Battery monomer, cover plate patch, battery and power utilization device

Abstract

The embodiment of the utility model provides a battery monomer, a cover plate patch, a battery and an electric device, the battery monomer comprises a cover plate and a cover plate patch, the cover plate patch comprises an identification surface and a background surface, the cover plate patch is attached to the surface of the cover plate, the identification surface and the background surface form an appearance surface of the battery monomer, and the identification surface is used for forming a pattern for identification; the cover plate patch comprises a patch body and an identification body, the patch body is provided with a groove, the identification body is arranged in the groove, an identification surface is formed on the surface of the identification body, and a background surface is formed on the surface of the patch body; the background surface protrudes out of the identification surface. According to the embodiment of the utility model, patterns can be formed to identify the battery monomers so as to transmit information about the battery monomers; in the state that the cover plate patch is attached to the cover plate, the probability that one part of the cover plate is directly exposed to the outside is reduced, and the probability that the single battery generates safety risks is reduced; the direct contact and friction between the identification surface and the outside are reduced, the abrasion speed of the identification surface can be reduced, and the durability is improved.

Description

Technical Field

[0001] An embodiment of the utility model relates to the technical field of batteries, and particularly relates to a battery cell, a cover plate patch, a battery and an electrical device. Background Art

[0002] In a battery cell, in order to maintain the insulation between the battery cell and the outside world and reduce the probability of safety risks caused by short circuit between the battery cell and the outside world, an insulating cover plate patch is attached to the cover plate made of metal material of the battery cell for insulation.

[0003] In the related art, the cover plate patch has a hollowed-out identification area for identifying the positive and negative electrodes of the battery, etc.

[0004] The hollowed-out identification area will directly expose part of the cover plate to the outside world, which has a certain impact on the insulation performance of the cover plate patch, and further reduces the insulation performance of the battery cell. Summary of the Utility Model

[0005] In view of this, an embodiment of the utility model expects to provide a battery cell, a cover plate patch, a battery and an electrical device that can enhance the insulation performance of the battery cell.

[0006] To achieve the above object, the technical solution of the embodiment of the utility model is realized as follows:

[0007] An embodiment of the utility model provides a battery cell, which includes:

[0008] A cover plate;

[0009] A cover plate patch, the outer surface of the first side of the cover plate patch along its thickness direction includes an identification surface and a background surface, the surface of the second side of the cover plate patch along its thickness direction is attached to the surface of the cover plate, the identification surface and the background surface form the appearance surface of the battery cell, and the identification surface is used to form a recognizable pattern;

[0010] The cover plate patch includes a patch body and an identification body, the patch body is provided with a groove, the groove is open on the first side along the thickness direction of the cover plate patch, the identification body is arranged in the groove, the surface of the identification body on the first side along the thickness direction of the cover plate patch forms the identification surface, and the surface of the patch body on the first side along the thickness direction of the cover plate patch forms the background surface;

[0011] The background surface protrudes from the identification surface along the thickness direction.

[0012] The battery cell provided by the embodiment of the present utility model can form a recognizable pattern on the cover plate patch to identify the battery cell and transmit information about the battery cell by setting an identification surface on the cover plate patch; the identification surface is formed by the entity structure identifier along one surface of the cover plate patch in the thickness direction, rather than the holes formed in a hollowing-out manner, so that when the cover plate patch is attached to the cover plate, the probability that a part of the cover plate is directly exposed to the outside is reduced, which is beneficial to reducing the probability of the battery cell generating safety risks and improving the insulation performance of the battery cell; through the cooperation of the identifier and the groove, the recognition degree of the identification surface can be improved; the inner wall of the groove can play a role in stopping and blocking the identifier, reducing the risk that the identifier is worn after long-term use and is not conducive to identification, which is beneficial to improving the durability of the identification surface, and further beneficial to improving the durability of the battery cell; the background surface of the patch body protrudes from the identification surface of the identifier, reducing the direct contact and friction between the identification surface and the outside, and thus can reduce the wear speed of the identification surface and improve the durability of the identification surface.

[0013] In some embodiments, the identification surface is the surface of the indentation formed by an embossing process. In this way, the embossing process for forming the identification surface is mature and simple, facilitating batch and rapid production, and is beneficial to improving the durability of the identification surface.

[0014] Or, the identification surface is the surface of the etch mark formed by an etching process. In this way, the recognition degree and durability of the identification surface can be improved, and the weight of the identifier can be reduced, which is beneficial to reducing the weight of the cover plate patch, and further beneficial to reducing the weight of the battery cell.

[0015] In some embodiments, the identifier is a printing layer formed by a printing process. In this way, the printing process is mature and simple, suitable for batch production. The identifier is formed in the groove by the printing process, which can improve the recognizability of the identification surface and increase the thickness of the identifier, thereby improving its durability.

[0016] Or, the identifier is an inkjet layer formed by an inkjet process. In this way, the inkjet process is mature and simple, suitable for batch production. By using the inkjet process, the inkjet layer can be conveniently adjusted, and thus the pattern formed on the identification surface can be conveniently adjusted, enabling the identification surface to easily form different patterns according to different requirements, which is beneficial to improving the production efficiency of the cover plate patch, and further beneficial to improving the production efficiency of the battery cell.

[0017] In some embodiments, both the identifier and the patch body are made of insulating materials.

[0018] In this way, it is beneficial to isolate the cover plate from the outside and reduce the probability of the cover plate being short-circuited with the outside through the penetrating groove.

[0019] In some embodiments, the second side of the groove along the thickness direction of the cover patch is closed, the identification body is attached to the inner wall of the groove along the thickness direction of the cover patch, and at least a part of the identification body is attached to the inner wall of the groove in a direction perpendicular to the thickness direction of the cover patch.

[0020] In this way, it is beneficial to improve the insulation performance of the patch body, reduce the probability of short circuit caused by the contact between the cover and the external environment, keep the relative position between the identification body and the groove stable, reduce the probability of the identification body detaching from the groove, and improve the durability.

[0021] In some embodiments, at least two through holes are provided on the background surface, the two through holes are spaced along a first direction, the first direction is perpendicular to the thickness direction of the cover patch, the through holes penetrate the cover patch along the thickness direction of the cover patch, the through holes are used for passing through the pole columns of the battery cells, the number of the identification surfaces is two, and are respectively used to form patterns for distinguishing the positive and negative poles, and the identification surfaces are located on one side of one through hole away from the other through hole. In this way, it is beneficial for the patterns of the positive and negative poles formed by the identification surfaces to be close to the corresponding through holes respectively, making the indication function of the identification surfaces more obvious, and reducing the probability of the safety risk of reverse connection of the electrodes of the battery cell;

[0022] Or, the identification surface is located on one side of the through hole along a second direction, the first direction, the second direction and the thickness direction of the cover patch are perpendicular to each other. In this way, the corresponding relationship between the identification surface forming the positive and negative pole patterns and the corresponding positive and negative poles can be enhanced, making the indication function of the identification surface more obvious, and reducing the probability of the safety risk of reverse connection of the electrodes of the battery cell;

[0023] Or, the connection line of the geometric centers of the two through holes is a first reference line, the perpendicular bisector of the first reference line is a second reference line, one identification surface is located between the second reference line and one through hole, and the other identification surface is located between the second reference line and the other through hole. In this way, the two identification surfaces are respectively close to the through holes corresponding to the positive and negative pole columns of the battery cell, making the indication function of the identification surface more obvious and reducing the probability of the safety risk of short circuit between the positive and negative poles of the battery cell.

[0024] An embodiment of the present invention provides a cover patch for attaching to the surface of the cover of a battery cell. The outer surface of the first side of the cover patch along its thickness direction includes an identification surface and a background surface. Both the identification surface and the background surface are used to form the appearance surface of the battery cell, and the identification surface is used to form a recognizable pattern;

[0025] The cover patch includes a patch body and an identification body. The patch body is provided with a groove that is open on a first side in the thickness direction of the cover patch. The identification body is disposed in the groove, and a surface of the identification body on the first side in the thickness direction of the cover patch forms the identification surface, and a surface of the patch body on the first side in the thickness direction of the cover patch forms the background surface;

[0026] The background surface protrudes from the identification surface in the thickness direction.

[0027] The cover patch provided by the embodiment of the present invention can form a recognizable pattern to identify the battery cell by setting an identification surface on the cover patch to transmit information about the battery cell; the identification surface is formed by a solid structure on one surface of the cover patch in the thickness direction, rather than holes formed in a hollowing-out manner, so that when the cover patch is attached to the cover, the probability that a part of the cover is directly exposed to the outside is reduced, which is beneficial to reducing the probability of the battery cell generating safety risks and improving the insulation performance of the battery cell; through the cooperation of the identification body and the groove, the recognition degree of the identification surface can be improved; the inner wall of the groove can play a role in stopping and shielding the identification body, reducing the risk that the identification body is worn and not conducive to identification after long-term use, which is beneficial to improving the durability of the identification surface, and further beneficial to improving the durability of the battery cell; the background surface of the patch body protrudes from the identification surface of the identification body, reducing the direct contact and friction between the identification surface and the outside, and thus being able to reduce the wear speed of the identification surface and improve the durability of the identification surface.

[0028] In some embodiments, the identification body is a printing layer formed by a printing process. In this way, the printing process is mature and simple, suitable for mass production. The identification body is formed in the groove by the printing process, which can improve the recognition degree of the identification surface and increase the thickness of the identification body, thereby improving its durability;

[0029] Or, the identification body is a coding layer formed by a coding process. In this way, the coding process is mature and simple, suitable for mass production. By using the coding process, the coding layer can be conveniently adjusted, and thus the pattern formed on the identification surface can be conveniently adjusted, so that the identification surface can conveniently form different patterns according to different requirements, which is beneficial to improving the production efficiency of the cover patch and further beneficial to improving the production efficiency of the battery cell.

[0030] In some embodiments, the identification surface is the surface of an indentation formed by an embossing process. In this way, the embossing process for forming the identification surface is mature and simple, facilitating mass and rapid production, and being beneficial to improving the durability of the identification surface;

[0031] Or, the identification surface is the surface of an etching mark formed by an etching process. In this way, the recognition degree and durability of the identification surface can be improved, and the weight of the identification body can be reduced, which is beneficial to reducing the weight of the cover patch.

[0032] In some embodiments, the second side of the groove along the thickness direction of the cover patch is closed, the identification body is attached to the inner wall of the groove along the thickness direction of the cover patch, and at least a part of the identification body is attached to the inner wall of the groove in a direction perpendicular to the thickness direction of the cover patch.

[0033] In this way, it is beneficial to improve the insulation performance of the patch body, reduce the probability of short circuit caused by the contact between the cover and the external environment, keep the relative position between the identification body and the groove stable, reduce the probability of the identification body detaching from the groove, and improve the durability.

[0034] An embodiment of the present invention provides a battery, which includes a box body and the battery cell described above. An installation space is provided in the box body, and the battery cell is arranged in the installation space.

[0035] By adopting the battery cell in the foregoing embodiment, the battery provided by the embodiment of the present invention is beneficial to improve the insulation performance of the battery, and further reduce the probability of safety risks of the battery.

[0036] An embodiment of the present invention further provides an electrical device, including the battery described above, and the battery is used as the power source of the electrical device.

[0037] By using the battery in the foregoing embodiment as the power source, the electrical device provided by the embodiment of the present invention can reduce the probability of safety risks such as short circuit of the electrical device and improve the safety of using the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of an electrical device being a vehicle in an embodiment of the present invention;

[0039] Figure 2 Schematic diagram of a battery in an embodiment of the present invention;

[0040] Figure 3 Exploded schematic diagram of a battery cell in an embodiment of the present invention;

[0041] Figure 4 Schematic diagram of the first perspective of a cover patch in the first embodiment of the present invention;

[0042] Figure 5 Schematic diagram of a cover patch in the second embodiment of the present invention;

[0043] Figure 6 For Figure 4 Cross-sectional schematic diagram at the A-A position in

[0044] Figure 7 This is a sectional view of the cover patch in the third embodiment of the present utility model, and the sectional position is the same as that at Figure 4 position A-A in

[0045] Figure 8 is Figure 6 an enlarged view of position B in

[0046] Figure 9 is Figure 7 an enlarged view of position C in

[0047] Figure 10 This is a partially enlarged sectional view of the cover patch in the fourth embodiment of the present utility model, and the enlarged position is the same as that at Figure 6 position B in

[0048] Figure 11 This is a partially enlarged sectional view of the cover patch in the fifth embodiment of the present utility model, and the enlarged position is the same as that at Figure 6 position B in

[0049] Figure 12 This is a schematic view of the cover patch in the sixth embodiment of the present utility model;

[0050] Figure 13 This is a schematic view of the cover patch in the seventh embodiment of the present utility model;

[0051] Figure 14 This is a schematic view of the cover patch in the eighth embodiment of the present utility model.

[0052] Explanation of reference numerals

[0053] 1000, vehicle; 100, battery; 200, controller; 300, motor; 10, battery cell; 11, housing; 12, terminal post; 20, cover; 20a, identification surface; 20b, background surface; 30, cover patch; 31, patch body; 40, box body; 41, top cover; 42, bottom cover; 50, identification body; 50a, groove; 50b, through hole; 70, printing layer; 80, inkjet coding layer. Detailed implementation manners

[0054] It should be noted that, without conflict, the embodiments in the present utility model and the technical features in the embodiments can be combined with each other. The detailed description in the detailed implementation manners should be understood as an explanatory illustration of the purpose of the present utility model and should not be regarded as an improper limitation of the present utility model.

[0055] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meanings as those commonly understood by those skilled in the technical field to which this utility model belongs; the terms used in this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model; the terms "including" and "having" and any variations thereof in the description of the specification and the above-mentioned drawings of this utility model are intended to cover non-exclusive inclusion.

[0056] In the description of the embodiments of this utility model, technical terms such as "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this utility model, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0057] Referring to "embodiments" in this utility model means that specific features, structures or characteristics described in combination with the embodiments can be included in at least one embodiment of this utility model. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this utility model can be combined with other embodiments.

[0058] In the description of the embodiments of this utility model, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this utility model generally represents an "or" relationship between the associated objects before and after.

[0059] In the description of the embodiments of this utility model, for the sake of convenience of description, as Figure 3 and Figure 6 shown by the arrows in Figure 11 and Figure 12 the direction where the arrow X is located is the thickness direction of the cover plate patch, and as

[0060] shown by the arrows in

[0061] In the description of the embodiments of the present utility model, unless otherwise clearly defined and limited, the technical term "contact" should be understood in a broad sense, which may be direct contact, or contact through an intermediate medium layer, which may be contact with substantially no mutual force between the two in contact, or contact with mutual force between the two in contact.

[0062] At present, batteries are more and more widely used in life and industry. Batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric vehicles, as well as in many fields such as aerospace. With the continuous expansion of the application fields of batteries, the market demand is also increasing continuously.

[0063] Figure 2 Schematic diagram of the battery 100 provided by the embodiments of the present utility model. As Figure 2 shown, the battery 100 includes a box body 40 and at least one battery cell 10.

[0064] The box body 40 includes a top cover 41 and a bottom cover 42. The top cover 41 covers above the bottom cover 42, so as to enclose an installation space for placing the battery cell 10 between the bottom cover 42 and the top cover 41.

[0065] In the battery 100, there may be multiple battery cells 10. The multiple battery cells 10 can be connected in series, in parallel or in a mixed connection. The mixed connection means that there are both series and parallel connections among the multiple battery cells 10. The multiple battery cells 10 can be directly connected in series, in parallel or in a mixed connection together, and then the whole formed by the multiple battery cells 10 is placed in the accommodation space formed by the bottom cover 42 and the top cover 41; of course, the battery 100 can also be that multiple battery cells 10 are first connected in series, in parallel or in a mixed connection to form a battery module form, and then multiple battery modules are connected in series, in parallel or in a mixed connection to form a whole and are accommodated in the accommodation space formed by the bottom cover 42 and the top cover 41. The battery 100 may further include other structures. For example, the battery 100 may further include a busbar component for realizing the electrical connection between the multiple battery cells 10.

[0066] In the embodiment of the present utility model, the battery cell 10 involved includes a housing 11, an electrode assembly, and an electrolyte, and the electrode assembly and the electrolyte are arranged inside the housing 11. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell 10 mainly operates by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the coated positive electrode active material layer protrudes from the current collector with the coated positive electrode active material layer, and the stacked current collectors without the coated positive electrode active material layer serve as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the coated negative electrode active material layer protrudes from the current collector with the coated negative electrode active material layer, and the stacked current collectors without the coated negative electrode active material layer serve as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a wound structure or a stacked structure.

[0067] The battery cell 10 can be a secondary battery, and a secondary battery refers to a battery cell 10 that can be activated by charging after discharging to continue to be used.

[0068] The battery cell 10 can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiment of the present utility model does not limit this.

[0069] The battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc. The embodiment of the present utility model has no special limitation.

[0070] The battery 100 involved in the embodiment of the present utility model refers to a single physical module including one or more battery cells 10 to provide a higher voltage and capacity.

[0071] In the embodiments of the present utility model, the electrical device involved is powered by the above-mentioned battery. The electrical device can be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecrafts, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, electric airplane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.

[0072] In the following embodiments, for the convenience of description, the electrical device of an embodiment of the present utility model is taken as an example of a vehicle 1000 for illustration. The following is described with reference to the accompanying drawings.

[0073] Figure 1 FIG. 7 is a schematic structural diagram of a vehicle 1000 provided by an embodiment of the present utility model. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. As Figure 1 shown, a battery 100 is disposed inside the vehicle 1000. The battery 100 can be disposed at the bottom, head or tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000. For example, the battery 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0074] In some embodiments of the present utility model, the battery 100 can not only be used as an operating power source of the vehicle 1000, but also as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0075] Next, the embodiments of the present utility model will be described in detail.

[0076] The battery cell includes a cover plate patch made of an insulating material and a cover plate made of a metal material. The cover plate patch is attached to the cover plate to reduce the probability of short circuit caused by the contact between the cover plate and the outside world. The cover plate patch has an identification area to play roles such as indication and warning.

[0077] In the related art, in order to facilitate the identification of the identification area on the battery cell, the identification area of the cover plate patch is hollowed out to form a pattern with corresponding functions. However, a part of the cover plate can be in contact with the outside world through the hollowed-out position, thereby increasing the short-circuit risk and further reducing the insulation performance of the battery cell.

[0078] Based on the above technical problems, an embodiment of the present utility model provides a battery cell. The battery cell includes a cover plate and a cover plate patch. The outer surface of the first side of the cover plate patch along its thickness direction includes an identification surface and a background surface. A pattern for identification is formed through the identification surface, and the identification surface and the background surface are not coplanar. The cover plate patch includes a patch body and an identification body. The patch body is provided with a groove, and the identification body is arranged in the groove. The patch body is provided with a background surface, and the identification body is provided with an identification surface. The background surface protrudes from the identification surface along the thickness direction of the cover plate patch. In this way, the hollowed-out area eliminated on the cover plate patch is beneficial to reducing the probability of short circuit between the cover plate and the outside. By using the identification surface for identification, information about the battery cell can be transmitted, which is beneficial to reducing the probability of safety risks of the battery cell.

[0079] An embodiment of the present utility model provides a battery cell 10. Refer to Figure 3 and Figure 4 , the battery cell 10 includes a cover plate 20 and a cover plate patch 30. The outer surface of the first side of the cover plate patch 30 along its thickness direction includes an identification surface 20a and a background surface 20b. The surface of the second side of the cover plate patch 30 along its thickness direction is attached to the surface of the cover plate 20. The identification surface 20a and the background surface 20b form the appearance surface of the battery cell 10, and the identification surface 20a is used to form a pattern for identification. The cover plate patch 30 includes a patch body 31 and an identification body 50. The patch body 31 is provided with a groove 50a, and the groove 50a is open on the first side along the thickness direction of the cover plate patch 30. The identification body 50 is arranged in the groove 50a. The surface of the first side of the identification body 50 along the thickness direction of the cover plate patch 30 forms the identification surface 20a, and the surface of the first side of the patch body 31 along the thickness direction of the cover plate patch 30 forms the background surface 20b. The background surface 20b protrudes from the identification surface 20a along the thickness direction of the cover plate patch 30.

[0080] The first side refers to one of the two sides of the cover plate patch 30 along its thickness direction.

[0081] The appearance surface of the battery cell 10 refers to the surface directly presented to the outside of the battery cell 10. The identification surface 20a and the background surface 20b are used to form a part of the appearance surface of the battery cell 10.

[0082] It should be noted that the pattern for identification means that the pattern can be identified by people, machines, etc.

[0083] The identification surface 20a and the background surface 20b are not coplanar to distinguish the identification surface 20a from the background surface 20b.

[0084] The identification surface 20a can form a specific type of pattern for identification, so as to play roles such as indication and warning through the identification surface 20a.

[0085] It should be noted that the identification surface 20a and the background surface 20b can be such that the identification surface 20a and the background surface 20b are respectively located on different parallel surfaces, so that the identification surface 20a can form a recognizable pattern; or the identification surface 20a can be inclined relative to the background surface 20b, that is, the plane where the identification surface 20a is located intersects with the plane where the background surface 20b is located, and the angle between the identification surface 20a and the background surface 20b can enable a recognizable pattern to be formed by comparing the identification surface 20a and the background surface 20b.

[0086] The identification body 50 is disposed in the groove 50a. In the direction perpendicular to the thickness direction of the cover patch 30, the side wall of the groove 50a perpendicular to the thickness direction of the cover patch 30 can stop the identification body 50 and reduce the movement of the identification body 50.

[0087] The battery cell 10 provided by the embodiment of the present utility model can form a recognizable pattern on the battery cell 10 by setting the identification surface 20a on the cover patch to transmit information about the battery cell 10; the identification surface 20a is formed by the one-side surface of the solid structure identification body 50 along the thickness direction of the cover patch 30, rather than the hole formed in a hollowing-out manner. Thus, when the cover patch 30 is attached to the cover 20, the probability that a part of the cover 20 is directly exposed to the outside is reduced, which is beneficial to reducing the probability of the battery cell 10 generating safety risks and improving the insulation performance of the battery cell 10; through the cooperation of the identification body 50 and the groove 50a, the recognition degree of the identification surface 20a can be improved; the inner wall of the groove 50a can play a role in stopping and blocking the identification body 50, reducing the risk that the identification body 50 is worn after long-term use and is not conducive to recognition, which is beneficial to improving the durability of the identification surface, and further beneficial to improving the durability of the battery cell; the background surface 20b of the patch body 31 protrudes from the identification surface 20a of the identification body 50, so that the direct contact and friction between the identification surface 20a and the outside are reduced, and thus the wear speed of the identification surface 20a can be reduced and the durability of the identification surface 20a can be improved.

[0088] It should be noted that the identification surface 20a can be formed by all the surfaces on the first side of the identification body 50 along the thickness direction of the cover patch 30, or the identification surface 20a can be formed by a part of the surfaces on the first side of the cover patch 30 along the thickness direction.

[0089] The specific use of the pattern formed on the identification surface 20a for identification is not limited. For example, it can be symbols indicating the positive electrode of the battery cell 10, symbols of the negative electrode, identification codes, warning signs, etc. By identifying the positive electrode symbol and the negative electrode symbol, the positive and negative electrodes of the battery cell 10 can be identified, which is beneficial to recognizing the positive and negative electrodes of the battery cell 10 and reducing the probability of safety risks such as reverse electrode connection during the production or use of the battery cell 10. By identifying the identification code of the battery cell 10, it is convenient to control the production process of each battery cell 10 during the production of the battery cell 10, improving the safety during the production and assembly of the battery cell 10. By identifying the warning sign of the battery cell 10, it is beneficial to prompt the possible safety risks of the battery cell 10, thereby reducing the probability of safety accidents. Through the contrast difference in colors, the identification surface 20a can also be distinguished from the background surface 20b to form a pattern for identification.

[0090] In some embodiments, the identification surface at least includes a first color, and the background surface has a second color, and the first color is different from the second color.

[0091] It can be understood that through the contrast between the first color and the second color, the identification surface 20a can be distinguished from the background surface 20b so that the identification surface 20a can form a pattern for identification.

[0092] The identification surface 20a and the background surface 20b are not coplanar. The background surface 20b protrudes from the identification surface 20a in the thickness direction. The colors of the identification surface 20a and the background surface 20b can be the same or different. The identification surface 20a can form a pattern for identification through the dimensional difference in the thickness direction of the cover plate patch 30. On this basis, through the color difference between the identification surface 20a and the background surface 20b, the identifiability of the pattern can be further improved.

[0093] In this way, it is beneficial to improve the recognition rate of the identification surface 20a, beneficial to indicating more information through different colors, increasing the information density of the pattern formed on the identification surface 20a, and saving the area required for the identification surface 20a.

[0094] In some embodiments, referring to Figure 4 , a single identification surface 20a forms a pattern for identification.

[0095] For example, the shape of one identification surface 20a is cross-shaped to correspond to the through hole 50b through which the positive electrode post passes, and the shape of another identification surface 20a is linear to correspond to the through hole 50b through which the negative electrode post passes.

[0096] In this way, it is beneficial to reduce the manufacturing process steps of the identification surface 20a and reduce the manufacturing cost.

[0097] In some embodiments, see Figure 5, Multiple identification surfaces 20a are combined to form a recognizable pattern.

[0098] Multiple grooves 50a are provided on the cover plate patch 30, and an identification body 50 is correspondingly arranged in each groove 50a. The multiple identification surfaces 20a formed by the multiple identification bodies 50 in the multiple grooves 50a are combined to form a recognizable pattern.

[0099] The multiple identification surfaces 20a are arranged according to the shape of the pattern to form a recognizable pattern by combination. For example, Figure 5 A part of the multiple identification surfaces is combined to form a pattern approximately in the shape of a cross to identify the positive electrode, and another part of the multiple identification surfaces is combined to form a pattern approximately in the shape of a straight line to identify the negative electrode.

[0100] In this way, it is beneficial to improve the recognizability of the formed recognizable pattern, and can also enhance the durability of the identification surface 20a and extend its service life.

[0101] Multiple means at least two.

[0102] In some embodiments, referring to Figure 6 、 Figure 8 And Figure 10 , The identification body 50 is a printed layer 70 formed by a printing process.

[0103] The groove 50a is non-penetratingly arranged on the patch body 31. By transferring ink or the like into the groove 50a during the printing process, a printed layer 70 is formed on the surface of the first side of the groove 50a along the thickness direction of the cover plate patch 30. The printed layer 70 is the identification body 50, and the surface of the first side of the identification body 50 along the thickness direction of the cover plate patch 30 forms the identification surface 20a.

[0104] In this way, the printing process is mature and simple, suitable for mass production. The identification body 50 is formed in the groove 50a by the printing process, which can improve the recognizability of the identification surface 20a and increase the thickness of the identification body 50, thereby improving its durability.

[0105] In some embodiments, referring to Figure 6 、 Figure 8 And Figure 10 , The identification body 50 is a spray code layer 80 formed by a spray code process.

[0106] The groove 50a is non-penetratingly arranged on the patch body 31. An oil film, pigment, etc. are sprayed into the groove 50a to form a spray code layer 80 of the background surface 20b on the surface of the first side of the groove 50a along the thickness direction of the cover plate patch 30. The surface of the first side of the spray code layer 80 along the thickness direction of the cover plate patch 30 is the identification surface 20a.

[0107] Thus, the inkjet printing process is mature and simple, suitable for mass production. By using the inkjet printing process, the inkjet layer 80 can be conveniently adjusted, and then the pattern formed on the marking surface 20a can be conveniently adjusted, so that the marking surface 20a can easily form different patterns according to different requirements, which is beneficial to improving the production efficiency of the cover plate patch 30, and further beneficial to improving the production efficiency of the battery cell 10.

[0108] In some embodiments, referring to Figure 11 , the marking surface 20a is the surface of the indentation formed by the embossing process.

[0109] A groove 50a is formed on the patch body 31, and then the blank of the marking body 50 is placed into the groove 50a, and pressure is applied to the blank of the marking body 50. Under the action of the pressure, at least part of the blank of the marking body 50 under pressure is compressed or deformed, so that the dimension in the thickness direction changes until the background surface 20b protrudes from at least part of the surface on the first side of the blank of the marking body 50 in the thickness direction, thereby forming an indentation. The surface of the indentation on the marking body 50 along the first side in the thickness direction of the cover plate patch 30 is the marking surface 20a.

[0110] Thus, the embossing process for forming the marking surface 20a is mature and simple, facilitating mass and rapid production, and is beneficial to improving the durability of the marking surface 20a.

[0111] In some embodiments, referring to Figure 11 , the marking surface 20a is the surface of the etching mark formed by the etching process.

[0112] A groove 50a is formed on the patch body 31, and then the blank of the marking body 50 is placed into the groove 50a.

[0113] Part of the material on the outer surface of the blank of the marking body 50 along the first side in the thickness direction of the cover plate patch 30 is removed by chemical reaction etching, heat source ablation, tool scratching, etc. to form an etching mark until the background surface 20b protrudes from at least part of the surface on the first side of the blank of the marking body 50 in the thickness direction. The surface of the etching mark along the first side in the thickness direction of the cover plate patch 30 is the marking surface 20a.

[0114] Specifically, the etching process is a laser process. By laser irradiating the outer surface of the marking body 50 along the first side in the thickness direction, part of its material is melted, vaporized and peeled off to form an etching mark, and the surface of the etching mark is the marking surface 20a.

[0115] Thus, the recognition and durability of the marking surface 20a can be improved, and the weight of the marking body 50 can be reduced, which is beneficial to reducing the weight of the cover plate patch 30, and further beneficial to reducing the weight of the battery cell 10.

[0116] In some embodiments, referring to Figure 7 AndFigure 9 The groove 50a penetrates through the cover patch 30 in the thickness direction of the cover patch 30, and the identification body 50 fills the groove 50a.

[0117] It should be noted that the identification body 50 fills the groove 50a to seal the groove 50a in the direction perpendicular to the thickness direction of the cover patch 30, so as to be able to separate the cover 20 from the external environment, which is beneficial to reducing the probability of short - circuit caused by the contact between the cover 20 and the external environment.

[0118] In this way, by providing the penetrating groove 50a, the internal stress of the cover patch 30 can be reduced, and at the same time, space can be reserved for the deformation of the cover patch 30 during thermal expansion and contraction, reducing the influence of thermal expansion and contraction on the cover patch 30. The groove 50a can stop the identification body 50 to reduce the probability of the identification body 50 moving.

[0119] In some embodiments, both the identification body 50 and the patch body 31 are made of insulating materials.

[0120] In this way, it is beneficial to isolate the cover 20 from the outside world and reduce the probability of short - circuit between the cover 20 and the outside world.

[0121] It can be understood that the specific form of the insulating material is not limited. For example, rubber, plastic, glass, ceramics, etc.

[0122] In some embodiments, the second side of the groove 50a in the thickness direction of the cover patch 30 is closed, the identification body 50 fits against the inner wall of the groove 50a in the thickness direction of the cover patch 30, and at least part of the identification body 50 fits against the inner wall of the groove 50a in the direction perpendicular to the thickness direction of the cover patch 30.

[0123] The second side of the groove 50a in the thickness direction of the cover patch 30 being closed is beneficial to improving the insulation performance of the patch body 31 and reducing the probability of the risk of short - circuit caused by the contact between the cover 20 and the external environment.

[0124] By at least part of the identification body 50 fitting against the inner wall of the groove 50a, in the direction perpendicular to the thickness direction of the cover patch 30, a frictional force in the thickness direction of the cover patch 30 can be generated between at least part of the identification body 50 and the inner wall of the groove 50a to fix the identification body 50, so that the relative position between the identification body 50 and the inner wall of the groove 50a can be kept stable, which is beneficial to reducing the probability of the identification body 50 detaching from the groove 50a and improving durability.

[0125] In this way, it is beneficial to improving the insulation performance of the patch body 31 and reducing the probability of the risk of short - circuit caused by the contact between the cover 20 and the external environment; it is beneficial to keeping the relative position between the identification body 50 and the groove 50a stable; it is beneficial to reducing the probability of the identification body 50 detaching from the groove 50a and improving durability.

[0126] In some embodiments, the identification surface 20a further includes a third color, which is different from the first color and the second color.

[0127] It can be understood that a part of the identification surface 20a can have the first color, while another part has the third color, so that the recognition rate of the identification surface 20a can be increased; there can be multiple identification surfaces 20a, a part of the identification surfaces are of the first color, and another part of the identification surfaces are of the third color, so that the recognition rate between the identification surfaces 20a can be enhanced.

[0128] In this way, by setting different colors for the identification surface 20a, the recognition rate of the identification surface 20a can be improved, and more information can be indicated through different colors, the information density of the pattern formed by the identification surface 20a can be increased, and the area required for the identification surface 20a can be saved.

[0129] In some embodiments, referring to Figure 12 , at least two through holes 50b are provided on the background surface 20b, and the two through holes 50b are spaced along a first direction, the first direction is perpendicular to the thickness direction of the cover plate patch 30, the through holes 50b penetrate the cover plate patch 30 along the thickness direction of the cover plate patch 30, the through holes 50b are used for passing through the pole posts 12 of the battery cell 10, the number of the identification surfaces 20a is two, and are respectively used to form patterns for distinguishing the positive and negative poles, and the identification surfaces 20a are located on one side of one through hole 50b away from the other through hole 50b.

[0130] That is to say, the patterns of the two identification surfaces 20a are not the same.

[0131] It can be understood that the pole post 12 includes a positive pole post and a negative pole post. After the assembly of the battery cell 10 is completed, the identification surface 20a for forming the pattern of identifying the positive pole is located on the side of the through hole 50b penetrated by the positive pole post away from the through hole 50b penetrated by the negative pole post, and the identification surface 20a for forming the pattern of identifying the negative pole is located on the side of the through hole 50b penetrated by the negative pole post of the battery cell 10 away from the through hole 50b penetrated by the positive pole post of the battery cell 10.

[0132] In this way, it is beneficial for the patterns of the positive and negative poles respectively formed by the identification surface 20a to be close to their corresponding through holes 50b, which is beneficial to making the indication function of the identification surface 20a more obvious, and can reduce the probability of the safety risk of reverse electrode connection of the battery cell 10.

[0133] In some embodiments, referring to Figure 13 , the identification surface 20a is located on one side of the through hole 50b along a second direction, and the first direction, the second direction and the thickness direction of the cover plate patch 30 are perpendicular to each other.

[0134] It should be noted that in the second direction, one identification surface 20a can be disposed on one side of a through hole 50b, and the other identification surface 20a can be disposed on the same side or the other side of another through hole 50b.

[0135] In this way, the correspondence between the identification surfaces 20a forming the positive and negative electrode patterns and the corresponding positive and negative electrodes can be enhanced, which is beneficial to making the indication function of the identification surfaces 20a more obvious and can reduce the probability of the safety risk of reverse electrode connection of the battery cell 10.

[0136] In some embodiments, referring to Figure 14 , the line connecting the geometric centers of the two through holes 50b is the first reference line, and the perpendicular bisector of the first reference line is the second reference line. One identification surface 20a is located between the second reference line and one through hole 50b, and the other identification surface 20a is located between the second reference line and the other through hole 50b.

[0137] Figure 14 In

[0138] , the dashed line D represents the first reference line, and the dashed line C represents the second reference line.

[0139] In some embodiments, referring to Figure 3 , the cover plate 20 is attached to the second side of the cover plate patch 30 along the thickness direction of the cover plate patch 30.

[0140] The first side and the second side are opposite sides in the thickness direction of the cover plate patch 30.

[0141] In this way, the identification surface on the cover plate patch 30 can have a larger area, thereby improving the visibility of the identification surface 20a.

[0142] The specific description of the battery cell 10 provided by the embodiment of the present utility model is as follows. Refer to Figure 3 、 Figure 4 、 Figure 6 、 Figure 8 、 Figure 10 and Figure 14 .

[0143] The battery cell 10 includes a cover plate 20 and a cover plate patch 30. The outer surface of the first side of the cover plate patch 30 along its thickness direction includes an identification surface 20a and a background surface 20b. The surface of the second side of the cover plate patch 30 along its thickness direction is attached to the surface of the cover plate 20. The identification surface 20a and the background surface 20b form the appearance surface of the battery cell 10, and the identification surface 20a is used to form a recognizable pattern. The identification surface 20a includes a first color, the background surface 20b has a second color, and the first color is different from the second color. The identification surface 20a further includes a third color, and the third color is different from the first color and the second color. The cover plate patch 30 includes a patch body 31 and an identification body 50. The patch body 31 is provided with a groove 50a, and the groove 50a opens towards the first side of the cover plate patch 30 along its thickness direction. The identification body 50 is arranged in the groove 50a. The identification body 50 is an inkjet layer 80 formed by an inkjet process. The inkjet layer 80 forms the identification surface 20a on the surface of the first side of the cover plate patch 30 along its thickness direction, and the surface of the first side of the patch body 31 along the thickness direction of the cover plate patch 30 forms the background surface 20b. The background surface 20b protrudes from the identification surface 20a along the thickness direction. Both the identification body 50 and the patch body 31 are made of insulating materials. The groove 50a is closed on the second side of the cover plate patch 30 along its thickness direction, and the identification body 50 fits with the inner wall of the groove 50a along the thickness direction of the cover plate patch 30. In the direction perpendicular to the thickness direction of the cover plate patch 30, the identification body 50 fits with the inner wall of the groove 50a. The background surface 20b is provided with at least two through holes 50b, and the two through holes 50b are spaced along a first direction. The first direction is perpendicular to the thickness direction of the cover plate patch 30. The through holes 50b penetrate the cover plate patch 30 along the thickness direction of the cover plate patch 30. The through holes 50b are used to pass through the pole posts 12 of the battery cell 10. The number of the identification surfaces 20a is two, and the identification surfaces 20a are used to form patterns for distinguishing the positive and negative poles. The connection line of the geometric centers of the two through holes 50b is a first reference line, and the perpendicular bisector of the first reference line is a second reference line. One identification surface 20a is located between the second reference line and one through hole 50b, and the other identification surface 20a is located between the second reference line and the other through hole 50b.

[0144] An embodiment of the present utility model provides a cover plate patch 30. Refer to Figure 4, for attaching to the surface of the cover plate 20 of the battery cell 10. The outer surface of the first side of the cover plate patch 30 along its thickness direction includes an identification surface 20a and a background surface 20b. Both the identification surface 20a and the background surface 20b are used to form the appearance surface of the battery cell 10. The identification surface 20a is used to form a recognizable pattern. The identification surface 20a and the background surface 20b are not coplanar; the cover plate patch 30 includes a patch body 31 and an identification body 50. The patch body is provided with a groove 50a. The groove 50a is open on the first side along the thickness direction of the cover plate patch 30. The identification body 50 is arranged in the groove 50a. The surface of the identification body 50 on the first side along the thickness direction of the cover plate patch 30 forms the identification surface 20a. The surface of the patch body 31 on the first side along the thickness direction of the cover plate patch 30 forms the background surface 20b; the background surface 20b protrudes from the identification surface 20a along the thickness direction of the cover plate patch 30.

[0145] The cover plate patch 30 provided by the embodiment of the present utility model can form a recognizable pattern to identify the battery cell 10 by setting the identification surface 20a on the cover plate patch, so as to transmit information about the battery cell 10; the identification surface 20a is formed by the surface of the solid structure identification body 50 on one side along the thickness direction of the cover plate patch 30, rather than the holes formed in a hollowed-out manner. Thus, when the cover plate patch 30 is attached to the cover plate 20, the probability that a part of the cover plate 20 is directly exposed to the outside is reduced, which is beneficial to reducing the probability of the battery cell 10 generating safety risks and improving the insulation performance of the battery cell 10; through the cooperation of the identification body 50 and the groove 50a, the recognition rate of the identification surface 20a can be improved; the inner wall of the groove 50a can play a role in stopping and blocking the identification body 50, reducing the risk that the identification body 50 is worn after long-term use and is not conducive to identification, which is beneficial to improving the durability of the identification surface, and further beneficial to improving the durability of the battery cell; the background surface 20b of the patch body 31 protrudes from the identification surface 20a of the identification body 50, so that the direct contact and friction between the identification surface 20a and the outside are reduced, and thus the wear speed of the identification surface 20a can be reduced, and the durability of the identification surface 20a can be improved.

[0146] In some embodiments, the identification surface at least includes a first color, and the background surface has a second color, and the first color is different from the second color.

[0147] In this way, it is beneficial to improve the recognition rate of the identification surface 20a, beneficial to indicate more information through different colors, improve the information density of the pattern formed by the identification surface 20a, and save the area required for the identification surface 20a.

[0148] In some embodiments, see Figure 6 、 Figure 8 and Figure 10, the identification body 50 is a printed layer 70 formed by a printing process. In this way, the printing process is mature and simple, suitable for mass production. The identification body 50 is formed in the groove 50a by the printing process, which can improve the recognizability of the identification surface 20a and increase the thickness of the identification body 50, thereby improving its durability.

[0149] Alternatively, the identification body 50 is a coding layer 80 formed by a coding process. In this way, the coding process is mature and simple, suitable for mass production. By using the coding process, the coding layer 80 can be conveniently adjusted, and thus the pattern formed on the identification surface 20a can be conveniently adjusted, enabling the identification surface 20a to form different patterns according to different requirements, which is beneficial to improving the production efficiency of the cover plate patch 30 and further beneficial to improving the production efficiency of the battery cell 10.

[0150] In some embodiments, the identification surface 20a further includes a third color, which is different from the first color and the second color.

[0151] In this way, by setting different colors on the identification surface 20a, the recognizability of the identification surface 20a can be improved, and more information can be indicated through different colors, increasing the information density of the pattern formed on the identification surface 20a and saving the area required for the identification surface 20a.

[0152] In some embodiments, referring to Figure 11 , the identification surface 20a is the surface of an indentation formed by an embossing process. In this way, the embossing process for forming the identification surface 20a is mature and simple, facilitating batch and rapid production, and beneficial to improving the durability of the identification surface 20a; or, the identification surface 20a is the surface of an etching mark formed by an etching process. In this way, the recognizability and durability of the identification surface 20a can be improved, the weight of the identification body 50 can be reduced, and it is beneficial to reduce the weight of the cover plate patch 30.

[0153] In some embodiments, the second side of the groove 50a along the thickness direction of the cover plate patch 30 is closed, and the identification body 50 is attached to the inner wall of the groove 50a along the thickness direction of the cover plate patch 30. In a direction perpendicular to the thickness direction of the cover plate patch 30, at least a part of the identification body 50 is attached to the inner wall of the groove 50a.

[0154] In this way, it is beneficial to improve the insulation performance of the patch body 31, reduce the probability of short - circuit risk caused by the cover plate 20 contacting the external environment; it is beneficial to keep the relative position between the identification body 50 and the groove 50a stable; it is beneficial to reduce the probability of the identification body 50 detaching from the groove 50a and improve durability.

[0155] An embodiment of the present invention further provides a battery 100. The battery 100 includes a box body 40 and the battery cell 10 according to any one of the above. An installation space is provided in the box body 40, and the battery cell 10 is arranged in the installation space.

[0156] The battery 100 provided by the embodiment of the present utility model adopts the battery cell 10 in the foregoing embodiment, which is beneficial to improving the insulation performance of the battery 100, and further can reduce the probability of safety risks occurring in the battery 100.

[0157] The embodiment of the present utility model further provides an electrical device, including the battery 100 in any one of the above, and the battery 100 is used as the power source of the electrical device.

[0158] The electrical device provided by the embodiment of the present utility model uses the battery 100 in the foregoing embodiment as the power source, which can reduce the probability of safety risks such as short circuit occurring in the electrical device and improve the safety of using the electrical device.

[0159] The various embodiments / embodiment modes provided by the present utility model can be combined with each other without contradiction.

[0160] The foregoing is only the preferred embodiment of the present utility model and is not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery cell, characterized in that: The battery cell comprises: Cover plate; A cover plate patch, wherein the outer surface of the first side of the cover plate patch along the thickness direction thereof comprises a logo surface and a background surface, the surface of the second side of the cover plate patch along the thickness direction thereof is attached to the surface of the cover plate, the logo surface and the background surface form the appearance surface of the battery cell, and the logo surface is used to form a pattern for identification; The cover patch includes a patch body and a logo body, the patch body is provided with a groove, the groove is open along a first side in the thickness direction of the cover patch, the logo body is arranged in the groove, the surface of the logo body along the first side in the thickness direction of the cover patch forms the logo surface, and the surface of the patch body along the first side in the thickness direction of the cover patch forms the background surface; The background surface protrudes from the logo surface along the thickness direction of the cover patch.

2. The battery cell according to claim 1, characterized in that: The identification surface is the surface of the indentation formed by the embossing process; Alternatively, the marking surface is the surface of the etched marks formed by an etching process.

3. The battery cell according to claim 1, characterized in that: The logo body is a printing layer formed by a printing process; Alternatively, the identification body is a coding layer formed by a coding process.

4. The battery cell according to claim 1, characterized in that: The identification body and the patch body are both made of insulating materials.

5. The battery cell according to claim 1, characterized in that: The groove is closed on the second side along the thickness direction of the cover patch, the logo body is fitted with the inner wall of the groove along the thickness direction of the cover patch, and in the direction perpendicular to the thickness direction of the cover patch, at least part of the logo body is fitted with the inner wall of the groove.

6. The battery cell according to claim 1, characterized in that: The background surface is provided with at least two through holes, the two through holes are spaced apart along a first direction, the first direction is perpendicular to the thickness direction of the cover patch, the through holes penetrate the cover patch along the thickness direction of the cover patch, the through holes are used to penetrate the poles of the battery cells, the number of the identification surfaces is two, and they are respectively used to form patterns for distinguishing the positive and negative poles, and the identification surface is located on a side of one of the through holes away from the other through hole; Alternatively, the identification surface is located on one side of the through hole along the second direction, and the first direction, the second direction and the thickness direction of the cover plate patch are perpendicular to each other; Alternatively, the line connecting the geometric centers of the two through holes is the first reference line, the perpendicular bisector of the first reference line is the second reference line, one identification surface is located between the second reference line and one through hole, and the other identification surface is located between the second reference line and the other through hole.

7. A cover plate patch, used for being attached to the surface of the cover plate of a battery cell, characterized in that: The outer surface of the first side of the cover plate patch along the thickness direction thereof includes a logo surface and a background surface, wherein both the logo surface and the background surface are used to form the appearance surface of the battery cell, and the logo surface is used to form a pattern for identification; The cover patch includes a patch body and a logo body, the patch body is provided with a groove, the groove is open along a first side in the thickness direction of the cover patch, the logo body is arranged in the groove, the surface of the logo body along the first side in the thickness direction of the cover patch forms the logo surface, and the surface of the patch body along the first side in the thickness direction of the cover patch forms the background surface; The background surface protrudes from the logo surface along the thickness direction.

8. The cover patch according to claim 7, characterized in that: The logo body is a printing layer formed by a printing process; Alternatively, the identification body is a coding layer formed by a coding process.

9. The cover patch according to claim 7, characterized in that: The identification surface is the surface of the indentation formed by the embossing process; Alternatively, the marking surface is the surface of the etched marks formed by an etching process.

10. The cover patch according to claim 7, characterized in that: The groove is closed on the second side along the thickness direction of the cover patch, the logo body is fitted with the inner wall of the groove along the thickness direction of the cover patch, and in the direction perpendicular to the thickness direction of the cover patch, at least part of the logo body is fitted with the inner wall of the groove.

11. A battery, characterized in that: The battery comprises a box body and a battery cell according to any one of claims 1 to 6, wherein an installation space is provided in the box body, and the battery cell is arranged in the installation space.

12. An electrical device, characterized in that: The battery according to claim 11 is used as a power source for the electrical device.

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