the second flow gap is used to connect the first flow gap with the outside in the thickness direction of the cover plate body, so that the electrolyte located outside the cover plate body can flow to the first flow gap through the second flow gap, thereby reducing the possibility of forming an electrolytic cell outside the cover plate body and improving the shell pressure yield of the battery.

[0004] The utility model also provides a battery, a battery pack and an electrical equipment with the above cover plate assembly.

[0005] The cover plate assembly according to the utility model includes: a cover plate body, on which a first installation channel is provided, and one surface of the cover plate body in the thickness direction is a first surface; an insulating spacer, which is arranged on the first surface, and the surface of the insulating spacer facing the first surface is a second surface, and a communication groove is also provided on the second surface, and at least part of the bottom wall of the communication groove is spaced from the first surface to form a first flow gap; an insulating member, which is arranged in the first installation channel, and the insulating member is spaced from the inner wall of the first installation channel to form a second flow gap, and the second flow gap connects the first flow gap with the other side of the cover plate body in the thickness direction.

[0006] According to the cover plate assembly of the utility model, the second flow gap is used to connect the first flow gap with the outside in the thickness direction of the cover plate body, so that the electrolyte located outside the cover plate body can flow to the first flow gap through the second flow gap, thereby reducing the possibility of forming an electrolytic cell outside the cover plate body and improving the shell pressure yield of the battery.

[0007] According to some embodiments of the present utility model, a first gap is formed between the second surface and the first surface, and the first flow gap communicates with the first gap.

[0008] According to some embodiments of the present utility model, at least a part of the bottom wall of the communication groove is further provided with a through hole, and the through hole is directly opposite to the first installation channel; the cover plate assembly further includes: a pole column, the pole column is disposed in the first installation channel through the through hole, and the insulating sleeve is sleeved on the outer surface of the pole column and is adapted to space the outer surface of the pole column from the inner wall of the first installation channel.

[0009] According to some alternative embodiments of the present utility model, a second gap is formed between the outer surface of at least a part of the pole column and the inner wall surface of the through hole, and the first flow gap communicates with the second gap.

[0010] According to some specific embodiments of the present utility model, an installation groove is formed in the bottom wall of the communication groove, and the through hole is formed in the bottom wall of the installation groove; one end of the insulating member forms a stop portion, the stop portion is received in the installation groove, and one surface of the stop portion in the thickness direction is spaced apart from the first surface to form at least a part of the first flow gap.

[0011] In some embodiments, the insulating member includes: an insulating sleeve ring, the insulating sleeve ring is configured to be annular, the insulating sleeve ring is disposed in the first installation channel and forms the second flow gap between the insulating sleeve ring and the inner wall of the first installation channel, one end of the insulating sleeve ring is located on one side in the thickness direction of the cover plate body, and the other end of the insulating sleeve ring extends to the other side in the thickness direction of the cover plate body; wherein, the stop portion is located at one end of the insulating sleeve ring and protrudes from the outer peripheral surface of the insulating sleeve ring, and at least a part of the stop portion is directly opposite to and spaced apart from the first surface in the thickness direction.

[0012] According to some alternative embodiments of the present utility model, in the thickness direction of the cover plate body, the maximum distance between the bottom wall of the installation groove and the first surface is d3, the thickness of the stop portion is d4, and it satisfies: d3 > d4.

[0013] According to some specific embodiments of the present utility model, it satisfies: 0.1 mm ≤ d3 - d4 ≤ 1 mm.

[0014] According to some alternative embodiments of the present utility model, the insulating sleeve ring and the stop portion are integrally formed.

[0015] According to some alternative embodiments of the present utility model, it further includes: an insulating ring, which is located on the other side in the thickness direction of the cover plate body, and the insulating ring is sleeved on the outer peripheral surface of the pole column; a connecting ring, which is located between the insulating ring and the cover plate body and is sleeved on the outer peripheral surface of the pole column, one side in the thickness direction of the connecting ring is connected to the insulating ring, and the other side in the thickness direction of the connecting ring is connected to the cover plate body; wherein the connecting ring is arranged at an interval from the outer peripheral surface of the pole column, the insulating sleeve is located between the connecting ring and the outer peripheral surface of the pole column, and the insulating sleeve is spaced from the connecting ring to define a third flow gap, and the third flow gap is communicated with the second flow gap.

[0016] According to some specific embodiments of the present utility model, at least part of the surface of the connecting ring sleeved on the insulating sleeve is recessed to define a cavity with the insulating ring, and the cavity is communicated with the third flow gap.

[0017] In some embodiments, the distance between the surface of the insulating ring facing the cavity and the bottom wall of the installation groove is d1, and in the thickness direction of the cover plate body, the size of the insulating sleeve is d2, and it satisfies: d2 > d1.

[0018] Furthermore, it satisfies: 0 < d2 - d1 ≤ 1 mm.

[0019] Next, a battery according to another embodiment of the present utility model will be briefly described.

[0020] The battery according to the present utility model includes the cover plate assembly described in any one of the above embodiments. Since the battery according to the present utility model is provided with the cover plate assembly of the above embodiments, the second flow gap is used to communicate the first flow gap with the outside in the thickness direction of the cover plate body, so that the electrolyte located outside the cover plate body can flow through the second flow gap to the first flow gap, thereby reducing the possibility of forming an electrolytic cell outside the cover plate body and improving the shell pressure yield of the battery.

[0021] Next, a battery pack according to another embodiment of the present utility model will be briefly described.

[0022] The battery pack according to the present utility model includes the battery described in the above embodiments. Since the battery according to the present utility model is provided with the cover plate assembly of the above embodiments, by using the second flow gap to communicate the first flow gap with the outside in the thickness direction of the cover plate body, so that the electrolyte located outside the cover plate body can flow through the second flow gap to the first flow gap, thereby reducing the possibility of forming an electrolytic cell outside the cover plate body and improving the shell pressure yield of the battery.

[0023] Next, an electrical equipment according to another embodiment of the present utility model will be briefly described.

[0024] The electrical equipment according to the present utility model includes the battery pack or battery described in the above embodiments. Since the battery pack according to the present utility model is provided with the cover plate assembly of the above embodiments, the first flow gap is communicated with the outside in the thickness direction of the cover plate body by using the second flow gap, so that the electrolyte located outside the cover plate body can flow into the first flow gap through the second flow gap, thereby reducing the possibility of forming an electrolytic cell outside the cover plate body and improving the shell pressure yield rate of the battery.

[0025] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is the overall structural diagram of the cover plate assembly according to the embodiment of the present utility model.

[0028] Figure 2 is Figure 1 the exploded view of the structure in.

[0029] Figure 3 is the structural diagram of the insulating spacer according to the embodiment of the present utility model.

[0030] Figure 4 is Figure 1 the partial cross-sectional view of the structure in.

[0031] Figure 5 is Figure 4 the enlarged view of the structure at A in.

[0032] Figure 6 is Figure 5 the enlarged view of the structure at B in.

[0033] Figure 7 is the structural diagram of the cover plate body according to the embodiment of the present utility model.

[0034] Figure 8 is the structural diagram of the insulating member according to the embodiment of the present utility model.

[0035] Reference Signs:

[0036] 1, cover plate assembly;

[0037] 10, cover plate body; 10a, first installation channel; 10b, receiving groove; 11, first surface; 11a, first gap;

[0038] 20, insulating spacer; 20b, second flow gap; 21, second surface;

[0039] 21a, through-hole; 21b, mounting groove; 21c, communicating groove;

[0040] 221, insulating ring; 222, connecting ring; 222a, third flow gap; 222b, cavity;

[0041] 30, pole column; 30a, second gap; 31, head;

[0042] 40, insulating member; 41, insulating sleeve; 42, abutting portion; 42a, first flow gap;

[0043] 60, electrical mating portion. Detailed implementation manner

[0044] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0045] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection, an electrical connection, or a connection that allows mutual communication; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact of the first and second features, or may include the case where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0049] Reference is made below to Figures 1-8 describe the cover plate assembly 1 for a battery according to an embodiment of the present utility model.

[0050] As Figure 1 、 Figure 4 shown, the cover plate assembly 1 according to the present utility model includes a cover plate body 10, an insulating spacer 20, and an insulating member 40.

[0051] A first installation channel 10a is provided on the cover plate body 10. One surface on the thickness direction side of the cover plate body 10 is a first surface 11. The insulating spacer 20 is disposed on the first surface 11. The insulating spacer 20 is used to separate the cover plate body 10 from the charged components inside the battery, such as separating the cover plate body 10 from the battery cell, reducing the possibility of battery leakage.

[0052] The surface of the insulating spacer 20 facing the first surface 11 is a second surface 21. A communication groove 21c is further formed on the second surface 21. At least part of the bottom wall of the communication groove 21c is spaced from the first surface 11 to form a first flow gap 42a. The insulating member 40 is disposed in the first installation channel 10a,

[0053] The insulating member 40 is spaced from the inner wall of the first installation channel 10a to form a second flow gap 20b. The second flow gap 20b communicates the first flow gap 42a with the other side in the thickness direction of the cover plate body 10.

[0054] Here, one side of the cover body 10 is referred to as the inner side, and the other side is referred to as the outer side. The insulating spacer 20 is disposed on the inner side of the cover body 10. The second flow gap 20b communicates the first flow gap 42a with the outer side in the thickness direction of the cover body 10, so that the electrolyte located on the outer side of the cover body 10 can flow through the second flow gap 20b to the first flow gap 42a, and the electrolyte is stored in the second flow gap 20b and the first flow gap 42a, so as to reduce the possibility of forming an electrolytic cell on the outer side of the cover body 10, thereby reducing the probability of poor battery case pressure.

[0055] It should be explained here that the case pressure yield of the battery refers to the proportion of batteries that are determined to meet the specified quality requirements after testing during the manufacturing process of the battery. Generally speaking, it is the proportion of qualified batteries among the produced batteries. Among them, internal battery failures, overcharging, over-discharging, or leakage, etc. will all cause poor battery case pressure. By reducing the probability of forming an electrolytic cell on the outer side of the cover body 10, it is convenient to improve the case pressure yield of the battery.

[0056] According to the cover assembly 1 of the present utility model, the second flow gap 20b is used to communicate the first flow gap 42a with the outer side in the thickness direction of the cover body 10, so that the electrolyte located on the outer side of the cover body 10 can flow through the second flow gap 20b to the first flow gap 42a, and the electrolyte is stored in the second flow gap 20b and the first flow gap 42a, so as to reduce the possibility of forming an electrolytic cell on the outer side of the cover body 10 and improve the case pressure yield of the battery.

[0057] According to some embodiments of the present utility model, as Figure 6 shown, a first gap 11a is formed between the second surface 21 and the first surface 11. The first flow gap 42a communicates with the first gap 11a, so that the electrolyte in the first gap 11a can flow to the first flow gap 42a, and then the electrolyte is stored in the first flow gap 42a, so as to reduce the possibility of forming an electrolytic cell on the outer side of the cover body 10 and improve the case pressure yield of the battery.

[0058] Specifically, when the cover body 10 is installed outside the insulating spacer 20, the electrolyte in the battery is likely to overflow between the cover body 10 and the insulating spacer 20, that is, part of the electrolyte is located in the first gap 11a, making the first gap 11a communicate with the first flow gap 42a. This facilitates the discharge of the electrolyte in the first gap 11a, and then facilitates the subsequent sealing of the first gap 11a or the fitting of the second surface 21 and the first surface 11.

[0059] According to some alternative embodiments of the present utility model, as Figure 3As shown, at least part of the bottom wall of the communication groove 21c is further provided with a through hole 21a, and the through hole 21a is opposite to the first installation channel 10a to form a through hole communicating with the first installation channel 10a on the insulating spacer 20, so as to reserve space for the installation of the pole column 30 and utilize the pole column 30 to conduct current.

[0060] The cover plate assembly 1 further includes: a pole column 30, the pole column 30 is disposed in the first installation channel 10a through the through hole 21a to conduct current by using the pole column 30. An insulating member 40 is sleeved on the outer surface of the pole column 30 and is adapted to space the outer surface of the pole column 30 from the inner wall of the first installation channel 10a, so as to isolate the pole column 30 from the inner wall of the first installation channel 10a and prevent the pole column 30 from contacting the cover plate body 10, thereby facilitating the reduction of the possibility of battery leakage.

[0061] In some embodiments, as Figure 3 、 Figure 4 shown, in the thickness direction of the cover plate body 10, one end of the pole column 30 is located on one side of the cover plate body 10, and the other end of the pole column 30 extends into the inner side of the cover plate body 10 through the first installation channel 10a, the installation groove 21c and the through hole 21a, so that one end of the pole column 30 can pass through the cover plate body 10 and the insulating spacer 20 to be electrically connected to an external circuit component, and the other end of the pole column 30 can extend into the battery to be connected to the battery core inside the battery, so as to conduct current by using the pole column 30.

[0062] According to some embodiments of the present invention, as Figure 5 shown, a second gap 30a is formed between at least part of the outer surface of the pole column 30 and the inner wall surface of the through hole 21a, and the first flow gap 42a communicates with the second gap 30a, so that the electrolyte in the first flow gap 42a can enter the second gap 30a, and then the second gap 30a is used to store the electrolyte, reducing the possibility of forming an electrolytic cell outside the cover plate body 10 and improving the shell pressure yield of the battery.

[0063] According to some embodiments of the present invention, as Figure 3 、 Figure 4 shown, the bottom wall of the communication groove 21c is provided with an installation groove 21b, and the bottom wall of the installation groove 21b is provided with a through hole 21a to form a through hole communicating with the first installation channel 10a on the insulating spacer 20, so as to reserve space for the installation of the pole column 30 and utilize the pole column 30 to conduct current

[0064] One end of the insulating member 40 is formed with a stop portion 42, the stop portion 42 is received in the installation groove 21b, and one surface of the stop portion 42 in the thickness direction is spaced from the first surface 11 to form at least part of the first flow gap 42a, so that the stop portion 42 is received in the installation groove 21b to be able to limit the position of the stop portion 42, and further limit the position of the insulating member 40.

[0065] In some embodiments, the abutting portion 42 abuts against the bottom wall and the side wall of the mounting groove 21b to close the through hole 21a.

[0066] Specifically, when installing the pole post 30 and the insulating member 40, after the electrolyte in the first flow gap 42a can enter the second gap 30a, the through hole 21a is closed by the abutting portion 42, thereby separating the first flow gap 42a and the second gap 30a, and preventing the electrolyte in the second gap 30a from flowing to the outside of the cover body 10 through the first flow gap 42a and the second flow gap 20b. Furthermore, it is convenient to reduce the possibility of forming an electrolytic cell outside the cover body 10 and improve the shell pressure yield of the battery.

[0067] According to some embodiments of the present invention, as Figure 5 , Figure 8 shown, the insulating member 40 includes an insulating collar 41. The insulating collar 41 is configured as a ring. The insulating collar 41 is disposed in the first installation channel 10a and forms a second flow gap 20b between the insulating collar 41 and the inner wall of the first installation channel 10a. One end of the insulating collar 41 is located on one side in the thickness direction of the cover body 10, and the other end of the insulating collar 41 extends to the other side in the thickness direction of the cover body 10, so as to sufficiently separate the inner wall of the first installation channel 10a and the components inside the insulating collar 41, thereby preventing the charged components inside the insulating collar 41 from contacting the inner wall of the first installation channel 10a and reducing the possibility of battery leakage.

[0068] In some embodiments, the cover assembly 1 further includes a pole post 30. The pole post 30 is disposed in the first installation channel 10a. The insulating collar 41 is sleeved on the outer periphery of the pole post 30 to insulate the pole post 30 from the inner wall of the first installation channel 10a and prevent the pole post 30 from contacting the cover body 10, thereby facilitating the reduction of the possibility of battery leakage.

[0069] Wherein, one end of the insulating collar 41 is located on one side in the thickness direction of the cover body 10, and the other end of the insulating collar 41 extends to the other side in the thickness direction of the cover body 10, so as to sufficiently insulate the pole post 30 from the conductive components located outside the pole post 30, thereby facilitating the reduction of the possibility of battery leakage.

[0070] According to some alternative embodiments of the present invention, as Figure 4 , Figure 5 shown, the abutting portion 42 is located at one end of the insulating collar 41 and protrudes from the outer peripheral surface of the insulating collar 41, so that the abutting portion 42 can abut against the inner wall of the mounting groove 21b, thereby limiting the position of the insulating member 40.

[0071] Among them, at least part of the abutting portion 42 faces and is spaced apart from the first surface 11 in the thickness direction to form a first flow gap 42a, so that the electrolyte located outside the cover body 10 can flow from the second flow gap 20b to the first flow gap 42a, and the electrolyte is stored in the second flow gap 20b and the first flow gap 42a, thereby reducing the possibility of forming an electrolytic cell outside the cover body 10, and further reducing the probability of poor battery case pressure.

[0072] In some embodiments, the bottom of the abutting portion 42 abuts against the bottom wall of the mounting groove 21b, and the side wall of the abutting portion 42 facing away from the insulating collar 41 abuts against the side wall of the mounting groove 21b to define the radial position of the insulating member 40 along the first mounting channel 10a, preventing the insulating member 40 from moving radially along the first mounting channel 10a.

[0073] In some specific embodiments of the present invention, as Figure 5 shown, in the thickness direction of the cover body 10, the maximum distance between the bottom wall of the mounting groove 21b and the first surface 11 is d3, and the thickness of the abutting portion 42 is d4, and it satisfies: d3 > d4, so that there is a distance between the abutting portion 42 and the cover body 10, preventing the abutting portion 42 from blocking the second flow gap 20b, enabling the electrolyte outside the cover body 10 to flow from the second flow gap 20b to the first flow gap 42a, avoiding the formation of an electrolytic cell outside the cover body 10, and facilitating the improvement of the case pressure yield of the battery.

[0074] In some embodiments, as Figure 5 shown, it satisfies: 0.1mm ≤ d3 - d4 ≤ 1mm, so that there is a gap between the abutting portion 42 and the cover body 10, enabling the electrolyte outside the cover body 10 to flow from the second flow gap 20b to the other side of the cover body 10 and flow to the gap between the cover body 10 and the abutting portion 42. The electrolyte is stored in the second flow gap 20b and the first flow gap 42a, avoiding the formation of an electrolytic cell outside the cover body 10, and facilitating the improvement of the case pressure yield of the battery.

[0075] Among them, d3 - d4 ≥ 0.1mm is used to ensure that there is a certain gap between the abutting portion 42 and the cover body 10, enabling the electrolyte in the cavity 222b to flow from the second flow gap 20b to the other side of the cover body 10 and flow to the gap between the cover body 10 and the abutting portion 42. Making d3 - d4 ≤ 1mm is to prevent the gap between the abutting portion 42 and the cover body 10 from being too large, which may affect the assembly strength or occupy too much space.

[0076] In some examples, d3 - d4 can be 0.1mm, 0.2, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 0.9mm or 1mm.

[0077] According to some alternative embodiments of the present utility model, the insulating collar 41 and the abutting portion 42 are integrally formed. In this way, there is no need to consider the gap between the insulating collar 41 and the abutting portion 42, and there is no need to provide a sealing member between the insulating collar 41 and the abutting portion 42. At the same time, it is convenient to install the insulating collar 41 and the abutting portion 42, which helps to save installation time.

[0078] In some embodiments, both the insulating collar 41 and the abutting portion 42 are rubber parts, and the insulating collar 41 and the abutting portion 42 can be integrally formed by injection molding, compression molding, etc.

[0079] According to some specific embodiments of the present utility model, the cover plate assembly 1 further includes an insulating ring 221 and a connecting ring 222. The insulating ring 221 is located on the other side in the thickness direction of the cover plate body 10. The insulating ring 221 is sleeved on the outer peripheral surface of the pole column 30. The connecting ring 222 is located between the insulating ring 221 and the cover plate body 10 and is sleeved on the outer peripheral surface of the pole column 30. One side in the thickness direction of the connecting ring 222 is connected to the insulating ring 221, and the other side in the thickness direction of the connecting ring 222 is connected to the cover plate body 10 to fix the connecting ring 222 on the cover plate body 10. At the same time, the position of the insulating ring 221 is supported by the connecting ring 222, and then the positions of the pole column 30 are jointly defined by the connecting ring 222 and the insulating ring 221.

[0080] In some embodiments, as Figure 4 shown, one side of the pole column 30 away from the cover plate body 10 has a head 31, and the head 31 protrudes in the circumferential direction of the pole column 30. The insulating ring 221 and the connecting ring 222 are located between the head 31 and the cover plate body 10 to support the position of the pole column 30 through the head 31.

[0081] Among them, an insulating ring 221 is provided between the connecting ring 222 and the head 31 to insulate the pole column 30 from the connecting ring 222, prevent the current on the pole column 30 from flowing to the connecting ring 222 and the cover plate body 10, and thus facilitate reducing the possibility of battery leakage.

[0082] In some embodiments, the insulating collar 41 is sleeved on the pole column 30, and the abutting portion 42 protrudes from the outer peripheral surface of the insulating collar 41 at one end of the insulating collar 41 and is adapted to abut against the bottom wall of the installation groove 21b. One end of the insulating collar 41 away from the abutting portion 42 abuts against the insulating ring 221 to limit the insulating member 40 between the bottom wall of the installation groove 21b and the insulating ring 221, and further define the position of the insulating member 40 to prevent the insulating member 40 from moving axially along the first installation channel 10a.

[0083] Meanwhile, the insulating member 40 and the insulating ring 221 are abutted and fitted to sufficiently separate the pole column 30 from the components outside the pole column 30 by using the insulating member 40 and the insulating ring 221. For example, the pole column 30 is separated from the connecting ring 222, and the pole column 30 is separated from the cover body 10, so as to avoid the contact between the connecting ring 222, the cover body 10 and the pole column 30, which is convenient for reducing the possibility of battery leakage.

[0084] In some embodiments, the main material of the cover body 10 is aluminum, so that the cover body 10 has excellent corrosion resistance and is not easy to rust and corrode. At the same time, since aluminum has electrical conductivity, in order to avoid electrification on the cover body 10, it is necessary to use the insulating member 40 to separate the pole column 30 and the cover body 10 to avoid leakage.

[0085] In some embodiments, the insulating ring 221 is a ceramic part. Since the ceramic part has insulating properties, even if the insulating ring 221 contacts the head 31 of the pole column 30, no leakage will occur.

[0086] In some examples, as Figure 4 shown, the insulating ring 221 is located inside the head 31 of the pole column 30. The insulating ring 221 and the head 31 of the pole column 30 are connected together by brazing. The connecting ring 222 is located inside the insulating ring 221. The inner surface of the insulating ring 221 abuts against the outer surface of the connecting ring 222 and is connected together by brazing.

[0087] Among them, brazing can not only connect two components together, but also seal the gap between the two components, thereby avoiding the electrolyte remaining in the gap between the two components.

[0088] In some embodiments, as Figure 4 shown, the cover assembly 1 further includes an electrical connection piece and an electrical cooperation part 60. The electrical cooperation part 60 is used to cooperate with external circuit components. The electrical connection piece is located inside the cover body 10. One end of the pole column 30 can pass through the insulating spacer 20 and the cover body 10 to be electrically connected to the electrical cooperation part 60. The other end of the pole column 30 can extend into the battery to be connected to the electrical connection piece. The electrical connection piece is connected to the battery cell inside the battery to transfer the current at the battery cell to the pole column 30, and the current is delivered to the external circuit components through the pole column 30 and the electrical cooperation part 60.

[0089] Among them, the main material of the electrical cooperation part 60 is aluminum, so that the electrical cooperation part 60 has excellent electrical conductivity and the characteristic of elastic deformation, which is convenient for the electrical cooperation part 60 to cooperate with external circuit components.

[0090] In some specific embodiments of the present invention, as Figure 5As shown, the connecting ring 222 is spaced from the outer peripheral surface of the terminal post 30. The insulating collar 41 is located between the connecting ring 222 and the outer peripheral surface of the terminal post 30. The insulating collar 41 is spaced from the connecting ring 222 to define a third flow gap 222a. The third flow gap 222a communicates with the second flow gap 20b, so that the electrolyte in the third flow gap 222a can flow through the second flow gap 20b to the first flow gap 42a, thereby preventing the electrolyte from remaining in the third flow gap 222a and preventing an electrolytic cell from being formed outside the cover body 10, so as to reduce the probability of poor battery shell pressure.

[0091] In some embodiments, at least part of the surface of the insulating collar 41 on which the connecting ring 222 is sleeved is recessed to define a cavity 222b with the insulating ring 221. The cavity 222b communicates with the third flow gap 222a. The electrolyte in the cavity 222b can enter the second flow gap 20b along the third flow gap 222a and flow to the first flow gap 42a along the second flow gap 20b, so that the electrolyte in the cavity 222b outside the cover body 10 can reach the inside of the cover body 10 through the second flow gap 20b, thereby preventing an electrolytic cell from being formed outside the cover body 10 and facilitating the improvement of the shell pressure yield of the battery.

[0092] Specifically, when the insulating ring 221, the connecting ring 222 and the terminal post 30 are installed on the cover body 10 together, the electrolyte overflowing from the battery can be stored in the cavity 222b to prevent the electrolyte from leaking and affecting the environment. After the insulating ring 221, the connecting ring 222 and the terminal post 30 are installed, under the action of gravity, the electrolyte in the cavity 222b can enter the second flow gap 20b along the third flow gap 222a and flow to the first flow gap 42a along the second flow gap 20b, so that the electrolyte in the cavity 222b outside the cover body 10 can reach the inside of the cover body 10 through the second flow gap 20b.

[0093] In some embodiments, as Figure 5 shown, the distance between the surface of the insulating ring 221 facing the cavity 222b and the bottom wall of the installation groove 21b is d1. In the thickness direction of the cover body 10, the size of the insulating member 40 is d2, and it satisfies: d2 > d1, where the insulating member 40 is clamped between the insulating ring 221 and the bottom wall of the installation groove 21b, so that d2 > d1. After the insulating member 40 is installed between the insulating ring 221 and the bottom wall of the installation groove 21b, the insulating member 40 is squeezed to ensure that the position of the insulating member 40 is limited at this time, preventing the insulating member 40 from shaking along the axis of the first installation channel 10a, so that the insulating member 40 can stably separate the terminal post 30 from the connecting ring 222, separate the terminal post 30 from the cover body 10, and separate the terminal post 30 from the insulating spacer 20, preventing the battery from leaking electricity.

[0094] In some examples, the insulating member 40 is a rubber member, so that the insulating member 40 has insulating properties and can be deformed.

[0095] In some examples, it satisfies: 0 < d2 - d1 ≤ 1 mm, so as to ensure that the position of the insulating member 40 is limited while avoiding excessive deformation of the insulating member 40 due to extrusion, and at the same time facilitating assembly.

[0096] Specifically, make d2 - d1 > 0, so as to limit the position of the insulating member 40 by using the insulating ring 221 and the insulating spacer 20, so that the insulating member 40 can separate the pole column 30 from the connecting ring 222, separate the pole column 30 from the cover body 10, and prevent the connecting ring 222, the cover body 10 from contacting the pole column 30, and avoid battery leakage.

[0097] Make d2 - d1 ≤ 1 mm, so that when the insulating member 40 is installed between the insulating ring 221 and the insulating spacer 20, the degree of extrusion of the insulating member 40 is not too large. On the one hand, it is convenient to reduce the assembly difficulty, and on the other hand, it can avoid excessive deformation of the insulating member 40 due to extrusion, which is convenient to improve the service life of the insulating member 40.

[0098] Among them, d2 - d1 can be 0.2 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm or 0.8 mm, and there is no excessive limitation here.

[0099] According to some specific embodiments of the present invention, as Figure 2 shown, a receiving groove 10b is formed on one side of the cover body 10, and a first installation channel 10a penetrating the cover body 10 in the thickness direction is opened on the bottom wall of the receiving groove 10b. At least part of the connecting ring 222 is received in the receiving groove 10b and connected to the bottom wall of the receiving groove 10b, so as to limit the position of the connecting ring 222 by using the receiving groove 10b, and further facilitate reducing the possibility of the connecting ring 222 shaking and shifting.

[0100] In some embodiments, the bottom wall of the connecting ring 222 is connected to the bottom wall of the receiving groove 10b, and the side wall of the connecting ring 222 abuts against the side wall of the receiving groove 10b to limit the position of the connecting ring 222 and prevent the connecting ring 222 from shaking in the axial and radial directions of the receiving groove 10b.

[0101] In some examples, the bottom wall of the connecting ring 222 and the bottom wall of the receiving groove 10b are connected together by laser welding. Among them, laser welding can not only connect two components together, but also seal the gap between the two components, and further can prevent the electrolyte from remaining in the gap between the two components, so that the electrolyte can smoothly pass through the second flow gap 20b to reach the inside of the cover body 10.

[0102] According to some alternative embodiments of the present utility model, as Figure 3 , Figure 4 shown, part of the insulating member 40 is disposed in the through hole 21a. On the one hand, the position of the insulating member 40 can be defined by the wall surface of the through hole 21a. On the other hand, the insulating member 40 can separate the inner wall of the through hole 21a and the pole column 30, thereby avoiding the contact between the pole column 30 and the insulating spacer 20 and preventing leakage.

[0103] According to some specific embodiments of the present utility model, as Figure 3 , Figure 5 shown, the through hole 21a and the mounting groove 21b are aligned and communicated in the thickness direction. The insulating member 40 is disposed at the end of the through hole 21a and is adapted to abut against the bottom wall of the mounting groove 21b to define the position of the insulating member 40 in the axial direction of the through hole 21a and prevent the insulating member 40 from moving axially along the through hole 21a.

[0104] As Figure 4 shown, in this embodiment, the insulating member 40 is sleeved on the outer periphery of the pole column 30. One end of the insulating member 40 abuts against the insulating ring 221, and the other end abuts against the bottom wall of the mounting groove 21b to fully define the position of the insulating member 40 and prevent the insulating member 40 from shaking axially along the first mounting channel 10a, so that the insulating member 40 can stably separate the pole column 30 from the connection ring 222, separate the pole column 30 from the cover body 10, and separate the pole column 30 from the insulating spacer, thus preventing battery leakage.

[0105] Next, the battery according to the present utility model will be briefly described.

[0106] The battery according to the present utility model is provided with the cover plate assembly 1 of the above embodiment.

[0107] For the battery according to the present utility model, the second flow gap 20b is used to communicate the first flow gap 42a with the outside in the thickness direction of the cover body 10, so that the electrolyte located outside the cover body 10 can flow into the first flow gap 42a through the second flow gap 20b, and the electrolyte is stored in the second flow gap 20b and the first flow gap 42a, thereby reducing the possibility of forming an electrolytic cell outside the cover body 10 and improving the shell pressure yield of the battery.

[0108] Next, the battery pack according to the present utility model will be briefly described.

[0109] The battery pack according to the present utility model is provided with the battery of the above embodiment.

[0110] According to the battery pack of the present utility model, by using the second flow gap 20b to communicate the first flow gap 42a with the outside in the thickness direction of the cover body 10, the electrolyte located outside the cover body 10 can flow through the second flow gap 20b to the first flow gap 42a, so that the electrolyte is stored in the second flow gap 20b and the first flow gap 42a, thereby reducing the possibility of forming an electrolytic cell outside the cover body 10 and improving the shell pressure yield of the battery.

[0111] The electrical equipment according to the present utility model will be briefly described below.

[0112] The electrical equipment according to the present utility model is provided with the battery pack or battery of the above embodiment.

[0113] According to the electrical equipment of the present utility model, by using the second flow gap 20b to communicate the first flow gap 42a with the outside in the thickness direction of the cover body 10, the electrolyte located outside the cover body 10 can flow through the second flow gap 20b to the first flow gap 42a, so that the electrolyte is stored in the second flow gap 20b and the first flow gap 42a, thereby reducing the possibility of forming an electrolytic cell outside the cover body 10, improving the shell pressure yield of the battery, and improving the use safety of the electrical equipment.

[0114] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0115] Although the embodiments of the present utility model have been shown and described above, changes, modifications, substitutions, and variations can be made to the above embodiments.

Claims

1. A cover plate assembly (1) for a battery, characterized in that, Comprising: A cover plate body (10), on which a first installation channel (10a) is provided, and one surface on the thickness direction side of the cover plate body (10) is a first surface (11); An insulating spacer (20), which is arranged on the first surface (11). The surface of the insulating spacer (20) facing the first surface (11) is a second surface (21), and a communication groove (21c) is also provided on the second surface (21). At least part of the bottom wall of the communication groove (21c) is spaced from the first surface (11) to form a first flow gap (42a); An insulating member (40), which is arranged in the first installation channel (10a). The insulating member (40) is spaced from the inner wall of the first installation channel (10a) to form a second flow gap (20b). The second flow gap (20b) communicates the first flow gap (42a) with the other side in the thickness direction of the cover plate body (10).

2. The cover plate assembly (1) for a battery according to claim 1, characterized in that, A first gap (11a) is formed between the second surface (21) and the first surface (11), and the first flow gap (42a) communicates with the first gap (11a).

3. The cover plate assembly (1) for a battery according to claim 1 or 2, characterized in that, At least part of the bottom wall of the communication groove (21c) is also provided with a through hole (21a), and the through hole (21a) is opposite to the first installation channel (10a); The cover plate assembly (1) further comprises: A pole column (30), which passes through the through hole (21a) and is arranged in the first installation channel (10a). The insulating member (40) is sleeved on the outer surface of the pole column (30) and is adapted to space the outer surface of the pole column (30) from the inner wall of the first installation channel (10a).

4. The cover plate assembly (1) for a battery according to claim 3, characterized in that, A second gap (30a) is formed between at least part of the outer surface of the pole column (30) and the inner wall surface of the through hole (21a), and the first flow gap (42a) communicates with the second gap (30a).

5. The cover plate assembly (1) for a battery according to claim 4, characterized in that, The bottom wall of the communication groove (21c) is provided with a mounting groove (21b), and the through hole (21a) is provided on the bottom wall of the mounting groove (21b); One end of the insulating member (40) forms a stop portion (42), the stop portion (42) is received in the mounting groove (21b), and one surface on the thickness direction side of the stop portion (42) is spaced from the first surface (11) to form at least part of the first flow gap (42a).

6. The cover plate assembly (1) for a battery according to claim 5, characterized in that, The insulating member (40) includes: An insulating sleeve (41), which is configured in a ring shape. The insulating sleeve (41) is arranged in the first installation channel (10a) and forms the second flow gap (20b) with the inner wall of the first installation channel (10a). One end of the insulating sleeve (41) is located on one side in the thickness direction of the cover plate body (10), and the other end of the insulating sleeve (41) extends to the other side in the thickness direction of the cover plate body (10); wherein The stop portion (42) is located at one end of the insulating ferrule (41) and protrudes from the outer peripheral surface of the insulating ferrule (41), and at least a part of the stop portion (42) is disposed opposite to and spaced apart from the first surface (11) in the thickness direction.

7. The cover plate assembly (1) for a battery according to claim 6, characterized in that, In the thickness direction of the cover body (10), the maximum distance between the bottom wall of the mounting groove (21b) and the first surface (11) is d3, the thickness of the stop portion (42) is d4, and it satisfies: d3 > d4.

8. The cover plate assembly (1) for a battery according to claim 7, characterized in that, It satisfies: 0.1mm ≤ d3 - d4 ≤ 1mm.

9. The cover plate assembly (1) for a battery according to claim 6, characterized in that, The insulating ferrule (41) and the stop portion (42) are integrally formed.

10. The cover plate assembly (1) for a battery according to claim 6, characterized in that, It further includes: An insulating ring (221), the insulating ring (221) is located on the other side in the thickness direction of the cover body (10), and the insulating ring (221) is sleeved on the outer peripheral surface of the pole column (30); A connecting ring (222), the connecting ring (222) is located between the insulating ring (221) and the cover body (10) and is sleeved on the outer peripheral surface of the pole column (30), one side of the connecting ring (222) in the thickness direction is connected to the insulating ring (221), and the other side of the connecting ring (222) in the thickness direction is connected to the cover body (10); wherein The connecting ring (222) is spaced apart from the outer peripheral surface of the pole column (30), the insulating ferrule (41) is located between the connecting ring (222) and the outer peripheral surface of the pole column (30), and the insulating ferrule (41) is spaced apart from the connecting ring (222) to define a third flow gap (222a), and the third flow gap (222a) communicates with the second flow gap (20b).

11. The cover plate assembly (1) for a battery according to claim 10, characterized in that, The connecting ring (222) is sleeved on at least a part of the surface of the insulating ferrule (41) and is recessed to define a cavity (222b) with the insulating ring (221), and the cavity (222b) communicates with the third flow gap (222a).

12. The cover plate assembly (1) for a battery according to claim 11, characterized in that, The distance between the surface of the insulating ring (221) facing the cavity (222b) and the bottom wall of the mounting groove (21b) is d1, in the thickness direction of the cover body (10), the size of the insulating ferrule (41) is d2, and it satisfies: d2 > d1.

13. The cover plate assembly (1) for a battery according to claim 12, characterized in that, It satisfies: 0 < d2 - d1 ≤ 1mm.

14. A battery, characterized in that, It includes the cover plate assembly (1) for a battery according to any one of claims 1 - 13.

15. A battery pack, characterized in that, It includes the battery according to claim 14.

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

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