Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a battery box, a battery monomer and an adhesive. The single battery is arranged in the battery box and comprises a battery body and an insulating film, the battery body is provided with a mounting surface, the mounting surface is provided with an anti-explosion valve, and an avoiding space is formed in the position, corresponding to the anti-explosion valve, of the battery box; the insulating film at least partially covers the mounting surface, the insulating film is provided with an exposing hole for exposing the mounting surface, and the exposing hole and the explosion-proof valve are arranged in a staggered manner; the bonding glue is arranged corresponding to the exposing hole and is used for bonding the battery body and the battery box; the battery box comprises a box body and a supporting piece, and a supporting surface is arranged in the box body; the supporting piece is arranged on the supporting face, and the supporting piece and the supporting face define an avoiding space. The battery monomers are arranged in the box body, the exposing holes are arranged corresponding to the supporting pieces, and the bonding glue is used for bonding the battery body and the supporting pieces. According to the technical scheme, the bonding and fixing strength of the battery monomers in the battery box can be enhanced, and the mounting stability of the battery monomers is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical appliance. Background Technology

[0002] To reduce thermal runaway, some battery devices place explosion-proof valves at the bottom of individual battery cells. In this case, the battery box needs to be designed to prevent air leakage at the bottom of the explosion-proof valves, which affects the bonding area between the bottom of the battery cell and the battery box, resulting in lower bonding strength of the battery cell within the battery box. Utility Model Content

[0003] The main objective of this application is to provide a battery device that enhances the bonding and fixing strength of battery cells within the battery case and improves the stability of battery cell installation.

[0004] To achieve the above objectives, the battery device proposed in this application includes:

[0005] Battery box;

[0006] A battery cell, located inside a battery box, includes a battery body and an insulating film. The battery body has a mounting surface with an explosion-proof valve. The battery box has clearance space corresponding to the explosion-proof valve. The insulating film at least partially covers the mounting surface and has an exposure hole revealing the mounting surface. The exposure hole is offset from the explosion-proof valve.

[0007] Adhesive is applied to the exposed holes and is used to bond the battery body to the battery box.

[0008] The battery box includes a box body and a support member. The box body has a support surface. The support member is located on the support surface, and the support member and the support surface are configured to form a clearance space. The battery cell is located in the box body, and the exposed hole is set corresponding to the support member. The battery body and the support member are bonded together with adhesive.

[0009] The battery device in this application features exposed holes in the insulating film, allowing partial exposure of the battery body's mounting surface. This enables direct bonding of the battery body to the battery case with adhesive. In this case, individual battery cells do not need to be bonded to the battery case via the insulating film. Furthermore, the bonding strength between the battery body and the battery case is higher than that between the insulating film and the battery case, thus enhancing the bonding strength of the battery cells within the battery case and improving the stability of the battery cell installation. Further, by configuring the battery case to include a case body and supporting members, forming a clearance space, the wall thickness of the case body does not need to be excessive, thereby improving the lightweight effect of the battery case and reducing its manufacturing cost.

[0010] In some embodiments, the insulating film is provided with at least two exposure holes, which are distributed on both sides of the explosion-proof valve in the first direction;

[0011] The number of support members is at least two, and the at least two support members are arranged side by side at intervals along the first direction;

[0012] Two adjacent support members are configured to form a clearance space with the support surface, and are respectively set to correspond to the exposed holes on both sides of the battery cell in the first direction.

[0013] This allows both ends of the battery cell to be bonded and fixed along its length, thereby improving the stability of the battery cell bonding within the battery box.

[0014] In some embodiments, in the first direction, the length of the support member is defined as L1, and the length of the exposed hole is defined as L2, satisfying the relationship: L1 > L2;

[0015] And / or, in the first direction, the exposed holes on both sides of the explosion-proof valve are symmetrically arranged.

[0016] This allows the portion of the insulating film that encloses the exposed holes to be held in place by the support, reducing the possibility of warping. Simultaneously, it ensures that the battery cells receive uniform adhesive force at both ends along their length, improving the stability of the battery cell bonding within the battery case.

[0017] In some embodiments, the number of battery cells is at least two, and the at least two battery cells are arranged along a second direction to form a battery cell assembly, wherein the second direction intersects the first direction;

[0018] The support members extend along the second direction, and two adjacent support members are respectively arranged to correspond to the exposed holes on both sides of each battery cell in the battery cell assembly in the first direction.

[0019] This allows each battery cell in the battery cell assembly to share two adjacent support members for installation, thereby reducing the number of support members and simplifying the structure of the battery box.

[0020] In some embodiments, the battery box is provided with an insulating coating that covers the exposed holes, and adhesive is located between the battery body and the insulating coating.

[0021] Therefore, this insulating coating can compensate for the insulation effect of the missing insulating film in the exposed hole, reducing the possibility of insulation failure at that location.

[0022] In some embodiments, the insulating coating is a polyurea coating or a UV coating.

[0023] This improves the insulation effect without affecting the adhesive properties.

[0024] In some embodiments, the battery body further includes a side peripheral surface connected to the mounting surface. The side peripheral surface includes two opposing large surfaces and two opposing small surfaces, and the distance between the two small surfaces is greater than the distance between the two large surfaces. The distance between the exposed hole and the edge of the mounting surface is defined as L3, and the distance between the two large surfaces is defined as L4, satisfying the relationship: 3 mm ≤ L3 ≤ 0.25 L4.

[0025] And / or, the exposed hole is a square hole, a round hole, or an oval hole;

[0026] And / or, the insulating film also covers at least a portion of the other surfaces of the battery body, excluding the mounting surface, and the insulating film is provided with marking holes located on the other surfaces of the battery body.

[0027] Therefore, setting the distance L3 between the exposed hole and the edge of the mounting surface to be at least 3 mm and less than or equal to 0.25L4 ensures that the insulating film between the exposed hole and the edge of the mounting surface still has a certain size, facilitating accurate and stable bonding to the battery body. Simultaneously, it prevents the area of ​​the exposed hole from being too small, ensuring a suitable bonding area. Setting the exposed hole as a square allows for a relatively large area, increasing the bonding area between the battery body and the battery box and improving bonding stability. Setting the exposed hole as a circle or ellipse facilitates processing and simplifies the manufacturing process. The marking hole facilitates the positioning of the incoming insulating film, accurately determining the opening position of the exposed hole, and thus ensuring the accurate relative position of the exposed hole on the battery body.

[0028] In some embodiments, the insulating film is further provided with grooves, which are ring-shaped and corresponding to the explosion-proof valve.

[0029] Therefore, when the explosion-proof valve is venting and depressurizing, the gas can easily break through the insulating film located in the groove, thus improving the stability of the venting and depressurization.

[0030] This application also proposes an electrical device including a battery device as described in any of the above embodiments. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of one embodiment of the vehicle of this application;

[0033] Figure 2 This is a partial structural schematic diagram of an embodiment of the battery device of this application;

[0034] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0035] Figure 4 This is a partial structural schematic diagram of an embodiment of the battery device of this application;

[0036] Figure 5 This is a schematic diagram of the structure of a single battery cell according to an embodiment of this application;

[0037] Figure 6 for Figure 5 A schematic diagram of the exploded structure of a single battery cell;

[0038] Figure 7 This is a schematic diagram of the structure of an embodiment of the insulating film of this application.

[0039] Explanation of icon numbers:

[0040] 100. Battery assembly; 10. Battery box; 11. Clearance space; 13. Box body; 131. Support surface; 15. Support component; 30. Battery cell assembly; 31. Battery cell; 311. Battery body; 3111. Mounting surface; 3113. Terminal post; 3115. Explosion-proof valve; 313. Insulating film; 3131. Exposed hole; 3133. Marking hole; 3135. Score; 50. Adhesive; 1000. Vehicle; 200. Controller; 300. Motor.

[0041] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0044] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0046] Battery devices, which are devices used to store electrical energy, are widely used not only in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, electric cars, rail trains and other fields.

[0047] The battery device may include a battery case and individual battery cells housed within the battery case. The battery case encloses a space to house the individual battery cells, which are the smallest units comprising the battery and typically include a battery body and an insulating film covering the outside of the battery body. The battery body may include a battery casing and an electrode assembly housed within the battery casing. The electrode assembly is the component in the battery cell where the actual electrochemical reaction occurs, and may include a positive electrode, a negative electrode, and a separator located between them, formed by winding or stacking the positive electrode, negative electrode, and separator. The individual battery cells may be secondary or primary batteries; they may also be lithium-sulfur, sodium-ion, or magnesium-ion batteries, but are not limited to these. Furthermore, the individual battery cells may be flat, cuboid, or other shapes. In addition, the battery case may contain multiple individual battery cells, which may be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0048] Furthermore, in related technologies, some battery devices place explosion-proof valves at the bottom of individual battery cells to reduce thermal runaway. In this case, the battery box needs to provide ventilation for the explosion-proof valves at the bottom of the battery cells, thus affecting the bonding area between the bottom of the battery cells and the battery box. Simultaneously, the battery cells are primarily bonded to the battery box via an outer insulating film, and the bonding strength between the insulating film and the battery box is inherently low. Therefore, with the bonding area between the battery cells and the battery box affected and the bonding strength of the bonding interface low, the bonding strength of the battery cells within the battery box is easily reduced, making it difficult for the battery device to meet the bonding strength requirements for subsequent applications under vibration conditions.

[0049] Therefore, based on the above considerations, in order to solve the problem of low bonding strength of individual battery cells within the battery casing in current battery devices, this application proposes a novel battery device. This battery device innovatively features exposure holes in the insulating film to expose part of the mounting surface of the battery body, enabling direct bonding between the battery body and the battery casing, thereby improving bonding strength.

[0050] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices to provide power to them. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, ships, and spacecraft. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0051] For ease of explanation, the following embodiments will use a vehicle as an example of the electrical equipment in one embodiment of this application.

[0052] Please refer to Figure 1 The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0053] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0054] The structure of the battery device 100 proposed in this application will be explained below:

[0055] Please refer to the reference. Figures 2 to 6 In one embodiment of this application, the battery device 100 includes a battery box 10, a battery cell 31, and an adhesive 50. The battery cell 31 is disposed inside the battery box 10 and includes a battery body 311 and an insulating film 313. The battery body 311 has a mounting surface 3111 and an explosion-proof valve 3115. The battery box 10 has a clearance space 11 at the position corresponding to the explosion-proof valve 3115. The insulating film 313 at least partially covers the mounting surface 3111 and has an exposure hole 3131 that exposes the mounting surface 3111. The exposure hole 3131 is offset from the explosion-proof valve 3115. The adhesive 50 is disposed corresponding to the exposure hole 3131 and bonds the battery body 311 to the battery box 10.

[0056] The battery box 10 provides space for housing the battery cells 31, thus isolating and protecting them. The battery box 10 can be rectangular or cubic; this application does not limit its shape. Additionally, a clearance space 11 located inside the battery box 10 allows for clearance of the explosion-proof valve 3115 on the battery cell 31 and provides pressure relief space. The battery box 10 can be, as described below, a box body 13 and a support member 15 disposed on a support surface 131 within the box body 13. In this case, the box body 13 provides space for housing the battery cells 31, and the support member 15, together with the support surface 131 of the box body 13, forms the clearance space 11. However, this application is not limited to this; the battery box 10 may also exclude the support member 15. In this case, the clearance space 11 can be formed directly by recessing into the support surface 131. In addition, the clearance space 11 can be a groove, a hole, or a cavity. This application does not limit the structural type and shape of the clearance space 11.

[0057] The battery cell 31 can be used to store electrical energy. The battery cell 31 can be a rechargeable battery, meaning it can be recharged after discharge to reactivate the active materials and continue to be used. Further, the battery cell 31 can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. Additionally, the battery cell 31 can be flat, cuboid, or other shapes. Furthermore, the battery body 311 can include a battery casing and an electrode assembly disposed within the battery casing. A mounting surface 3111 can be disposed on the battery casing. The electrode assembly can include a positive electrode, a negative electrode, and a separator located between them, and is formed by winding or stacking the positive electrode, negative electrode, and separator. An explosion-proof valve 3115 can be embedded in the mounting surface 3111 to relieve pressure inside the battery body 311 in the event of thermal runaway. When the battery device 100 is in normal installation and use, the mounting surface 3111 can be downward-facing, forming the bottom surface of the battery body 311. Of course, in other embodiments, the mounting surface 3111 of the battery body 311 can also be oriented in other directions, as long as it can be used to connect with the battery box 10. Additionally, the battery body 311 can also be provided with terminals 3113 for electrically connecting the inner electrode assembly to the external circuit. The terminals 3113 can be located on the surface of the battery body 311 opposite to the mounting surface 3111, or they can be located on the surface of the battery body 311 connected to the mounting surface 3111. For example, the battery casing can include a casing body and two end caps. The casing body has openings at both ends and a mounting surface 3111. The two end caps respectively cover the openings at both ends of the casing body and are provided with terminals 3113. An insulating film 313 can be used to cover the outside of the battery casing within the battery body 311 to provide insulation. The insulating film 313 can be used to cover only the mounting surface 3111, or it can be further covered on other surfaces of the battery casing. For example, the insulating film 313 can be a ring-shaped envelope covering the battery casing, including the mounting surface 3111. An exposure hole 3131 exposes part of the mounting surface 3111 of the battery body 311, allowing the adhesive 50 to directly connect the battery body 311 to the battery case 10 through the exposure hole 3131. The number of exposure holes 3131 can be one, or two or more. The shape of the exposure hole 3131 can be circular, square, elliptical, triangular, or other shapes. Furthermore, the battery device 100 can include one battery cell 31, or two or more battery cells 31. When multiple battery cells 31 are included, they can be connected in series, in parallel, or a combination of series and parallel connections.

[0058] The adhesive 50 can be used to bond the portion of the battery body 311 exposed by the exposed hole 3131 to the battery case 10. The adhesive 50 can be epoxy resin structural adhesive or silicone, etc., as long as it can connect the battery body 311 and the battery case 10 after solidification. This application does not limit the type of adhesive.

[0059] Please refer to the reference. Figures 2 to 4 In one embodiment of this application, the battery box 10 includes a box body 13 and a support member 15. The box body 13 has a support surface 131. The support member 15 is disposed on the support surface 131, and the support member 15 and the support surface 131 are configured to form a clearance space 11. The battery cell 31 is disposed in the box body 13, and the exposure hole 3131 is provided corresponding to the support member 15. The adhesive 50 is used to bond the battery cell 311 and the support member 15.

[0060] The casing body 13 serves as the main structure of the battery box 10, providing space for accommodating the battery cells 31. The casing body 13 may comprise at least two parts that enclose and configure the space provided for accommodating the battery cells 31. For example, the casing body 13 may include a base and a cover. The base may be open at one end; the cover closes to the opening of the base. The cover may be a plate structure or also have an open end. A support member 15 is disposed on the support surface 131 to elevate the battery cells 31, thereby creating a clearance space 11 between the battery cells 31 and the mounting surface 3111. The support member 15 may be a column structure, a plate structure, or a block structure; this application does not limit the structural type or shape of the support member 15. Furthermore, the support member 15 and the casing body 13 may be an integral structure or separate components connected by welding or screws; this application does not limit the connection method between the support member 15 and the casing body 13.

[0061] In this embodiment, the battery box 10 is configured to include a box body 13 and a support member 15. The support member 15 protruding on the support surface 131 of the box body 13 and the support surface 131 are configured to form a clearance space 11. This allows the wall thickness of the box body 13 to be less than required, thereby improving the lightweight effect of the battery box 10 and reducing the manufacturing cost of the battery box 10.

[0062] Please refer to the reference. Figure 2 as well as Figures 4 to 6In one embodiment of this application, the insulating film 313 is provided with at least two exposure holes 3131, which are distributed on both sides of the explosion-proof valve 3115 in the first direction; the number of support members 15 is at least two, and the at least two support members 15 are arranged side by side at intervals along the first direction; two adjacent support members 15 and the support surface 131 are configured to form a clearance space 11, and are respectively arranged corresponding to the exposure holes 3131 on both sides of the battery cell 31 in the first direction.

[0063] The battery body 311 may also include a side peripheral surface connecting the mounting surface 3111. This side peripheral surface may include two opposing large surfaces and two opposing small surfaces, with the distance between the two small surfaces being greater than the distance between the two large surfaces. In this case, the arrangement direction of the two small surfaces can be a first direction, or it can be the length direction of the battery cell 31. At least one exposed hole 3131 is provided, meaning that the mounting surface 3111 of the battery body 311 has exposed holes 3131 at both ends in the length direction, and each end may have one exposed hole 3131, or it may have two or more exposed holes 3131. Two adjacent support members 15 are configured with the support surface 131 to form a clearance space 11, meaning that the battery cell 31 can be mounted on two adjacent support members 15. The mounting surfaces 3111 exposed by the exposed holes 3131 at both ends in the length direction are respectively bonded to the two adjacent support members 15 by adhesive 50.

[0064] In this embodiment, both ends of the battery cell 31 in the first direction are provided with exposure holes 3131, so that both ends of the battery cell 31 in the length direction can be bonded and fixed, thereby improving the bonding stability of the battery cell 31 in the battery box 10. At the same time, arranging the exposure holes 3131 at both ends of the battery cell 31 in the length direction can also be better offset from the explosion-proof valve 3115, improving the convenience of setting the exposure holes 3131.

[0065] Please refer to Figure 4 In one embodiment of this application, in the first direction, the length of the support member 15 is defined as L1, and the length of the exposed hole 3131 is defined as L2, satisfying the relationship: L1 > L2.

[0066] In this embodiment, the length L2 of the exposed hole 3131 in the first direction is set to be smaller than the length L1 of the support member 15 in the first direction. The portion of the insulating film 313 that surrounds the exposed hole 3131 can be abutted by the support member 15, reducing the possibility of the insulating film 313 warping at the exposed hole 3131.

[0067] Please refer to Figure 4 In one embodiment of this application, in the first direction, the exposure holes 3131 located on both sides of the explosion-proof valve 3115 are symmetrically arranged.

[0068] In this embodiment, the exposed holes 3131 at both ends of the battery cell 31 in the first direction are set to be symmetrical, that is, the shape and size are the same, so that the battery cell 31 is subjected to uniform adhesive force at both ends in the length direction, thereby improving the stability of the battery cell 31 in the battery box 10.

[0069] Please refer to Figure 4 In one embodiment of this application, the number of battery cells 31 is at least two, and the at least two battery cells 31 are arranged along a second direction to form a battery cell assembly 30, with the second direction intersecting the first direction; the support member 15 extends along the second direction, and two adjacent support members 15 are respectively arranged to correspond to the exposure holes 3131 on both sides of each battery cell 31 in the battery cell assembly 30 in the first direction.

[0070] The second direction can be the arrangement direction of the two large surfaces in the battery body 311 as described above, or it can be the width direction of the battery cell 31.

[0071] In this embodiment, since the two adjacent support members 15 are respectively provided with the exposed holes 3131 on both sides of each battery cell 31 in the battery cell assembly 30 in the first direction, each battery cell 31 in the battery cell assembly 30 can share the two adjacent support members 15 for installation, which helps to reduce the number of support members 15 and simplify the structural configuration of the battery box 10.

[0072] In one embodiment of this application, in order to improve the energy density of the battery device 100, the battery device 100 may include at least two battery cell assemblies 30, which may be arranged side by side along a first direction. In this case, the number of support members 15 may be at least four, and the at least four support members 15 may be arranged side by side at intervals along the first direction, with each battery cell assembly 30 mounted on two adjacent support members 15.

[0073] In one embodiment of this application, the battery box 10 is provided with an insulating coating that covers the exposed hole 3131, and the adhesive 50 is located between the battery body 311 and the insulating coating.

[0074] In this embodiment, an insulating coating is provided inside the battery box 10, corresponding to the exposed hole 3131. This insulating coating can compensate for the lack of insulation film 313 in the exposed hole 3131, reducing the possibility of insulation failure at that location. Simultaneously, since the connection strength between the insulating coating and the battery box 10, as well as between the insulating coating and the adhesive 50, is high, it will not affect the bonding strength between the battery body 311 and the battery box 10. Furthermore, when the battery box 10 includes a box body 13 and a support member 15 as described above, the insulating coating can be provided only on the support member 15, or it can be provided on both the box body 13 and the support member 15, adapting to the area of ​​the exposed hole 3131. Moreover, in some embodiments, when the area of ​​the exposed hole 3131 is large enough to exceed the support member 15, and the support member 15 itself is made of insulating material, the insulating coating can also be provided only on the box body 13.

[0075] In one embodiment of this application, the insulating coating is a polyurea coating or a UV coating.

[0076] In this embodiment, using a polyurea coating or a UV coating as the insulating coating is beneficial for improving the insulation effect and does not affect the adhesive performance of the adhesive 50. Of course, in other embodiments, the insulating coating may also be an epoxy resin coating or a polyimide coating, etc., and this application does not limit the material type of the insulating coating.

[0077] Please refer to Figure 4 In one embodiment of this application, the distance between the exposed hole 3131 and the edge of the mounting surface 3111 is defined as L3, and the distance between the two large surfaces in the battery body 311 is defined as L4, satisfying the relationship: 3 mm ≤ L3 ≤ 0.25 L4.

[0078] The arrangement direction of the two large surfaces, as described above, can be the width direction of the battery body 311. Therefore, 0.25L4 can also be said to be 0.25 of the width of the battery body 311.

[0079] In this embodiment, the distance L3 between the exposed hole 3131 and the edge of the mounting surface 3111 is set to be more than 3 mm and less than 0.25 of the width of the battery body 311. This ensures that the insulating film 313 between the exposed hole 3131 and the edge of the mounting surface 3111 still has a certain size, which facilitates accurate and stable bonding to the battery body 311. At the same time, it also ensures that the area of ​​the exposed hole 3131 is not too small, so as to have a suitable bonding area.

[0080] Please refer to the reference. Figures 4 to 6 In one embodiment of this application, the exposed hole 3131 is a square hole, a circular hole, or an elliptical hole.

[0081] In this embodiment, setting the exposed hole 3131 as a square allows it to have a relatively large area, increasing the bonding area between the battery body 311 and the battery case 10 and improving the stability of the bonding. Setting the exposed hole 3131 as a circle or ellipse facilitates its processing and simplifies the manufacturing process.

[0082] Please refer to the reference. Figures 5 to 7 In one embodiment of this application, the insulating film 313 also covers at least a portion of the other surfaces of the battery body 311 besides the mounting surface 3111, and the insulating film 313 is provided with marking holes 3133, which are located on the other surfaces of the battery body 311.

[0083] In this embodiment, the marking hole 3133 facilitates the positioning of the incoming insulating film 313, enabling accurate determination of the opening position of the exposed hole 3131, thus ensuring the accurate relative position of the exposed hole 3131 on the battery body 311. Specifically, CCD detection technology can be used to identify and detect the marking hole 3133 of the incoming insulating film 313 online. Then, using this as a reference, the opening position of the exposed hole 3131 is determined based on the relative positional relationship between the exposed hole 3131 and the marking hole 3133. The insulating film 313 can be annularly wrapped on the battery body 311, and the marking hole 3133 can be located on the surface of the battery body 311 opposite to the mounting surface 3111.

[0084] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the insulating film 313 is further provided with a notch 3135, which is ring-shaped and is provided corresponding to the explosion-proof valve 3115.

[0085] In this embodiment, by setting a notch 3135 at the position of the insulating film 313 corresponding to the explosion-proof valve 3115, the strength of the insulating film 313 at the notch 3135 is relatively low. Therefore, when the explosion-proof valve 3115 is venting and depressurizing, it is convenient for the gas to break through the insulating film 313 located in the notch 3135, thereby improving the stability of venting and depressurizing.

[0086] Please refer to the reference. Figures 2 to 7In one embodiment of this application, the battery device 100 includes a battery box 10, a battery cell 31, and an adhesive 50. The battery cell 31 is disposed inside the battery box 10 and includes a battery body 311 and an insulating film 313. The battery body 311 has a mounting surface 3111 and an explosion-proof valve 3115. The battery box 10 has a clearance space 11 at the position corresponding to the explosion-proof valve 3115. The insulating film 313 at least partially covers the mounting surface 3111 and has an exposure hole 3131 that exposes the mounting surface 3111. The exposure hole 3131 is offset from the explosion-proof valve 3115. The adhesive 50 is disposed corresponding to the exposure hole 3131 and bonds the battery body 311 to the battery box 10. The battery box 10 includes a box body 13 and a support member 15. The box body 13 has a support surface 131. The support member 15 is disposed on the support surface 131, and the support member 15 and the support surface 131 are configured to form a clearance space 11. The battery cell 31 is disposed in the box body 13, and the exposure hole 3131 is provided corresponding to the support member 15. The adhesive 50 is used to bond the battery body 311 and the support member 15. The insulating film 313 has at least two exposure holes 3131, which are distributed on both sides of the explosion-proof valve 3115 in the first direction. There are at least two support members 15, which are arranged side by side and spaced apart along the first direction. Two adjacent support members 15 are configured to form a clearance space 11 with the support surface 131, and are respectively provided to correspond to the exposure holes 3131 on both sides of the battery cell 31 in the first direction. In the first direction, the length of the support member 15 is defined as L1, and the length of the exposed hole 3131 is defined as L2, satisfying the relationship: L1 > L2. In the first direction, the exposed holes 3131 on both sides of the explosion-proof valve 3115 are symmetrically arranged. There are at least two battery cells 31, arranged along a second direction to form a battery cell assembly 30, with the second direction intersecting the first direction. The support member 15 extends along the second direction, and two adjacent support members 15 correspond to the exposed holes 3131 on both sides of each battery cell 31 in the battery cell assembly 30 in the first direction. An insulating coating is provided inside the battery box 10, covering the exposed holes 3131, and adhesive 50 is located between the battery body 311 and the insulating coating. The insulating coating is a polyurea coating or a UV coating.The battery body 311 also includes a side peripheral surface connected to the mounting surface 3111. The side peripheral surface includes two opposing large surfaces and two opposing small surfaces, with the distance between the two small surfaces being greater than the distance between the two large surfaces. The distance between the exposed hole 3131 and the edge of the mounting surface 3111 is defined as L3, and the distance between the two large surfaces is defined as L4, satisfying the relationship: 3 mm ≤ L3 ≤ 0.25L4. The exposed hole 3131 can be a square hole, a circular hole, or an elliptical hole. The insulating film 313 also covers at least a portion of the other surfaces of the battery body 311 besides the mounting surface 3111. The insulating film 313 has a marking hole 3133, which is located on the other surfaces of the battery body 311. The insulating film 313 also has a groove 3135, which is ring-shaped and corresponds to the explosion-proof valve 3115.

[0087] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized by, The battery device comprises: a battery box; a battery cell arranged in the battery box, the battery cell comprising a battery body and an insulation film, the battery body having a mounting surface provided with a relief valve, the battery box being provided with a relief space at a position corresponding to the relief valve; the insulation film being at least partially wrapped around the mounting surface, the insulation film being provided with a display hole for exposing the mounting surface, the display hole being arranged in a staggered manner with the relief valve; and an adhesive arranged corresponding to the display hole and bonding the battery body and the battery box; the battery box comprising a box body and a support, the box body having a support surface; the support being arranged on the support surface, the support and the support surface being arranged in a surrounding manner to form the relief space; the battery cell being arranged in the box body, the display hole being arranged corresponding to the support, and the adhesive bonding the battery body and the support.

2. The battery device of claim 1, wherein The insulation film is provided with at least two display holes, and the at least two display holes are distributed on both sides of the relief valve in a first direction; the number of the supports is at least two, and the at least two supports are arranged in a side-by-side manner along the first direction; two adjacent supports and the support surface are arranged in a surrounding manner to form the relief space, and the two adjacent supports are respectively arranged corresponding to the display holes on both sides of the battery cell in the first direction.

3. The battery device of claim 2, wherein In the first direction, the size of the support is defined as L1, and the size of the display hole is defined as L2, and the relationship L1>L2 is satisfied; and / or, in the first direction, the display holes on both sides of the relief valve are arranged in a symmetrical manner.

4. The battery device of claim 2, wherein The number of the battery cells is at least two, and the at least two battery cells are arranged in a second direction to form a battery cell assembly, and the second direction intersects the first direction; the support is arranged along the second direction, and two adjacent supports are respectively arranged corresponding to the display holes on both sides of each battery cell in the battery cell assembly in the first direction.

5. The battery device according to any one of claims 1 to 4, wherein The battery box is provided with an insulation coating, the insulation coating covers the display hole, and the adhesive is located between the battery body and the insulation coating.

6. The battery device of claim 5, wherein The insulation coating is a polyurea coating or a UV coating.

7. The battery device according to any one of claims 1 to 4, wherein The battery body further comprises a side peripheral surface connected to the mounting surface, the side peripheral surface comprises two opposite large surfaces and two opposite small surfaces, the distance between the two small surfaces is greater than the distance between the two large surfaces; the distance between the display hole and the edge of the mounting surface is defined as L3, and the distance between the two large surfaces is defined as L4, and the relationship 3mm≤L3≤0.25L4 is satisfied; and / or, the display hole is a square hole, a circular hole or an oval hole; and / or, the insulation film further wraps at least part of the other surfaces of the battery body except the mounting surface, and the insulation film is provided with an identification hole located on the other surfaces of the battery body.

8. The battery device according to any one of claims 1 to 4, wherein The insulation film is further provided with a notch, the notch is in a ring shape and is arranged corresponding to the relief valve.

9. An electric device, characterized by The battery device comprises any one of claims 1 to 8.

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