Battery and battery device

Abstract

The utility model relates to the technical field of batteries, and provides a battery and a battery device, and the battery comprises a battery shell which comprises a cover plate and a shell part; the pole assembly is arranged on the cover plate, and at least part of the pole assembly is located on the outer side of the cover plate; the insulation sleeve covers the outer surface of the pole assembly, and at least part of the insulation sleeve is located on the outer side of the cover plate; the insulating coating covers at least part of the cover plate, and the insulating coating is located on the outer side of the cover plate; wherein the insulation sleeve covers at least part of the insulation coating, the coincident area of the orthographic projection of the insulation sleeve on the cover plate and the insulation coating is S1, the area enclosed by the circumferential outer edge of the cover plate is S2, and S1 / S2 is 0.2%-10%, so that reliable insulation protection of the insulation sleeve on the pole assembly can be ensured, and the coincident area of the insulation sleeve and the insulation coating can be ensured not to be too large; therefore, the overall heat dissipation performance of the battery shell is ensured, and the safe use performance of the battery device can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery and a battery device. Background Art

[0002] In the related art, a battery may include a pole assembly and a battery casing. The pole assembly may be disposed on a cover plate of the battery casing. In order to ensure the safety performance of the battery, the pole assembly and the cover plate need to be insulated and protected. However, due to the limitation of the insulation structure, the battery performance may be affected. Utility Model Content

[0003] The utility model provides a battery and a battery device to improve the performance of the battery.

[0004] In one aspect of the present invention, a battery is provided, comprising:

[0005] A battery housing is formed with a receiving space, and the battery housing includes a cover plate and a housing member, and the cover plate and the housing member are connected;

[0006] A pole assembly, the pole assembly is arranged on the cover plate, and at least a part of the pole assembly is located outside the cover plate away from the accommodation space;

[0007] An insulating sleeve, the insulating sleeve at least partially covers the outer surface of the pole assembly, and at least a portion of the insulating sleeve is located on the outer side of the cover plate away from the accommodation space;

[0008] an insulating coating, the insulating coating covering at least a portion of the cover plate, and the insulating coating is located on an outer side of the cover plate away from the accommodation space;

[0009] The insulating sleeve covers at least part of the insulating coating, the area where the orthographic projection of the insulating sleeve on the cover plate overlaps with the insulating coating is S1, the area enclosed by the circumferential outer edge of the cover plate is S2, and S1 / S2 is 0.2%-10%.

[0010] The battery of the embodiment of the utility model includes a battery shell, a pole assembly, an insulating sleeve and an insulating coating. The pole assembly is arranged on the cover plate of the battery shell, and at least part of the pole assembly is located on the outside of the cover plate. The insulating sleeve covers the outer surface of the pole assembly, and at least part of the insulating sleeve is located on the outside of the cover plate. The insulating coating covers at least part of the cover plate, and the insulating coating is located on the outside of the cover plate, so that the insulating coating and the insulating sleeve can form insulation protection for the cover plate and the pole assembly. The insulating sleeve covers at least part of the insulating coating, and the area where the positive projection of the insulating sleeve on the cover plate overlaps with the insulating coating is S1, and the area enclosed by the circumferential outer edge of the cover plate is S2, and S1 / S2 is 0.2%-10%, which can not only ensure the reliable insulation protection of the pole assembly by the insulating sleeve, but also ensure that the area where the insulating sleeve and the insulating coating overlap is not too large, thereby ensuring the overall heat dissipation performance of the battery shell, thereby effectively improving the safe use performance of the battery.

[0011] Another aspect of the present invention provides a battery device, comprising the above-mentioned battery.

[0012] The battery device of the embodiment of the utility model includes a battery shell, a pole assembly, an insulating sleeve and an insulating coating. The pole assembly is arranged on the cover plate of the battery shell, and at least part of the pole assembly is located on the outside of the cover plate. The insulating sleeve covers the outer surface of the pole assembly, and at least part of the insulating sleeve is located on the outside of the cover plate. The insulating coating covers at least part of the cover plate, and the insulating coating is located on the outside of the cover plate, so that the insulating coating and the insulating sleeve can form insulation protection for the cover plate and the pole assembly. The insulating sleeve covers at least part of the insulating coating, and the area where the positive projection of the insulating sleeve on the cover plate overlaps with the insulating coating is S1, and the area enclosed by the circumferential outer edge of the cover plate is S2, and S1 / S2 is 0.2%-10%, which can not only ensure the reliable insulation protection of the pole assembly by the insulating sleeve, but also ensure that the area where the insulating sleeve and the insulating coating overlap is not too large, thereby ensuring the overall heat dissipation performance of the battery shell, thereby effectively improving the safe use performance of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0014] Figure 1 is a schematic structural diagram of a battery according to an exemplary embodiment;

[0015] Figure 2is a schematic diagram of a partially exploded structure of a battery according to an exemplary embodiment;

[0016] Figure 3 is a schematic diagram of a partial structure of a battery device according to an exemplary embodiment;

[0017] Figure 4 is a schematic diagram of a partial cross-sectional structure of a battery according to an exemplary embodiment;

[0018] Figure 5 is based on Figure 4 A schematic top view of a pole assembly shown in an exemplary embodiment;

[0019] Figure 6 is a schematic top view of a battery according to an exemplary embodiment;

[0020] Figure 7 According to an exemplary embodiment, Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0021] The following are the descriptions of the reference numerals:

[0022] 10. Battery case; 11. Cover plate; 12. Case member; 13. Limiting portion; 131. Fixing section; 132. Pressing section; 20. Pole assembly; 21. Insulating covering area; 22. Welding exposed area; 30. Insulating sleeve; 31. Through hole; 40. Insulating coating; 50. Conductive bar; 60. Insulating member. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0024] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0025] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0026] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0027] An embodiment of the present invention provides a battery. Figures 1 to 7 The battery comprises: a battery shell 10, the battery shell 10 is formed with a receiving space, the battery shell 10 comprises a cover plate 11 and a shell member 12, the cover plate 11 and the shell member 12 are connected; a pole assembly 20, the pole assembly 20 is arranged on the cover plate 11, and at least a part of the pole assembly 20 is located on the outside of the cover plate 11 away from the receiving space; an insulating sleeve 30, the insulating sleeve 30 at least partially covers the outer surface of the pole assembly 20, and at least a part of the insulating sleeve 30 is located on the outside of the cover plate 11 away from the receiving space; an insulating coating 40, the insulating coating 40 covers at least a part of the cover plate 11, and the insulating coating 40 is located on the outside of the cover plate 11 away from the receiving space; wherein, the insulating sleeve 30 covers at least a part of the insulating coating 40, the area of ​​the insulating sleeve 30 overlapping with the insulating coating 40 on the cover plate 11 is S1, the area enclosed by the circumferential outer edge of the cover plate 11 is S2, and S1 / S2 is 0.2%-10%.

[0028] A battery according to an embodiment of the utility model comprises a battery case 10, a pole assembly 20, an insulating sleeve 30 and an insulating coating 40. The pole assembly 20 is arranged on a cover plate 11 of the battery case 10, and at least a portion of the pole assembly 20 is located on the outside of the cover plate 11. The insulating sleeve 30 covers the outer surface of the pole assembly 20, and at least a portion of the insulating sleeve 30 is located on the outside of the cover plate 11. The insulating coating 40 covers at least a portion of the cover plate 11, and the insulating coating 40 is located on the outside of the cover plate 11, so that the insulating coating 40 and the insulating sleeve 30 can form insulation protection for the cover plate 11 and the pole assembly 20. The insulating sleeve 30 covers at least a portion of the insulating coating 40, the area where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 is S1, the area enclosed by the circumferential outer edge of the cover plate 11 is S2, and S1 / S2 is 0.2%-10%, which can ensure that the insulating sleeve 30 can provide reliable insulation protection for the pole assembly 20, and can ensure that the overlapping area of ​​the insulating sleeve 30 and the insulating coating 40 is not too large, thereby ensuring the overall heat dissipation performance of the battery housing 10, thereby effectively improving the safe use performance of the battery.

[0029] It should be noted that, combined with Figure 1 and Figure 2 As shown, the battery housing 10 includes a cover plate 11 and a housing member 12 connected to each other, and the cover plate 11 and the housing member 12 can be welded to each other. The battery housing 10 is formed with a receiving space, and the receiving space is used to receive the battery cell, and the battery cell is used to be electrically connected to the pole assembly 20.

[0030] The pole assembly 20 is arranged on the cover plate 11, and at least part of the pole assembly 20 is located outside the cover plate 11 away from the accommodation space, so as to facilitate the connection between the pole assembly 20 and the conductive bar when the batteries are subsequently grouped. The pole assembly 20 can be arranged integrally with the cover plate 11; or, the pole assembly 20 and the cover plate 11 are of a split structure, and a pole through hole can be arranged on the cover plate 11, and the pole assembly 20 is arranged in the pole through hole.

[0031] The insulating sleeve 30 at least partially covers the outer surface of the pole assembly 20, and at least part of the insulating sleeve 30 is located on the outside of the cover plate 11 away from the accommodating space, thereby ensuring that the insulating sleeve 30 can form effective insulation protection for the outer surface of the pole assembly 20 and reduce the risk of short circuit in the battery.

[0032] The insulating coating 40 covers at least a portion of the cover plate 11 , and the insulating coating 40 is located on the outer side of the cover plate 11 , thereby ensuring that the insulating coating 40 provides insulating protection to the outer surface of the cover plate 11 .

[0033] The pole assembly 20 has a complex structure and uneven flatness. If the pole assembly 20 is sprayed with an insulating coating 40, the insulation effect may be poor, which may easily lead to insulation failure, and the sprayed pole assembly 20 is difficult to rework and repair. By providing an insulating sleeve 30 on the pole assembly 20, the sprayed pole assembly 20 can be replaced, or even if the pole assembly 20 is sprayed, the provision of the insulating sleeve 30 can avoid the problem of difficulty in rework and repair, and effectively improve the insulation protection capability of the pole assembly 20.

[0034] The insulating sleeve 30 covers at least a portion of the insulating coating 40, and the area where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 is S1, and the area enclosed by the circumferential outer edge of the cover plate 11 is S2, and S1 / S2 is 0.2%-10%. That is, by limiting the ratio of the area of ​​the insulating sleeve 30 covering the insulating coating 40 to the area of ​​the cover plate 11, the poor insulation performance of the sprayed pole assembly 20 can be avoided and the insulation performance of the pole assembly 20 area can be ensured, and the area of ​​the cover plate 11 protected by both the insulating coating 40 and the insulating sleeve 30 can be ensured not to be too large, so as to ensure the overall heat dissipation performance of the battery housing 10, thereby improving the overall safety performance of the battery.

[0035] The ratio of the area S1 where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 to the area S2 enclosed by the circumferential outer edge of the cover plate 11 can be 0.2%, 0.3%, 0.5%, 0.6%, 0.8%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5% or 10% and the like.

[0036] Combination Figure 6 As shown, the area enclosed by the circumferential outer edge of the cover plate 11 can be represented as S2, and the area where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 can be represented as S1, that is, the area where S1 in the figure is located is the area where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40. Figure 6 It is only a schematic view, which focuses on the area where the positive projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40, and the area enclosed by the circumferential outer edge of the cover plate 11, and does not impose specific restrictions on the corresponding structure.

[0037] In one embodiment, the insulating coating 40 may be made of ceramic materials such as aluminum oxide (Al 2 O 3 ) and zirconium oxide (ZrO 2 ).

[0038] In one embodiment, the thickness of the insulating coating 40 is H, the wall thickness of the insulating sleeve 30 covering the insulating coating 40 is D, and H / D is 0.2-2, which can ensure that the insulating coating 40 can form reliable insulation protection for the cover plate 11, and can avoid the thickness of the insulating coating 40 being too large, affecting the normal heat dissipation of the battery housing 10, thereby effectively ensuring the safety performance of the battery, and by controlling the thickness of the insulating coating 40 and the wall thickness of the insulating sleeve 30 covering the insulating coating 40, the heat dissipation capacity of the battery is guaranteed, thereby improving the safety performance of the battery.

[0039] Combination Figure 7 As shown, the thickness of the insulating coating 40 can be expressed as H, and the wall thickness of the insulating sleeve 30 covering the insulating coating 40 can be expressed as D. The thicker the thickness H of the insulating coating 40 is, the smaller the wall thickness D of the insulating sleeve 30 covering the insulating coating 40 should be, thereby making it easier for the battery to dissipate heat and avoiding battery safety issues.

[0040] A portion of the insulating sleeve 30 may cover the limiting portion 13 , and another portion of the insulating sleeve 30 may cover the insulating coating 40 , that is, the insulating sleeve 30 is similar to forming a flange structure, thereby achieving coverage of the insulating coating 40 .

[0041] The ratio of the thickness H of the insulating coating 40 to the wall thickness D of the insulating sleeve 30 covering the insulating coating 40 can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2, etc.

[0042] In the non-pole assembly 20 area of ​​the cover plate 11, setting an insulating coating 40 has a better heat dissipation effect than setting an insulating sleeve 30, and the heat dissipation capacity of the cover plate 11 will directly affect the safety performance of the battery. Therefore, by controlling the thickness of the insulating coating 40, the heat dissipation effect of the battery shell 10 can be effectively guaranteed.

[0043] In one embodiment, Figure 4 As shown, the pole assembly 20 includes an insulating covering area 21 and a welding exposed area 22, the insulating covering area 21 is arranged around the welding exposed area 22, and the insulating sleeve 30 covers at least a portion of the insulating covering area 21; wherein, the orthographic projection area of ​​the welding exposed area 22 on the plane where the cover plate 11 is located is S3, and the orthographic projection area of ​​the insulating covering area 21 on the plane where the cover plate 11 is located is S4, S3 / S4≥0.3, S1 / S2 is 0.2%-2%, thereby balancing the heat generation of the pole assembly 20 and the heat dissipation capacity of the battery housing 10, thereby avoiding the problem of excessive heat concentration, which in turn affects the safe use performance of the battery.

[0044] The higher the ratio of the orthographic projection area S3 of the welding exposure area 22 on the plane where the cover plate 11 is located to the orthographic projection area S4 of the insulating covering area 21 on the plane where the cover plate 11 is located, the more heat is generated by the welding of the pole assembly 20 and the conductive bar, and the smaller the upper limit of the ratio of the area S1 where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 to the area S2 enclosed by the circumferential outer edge of the cover plate 11, thereby meeting the overall heat dissipation of the battery housing 10 and avoiding heat concentration and safety problems caused by it.

[0045] The welding exposed area 22 refers to the portion of the pole assembly 20 exposed from the top of the pole assembly 20 as a viewing angle, and correspondingly, the insulating covered area 21 refers to the portion of the pole assembly 20 covered from the top of the pole assembly 20 as a viewing angle, for example, the portion of the pole assembly 20 covered by the insulating sleeve 30 and the portion covered by the insulating member 60. The welding exposed area 22 refers to the portion that can be used for welding with the conductive bar 50. Of course, not all portions of the welding exposed area 22 need to be welded with the conductive bar 50, and the emphasis here is on reflecting that the welding exposed area 22 will not be blocked.

[0046] like Figure 5 As shown, the orthographic projection area of ​​the welding exposure area 22 on the plane where the cover plate 11 is located can be expressed as S3, where S3 is the area within the area indicated by the arrow; the orthographic projection area of ​​the insulating covering area 21 on the plane where the cover plate 11 is located can be expressed as S4, where S4 refers to the area outside S3, that is, it can be considered as the difference between the area of ​​the outermost circle and the area of ​​S3.

[0047] The ratio of the orthographic projection area S3 of the welding exposure area 22 on the plane where the cover plate 11 is located to the orthographic projection area S4 of the insulating covering area 21 on the plane where the cover plate 11 is located can be 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5 or 2, etc.

[0048] In one embodiment, the insulating sleeve 30 is bonded to the insulating coating 40, and S1 / S2 is 0.5%-2%, which can prevent the insulating sleeve 30 from covering too large an area of ​​the insulating coating 40, thereby affecting the heat dissipation capacity of the battery housing 10, and can also ensure that there is sufficient fixing capacity between the insulating sleeve 30 and the insulating coating 40. After the insulating sleeve 30 is bonded to the insulating coating 40, there is a glue layer between the insulating sleeve 30 and the insulating coating 40, which hinders the heat dissipation. Therefore, the area S1 where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 can be reduced, thereby increasing the heat dissipation and improving the safety performance of the battery.

[0049] If the ratio of the area S1 where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 to the area S2 enclosed by the circumferential outer edge of the cover plate 11 is too large, the heat dissipation capacity of the battery housing 10 will be affected; if the ratio of the area S1 where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 to the area S2 enclosed by the circumferential outer edge of the cover plate 11 is too small, the insulating sleeve 30 will easily detach, thereby causing insulation failure of the pole assembly 20.

[0050] In one embodiment, Figure 4 As shown, a limiting portion 13 is provided on the cover plate 11, and the limiting portion 13 is provided around the pole assembly 20. The limiting portion 13 is bent into a fixing section 131 and a pressing section 132. The fixing section 131 is provided on the cover plate 11, and the pressing section 132 is pressed on the pole assembly 20, so that the pole assembly 20 is clamped between the pressing section 132 and the cover plate 11, and S1 / S2 is 0.5%-4%; wherein, the insulating sleeve 30 covers at least part of the limiting portion 13, and the limiting portion 13 can ensure reliable fixation of the pole assembly 20 to prevent the pole assembly 20 from detaching from the cover plate 11, and the insulating sleeve 30 can form insulation protection for the limiting portion 13.

[0051] A limiting portion 13 is provided on the cover plate 11, the area of ​​the pole assembly 20 is increased, and the heat dissipation area at other positions of the cover plate 11 is reduced. Therefore, the area S1 where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 can be reduced to prevent excessive occupation of the heat dissipation area.

[0052] The limiting portion 13 can be bent into a fixed section 131 and a pressing section 132, so that the pressing section 132 can be pressed onto the pole assembly 20, and the pole assembly 20 is clamped between the pressing section 132 and the cover plate 11. At this time, a certain angle is formed between the fixed section 131 and the pressing section 132, so that the fixed section 131 can be set on the cover plate 11, and the pressing section 132 can be pressed onto the pole assembly 20, thereby effectively preventing the pole assembly 20 from separating from the cover plate 11, thereby ensuring the safe use performance of the battery.

[0053] The pole assembly 20 and the cover plate 11 may be insulated and protected by an insulating member, or the pole assembly 20 and the cover plate 11 may be insulated and protected by a coating.

[0054] In one embodiment, Figure 4As shown, the pole assembly 20 includes an insulating covering area 21 and a welding exposure area 22, wherein the insulating covering area 21 is arranged around the welding exposure area 22, and the insulating covering area 21 is clamped between the pressing section 132 and the cover plate 11; wherein the insulating sleeve 30 is formed with a through hole 31, and the through hole 31 exposes the welding exposure area 22, thereby enabling the welding exposure area 22 to form an electrical connection with the conductive bar, and the insulating sleeve 30 can ensure insulation protection without affecting the electrical connection of the welding exposure area 22, thereby reliably improving the safety performance of the battery.

[0055] In one embodiment, the insulating sleeve 30 includes rubber, which can not only ensure the insulating ability of the insulating sleeve 30 but also facilitate the installation of the insulating sleeve 30 .

[0056] In one embodiment, Figure 1 and Figure 2 As shown, there are at least two pole assemblies 20 and at least two insulating sleeves 30. The at least two insulating sleeves 30 are arranged corresponding to the at least two pole assemblies 20 one by one, which can not only ensure that the insulating sleeves 30 can form effective insulation protection for the pole assemblies 20, but also avoid the insulating sleeves 30 being too large and affecting the heat dissipation capacity of the battery housing 10.

[0057] There can be two pole assemblies 20, and the two pole assemblies 20 can be a positive pole and a negative pole respectively. The battery can also include a battery cell, which is arranged in the battery shell 10, and the positive pole tab and the negative pole tab of the battery cell can be electrically connected to the positive pole and the negative pole respectively.

[0058] It should be noted that the battery includes a cell and an electrolyte, which is the smallest unit capable of performing electrochemical reactions such as charge / discharge. A cell refers to a unit formed by winding or laminating a stacked portion, the stacked portion including a first pole sheet, a separator, and a second pole sheet. When the first pole sheet is a positive pole sheet, the second pole sheet is a negative pole sheet. The polarities of the first pole sheet and the second pole sheet can be interchanged. The first pole sheet and the second pole sheet are coated with an active material.

[0059] In one embodiment, the battery is a quadrangular prism-type battery shell. The quadrangular prism-type battery shell mainly refers to a prism-shaped outer shape, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not necessarily right angles, and can be arc transitions.

[0060] The battery can be a laminated battery, which is not only convenient to group, but also can be processed to obtain a longer battery. Specifically, the battery cell is a laminated battery cell, which has a first pole piece stacked on top of each other, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery cell.

[0061] Alternatively, the battery may be a wound battery, that is, a first pole sheet, a second pole sheet with electrical properties opposite to the first pole sheet, and a diaphragm sheet arranged between the first pole sheet and the second pole sheet are wound to obtain a wound battery cell.

[0062] In one embodiment, the battery may be a cylindrical battery, or the battery may be a hexagonal prism battery. The battery may be a wound battery, that is, a first pole piece, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery cell.

[0063] An embodiment of the present invention further provides a battery device, comprising the above-mentioned battery.

[0064] A battery device according to an embodiment of the utility model includes a battery case 10, a pole assembly 20, an insulating sleeve 30 and an insulating coating 40. The pole assembly 20 is arranged on a cover plate 11 of the battery case 10, and at least a portion of the pole assembly 20 is located on the outside of the cover plate 11. The insulating sleeve 30 covers the outer surface of the pole assembly 20, and at least a portion of the insulating sleeve 30 is located on the outside of the cover plate 11. The insulating coating 40 covers at least a portion of the cover plate 11, and the insulating coating 40 is located on the outside of the cover plate 11, so that the insulating coating 40 and the insulating sleeve 30 can form insulation protection for the cover plate 11 and the pole assembly 20. The insulating sleeve 30 covers at least a portion of the insulating coating 40, the area where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 is S1, the area enclosed by the circumferential outer edge of the cover plate 11 is S2, and S1 / S2 is 0.2%-10%, which can ensure that the insulating sleeve 30 can provide reliable insulation protection for the pole assembly 20, and can ensure that the overlapping area of ​​the insulating sleeve 30 and the insulating coating 40 is not too large, thereby ensuring the overall heat dissipation performance of the battery housing 10, thereby effectively improving the safe use performance of the battery device.

[0065] In one embodiment, Figure 3 As shown, the battery device also includes a conductive bar 50, which is connected to the pole assembly 20. In the direction perpendicular to the large surface of the cover plate 11, the distance between the conductive bar 50 and the insulating coating 40 is ≤5mm, and S1 / S2 is 1%-10%. This ensures that the insulation capacity between the conductive bar 50 and the cover plate 11 is increased by controlling the area of ​​the insulating sleeve 30 covering the insulating coating 40, thereby reducing the risk of short circuit, thereby improving the safety performance of the battery device.

[0066] The largest surface of the cover plate 11 is the surface with the largest area of ​​the cover plate 11, that is, the surface covered by the insulating coating 40. The smaller the distance between the conductive bar 50 and the insulating coating 40, the smaller the creepage distance, and the higher the insulation requirement. The insulation capacity is ensured by making the lower limit of the ratio of the area S1 where the orthographic projection of the insulating sleeve 30 on the cover plate 11 overlaps with the insulating coating 40 to the area S2 surrounded by the circumferential outer edge of the cover plate 11 larger.

[0067] The conductive bar 50 and the pole assembly 20 may be connected by welding.

[0068] The distance between the conductive bar 50 and the insulating coating 40 may be 5 mm, 4.8 mm, 4.6 mm, 4.5 mm, 4.3 mm, 4.2 mm, 4 mm, 3.8 mm, 3.6 mm, 3.5 mm, 3.3 mm, 3.2 mm, 3 mm, 2.5 mm or 2 mm, etc.

[0069] In one embodiment, the battery device may include a plurality of batteries, and the battery device may be a battery module or a battery pack.

[0070] The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate, and the end plate and the side plate are used to fix the plurality of single batteries.

[0071] It should be noted that multiple batteries can be arranged in a battery box after forming a battery module, and multiple batteries can be fixed by end plates and side plates. Multiple batteries can be directly arranged in the battery box, that is, there is no need to group multiple batteries, in which case the end plates and side plates can be removed.

[0072] Those skilled in the art will readily come up with other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variation, use or adaptation of the present utility model, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and example embodiments are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0073] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A battery, characterized in that: include: A battery housing (10), wherein the battery housing (10) is formed with a receiving space, the battery housing (10) comprises a cover plate (11) and a housing member (12), and the cover plate (11) and the housing member (12) are connected; A pole assembly (20), the pole assembly (20) being arranged on the cover plate (11), and at least a portion of the pole assembly (20) being located on an outer side of the cover plate (11) away from the accommodation space; an insulating sleeve (30), the insulating sleeve (30) at least partially covering the outer surface of the pole assembly (20), and at least part of the insulating sleeve (30) being located on the outer side of the cover plate (11) away from the accommodating space; an insulating coating (40), the insulating coating (40) covering at least a portion of the cover plate (11), and the insulating coating (40) being located on an outer side of the cover plate (11) away from the accommodating space; The insulating sleeve (30) covers at least a portion of the insulating coating (40), an area where an orthographic projection of the insulating sleeve (30) on the cover plate (11) overlaps with the insulating coating (40) is S1, an area enclosed by a circumferential outer edge of the cover plate (11) is S2, and S1 / S2 is 0.2%-10%.

2. The battery according to claim 1, characterized in that The thickness of the insulating coating (40) is H, the wall thickness of the insulating sleeve (30) covering the insulating coating (40) is D, and H / D is 0.2-2.

3. The battery according to claim 1, characterized in that The pole assembly (20) comprises an insulating covering area (21) and a welding exposed area (22), the insulating covering area (21) is arranged around the welding exposed area (22), and the insulating sleeve (30) covers at least a portion of the insulating covering area (21); The orthographic projection area of ​​the welding exposure area (22) on the plane where the cover plate (11) is located is S3, the orthographic projection area of ​​the insulating covering area (21) on the plane where the cover plate (11) is located is S4, S3 / S4≥0.3, and S1 / S2 is 0.2%-2%.

4. The battery according to claim 1, characterized in that The insulating sleeve (30) is bonded to the insulating coating (40), and S1 / S2 is 0.5%-2%.

5. The battery according to any one of claims 1 to 4, characterized in that A limiting portion (13) is provided on the cover plate (11), the limiting portion (13) is arranged around the pole assembly (20), the limiting portion (13) is bent into a fixed section (131) and a pressing section (132), the fixed section (131) is arranged on the cover plate (11), and the pressing section (132) is pressed on the pole assembly (20), so that the pole assembly (20) is clamped between the pressing section (132) and the cover plate (11), the insulating sleeve (30) covers at least part of the limiting portion (13), and S1 / S2 is 0.5%-4%.

6. The battery according to claim 5, characterized in that The pole assembly (20) comprises an insulating covering area (21) and a welding exposed area (22), the insulating covering area (21) is arranged around the welding exposed area (22), and the insulating covering area (21) is clamped between the pressing section (132) and the cover plate (11); The insulating sleeve (30) is formed with a through hole (31), and the through hole (31) exposes the welding exposure area (22).

7. The battery according to any one of claims 1 to 4, characterized in that There are at least two pole assemblies (20), and there are at least two insulating sleeves (30). The at least two insulating sleeves (30) are arranged in a one-to-one correspondence with the at least two pole assemblies (20).

8. The battery according to any one of claims 1 to 4, characterized in that The battery is a quadrangular prism battery.

9. A battery device, characterized in that: A battery comprising any one of claims 1 to 8.

10. The battery device according to claim 9, characterized in that: The battery device also includes a conductive bar (50), the conductive bar (50) being connected to the pole assembly (20), and the distance between the conductive bar (50) and the insulating coating (40) in a direction perpendicular to the large surface of the cover plate (11) is ≤5 mm, and S1 / S2 is 1%-10%.

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