Battery monomer, battery and electric device

Abstract

The utility model relates to a battery monomer, a battery and a power utilization device. The battery monomer comprises: a housing comprising a shell and an end cover, and the end cover is provided with a mounting hole in a penetrating manner along the thickness direction of the end cover; the pole comprises a first conductive part and a second conductive part which is convexly arranged on one side of the first conductive part, the first conductive part is positioned on one side, facing the shell, of the end cover, and the second conductive part is arranged in the mounting hole in a penetrating manner; the adapter is located on the side, facing the shell, of the pole and comprises a first adapter part and a second adapter part, the first adapter part and the first conductive part are arranged in a stacked mode and electrically connected, and the second adapter part extends out of the first conductive part in the length direction of the end cover; in the thickness direction of the end cover, the orthographic projection of the easy-to-ignite area falls outside the orthographic projection of the second switching part, and / or the distance between the end cover and the second switching part is L, and L is larger than or equal to 0.8 mm and smaller than or equal to 6.5 mm. According to the battery monomer, the battery and the power utilization device provided by the invention, the safety can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery cell, a battery and an electrical device. Background Art

[0002] With the development of battery technology, batteries are widely used in various fields due to their advantages such as better environmental protection, long battery life, and high cost performance.

[0003] A battery includes a plurality of battery cells. When a battery undergoes thermal runaway, the temperature inside the battery rapidly rises to a very high temperature, causing the insulating member on the side of the end cap facing the housing in the battery cell to melt and lose its insulating effect. At the same time, the end cap is deformed under the influence of heat and the internal air pressure of the battery cell, resulting in the end cap coming into contact with the adapter and forming a short circuit, and even causing a spark. Continuous sparking will penetrate the end cap and cause the battery to burn, posing a serious hazard to the safety of the battery. Utility Model Content

[0004] Based on this, in view of the above problems, it is necessary to provide a battery cell, a battery and an electrical device that can improve safety.

[0005] A battery cell, the battery cell includes:

[0006] A housing, including a housing body and an end cap, the end cap is provided with a mounting hole penetrating along its thickness direction;

[0007] A terminal post, including a first conductive portion and a second conductive portion protruding from one side of the first conductive portion, the first conductive portion is located on the side of the end cap facing the housing body, and the second conductive portion penetrates through the mounting hole;

[0008] An adapter, located on the side of the terminal post facing the housing body, and including a first adapter portion and a second adapter portion, the first adapter portion is stacked with the first conductive portion and electrically connected to the first conductive portion, and the second adapter portion extends out of the first conductive portion along the length direction of the end cap;

[0009] Wherein, the end cap has an easy-to-spark area corresponding to the adapter. In the thickness direction of the end cap, the orthographic projection of the easy-to-spark area falls outside the orthographic projection of the second adapter portion, and / or, the distance between the end cap and the second adapter portion is L, 0.8 mm ≤ L ≤ 6.5 mm.

[0010] In some embodiments, the second adapter portion has an edge area arranged along the width direction of the end cap, the easy-to-spark areas correspond to the edge areas one by one, and in the thickness direction of the end cap, the orthographic projection of the easy-to-spark area falls outside the orthographic projection of the corresponding edge area.

[0011] In some of these embodiments, the first adapter portion protrudes relative to the second adapter portion in the direction towards the end cap, and the protruding height is L1, where 1 mm ≤ L1 ≤ 3 mm.

[0012] In some of these embodiments, the first adapter portion protrudes relative to the second adapter portion in the direction towards the end cap, and the total thickness of the first adapter portion is L2, where 1.5 mm ≤ L2 ≤ 3.5 mm.

[0013] In some of these embodiments, the width of the second adapter portion in the width direction of the end cap is L3, where 35 mm ≤ L3 ≤ 45 mm.

[0014] In some of these embodiments, the second adapter portion is recessed relative to the first adapter portion in the direction away from the end cap, and the recessed distance is L4, where 0.3 mm ≤ L4 ≤ 1 mm.

[0015] In some of these embodiments, the second adapter portion is recessed relative to the first adapter portion in the direction away from the end cap, and the total thickness of the second adapter portion is L5, where 0.2 mm ≤ L5 ≤ 1 mm.

[0016] In some of these embodiments, a seal is further included. The seal is at least partially located in the mounting hole and is used to seal and connect the second conductive portion and the end cap.

[0017] A battery includes a battery cell as described in any one of the above embodiments.

[0018] An electrical device includes the battery as described in the above embodiments, and the battery is used to provide electrical energy.

[0019] In the above battery cell, battery, and electrical device, in the thickness direction of the end cap, the orthographic projection of the easy-to-spark area falls outside the orthographic projection of the second adapter portion. Therefore, when the first insulating member melts and the end cap deforms under the influence of high temperature and the internal pressure of the battery cell, the easy-to-spark area of the end cap is also less likely to come into contact with the second adapter portion of the adapter, thereby reducing the risk of short circuit due to contact between the end cap and the adapter. The distance between the end cap and the second adapter portion is L, where 0.8 mm ≤ L ≤ 6.5 mm. In this way, there is a relatively safe spacing range between the easy-to-spark area and the second adapter portion. Even if the end cap deforms, it is less likely for the end cap to come into contact with the second adapter portion of the adapter, thereby reducing the risk of contact and short-circuit sparking between the end cap and the second adapter portion of the adapter, and improving the safety of the battery. Description of the Drawings

[0020] Figure 1 is an exploded view of a battery cell according to an embodiment of the present application;

[0021] Figure 2 is Figure 1The sectional view of the battery cells in combination along the A-A direction as shown;

[0022] Figure 3 is Figure 2 The enlarged schematic view of the partial structure B of the battery cell as shown;

[0023] Figure 4 The front view of the adapter of the battery cell in an embodiment of the present application;

[0024] Figure 5 The structural schematic view of the second transfer part of the adapter of the battery cell in another embodiment of the present application;

[0025] Figure 6 The front view of the adapter of the battery cell in yet another embodiment of the present application.

[0026] Reference numerals in the drawings:

[0027] 1. Battery cell;

[0028] 10. Outer shell; 20. Terminal; 30. Adapter; 40. First insulating member; 50. Second insulating member; 60. Sealing member;

[0029] 11. Housing; 12. End cover; 122. Mounting hole;

[0030] 21. First conductive part; 22. Second conductive part;

[0031] 31. First transfer part; 32. Second transfer part; 33. Edge area; 331. First edge area; 332. Second edge area;

[0032] X. Length direction; Y. Width direction; Z. Thickness direction. Detailed implementation manners

[0033] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0037] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0038] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0039] Currently, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, electric vehicles, as well as in many fields such as military equipment and aerospace. With the continuous expansion of the application fields of batteries, the market demand is also constantly increasing.

[0040] The battery includes a plurality of battery cells. When a thermal runaway occurs in the battery, the temperature inside the battery rapidly rises to a very high temperature, causing the insulating member on the side of the end cap of the battery cell facing the housing to melt and lose its insulating effect. At the same time, the end cap is deformed under the influence of heat and the internal air pressure of the battery cell, resulting in the contact between the end cap and the adapter and forming a short circuit, and even sparking. Continuous sparking will penetrate the end cap and cause the battery to burn, which will cause serious harm to the safety of the battery.

[0041] Please refer to Figures 1 to 3 , in order to alleviate the above problems, through in-depth research, the applicant has designed a battery cell 1. The battery cell 1 includes a housing 10, a pole column 20, an adapter 30, an electrode assembly and a first insulating member 40. The housing 10 includes a housing 11 and an end cap 12. The end cap 12 is provided with an installation hole 122 penetrating in the thickness direction Z thereof. The pole column 20 includes a first conductive portion 21 and a second conductive portion 22 protruding from one side of the first conductive portion 21. The first conductive portion 21 is located on the side of the end cap 12 facing the housing 11, and the second conductive portion 22 passes through the installation hole 122. The adapter 30 is located on the side of the pole column 20 facing the housing 11, and includes a first adapter portion 31 and a second adapter portion 32. The first adapter portion 31 is stacked with the first conductive portion 21 and is electrically connected to the first conductive portion 21. The second adapter portion 32 extends out of the first conductive portion 21 along the length direction X of the end cap 12. Among them, the end cap 12 has an easy-to-spark area corresponding to the adapter 30. In the thickness direction Z of the end cap 12, the orthographic projection of the easy-to-spark area falls outside the orthographic projection of the second adapter portion 32, and / or the distance between the end cap 12 and the second adapter portion 32 is L, 0.8 mm ≤ L ≤ 6.5 mm. The electrode assembly is received in the housing 11, and the tab of the electrode assembly is electrically connected to the first adapter portion 31 or the second adapter portion 32 of the adapter 30. The first insulating member 40 is disposed between the end cap 12 and the first conductive portion 21.

[0042] Among them, the outer shell 10 refers to the component that isolates the internal environment of the battery cell 1 from the external environment. The housing 11 can be a hollow structure with one end open and one end closed, or it can also be a hollow structure with both ends open. The number of end caps 12 is the same as and corresponds one by one to the number of openings of the housing 11, and the end cap 12 covers the corresponding opening of the housing 11. Optionally, the housing 11 and the end cap 12 can both be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 12 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 1 to have higher structural strength and improved safety performance.

[0043] The pole column 20 passes through the mounting hole 122 on the end cap 12 and is connected to the end cap 12 by means such as injection molding connection and riveting. In addition, the pole column 20 is also connected to the ear of the electrode assembly through the adapter 30 for outputting or inputting the electric energy of the battery cell 1. There are usually two pole columns 20, one is the positive pole column and the other is the negative pole column. When the housing 11 is a hollow structure with one end open and one end closed, and the end cap 12 is one and covers the opening of the housing 11, the positive pole column and the negative pole column are arranged on the same end cap 12. When the housing 11 is a hollow structure with both ends open, and the end caps 12 are two and respectively cover the corresponding openings of the housing 11, the positive pole column and the negative pole column are respectively arranged on the two end caps 12.

[0044] For the convenience of description, the following embodiments will be described by taking the housing 11 as a hollow structure with one end open and one end closed, and the positive pole column and the negative pole column are both arranged on the same end cap 12 as an example. In this embodiment, two mounting holes 122 are opened on the end cap 12. The first conductive parts 21 of the positive pole column and the negative pole column are both located on the side of the end cap 12 facing the housing 11. The second conductive part 22 of the positive pole column passes through one of the mounting holes 122, and the second conductive part 22 of the negative pole column passes through the other mounting hole 122.

[0045] The electrode assembly is the component in the battery cell 1 where the electrochemical reaction occurs. The electrode assembly is mainly formed by winding or laminating the positive electrode sheet and the negative electrode sheet, and usually a separator is provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with the active material constitute the main body part of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without the active material respectively constitute the ears. The positive ear and the negative ear can be located at one end of the main body part together or at both ends of the main body part respectively. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the ears are connected to the pole column 20 through the adapter 30 to form a current loop.

[0046] The adapter 30 is a conductive component in the battery cell 1 for electrically connecting the terminal post 20 and the tab. The adapter 30 is located on the side of the terminal post 20 facing the housing 11 and is fixedly connected to the terminal post 20. The number of adapters 30 is the same as that of the terminal posts 20 and they correspond one by one. Specifically, there are two adapters 30, namely the positive adapter and the negative adapter. The positive adapter is used to electrically connect the positive tab and the positive terminal post, and the negative adapter electrically connects the negative tab and the negative terminal post. Specifically, the first connecting portion 31 of the adapter 30 is electrically connected to the terminal post 20, and the second connecting portion 32 of the adapter 30 is electrically connected to the tab. Alternatively, both sides of the first connecting portion 31 of the adapter 30 are respectively electrically connected to the terminal post 20 and the tab.

[0047] The first insulating member 40 is used to insulatively connect the first conductive portion 21 of the terminal post 20 and the end cover 12 to prevent the end cover 12 from contacting the terminal post 20 and causing a short circuit. Taking the housing 11 as a hollow structure with one end open and the other end closed, and the positive terminal post and the negative terminal post are both arranged on the same end cover 12 as an example, the first insulating member 40 is insulatively connected between the first conductive portion 21 of the positive terminal post and the end cover 12, and between the first conductive portion 21 of the negative terminal post and the end cover 12.

[0048] Among them, when the battery undergoes thermal runaway, causing the first insulating member 40 to melt, and the internal air pressure of the battery cell 1 increases and expands, resulting in an area on the end cover 12 that is prone to deformation and contact with the second connecting portion 32 of the adapter 30, this area is the prone-to-spark area on the end cover 12 corresponding to the adapter 30.

[0049] To facilitate the comparison of whether the orthographic projection of the prone-to-spark area falls inside or outside the orthographic projection of the second connecting portion 32, the plane where the surface of the adapter 30 facing the housing 11 is located can be used as a reference plane. The prone-to-spark area and the second connecting portion 32 are both orthographically projected onto this reference plane along the thickness direction Z of the end cover 12. And if the orthographic projections of the prone-to-spark area and the second connecting portion 32 on the reference plane do not overlap, it indicates that the orthographic projection of the prone-to-spark area in the thickness direction Z of the end cover 12 falls outside the orthographic projection of the second connecting portion 32.

[0050] In the present application, the orthographic projection of the easy-to-ignite area in the thickness direction Z of the end cap 12 falls outside the orthographic projection of the second adapter portion 32. Therefore, when the first insulating member 40 melts and the end cap 12 deforms under the influence of high temperature and the air pressure inside the battery cell 1, the easy-to-ignite area of the end cap 12 is also less likely to contact the second adapter portion 32 of the adapter 30, thereby reducing the risk of short circuit due to the contact between the end cap 12 and the adapter 30. The distance between the end cap 12 and the second adapter portion 32 is L, where 0.8 mm ≤ L ≤ 6.5 mm. In this way, there is a relatively safe spacing range between the easy-to-ignite area and the second adapter portion 32. Even if the end cap 12 deforms, it is less likely for the end cap 12 to contact the second adapter portion 32 of the adapter 30, thereby reducing the risk of contact and short-circuit ignition between the end cap 12 and the second adapter portion 32 of the adapter 30 and improving the safety of the battery.

[0051] Please refer again to Figure 1 and simultaneously refer to Figure 5 In some alternative embodiments, the second adapter portion 32 has an edge area 33 disposed along the width direction Y of the end cap 12. The easy-to-ignite areas correspond one-to-one with the edge area 33. In the thickness direction Z of the end cap 12, the orthographic projection of the easy-to-ignite area in the thickness direction Z of the end cap 12 falls outside the orthographic projection of the corresponding edge area 33, thereby reducing the risk of contact and short-circuit ignition between the end cap 12 and the second adapter portion 32 of the adapter 30 when the end cap 12 deforms and improving the safety of the battery.

[0052] Specifically, the outer edge portion of the end cap 12 has a large degree of curvature and is more likely to come into contact with the adapter 30 and form an easy-to-ignite area.

[0053] Specifically, the second adapter portion 32 has a first edge area 331 and a second edge area 332 disposed at intervals along the width direction Y of the end cap 12. There are two easy-to-ignite areas on the end cap 12, namely the first easy-to-ignite area and the second easy-to-ignite area. The first easy-to-ignite area corresponds to the first edge area 331, and the second easy-to-ignite area corresponds to the second edge area 332. In the thickness direction Z of the end cap 12, the orthographic projection of the first easy-to-ignite area falls outside the orthographic projection of the second adapter portion 32 but is close to the orthographic projection of the first edge area 331 along the width direction Y of the end cap 12, and the orthographic projection of the second easy-to-ignite area falls outside the orthographic projection of the second adapter portion 32 but is close to the orthographic projection of the second edge area 332 along the width direction Y of the end cap 12.

[0054] Please refer again to Figure 1 and simultaneously refer to Figure 4 In some alternative embodiments, the first adapter portion 31 protrudes towards the end cap 12 relative to the second adapter portion 32, and the protruding height is L1, where 1 mm ≤ L1 ≤ 3 mm.

[0055] For the traditional adapter 30, the surfaces of the first adapter portion 31 and the second adapter portion 32 of the adapter 30 facing the pole 20 are flush, and the surfaces of the first adapter portion 31 and the second adapter portion 32 of the adapter 30 facing away from the pole 20 are also flush. In this application, by setting the first adapter portion 31 to protrude in the direction towards the end cap 12 relative to the second adapter portion 32. For example, compared with the traditional adapter 30, the total thickness of the second adapter portion 32 can remain unchanged, while the first adapter portion 31 protrudes relative to the second adapter portion 32, and the protruding height is L1, where 1 mm ≤ L1 ≤ 3 mm. This method is equivalent to increasing the safety distance between the second adapter portion 32 and the end cap 12 by increasing the thickness of the first adapter portion 31. In this case, even if the end cap 12 deforms during thermal runaway, it is difficult to contact the first adapter 30, achieving the purpose of improving safety.

[0056] It is worth mentioning that due to the influence of the space inside the battery cell 1, the protruding height of the first adapter portion 31 should not be too large.

[0057] In some alternative embodiments, the first adapter portion 31 protrudes in the direction towards the end cap 12 relative to the second adapter portion 32, and the total thickness of the first adapter portion 31 is L2, where 1.5 mm ≤ L2 ≤ 3.5 mm. The total thicknesses of the traditional first adapter portion 31 and the second adapter portion 32 are equal and are both in the range of 0.5 mm to 2 mm. By designing the first adapter portion 31 to protrude in the direction towards the end cap 12 relative to the second adapter portion 32, and the total thickness of the first adapter portion 31 is L2, where 1.5 mm ≤ L2 ≤ 3.5 mm. After the first adapter portion 31 with this thickness range is electrically connected to the pole 20, the distance between the second adapter portion 32 and the end cap 12 increases, having a suitable safety distance. Therefore, even if the end cap 12 deforms during thermal runaway, it is difficult to contact the second adapter portion 32, further improving the safety of the battery.

[0058] Please refer to again Figure 1 and at the same time refer to Figure 5 In some alternative embodiments, the width of the second adapter portion 32 in the width direction Y of the end cap 12 is L3, where 35 mm ≤ L3 ≤ 45 mm.

[0059] For the traditional adapter 30, the width of the second adapter portion 32 of the adapter 30 in the width direction Y of the end cap 12 is usually in the range of 52.5 mm to 57.5 mm. Such a width range is likely to cause the orthographic projection of the easy-to-fire area to fall within the orthographic projection range of the edge area 33 of the second adapter portion 32. In this application, by designing the width of the second adapter portion 32 in the width direction Y of the end cap 12 as L3, where 35 mm ≤ L3 ≤ 45 mm, it is equivalent to the edge area 33 of the second adapter portion 32 in this application being retracted inward relative to the edge area 33 of the second adapter portion 32 of the traditional adapter 30, so as to achieve clearance between the edge area 33 of the second adapter portion 32 in this application and the easy-to-fire area. Therefore, when thermal runaway occurs and the end cap 12 deforms, even if the easy-to-fire area on the end cap 12 deforms, it is difficult to contact the second adapter portion 32, improving the safety of the battery.

[0060] Please refer again to Figure 1 and, at the same time, refer to Figure 6 In some alternative embodiments, the second adapter portion 32 is retracted inward relative to the first adapter portion 31 in a direction away from the end cap 12, and the retraction distance is L4, where 0.3 mm ≤ L4 ≤ 1 mm. For the traditional adapter 30, the surfaces of the first adapter portion 31 and the second adapter portion 32 of the adapter 30 facing the pole 20 are flush, and the surfaces of the first adapter portion 31 and the second adapter portion 32 of the adapter 30 facing away from the pole 20 are also flush. In this application, by setting the second adapter portion 32 to be retracted inward relative to the first adapter portion 31 in a direction away from the end cap 12. For example, compared with the traditional adapter 30, the total thickness of the first adapter portion 31 can remain unchanged, while the second adapter portion 32 is retracted relative to the first adapter portion 31, and the retraction distance is L4, where 0.3 mm ≤ L4 ≤ 1 mm. This method is equivalent to increasing the safety distance between the second adapter portion 32 and the end cap 12 by thinning the second adapter portion 32. In this case, even if the end cap 12 deforms during thermal runaway, it is difficult to contact the second adapter portion 32, achieving the purpose of improving safety.

[0061] It is worth mentioning that to ensure the strength of the adapter 30, the thickness of the retracted second adapter portion 32 should not be too large.

[0062] In some alternative embodiments, the second adapter portion 32 is recessed relative to the first adapter portion 31 in a direction away from the end cap 12, and the total thickness of the second adapter portion 32 is L5, where 0.2 mm ≤ L5 ≤ 1 mm. The second adapter portion 32 being recessed relative to the first adapter portion 31 in a direction away from the end cap 12 increases the distance between the second adapter portion 32 and the end cap 12, thereby reducing the risk of contact between the end cap 12 and the second adapter portion 32 when the end cap 12 deforms. And the total thickness of the second adapter portion 32 is L5, where 0.2 mm ≤ L5 ≤ 1 mm. While ensuring a relatively large distance between the second adapter portion 32 and the end cap 12, it can also maintain the mechanical strength of the second adapter portion 32 to reduce the risk of deformation of the adapter member 30.

[0063] Please refer to again Figures 1 to 3 , in some alternative embodiments, the battery cell 1 further includes a second insulating member 50. The second insulating member 50 is sleeved outside the second conductive portion 22 and is used for insulatingly connecting the second conductive portion 22 and the end cap 12 to prevent the end cap 12 from coming into contact with the second conductive portion 22 and conducting electricity, thereby ensuring the safety of the battery cell 1 during use.

[0064] Wherein, the number of the second insulating members 50 is the same as and corresponds one-to-one to the number of the electrode terminals 20.

[0065] In some alternative embodiments, the battery cell 1 further includes a sealing member 60. The sealing member 60 is at least partially located in the mounting hole 122 and is used for sealing the gap between the hole wall of the mounting hole 122 and the second conductive portion 22. The sealing member 60 can seal the gap between the hole wall of the mounting hole 122 and the second conductive portion 22 passing through the corresponding mounting hole 122 to prevent the electrolyte, gas, etc. in the housing 11 from leaking to the outside through this gap.

[0066] Wherein, the number of the sealing members 60 is the same as and corresponds one-to-one to the number of the electrode terminals 20.

[0067] This application also provides a battery. The battery includes the battery cell 1 as described in any one of the above embodiments. Among them, the battery includes a plurality of battery cells 1, and the battery cells 1 can be connected in series, parallel, or in a mixed connection manner.

[0068] The battery in this application has the effects of any one of the above embodiments, so it will not be elaborated here.

[0069] This application also provides an electrical device, which includes the battery as described in any one of the above embodiments, and the battery is used to provide electrical energy.

[0070] The battery in this application has the effects described in any one of the above embodiments, so it will not be elaborated here.

[0071] Among them, the electrical device may be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, and so on. Among them, the electric toys may include stationary or mobile electric toys. For example, game consoles, electric vehicle toys, electric ship toys, electric aircraft toys, and so on. The spacecraft may include airplanes, rockets, space shuttles, spaceships, and so on.

[0072] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the electrical devices described above.

[0073] In the above-mentioned battery cell 1, battery and electrical device, the positive projection of the easily ignitable area in the thickness direction Z of the end cap 12 falls outside the positive projection of the second connection part 32. Therefore, when the first insulating part 40 melts and the end cap 12 deforms under the influence of high temperature and the air pressure inside the battery cell 1, the easily ignitable area of the end cap 12 is also less likely to contact the second connection part 32 of the connection part 30, thereby reducing the risk of short circuit due to the contact between the end cap 12 and the connection part 30. The distance between the end cap 12 and the second connection part 32 is L, and 0.8mm ≤ L ≤ 6.5mm. In this way, there is a relatively safe spacing range between the easily ignitable area and the second connection part 32. Even if the end cap 12 deforms, it is less likely for the end cap 12 to contact the second connection part 32 of the connection part 30, thereby reducing the risk of short circuit and ignition due to the contact between the end cap 12 and the second connection part 32 of the connection part 30, and improving the safety of the battery.

[0074] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0075] The above-mentioned embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A battery cell, characterized in that, The battery cell includes: A housing (10), including a housing body (11) and an end cap (12), wherein the end cap (12) is provided with a mounting hole (122) penetrating along its thickness direction (Z); A pole column (20), including a first conductive part (21) and a second conductive part (22) protruding from one side of the first conductive part (21), the first conductive part (21) is located on the side of the end cap (12) facing the housing body (11), and the second conductive part (22) passes through the mounting hole (122); An adapter (30), located on the side of the pole column (20) facing the housing body (11), and including a first adapter part (31) and a second adapter part (32), the first adapter part (31) is stacked with the first conductive part (21) and electrically connected to the first conductive part (21), and the second adapter part (32) extends out of the first conductive part (21) along the length direction (X) of the end cap (12); Wherein, the end cap (12) has an easy-to-spark area corresponding to the adapter (30), and in the thickness direction (Z) of the end cap (12), the orthographic projection of the easy-to-spark area falls outside the orthographic projection of the second adapter part (32), and / or, the distance between the end cap (12) and the second adapter part (32) is L, 0.8mm ≤ L ≤ 6.5mm.

2. The battery cell according to claim 1, characterized in that The second adapter part (32) has an edge area (33) arranged along the width direction (Y) of the end cap (12), the easy-to-spark area corresponds to the edge area (33) one by one, and in the thickness direction (Z) of the end cap (12), the orthographic projection of the easy-to-spark area falls outside the orthographic projection of the corresponding edge area (33).

3. The battery cell according to claim 1, characterized in that, The first adapter part (31) protrudes towards the end cap (12) relative to the second adapter part (32), and the protruding height is L1, 1mm ≤ L1 ≤ 3mm.

4. The battery cell according to claim 3, characterized in that, The first adapter part (31) protrudes towards the end cap (12) relative to the second adapter part (32), and the total thickness of the first adapter part (31) is L2, 1.5mm ≤ L2 ≤ 3.5mm.

5. The battery cell according to claim 1, characterized in that, The width of the second adapter part (32) in the width direction (Y) of the end cap (12) is L3, 35mm ≤ L3 ≤ 45mm.

6. The battery cell according to claim 1, characterized in that, The second adapter part (32) is retracted away from the end cap (12) relative to the first adapter part (31), and the retracted distance is L4, 0.3mm ≤ L4 ≤ 1mm.

7. The battery cell according to claim 6, characterized in that, The second adapter part (32) is retracted away from the end cap (12) relative to the first adapter part (31), and the total thickness of the second adapter part (32) is L5, 0.2mm ≤ L5 ≤ 1mm.

8. The battery cell according to claim 1, characterized in that, It further includes a seal (60), at least part of the seal (60) is located in the mounting hole (122), and is used for sealing and connecting the second conductive part (22) and the end cap (12).

9. A battery, characterized in that, It includes the battery cell according to any one of the above claims 1 to 8.

10. An electrical device, comprising the battery as described in claim 9 above, characterized in that, The battery is used to provide electrical energy.

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