Battery and battery pack

Abstract

The battery comprises a shell and an insulating film, the shell is provided with a first outer surface and a second outer surface, one end of the first outer surface is connected with one end of the second outer surface, the first outer surface and the second outer surface are arranged in an included angle mode, the insulating film is wrapped outside the shell, and the insulating film is arranged between the first outer surface and the second outer surface. The insulating film is provided with a first opening and a second opening which are communicated with each other, the first opening corresponds to the first outer surface and is used for exposing at least part of the first outer surface, and the second opening corresponds to the second outer surface and is used for exposing at least part of the second outer surface; the exposed part of the first outer surface and the exposed part of the second outer surface are used for being fixedly bonded with the inner surface of the battery box body, so that the shell is fixedly bonded with the battery box body in two directions, the firm connection between the battery and the battery box body is realized, and the whole battery box can bear larger mechanical impact.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and a battery pack. Background Art

[0002] Since the outer shell of the battery is made of aluminum, an insulating film is often coated on the outside of the battery for insulation treatment. Then, the battery wrapped with the insulating film is adhesively fixed to the inner wall surface of the battery box. However, due to the poor adhesiveness of the outer surface of the insulating film, the adhesion between the battery wrapped with the insulating film and the structural adhesive is not firm. Summary of the Utility Model

[0003] An embodiment of the utility model provides a battery and a battery pack, which can solve the technical problem that the adhesion between the battery wrapped with the insulating film and the structural adhesive is not firm due to the poor adhesiveness of the outer surface of the insulating film.

[0004] In a first aspect, an embodiment of the utility model provides a battery.

[0005] In one embodiment, the battery includes:

[0006] A housing having a first outer surface and a second outer surface, one end of the first outer surface and the second outer surface being connected, and the first outer surface and the second outer surface being arranged at an angle;

[0007] An insulating film coated on the outside of the housing, the insulating film having a first opening and a second opening communicating with each other, the first opening corresponding to the first outer surface for at least part of the first outer surface to be exposed, and the second opening corresponding to the second outer surface for at least part of the second outer surface to be exposed, wherein the exposed part of the first outer surface and the exposed part of the second outer surface are used for adhesively fixing to the inner surface of the battery box.

[0008] In one embodiment, the first outer surface is provided at the bottom of the housing, and the second outer surface is provided at the side of the housing.

[0009] In one embodiment, along the up-down direction, the second opening penetrates through the second outer surface.

[0010] In one embodiment, the first outer surface is entirely exposed.

[0011] In one embodiment, the second outer surface includes a plurality of side surfaces sequentially connected end to end along the circumference of the first opening, and each side surface is connected to the first outer surface;

[0012] A plurality of second openings are provided, and the plurality of second openings are arranged in one-to-one correspondence with the plurality of side surfaces.

[0013] In one embodiment, along the circumferential direction of the first opening, two adjacent second openings are communicated with each other.

[0014] In one embodiment, along the vertical direction, the width of the second opening is L1, where 0 mm < L1 ≤ 30 mm.

[0015] In one embodiment, the area of the second outer surface is A1, and the area of the second opening corresponding to the second outer surface is a1, where 0% < a1 / A1 ≤ 100%.

[0016] In one embodiment, both the first outer surface and the second outer surface are provided on the side portion of the housing.

[0017] In one embodiment, at least two first outer surfaces are provided, and each first outer surface is provided with the first opening; and / or,

[0018] At least two second outer surfaces are provided, and each second outer surface is provided with the second opening.

[0019] In one embodiment, the area of the first outer surface is A2, and the area of the first opening corresponding to the first outer surface is a2, where 0% < a2 / A2 ≤ 50%; and / or,

[0020] The area of the second outer surface is A3, and the area of the second opening corresponding to the second outer surface is a3, where 0% < a3 / A3 ≤ 50%.

[0021] In one embodiment, at least two first outer surfaces are provided, and each first outer surface is provided with the first opening, at least two second outer surfaces are provided, and each second outer surface is provided with the second opening, and at least two first outer surfaces and at least two second outer surfaces are alternately arranged along the circumferential direction of the housing.

[0022] In a second aspect, an embodiment of the present invention provides a battery pack.

[0023] In one embodiment, the battery pack includes the battery as described above, and the battery includes:

[0024] A housing having a first outer surface and a second outer surface, one end of the first outer surface and the second outer surface being connected, and the first outer surface and the second outer surface being arranged at an included angle.

[0025] An insulating film is coated on the outside of the housing. The insulating film has a first opening and a second opening that communicate with each other. The first opening is arranged corresponding to the first outer surface to expose at least part of the first outer surface. The second opening is arranged corresponding to the second outer surface to expose at least part of the second outer surface. Wherein, the exposed parts of the first outer surface and the second outer surface are used for adhesively fixing to the inner surface of the battery box body.

[0026] In one embodiment, the battery pack further includes:

[0027] A battery box body, and the battery is installed in the battery box body;

[0028] A structural adhesive is provided in the battery box body to adhesively fix the exposed parts of the first outer surface and the second outer surface to the inner surface of the battery box body.

[0029] Advantageous effects of the embodiments of the present utility model:

[0030] In the embodiments of the present utility model, the housing plays a role in protecting the internal structure of the battery, which can block the intrusion of external substances and moisture, and avoid problems such as chemical reactions or short circuits inside the battery. The use of the insulating film not only provides the function of electrical insulation, but also enhances the sealing between the battery and the battery box body, preventing direct contact between the battery and the external environment, thereby reducing the risk of battery damage. The design of the insulating film effectively wraps the outside of the battery housing, preventing possible micro-short circuit problems on the housing surface, and improving the safety and stability of the battery. The housing is adhesively fixed to the battery box body through two directions (i.e., the first outer surface and the second outer surface), increasing the number of connection points between the battery and the battery box body, thereby dispersing the connection force and avoiding connection failure caused by excessive single-point force. This multi-point fixing method enables the battery to more effectively resist the action of external forces such as vibration and impact when subjected to external forces, maintain the stability of the connection, reduce the movement and vibration of the battery during transportation and use, further improve the safety of the battery, and enable the overall battery box to withstand greater mechanical impact. Secondly, since the first outer surface and the second outer surface are arranged at an angle, and the exposed parts of the first outer surface and the second outer surface are both adhesively fixed to the inner surface of the battery box body, this non-parallel connection method makes the positioning of the battery in the battery box body more accurate and the connection more stable. In addition, when the insulating film is provided with a first opening and a second opening that communicate with each other, the heat dissipation effect of the battery can be improved. In addition, the amount of the insulating film can be reduced, the production cost can be lowered, and the difficulty of annular wrapping of the insulating film can be reduced, improving the production efficiency. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0032] Figure 1 is a three-dimensional schematic diagram of a battery provided by the first embodiment of the present utility model;

[0033] Figure 2 is Figure 1 the front view of the battery shown;

[0034] Figure 3 is a structural schematic diagram of an insulating film provided by an embodiment of the present utility model;

[0035] Figure 4 is a structural schematic diagram of a battery (partial structure) provided by the second embodiment of the present utility model;

[0036] Figure 5 is Figure 4 the partial enlarged schematic diagram at position A shown;

[0037] Figure 6 is a structural schematic diagram of an insulating film provided by another embodiment of the present utility model.

[0038] Explanation of the reference numerals in the drawings:

[0039] 10. Battery;

[0040] 11. Housing, 111. First outer surface, 112. Second outer surface, 1121. Side surface;

[0041] 12. Insulating film, 121. First opening, 122. Second opening. Detailed implementation manners

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0043] Since the outer shell of the battery is made of aluminum, an insulating film is often coated on the outside of the battery for insulation treatment. Then, the battery wrapped with the insulating film is adhesively fixed to the inner wall surface of the battery box. However, due to the poor adhesiveness of the outer surface of the insulating film, the adhesion between the battery wrapped with the insulating film and the structural adhesive is not firm.

[0044] In view of this, the present utility model proposes a battery. The battery provided by the present utility model can improve the bonding performance of the connection between the housing wrapped with the insulating film and the battery box body, so that the overall battery box can withstand greater mechanical impacts. The battery will be described in detail below in conjunction with the main drawings.

[0045] Please refer to Figure 1 、 Figure 4 and Figure 6 , Figure 1 is a three-dimensional schematic diagram of the battery provided by the first embodiment of the present utility model, Figure 4 is a structural schematic diagram of the battery (partial structure) provided by the second embodiment of the present utility model, Figure 6 is a structural schematic diagram of the insulating film provided by another embodiment of the present utility model. The battery 10 includes a housing 11 and an insulating film 12. The housing 11 has a first outer surface 111 and a second outer surface 112. One end of the first outer surface 111 and the second outer surface 112 are connected, and the first outer surface 111 and the second outer surface 112 are arranged at an angle. The insulating film 12 is coated on the outside of the housing 11. The insulating film 12 has a first opening 121 and a second opening 122 that communicate with each other. The first opening 121 is arranged corresponding to the first outer surface 111 to expose at least part of the first outer surface 111, and the second opening 122 is arranged corresponding to the second outer surface 112 to expose at least part of the second outer surface 112. Among them, the exposed parts of the first outer surface 111 and the exposed parts of the second outer surface 112 are used for adhesively fixing to the inner surface of the battery box body.

[0046] In the embodiment of the utility model, the shell 11 plays a role in protecting the internal structure of the battery 10, which can block the intrusion of foreign substances and moisture, and avoid problems such as chemical reactions or short circuits inside the battery 10. The use of the insulating film 12 not only provides the function of electrical insulation, but also enhances the sealing between the battery 10 and the battery case, prevents the direct contact between the battery 10 and the external environment, thereby reducing the risk of damage to the battery 10. The design of the insulating film 12 effectively wraps the outside of the battery 10 shell 11, prevents the micro-short circuit problem that may be caused by the surface of the shell 11, and improves the safety and stability of the battery 10. The shell 11 is bonded and fixed to the battery case in two directions (i.e., the first outer surface 111 and the second outer surface 112), so that the number of connection points between the battery 10 and the battery case is increased, thereby dispersing the connection force and avoiding connection failure caused by excessive force at a single point. This multi-point fixing method enables the battery 10 to more effectively resist the effects of external forces such as vibration and impact, maintain the stability of the connection, reduce the movement and vibration of the battery 10 during transportation and use, further improve the safety of the battery 10, and enable the battery case as a whole to withstand greater mechanical impact. Secondly, since the first outer surface 111 and the second outer surface 112 are arranged at an angle, and the leaking part of the first outer surface 111 and the leaking part of the second outer surface 112 are both bonded and fixed to the inner surface of the battery case, this non-parallel connection method makes the positioning of the battery 10 in the battery case more accurate and the connection is stable. In addition, when the first opening and the second opening that are connected are opened on the insulating film, the heat dissipation effect of the battery can be improved. In addition, the amount of insulating film used can be reduced, the production cost can be reduced, and the difficulty of annular wrapping of the insulating film can be reduced, thereby improving production efficiency.

[0047] Reference Figure 3 , Figure 4 as well as Figure 5 , Figure 3 is a schematic structural diagram of an insulating film provided by an embodiment of the utility model, Figure 5 yes Figure 4 A is a partial enlarged schematic diagram shown. In one embodiment, the first outer surface 111 is provided at the bottom of the shell 11, and the second outer surface 112 is provided at the side of the shell 11, so that the bottom leaking part and the side leaking part of the shell 11 can be bonded to the inner surface of the battery case, and the battery 10 can be fixed in two directions. This design significantly enhances the connection stability between the battery 10 and the battery case, and reduces the displacement and shaking of the battery 10 under external forces such as vibration and impact. Through bonding and fixation in two directions, the battery 10 and the battery case form a more stable overall structure. This structure can better resist deformation and damage when subjected to external forces, thereby improving the structural strength of the entire battery system.

[0048] Continue to refer toFigure 3 In one embodiment, along the up-down direction, the second opening 122 penetrates through the second outer surface 112. Thus, it means that more areas of the second outer surface 112 are exposed, and these areas can all be covered with structural adhesive and form an adhesion with the inner surface of the battery box body. Compared with the design that does not penetrate the second outer surface 112, the penetrating second opening 122 greatly increases the adhesion area between the housing 11 and the battery box body. A larger adhesion area means that the structural adhesive can be more evenly distributed between the battery 10 and the battery box body, reducing the stress concentration phenomenon caused by uneven adhesion. The adhesion strength is proportional to the adhesion area. Since the design of the penetrating second opening 122 increases the adhesion area, the adhesion strength between the battery 10 and the battery box body is accordingly improved, making the battery 10 less likely to fall off or displace when subjected to external forces such as vibration and impact, thereby improving the safety of the battery 10.

[0049] Refer to Figures 3 to 5 In one embodiment, the first outer surface 111 is entirely exposed. Thus, structural adhesive can be applied to the entire bottom of the housing 11, greatly increasing the adhesion area between the bottom of the housing 11 and the battery box body, thereby significantly improving the stability of the battery 10 fixation. This comprehensive adhesion method makes the battery 10 less likely to displace or shake, improving the overall stability of the battery 10. Since the structural adhesive has an insulating property, by applying the structural adhesive comprehensively on the bottom, the risk of battery 10 leakage can be avoided. In addition, the structural adhesive also has a certain elasticity, and the bottom of the housing 11 adhering to the inner surface of the battery box body through the structural adhesive also enhances the impact resistance of the battery 10. Applying the structural adhesive comprehensively on the bottom can also ensure more uniform heat conduction between the battery 10 and the battery box body, which is beneficial to heat dissipation. The adhesion method of applying the structural adhesive comprehensively on the bottom makes the installation process of the battery 10 simpler. The staff only needs to place the battery 10 at the predetermined position of the battery box body and then wait for the structural adhesive to cure. This installation method does not require additional fixing parts or tools, reducing the installation cost and time.

[0050] Specifically, along the up-down direction, the second opening 122 penetrates through the second outer surface 112, and the first outer surface 111 is entirely exposed. Thus, while improving the adhesion strength between the battery 10 and the battery box body, the insulating film can be saved, the production cost is reduced, and a one-time wrapping can be adopted, with simple operation and improved production efficiency.

[0051] Refer to Figure 4 and Figure 5, in one embodiment, the second outer surface 112 includes a plurality of side surfaces 1121 that are sequentially connected end to end along the circumference of the first opening 121. Each side surface 1121 is connected to the first outer surface 111. A plurality of second openings 122 are provided, and the plurality of second openings 122 are arranged in one-to-one correspondence with the plurality of side surfaces 1121. Thus, it means that a part of each side surface 1121 that leaks outside the second opening 122 can be used as an adhesive surface, and the battery box is bonded by applying structural adhesive to this adhesive surface. As a result, the overall adhesive area is greatly increased. A larger adhesive area means that the structural adhesive can be bonded and fixed to more inner surfaces of the battery box, enabling the battery 10 to better resist the impact and vibration of external forces and improving the stability of the connection between the battery 10 and the battery box. In addition, each side surface 1121 can withstand the dispersive action of external forces, thereby reducing the risk of connection failure caused by stress concentration.

[0052] Continue to refer to Figure 4 and Figure 5 , in one embodiment, along the circumference of the first opening 121, two adjacent second openings 122 are connected to each other. Thus, when two adjacent second openings 122 are connected to each other along the circumference of the first opening 121, a continuous and circumferential adhesive area is actually formed. This design enables the originally dispersed side surfaces 1121 to form an integral adhesive surface, thereby greatly increasing the adhesive area between the housing 11 and the battery box. A larger adhesive area means that the structural adhesive can form close contact and connection with more surfaces, which helps to enhance the firmness and stability of the adhesion. The continuous and circumferential adhesive area enables the structural adhesive to be more evenly distributed between the housing 11 and the battery box, forming a more stable and uniform adhesive layer. This uniform adhesive layer can better resist the impact and vibration of external forces and improve the stability of the connection. The design of connecting two adjacent second openings 122 forms a closed loop in terms of structure. This closed-loop structure can better withstand forces from all directions and evenly disperse these forces to the entire adhesive area. When the battery 10 is subjected to external impact or vibration, the closed-loop structure can ensure that each side surface 1121 receives uniform acting forces, thereby reducing the risk of connection failure caused by stress concentration. In addition, since the adhesive area is continuous, the force will also be more stable and continuous during the transmission process, which helps to reduce damage or failure caused by sudden changes in force.

[0053] Refer to Figure 5, in one embodiment, along the vertical direction, the width of the second opening 122 is L1, where 0 mm < L1 ≤ 30 mm. Thus, setting the width L1 of the second opening 122 within the range of 0 mm < L1 ≤ 30 mm ensures that the opening is neither too wide nor too narrow. An overly wide opening may affect the insulation and sealing performance of the battery 10, while an overly narrow opening may limit the bonding strength. Within this width range, the structural adhesive can more effectively fill and penetrate into the second opening 122, forming a tighter and more uniform bonding layer between the battery 10 and the battery box. An appropriate opening width helps the uniform distribution and flow of the structural adhesive, avoiding problems such as uneven bonding or structural adhesive accumulation caused by an overly narrow opening.

[0054] In one embodiment, the area of the second outer surface 112 is A1, and the area of the second opening 122 corresponding to the second outer surface 112 is a1, where 0% < a1 / A1 ≤ 100%. Thus, by setting the ratio range of a1 to A1, the area ratio of the second opening 122 occupying the second outer surface 112 can be precisely controlled. This helps to more accurately predict and control the bonding performance during the design and manufacturing process, thereby ensuring the bonding performance between the housing 11 and the battery box. When the ratio of a1 / A1 is within an appropriate range, it can ensure that the structural adhesive can fully penetrate into the area of the second opening 122 and form a tight bond between the housing 11 and the battery box. This helps to improve the bonding strength and stability, reducing the risk of failure caused by poor bonding. An appropriate a1 / A1 ratio can ensure that when stressed, the force can be evenly distributed over the entire second outer surface 112, rather than being concentrated in a certain local area. This helps to reduce local stress concentration and improve the stress-bearing performance and stability of the entire battery box.

[0055] Referring to Figure 1 , Figure 2 and Figure 6 , Figure 2 is Figure 1 the front view of the battery shown. In one embodiment, both the first outer surface 111 and the second outer surface 112 are provided on the side of the housing 11. When bonding, the housing 11 is actually reinforced from two different directions. This design increases the area where the structural adhesive is applied, making the bond between the bonded housing 11 and the inner wall surface of the battery box firm. When bonding from two directions, the force distribution on the housing 11 will be more uniform. This uniform force distribution can effectively prevent stress concentration and reduce the risk of bonding failure caused by excessive local stress. Since bonding is carried out from two different directions, even if there are slight problems with the bonding in one direction, the bonding in the other direction can still maintain a high level of reliability.

[0056] Continuing to refer to Figure 1 , Figure 2 andFigure 6 , in one embodiment, at least two first outer surfaces 111 are provided, and each first outer surface 111 is provided with a first opening 121. Thus, by providing at least two first outer surfaces 111, and each first outer surface 111 is provided with a first opening 121, this means that the contact area with the structural adhesive is significantly increased. The increased bonding area means more bonding points, thereby strengthening the bonding effect between the housing 11 and the inner surface of the battery box. Due to the increase in the bonding area, the bonding strength will also increase accordingly. This enables the connection between the housing 11 and the inner surface of the battery box to more effectively resist external tensile forces or impact forces. By providing at least two first outer surfaces 111 and respectively providing first openings 121, a more uniform force distribution can be achieved. The uniform force distribution helps to reduce stress concentration and local deformation, thereby improving the stability and durability of the connection between the housing 11 and the inner surface of the battery box.

[0057] In one embodiment, at least two second outer surfaces 112 are provided, and each second outer surface 112 is provided with a second opening 122. Thus, by providing at least two second outer surfaces 112, and each second outer surface 112 is provided with a second opening 122, this means that the contact area with the structural adhesive is significantly increased. The increased bonding area means more bonding points, thereby strengthening the bonding effect between the housing 11 and the inner surface of the battery box. Due to the increase in the bonding area, the bonding strength will also increase accordingly. This enables the connection between the housing 11 and the inner surface of the battery box to more effectively resist external tensile forces or impact forces. By providing at least two second outer surfaces 112 and respectively providing second openings 122, a more uniform force distribution can be achieved. The uniform force distribution helps to reduce stress concentration and local deformation, thereby improving the stability and durability of the connection between the housing 11 and the inner surface of the battery box.

[0058] In one embodiment, the area of the first outer surface 111 is A2, and the area of the first opening 121 corresponding to the first outer surface 111 is a2, where 0% < a2 / A2 ≤ 50%. Thus, the ratio (a2 / A2) of the area of the first opening 121 to the area of the entire first outer surface 111 is between 0% and 50%, which means that the size of the opening is appropriate, which can not only ensure sufficient bonding area but also enable the structural adhesive to fully penetrate, improving the bonding strength. The appropriate design of the first opening 121 can reduce stress concentration because the first opening 121 can serve as a stress release point, enabling the structure to more evenly disperse stress when subjected to external forces.

[0059] In one embodiment, the area of the second outer surface 112 is A3, and the area of the second opening 122 corresponding to the second outer surface 112 is a3, where 0% < a3 / A3 ≤ 50%. In this way, the ratio (a2 / A2) of the area of the second opening 122 to the area of the entire second outer surface 112 is between 0% and 50%, which means that the size of the opening is moderate, ensuring both sufficient bonding area and sufficient penetration of the structural adhesive to improve the bonding strength. The appropriate design of the second opening 122 can reduce stress concentration because the second opening 122 can serve as a stress release point, enabling the structure to disperse stress more evenly when subjected to external forces.

[0060] In one embodiment, at least two first outer surfaces 111 are provided, and each first outer surface 111 is provided with a first opening 121. At least two second outer surfaces 112 are provided, and each second outer surface 112 is provided with a second opening 122. The at least two first outer surfaces 111 and the at least two second outer surfaces 112 are alternately arranged along the circumferential direction of the housing 11. In this way, by providing at least two first outer surfaces 111 and second outer surfaces 112 and arranging openings on each surface, the bonding area in contact with the structural adhesive is greatly increased. Increasing the bonding area can improve the stability and strength of the connection between the housing 11 and the inner surface of the battery box. The alternately arranged first outer surfaces 111 and second outer surfaces 112 can ensure good contact of the structural adhesive in different directions. In addition, the first outer surfaces 111 and second outer surfaces 112 alternately arranged along the circumferential direction of the housing 11 can make the force more uniform. When the battery 10 is subjected to external forces or impacts, this design can disperse the force to multiple surfaces, reduce stress concentration, and lower the risk of cracking or damage.

[0061] An embodiment of the present utility model also provides a battery pack. The battery pack includes the battery 10 as described above. For the specific structure of the battery 10, reference can be made to the above embodiments. Since this battery pack adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0062] In one embodiment, the battery pack includes a battery box and a structural adhesive. The battery is installed in the battery box, and the structural adhesive is provided in the battery box to bond and fix the exposed parts of the first outer surface 111 and the second outer surface 112 to the inner surface of the battery box. In this way, the structural adhesive can effectively reduce the relative movement of the battery in the battery pack, helping to protect the battery cells from physical damage. Using the structural adhesive can simplify the assembly process of the battery pack, reduce the need for traditional mechanical fasteners (such as screws, buckles, etc.), and make the assembly faster and less costly. In extreme cases such as collisions, the structural adhesive can act as an energy-absorbing material to reduce the impact force on the battery and lower the probability of damage to the battery pack.

[0063] It should be noted that in the design of the battery pack, structural adhesive is a key material, which is used to fix the battery (cell) to the battery box. This kind of glue usually has the characteristics of high strength, high temperature resistance, good thermal conductivity, insulation and chemical corrosion resistance. The selection and application of the structural adhesive are crucial for the safety and performance of the battery pack. The material of the structural adhesive can be one-component polyurethane or two-component polyurethane. For the structural adhesive made of one-component polyurethane, its bonding strength can be achieved by means of moisture curing or heat curing, etc. For the structural adhesive made of two-component polyurethane, its bonding strength can be achieved by chemical bonds and intermolecular forces.

[0064] In addition, in other embodiments, the structural adhesive can also include epoxy resin glue, acrylate structural adhesive, UV glue or high-temperature hot melt glue, etc. Specifically, the selection of the type of the structural adhesive can be made according to needs, and the present application does not limit this.

[0065] The above has introduced the embodiments of the present utility model in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A battery, characterized in that: Comprising: A housing having a first outer surface and a second outer surface, one end of the first outer surface and the second outer surface being connected, and the first outer surface and the second outer surface being disposed at an angle; An insulating film covering the outside of the housing, the insulating film having a first opening and a second opening communicating with each other, the first opening corresponding to the first outer surface for allowing at least a part of the first outer surface to be exposed, and the second opening corresponding to the second outer surface for allowing at least a part of the second outer surface to be exposed, wherein the exposed parts of the first outer surface and the second outer surface are used for adhesively fixing to the inner surface of the battery box.

2. The battery according to claim 1, characterized in that The first outer surface is disposed at the bottom of the housing, and the second outer surface is disposed at the side of the housing.

3. The battery according to claim 2, characterized in that In the up and down direction, the second opening penetrates through the second outer surface.

4. The battery according to claim 2, characterized in that The first outer surface is entirely exposed.

5. The battery according to claim 4, characterized in that The second outer surface includes a plurality of side surfaces sequentially connected end to end along the circumference of the first opening, and each side surface is connected to the first outer surface; A plurality of second openings are provided, and the plurality of second openings are provided in one-to-one correspondence with the plurality of side surfaces.

6. The battery according to claim 5, characterized in that Adjacent two of the second openings communicate with each other along the circumference of the first opening.

7. The battery according to claim 6, characterized in that In the up and down direction, the width of the second opening is L1, where 0mm < L1 ≤ 30mm.

8. The battery according to any one of claims 2 to 7, characterized in that: The area of the second outer surface is A1, and the area of the second opening corresponding to the second outer surface is a1, where 0% < a1 / A1 ≤ 100%.

9. The battery according to claim 1, characterized in that Both the first outer surface and the second outer surface are disposed at the side of the housing.

10. The battery according to claim 9, characterized in that At least two first outer surfaces are provided, and each first outer surface is provided with the first opening; and / or, At least two second outer surfaces are provided, and each second outer surface is provided with the second opening.

11. The battery according to claim 9 or 10, characterized in that: The area of the first outer surface is A2, and the area of the first opening corresponding to the first outer surface is a2, where 0% < a2 / A2 ≤ 50%; and / or, The area of the second outer surface is A3, and the area of the second opening corresponding to the second outer surface is a3, where 0% < a3 / A3 ≤ 50%.

12. The battery according to claim 9, characterized in that At least two first outer surfaces are provided, and each first outer surface is provided with the first opening, at least two second outer surfaces are provided, and each second outer surface is provided with the second opening, and the at least two first outer surfaces and the at least two second outer surfaces are alternately arranged along the circumference of the housing.

13. A battery pack, characterized in that: Including the battery according to any one of claims 1 to 12.

14. The battery pack according to claim 13, characterized in that: Further comprising: A battery box, the battery being installed in the battery box; A structural adhesive disposed in the battery box for adhesively fixing the exposed parts of the first outer surface and the second outer surface to the inner surface of the battery box.

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