Battery monomer, battery and electric device

Abstract

The utility model belongs to the technical field of battery insulation, and particularly relates to a single battery, a battery and a power utilization device, the battery unit comprises a shell and an insulating part, the shell comprises a shell body and an end cover, and the end cover covers an opening of the shell body; the outer surface of the shell comprises an insulating coating area and a non-insulating coating area, the non-insulating coating area is located at the joint of the end cover and the shell, and the insulating coating area is covered with an insulating coating; the insulating part covers at least part of the non-insulating coating area, so that the insulating part covers at least part of the non-insulating coating area, the short circuit risk caused by the non-insulating coating area can be reduced, the insulating use reliability of the battery monomer adopting the insulating coating can be improved, and the use reliability of the battery applying the battery monomer can be improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] A battery usually includes one or more battery cells. How to improve the insulation reliability of battery cells is a technical problem that needs to be solved urgently in battery technology. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a battery cell, a battery and an electrical device. The technical solution provided in the present application can improve the insulation reliability of the battery cell.

[0005] The technical solution adopted in the embodiment of the present application is:

[0006] In a first aspect, a battery cell is provided, which includes an outer shell and an insulating member, the outer shell includes a shell and an end cover, the end cover is covered at the opening of the shell; the outer surface of the outer shell includes an insulating coating area and a non-insulating coating area, the non-insulating coating area is located at the connection between the end cover and the shell, and the insulating coating area is covered with an insulating coating; the insulating member covers at least a portion of the non-insulating coating area.

[0007] The battery cell of the embodiment of the present application has an outer shell comprising a shell and an end cover. During assembly, the end cover is placed on the opening of the shell, and then the end cover is welded to the opening of the shell to realize the assembly of the battery cell. The outer surface of the shell comprises an insulating coating area and an insulating coating-free area. The insulating coating-free area is located at the connection between the end cover and the shell, so that there is no insulating coating at the welding connection between the shell and the end cover, which reduces the influence of the insulating coating on the welding quality and is beneficial to improving the welding quality. The insulating coating area is coated with an insulating coating, and the insulating part is used to cover at least part of the area without the insulating coating, so that the battery cell has better insulation performance. In addition, the insulating part covers at least part of the area without the insulating coating, so that the insulating part covers at least part of the area without the insulating coating, which can reduce the short circuit risk caused by the area without the insulating coating, which is beneficial to improving the insulation reliability of the battery cell using the insulating coating, and improving the reliability of the battery using the battery cell.

[0008] In some embodiments, the side of the housing adjacent to other battery cells is a first side; the insulating member includes a first insulating portion, and the first insulating portion covers a non-insulating coating area on the first side.

[0009] By adopting the technical solution of this embodiment, the first insulating part covers the non-insulating coating area of ​​the first side surface. The first insulating part and the insulating coating cooperate to achieve full-surface insulation of the first side surface. The battery cell has good insulation performance. The first insulating part can also separate the non-insulating coating areas of two adjacent battery cells, so that the battery cells have good insulation effect, which is beneficial to improving the reliability of battery use.

[0010] In some embodiments, the size of the first insulating portion in the first direction is H1, and the size of the non-insulating coating area on the first side in the first direction is H2, wherein H1≥H2, and the first direction is the distribution direction of the insulating coating area and the non-insulating coating area on the first side.

[0011] By adopting the technical solution of this embodiment, in the first direction, the first insulating part can completely cover the non-insulating coating area of ​​the first side, which can further improve the insulation reliability of the battery cell and the insulation reliability between two adjacent battery cells, which is beneficial to improving the reliability of battery use.

[0012] In some embodiments, 1.05≤H1 / H2≤1.3.

[0013] By adopting the technical solution of this embodiment, the design of 1.05≤H1 / H2≤1.3, the size of the first insulating part in the first direction is reasonably designed, so that on the basis of good insulation reliability of the battery cell, the first insulating part can better avoid the expansion of the first side surface, which is beneficial to improving the performance of the battery cell, and can also reduce material waste, reduce the production cost of insulating parts, and is also beneficial to improving the battery. It is beneficial to improve the energy density of the battery.

[0014] In some embodiments, 1.1≤H1 / H2≤1.2.

[0015] By adopting the technical solution of this embodiment, the design of 1.1≤H1 / H2≤1.2, the size design of the first insulating part in the first direction is more reasonable, the insulation reliability of the battery cell can be designed to be better, the first insulating part can better avoid the expansion of the first side surface, which is beneficial to improve the performance of the battery cell, better reduce material waste, and is more conducive to reducing the production cost of the battery cell, and is more conducive to improving the energy density of the battery.

[0016] In some embodiments, a dimension of the first insulating portion in the first direction is H1, wherein 1 mm≤H1≤15 mm, and the first direction is a distribution direction of the insulating coating area and the non-insulating coating area in the first side surface.

[0017] By adopting the technical solution of this embodiment, the design of 1mm≤H1≤15mm can make the first insulating part completely cover the non-insulating coating area on the first side of most battery cells in the first direction, so that most battery cells have good insulation performance; in addition, the size of the first insulating part in the first direction is reasonably designed, which can reduce material waste and help reduce the production cost of battery cells.

[0018] In some embodiments, 1.5 mm ≤ H1 ≤ 12 mm.

[0019] By adopting the technical solution of this embodiment, the design of 1.5mm≤H1≤12mm can better balance the insulation reliability of the battery cell and the production cost of the battery cell, which is beneficial to improving the comprehensive performance of the battery cell.

[0020] In some embodiments, the dimension of the first insulating portion in the second direction is L1, and the dimension of the non-insulating coating area of ​​the first side surface in the second direction is L2, wherein L1≥L2, the second direction is perpendicular to the first direction, and the second direction is parallel to the first side surface.

[0021] By adopting the technical solution of this embodiment, the first insulating part can completely cover the non-insulating coating area of ​​the first side in the second direction and the first direction, which can better improve the insulation reliability of the battery cell and the insulation reliability between two adjacent battery cells, which is beneficial to improving the reliability of battery use.

[0022] In some embodiments, 0.1 mm≤L1-L2≤4 mm.

[0023] By adopting the technical solution of this embodiment, the design of 0.1mm≤L1-L2≤4mm, on the basis of the good insulation performance of the battery cell, the size of the first insulating part protruding from the battery cell in the second direction is reasonable, and the battery cells can be tightly assembled together, thereby improving the space utilization of the battery and the volume energy density of the battery.

[0024] In some embodiments, 1 mm ≤ L1 - L2 ≤ 3 mm.

[0025] By adopting the technical solution of this embodiment, the design of 1mm≤L1-L2≤3mm, the size design of the first insulating part in the second direction is more reasonable, the battery cells can have better insulation performance, and the battery cells can be more tightly assembled together, which better improves the space utilization of the battery and improves the volume energy density of the battery.

[0026] In some embodiments, an edge of the first insulating portion close to the end cover is flush with an end surface of the end cover facing away from the housing.

[0027] By adopting the technical solution of this embodiment, the first insulating portion does not protrude from the end cover, which can reduce the risk of interference with other mounting components (such as patches, etc.) on the end cover, thereby facilitating the assembly of multiple battery cells.

[0028] In some embodiments, the insulating part also includes a second insulating part and a third insulating part, the second insulating part is connected to one end of the first insulating part, and the third insulating part is connected to the other end of the second insulating part, the second insulating part and the third insulating part respectively cover the opposite two sides of the insulating coating on the first side, and the first insulating part, the second insulating part and the second insulating part are surrounded to form a hollow area.

[0029] By adopting the technical solution of this embodiment, the first insulating part and the second insulating part can increase the connection area between the outer shell and the insulating member, so that the insulating member can be stably fixed between two adjacent battery cells, which is beneficial to improving the insulation reliability between the battery cells; the second insulating part and the third insulating part can cover the insulating coating on the first side, which can improve the insulation reliability of the insulating coating area; in addition, during the charge and discharge process of the battery cell, the outer shell of the battery cell will expand toward the hollow area, and the hollow area can provide expansion space for the battery cell, which is beneficial to improving the performance of the battery cell and the performance of the battery.

[0030] In some embodiments, the insulating member also includes a fourth insulating portion, one end of the fourth insulating portion is connected to the end of the second insulating portion facing away from the first insulating portion, the other end of the fourth insulating portion is connected to the end of the third insulating portion facing away from the first insulating portion, and the first insulating portion, the second insulating portion, the third insulating portion and the fourth insulating portion are surrounded to form a hollow area.

[0031] By adopting the technical solution of this embodiment, the first insulating part, the second insulating part, the third insulating part and the fourth insulating part are arranged to form a closed frame structure. The insulating part has good structural strength and can be stably and reliably fixed between battery cells, which is beneficial to improving the insulation reliability between battery cells and the reliability of battery use.

[0032] In some embodiments, a distance between an edge of the fourth insulating portion facing away from the first insulating portion and a surface of the shell facing away from the end cover is L3, wherein 0 mm ≤ L3 ≤ 10 mm.

[0033] By adopting the technical solution of this embodiment, the design of 0mm≤L3≤10mm ensures that the fourth insulating part does not protrude from the surface of the shell facing away from the end cover, so that the battery cell can be stably installed in the battery box; in addition, the distance between the edge of the fourth insulating part facing away from the first insulating part and the surface of the shell facing away from the end cover is not too large, and the hollow area can reserve a larger space for the expansion of the battery cell, which is beneficial to improving the performance of the battery cell and the performance of the battery.

[0034] In some embodiments, 1 mm ≤ L3 ≤ 5 mm.

[0035] By adopting the technical solution of this embodiment, the design of 1mm≤L3≤5mm allows a certain distance between the fourth insulating part and the surface of the shell facing away from the end cover. When the insulating part is located between the shells of two adjacent battery cells, external parts are not easy to contact the fourth insulating part, thereby reducing the risk of damage. In addition, the fourth insulating part is far from the center of the first side surface, and the hollow area can reserve a larger space for the expansion of the battery cell, which is conducive to better improving the performance of the battery cell and improving the performance of the battery.

[0036] In some embodiments, the first insulating portion and the fourth insulating portion are symmetrically arranged.

[0037] By adopting the technical solution of this embodiment, the first insulating part and the fourth insulating part adopt the same structure and size, and the fourth insulating part and the first insulating part can be used interchangeably. In this way, during assembly, the insulating parts do not need to distinguish between the first insulating part and the fourth insulating part, and the assembly operation is simpler and the assembly efficiency is high.

[0038] In some embodiments, the second insulating portion includes a first insulating segment and a second insulating segment, the first insulating segment is connected to the first insulating portion, the second insulating segment is connected to the fourth insulating portion, and the first insulating segment and the second insulating segment are spaced apart and distributed along a first direction, wherein the first direction is the distribution direction of the insulating coating area and the non-insulating coating area in the first side surface; and / or, the third insulating portion includes a third insulating segment and a fourth insulating segment, the third insulating segment is connected to the first insulating portion, the fourth insulating segment is connected to the fourth insulating portion, and the third insulating segment and the fourth insulating segment are spaced apart and distributed along the first direction, wherein the first direction is the distribution direction of the insulating coating area and the non-insulating coating area in the first side surface.

[0039] By adopting the technical solution of this embodiment, the amount of material used for the insulating member can be reduced, the manufacturing cost of the insulating member can be reduced, and the manufacturing cost of the battery cell can be reduced.

[0040] In some embodiments, the first side surface is the side surface of the battery cell having the largest area.

[0041] By adopting the technical solution of this embodiment, the area of ​​the first side is the largest, and the corresponding area of ​​the non-insulating coating area of ​​the first side is also the largest. The risk of insulation failure on the first side is the highest. The non-insulating coating area of ​​the first side is covered with an insulating part, which can effectively reduce the risk of insulation failure and effectively improve the insulation performance of the battery cell.

[0042] In some embodiments, a dimension of the insulating member in the third direction is H3, wherein 1 mm≤H3≤5 mm, and the third direction is perpendicular to the first side surface.

[0043] By adopting the technical solution of this embodiment, multiple battery cells are arranged along the third direction, and an insulating member is provided between the outer shells of two adjacent battery cells. The dimension of the insulating member in the third direction is H3 and 1mm≤H3≤5mm, so that the insulating member has a certain thickness, and the two adjacent battery cells have good insulation performance; the distance between the outer shells of two adjacent battery cells is not too large, which improves the space utilization rate in the battery, which is beneficial to improving the volume energy density of the battery.

[0044] In some embodiments, 3 mm ≤ H3 ≤ 4 mm.

[0045] By adopting the technical solution of this embodiment, the design of 3mm≤H3≤4mm and the reasonable setting of the thickness of the insulating member can better take into account the insulation performance between battery cells and the volume energy density of the battery.

[0046] In some embodiments, the insulating member is fixedly connected to the housing.

[0047] By adopting the technical solution of this embodiment, the insulating part is fixedly connected to the outer shell, the insulating part can stably shield the area without insulating coating, and the insulation reliability of the battery cell is good; after multiple battery cells are grouped, the insulating part is not easy to move, and the battery cell can stably separate the area without insulating coating of two adjacent battery cells, so that the battery cells have better insulation performance, which is beneficial to improving the reliability of battery use.

[0048] In some embodiments, the insulator is bonded to the housing.

[0049] By adopting the technical solution of this embodiment, the insulating member is bonded to the housing, and the fixing operation is simple, which is conducive to improving production efficiency.

[0050] In some embodiments, the insulating member includes at least one of an insulating film or an insulating sheet.

[0051] By adopting the technical solution of this embodiment, the insulating part has a simple structure and is easy to process and manufacture, which is beneficial to reducing the manufacturing cost of the insulating part.

[0052] In a second aspect, a battery is provided, comprising the battery cell as described in the above embodiment.

[0053] The battery of the embodiment of the present application adopts the above-mentioned battery cell, and the insulation performance of the battery cell is good, which is beneficial to improving the reliability of the battery.

[0054] In some embodiments, the battery includes a plurality of battery cells, and an insulating member is disposed between housings of two adjacent battery cells.

[0055] By adopting the technical solution of this embodiment, the insulating component can achieve insulation of the non-insulating coating area of ​​two adjacent battery cells, and cooperate with the insulating coating to effectively improve the insulation reliability between battery cells and better improve the reliability of battery use.

[0056] In a third aspect, an electrical device is provided, comprising the battery as described in the above embodiment.

[0057] The electrical device of the embodiment of the present application adopts the above-mentioned battery, which has good reliability in use and is conducive to improving the performance of the electrical device.

[0058] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0060] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0061] Figure 2 An exploded view of a battery provided for some embodiments of the present application.

[0062] Figure 3 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application.

[0063] Figure 4 for Figure 3 Schematic diagram of the exploded structure of a battery cell is shown.

[0064] Figure 5 A schematic structural diagram of a battery cell from one perspective provided in some other embodiments of the present application.

[0065] Figure 6 for Figure 5 Schematic diagram of the exploded structure of a battery cell is shown.

[0066] Figure 7 for Figure 5 Schematic diagram of the assembly of multiple battery cells shown.

[0067] Figure 8 for Figure 5A schematic structural diagram of a battery cell from another perspective is shown.

[0068] Fig. 9 This is a schematic diagram of the structure of a battery cell provided in some other embodiments of the present application.

[0069] Fig.10 for Fig. 9 Schematic diagram of the exploded structure of a battery cell is shown.

[0070] Among them, the reference numerals in the figure are:

[0071] 1000, vehicle; 1100, battery; 1200, controller; 1300, motor; 10, housing; 11, first part; 12, second part; 20, battery cell; 21, outer shell; 211, end cap; 2111, electrode terminal; 2112, pressure relief mechanism; 212, shell; 213, insulating coating area; 214, non-insulating coating area; 215, first side; 22, insulating member; 221, first insulating portion; 222, second insulating portion; 2221, first insulating segment; 2222, second insulating segment; 223, third insulating portion; 2231, third insulating segment; 2232, fourth insulating segment; 224, fourth insulating portion; 225, hollow area; 23, electrode assembly. DETAILED DESCRIPTION

[0072] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0074] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0075] Reference to "embodiments" herein means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least some embodiments of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0076] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0077] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces). "Several" means one or more than one, unless otherwise clearly and specifically defined.

[0078] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0079] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0080] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0081] In the present application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells or magnesium-ion battery cells, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0082] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells to a certain extent.

[0083] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0084] The development of battery technology must consider multiple design factors at the same time, such as battery life, energy density, discharge capacity, charge and discharge rate and other performance parameters. In addition, the insulation reliability of battery cells must also be considered. However, the insulation reliability of current battery cells is poor.

[0085] For battery cells, in order to ensure the insulation reliability of the battery cells, a layer of insulating film (for example: blue film) is generally wrapped outside the shell of the battery cell, and a layer of patch is attached to the end cover. Depending on the coating method, there are folds in the multi-layer insulating film area outside the shell, and the folds are weak insulation locations, which can easily cause insulation breakdown under certain working conditions, posing a short circuit risk.

[0086] In order to solve the problem of insulation breakdown caused by creases, it is proposed to coat a layer of insulating coating made of insulating materials such as polyimide and epoxy resin on the outside of the shell to replace the insulating film.

[0087] However, in the actual production process of battery cells, laser welding is required between the end cap and the shell. In order to prevent the insulating coating from affecting the welding quality, a certain area without insulating coating needs to be reserved at the end of the shell near the end cap. The shell without insulating coating is directly exposed to the outside, which poses a risk of short circuit and causes poor insulation reliability of the battery cell.

[0088] Based on this, an embodiment of the present application provides a battery cell, which uses an insulating member to cover at least a portion of the area without insulating coating of the battery cell, so that the insulating member can cover at least a portion of the area without insulating coating, reduce the short circuit risk caused by direct exposure of the area without insulating coating, improve the insulation reliability of the battery cell, and improve the use reliability of the battery using the battery cell.

[0089] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0090] The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. Spacecraft include airplanes, rockets, space shuttles, and spacecrafts, and the like; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices. Batteries may also be energy storage devices. Energy storage devices include energy storage containers, energy storage cabinets, and the like.

[0091] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0092] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1100 is provided inside the vehicle 1000, and the battery 1100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 1100 may be used to power the vehicle 1000, for example, the battery 1100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300, and the controller 1200 is used to control the battery 1100 to power the motor 1300, for example, for starting, navigating and driving the vehicle 1000.

[0093] In some embodiments of the present application, the battery 1100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0094] Please refer to Figure 2 , Figure 2 An exploded view of a battery 1100 provided in some embodiments of the present application. The battery 1100 includes a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0095] In the battery 1100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 1100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 1100 may also include other structures, for example, the battery 1100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0096] Each battery cell 20 may be a secondary battery cell or a primary battery cell, or a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0097] In some embodiments, the battery 1100 may not include the housing 10 , but instead a plurality of battery cells 20 are electrically connected and formed into a whole through necessary fixing structures and then assembled into an electrical device.

[0098] Please refer to Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of a battery cell 20 provided in some embodiments of the present application. Figure 4 for Figure 3 The exploded structure diagram of the battery cell 20 is shown.

[0099] The battery cell 20 refers to the smallest unit constituting the battery 1100. The battery cell 20 includes a housing 21 and an electrode assembly 23. The housing 21 is used to provide an installation environment for the electrode assembly 23; the housing 21 includes an end cap 211 and a shell 212.

[0100] The end cap 211 refers to a component that covers the opening of the shell 212 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 211 can be adapted to the shape of the shell 212 to match the shell 212. Optionally, the end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 211 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 2111 can be provided on the end cap 211. The electrode terminal 2111 can be used to electrically connect to the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20.

[0101] In some embodiments, the end cap 211 may also be provided with a pressure relief mechanism 2112 for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The end cap 211 may also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiments of the present application.

[0102] In some embodiments, an insulating sheet may be provided inside the end cap 211 to isolate the electrical connection components in the housing 212 from the end cap 211 to reduce the risk of short circuit. For example, the insulating sheet may be plastic, rubber, or the like.

[0103] The shell 212 is a component used to cooperate with the end cap 211 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte and other components. The shell 212 and the end cap 211 can be independent components, and an opening can be set on the shell 212, and the end cap 211 is welded to the opening of the shell 212 to form the internal environment of the battery cell 20. The shell 212 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 212 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0104] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 23 may be included in the housing 212. The electrode assembly 23 includes a positive electrode sheet, a negative electrode sheet and a separator. The battery cell 20 mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking the lithium-ion battery 1100 as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode ear. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode ears is multiple and stacked together, and the number of negative electrode ears is multiple and stacked together. The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc.

[0105] The electrode assembly 23 may be a wound structure, that is, the positive electrode sheet, the negative electrode sheet and the separator are wound into a wound structure. The electrode assembly 23 may also be a laminated structure, that is, the positive electrode sheet, the negative electrode sheet and the separator are stacked to form a laminated structure.

[0106] Please refer to Figure 5 and Figure 6 As shown, Figure 5 This is a schematic structural diagram of a battery cell 20 from one perspective provided in some other embodiments of the present application. Figure 6 for Figure 5 The exploded structural diagram of the battery cell 20 is shown.

[0107] An embodiment of the present application provides a battery cell 20, which includes an outer shell 21 and an insulating member 22. The outer shell 21 includes a shell body 212 and an end cover 211, and the end cover 211 is covered at the opening of the shell body 212; the outer surface of the outer shell 21 includes an insulating coating area 213 and a non-insulating coating area 214, and the non-insulating coating area 214 is located at the connection between the end cover 211 and the shell body 212, and the insulating coating area 213 is covered with an insulating coating; the insulating member 22 covers at least a portion of the non-insulating coating area 214.

[0108] The outer surface of the housing 21 may refer to the surface of the housing 21 facing away from its internal environment.

[0109] The insulating coating area 213 may refer to a region where the outer surface of the housing 21 is coated with an insulating coating.

[0110] The non-insulating coating area 214 may refer to an area where the outer surface of the shell 21 is not covered with an insulating coating and is located at the connection between the end cover 211 and the shell 212, so that the connection between the end cover 211 and the shell 212 is not coated with an insulating coating to avoid the influence of the insulating coating on the welding quality, and the end cover 211 and the shell 212 can be better welded together.

[0111] For the convenience of explanation, the dotted line A is used to represent the boundary between the insulating coating area 213 and the non-insulating coating area 214, and the insulating coating area 213 and the non-insulating coating area 214 are divided by the dotted line A; it should be noted that the dotted line A does not represent any structure, but is only for illustration, that is, the dotted line A may not exist in the actual battery cell 20. The dotted line A is arranged around the housing 21, the non-insulating coating area 214 is located on the side of the dotted line A close to the end cover 211, and the insulating coating area 213 is located on the side of the dotted line A away from the end cover 211.

[0112] As an example, when the end cap 211 does not protrude from the opening of the shell 212, the non-insulating coating area 214 includes the area of ​​the outer peripheral surface of the shell 212 close to the end cap 211; when the end cap 211 protrudes from the shell 212 or the end cap 211 is covered on the opening, the non-insulating coating area 214 includes the area of ​​the outer peripheral surface of the shell 212 close to the end cap 211 and the area of ​​the outer peripheral surface of the end cap 211 protruding from the opening. Of course, in other examples, the end surface of the end cap 211 facing away from the shell 212 may be sprayed with an insulating coating, or may not be sprayed with an insulating coating, which can be selected according to the actual use of the battery cell 20.

[0113] The insulating coating may refer to a coating with insulating properties, and the material of the insulating coating may be, but is not limited to, polyimide and epoxy resin. The insulating coating may be covered on the insulating coating area 213 by spraying or the like.

[0114] The insulating member 22 may refer to a component made of insulating material. The insulating member 22 may be an insulating film or an insulating sheet, etc. The material of the insulating member 22 may be PP (polypropylene) or PE (polyethylene) or the like.

[0115] The insulating member 22 covers at least a portion of the non-insulating coating area 214. It can be understood that the entire non-insulating coating area 214 is covered with the insulating member 22; a portion of the non-insulating coating area 214 is covered with the insulating member 22, and another portion of the non-insulating coating area 214 is not covered with the insulating member 22; as an example, the non-insulating coating area 214 on one side of the outer surface of the shell 21 is covered with the insulating member 22.

[0116] The battery cell 20 of the embodiment of the present application has a shell 21 of the battery cell 20 including a shell 212 and an end cover 211. During assembly, the end cover 211 is covered at the opening of the shell 212, and then the end cover 211 is welded to the opening of the shell 212 to realize the assembly of the battery cell 20; and the outer surface of the shell 21 includes an insulating coating area 213 and a non-insulating coating area 214, and the non-insulating coating area 214 is located at the connection between the end cover 211 and the shell 212, so that there is no insulating coating at the welding connection between the shell 212 and the end cover 211, which reduces the insulating coating on the welding quality The effect is beneficial to improving the welding quality; the insulating coating area 213 is coated with an insulating coating, and the insulating member 22 covers at least part of the area without the insulating coating, so that the battery cell 20 has better insulation performance; in addition, the insulating member 22 covers at least part of the area without the insulating coating, so that the insulating member 22 covers at least part of the area without the insulating coating 214, which can reduce the short circuit risk caused by the area without the insulating coating 214, which is beneficial to improving the insulation reliability of the battery cell 20 using the insulating coating, and improving the reliability of the battery 1100 using the battery cell 20.

[0117] Please also read Figure 7 As shown, Figure 7 for Figure 5 FIG. 1 is a schematic diagram of assembling a plurality of battery cells 20 .

[0118] In some embodiments, the side of the housing 21 adjacent to other battery cells 20 is a first side 215 ; the insulating member 22 includes a first insulating portion 221 , and the first insulating portion 221 covers the non-insulating coating area 214 of the first side 215 .

[0119] The first side surface 215 may refer to a side surface of the housing 21 that is used to be adjacent to other battery cells 20 .

[0120] As an example, a plurality of battery cells 20 are arranged in sequence along a third direction to form a battery pack, and the insulating member 22 is located between the outer shells 21 of two adjacent battery cells 20 to achieve insulation between the two battery cells 20. At this time, the first side surface 215 may also refer to the side surface of the outer shell 21 in the third direction; wherein, the two opposite side surfaces of the battery cell 20 in the third direction may both be the first side surfaces 215, and the non-insulating coating area 214 of one of the first side surfaces 215 may be covered with the insulating member 22, and the other first side surface 215 may not be covered with the insulating member 22, and after the plurality of battery cells 20 are grouped, an insulating member 22 may be provided between the first side surfaces 215 of two adjacent battery cells 20 to achieve insulation between the battery cells 20; or the non-insulating coating areas 214 of the two first side surfaces 215 may be covered with the insulating member 22, so that after the plurality of battery cells 20 are grouped, there are two insulating members 22 between the outer shells 21 of two adjacent battery cells 20 to achieve insulation between the battery cells 20.

[0121] There may be multiple battery packs, which may be arranged along a first direction or a second direction; an insulating member 22 may also be provided between the outer shells 21 of the battery cells 20 in two adjacent battery packs, so that the battery cells 20 in two adjacent battery packs have better insulation performance.

[0122] Of course, in other examples, multiple battery cells 20 may also be arranged in sequence along the first direction to form a battery pack. In this case, the first side 215 may also refer to the side of the battery cell 20 along the first direction; multiple battery cells 20 may also be arranged in sequence along the second direction to form a battery pack. In this case, the second side may refer to the side of the battery cell 20 along the second direction.

[0123] The third direction may refer to the thickness direction X of the battery cell 20 , the second direction may refer to the width direction Y of the battery cell 20 , and the first direction may refer to the height direction Z of the battery cell 20 .

[0124] The first insulating portion 221 may refer to a portion of the insulating member 22 covering the non-insulating coating region 214 of the first side surface 215 .

[0125] By adopting the technical solution of this embodiment, the first insulating part 221 covers the non-insulating coating area 214 of the first side surface 215. The first insulating part 221 and the insulating coating cooperate to achieve full-surface insulation of the first side surface 215. The battery cell 20 has good insulation performance. The first insulating part 221 can also separate the non-insulating coating areas 214 of two adjacent battery cells 20, so that the battery cells 20 have good insulation effect, which is beneficial to improving the reliability of the battery 1100.

[0126] See also Figure 8 As shown, Figure 8 for Figure 5 The structure of the battery cell 20 is shown in another perspective.

[0127] In some embodiments, the size of the first insulating portion 221 in the first direction is H1, and the size of the non-insulating coating area 214 of the first side 215 in the first direction is H2, wherein H1≥H2, and the first direction is the distribution direction of the insulating coating area 213 and the non-insulating coating area 214 in the first side 215.

[0128] The dimension H1 of the first insulating portion 221 in the first direction may refer to a distance between two surfaces of the first insulating portion 221 that are opposite to each other along the first direction.

[0129] The dimension H2 of the non-insulating coating area 214 of the first side surface 215 in the first direction may refer to the distance between the insulating coating area 213 of the first side surface 215 and the end surface of the end cover 211 facing away from the housing 212 .

[0130] The first direction may refer to the distribution direction of the insulating coating area 213 and the non-insulating coating area 214 in the first side 215; as an example, the insulating coating area 213 of the first side 215 and the non-insulating coating area 214 of the first side 215 are arranged and distributed along the height direction Z of the battery cell 20, and the first direction may refer to the height direction Z of the battery cell 20.

[0131] H1≥H2. It can be understood that, in the first direction, the first insulating portion 221 can completely cover the non-insulating coating area 214 of the first side surface 215.

[0132] As an example, when H1=H2, the two opposite edges of the first insulating portion 221 along the first direction are respectively flush with the dotted line A and the end surface of the end cover 211 facing away from the shell body 212; when H1>H2, the edge of the first insulating portion 221 close to the end cover 211 protrudes from the end surface of the end cover 211 facing away from the end cover 211, and the edge of the first insulating portion 221 away from the end cover 211 covers a portion of the insulating coating area 213 of the first side surface 215; or, the edge of the first insulating portion 221 close to the end cover 211 is flush with the end surface of the end cover 211 facing away from the shell body 212, and the edge of the first insulating portion 221 away from the end cover 211 covers a portion of the insulating coating area 213 of the first side surface 215; or, the edge of the first insulating portion 221 close to the end cover 211 protrudes from the end surface of the end cover 211 facing away from the end cover 211 and covers and is flush with the dotted line A.

[0133] By adopting the technical solution of this embodiment, in the first direction, the first insulating part 221 can completely cover the non-insulating coating area 214 of the first side 215, which can further improve the insulation reliability of the battery cell 20 and the insulation reliability between two adjacent battery cells 20, which is beneficial to improving the reliability of the battery 1100.

[0134] In some embodiments, 1.05≤H1 / H2≤1.3.

[0135] It can be understood that H1 / H2≥1.05, so that the first insulating part 221 can completely cover the non-insulating coating area 214 of the first side surface 215 in the first direction, so that the battery cell 20 has better insulation reliability; during the charging and discharging process of the battery cell 20, the expansion amplitude of the first side surface 215 is greater as it is closer to its center position, and H1 / H2≤1.3, so that the first insulating part 221 can be at a certain distance from the center position of the first side surface 215, and the first insulating part 221 can better avoid the expansion of the first side surface 215, which is beneficial to improving the performance of the battery cell 20; the size of the first insulating part 221 in the first direction is not too large, which can reduce material waste.

[0136] By adopting the technical solution of this embodiment, the design of 1.05≤H1 / H2≤1.3, the size of the first insulating part 221 in the first direction is reasonably designed, so that on the basis of good insulation reliability of the battery cell 20, the first insulating part 221 can better avoid the expansion of the first side surface 215, which is beneficial to improving the performance of the battery cell 20, and can also reduce material waste and reduce the production cost of the insulating part 22, which is also beneficial to improving the battery 1100. It is beneficial to improve the energy density of the battery 1100.

[0137] In some embodiments, 1.1≤H1 / H2≤1.2.

[0138] By adopting the technical solution of this embodiment, the design of 1.1≤H1 / H2≤1.2, the size design of the first insulating part 221 in the first direction is more reasonable, the insulation reliability of the battery cell 20 can also be designed to be better, the first insulating part 221 can better avoid the expansion of the first side surface 215, which is beneficial to improve the performance of the battery cell 20, better reduce material waste, and is more conducive to reducing the production cost of the battery cell 20, and is more conducive to improving the energy density of the battery 1100.

[0139] In some embodiments, the value of H1 / H2 may be, but is not limited to, 1.05, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19, 1.2, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, 1.3.

[0140] In some embodiments, a dimension of the first insulating portion 221 in the first direction is H1, wherein 1 mm≤H1≤15 mm, and the first direction is a distribution direction of the insulating coating region 213 and the non-insulating coating region 214 in the first side surface 215 .

[0141] By adopting the technical solution of this embodiment, the design of 1mm≤H1≤15mm can make the first insulating part 221 completely cover the non-insulating coating area 214 of the first side surface 215 of most battery cells 20 in the first direction, so that most battery cells 20 have better insulation performance; in addition, the size design of the first insulating part 221 in the first direction is reasonable, which can reduce material waste and help reduce the production cost of the battery cells 20.

[0142] In some embodiments, 1.5 mm ≤ H1 ≤ 12 mm.

[0143] By adopting the technical solution of this embodiment, the design of 1.5mm≤H1≤12mm can enable the first insulating part 221 to better and completely cover the non-insulating coating area 214 of the first side surface 215 of most of the battery cells 20 in the first direction, so that most of the battery cells 20 have better insulation performance; in addition, the size of the first insulating part 221 is also more reasonable, which can reduce material waste and help reduce the production cost of the battery cells 20.

[0144] In some embodiments, the value of H1 can be, but is not limited to, 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, or 15 mm.

[0145] In some embodiments, the dimension of the first insulating portion 221 in the second direction is L1, and the dimension of the non-insulating coating area 214 of the first side surface 215 in the second direction is L2, wherein L1≥L2, the second direction is perpendicular to the first direction, and the second direction is parallel to the first side surface 215.

[0146] The dimension L1 of the first insulating portion 221 in the second direction may refer to a distance between two surfaces of the first insulating portion 221 that are opposite to each other along the second direction.

[0147] The dimension L2 of the non-insulating coating area 214 of the first side surface 215 in the second direction may refer to the spacing between two opposite edges of the non-insulating coating area 214 of the first side surface 215 in the second direction. As an example, the non-insulating coating area 214 of the first side surface 215 extends from one edge of the second side surface to the other edge along the second direction, and the dimension L2 of the non-insulating coating area 214 of the first side surface 215 in the second direction may refer to the spacing between two opposite sides of the battery cell 20 along the second direction, that is, the width of the battery cell 20.

[0148] The second direction may refer to a direction perpendicular to the first direction and parallel to the first surface. As an example, the first direction may refer to the width direction Y of the battery cell 20 , wherein the dimension H2 of the non-insulating coating area 214 of the first side surface 215 in the second direction may refer to the width of the battery cell 20 .

[0149] L1≥L2, it can be understood that, in the second direction, the first insulating portion 221 can completely cover the non-insulating coating area 214 of the first side surface 215. In the case of L1=L2, the two opposite edges of the first insulating portion 221 along the first direction are flush with the two opposite edges of the non-insulating coating area 214 of the first side surface 215 along the second direction; in the case of L1>L2, one of the two opposite edges of the first insulating portion 221 along the second direction is flush with one of the two opposite edges of the non-insulating coating area 214 of the first side surface 215 along the second direction, and the other edge protrudes from the other edge of the non-insulating coating area 214 of the first side surface 215 along the second direction; or, the two opposite edges of the first insulating portion 221 along the second direction protrude from the two opposite edges of the non-insulating coating area 214 of the first side surface 215 along the second direction.

[0150] By adopting the technical solution of this embodiment, in the second direction and the first direction, the first insulating part 221 can completely cover the non-insulating coating area 214 of the first side 215, which can better improve the insulation reliability of the battery cell 20 and the insulation reliability between two adjacent battery cells 20, which is beneficial to improving the reliability of the battery 1100.

[0151] In some embodiments, 0.1 mm≤L1-L2≤4 mm.

[0152] By adopting the technical solution of this embodiment, the design of 0.1mm≤L1-L2≤4mm, on the basis of the good insulation performance of the battery cell 20, the first insulating part 221 protrudes from the battery cell 20 in the second direction to a reasonable size, and the battery cells 20 can be tightly assembled together, thereby improving the space utilization of the battery 1100 and the volume energy density of the battery 1100.

[0153] In some embodiments, 1 mm ≤ L1 - L2 ≤ 3 mm.

[0154] By adopting the technical solution of this embodiment, the design of 1mm≤L1-L2≤3mm, the size design of the first insulating part 221 in the second direction is more reasonable, the battery cell 20 can have better insulation performance, and the battery cell 20 can be more tightly assembled together, which better improves the space utilization of the battery 1100 and improves the volume energy density of the battery 1100.

[0155] In some embodiments, the value of L1-L2 may be, but is not limited to, 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4 mm.

[0156] In some embodiments, an edge of the first insulating portion 221 close to the end cover 211 is flush with an end surface of the end cover 211 facing away from the housing 212 .

[0157] It can be understood that, on the basis that the first insulating portion 221 completely covers the non-insulating coating area 214 of the first side surface 215 , the first insulating portion 221 does not protrude beyond the end surface of the end cover 211 facing away from the housing 212 .

[0158] By adopting the technical solution of this embodiment, the first insulating portion 221 does not protrude from the end cover 211 , which can reduce the risk of interference with other mounting components (such as patches, etc.) on the end cover 211 , thereby facilitating the assembly of multiple battery cells 20 .

[0159] In some embodiments, the insulating member 22 also includes a second insulating portion 222 and a third insulating portion 223. The second insulating portion 222 is connected to one end of the first insulating portion 221, and the third insulating portion 223 is connected to the other end of the second insulating portion 222. The second insulating portion 222 and the third insulating portion 223 respectively cover the opposite two sides of the insulating coating on the first side 215. The first insulating portion 221, the second insulating portion 222 and the second insulating portion 222 are surrounded to form a hollow area 225.

[0160] The second insulating portion 222 may refer to a portion of the insulating member 22 connected to one end of the first insulating portion 221, and the third insulating portion 223 may refer to a portion of the insulating member 22 connected to the other end of the first insulating portion 221. The second insulating portion 222 and the third insulating portion 223 respectively cover the opposite two sides of the insulating coating on the first side surface 215. The hollow area 225 may refer to a space formed by the first insulating portion 221, the second insulating portion 222 and the third insulating portion 223; as an example, the opposite two sides of the insulating member 22 along the second direction are the second insulating portion 222 and the third insulating portion 223, respectively, the first insulating portion 221, the second insulating portion 222 and the third insulating portion 223 form a U-shaped structure, and the middle space of the U-shaped structure is the hollow area 225. Of course, in other embodiments, the first insulating portion 221, the second insulating portion 222 and the third insulating portion 223 can also be surrounded to form other shapes.

[0161] By adopting the technical solution of this embodiment, the first insulating part 221 and the second insulating part 222 can increase the connection area between the outer shell 21 and the insulating member 22, so that the insulating member 22 can be stably fixed between two adjacent battery cells 20, which is beneficial to improving the insulation reliability between the battery cells 20; the second insulating part 222 and the third insulating part 223 can cover the insulating coating on the first side 215, which can improve the insulation reliability of the insulating coating area 213; in addition, during the charging and discharging process of the battery cell 20, the outer shell 21 of the battery cell 20 will expand toward the hollow area 225, and the hollow area 225 can provide expansion space for the battery cell 20, which is beneficial to improving the performance of the battery cell 20 and the performance of the battery 1100.

[0162] In some embodiments, the insulating member 22 also includes a fourth insulating portion 224, one end of the fourth insulating portion 224 is connected to the end of the second insulating portion 222 facing away from the first insulating portion 221, and the other end of the fourth insulating portion 224 is connected to the end of the third insulating portion 223 facing away from the first insulating portion 221, and the first insulating portion 221, the second insulating portion 222, the second insulating portion 222 and the fourth insulating portion 224 are arranged to form a hollow area 225.

[0163] The fourth insulating portion 224 may refer to a portion of the insulating member 22 that connects the end of the second insulating portion 222 facing away from the first insulating portion 221 and the end of the third insulating portion 223 facing away from the first insulating portion 221; the first insulating portion 221, the second insulating portion 222, the third insulating portion 223 and the fourth insulating portion 224 are arranged to form a closed frame structure, and the shape of the frame structure is adapted to the shape of the first side surface 215 so as to cover the periphery of the first side surface 215; the structure of the frame may be of various shapes, such as a quadrilateral, a pentagon, an ellipse, etc.; as an example, the fourth insulating portion 224 and the first insulating portion 221 are respectively arranged on the opposite side portions of the insulating member 22 along the first direction, and the first insulating portion 221, the second insulating portion 222, the third insulating portion 223 and the fourth insulating portion 224 are arranged to form a quadrilateral frame structure.

[0164] By adopting the technical solution of this embodiment, the first insulating part 221, the second insulating part 222, the third insulating part 223 and the fourth insulating part 224 are arranged to form a closed frame structure. The insulating part 22 has good structural strength and can be stably and reliably fixed between the battery cells 20, which is beneficial to improving the insulation reliability between the battery cells 20 and the reliability of the battery 1100.

[0165] In some embodiments, the first insulating part 221, the second insulating part 222, the third insulating part 223 and the fourth insulating part 224 are an integral structure. The first insulating part 221, the second insulating part 222, the third insulating part 223 and the fourth insulating part 224 can be an integral structure made by an integral molding method such as integral injection molding or 3D printing. This can reduce the production procedures and reduce the production cost. In addition, the structural strength of the insulating part 22 is also good, which is beneficial to improving the insulation reliability; of course, in its embodiment, the first insulating part 221, the second insulating part 222, the third insulating part 223 and the fourth insulating part 224 can also be connected by bonding, clamping and the like.

[0166] In some embodiments, a distance between an edge of the fourth insulating portion 224 facing away from the first insulating portion 221 and a surface of the housing 212 facing away from the end cover 211 is L3, wherein 0 mm ≤ L3 ≤ 10 mm.

[0167] 0mm≤L3≤10mm, it can be understood that the fourth insulating part 224 will not protrude from the surface of the shell 212 facing away from the end cover 211. In the case of L3=0, the edge of the fourth insulating part 224 facing away from the first insulating part 221 is flush with the surface of the shell 212 facing away from the end cover 211; in the case of 0mm<L3≤10mm, there is a certain distance between the edge of the fourth insulating part 224 facing away from the first insulating part 221 and the surface of the shell 212 facing away from the end cover 211. During the expansion of the battery cell 20, the closer the first side surface 215 is to its center position, the greater the expansion amplitude, and the larger the L3 setting is, the closer the fourth insulating part 224 is to the center position of the first side surface 215, so that the hollow area 225 reserves the expansion space for the battery cell 20. It is not conducive to the improvement of the performance of the battery cell 20.

[0168] By adopting the technical solution of this embodiment, the design of 0mm≤L3≤10mm ensures that the fourth insulating portion 224 does not protrude from the surface of the shell 212 facing away from the end cover 211, so that the battery cell 20 can be stably installed in the box 10 of the battery 1100; in addition, the distance between the edge of the fourth insulating portion 224 facing away from the first insulating portion 221 and the surface of the shell 212 facing away from the end cover 211 is not too large, and the hollow area 225 can reserve a larger space for the expansion of the battery cell 20, which is beneficial to improving the performance of the battery cell 20 and the performance of the battery 1100.

[0169] In some embodiments, 1 mm ≤ L3 ≤ 5 mm.

[0170] By adopting the technical solution of this embodiment, the design of 1mm≤L3≤5mm allows a certain distance between the fourth insulating part 224 and the surface of the shell 212 facing away from the end cover 211. When the insulating part 22 is located between the shells 212 of two adjacent battery cells 20, external parts are not easy to contact the fourth insulating part 224, thereby reducing the risk of damage. In addition, the fourth insulating part 224 is far away from the center of the first side surface 215, and the hollow area 225 can reserve a larger space for the expansion of the battery cell 20, which is conducive to better improving the performance of the battery cell 20 and improving the performance of the battery 1100.

[0171] In some embodiments, the first insulating portion 221 and the fourth insulating portion 224 are symmetrically arranged.

[0172] It is understandable that the first insulating portion 221 and the fourth insulating portion 224 have the same structure and size. As an example, the size H4 of the fourth insulating portion 224 in the first direction is equal to the size H1 of the first insulating portion 221 in the first direction, and the size L4 of the fourth insulating portion 224 in the second direction is equal to the size L1 of the first insulating portion 221 in the second direction, so that the fourth insulating portion 224 can also completely cover the non-insulating coating area 214 of the first side surface 215.

[0173] By adopting the technical solution of this embodiment, the first insulating part 221 and the fourth insulating part 224 adopt the same structure and size, and the fourth insulating part 224 and the first insulating part 221 can be used interchangeably. In this way, during assembly, the insulating part 22 does not need to distinguish between the first insulating part 221 and the fourth insulating part 224, and the assembly operation is simpler and the assembly efficiency is high.

[0174] Please also read Fig. 9 and Fig.10 As shown, Fig. 9 This is a schematic structural diagram of a battery cell 20 provided in some other embodiments of the present application. Fig.10 for Fig. 9 The exploded structural diagram of the battery cell 20 is shown.

[0175] In some embodiments, the second insulating portion 222 includes a first insulating segment 2221 and a second insulating segment 2222, the first insulating segment 2221 is connected to the first insulating portion 221, the second insulating segment 2222 is connected to the fourth insulating portion 224, the first insulating segment 2221 and the second insulating segment 2222 are spaced apart and distributed along a first direction, wherein the first direction is the distribution direction of the insulating coating area 213 and the non-insulating coating area 214 in the first side 215; and / or, the third insulating portion 223 includes a third insulating segment 2231 and a fourth insulating segment 2232, the third insulating segment 2231 is connected to the first insulating portion 221, the fourth insulating segment 2232 is connected to the fourth insulating portion 224, the third insulating segment 2231 and the fourth insulating segment 2232 are spaced apart and distributed along the first direction, wherein the first direction is the distribution direction of the insulating coating area 213 and the non-insulating coating area 214 in the first side 215.

[0176] The second insulating portion 222 has a segmented structure in the first direction. The second insulating portion 222 is divided into two sections in the first direction, wherein the section connected to the first insulating portion 221 is the first insulating section 2221, and the section connected to the fourth insulating portion 224 is the second insulating section 2222. There is a certain spacing distance between the first insulating section 2221 and the second insulating section 2222. The setting of the spacing distance can reduce the material usage of the second insulating portion 222 and reduce the manufacturing cost of the insulating member 22.

[0177] The third insulating portion 223 has a segmented structure in the first direction. The third insulating portion 223 is divided into two sections in the first direction, wherein the section connected to the first insulating portion 221 is the third insulating section 2231, and the section connected to the fourth insulating portion 224 is the fourth insulating section 2232. There is a certain spacing distance between the third insulating section 2231 and the fourth insulating section 2232. The setting of the spacing distance can reduce the material usage of the third insulating portion 223 and reduce the manufacturing cost of the insulating member 22.

[0178] In some possible embodiments, the second insulating portion 222 includes a first insulating segment 2221 and a second insulating segment 2222, the first insulating segment 2221 is connected to the first insulating portion 221, the second insulating segment 2222 is connected to the fourth insulating portion 224, the first insulating segment 2221 and the second insulating segment 2222 are spaced apart along a first direction, wherein the first direction is the distribution direction of the insulating coating area 213 and the non-insulating coating area 214 in the first side 215, the first insulating segment 2221 and the second insulating segment 2222 are spaced apart, which can reduce the material usage of the second insulating portion 222 and reduce the manufacturing cost of the insulating member 22.

[0179] In some possible embodiments, the third insulating portion 223 includes a third insulating segment 2231 and a fourth insulating segment 2232, the third insulating segment 2231 is connected to the first insulating portion 221, the fourth insulating segment 2232 is connected to the fourth insulating portion 224, and the third insulating segment 2231 and the fourth insulating segment 2232 are spaced apart and distributed along a first direction, wherein the first direction is a distribution direction of the insulating coating area 213 and the non-insulating coating area 214 in the first side 215; the third insulating segment 2231 and the fourth insulating segment 2232 are spaced apart and arranged, which can reduce the material usage of the third insulating portion 223 and reduce the manufacturing cost of the insulating member 22.

[0180] In some possible embodiments, the second insulating portion 222 includes a first insulating segment 2221 and a second insulating segment 2222, the first insulating segment 2221 is connected to the first insulating portion 221, the second insulating segment 2222 is connected to the fourth insulating portion 224, and the first insulating segment 2221 and the second insulating segment 2222 are spaced apart along the first direction; the third insulating portion 223 includes a third insulating segment 2231 and a fourth insulating segment 2232, the third insulating segment 2231 is connected to the first insulating portion 221, the fourth insulating segment 2232 is connected to the fourth insulating portion 224, and the third insulating segment 2231 and the fourth insulating segment 2232 are spaced apart along the first direction, wherein the first direction is the distribution direction of the insulating coating area 213 and the non-insulating coating area 214 in the first side surface 215.

[0181] The first insulating segment 2221 and the second insulating segment 2222 are arranged at intervals, and the third insulating segment 2231 and the fourth insulating segment 2232 are arranged at intervals, which can reduce the material usage of the second insulating portion 222 and the third insulating portion 223 at the same time, and can better reduce the production cost of the insulating member 22; in addition, the spacing between the first insulating segment 2221 and the second insulating segment 2222 and the spacing between the third insulating segment 2231 and the fourth insulating segment 2232 can be adjusted to change the spacing between the first insulating portion 221 and the fourth insulating portion 224, so as to meet the insulation requirements of battery cells 20 of different sizes, and the insulating member 22 has better versatility.

[0182] Among them, the first insulating part 221, the first insulating segment 2221 and the third insulating segment 2231 are an integral structure, and the first insulating part 221, the first insulating segment 2221 and the third insulating segment 2231 can be an integral structure made by an integral molding method such as integral injection molding or 3D printing; the first insulating part 221, the first insulating segment 2221 and the third insulating segment 2231 form a U-shaped structure. Of course, the first insulating part 221, the first insulating segment 2221 and the third insulating segment 2231 can also be surrounded to form other structures with an opening at one end; similarly, the fourth insulating part 224, the second insulating segment 2222 and the fourth insulating segment 2232 are also an integral structure, and the fourth insulating part 224, the second insulating segment 2222 and the fourth insulating segment 2232 form a U-shaped structure. Of course, the fourth insulating part 224, the second insulating segment 2222 and the fourth insulating segment 2232 can also be surrounded to form other structures with an opening at one end.

[0183] By adopting the technical solution of this embodiment, the material usage of the insulating member 22 can be reduced, the manufacturing cost of the insulating member 22 can be reduced, and the manufacturing cost of the battery cell 20 can be reduced.

[0184] In some embodiments, the first side surface 215 is the side surface of the battery cell 20 with the largest area.

[0185] It is understandable that the outer surface of the shell 21 includes multiple side surfaces, and the first side surface 215 is the side surface with the largest area among the multiple side surfaces; as an example, the side surface with the largest area of ​​the battery cell 20 may refer to the side surface of the shell 21 along the third direction.

[0186] By adopting the technical solution of this embodiment, the area of ​​the first side 215 is the largest, and the area of ​​the corresponding non-insulating coating area 214 of the first side 215 is also the largest. The risk of insulation failure of the first side 215 is the highest. The non-insulating coating area 214 of the first side 215 is covered with an insulating part 22, which can effectively reduce the risk of insulation failure and effectively improve the insulation performance of the battery cell 20.

[0187] During the charge and discharge of the battery cell 20 , the first side surface 215 expands the most. The hollow area 225 formed by the insulating member 22 can provide expansion space for the first side surface 215 , thereby effectively improving the performance of the battery cell 20 .

[0188] In some embodiments, in combination Figures 5 to 7 As shown, the dimension of the insulating member 22 in the third direction is H3, wherein 1 mm≤H3≤5 mm, and the third direction is perpendicular to the first side surface 215 .

[0189] The dimension H3 of the insulating member 22 in the third direction may refer to the distance between two opposite side surfaces of the insulating member 22 in the third direction. The third direction may refer to a direction perpendicular to the first side surface 215 , which may refer to the thickness direction X of the battery cell 20 .

[0190] By adopting the technical solution of this embodiment, a plurality of battery cells 20 are arranged along a third direction, and an insulating member 22 is provided between the outer shells 21 of two adjacent battery cells 20. The dimension H3 of the insulating member 22 in the third direction is 1mm≤H3≤5mm, so that the insulating member 22 has a certain thickness, and the insulation performance between two adjacent battery cells 20 is better; the distance between the outer shells 21 of two adjacent battery cells 20 is not too large, thereby improving the space utilization rate in the battery 1100, which is beneficial to improving the volume energy density of the battery 1100.

[0191] In some embodiments, 3 mm ≤ H3 ≤ 4 mm.

[0192] By adopting the technical solution of this embodiment and the design of 3mm≤H3≤4mm, the thickness of the insulating member 22 is reasonably set, which can better take into account the insulation performance between the battery cells 20 and the volume energy density of the battery 1100.

[0193] In some embodiments, the value of H3 may be, but is not limited to, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4 mm, 4.2 mm, 4.4 mm, 4.6 mm, 4.8 mm, or 5 mm.

[0194] In some embodiments, the insulating member 22 is fixedly connected to the housing 21 .

[0195] It can be understood that the insulating member 22 is fixedly connected to the outer shell 21 as a whole; the insulating member 22 can be fixedly connected to the end cover 211, the insulating member 22 can also be fixedly connected to the shell 212, and the insulating member 22 can also be fixedly connected to the end cover 211 and the shell 212 at the same time; the connection method between the insulating member 22 and the outer shell 21 can be screw connection, clamping connection, bonding and other connection methods.

[0196] By adopting the technical solution of this embodiment, the insulating part 22 is fixedly connected to the outer shell 21, and the insulating part 22 can stably shield the area without insulating coating 214, and the insulation reliability of the battery cell 20 is good; after a plurality of battery cells 20 are grouped, the insulating part 22 is not easy to move, and the battery cell 20 can stably separate the area without insulating coating 214 of two adjacent battery cells 20, so that the battery cells 20 have better insulation performance, which is beneficial to improving the reliability of the battery 1100.

[0197] In some embodiments, the insulating member 22 is bonded to the housing 21 .

[0198] It can be understood that the insulating member 22 is bonded to the housing 21 by an adhesive; as an example, the insulating member 22 is bonded to the first side surface 215 by an adhesive.

[0199] By adopting the technical solution of this embodiment, the insulating member 22 is bonded to the housing 21, and the fixing operation is simple, which is conducive to improving production efficiency.

[0200] In some embodiments, the insulating member 22 includes at least one of an insulating film or an insulating sheet.

[0201] It can be understood that the insulating member 22 adopts the structural form of an insulating film, and the insulating film covers the area 214 without insulating coating. Its insulating structure is simple and easy to process and manufacture. The insulating member 22 can also adopt the structural form of an insulating sheet, and the insulating sheet is clamped between the first side surfaces 215 of two adjacent battery cells 20, so as to achieve insulation between the battery cells 20. Its structure is simple and easy to process and manufacture. The insulating member 22 can also adopt a mixed structural form of an insulating film and an insulating sheet. For example, the insulating film covers a part of the area 214 without insulating coating, and the insulating sheet covers another part without insulating coating, or the insulating film and the insulating sheet are stacked and cover the area 214 without insulating coating to increase the insulation performance.

[0202] By adopting the technical solution of this embodiment, the insulating member 22 has a simple structure and is easy to process and manufacture, which is conducive to reducing the manufacturing cost of the insulating member 22. The present application is described below in conjunction with some embodiments.

[0203] Embodiment 1

[0204] Combination Figures 5 to 8 As shown, in this embodiment, the battery cell 20 includes an outer shell 21 and an insulating member 22, the outer shell 21 includes a shell body 212 and an end cover 211, the end cover 211 is covered at the opening of the shell body 212; the outer surface of the outer shell 21 includes an insulating coating area 213 and a non-insulating coating area 214, the non-insulating coating area 214 is located at the connection between the end cover 211 and the shell body 212, and the insulating coating area 213 is covered with an insulating coating; the insulating member 22 covers at least a portion of the non-insulating coating area 214.

[0205] In this embodiment, the side of the housing 21 adjacent to other battery cells 20 is the first side 215 ; the insulating member 22 includes a first insulating portion 221 , and the first insulating portion 221 covers the non-insulating coating area 214 of the first side 215 .

[0206] In the present embodiment, a plurality of battery cells 20 are arranged in sequence along a third direction to form a battery pack, and the insulating member 22 is located between the outer shells 21 of two adjacent battery cells 20, thereby achieving insulation between the two battery cells 20; at this time, the first side surface 215 may also refer to the side surface of the battery cell 20 in the third direction; the two opposite side surfaces of the battery cell 20 in the third direction may both be first side surfaces 215, wherein the non-insulating coating area 214 of one first side surface 215 is covered with the insulating member 22, and the other first side surface 215 is not covered with the insulating member 22, and after the plurality of battery cells 20 are grouped, an insulating member 22 is provided between the first side surfaces 215 of two adjacent battery cells 20, so as to achieve insulation between the battery cells 20; wherein the third direction may refer to the thickness direction X of the battery cell 20, the second direction may refer to the width direction Y of the battery cell 20, and the first direction may refer to the height direction Z of the battery cell 20.

[0207] In this embodiment, the size of the first insulating portion 221 in the first direction is H1, and the size of the non-insulating coating area 214 of the first side surface 215 in the first direction is H2, wherein H1≥H2, and the first direction is the distribution direction of the insulating coating area 213 and the non-insulating coating area 214 in the first side surface 215.

[0208] In this embodiment, the edge of the first insulating portion 221 close to the end cover 211 is flush with the end surface of the end cover 211 facing away from the shell 212 ; the edge of the first insulating portion 221 away from the end cover 211 covers a portion of the insulating coating area 213 of the first side surface 215 .

[0209] In this embodiment, the size of the first insulating portion 221 in the second direction is L1, and the size of the non-insulating coating area 214 of the first side surface 215 in the second direction is L2, wherein L1≥L2, the second direction is perpendicular to the first direction, and the second direction is parallel to the first side surface 215. The two opposite edges of the first insulating portion 221 along the second direction protrude from the two opposite edges of the non-insulating coating area 214 of the first side surface 215 along the second direction.

[0210] In this embodiment, the insulating member 22 also includes a second insulating portion 222 and a third insulating portion 223. The second insulating portion 222 is connected to one end of the first insulating portion 221, and the third insulating portion 223 is connected to the other end of the second insulating portion 222. The second insulating portion 222 and the third insulating portion 223 respectively cover the opposite two sides of the insulating coating on the first side 215. The first insulating portion 221, the second insulating portion 222 and the second insulating portion 222 are surrounded to form a hollow area 225.

[0211] In this embodiment, the insulating member 22 also includes a fourth insulating portion 224, one end of the fourth insulating portion 224 is connected to the end of the second insulating portion 222 facing away from the first insulating portion 221, and the other end of the fourth insulating portion 224 is connected to the end of the third insulating portion 223 facing away from the first insulating portion 221, and the first insulating portion 221, the second insulating portion 222, the second insulating portion 222 and the fourth insulating portion 224 are arranged to form a hollow area 225.

[0212] In this embodiment, the fourth insulating portion 224 and the first insulating portion 221 are respectively arranged on opposite sides of the insulating member 22 along the first direction, and the first insulating portion 221, the second insulating portion 222, the third insulating portion 223 and the fourth insulating portion 224 are surrounded to form a quadrilateral frame structure. The first insulating portion 221, the second insulating portion 222, the third insulating portion 223 and the fourth insulating portion 224 are an integrated structure.

[0213] In this embodiment, the distance between the edge of the fourth insulating portion 224 facing away from the first insulating portion 221 and the surface of the housing 212 facing away from the end cover 211 is L3, wherein 0 mm≤L3≤10 mm.

[0214] In this embodiment, the first insulating portion 221 and the fourth insulating portion 224 are symmetrically arranged.

[0215] In this embodiment, the first side surface 215 is the side surface of the battery cell 20 with the largest area.

[0216] Embodiment 2

[0217] Combination Fig. 9 and Fig.10 As shown, the difference between this embodiment and the first embodiment is that: the second insulating portion 222 includes a first insulating segment 2221 and a second insulating segment 2222, the first insulating segment 2221 is connected to the first insulating portion 221, the second insulating segment 2222 is connected to the fourth insulating portion 224, the first insulating segment 2221 and the second insulating segment 2222 are spaced apart along the first direction, wherein the first direction is the distribution direction of the insulating coating area 213 and the non-insulating coating area 214 in the first side surface 215; the third insulating portion 223 includes a third insulating segment 2231 and a fourth insulating segment 2232, the third insulating segment 2231 is connected to the first insulating portion 221, the fourth insulating segment 2232 is connected to the fourth insulating portion 224, the third insulating segment 2231 and the fourth insulating segment 2232 are spaced apart along the first direction, wherein the first direction is the distribution direction of the insulating coating area 213 and the non-insulating coating area 214 in the first side surface 215.

[0218] In this embodiment, the first insulating portion 221, the first insulating segment 2221 and the third insulating segment 2231 are an integrated structure, and the first insulating portion 221, the first insulating segment 2221 and the third insulating segment 2231 form a U-shaped structure; similarly, the fourth insulating portion 224, the second insulating segment 2222 and the fourth insulating segment 2232 are also an integrated structure, and the fourth insulating portion 224, the second insulating segment 2222 and the fourth insulating segment 2232 form a U-shaped structure. This structure is simple and convenient for processing and manufacturing the insulating member 22.

[0219] In some embodiments of the present application, Figure 5 As shown, a battery 1100 is provided, comprising the battery cell 20 as described in the above embodiment.

[0220] The battery 1100 of the embodiment of the present application adopts the above-mentioned battery cell 20 , and the battery cell 20 has good insulation performance, which is beneficial to improving the reliability of the battery 1100 .

[0221] In some embodiments, in combination Figure 7 As shown, the battery 1100 includes a plurality of battery cells 20 , and an insulating member 22 is provided between the housings 21 of two adjacent battery cells 20 .

[0222] By adopting the technical solution of this embodiment, the insulating part 22 can achieve insulation of the non-insulating coating area 214 of two adjacent battery cells 20, and cooperate with the insulating coating to effectively improve the insulation reliability between the battery cells 20 and better improve the reliability of the battery 1100.

[0223] In some embodiments of the present application, Figure 1 As shown, an electrical device is provided, comprising the battery 1100 as described in the above embodiment.

[0224] The electric device of the embodiment of the present application adopts the above-mentioned battery 1100. The battery 1100 has good reliability in use and is conducive to improving the performance of the electric device.

[0225] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, they will not be repeated herein.

[0226] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell, characterized in that: include: A housing, comprising a shell and an end cover, wherein the end cover is disposed at an opening of the shell; an outer surface of the shell comprises an insulating coating area and a non-insulating coating area, wherein the non-insulating coating area is located at a connection between the end cover and the shell, and the insulating coating area is covered with an insulating coating; and An insulating member covers at least a portion of the area without insulating coating.

2. The battery cell according to claim 1, characterized in that: The side of the housing adjacent to other battery cells is a first side; the insulating member includes a first insulating portion, and the first insulating portion covers the non-insulating coating area on the first side.

3. The battery cell according to claim 2, characterized in that: The size of the first insulating portion in the first direction is H1, and the size of the non-insulating coating area on the first side in the first direction is H2, wherein H1≥H2, and the first direction is the distribution direction of the insulating coating area and the non-insulating coating area on the first side.

4. The battery cell according to claim 3, characterized in that: 1.05≤H1 / H2≤1.

3.

5. The battery cell according to claim 4, characterized in that: 1.1≤H1 / H2≤1.

2.

6. The battery cell according to claim 2, characterized in that: The dimension of the first insulating portion in the first direction is H1, wherein 1 mm≤H1≤15 mm, and the first direction is the distribution direction of the insulating coating area and the non-insulating coating area in the first side surface.

7. The battery cell according to claim 6, characterized in that: 1.5mm≤H1≤12mm.

8. The battery cell according to claim 3, characterized in that: The size of the first insulating portion in the second direction is L1, and the size of the non-insulating coating area of ​​the first side surface in the second direction is L2, wherein L1≥L2, the second direction is perpendicular to the first direction, and the second direction is parallel to the first side surface.

9. The battery cell according to claim 8, characterized in that: 0.1mm≤L1-L2≤4mm.

10. The battery cell according to claim 9, characterized in that: 1mm≤L1-L2≤3mm.

11. The battery cell according to any one of claims 2 to 10, characterized in that: The edge of the first insulating portion close to the end cover is flush with the end surface of the end cover facing away from the housing.

12. The battery cell according to any one of claims 2 to 10, characterized in that: The insulating member also includes a second insulating portion and a third insulating portion, the second insulating portion is connected to one end of the first insulating portion, and the third insulating portion is connected to the other end of the second insulating portion, the second insulating portion and the third insulating portion respectively cover the opposite two sides of the insulating coating on the first side, and the first insulating portion, the second insulating portion and the second insulating portion are surrounded to form a hollow area.

13. The battery cell according to claim 12, characterized in that: The insulating member also includes a fourth insulating portion, one end of the fourth insulating portion is connected to the end of the second insulating portion facing away from the first insulating portion, the other end of the fourth insulating portion is connected to the end of the third insulating portion facing away from the first insulating portion, and the first insulating portion, the second insulating portion, the second insulating portion and the fourth insulating portion are arranged to form the hollow area.

14. The battery cell according to claim 13, characterized in that: The distance between the edge of the fourth insulating portion facing away from the first insulating portion and the surface of the shell facing away from the end cover is L3, wherein 0mm≤L3≤10mm.

15. The battery cell according to claim 14, characterized in that: 1mm≤L3≤5mm.

16. The battery cell according to claim 13, characterized in that: The first insulating portion and the fourth insulating portion are symmetrically arranged.

17. The battery cell according to claim 13, characterized in that: The second insulating portion includes a first insulating segment and a second insulating segment, the first insulating segment is connected to the first insulating portion, the second insulating segment is connected to the fourth insulating portion, and the first insulating segment and the second insulating segment are spaced apart and distributed along a first direction, wherein the first direction is a distribution direction of the insulating coating area and the non-insulating coating area in the first side surface; And / or, the third insulating part includes a third insulating segment and a fourth insulating segment, the third insulating segment is connected to the first insulating part, the fourth insulating segment is connected to the fourth insulating part, and the third insulating segment and the fourth insulating segment are spaced apart and distributed along a first direction, wherein the first direction is the distribution direction of the insulating coating area and the non-insulating coating area in the first side.

18. The battery cell according to any one of claims 2 to 10, characterized in that: The first side surface is the side surface of the battery cell having the largest area.

19. The battery cell according to any one of claims 2 to 10, characterized in that: A dimension of the insulating member in a third direction is H3, wherein 1 mm ≤ H3 ≤ 5 mm, and the third direction is perpendicular to the first side surface.

20. The battery cell according to claim 19, characterized in that: 3mm≤H3≤4mm.

21. The battery cell according to any one of claims 1 to 10, characterized in that: The insulating member is fixedly connected to the housing.

22. The battery cell according to claim 21, characterized in that: The insulating member is bonded to the housing.

23. The battery cell according to any one of claims 1 to 10, characterized in that: The insulating member includes at least one of an insulating film or an insulating sheet.

24. A battery, characterized in that: A battery cell comprising the battery cell according to any one of claims 1 to 23.

25. The battery according to claim 24, characterized in that: The battery includes a plurality of battery cells, and the insulating member is disposed between the outer shells of two adjacent battery cells.

26. An electrical device, characterized in that: Comprising the battery according to claim 24 or 25.

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