Battery protection shell and battery assembly

Abstract

The utility model relates to a battery protection shell and a battery assembly, the battery protection shell is used for wrapping at least part of the surface of a battery, the battery protection shell comprises a shell and metal pieces, the shell is cylindrical, the shell comprises a plurality of side walls which are sequentially connected end to end, and the metal pieces are arranged on the inner sides and / or the outer sides of the side walls. According to the battery protection shell, the battery protection shell is composed of the shell body and the metal piece, the shell body comprises the multiple side walls which are sequentially connected end to end, so that the appearance structure of the battery is formed, and the metal piece is arranged on the side face of the side wall, so that the structural strength of the battery protection shell is enhanced, and the battery protection shell can change along with deformation of the battery; therefore, the battery can be continuously wrapped, so that the safety and the stability of the battery are protected.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery protective shell and a battery assembly. Background Art

[0002] New energy batteries refer to batteries produced using new energy technologies and are able to provide a power source. New energy batteries have the characteristics of low pollution, long life and high density, and are therefore widely used in various fields such as electric vehicles and energy storage systems. Utility Model Content

[0003] In order to solve the problems existing in the related art, according to a first aspect of the present disclosure, a battery protection shell is provided, which is used to wrap at least a part of the surface of a battery, and the battery protection shell includes:

[0004] The shell is cylindrical and includes a plurality of side walls connected end to end in sequence;

[0005] The metal part is arranged on the inner side and / or the outer side of the side wall.

[0006] In some embodiments, the metal piece is in a plate or mesh shape.

[0007] In some embodiments, the metal piece is made of shape memory metal, and has a first shape when at a first preset temperature, and the inner side of the metal piece having the first shape is in contact with the surface of the battery.

[0008] In some embodiments, in the length and width directions of the shell, each side wall is provided with a plurality of the metal parts, and the plurality of the metal parts are arranged at intervals along the extension direction of the side wall.

[0009] In some embodiments, the metal member includes two metal plates parallel to each other, and a connecting plate for connecting the two metal plates;

[0010] The two metal plates are parallel to each other, and a distance between the two metal plates is less than or equal to a thickness of the side wall.

[0011] In some embodiments, the metal member is connected to the side wall by bonding, clamping or riveting.

[0012] In some embodiments, the housing further comprises a chamfered structure, and the chamfered structure is used to connect the two connected side walls;

[0013] Wherein, the chamfered structure and the two adjacent side walls are an integral structure.

[0014] In some embodiments, in the length and / or width direction of the shell, the chamfered structure protrudes outward from the outer side of the side wall.

[0015] In some embodiments, in an assembled state, there is a gap between the inner side of the chamfered structure and the outer surface of the battery.

[0016] According to a second aspect of the present disclosure, a battery assembly and a battery protective shell as described in the first aspect are provided.

[0017] The beneficial effects of the present disclosure are: the battery protective shell is composed of a shell and a metal part, wherein the shell includes a plurality of side walls connected end to end in sequence to form the outer structure of the battery, and the metal part is arranged on the side of the side wall to enhance the structural strength of the battery protective shell, and the battery protective shell can change as the battery is deformed, so as to continue to wrap the battery, thereby protecting the safety and stability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 is a schematic diagram of a battery assembly provided by an embodiment of the present disclosure;

[0020] Figure 2 is a schematic diagram of a battery protection case provided by an embodiment of the present disclosure;

[0021] Figure 3 is a structural diagram of a battery protection case provided by an embodiment of the present disclosure;

[0022] Figure 4 is a schematic diagram of a battery assembly provided by another exemplary embodiment;

[0023] Figure 5 is a schematic diagram of a battery protection case provided by another exemplary embodiment;

[0024] Figure 6 is a schematic diagram of a battery protection case provided by yet another exemplary embodiment.

[0025] Description of the drawings: 1. Battery protective shell; 2. Shell; 21. Side wall; 22. Chamfer structure; 3. Metal parts; 31. Metal plate; 32. Connecting plate; 4. First flange; 5. Second flange; 6. Battery; 7. Gap. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that, in the absence of conflict, the embodiments in this disclosure and the feature vectors in the embodiments can be arbitrarily combined with each other.

[0027] As a core component of a device or system, it is vital to ensure the safety of new energy batteries. In related technologies, metal materials are usually used to produce battery protective shells. In order to avoid the battery shell taking up more space, the battery shell usually needs to be very thin, resulting in insufficient strength of the metal battery shell. When providing protection for the battery, the new energy battery will expand or contract during use. When the battery expands, the battery shell will also expand due to the force, but when the battery shrinks, the battery shell adjusts its shape according to the shape of the battery after shrinkage. That is, after the battery shrinks, the battery shell cannot return to the state of wrapping the battery, which leads to a decrease in the safety of protecting the battery, thereby affecting the performance and stability of the battery.

[0028] In order to solve the problems existing in the related art, the embodiments of the present disclosure provide a battery protective shell and a battery assembly, wherein the battery protective shell is used to wrap at least part of the surface of the battery, and the battery protective shell includes a shell and a metal part, wherein the shell is cylindrical, and the shell includes a plurality of side walls connected end to end in sequence, and the metal part is arranged on the inner side and / or outer side of the side wall. In the present disclosure, the battery protective shell is composed of a shell and a metal part, wherein the shell includes a plurality of side walls connected end to end in sequence, thereby forming the outer shape structure of the battery, and the metal part is arranged on the side of the side wall, so as to enhance the structure of the battery protective shell, and the battery protective shell can change as the battery is deformed, so as to continue to wrap the battery, thereby protecting the safety and stability of the battery.

[0029] In order to make the purpose, technical solution and beneficial effects of the embodiments of the present disclosure more clear, a battery protection case and a battery assembly provided by the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0030] According to the disclosed exemplary embodiments, Figures 1 to 6As shown, a battery protective shell and a battery assembly are shown. The battery protective shell 1 is used to wrap at least part of the surface of the battery 6 and protect the battery 6. The battery protective shell 1 includes a shell 2 and a metal part 3. The material of the shell 2 can be a glass fiber reinforced composite material. The shell 2 includes a plurality of side walls 21 connected end to end in sequence. The plurality of side walls 21 can be connected one by one to enclose a cylindrical structure. The shape of the shell 2 can be a square inner profile, a circular inner profile, or a special-shaped inner profile. The inner profile shape of the shell 2 is adaptively set according to the required external shape of the battery 6, so as to protect the battery 6, and the outer profile shape of the shell 2 can be adaptively set according to user needs, installation space restrictions, etc. In one example, the shell 2 in the battery protective shell 1 can be made of continuous glass fiber reinforced polypropylene unidirectional tape material. It should be noted that the continuous glass fiber reinforced polypropylene unidirectional tape is a unidirectional composite material prepared by continuous glass fiber and polypropylene through a special process, wherein the glass fiber content can be 65%-70%. The glass fiber reinforcement gives the polypropylene unidirectional tape good tensile and compressive strength, enabling it to withstand strong loads and stresses. The polypropylene material itself has a low density. Combined with the glass fiber reinforcement, the unidirectional tape has the advantage of being lightweight while maintaining strength. The battery 6 can have good strength and protection in the shell 2 of the battery protective shell 1.

[0031] like Figure 1 and Figure 2 As shown, the battery protective shell 1 also includes a metal part 3, which is used to enhance the structural strength of the battery protective shell 1, provide support or serve as other functional components. Since the battery protective shell 1 has the function of protecting the battery, by arranging the metal part 3 at different positions of the shell 2 in the battery protective shell 1, it is possible to adjust and optimize the performance of the battery protective shell 1, so as to enhance the additional protection of the battery 6 by the battery protective shell 1. In one example, the metal part 3 is arranged on the inner side and / or outer side of the side wall 21 to enhance the protection of the battery 6 by the battery protective shell 1. For example, the metal part 3 is located on the inner side of the side wall 21, which can provide additional protection for the internal components of the battery 6 and prevent the internal components of the battery 6 from being damaged by external impact or extrusion. At the same time, it can also enhance the internal structural stability of the shell 2, thereby effectively protecting the battery 6. Placing the metal part 3 on the inner side of the side wall 21 can also make the appearance of the shell 2 neater. For another example, Figure 1 As shown, the metal part 3 is located outside the side wall 21, which can provide an additional layer of protection for the battery 6 to prevent damage to the battery 6 caused by collision or extrusion of external objects, and the metal part 3 can shield external electromagnetic interference, improve the stability and safety of the battery 6 system, and the addition of the outer metal part 3 can enhance the overall structural strength of the shell 2, improve the compression and extrusion resistance, and thus effectively protect the battery 6. In addition, the metal part 3 can be made of a metal material with high thermal conductivity such as copper, so as to improve the heat distribution and heat dissipation capabilities of the battery 6 and improve safety.

[0032] In the present disclosure, the battery protective shell is composed of a shell and a metal part, wherein the shell includes a plurality of side walls connected end to end in sequence to form the outer structure of the battery, and the metal part is arranged on the side of the side wall to enhance the structural strength of the battery protective shell. The battery protective shell can change as the battery is deformed, so as to continue to wrap the battery, thereby protecting the safety and stability of the battery.

[0033] In some embodiments, the metal member 3 is in the form of a plate or a mesh. Figure 1 As shown, the metal part 3 is a plate-like structure, and the metal part 3 with a plate-like structure is attached to the side wall 21 of the shell 2. The metal part 3 with a plate-like structure can increase the surface area of ​​the metal part 3, thereby increasing the contact area with the shell 2, and can also enhance the strength of the overall structure of the battery protection shell 1, avoiding damage or extrusion deformation due to external impact, thereby helping to more effectively protect the battery 6. For another example, the metal part 3 is a mesh structure, and the metal part 3 with a mesh structure is attached to the side wall 21 of the shell 2. The metal part 3 with a mesh structure can improve the strength of the battery protection shell 1 while improving the air permeability, which helps to dissipate heat and maintain the normal operating temperature of the battery 6, reducing the risk of overheating of the battery 6, and the metal part 3 with a mesh structure helps to reduce the overall weight of the battery protection shell 1, which is convenient for adjustment and movement.

[0034] In some embodiments, Figure 1 and Figure 6 As shown, the metal part 3 can be made of shape memory metal, and has a first shape when the metal part 3 is at a first preset temperature. The inner side of the metal part 3 having the first shape is in contact with the surface of the battery 6 .

[0035] In an optional embodiment, when producing the battery protective shell 1, the battery protective shell 1 can be limited to a desired shape under a first preset temperature and a certain pressure, and the desired shape is also a shape that can normally cover the surface of the battery. When the battery 6 expands, the shape memory metal will deform based on its own superelastic properties to avoid severe extrusion between the battery 6 and cause damage to the battery. When the battery 6 no longer expands, for example, when the battery 6 shrinks, the temperature of the metal part 3 can be adjusted so that the battery protective shell 1 returns to its original shape. The first preset temperature can be, for example, room temperature of about 25°C.

[0036] In some embodiments, Figure 1 As shown, in the length direction of the housing 2 (such as Figure 1 in the x direction) and in the width direction (as shown in Figure 1In the y direction shown in FIG. 1 , each side wall 21 is provided with a plurality of metal parts 3. The number of metal parts 3 can be four or six, and can be adaptively set as needed. In this regard, the present disclosure does not make too many restrictions. The plurality of metal parts 3 can be interconnected as a whole or arranged at intervals. In one example, continue to refer to Figure 1 , multiple metal parts 3 are arranged along the extension direction of the side wall (such as Figure 1 The multiple metal parts 3 arranged at intervals (in the z direction as shown in FIG. 1 ), and the multiple metal parts 3 arranged at intervals help to enhance the heat dissipation effect of the battery protection shell 1, reduce the temperature of the battery 6 during operation, and thus improve performance and reliability.

[0037] In some embodiments, the metal part 3 is bonded, snapped or riveted to the side wall 21. For example, the metal part 3 is bonded to the side wall 21, that is, the metal part 3 and the shell 2 are firmly connected by adhesive, thereby providing good structural strength and stability for the battery protective shell 1, ensuring that the metal part 3 will not easily fall off or loosen from the shell 2, and a uniform connection interface can be formed by bonding, thereby improving the performance of the battery protective shell 1, preventing external impurities or liquids from penetrating, and protecting the battery 6 from damage. For another example, the metal part 3 is snapped to the side wall 21, so that the metal part 3 and the shell 2 can be detachably snapped, so that the metal part 3 can be easily replaced or maintained.

[0038] In one example, reference Figure 1 A through hole may be drilled in the side wall 21 of the shell 2, a metal member 3 may be provided on both the inner side and the outer shell of the shell 2, and the metal members 3 on the inner and outer sides of the side wall may be connected by rivets, screws, or the like.

[0039] In another example, refer to Figure 6 , shows a battery protection case provided with a U-shaped metal piece, the U-shaped metal piece 3 includes two metal plates 31 parallel to each other, and a connecting plate 32 for connecting the two metal plates, and the spacing between the two metal plates 31 is less than or equal to the thickness of the side wall 21. The U-shaped metal piece 3 can be installed on the housing by overlapping or clamping, and the length of the U-shaped metal piece 3 can be equal to the length of the side wall 21 to avoid partial bending of a single side wall.

[0040] In some embodiments, Figures 1 to 3 As shown, the shell 2 also includes a chamfer structure 22, which is used to connect two connected side walls 21. The shell 2 with the chamfer structure 22 has a simple manufacturing process and is easy to install on the battery 6, wherein the chamfer structure 22 and the two adjacent side walls 21 are an integrated structure, thereby simplifying the operating steps and assembly process in the manufacturing process, reducing production costs, and reducing the possibility of human errors.

[0041] In some embodiments, the chamfer structure 22 has a sharp chamfer structure or a round chamfer structure, for example, Figures 1 to 3 The chamfer structure 22 is a rounded chamfer, that is, the corners of the connection between the adjacent side walls 21 on the shell 2 adopt a rounded chamfer. The use of the rounded chamfer structure 22 not only helps to reduce the sharp edges of the corners and alleviate the pressure concentration on the shell 2, but also can improve the overall aesthetics and comfort of the battery protective shell 1.

[0042] In some embodiments, Figure 4 and Figure 5 As shown, the chamfered structure 22 protrudes from the outer side of the side wall 21, for example, Figure 4 As shown, in the length direction of the housing 2 (such as Figure 4 In the x direction shown in FIG, the chamfered structure 22 protrudes from the outside of the side wall 21, which is convenient for operators to hold during assembly, thereby reducing the possibility of sliding, thereby improving the stability of the battery protection shell 1 installed on the battery 6. For example, in the width direction of the shell 2 (as shown in FIG. Figure 4 In the y direction shown in FIG, the chamfered structure 22 may also protrude from the outside of the side wall 21 to facilitate the operator to hold it.

[0043] refer to Figure 4 It is understandable that when the battery 6 expands, the side wall 21 will not bend due to the metal part 3, but the chamfer structure 22 is not provided with the metal part 3, so the chamfer structure 22 will be deformed. Exemplarily, the distance between the side walls 21 increases, so that the "C"-shaped chamfer structure is deformed into a "(" shape, and the chamfer structure 22 can be made of a material with elastic recovery ability. When the battery 6 does not expand, the housing 2 can be restored to its original shape to provide protection for the battery 6.

[0044] In some embodiments, Figure 4 As shown, when the battery protection shell 1 and the battery 6 are assembled, there is a gap 7 between the inner side of the chamfered structure 22 and the outer surface of the battery 6 to ensure that the battery 6 can be smoothly assembled into the shell 2. Since the battery 6 will generate heat when in use, resulting in thermal expansion and contraction, the gap 7 between the chamfered structure 22 and the battery 6 can provide a certain space for the battery 6 to avoid excessive stress and influence on the battery protection shell 1 due to thermal expansion. At the same time, when the battery 6 has an abnormal situation, such as overheating or explosion, the gap 7 can play a role of buffering and isolation to avoid the splashing of battery 6 fragments, thereby improving safety.

[0045] In some possible embodiments, in the height direction of the housing 2 (eg Figure 1 In the z direction shown in FIG. 1 , the side wall 21 has a first end and a second end. In one example, as shown in FIG. Figures 1 to 6As shown, the first end of the side wall 21 is bent inward to form a first flange 4, which can be used to support the bottom surface of the battery 6 and can also be used to limit the position of the battery 6 to prevent the battery 6 from moving. Figures 1 to 5 As shown, the second end of the side wall 21 is bent toward the outside to form a second flange 5, which can enhance the structural strength and provide the second flange 5 for the operator to put the battery protection shell 1 into the battery 6 to protect the battery 6. In another example, the side wall 21 on the housing 2 has a first flange 4 and a second flange 5, the first flange 4 is bent toward the inside of the side wall 21, and the second flange 5 is bent toward the outside of the side wall 21. During the assembly process, the first flange 4 is used to support the bottom surface of the battery 6, which can ensure that the position of the battery 6 in the battery protection shell 1 is stable and firm to prevent displacement or shaking during use or transportation. The second flange 5 can facilitate the operator to hold and put the battery protection shell 1 on the battery 6 to protect the battery 6.

[0046] The present disclosure also provides a battery assembly, including a battery 6 and the above-mentioned battery protection shell 1, the battery protection shell 1 is mounted on the battery 6 and protects the battery 6, the battery assembly can be used in new energy equipment or systems, and provides power to enable the equipment or system to operate normally.

[0047] The use steps and manufacturing process of a battery protection shell and a battery assembly disclosed in the present invention are as follows:

[0048] like Figures 1 to 6 As shown, first, a continuous glass fiber reinforced polypropylene based unidirectional tape with a thickness of 0.265-0.305 mm is selected and cut to the required adaptability. For example, a unidirectional tape with a thickness of 0.280 mm can be used and cut to a width of 40 mm. At the same time, the mold for making the battery protective shell 1 is heated to any temperature value of 120°C-180°C.

[0049] Next, the unidirectional tape is placed on the mold and is stretched along one direction (such as Figure 1 The unidirectional tape is continuously wound clockwise or counterclockwise (in the direction A shown in FIG) to form the shell 2 shape structure of the battery protective shell 1, and then the shell 2 made of the unidirectional tape material is softened and bonded together using a hot drying gun at 150°C-250°C, and at the same time, the metal part 3 is arranged on the side wall of the shell 2 as needed to improve the structural strength of the battery protective shell 1.

[0050] Afterwards, the battery protective shell 1 containing the metal part 3 is hot-pressed into shape. The hot-pressing temperature can be any temperature value between 210°C and 240°C, and the hot-pressing time can be any time between 2 and 3 minutes each time. After hot-pressing, it can be cooled and shaped by cooling water or a curved plate. The cooling temperature can be 10°C-50°C, and the cooling time can be any time between 1 and 2 minutes each time.

[0051] Finally, the manufactured battery protective shell 1 is installed on the matching battery 6 to form a battery assembly. The battery protective shell 1 deforms as the battery 6 deforms during use, and the metal parts in the battery protective shell 1 can restore it to its original position, that is, the battery protective shell 1 expands as the battery 6 expands, and contracts as the battery 6 contracts, so that it can continue to wrap and protect the battery, thereby improving the safety and stability of the battery.

[0052] It should be noted that the values ​​of the above-mentioned temperature and time can be any values ​​within the range and can be set accordingly as needed. In this regard, the present disclosure will not go into details or list the embodiments one by one.

[0053] In the description of the present disclosure, it is necessary to understand that the orientation or positional relationship indicated by the terms "upper" and "lower" etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present disclosure, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0056] The descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments" or "an example" etc. mean that the specific features, structures, steps or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, steps or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A battery protective shell, characterized in that: Used to wrap at least part of the surface of the battery, the battery protection shell includes: The shell is cylindrical, the shell comprises a plurality of side walls connected end to end, and the shell is made of glass fiber reinforced composite material; The metal part is arranged on the inner side and / or the outer side of the side wall.

2. The battery protection case according to claim 1, characterized in that: The metal piece is in a plate shape or a mesh shape.

3. The battery protection case according to claim 2, characterized in that: The metal piece is made of shape memory metal, and has a first shape when at a first preset temperature. The inner side of the metal piece having the first shape is in contact with the surface of the battery.

4. The battery protection case according to claim 2, characterized in that: In the length and width directions of the shell, each of the side walls is provided with a plurality of the metal parts, and the plurality of the metal parts are arranged at intervals along the extension direction of the side wall.

5. The battery protection case according to claim 2, characterized in that: The metal member comprises two metal plates parallel to each other, and a connecting plate for connecting the two metal plates; The two metal plates are parallel to each other, and a distance between the two metal plates is less than or equal to a thickness of the side wall.

6. The battery protection case according to any one of claims 1 to 5, characterized in that: The metal part is connected to the side wall by bonding, clamping or riveting.

7. The battery protection case according to any one of claims 1 to 5, characterized in that: The housing further comprises a chamfered structure, and the chamfered structure is used to connect the two connected side walls; Wherein, the chamfered structure and the two adjacent side walls are an integral structure.

8. The battery protection case according to claim 7, characterized in that: In the length and / or width direction of the shell, the chamfered structure protrudes from the outer side of the side wall.

9. The battery protection case according to claim 8, characterized in that: In the assembled state, there is a gap between the inner side of the chamfered structure and the outer surface of the battery.

10. A battery assembly, characterized in that: It comprises a battery and a battery protection shell as described in any one of claims 1 to 9.

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