Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment, and relates to the technical field of batteries. The battery comprises a shell, a battery cell, a pole and an insulating coating, the shell is provided with a containing cavity, and the battery cell is arranged in the containing cavity; the shell is provided with a through hole, and the pole is mounted in the through hole; the insulating coating is at least partially sprayed on the inner surface of the shell and at least partially covers the inner wall of the accommodating cavity; the through holes are located in the shell wall, where the insulating coating is sprayed, of the shell, so that the insulating coating is sprayed on the inner wall of the shell to form the insulating layer, independent injection molding is not needed, independent positioning and assembling procedures are not needed, the production and manufacturing cost is reduced, the thickness of the insulating coating formed in the spraying mode can be adjusted and controlled, and the production efficiency is improved. Therefore, the pole and the shell have a good insulation effect, the thickness of the insulation coating is reduced, and the capacity of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] Batteries are widely used in various power supply devices, including consumer electronics, new energy vehicles, and energy storage devices. Batteries have different sizes and structures depending on the application scenario, and the battery shell can be made of different materials.

[0003] In the related art, a battery cell is arranged inside a battery shell, and a mounting hole is opened on the shell. The mounting hole is used to install a pole, and the pole is electrically connected to the battery cell. Since the shell is made of metal, when installing the pole, it is necessary to install a lower plastic part and an upper plastic part at corresponding positions on the inner and outer surfaces of the shell respectively to insulate the pole from the shell.

[0004] However, currently the lower plastic part on the battery housing needs to be separately injection molded, which requires a separate assembly process and installation positioning, which is costly. In addition, the lower plastic part is thick and occupies a large space, resulting in a reduction in the capacity of the battery cells in the battery. Utility Model Content

[0005] In view of the above problems, the embodiments of the present application provide a battery and an electrical device to solve the technical problems that the lower plastic part on the current battery casing needs to be separately injection molded, requires a separate assembly process and installation positioning, is costly, and the lower plastic part is thick and occupies a large space, resulting in a reduction in the capacity of the battery cells in the battery.

[0006] In order to achieve the above-mentioned purpose, the present application provides a battery, which includes a shell, a battery cell, a pole and an insulating coating, the shell has a accommodating cavity, and the battery cell is arranged in the accommodating cavity; the shell has a through hole, and the pole is installed in the through hole; the insulating coating is at least partially arranged on the inner surface of the shell and at least partially covers the inner wall of the accommodating cavity; the through hole is located in the shell wall of the shell where the insulating coating is arranged.

[0007] The battery provided in the embodiment of the present application forms an insulating layer by at least partially setting the insulating coating on the inner wall of the shell, which does not require separate injection molding and does not require separate positioning and assembly processes, thereby reducing production costs. The thickness of the insulating coating formed by spraying can be adjusted and controlled, so that the pole and the shell have good insulation effect while reducing the thickness of the insulating coating and improving the capacity of the battery.

[0008] As an optional implementation, the ratio of the thickness of the insulating coating to the thickness of the shell is greater than or equal to 1 / 40 and less than or equal to 2.

[0009] As an optional implementation manner, the thickness of the insulating coating layer may be greater than or equal to 50 μm and less than or equal to 700 μm.

[0010] As an optional implementation, the roughness Ra of the surface of the insulating coating may be greater than or equal to 0.1 μm and less than or equal to 100 μm.

[0011] As an optional embodiment, the bonding strength between the insulating coating and the inner surface of the shell may be greater than or equal to 7 MPa and less than or equal to 20 MPa; and / or the shear strength between the insulating coating and the inner surface of the shell may be greater than or equal to 1 MPa and less than or equal to 50 MPa.

[0012] As an optional embodiment, the insulating coating has insulation resistance. The insulation resistance of the insulating coating is positively correlated with its breakdown voltage; the breakdown voltage of direct current is greater than or equal to 500V, and / or the breakdown voltage of alternating current is greater than or equal to 500V.

[0013] As an optional implementation, a side of the insulating coating facing away from the inner surface of the shell may be provided with a reinforcing rib, and the reinforcing rib protrudes toward the inside of the accommodating cavity.

[0014] As an optional embodiment, the shell has a liquid injection hole, and at least part of the reinforcing ribs are arranged around the liquid injection hole; and / or, the shell has an explosion-proof valve hole, and at least part of the reinforcing ribs are arranged around the explosion-proof valve hole; and / or, at least part of the reinforcing ribs are arranged around the through hole. Alternatively, the shell hole can be hollowed out.

[0015] As an optional embodiment, the shell may include a main body and a top cover, wherein the top cover is sealed and connected to the main body and encloses a receiving cavity; and the insulating coating covers a surface of at least one of the top cover and the main body facing the receiving cavity.

[0016] As an optional implementation, there is an accommodation gap between the shell wall provided with the insulating coating and the pole, and a sealing member is provided in the accommodation gap.

[0017] As an optional embodiment, the shell wall of the shell is provided with an insulating coating and a sinker is provided, and the sinker is arranged around the through hole; the pole may include a column and a connecting part, the column is passed through the through hole, and the connecting part is connected to one end of the column facing the inside of the accommodating cavity; the area of ​​the insulating coating opposite to the sinker abuts against the connecting part.

[0018] As an optional embodiment, the pole may include a column and a connecting portion, the column is passed through the through hole, the connecting portion is connected to one end of the column facing the inside of the accommodating cavity, and a boss is provided on the upper surface of the connecting portion, which abuts against the insulating coating.

[0019] As an optional implementation, the battery may further include a seal, which may be sleeved on the outer side of the column; there is a gap between the sink and the column, and the seal may be located in the gap.

[0020] As an optional embodiment, the battery may further include an upper plastic and a pressure ring, wherein the upper plastic is located on the outside of the shell and is arranged around the through hole; the pressure ring abuts against a surface of the upper plastic facing away from the shell and is connected to the column.

[0021] As an optional embodiment, the shape of the shell can be any one of a cylinder and a square.

[0022] The present application provides an electrical device, comprising a battery in any one of the above technical solutions.

[0023] The present application provides a battery and an electrical device, wherein the battery comprises a shell, a battery cell, a pole and an insulating coating, wherein the shell has a accommodating cavity, in which the battery cell is arranged; the shell has a through hole, in which the pole is installed; the insulating coating is at least partially arranged on the inner surface of the shell and at least partially covers the inner wall of the accommodating cavity; the through hole is located on the shell wall where the insulating coating is arranged, so that the insulating coating is arranged on the inner wall of the shell to form an insulating layer, without the need for separate injection molding, and without the need for separate positioning and assembly processes, thereby reducing the production cost, and the thickness of the insulating coating formed by spraying can be adjusted and controlled, so that the pole and the shell have a good insulation effect while reducing the thickness of the insulating coating and improving the capacity of the battery.

[0024] In addition to the technical problems solved by the present application, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the batteries and electrical equipment provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 An exploded view of a battery provided in an embodiment of the present application;

[0027] Figure 2 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 1 ;

[0028] Figure 3 for Figure 2 A partial view of the position in the middle;

[0029] Figure 4 A schematic diagram of the structure of an insulating coating in a battery provided in an embodiment of the present application;

[0030] Figure 5 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 2 ;

[0031] Figure 6 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 3 ;

[0032] Figure 7 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 4 ;

[0033] Figure 8 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 5 ;

[0034] Fig. 9 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 6 .

[0035] Description of reference numerals:

[0036] 10-Battery;

[0037] 100-shell; 101-accommodating cavity; 102-through hole; 103-liquid injection hole; 110-main body; 120-top cover; 121-sinking platform; 122-cushion;

[0038] 200-pole; 210-column; 220-connecting part;

[0039] 300-insulation coating; 310-reinforcement ribs;

[0040] 400-seal;

[0041] 500-Plasticizing;

[0042] 600-Compression ring. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] Batteries are widely used in various power supply devices, including consumer electronics, new energy vehicles, and energy storage devices. Batteries have different sizes and structures depending on the application scenario, and the battery shell can be made of different materials. At present, the battery shell is equipped with a cell inside, and a mounting hole is opened on the shell. The mounting hole is used to install the pole, and the pole is electrically connected to the cell. Since the shell is made of metal, when installing the pole, it is necessary to install the lower plastic part and the upper plastic part at the corresponding positions on the inner and outer surfaces of the shell to insulate the pole from the shell.

[0045] However, the lower plastic part on the battery shell currently needs to be separately injection molded, which requires a separate assembly process and installation positioning, which is costly, and the lower plastic part is thick and occupies a large space, resulting in a reduction in the capacity of the battery cell. In addition, the lower plastic part is connected to the shell by hot melting, and the overflowing material of the lower plastic part is easy to clog and affect the bursting pressure of the explosion-proof valve, causing safety hazards. In addition, the material of the currently injection-molded lower plastic part is easy to produce electrochemical reactions with composite materials such as copper and aluminum. The material of the lower plastic part and the composite material itself constitute a primary battery, which affects the performance of the battery.

[0046] The present application provides a battery and an electrical device, which forms an insulating layer by setting an insulating coating on the inner wall of a shell, without the need for separate injection molding or a separate assembly process, thereby reducing the production cost, and the thickness of the insulating coating formed by spraying can be adjusted and controlled, so that the pole and the shell have a good insulation effect, while reducing the thickness of the insulating coating and increasing the capacity of the battery. In addition, the spraying of the insulating coating has higher precision, and no subsequent separate process is required for positioning and fixing, which avoids the impact on the explosion-proof valve due to hot melting, and ensures that the battery has good safety.

[0047] The battery of the embodiment of the present application is described below in conjunction with the accompanying drawings. It should be noted that the battery provided in the embodiment of the present application can be a secondary battery, that is, the battery in the embodiment of the present application can be charged and discharged and recycled, and the specific type of the battery can include but is not limited to lithium batteries, lithium cobalt oxide batteries, lithium iron phosphate batteries, ternary batteries, etc., and the battery and the scene in which the battery can be used include but are not limited to electronic products, communication equipment, transportation, etc., such as mobile phones, computers, new energy vehicles and other products, and the embodiment of the present application does not specifically limit this.

[0048] Figure 1 An exploded view of a battery provided in an embodiment of the present application, Figure 2 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 1 , Figure 3 for Figure 2 A partial view of the position in the middle. Figure 4A schematic diagram of the structure of the insulating coating in the battery provided in the embodiment of the present application.

[0049] Please refer to Figures 1 to 4 The embodiment of the present application is a battery 10, which includes a shell 100, a battery cell, a pole 200 and an insulating coating 300. The shell 100 has a receiving cavity 101, and the battery cell is arranged in the receiving cavity 101. The shell 100 has a through hole 102, and the pole 200 is installed in the through hole 102. The insulating coating 300 is at least partially arranged on the inner surface of the shell 100 and at least partially covers the inner wall of the receiving cavity 101. The through hole 102 is located on the shell wall of the shell 100 where the insulating coating 300 is arranged.

[0050] Among them, the through hole 102 is the mounting hole of the pole 200, and the insulating coating 300 is arranged on the inner surface of the shell 100, and an insulating layer can be formed on the inner surface of the shell 100. Since the through hole 102 for setting the pole 200 is located on the shell wall of the shell 100 where the insulating coating 300 is set, the peripheral area of ​​the through hole 102 is covered by the insulating coating 300, and the insulating coating 300 can play an insulating isolation role between the shell 100 and the pole 200.

[0051] It can be understood that the insulating coating 300 is arranged as a whole on the inner surface of the shell 100, and the spraying pattern, single spraying thickness, number of spraying and curing method after spraying can be controlled by a preset spraying process, so as to ensure that the insulating coating 300 and the shell 100 form an integrated structure, and the insulating coating 300 can be adhered to the inner surface of the shell 100.

[0052] In addition, for the through hole 102 and other areas where space needs to be reserved, the spray-coated insulating coating 300 can be partially hollowed out and the boundary area of ​​the spraying can be accurately controlled.

[0053] It should be noted that in the battery 10 provided in the embodiment of the present application, an insulating layer is formed by spraying the insulating coating 300 on the inner wall of the shell 100, without the need for separate injection molding, and without the need for separate positioning and assembly processes, thereby reducing the production cost, and the thickness of the insulating coating 300 formed by spraying can be adjusted and controlled, so that the pole 200 and the shell 100 have a good insulation effect, while reducing the thickness of the insulating coating 300 and improving the capacity of the battery 10.

[0054] First, the specific dimensions and parameter values ​​of the insulating coating 300 are described in detail below.

[0055] Please continue to refer to Figures 1 to 4 In some embodiments, the ratio of the thickness of the insulating coating to the thickness of the shell can be greater than or equal to 1 / 40 and less than or equal to 2.

[0056] It is understandable that if the thickness of the insulating coating 300 is too large, the seal on the shell 100 may not be able to seal to the gap between the top cover of the shell 100 and the insulating coating 300 after the seal is squeezed, resulting in poor sealing of the battery. At the same time, excessive thickness increases costs and reduces battery energy density. If the thickness of the insulating coating 300 is too thin, the extrusion force generated by the seal on the shell 100 being squeezed by the pole 200 and the shell 100 may cause the insulating coating 300 to crack, and the electrolyte flows out from the cracked gap. In this application, the thickness of the insulating coating 300 is controlled within a reasonable range, which can ensure good sealing while ensuring that the insulating coating 300 has sufficient strength to avoid cracking.

[0057] In some embodiments, the thickness of the insulating coating 300 may be greater than or equal to 50 μm and less than or equal to 700 μm.

[0058] It is understandable that the insulating coating 300 is attached to the inner surface of the shell 100 by spraying, and the local thickness can be precisely controlled as required to avoid scratches, so that the insulating coating 300 meets the mechanical, electrical and corrosion protection requirements.

[0059] Exemplarily, the thickness of the insulating coating 300 is d, and the specific value of d can be 50 μm, 51 μm, 80 μm, 100 μm, 200 μm, 500 μm, 699 μm, 700 μm, etc., which is not specifically limited in the embodiments of the present application.

[0060] As an optional implementation, the roughness Ra of the surface of the insulating coating 300 may be greater than or equal to 0.1 μm and less than or equal to 100 μm.

[0061] It is understandable that the surface roughness of the insulating coating 300 can be improved by chemical corrosion, mechanical friction, laser cleaning or stamping. In this way, the consistency of the surface state of the insulating coating 300 can be improved by surface roughness treatment, so that the surface of the insulating coating 300 has stronger adhesion after spraying.

[0062] For example, the surface treatment can be performed by using a cleaning agent to remove pollutants such as oil, lubricant, etc. on the surface of the housing 100, by using corona treatment, laser radiation, plasma activation, etc. to achieve surface modification, by controlling the temperature and humidity environment of the spraying process, or by spraying a surface treatment agent to polarize the surface of the substrate, so that the dyne value of the surface of the sprayed object is greater than 30.

[0063] For example, the specific value of the roughness Ra of the surface of the insulating coating 300 can be 0.1 μm, 0.2 μm, 1 μm, 10 μm, 11 μm, 20 μm, 50 μm, 80 μm, 99 μm, etc., which is not specifically limited in the embodiments of the present application.

[0064] It should be noted that in the battery 10 provided in the embodiment of the present application, the insulating coating 300 can be sprayed by a single spraying or by multiple sprayings. According to the different thickness requirements of different regions, different corresponding regions of the insulating coating 300 can be sprayed different times during spraying, and the embodiment of the present application does not specifically limit this.

[0065] As an optional implementation, the bonding strength between the insulating coating 300 and the inner surface of the housing 100 may be greater than or equal to 7 MPa and less than or equal to 20 MPa.

[0066] For example, the specific value of the bonding strength between the insulating coating 300 and the inner surface of the shell 100 can be 7 MPa, 8 MPa, 10 MPa, 15 MPa, 19 MPa, 20 MPa, etc., which is not specifically limited in the embodiments of the present application.

[0067] In some embodiments, the shear strength between the insulating coating 300 and the inner surface of the housing 100 may be greater than or equal to 1 MPa and less than or equal to 50 MPa.

[0068] For example, the specific value of the shear strength between the insulating coating 300 and the inner surface of the shell 100 can be 1 MPa, 2 MPa, 10 MPa, 15 MPa, 20 MPa, 40 MPa, 49 MPa, 50 MPa, etc., which is not specifically limited in the embodiments of the present application.

[0069] In some embodiments, fluorescent particles may be added to the insulating coating 300 to facilitate detection of whether the area covered by the spraying of the insulating coating 300 meets the preset requirements after spraying, so as to avoid the occurrence of leakage or pores. In addition, the insulating coating 300 has excellent insulation resistance. The breakdown voltage is positively correlated with the insulation resistance of the insulating coating 300. The breakdown voltage time is controlled to be between 1s-2min, exemplarily 60s, and the DC breakdown voltage is greater than or equal to 500V. The AC breakdown voltage is greater than or equal to 500V.

[0070] In the embodiment of the present application, the spray-on insulating coating 300 can be prepared by mixing materials such as oligomers, active monomers, photoinitiators, adhesion promoters, and fillers according to a certain ratio.

[0071] Exemplarily, the oligomer may be, but not limited to, polyester acrylate, epoxy resin, etc.; the active monomer may be, but not limited to, alkyl acrylate, bis(3,4-epoxycyclohexyl) adipate, etc.; the adhesion promoter may be, but not limited to, silane coupling agent; the filler may be, but not limited to, mica.

[0072] As an optional implementation, a reinforcing rib 310 may be provided on a side of the insulating coating 300 facing away from the inner surface of the housing 100 , and the reinforcing rib 310 protrudes toward the inside of the accommodating cavity 101 .

[0073] Exemplarily, local reinforcement can be performed at the through hole 102 where the pole 200 is installed, and reinforcing ribs 310 are set. After the insulating coating 300 is sprayed to form, the pole 200 and other components are installed. The reinforcing ribs 310 can be set horizontally, vertically, or in an "X" shape, a tic-tac-toe shape, etc. The embodiments of the present application do not make specific limitations on this.

[0074] Figure 5 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 2 .

[0075] Please refer to Figure 5 As an optional implementation, the shell 100 has a liquid injection hole 103, and at least part of the reinforcing ribs 310 are arranged around the liquid injection hole 103.

[0076] It should be noted that the housing 100 has an explosion-proof valve hole, and at least part of the reinforcing ribs 310 are arranged around the explosion-proof valve hole. At least part of the reinforcing ribs 310 are arranged around the through hole 102. In this way, the explosion-proof valve can be prevented from being blocked. Alternatively, the explosion-proof valve hole, the through hole 102, etc. on the housing 100 can be hollowed out.

[0077] Figure 6 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 3 , Figure 7 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 4 , Figure 8 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 5 , Fig. 9 A partial cross-sectional view of a battery provided in an embodiment of the present application Figure 6 .

[0078] Please refer to Figure 6 and Figure 7 In some embodiments, the insulating coating 300 may be disposed on the inner wall of the housing 100, and the inner surface of the housing 100 may be sprayed before the housing assembly is assembled. The area of ​​the insulating coating 300 opposite to the through hole for mounting the pole 200 may be hollowed out, and the inner edge of the hollowed-out area of ​​the insulating coating 300 may extend above the connection portion of the pole 200, and a partial area is left so that at least part of the upper and lower surfaces of the seal 400 are closely attached to the pole 200 by the housing 100. Alternatively, after the housing assembly is assembled, the inner surface of the housing 100 is sprayed, and the inner edge of the hollowed-out area of ​​the insulating coating 300 may extend to the edge of the connection portion of the pole 200 to be aligned, or not aligned, and the spray coating does not cover the lower surface of the pole 200.

[0079] Please refer to Figure 8 and Fig. 9 As an optional embodiment, the housing 100 may include a main body 110 and a top cover 120, wherein the top cover 120 is sealed and connected to the main body 110 and surrounds the accommodating cavity 101; the insulating coating 300 covers the surface of at least one of the top cover 120 and the main body 110 facing the accommodating cavity 101. The specific spraying steps and spraying methods of the insulating coating 300 are as described in the above solution and will not be repeated here.

[0080] The main body 110 and the top cover 120 may be connected by welding or sealing to ensure good sealing performance.

[0081] It is understandable that the insulating coating 300 is formed together when one of the top cover 120 or the main body 110 is manufactured. When the inner surface of the top cover 120 or the main body 110 is provided with a heat dissipation duct component, the insulating coating 300 can cover the surface of the heat dissipation duct component while spraying.

[0082] It should be noted that, in addition to being sprayed on the inner surface of the top cover 120 or the main body 110, the insulating coating 300 may also be partially sprayed and covered on the surface of the pole 200. Alternatively, the outer surface of the shell 100 may be partially or completely covered, or the plastic may be replaced by connecting the plastic with the insulating coating 300, or the plastic, the insulating coating 300 and the outer film may be connected and formed in one step by spraying.

[0083] Please continue to refer to Figures 1 to 4 There is an accommodation gap between the shell wall of the shell 100 provided with the insulating coating 300 and the pole 200, and a sealing member 400 is placed in the accommodation gap.

[0084] As an optional embodiment, the shell wall of the shell 100 is provided with an insulating coating 300 and is provided with a sink 121, and the sink 121 is arranged around the through hole 102; the pole 200 may include a column 210 and a connecting portion 220, the column 210 is passed through the through hole 102, and the connecting portion 220 is connected to one end of the column 210 facing the inside of the accommodating cavity 101; the area where the insulating coating 300 is opposite to the sink 121 abuts against the connecting portion 220, so that a relatively closed accommodating gap is formed between the shell wall of the shell 100 provided with the insulating coating 300 and the pole 200.

[0085] Alternatively, a boss is provided on the upper surface of the connection portion 220 of the pole 200 , and the top of the boss abuts against the insulating coating 300 , so that a relatively closed accommodation gap is formed between the shell wall of the housing 100 provided with the insulating coating 300 and the pole 200 .

[0086] In some embodiments, the sink 121 can be disposed on the inner side of the housing 100 along the axial direction of the housing 100, and there is a gap between the sink 121 and the connecting portion 220. The housing 100 and the column 210 have a gap in the radial direction of the housing 100. The battery further includes a pressure ring 600, and the housing 100 and the pressure ring 600 have a gap in the axial direction of the housing 100. The seal is located in at least one of the above gaps.

[0087] As an optional implementation, the housing may be cylindrical or square, which is not specifically limited in the present application.

[0088] For example, the housing 100 may be cylindrical, and the insulating coating 300 may be sprayed on the ground of the housing 100 and part of the side wall of the housing 100 .

[0089] In addition, the battery 10 may further include an upper plastic 500 and a pressure ring 600 . The upper plastic 500 is located on the outside of the shell 100 and is arranged around the through hole 102 . The pressure ring 600 abuts against a side surface of the upper plastic 500 facing away from the shell 100 , and the pressure ring 600 is connected to the column 210 .

[0090] In other implementations, the insulating coating 300 may be sprayed after the pole 200 and other components are installed, and when the insulating coating 300 is sprayed on the inner surface of the housing 100, the position corresponding to the through hole 102 is hollowed out. For example, the insulating coating 300 may also be sprayed on the side wall of the pole 200.

[0091] For example, the pressure ring 600 may be flatly welded to the upper surface of the column 210 of the pole 200 to prevent the seal 400 from being excessively compressed.

[0092] It should be noted that, in addition to using the sink 121 to reserve space for filling the seal 400 , it can also be connected to the shell 100 through a heat dissipation duct member, which protrudes into the accommodating cavity 101 to reserve space for filling the seal 400 .

[0093] Please refer to Figure 5 In the embodiment of the present application, the housing 100 may also be a square structure, the pole 200 passes through the upper plastic 500 and the pressure ring 600 in sequence, the pressure ring 600 may abut against the upper plastic 500, and the pressure ring 600 may be welded to the positioning boss on the top cover 120. Among them, the central axes of the pole 200, the upper plastic 500, the pressure ring 600, the top cover 120, the pole 200, the through hole 102, and the seal 400 may all coincide.

[0094] A cushion member 122 may be provided on the lower side of the top cover 120 , and the insulating coating 300 may cover the cushion member 122 during spraying.

[0095] In the embodiment of the present application, the roughness detection method of the insulating coating 300 can be a contact detection method or a non-contact detection method. The roughness value is estimated by visual inspection, comparison block detection, etc., and the test is performed with the corresponding sampling length and evaluation length according to the roughness test sampling length table. The number of samples is at least 5, and the arithmetic mean deviation Ra of the surface roughness profile of the sprayed object, the root mean square deviation Rq of the profile, and the maximum height Rz of the profile are measured respectively.

[0096] Table 1 shows the roughness sampling length for measuring the Ra value of non-periodic profile and curve-related parameters.

[0097] Table 1

[0098]

[0099]

[0100] Table 2 Roughness sampling lengths for measuring Rz values ​​of non-periodic profiles.

[0101] Table 2

[0102]

[0103] The embodiment of the present application provides a battery, which includes a shell 100, a battery cell, a pole 200 and an insulating coating 300. The shell 100 has a accommodating cavity 101, and the battery cell is arranged in the accommodating cavity 101; the shell 100 has a through hole 102, and the pole 200 is installed in the through hole 102; the insulating coating 300 is sprayed on the inner surface of the shell 100 and at least partially covers the inner wall of the accommodating cavity 101; the through hole 102 is located at the shell wall of the shell 100 where the insulating coating 300 is sprayed, so that the insulating coating 300 is sprayed on the inner wall of the shell 100 to form an insulating layer, without the need for separate injection molding, and without separate positioning and assembly processes, thereby reducing the production cost, and the thickness of the insulating coating 300 formed by spraying can be adjusted and controlled, so that the pole 200 and the shell 100 have a good insulation effect, while reducing the thickness of the insulating coating 300 and improving the capacity of the battery.

[0104] An embodiment of the present application also provides an electrical device, which includes the battery in any of the above technical solutions.

[0105] Among them, electrical equipment may include but is not limited to electronic products, communication equipment, transportation vehicles, etc., such as mobile phones, computers, new energy vehicles and other products, and the embodiments of the present application do not make specific limitations on this.

[0106] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0107] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0108] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein.

[0109] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: It includes a shell, a battery cell, a pole and an insulating coating, wherein the shell has a accommodating cavity, and the battery cell is arranged in the accommodating cavity; the shell has a through hole, and the pole is installed in the through hole; the insulating coating is at least partially located on the inner surface of the shell and at least partially covers the inner wall of the accommodating cavity; the through hole is located on the shell wall of the shell where the insulating coating is arranged.

2. The battery according to claim 1, characterized in that The ratio of the thickness of the insulating coating to the thickness of the shell is greater than or equal to 1 / 40 and less than or equal to 2.

3. The battery according to claim 1, characterized in that The value of the roughness Ra of the surface of the insulating coating is greater than or equal to 0.1 μm and less than or equal to 100 μm.

4. The battery according to claim 1, characterized in that The bonding strength between the insulating coating and the inner surface of the shell is greater than or equal to 7Mpa and less than or equal to 20Mpa; and / or the shear strength between the insulating coating and the inner surface of the shell is greater than or equal to 1Mpa and less than or equal to 50Mpa.

5. The battery according to claim 1, characterized in that The DC breakdown voltage of the insulating coating is greater than or equal to 500V, and / or the AC breakdown voltage of the insulating coating is greater than or equal to 500V.

6. The battery according to claim 1, characterized in that A reinforcing rib is provided on a side of the insulating coating away from the inner surface of the shell, and the reinforcing rib protrudes toward the inside of the accommodating cavity.

7. The battery according to claim 6, characterized in that The shell has a liquid injection hole, and at least part of the reinforcing ribs are arranged around the liquid injection hole; and / or, the shell has an explosion-proof valve hole, and at least part of the reinforcing ribs are arranged around the explosion-proof valve hole; and / or, at least part of the reinforcing ribs are arranged around the through hole.

8. The battery according to any one of claims 1 to 7, characterized in that: The shell comprises a main body and a top cover, wherein the top cover is sealedly connected to the main body and surrounds the accommodating cavity; the insulating coating covers a surface of at least one of the top cover and the main body facing the accommodating cavity.

9. The battery according to any one of claims 1 to 7, characterized in that: It also includes a sealing member, which is sleeved on the outer side of the pole; there is an accommodation gap between the shell wall of the shell provided with the insulating coating and the pole, and the sealing member is arranged in the accommodation gap.

10. The battery according to claim 9, characterized in that The shell wall of the shell provided with the insulating coating is provided with a sink, and the sink is arranged around the through hole; the pole includes a column and a connecting part, the column passes through the through hole, and the connecting part is connected to one end of the column facing the inside of the accommodating cavity; the area of ​​the insulating coating opposite to the sink abuts against the connecting part.

11. The battery according to claim 9, characterized in that The pole includes a column and a connecting portion, the column is passed through the through hole, the connecting portion is connected to one end of the column facing the inside of the accommodating cavity, a boss is provided on the upper surface of the connecting portion, and the boss abuts against the insulating coating.

12. The battery according to claim 11, characterized in that It also includes an upper plastic and a pressure ring. The upper plastic is located on the outside of the shell and is arranged around the through hole. The pressure ring abuts against a side surface of the upper plastic away from the shell, and the pressure ring is connected to the column.

13. The battery according to claim 9, characterized in that The shell is in a shape of a cylinder or a square.

14. An electrical device, characterized in that: A battery comprising any one of claims 1 to 13.

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