CN112886104A

CN112886104A - Battery and electric equipment

Info

Publication number: CN112886104A
Application number: CN202110186829.5A
Authority: CN
Inventors: 姚明高; 王永珍
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2021-02-10
Filing date: 2021-02-10
Publication date: 2021-06-01
Anticipated expiration: 2041-02-10
Also published as: CN112886104B

Abstract

The application discloses battery and consumer. The battery comprises a battery cell body, a circuit board and a first protection layer, wherein the battery cell body comprises a shell and an electrode assembly arranged in the shell, the battery cell body is provided with a lug, the lug is connected with the electrode assembly and extends out of the shell, the circuit board is electrically connected with the lug, the first protection layer is formed between the shell and the circuit board by a protective material through a coating process or a deposition process, the thickness of a protective material film is larger than or equal to 0.01um and smaller than or equal to 150um, and optionally, the thickness of the protective material film is larger than or equal to 5um and smaller than or equal. The battery packaging process can be simplified, the safety reliability and the heat dissipation performance are improved, and the battery capacity is favorably improved.

Description

Battery and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a battery and electric equipment.

Background

In order to ensure the safety of the battery, it is common in the battery packaging process to attach adhesive tape to a predetermined region of the case, for example, to attach adhesive tape to a deep pit of the battery, so as to prevent burrs on the circuit board from contacting and piercing the case, thereby preventing the electrolyte from leaking. However, the attaching process of the adhesive tape is complex, and is not favorable for heat dissipation, and the adhesive tape is easy to warp when environmental factors such as temperature and humidity change, and is poor in waterproof and moisture-proof performance, so that the safety and reliability are poor, particularly, the thickness of the adhesive tape is large, and for a battery with a fixed size, the size of the battery cell can be reduced, and the improvement of the battery capacity is not favorable.

Disclosure of Invention

In view of this, the present application provides a battery and an electric device, so as to solve the problems that the current battery packaging process is complex, the safety reliability and the heat dissipation performance are poor, and the battery capacity is not favorably improved.

The application provides a battery, including electric core body, circuit board and first protective layer. The battery cell body comprises a shell and an electrode assembly arranged in the shell, and is provided with a lug which is connected with the electrode assembly and extends out of the shell. The circuit board is electrically connected with the pole lugs. The first protection layer is formed between the shell and the circuit board through a coating process or a deposition process by a protection material, the thickness of the protection material formed film is greater than or equal to 0.01um and less than or equal to 150um, and optionally, the thickness of the protection material formed film is greater than or equal to 5um and less than or equal to 15 um.

Optionally, the housing includes a main body portion and a top sealing portion, the tab extends from the top sealing portion, the first protection layer is attached to a back surface of the top sealing portion, and the back surface is a surface of the top sealing portion facing away from the circuit board; further optionally, the first protection layer is further attached to a front surface of the top seal portion, where the front surface is a surface of the top seal portion facing the circuit board.

Optionally, the first protective layer attached to the side of the body portion is in a predetermined pattern, further optionally, the predetermined pattern comprises at least one of a well, S, W, U, Z.

Optionally, the first protective layer is further attached to the end face of the tip seal portion, which extends out of the tab.

Optionally, the first protective layer is further attached to the surface of the tab facing the housing, and/or other surfaces or end surfaces of the tab.

Optionally, the battery further comprises an injection molding body and a second protective layer, the injection molding body is arranged at one end of the battery core body, the tab is arranged at one end of the battery core body, the circuit board is arranged in the injection molding body, the external terminal of the circuit board extends out of the injection molding body, and the second protective layer is formed on the outer surface of the injection molding body through a coating process or a deposition process by using a protective material.

Optionally, the battery further includes a third protective layer formed of a protective material on the circuit board through a coating process or a deposition process.

Optionally, the battery further includes a fourth protective layer, the fourth protective layer is formed on the side and/or the tail of the battery cell body by a coating process or a deposition process using a protective material, and the tail is opposite to the end of the battery cell body provided with the tab.

Optionally, a fourth protective layer is also attached to the two large faces and/or to the contour lines connecting the two large faces and the two side faces and/or to the end portions of the contour lines.

Optionally, the battery further comprises a mark, a first protective layer, a second protective layer, a third protective layer, a fourth protective layer and a mark, wherein the mark is formed by a protective material through a coating process or a deposition process in one step or in multiple steps; optionally, the indicia are formed on one or both of the major faces.

Optionally, the coating process comprises at least one of glue spraying, ink printing, digital printing, ink pad printing and impregnation printing, and the deposition process comprises at least one of chemical vapor deposition, plasma enhanced chemical vapor deposition, physical vapor deposition and sputtering.

Optionally, the color of the protective material comprises a single color or multiple colors. Optionally, at least one of black, white, yellow, blue, green, and silver is included.

Optionally, the protective material comprises an acrylate substance, and further optionally, one or more of a UV curing initiator, a leveling agent, a defoaming agent, a wetting agent and a pigment.

Optionally, the acrylate species comprises one or more of a monofunctional acrylate, a difunctional acrylate, and a trifunctional acrylate.

Alternatively, the monofunctional acrylate comprises: one or two of ethyl acrylate, butyl acrylate, tetrahydrofuran acrylate, hydroxyethyl acrylate, isooctyl acrylate, isodecyl acrylate, 2-dodecyl acrylate, N-vinyl caprolactam, morpholine acrylate, 4- (N, N-dimethylamino) ethyl benzoate, tetrahydrofurfuryl acrylate and 5- (N, N-dimethylamino) ethyl benzoate.

Alternatively, the difunctional acrylate comprises: at least one of triethylene glycol dimethacrylate, 1, 9-nonanediol diacrylate, hexanediol diacrylate, 6- [ (4' -cyano-4-biphenyl) oxy ] hexyl methacrylate and 3-methyl-1, 5-pentanediol diacrylate.

Alternatively, the trifunctional acrylate comprises: trimethylolpropane triacrylate, and/or pentaerythritol triacrylate.

Optionally, the UV cure initiator comprises: 2-hydroxy-2-methyl-1-phenylpropanone, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-propanone, 2,4, 6-trimethylbenzoylphenylphosphonic acid ethyl ester, 2-dimethylamino-2-benzyl-1- [4- (4-morpholinyl) phenyl ] -1-butanone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-propanone, and at least one of 2, 4-dihydroxybenzophenone.

Optionally, the defoaming agent comprises: at least one of hydrophobic stearate, dimethyl polysiloxane, polypropylene glycol, polyether and polyether modified siloxane.

Optionally, the wetting agent comprises: at least one of oleic acid, stearic acid, palmitic acid, linoleic acid, palmitic acid.

Optionally, the leveling agent comprises: at least one of allyltrimethoxysilane, vinyltrimethoxysilane, allyltriethoxysilane, and vinyltriethoxysilane.

Optionally, the pigment comprises carbon black or organic dye toner and 1, 6-hexanediol diacrylate, and further optionally, the mass ratio of the carbon black or the organic dye toner is 0.1-3.9%, preferably 0.5%.

Optionally, the UV curing initiator accounts for 0.5-16% of the total mass of the monofunctional acrylate, the difunctional acrylate and the trifunctional acrylate.

In a second aspect, the present application provides an electrical device, comprising a load and the battery described in any one of the above, wherein the battery supplies power to the load.

In the battery and the electric equipment of the application, the first protection layer is formed between the shell and the circuit board, the contact of burrs on the circuit board and the puncture of the shell can be avoided, the protection of the battery core body is realized, the first protection layer is formed by a protection material through a coating process or a deposition process which is simple in process, the battery packaging process is favorably simplified, the protection material with good heat conductivity can enable the first protection layer to have good heat dissipation performance, in addition, the first protection layer formed by the coating process or the deposition process has good adhesion with the shell, the safety and reliability are high, particularly, the thickness of a protection material film (such as the first protection layer) is small, the preferable thickness is between 5um and 15um, and the improvement of the battery capacity is favorably realized.

Drawings

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present application;

fig. 2 is an exploded schematic view of the structure of the battery shown in fig. 1;

FIG. 3 is a schematic view of the battery shown in FIG. 1 with a logo;

fig. 4 is an exploded view of the structure of the battery shown in fig. 3;

fig. 5 is a partial structural view of the top seal of the battery shown in fig. 1;

FIG. 6 is a schematic structural diagram of a first passivation layer according to an embodiment of the present application;

FIG. 7 is a partial schematic view of one side of the cell shown in FIG. 1;

fig. 8 and 9 are schematic structural diagrams of a fourth protective layer according to an embodiment of the present application.

Detailed Description

In a particular scenario, the battery of the present application includes, but is not limited to, all kinds of primary, secondary, fuel, solar and capacitor (e.g., supercapacitor) batteries. The battery may preferably be a lithium secondary battery including, but not limited to, a lithium metal secondary battery, a lithium ion secondary battery, a lithium polymer secondary battery, and a lithium ion polymer secondary battery. The battery packaging method is not limited in the present application, and for example, the pouch battery is packaged by a pouch case such as an aluminum plastic film. The soft package battery has the advantages of good safety, light weight, large battery capacity, good cycle performance, small internal resistance, flexible design and the like, and is widely used. In the embodiment of the present application, the battery may preferably be a pouch battery. In the present application, the technical solution of the present application is described by taking a pouch battery as an example, but the application of the technical solution of the present application is not limited to the pouch battery.

In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the embodiments and the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments, and not all embodiments. Based on the embodiments in the present application, the following respective embodiments and technical features thereof may be combined with each other without conflict.

Referring to fig. 1 to 4, a battery 10 of the present embodiment includes a cell body 11, a circuit board 12, and a first protection layer 13.

The cell body 11 includes a case 111, an electrode assembly (not shown), and tabs 113. The electrode assembly is disposed in the case 111, the electrode assembly may be formed by winding or stacking a plurality of pole pieces, one ends of the tabs 113 respectively extend into the case 111 and are electrically connected to the pole pieces of the corresponding polarity, and the other ends of the tabs 113 respectively extend from one side of the case 111.

According to the design of the battery 10 with positive and negative polarities, the electrode tabs include a positive electrode tab (also called a cathode tab) and a negative electrode tab (also called an anode tab), and the tab 113 includes a negative electrode tab and a positive electrode tab. The negative electrode tab is electrically connected with the anode sheet, and the positive electrode tab is electrically connected with the cathode sheet. In some implementations, the tab is electrically connected to the current collector of the pole piece with corresponding polarity, for example, the current collector of the cathode plate is welded to the positive tab, and at least the welding area is covered by an insulation sheet, glue (Sealant), adhesive paper or a protection material, so as to prevent burrs in the welding area from piercing the casing 111 and insulate the tab 113 from the casing 111.

The circuit board 12 is electrically connected to the tab 113. The function of the circuit board 12 can be determined according to actual needs. For example, the Circuit board 12 is a PCM (Protection Circuit Module) board, and may be used to protect the battery 10 from over-discharge, over-charge, over-current, output short-Circuit, and the like. The cell body 11 may be electrically connected to a BMS (Battery management system) or an electric device through the circuit board 12.

The first protective layer 13 is formed between the casing 111 and the circuit board 12, so that the burr on the circuit board 12 can be prevented from contacting and piercing the casing 111, and the cell body 11 can be protected.

The first protection layer 13 is formed between the housing 111 and the circuit board 12 by a coating process or a deposition process, and compared with the adhesive tape attaching process, the structural complexity of the set area, for example, the surface flatness of the housing 11 in the set area, is not required to be considered, and the requirement on the operation precision is low, thereby being beneficial to simplifying the battery packaging process.

In one implementation, the coating process includes, but is not limited to: at least one process of glue spraying, ink printing, digital printing, ink pad printing and impregnation printing; deposition processes include, but are not limited to: chemical Vapor Deposition (CVD), Plasma Enhanced Chemical Vapor Deposition (PEVCD), Physical Vapor Deposition (PVD), and sputtering.

The first protective layer 13 formed by a coating process or a deposition process has good adhesion with the shell 111, is not easy to tilt due to environmental factors such as temperature and humidity, has good waterproof and moisture-proof properties and high safety and reliability, and the first protective layer 13 can also improve the structural strength of the shell 111 in the area where the first protective layer is arranged. In addition, the coating process or the deposition process can make the thickness of the film formed by the protective material smaller, and the thickness of the film formed by the protective material in this embodiment is between 0.01um and 150um, and preferably between 5um and 15um, so as to form the first protective layer 13 with a thinner thickness, avoid occupying the size space of the cell body 11, and contribute to improving the battery capacity.

As for the protection material with good thermal conductivity, the first protection layer 13 has good heat dissipation performance, which is beneficial to heat dissipation of the battery 10 and reduces the risk of safety accidents caused by overheating.

The case 111 encloses a shape forming the cell body 11, and defines an outer appearance of the cell body 11. The internal components (e.g., the electrode assembly and the electrolyte) of the cell body 11 are disposed in the casing 111, and the components in the cell body 11 are protected by the casing 111, so as to ensure the protection effect and the safety of the cell body 11. In one implementation, referring to fig. 1 to 5, the housing 111 includes a top sealing portion 111a and a main body portion 111 b. The top seal part 111a may be regarded as a sealing part formed after the electrode assembly is subjected to a top sealing process, and the tab 113 protrudes from the top seal part 111 a.

The height of the top seal portion 111a is lower than that of the main body portion 111b in the thickness direction of the cell body 11, and the two portions form a step, and the circuit board 12 may be provided on the surface of the top seal portion 111a facing the main body portion 111b for space saving. Suitably, the first protective layer 13 is attached to the side of the main body portion 111b facing the overseal 111a, and in particular scenarios, the first protective layer 13 may cover all or part of the side of the main body portion 111b facing the overseal 111a and present a predetermined pattern, which in some implementations includes, but is not limited to, at least one of a well, S, W, U, Z.

Optionally, the first protection layer 13 is further attached to the top seal portion 111a, for example, the first protection layer 13 completely or partially covers the surface of the top seal portion 111a facing away from the circuit board 12 (i.e., the back surface of the top seal portion 111 a) and the surface facing the circuit board 12 (i.e., the front surface of the top seal portion 111 a), and the first protection layer 13 is not only disposed between the circuit board 12 and the housing 111, but also can extend to the back surface of the top seal portion 111a corresponding to the circuit board 12, so as to increase the coverage area of the first protection layer 13 and further reduce the risk that the circuit board 12 contacts and punctures the housing 111.

The casing 111 of the cell body 11 generally comprises an aluminum-plastic film, and from outside to inside, the aluminum-plastic film generally comprises an outer nylon layer, an adhesive, an intermediate aluminum foil, an adhesive and an inner heat-sealing layer. After the cell body 11 is packaged, on the end face of the top sealing portion 111a extending out of the tab 113, the aluminum-plastic film is cut to expose the middle layer aluminum foil, and in order to avoid short circuit danger, the first protection layer 13 may be further attached to the end face of the top sealing portion 111a extending out of the tab 113.

Optionally, as shown in fig. 6, the first protective layer 13 may also be attached to a surface of the tab 113 facing the housing 111, or cover two opposite surfaces of the tab 113, and/or other end surfaces of the tab 113, so as to improve the insulating performance between the tab 113 and other elements except the circuit board 12, avoid the risk of short circuit between the tab 113 and other elements, and also improve the waterproof and antioxidant performance of the tab 113.

Referring to fig. 1 to 4, the battery 10 further includes an injection molded body 14, and the injection molded body 14 may be formed by one-step molding (e.g., low-pressure injection molding), and is disposed at one end of the cell body 11, which is disposed at the tab 113, that is, at the head of the cell body 11. The circuit board 12 is disposed in the injection molded body 14, and the external terminal 121 of the circuit board 12 extends out of the injection molded body 14, so that the injection molded body 14 covers the top sealing part 111a of the housing 111, which not only protects the circuit board 12, but also reinforces the top sealing part 111a which is easy to be opened, and prevents the top sealing part from being opened.

With this structure, the battery 10 of the present embodiment may be provided with a second protective layer (not shown) formed of a protective material on the outer surface of the injection molded body 14 through a coating process or a deposition process. The second protective layer has a small thickness, and thus has little influence on the overall thickness of the battery 10, and can protect the injection molded body 14 and further reinforce the top seal portion 111 a.

In another embodiment, the battery 10 may not be provided with the injection molded body 14, but the protection of the circuit board 12 is directly provided by a protective layer (not shown). In distinction from the aforementioned first protective layer 13 and second protective layer, this protective layer is referred to as a third protective layer, which is formed on the circuit board 12 from a protective material by a coating process or a deposition process.

Referring to fig. 1 to 4, the cell body 11 further includes two opposite large surfaces 114, two side surfaces 115 connecting the two large surfaces 114, and outlines of the two side surfaces 115 connecting the two large surfaces 114. The battery 10 may further include a fourth protective layer 16, where the fourth protective layer 16 is formed by a coating process or a deposition process on the side surface 115 and the tail portion 116 of the cell body 11, and the contour line, and the tail portion 116 is opposite to the head portion of the cell body 11.

In other implementations, the fourth protective layer 16 may be disposed on only one side 115, or two sides 115, or one side 115 and the tail 116, or the tail 116 of the cell body 11.

It should be understood that the side surface 115 of the cell body 11 may have any shape conforming to the packaging process, for example, as shown in fig. 7, a side end of the cell body 11 is provided with an R corner, the side surface 115 includes a vertical surface 115a, a folded surface 115b perpendicular to the vertical surface 115a, an arc surface 115c connecting the folded surface 115b and the large surface 114, and the fourth protective layer 16 may include three portions connected in sequence, namely, a first portion 161, a second portion 162 and a third portion 163, which respectively cover the folded surface 115b, the arc surface 115c and a portion of the large surface 114. Of course, the fourth protective layer 16 may cover only one or a part of the vertical surface 115a, the folded surface 115b, and the arc surface 115 c.

The fourth protection layer 16 may not extend to be attached to the large surface 114, so that insulation in the set region, structural strength enhancement, waterproof performance improvement, and the like can be achieved, and increase in thickness of the cell body 11 can be avoided.

Of course, the fourth protective layer 16 may also extend and adhere to the large surface 114, and the fourth protective layer 16 has a large coverage area, a large protection area, and good adhesion to the cell body 11.

Similarly, in some implementations, at least one of the first protection layer 13, the second protection layer, and the third protection layer may also extend onto the respective adjacent large surface 114, or may completely cover the large surface 114. These protective layers can not only realize the insulating performance of the set region, but also improve the structural strength and the waterproof performance of the set region.

In some implementations, the fourth protective layer 16 may also cover the junction 115d of the side surface 115 and the top seal 111 a.

Referring to fig. 3 to 4, the battery further includes a mark 17 for showing the product model, performance parameters, and usage notes of the battery 10. The markings 17 may also be formed from a protective material on one or both of the large faces 114 by a coating process or a deposition process.

In the embodiment of the present application, the color of the protective material forming the mark 17 and the aforementioned protective layers may be a single color or multiple colors, and optionally, the color of the protective material includes but is not limited to: at least one of black, white, yellow, blue, green, and silver. Here, the color of the mark 17 and the color of each protective layer may be the same or different, so that more choices can be provided for the appearance of the battery 10, which is beneficial to improving the aesthetic appearance.

The examples herein do not limit the type of protective material, and in some scenarios, the protective material includes an acrylate species including, but not limited to, one or more of a monofunctional acrylate, a difunctional acrylate, and a trifunctional acrylate. Further optionally, one or more of a UV curing initiator, a leveling agent, a defoaming agent, a wetting agent and a pigment is also included. Herein, the protective material may be referred to as UV curable acrylate ink.

In some implementations, the viscosity of the UV curable acrylate ink may be 6 to 100mPa · S, including the following components by weight:

components	Mass fraction (%)
		Monofunctional acrylates	43～67
Difunctional acrylates	16～31
		Trifunctional acrylates	8～17
UV curing initiators	0.5～16
		Leveling agent	0.5～1.2
Defoaming agent	0.6～1.3
		Wetting agent	0.3～0.9
Pigment (I)	2.1～3.9

Alternatively, monofunctional acrylates include, but are not limited to: one or two of ethyl acrylate, butyl acrylate, tetrahydrofuran acrylate, hydroxyethyl acrylate, isooctyl acrylate, isodecyl acrylate, 2-dodecyl acrylate, N-vinyl caprolactam, morpholine acrylate, 4- (N, N-dimethylamino) ethyl benzoate, tetrahydrofurfuryl acrylate and 5- (N, N-dimethylamino) ethyl benzoate.

Difunctional acrylates include, but are not limited to: at least one of triethylene glycol dimethacrylate, 1, 9-nonanediol diacrylate, hexanediol diacrylate, 6- [ (4' -cyano-4-biphenyl) oxy ] hexyl methacrylate and 3-methyl-1, 5-pentanediol diacrylate.

Trifunctional acrylates include, but are not limited to: trimethylolpropane triacrylate, and/or pentaerythritol triacrylate.

In some scenarios, the UV curing initiator comprises 0.5-16% of the sum of the masses of the monofunctional acrylate, difunctional acrylate and trifunctional acrylate. UV cure initiators include, but are not limited to: 2-hydroxy-2-methyl-1-phenylpropanone, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-propanone, 2,4, 6-trimethylbenzoylphenylphosphonic acid ethyl ester, 2-dimethylamino-2-benzyl-1- [4- (4-morpholinyl) phenyl ] -1-butanone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-propanone, and at least one of 2, 4-dihydroxybenzophenone.

Defoamers include, but are not limited to: at least one of hydrophobic stearate, dimethyl polysiloxane, polypropylene glycol, polyether and polyether modified siloxane.

Wetting agents include, but are not limited to: at least one of oleic acid, stearic acid, palmitic acid, linoleic acid, palmitic acid.

Leveling agents include, but are not limited to: at least one of allyltrimethoxysilane, vinyltrimethoxysilane, allyltriethoxysilane, and vinyltriethoxysilane.

Pigments include, but are not limited to, carbon black or organic dye toners, and 1, 6-hexanediol diacrylate. Further alternatively, the mass ratio of the carbon black or the organic dye toner is 0.1 to 3.9%, preferably 0.5%. The pigment can be obtained by grinding through a planetary ball mill, in some scenes, the grinding revolution is 2000-3800, and the ball milling time is 3-11 hours.

It should be understood that the foregoing indicia 17 and the respective protective layers may be determined in order and number of steps according to the actual circumstances, such as the angle at which the manufacturing equipment can spray onto the battery 10. Each protective layer may be formed at one time or formed in steps, or all or part of a plurality of protective layers may be formed at one time. That is, the first protective layer 13, the second protective layer, the third protective layer, the fourth protective layer 16, and the mark 17 may be formed of a protective material through a coating process or a deposition process in one step or in steps.

In some implementations, in the embodiment of the present application, the incoming material of the cell body 11 may be detected first, tab cutting and shaping are performed on the incoming material of the cell body 11 that is qualified through detection, then the circuit board 12 is welded, and the tab 113 is bent to locate the circuit board 12 on the top sealing portion 111a of the cell body 11, then the injection molded body 14 shown in fig. 2 and 4 may be provided to apply head protection, then at least one of the foregoing identifier 17 and each protective layer is formed on the cell body 11, and finally, the battery 10 is obtained through appearance detection, function test, appearance and packaging of a finished product.

Another embodiment of the present application provides an electric device, which includes a load and the battery 10 of any of the above embodiments, wherein the load supplies power to the battery 10.

The powered device may be implemented in various specific forms, such as an unmanned aerial vehicle, an electric cleaning tool, an energy storage product, an electric vehicle, an electric bicycle, an electric navigation tool, and other electronic products. In a practical scenario, the electric devices specifically include, but are not limited to: notebook computers, pen-input computers, mobile computers, electronic book players, cellular phones, portable facsimile machines, portable copiers, portable printers, headphones, video recorders, liquid crystal televisions, portable cleaners, portable CD players, mini-discs, transceivers, electronic notebooks, calculators, memory cards, portable recorders, radios, backup power supplies, motors, automobiles, motorcycles, mopeds, bicycles, lighting fixtures, toys, game machines, clocks, electric tools, flashlights, cameras, large household batteries, lithium ion capacitors, and the like.

It will be appreciated by those skilled in the art that the configuration according to the embodiments of the present application can be applied to stationary type electric devices in addition to elements specifically used for mobile purposes.

Since the electric device has the battery 10 of any one of the foregoing embodiments, the electric device can produce the advantageous effects of the battery 10 of the corresponding embodiment.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent structural changes made by using the contents of the specification and the drawings are included in the scope of the present application.

It should be understood that in the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions and simplifying the description of the respective embodiments of the present application, and do not indicate or imply that a device or an element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.

Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element, and that elements, features, or elements having the same designation in different embodiments may or may not have the same meaning as that of the other elements, and that the particular meaning will be determined by its interpretation in the particular embodiment or by its context in further embodiments.

In addition, although the terms "first, second, third, etc. are used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well. The terms "or" and/or "are to be construed as inclusive or meaning any one or any combination. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

Claims

1. A battery, comprising:

the battery cell comprises a battery cell body and a battery cell, wherein the battery cell body comprises a shell and an electrode assembly arranged in the shell, and the battery cell body is provided with a lug which is connected with the electrode assembly and extends out of the shell;

the circuit board is electrically connected with the lug;

the protective layer, the protective layer passes through coating process or deposition process by protective material and forms in the casing with between the circuit board, the thickness that protective material formed the film is greater than or equal to 0.01um and is less than or equal to 150um, optionally, the thickness that protective material formed the film is greater than or equal to 5um and is less than or equal to 15 um.

2. The battery of claim 1, wherein the case includes a main body portion and a top seal portion, the tab protrudes from the top seal portion, the first protective layer is attached to a front surface of the top seal portion, the front surface being a surface of the top seal portion facing the circuit board; further optionally, the first protection layer is further attached to a back surface of the top seal portion, where the back surface is a surface of the top seal portion facing away from the circuit board.

3. The battery of claim 2, wherein the first protective layer attached to the side of the body portion is in a predetermined pattern, optionally the predetermined pattern comprises at least one of a well, S, W, U, Z.

4. The battery according to claim 2, wherein the first protective layer is further attached to the end face of the top seal portion protruding from the tab.

5. The battery according to claim 1, wherein the first protective layer is further attached to a surface of the tab facing the case and/or other surfaces or end surfaces of the tab.

6. The battery of claim 1, wherein the battery further comprises an injection molded body and a second protective layer, the injection molded body is disposed at one end of the tab of the cell body, the circuit board is disposed in the injection molded body, an external terminal of the circuit board extends out of the injection molded body, and the second protective layer is formed on an outer surface of the injection molded body by a protective material through a coating process or a deposition process.

7. The battery according to claim 1, wherein the battery further comprises a third protective layer formed of a protective material on the circuit board through a coating process or a deposition process.

8. The battery of claim 1, wherein the cell body further comprises two opposite large faces and two side faces connecting the two large faces, and the battery further comprises a fourth protective layer, wherein the fourth protective layer is formed by a protective material through a coating process or a deposition process on the side faces and/or a tail portion of the cell body, and the tail portion is opposite to the end of the cell body provided with the tab.

9. The battery according to claim 8, wherein the fourth protective layer is further attached to the two large faces and/or a contour line connecting the two large faces and the two side faces.

10. The battery according to claim 8, wherein the battery further comprises a label, and the first protective layer, the second protective layer, the third protective layer, the fourth protective layer and the label are formed of a protective material by a coating process or a deposition process in one step or in multiple steps; optionally, the indicia are formed on one or both of the major faces.

11. The battery according to claim 1, wherein the coating process comprises at least one of glue spraying, ink printing, digital printing, ink pad printing, and impregnation printing, and the deposition process comprises at least one of chemical vapor deposition, plasma enhanced chemical vapor deposition, physical vapor deposition, and sputtering.

12. The battery of claim 1, wherein the color of the protective material comprises a single color or multiple colors, optionally at least one of black, white, yellow, blue, green, and silver.

13. The battery of claim 1, wherein the protective material comprises an acrylate based material, further optionally one or more of a UV cure initiator, a leveling agent, a defoamer, a wetting agent, and a pigment.

14. The battery of claim 13, wherein the acrylate species comprises one or more of a monofunctional acrylate, a difunctional acrylate, and a trifunctional acrylate,

the monofunctional acrylate includes: one or two of ethyl acrylate, butyl acrylate, tetrahydrofuran acrylate, hydroxyethyl acrylate, isooctyl acrylate, isodecyl acrylate, dodecyl 2-acrylate, N-vinyl caprolactam, morpholine acrylate, ethyl 4- (N, N-dimethylamino) benzoate, tetrahydrofurfuryl acrylate and ethyl 5- (N, N-dimethylamino) benzoate;

the difunctional acrylates include: at least one of triethylene glycol dimethacrylate, 1, 9-nonanediol diacrylate, hexanediol diacrylate, 6- [ (4' -cyano-4-biphenyl) oxy ] hexyl methacrylate and 3-methyl-1, 5-pentanediol diacrylate;

the trifunctional acrylates include: trimethylolpropane triacrylate, and/or pentaerythritol triacrylate;

the UV curing initiator includes: 2-hydroxy-2-methyl-1-phenylpropanone, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-propanone, 2,4, 6-trimethylbenzoylphenylphosphonic acid ethyl ester, 2-dimethylamino-2-benzyl-1- [4- (4-morpholinyl) phenyl ] -1-butanone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-propanone, 2, 4-dihydroxybenzophenone;

the defoaming agent comprises: at least one of hydrophobic stearate, dimethyl polysiloxane, polypropylene glycol, polyether and polyether modified siloxane;

the wetting agent comprises: at least one of oleic acid, stearic acid, palmitic acid, linoleic acid, palmitic acid;

the leveling agent comprises: at least one of allyltrimethoxysilane, vinyltrimethoxysilane, allyltriethoxysilane, and vinyltriethoxysilane;

the pigment comprises carbon black or organic dye toner and 1, 6-hexanediol diacrylate, and optionally, the mass ratio of the carbon black or the organic dye toner is 0.1-3.9%, preferably 0.5%.

15. The battery according to claim 14, wherein the UV curing initiator accounts for 0.5 to 16% of the total mass of the monofunctional acrylate, difunctional acrylate and trifunctional acrylate.

16. An electrical consumer comprising a load and the battery of any one of claims 1 to 15, the battery powering the load.