Battery and battery pack

Abstract

The utility model provides a battery and a battery pack, and relates to the technical field of batteries. The battery cell is located in the shell, and at least one end of the battery cell in the first direction is provided with a tab; an insulating coating is arranged on the inner side wall of one end, opposite to the tab, of the shell in the circumferential direction; the width of the shell in the first direction is H, the width of the insulating coating in the first direction is h, and h is larger than or equal to 0.05 H and smaller than or equal to 0.2 H. The insulating coating is arranged on the inner side wall of the alignment area of the shell and the tab, so that a good insulating relationship is kept between the tab and the shell, the risk of short circuit caused by falling of insulating glue is reduced, the tab can be arranged closer to the shell, and the space in the shell is further released; by reasonably arranging the distribution area of the insulating coating, the insulating effect between the shell and the tabs can be ensured, and the thickness of the shell in other areas can be reduced, so that the design energy of the battery is increased.

Description

Technical Field

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

[0002] The battery usually includes a shell and a battery cell inside the shell. The positive and negative pole tabs in the battery cell are led out of the shell to form the positive and negative poles respectively, so that the battery can work normally. The positive and negative pole tabs need to be insulated inside the shell to avoid short circuits between the positive and negative poles of the battery and the shell. In the related art, the problem of short circuits between the tabs and the shell is reduced by sticking insulating glue on the tabs. However, during use, there is a risk of the insulating glue falling off, which can easily cause short circuits. Utility Model Content

[0003] The embodiments of the present application provide a battery and a battery pack that reduce the risk of short circuits and alleviate corrosion problems caused by internal short circuits.

[0004] In a first aspect, an embodiment of the present application provides a battery, comprising a housing and a battery cell;

[0005] The battery cell is located in the housing, and a pole ear is provided at least at one end of the battery cell in the first direction;

[0006] An insulating coating is provided on the circumference of the inner side wall of one end of the shell that is opposite to the pole ear;

[0007] The width of the shell along the first direction is H, and the width of the insulating coating along the first direction is h, wherein 0.05H≤h≤0.2H.

[0008] In some embodiments, the housing includes two end plates disposed at opposite ends of the first direction, and a side plate disposed between the two end plates;

[0009] An insulating coating is provided on the inner side wall of the end plate at one end of the housing that is aligned with the pole lug;

[0010] An insulating coating is provided on the circumference of the inner side wall of one end of the side plate that is aligned with the pole ear.

[0011] In some embodiments, the tabs include a positive tab and a negative tab;

[0012] The positive electrode tab and the negative electrode tab are both arranged at the same end of the battery cell in the first direction;

[0013] An insulating coating is provided on the inner side wall of the end plate at one end of the housing that is aligned with the positive electrode tab and the negative electrode tab;

[0014] An insulating coating is provided on the circumference of the inner wall of one end of the side plate that is aligned with the positive electrode tab and the negative electrode tab.

[0015] In some embodiments, the tabs include a positive tab and a negative tab;

[0016] The positive electrode tab and the negative electrode tab are respectively arranged at two opposite ends of the battery cell in the first direction;

[0017] The inner side walls of the two end plates in the housing and the inner side walls at both ends of the side plate in the first direction are all provided with insulating coatings in the circumferential direction.

[0018] In some embodiments, a groove is formed on the insulating coating;

[0019] The extending direction of the groove is the same as the extending direction of the pole ear, and the width of the groove is greater than or equal to the width of the pole ear;

[0020] The pole ear is arranged in the groove.

[0021] In some embodiments, the width of the groove is D, and the width of the tab is d, wherein 1.1d≤D≤1.3d.

[0022] In some embodiments, the insulating coating has coating stripes; an extending direction of the coating stripes is the same as an extending direction of the electrode tabs.

[0023] In some embodiments, the thickness of the insulating coating is 1-2 mm.

[0024] In some embodiments, the battery further includes a pole, one end of which is disposed outside the shell, and the other end of which penetrates the shell and is connected to the pole lug.

[0025] In some embodiments, the poles include a positive pole and a negative pole;

[0026] A resistor sheet is arranged between the positive electrode column and the outer side wall of the shell;

[0027] An insulating member is arranged between the negative electrode column and the outer side wall of the shell.

[0028] In a second aspect, an embodiment of the present application provides a battery pack comprising the battery as described above.

[0029] Beneficial effects of the embodiments of the present application:

[0030] In an embodiment of the present application, a battery includes a shell and a battery cell, the battery cell is located in the shell, and a pole ear is provided at least at one end of the battery cell in a first direction, and an insulating coating is provided circumferentially on the inner side wall of one end of the battery cell that is aligned with the pole ear; since the insulating coating is provided on the inner side wall of the area where the shell and the pole ear are aligned, a good insulation relationship is maintained between the pole ear and the shell, and there is no need to stick insulating glue on the outside of the pole ear, thereby reducing the risk of short circuit caused by the falling of the insulating glue, and the pole ear can also be arranged closer to the shell, further releasing the space in the shell, increasing the volume of the battery cell, and improving the energy efficiency of the battery; wherein, the width of the shell in the first direction is H, and the width of the insulating coating in the first direction is h, 0.05H≤h≤0.2H, since the insulating coating has a certain thickness, and the battery cell has insulating components at other positions, by reasonably setting the distribution area of ​​the insulating coating, both the insulation effect between the shell and the pole ear can be guaranteed and the thickness of the shell in other areas can be reduced, thereby increasing the design energy of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 is a schematic diagram of the structure of the battery provided in Example 1 of the present application;

[0033] Figure 2 is a schematic cross-sectional structural diagram of a housing provided in Example 1 of the present application;

[0034] Figure 3 is a front structural schematic diagram of a housing provided in Example 1 of the present application;

[0035] Figure 4 is a schematic diagram of the structure of a battery provided in Example 2 of the present application;

[0036] Figure 5 is a schematic cross-sectional structural diagram of a housing provided in Example 2 of the present application;

[0037] Figure 6 is a front structural schematic diagram of a housing provided in Example 2 of the present application;

[0038] Figure 7 It is a schematic diagram of the structure of the insulating coating provided in an embodiment of the present application.

[0039] Description of reference numerals:

[0040] 1. Shell; 2. Battery cell; 31. Positive electrode tab; 32. Negative electrode tab; 4. Insulating coating; 41. Groove; 51. Positive electrode post; 511. Resistor; 52. Negative electrode post; 521. Insulating member. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0042] In the related art, in order to ensure that there is no short circuit between the pole ear and the inside of the battery, insulating glue is usually affixed to the pole ear. However, during the use of the battery, the insulating glue is prone to aging and falling off, causing a short circuit problem. In addition, in order to reduce the damage caused by friction between the insulating glue on the surface of the pole ear and the outer shell, an insulating baffle is usually set between the pole ear and the outer shell, which encroaches on the space of the battery, thereby reducing the energy efficiency of the battery.

[0043] An embodiment of the present application provides a battery, comprising a housing 1 and a battery cell 2;

[0044] The battery cell 2 is located in the housing 1, and a pole ear is provided at least at one end of the battery cell 2 in the first direction X;

[0045] An insulating coating 4 is provided on the circumference of the inner side wall of the housing 1 at one end facing the tab;

[0046] The width of the housing 1 along the first direction X is H, and the width of the insulating coating 4 along the first direction X is h, wherein 0.05H≤h≤0.2H.

[0047] Since an insulating coating 4 is provided on the inner wall of the area where the outer shell 1 and the pole ear are aligned, a good insulating relationship is maintained between the pole ear and the outer shell 1, and there is no need to stick insulating glue on the outside of the pole ear, thereby reducing the risk of short circuit caused by the falling off of the insulating glue. The pole ear can also be arranged closer to the outer shell 1, further freeing up the space inside the outer shell 1, increasing the volume of the battery cell 2, and improving the energy efficiency of the battery.

[0048] The width of the shell 1 in the first direction X is H, the width of the insulating coating 4 in the first direction X is h, and 0.05H≤h≤0.2H. Since the insulating coating 4 has a certain thickness, it will occupy the space inside the shell 1. By reasonably setting the distribution area of ​​the insulating coating 4, it is possible to ensure the insulation effect between the shell 1 and the tab, and reduce the thickness of the shell 1 in other areas, thereby increasing the design energy of the battery.

[0049] Further, the width h of the insulating coating 4 in the first direction X and the width H of the upper end of the housing 1 in the first direction X can be set to: h=0.05H, h=0.1H, h=0.15H or h=0.2H.

[0050] The insulating coating 4 can be made by blue film pasting, etching or spraying, etc., which is not limited in the present application, as long as insulation can be achieved.

[0051] When the insulating coating 4 is prepared by spraying, the materials of the insulating coating 4 mainly include polyester materials, epoxy materials and polyethylene, etc. In order to improve the service life and insulation effect of the insulating coating 4, polyoxymethylene resin (POM) and polytetrafluoroethylene (PTFE) can be selected as the materials of the insulating coating 4, so that the prepared insulating coating 4 has good hardness, adhesion and wear resistance. Exemplarily, the mass ratio of POM and polytetrafluoroethylene is selected to be 96:4.

[0052] When the insulating coating 4 is applied, an electrostatic spraying process can be selected, which has the advantages of cleanliness, energy saving and high efficiency. For example, during the electrostatic spraying process, the spraying voltage can be set to 40 kV, the powder supply pressure can be set to 0.3 MPa, the curing time can be set to 10 min, and the curing temperature can be set to 180°C.

[0053] In some embodiments, the housing 1 may be an aluminum housing. Aluminum alloy materials have the characteristics of low density, high specific strength and high specific modulus, and can have sufficient mechanical strength and stability while maintaining lightweight; aluminum and aluminum alloys have good corrosion resistance and excellent thermal conductivity, which helps to improve the corrosion resistance and thermal conductivity of the battery, thereby improving the safety and stability of the battery; aluminum alloy materials are easy to process into various shapes and sizes, and the processing difficulty is relatively low.

[0054] In some embodiments, the housing 1 includes two end plates disposed at opposite ends of the first direction X, and a side plate disposed between the two end plates;

[0055] An insulating coating 4 is provided on the inner side wall of the end plate at one end of the housing 1 that is aligned with the tab;

[0056] An insulating coating 4 is provided on the circumference of the inner wall of one end of the side plate that is aligned with the pole lug.

[0057] In the related art, an insulating film is usually provided on the inner wall of the end plate in the housing 1, and insulation is achieved between the pole ear and the inner wall of the end plate through the insulating film, but the insulating film also has the risk of aging, corrosion and falling off.

[0058] In an embodiment of the present application, the insulating coating 4 is simultaneously arranged on the inner walls of the end plate and the side plate corresponding to the pole ear, and the pole ear, the side plate and the end plate are all insulated by the insulating coating 4, thereby reducing or avoiding the problem of short circuit between the inner pole ear of the battery and the outer shell 1.

[0059] It should be noted that in the embodiment of the present application, the shape of the outer shell 1 can be a cylindrical, rectangular or other structure. Corresponding to the shape of the outer shell 1, the shape of the battery cell 2 can also be a cylindrical or rectangular structure. When the outer shell 1 is a cylindrical structure, it includes end plates arranged at opposite ends and a cylindrical side wall connected between the two end plates. The manufacturing process of the cylindrical battery is relatively simple, and the structure is relatively compact, which is easy to achieve large-scale production. When the outer shell 1 is a rectangular structure, it includes end plates arranged at opposite ends and four side plates arranged between the two end plates. The rectangular structure battery has high stability, can work in different environments, has a wide range of usage scenarios, and is safe and reliable.

[0060] Example 1

[0061] like Figure 1-3 As shown, in the battery provided by this embodiment, the tabs include a positive tab 31 and a negative tab 32; the positive tab 31 and the negative tab 32 are both arranged at the same end of the battery cell 2 in the first direction X; an insulating coating 4 is arranged on the inner wall of the end plate of the housing 1 at one end corresponding to the positive tab 31 and the negative tab 32; an insulating coating 4 is arranged on the circumferential direction of the inner wall of the side plate at one end corresponding to the positive tab 31 and the negative tab 32.

[0062] In this embodiment, the battery adopts a top-out tab structure, and the positive direction of the first direction X is upward, and the negative direction is downward. Figure 1 As shown, the positive electrode tab 31 and the negative electrode tab 32 are both arranged at the upper end of the housing 1; correspondingly, as Figure 2 As shown, an insulating coating 4 is provided on the circumference of the inner side wall of the end plate at the upper end of the housing 1 and the inner side wall of the upper end of the side plate.

[0063] By adopting the design method of ejecting the tabs, it is easier to connect the tabs to external devices or circuits during the battery assembly process, and it can flexibly adapt to the needs of different battery shapes and sizes, making the internal space layout of the battery more reasonable, which helps to improve the energy density of the battery and reduce the overall volume and weight of the battery, thereby achieving the needs of lightweight and miniaturization. In addition, the use of ejecting the tabs can also simplify some process steps in the battery manufacturing process, reduce material input, and help reduce the production cost of the battery.

[0064] When the battery cell 2 is installed in the housing 1 , the positions where the positive electrode tab 31 and the negative electrode tab 32 contact the housing 1 are provided with an insulating coating 4 , thereby ensuring the insulation effect between the positive electrode tab 31 and the negative electrode tab 32 and the housing 1 .

[0065] Furthermore, if Figure 3 As shown, the width of the distribution area of ​​the insulating coating 4 in the first direction X is h, and the overall width of the shell 1 in the first direction X is H, 0.05H≤h≤0.2H, which can not only ensure the insulation effect between the pole ear and the shell 1, but also avoid the insulating coating 4 distribution area being too large, which affects the space of the battery cell 2, thereby improving the space utilization rate in the battery and being beneficial to improving the design energy of the battery.

[0066] Example 2

[0067] like Figure 4-6 As shown, in the battery provided in this embodiment, the tabs include a positive tab 31 and a negative tab 32; the positive tab 31 and the negative tab 32 are respectively arranged at the opposite ends of the battery cell 2 in the first direction X; the inner walls of the two end plates in the outer shell 1, and the inner walls of the side plates at both ends of the first direction X are circumferentially provided with an insulating coating 4.

[0068] That is, an insulating coating 4 is provided on the inner wall of the end plate and the side plate at one end of the positive electrode tab 31 and the negative electrode tab 32, and the outer shell 1 and the positive electrode tab 31 and the negative electrode tab 32 are insulated to prevent the internal short circuit problem of the battery.

[0069] In this embodiment, the battery adopts a side-outlet tab structure, the positive direction of the first direction X is right, and the negative direction is left; Figure 4 As shown, the positive electrode tab 31 is located at the left end of the housing 1, and the negative electrode tab 32 is located at the right end of the housing 1. Figure 5 As shown, the end plates at the left and right ends of the housing 1, as well as the side plates are provided with insulating coatings 4 in the circumferential direction of both left and right ends.

[0070] Since the pole ear extends from the side of the shell 1, it can be more easily connected to the external connector or circuit board, reducing the difficulty of assembly and improving production efficiency; the design of the side-outlet pole ear helps to optimize the current path and reduce the transmission distance of the current inside the battery, thereby reducing the internal resistance and further improving the energy output of the battery during discharge; the side-outlet pole ear design makes the battery structure more compact and improves space utilization.

[0071] When the battery cell 2 is installed in the housing 1 , the positions where the positive electrode tab 31 and the negative electrode tab 32 contact the housing 1 are provided with an insulating coating 4 , thereby ensuring the insulation effect between the positive electrode tab 31 and the negative electrode tab 32 and the housing 1 .

[0072] Furthermore, if Figure 6 As shown, the width of the distribution area of ​​the insulating coating 4 in the first direction X is h, and the overall width of the shell 1 in the first direction X is H, 0.05H≤h≤0.2H, which can not only ensure the insulation effect between the pole ear and the shell 1, but also avoid the insulating coating 4 distribution area being too large, which affects the space of the battery cell 2, thereby improving the space utilization rate in the battery and being beneficial to improving the design energy of the battery.

[0073] In some embodiments, Figure 7 As shown, a groove 41 is provided on the insulating coating 4 ; the extending direction of the groove 41 is the same as the extending direction of the pole lug, and the width of the groove 41 is greater than or equal to the width of the pole lug; the pole lug is arranged in the groove 41 .

[0074] The tabs are arranged in the grooves 41 of the insulating coating 4 to position the tabs, thereby reducing the friction and movement between the tabs and the housing 1 during the use of the battery, thereby reducing the probability of wear of the tabs and the housing 1 and extending the life of the battery.

[0075] It should be understood that the extension direction of the groove 41 is the length direction of the groove 41. Taking the structure of the battery in Example 1 as an example, after the pole ear extends out from the battery cell 2, it first extends along the direction of the first direction X, and after bending at a position close to the end plate of the outer shell 1, it continues to extend in a direction perpendicular to the first direction X; correspondingly, the groove in the insulating coating 4 on the inner side wall of the side plate of the outer shell 1 also extends along the first direction X, while the groove on the inner side wall of the end plate extends in a direction perpendicular to the first direction X; the pole ear can be embedded in the groove 41, and the groove 41 limits the pole ear, thereby reducing the shaking and friction of the pole ear.

[0076] Furthermore, the width of the groove 41 is D, and the width of the tab is d, wherein 1.1d≤D≤1.3d.

[0077] That is, the width of the groove 41 is slightly larger than the width of the tab, so that the tab can be smoothly embedded in the groove 41 during the battery assembly process, and during the use of the battery, the shaking of the tab in the width direction can be reduced, ensuring the positioning of the tab and further reducing the probability of tab wear.

[0078] Exemplarily, the width D of the groove 41 and the width d of the tab may be set to: D=1.1d, D=1.2d or D=1.3d.

[0079] In some embodiments, the insulating coating 4 has coating stripes; the extending direction of the coating stripes is the same as the extending direction of the electrode tabs.

[0080] The coating stripes in the insulating coating 4 can effectively block the conduction of electric current, thereby improving the insulating effect of the insulating coating 4 . The design of the coating stripes combines material science and engineering principles, and can ensure the stability of the insulating coating 4 .

[0081] By setting the extension direction of the coating stripes to be the same as the extension direction of the pole lug, the friction between the pole lug and the coating stripes can be reduced, thereby reducing the friction damage between the pole lug and the insulating coating 4.

[0082] In some embodiments, the thickness of the insulating coating 4 is 1-2 mm.

[0083] The thickness of the insulating coating is an important parameter that affects the insulation performance, mechanical properties and service life of the coating. In specific applications, the thickness of the insulating coating is required to be 1-2mm, which is determined based on the required electrical insulation strength, wear resistance, corrosion resistance and expected service life of the coating.

[0084] It should be noted that the thickness of the insulating coating 4 is not selected randomly, but needs to be determined according to specific industry standards, national standards or International Electrotechnical Commission standards (IEC standards).

[0085] At the same time, different types of insulating coating 4 materials may also have different thickness requirements. In addition, the construction method and process of the insulating coating may also affect the final coating thickness.

[0086] Therefore, when selecting and applying the insulating coating, it is necessary to comprehensively consider a variety of factors, including the coating material, performance requirements, construction conditions, and relevant standards and specifications, so as to ensure that the insulating coating 4 has good insulating properties, mechanical properties, and service life, thereby meeting the needs of practical applications.

[0087] Illustratively, the thickness of the insulating coating 4 may be 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm or 2 mm.

[0088] In some embodiments, the battery further includes a pole, one end of which is disposed outside the housing 1 , and the other end of which penetrates the housing 1 and is connected to a pole lug.

[0089] The pole establishes a connection between the internal and external circuits of the battery, allowing electrical energy to be transmitted between the two. The pole is responsible for outputting the electrical energy stored in the battery to the external circuit, or inputting the electrical energy in the external circuit into the battery for storage.

[0090] During the connection process between the pole and the lug, technologies such as laser welding can be used to ensure a firm connection between the pole and the lug while meeting the safety and performance requirements of the battery.

[0091] Furthermore, if Figure 1 and 4 As shown, the poles include a positive pole 51 and a negative pole 52 ; a resistor 511 is arranged between the positive pole 51 and the outer wall of the housing 1 ; an insulating member 521 is arranged between the negative pole 52 and the outer wall of the housing 1 .

[0092] The positive electrode post 51 is connected to the positive electrode tab 31 , and the negative electrode post 52 is connected to the negative electrode tab 32 .

[0093] That is, the battery adopts a positive electrode weak conductivity setting, a resistor 511 is present between the positive electrode post 51 and the outer shell 1, and the negative electrode post 52 and the outer shell 1 are insulated; according to the voltage division principle of Ohm's law, the voltage between the outer shell 1 and the positive electrode post 51 is approximately equal to the open circuit voltage of the battery, and the outer shell 1 is positively charged, thereby destroying the corrosion conditions of the outer shell 1 and delaying the corrosion of the outer shell 1; and the negative electrode post 52 is insulated from the outer wall of the outer shell 1 by an insulating member 521 to prevent short circuit; inside the outer shell 1, the insulation effect is ensured by an insulating coating 4 arranged in the corresponding areas of the positive electrode tab 31 and the negative electrode tab 32, thereby reducing or avoiding the problem of short circuit in the battery.

[0094] In a second aspect, an embodiment of the present application provides a battery pack comprising the battery as described above.

[0095] The beneficial effects of the battery pack provided in this application are basically the same as those of the above-mentioned battery and will not be repeated here.

[0096] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery, characterized in that: Including casing and battery core; The battery cell is located in the housing, and a pole ear is provided at at least one end of the battery cell in the first direction; An insulating coating is provided on the circumference of the inner side wall of one end of the shell that is aligned with the tab; The width of the shell along the first direction is H, and the width of the insulating coating along the first direction is h, wherein 0.05H≤h≤0.2H.

2. The battery according to claim 1, characterized in that The housing comprises two end plates arranged at opposite ends of the first direction, and a side plate arranged between the two end plates; The insulating coating is provided on the inner side wall of the end plate at one end of the housing that is aligned with the tab; The insulating coating is provided on the circumference of the inner side wall of one end of the side plate that is aligned with the pole tab.

3. The battery according to claim 2, characterized in that The tabs include a positive tab and a negative tab; The positive electrode tab and the negative electrode tab are both arranged at the same end of the battery cell in the first direction; The insulating coating is provided on the inner side wall of the end plate at one end of the housing that is aligned with the positive electrode tab and the negative electrode tab; The insulating coating is provided on the circumference of the inner side wall of one end of the side plate that is aligned with the positive electrode tab and the negative electrode tab.

4. The battery according to claim 2, characterized in that The tabs include a positive tab and a negative tab; The positive electrode tab and the negative electrode tab are respectively arranged at two opposite ends of the battery cell in the first direction; The inner side walls of the two end plates in the housing and the inner side walls of the side plates at both ends in the first direction are all provided with the insulating coating in the circumferential direction.

5. The battery according to any one of claims 2 to 4, characterized in that: The insulating coating is provided with a groove; The extending direction of the groove is the same as the extending direction of the pole lug, and the width of the groove is greater than or equal to the width of the pole lug; The pole ear is arranged in the groove.

6. The battery according to claim 5, characterized in that The width of the groove is D, and the width of the tab is d, wherein 1.1d≤D≤1.3d.

7. The battery according to any one of claims 2 to 4 or 6, characterized in that: The insulating coating has coating stripes; the extending direction of the coating stripes is the same as the extending direction of the pole ear.

8. The battery according to any one of claims 2 to 4 or 6, characterized in that: The thickness of the insulating coating is 1-2 mm.

9. The battery according to claim 1, characterized in that The battery further comprises a pole, one end of which is arranged outside the shell, and the other end of which penetrates the shell and is connected to the pole lug.

10. The battery according to claim 9, characterized in that The poles include a positive pole and a negative pole; A resistor sheet is arranged between the positive electrode column and the outer side wall of the shell; An insulating member is arranged between the negative electrode column and the outer side wall of the shell.

11. A battery pack, characterized in that: Comprising a battery as claimed in any one of claims 1 to 10.

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