Shell structure, battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a shell structure, a battery and electric equipment. The anti-explosion valve is arranged on the first shell face of the shell, the anti-explosion valve comprises an anti-explosion piece, a nick part and a material connecting part, the nick part and the material connecting part are arranged on the periphery of the anti-explosion piece in a surrounding mode, the nick part is formed by locally thinning the shell in the direction perpendicular to the plane where the first shell face is located, and the material connecting part is suitable for connecting the area, located outside the anti-explosion piece, of the shell with the anti-explosion piece; the nick part comprises a first line segment and a second line segment; in the direction perpendicular to the plane where the first shell face is located, the thickness of the first line segment is M1, the thickness of the second line segment is M2, the thickness of the material connecting part is M3, and M2 is larger than or equal to M1 and smaller than or equal to M3. According to the shell structure provided by the utility model, the nick part adopts the unequal-thickness design, and the weak area with stress concentration is thickened, so that the weak area can be prevented from losing efficacy due to accidental stress, and the consistency of opening pressure can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technical field, concretely relates to a shell structure, battery and electric equipment. BACKGROUND

[0002] The battery is usually provided with an explosion-proof valve, when a chemical reaction occurs and a large amount of gas is generated in the battery due to overpressure or abnormal temperature rise, the explosion-proof valve will be opened under pressure to rapidly release the high-pressure gas in the battery, thereby preventing the battery from exploding.

[0003] When the internal pressure of the battery reaches the opening pressure of the explosion-proof valve, the explosion-proof valve will tear at the notch. However, in the related art, due to the influence of product specifications, sizes, design shapes, machining accuracy and other factors, stress concentration will exist in the local position of the explosion-proof valve. Under the working conditions of vibration and impact, the position of stress concentration is prone to failure due to accidental stress, and it is difficult to ensure the consistency of the opening pressure. SUMMARY

[0004] Therefore, the utility model provides a shell structure, battery and electric equipment to solve the problem that the local position of the explosion-proof valve is prone to failure when stress concentration exists.

[0005] In a first aspect, the utility model provides a shell structure, comprising:

[0006] a shell;

[0007] an explosion-proof valve arranged on a first shell surface of the shell, the explosion-proof valve comprising an explosion-proof sheet and a notch portion and a connecting portion arranged around the outer periphery of the explosion-proof sheet, the notch portion being formed by locally thinning the shell in a direction perpendicular to the plane of the first shell surface, and the connecting portion being adapted to connect the area of the shell outside the explosion-proof sheet to the explosion-proof sheet;

[0008] the notch portion comprises a first line segment and a second line segment; in the direction perpendicular to the plane of the first shell surface, the thickness of the first line segment is M1, the thickness of the second line segment is M2, and the thickness of the connecting portion is M3, satisfying: M1≤M2≤M3.

[0009] Advantages: the shell structure provided by the embodiment of the utility model has the advantages that the notch portion is designed to have different thicknesses, the thickness M1 of the first line segment is less than or equal to the thickness M2 of the second line segment, and the thickness M2 of the second line segment is less than or equal to the thickness M3 of the connecting portion. In particular, the weak area of the notch portion where stress concentration exists is thickened, thereby avoiding failure of the weak area due to accidental stress, and facilitating the consistency of the opening pressure. This is conducive to improving the shock resistance of the explosion-proof valve.

[0010] In an alternative embodiment, M1

[0011] Beneficial effects: by limiting the thickness of the first line segment, the second line segment and the connecting material part, the three are designed with unequal thickness, especially the score part 21 in the stress concentration weak area is thickened, so as to avoid the failure of the weak area under accidental stress, and to ensure the consistency of the opening pressure. It is beneficial to improve the anti-shock strength of the explosion-proof valve 2.

[0012] In an optional embodiment, the first line segment includes a straight line segment, and the second line segment includes an arc line segment.

[0013] Alternatively, the first line segment includes an arc line segment, and the second line segment includes a straight line segment.

[0014] Beneficial effects: when the weak area of the explosion-proof valve is at the position of the arc line segment, that is, the second line segment includes an arc line segment, under the working conditions of vibration and impact, the arc line segment is more likely to burst open and fail. By thickening the arc line segment, on the one hand, the local stress can be reduced to avoid accidental burst of the arc line segment, and on the other hand, by adopting unequal thickness design, the thickness of the arc line segment is greater than that of the straight line segment, which can make the straight line segment open first under pressure, and then make the arc line segment open, while the connecting material part remains connected with the shell at all times, making the entire opening process smoother. When the weak area of the explosion-proof valve is at the position of the straight line segment, that is, the second line segment includes a straight line segment, by setting the thickness of the straight line segment to be greater than that of the arc line segment, it can be ensured that the straight line segment will not burst open before the arc line segment under the working conditions of vibration and impact, avoiding the failure of the straight line segment due to accidental stress, and ensuring the consistency of the opening pressure.

[0015] In an optional embodiment, the straight line segment is arranged separately from the connecting material part, and the two ends of the straight line segment are connected to the connecting material part via two arc line segments.

[0016] In an optional embodiment, in the direction perpendicular to the plane where the first shell surface is located, the thickness M3 of the connecting material part is equal to the thickness H of the first shell surface.

[0017] Beneficial effects: by making the thickness M3 of the connecting material part equal to the thickness H of the first shell surface, on the one hand, the strength of the connecting material part can be ensured to avoid tearing at the connecting material part position under the push of high-temperature medium, so as to ensure that the explosion-proof sheet and the shell are in a connected state, avoid the explosion-proof sheet flying out, and reduce the risk of accidental short circuit caused by the random scattering of the explosion-proof sheet. On the other hand, the thickness M3 of the connecting material part is equal to the thickness H of the first shell surface, which facilitates the integral molding of the explosion-proof valve and the shell, and reduces the processing procedures.

[0018] In an optional embodiment, in the direction perpendicular to the plane where the first shell surface is located, the ratio of the thickness M1 of the first line segment to the thickness H of the first shell surface satisfies: 0.1≤M1 / H≤1;

[0019] And / or, in the direction perpendicular to the plane where the first shell surface is located, the ratio of the thickness M2 of the second line segment to the thickness H of the first shell surface satisfies: 0.1≤M2 / H≤1.

[0020] Beneficial effects: by limiting the upper limit of the ratio of the thickness M1 of the first line segment to the thickness H of the first shell surface, it can be ensured that when the battery is in thermal runaway, the explosion-proof valve will preferentially form a tear along the first line segment of the score part. And by limiting the lower limit of the ratio of the thickness M1 of the first line segment to the thickness H of the first shell surface, the opening pressure can be guaranteed, and the condition that the first line segment of the score part fails due to accidental stress can be avoided. Similarly, by limiting the upper limit of the ratio of the thickness M2 of the second line segment to the thickness H of the first shell surface, it can be ensured that when the battery is in thermal runaway, the explosion-proof valve will preferentially form a tear along the second line segment of the score part. And by limiting the lower limit of the ratio of the thickness M2 of the second line segment to the thickness H of the first shell surface, the opening pressure can be guaranteed, and the condition that the second line segment of the score part fails due to accidental stress can be avoided.

[0021] In an optional embodiment, the score part includes two side walls connected to the surface of the first shell surface, and the included angle between the planes where the two side walls are located is F, which satisfies: 15°≤F≤80°.

[0022] Beneficial effects: by limiting the included angle F between the planes where the two side walls are located to 15°≤F≤80°, the score part can be designed with a V-angle, which is beneficial to improve the structural strength of the score part, and at the same time facilitates processing and stamping, reduces stress concentration during forming, and helps improve the consistency of the opening pressure of the explosion-proof valve.

[0023] In an optional embodiment, the score part further includes a bottom wall away from the surface of the first shell surface, the bottom wall is connected to the two side walls, and the minimum distance between the bottom wall and the two side walls is K, which satisfies: 0.02mm≤K≤0.2mm.

[0024] Beneficial effects: by limiting the upper limit of the minimum distance K between the bottom wall and the two side walls, the condition of reduced structural stability caused by excessive width of the score part can be avoided, which helps to ensure the consistency of the opening pressure of the explosion-proof valve. And by limiting the lower limit of the minimum distance K between the bottom wall and the two side walls, the formation of the score part can be ensured, and when the internal gas pressure of the battery reaches the opening pressure of the explosion-proof valve, the explosion-proof valve will tear at the score part.

[0025] In a second aspect, the utility model also provides a battery, which comprises: the shell structure as described above, and an electric core arranged in the shell structure.

[0026] Because the battery comprises the shell structure, it has the same effects as the shell structure, which will not be repeated here.

[0027] In a third aspect, the utility model also provides a kind of electric equipment, comprising: battery as described above.

[0028] Because electric equipment includes shell structure, with the same effect of shell structure, here no longer repeat. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the embodiment of the utility model or the technical scheme in prior art, the drawings needed in the embodiment or the prior art description will be simply introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor based on these drawings.

[0030] Figure 1 It is the top view of shell structure of the utility model;

[0031] Figure 2 It is Figure 1 enlargement of B in middle; Figure 1 ;

[0032] Figure 3 It is Figure 1 enlargement of B in middle; Figure 2 ;

[0033] Figure 4 It is Figure 1 schematic view of A-A section in middle;

[0034] Figure 5 It is Figure 4 enlargement of C in middle.

[0035] EXPLANATION OF REFERENCE NUMERALS:

[0036] 1, shell;11, first shell surface;2, explosion-proof valve;21, score part;211, straight line segment;212, arc segment;22, material connecting part;23, explosion-proof sheet;201, side wall;202, bottom wall. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model, obviously, the described embodiment is part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the utility model.

[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] Batteries are typically equipped with explosion-proof valves. When a chemical reaction occurs inside the battery due to overpressure or abnormal temperature rise, producing a large amount of gas, the explosion-proof valve will open under pressure, quickly releasing the high-pressure gas inside, thereby preventing the battery from exploding.

[0042] When the internal pressure of the battery reaches the opening pressure of the explosion-proof valve, the valve will tear at the scored area. However, after the explosion-proof valve is manufactured, due to factors such as product specifications, dimensions, design shape, and processing precision, stress concentration may occur in certain areas, creating weak points. Under conditions of vibration and impact, these weak points are prone to failure due to unexpected stress, making it difficult to guarantee consistent opening pressure. Combined with... Figure 3 As shown, the grooved portion 21 of the explosion-proof valve often includes a straight section 211 and an arc section 212. For different specifications of explosion-proof valves, sometimes the weak area may be at the position of the straight section 211, and sometimes the weak area may be at the position of the arc section 212.

[0043] The shell structure provided in the embodiments of this utility model adopts an unequal thickness design for the scored portion 21, especially by thickening the weak areas where stress concentration exists in the scored portion 21, thereby avoiding failure of the weak areas due to accidental stress and helping to ensure consistent opening pressure.

[0044] The following is combined Figures 1 to 5The embodiment of the utility model discloses.

[0045] According to the embodiment of the utility model, on the one hand, a shell structure is provided, which comprises:

[0046] The shell 1 comprises a shell body and a cover plate.

[0047] The explosion-proof valve 2 is arranged on the first shell surface 11 of the shell 1, and the explosion-proof valve 2 comprises an explosion-proof sheet 23 and a score portion 21 and a connecting portion 22 arranged around the outer periphery of the explosion-proof sheet 23.

[0048] The score portion 21 comprises a first line segment and a second line segment; in the direction perpendicular to the plane of the first shell surface 11, the thickness of the first line segment is M1, the thickness of the second line segment is M2, and the thickness of the connecting portion 22 is M3, and the following conditions are met: M1≤M2≤M3.

[0049] The shell 1 of the embodiment can specifically comprise a shell body and a cover plate, wherein the shell body is configured in a cylindrical shape, at least one end of the shell body along the length direction is formed with an opening portion, specifically, both ends of the shell body along the length direction can be formed with opening portions, and the cover plate is arranged at the opening portion to form a closed shell 1 together with the shell body, and an installation cavity suitable for placing an electric core is formed in the shell 1.

[0050] The shell body can be made of a metal plate through stamping, winding, welding and other processes.

[0051] The shell 1 can be triangular, rectangular, trapezoidal, pentagonal or other polygonal structures; the embodiment takes the rectangular structure of the shell 1 as an example for description.

[0052] The explosion-proof valve 2 is arranged on the first shell surface 11 of the shell 1, wherein the first shell surface 11 can be one side of the shell body, and the first shell surface 11 can also be the cover plate.

[0053] In addition, when the explosion-proof valve 2 is designed on the cover plate, the explosion-proof valve 2 is prone to be on the same side as the electronic components, and when the explosion-proof valve 2 is opened to release pressure, the high-temperature medium can damage the electronic components, causing the vehicle to catch fire and explode. The explosion-proof valve 2 is preferably arranged on the side surface of the shell body, which can keep the explosion-proof valve 2 away from the electronic components arranged at the end surface of the shell, avoid damage to the electronic components by the high-temperature medium when the valve is opened to release pressure, facilitate thermal-electric separation, improve the safety of the vehicle, and reduce safety hazards.

[0054] The explosion-proof valve 2 can be formed by a notched portion 21 partially thinned from the first shell surface 11 of the shell 1, wherein the notched portion 21 can be formed by laser notching, mechanical machining or chemical etching.

[0055] The explosion-proof valve 2 includes an explosion-proof sheet 23 and a notched portion 21 and a connecting portion 22 arranged around the outer periphery of the explosion-proof sheet 23, the notched portion 21 is partially thinned from the shell 1 in a direction perpendicular to the plane of the first shell surface 11, and the connecting portion 22 is adapted to connect the area of the shell 1 outside the explosion-proof sheet 23 to the explosion-proof sheet 23; in this embodiment, the notched portion 21 and the connecting portion 22 are connected end to end to form a continuous annular shape. Since the notched portion 21 is partially thinned from the shell 1 in a direction perpendicular to the plane of the first shell surface 11, when the battery is in thermal runaway, the explosion-proof valve 2 will tear along the notched portion 21, and then the explosion-proof sheet 23 will be turned outwards under the push of the high-temperature medium, and since the connecting portion 22 connects the area of the shell 1 outside the explosion-proof sheet 23 to the explosion-proof sheet 23, the explosion-proof sheet 23 and the shell 1 can be kept in a connected state, avoiding the explosion-proof sheet 23 from flying out and reducing the risk of accidental short circuit caused by the random scattering of the explosion-proof sheet 23.

[0056] The notched portion 21 includes a first line segment and a second line segment. In some embodiments, the first line segment includes a straight line segment 211, and the second line segment includes an arc line segment 212; or the first line segment includes an arc line segment 212, and the second line segment includes a straight line segment 211.

[0057] The shell structure provided by the embodiments of the utility model has the advantages that the notched portion 21 is designed to have different thicknesses, the thickness M1 of the first line segment is less than or equal to the thickness M2 of the second line segment, and the thickness M2 of the second line segment is less than or equal to the thickness M3 of the connecting portion 22. In particular, the weak area where stress is concentrated is thickened, so that the weak area can be prevented from being damaged due to accidental stress, and the opening pressure consistency can be ensured, and the anti-shock strength of the explosion-proof valve 2 can be improved.

[0058] It should be noted that the above description is only a specific implementation of the shell structure, and the shell structure is not limited to the above description. Figure 5As shown, only the thickness M of the score portion 21 in the direction perpendicular to the plane where the first shell surface 11 is located is shown in the figure, and the thickness M1 of the first linear segment, the thickness M2 of the second linear segment, and the thickness M3 of the connecting portion 22 are not further shown. It can be understood that the thickness M1 of the first linear segment, the thickness M2 of the second linear segment, and the thickness M3 of the connecting portion 22 are all the thickness of a certain region of the score portion 21 in the direction perpendicular to the plane where the first shell surface 11 is located, and thus any one of M1, M2, and M3 can be indicated by M.

[0059] Due to the influence of product specification size, design shape, machining precision, and other factors, the positions of the weak regions of different specifications of the explosion-proof valve change, for example, the weak region of some explosion-proof valve 2 can be at the position of the linear segment 211, and the weak region of some explosion-proof valve 2 can be at the position of the arc segment 212. The specific position of the weak region can be measured by experiment. The weak region where stress concentration exists in the score portion 21 is thickened, which is more conducive to ensuring the consistency of the opening pressure.

[0060] Taking the case where the weak region of the explosion-proof valve 2 is at the position of the arc segment 212 as an example, under the working conditions of vibration and impact, the arc segment 212 is more likely to burst open and fail. By making the arc segment 212 a little thicker, on the one hand, the local stress can be reduced to avoid accidental burst opening of the arc segment 212, and on the other hand, by adopting the unequal thickness design, the thickness of the arc segment 212 is greater than the thickness of the linear segment 211, which can make the linear segment 211 open first when pressure is applied, and then make the arc segment 212 open, while the connecting portion 22 remains connected with the shell 1 at all times, making the entire opening process smoother.

[0061] As another example, taking the case where the weak region of the explosion-proof valve 2 is at the position of the linear segment 211 as an example, by setting the thickness of the linear segment 211 to be greater than the thickness of the arc segment 212, it can be ensured that under the working conditions of vibration and impact, the linear segment 211 will not burst open before the arc segment 212, avoiding the failure of the linear segment 211 due to accidental stress, and ensuring the consistency of the opening pressure.

[0062] In some embodiments, M1 < M2 < M3 is satisfied.

[0063] By further limiting the thicknesses of the first linear segment, the second linear segment, and the connecting portion 22, and adopting the unequal thickness design, especially thickening the weak region where stress concentration exists in the score portion 21, the failure of the weak region due to accidental stress can be avoided, which is conducive to ensuring the consistency of the opening pressure. It is conducive to improving the anti-shock strength of the explosion-proof valve 2.

[0064] In some embodiments, the linear segment 211 is arranged to be spaced apart from the connecting portion 22, and the two ends of the linear segment 211 are connected to the connecting portion 22 via two arc segments 212, respectively.

[0065] In this embodiment, the straight line segment 211 is parallel to and spaced apart from the connecting material portion 22, the two endpoints of the straight line segment 211 are L1 and L2 respectively, and the two endpoints of the connecting material portion 22 are L3 and L4 respectively, wherein one arc segment 212 is connected between the endpoint L1 and the endpoint L3, and the other arc segment 212 is connected between the endpoint L2 and the endpoint L4. The score portion 21 and the connecting material portion 22 are connected end to end to form a continuous ring.

[0066] In some embodiments, in the direction perpendicular to the plane where the first shell surface 11 is located, the thickness M3 of the connecting material portion 22 is equal to the thickness H of the first shell surface 11.

[0067] By making the thickness M3 of the connecting material portion 22 equal to the thickness H of the first shell surface 11, on the one hand, the strength of the connecting material portion 22 can be ensured, and tearing at the position of the connecting material portion 22 under the push of high-temperature medium can be avoided, so that the explosion-proof disc 23 and the shell 1 can be kept in a connected state, and the explosion-proof disc 23 can be prevented from flying out, thereby reducing the risk of accidental short circuit caused by the explosion-proof disc 23 scattering randomly. On the other hand, the thickness M3 of the connecting material portion 22 is equal to the thickness H of the first shell surface 11, which facilitates the integrated molding of the explosion-proof valve 2 and the shell 1, and reduces the processing procedures.

[0068] In some embodiments, in the direction perpendicular to the plane where the first shell surface 11 is located, the ratio of the thickness M1 of the first line segment to the thickness H of the first shell surface 11 satisfies: 0.1≤M1 / H≤1;

[0069] And / or, in the direction perpendicular to the plane where the first shell surface 11 is located, the ratio of the thickness M2 of the second line segment to the thickness H of the first shell surface 11 satisfies: 0.1≤M2 / H≤1.

[0070] By limiting the upper limit of the ratio of the thickness M1 of the first line segment to the thickness H of the first shell surface 11, it can be ensured that when the battery is in thermal runaway, the explosion-proof valve 2 will preferentially form a tear along the first line segment of the score portion 21. And by limiting the lower limit of the ratio of the thickness M1 of the first line segment to the thickness H of the first shell surface 11, the opening pressure can be ensured, and the failure of the first line segment of the score portion 21 due to accidental stress can be avoided. Similarly, by limiting the upper limit of the ratio of the thickness M2 of the second line segment to the thickness H of the first shell surface 11, it can be ensured that when the battery is in thermal runaway, the explosion-proof valve 2 will preferentially form a tear along the second line segment of the score portion 21. And by limiting the lower limit of the ratio of the thickness M2 of the second line segment to the thickness H of the first shell surface 11, the opening pressure can be ensured, and the failure of the second line segment of the score portion 21 due to accidental stress can be avoided.

[0071] Exemplarily, in the embodiment, the value of M1 / H can be 0.1 or 0.2 or 0.3 or 0.4 or 0.5 or 0.6 or 0.7 or 0.8 or 0.9 or 1, etc., or an interval range formed by any two of the above values.

[0072] Exemplarily, in the embodiment, the value of M2 / H can be 0.1 or 0.2 or 0.3 or 0.4 or 0.5 or 0.6 or 0.7 or 0.8 or 0.9 or 1, etc., or an interval range formed by any two of the above values.

[0073] In some embodiments, the score portion 21 comprises two side walls 201 connected with the surface of the first shell surface 11, and the included angle between the planes where the two side walls 201 are located is F, which satisfies: 15°≤F≤80°.

[0074] By setting the included angle F between the planes where the two side walls 201 are located to be 15°≤F≤80°, the score portion 21 can be designed as a V-angle, which is beneficial to improve the structural strength of the score portion 21, and facilitates the processing stamping and reduces the stress concentration caused in the forming process, thereby helping to improve the consistency of the opening pressure of the explosion-proof valve.

[0075] Exemplarily, in the embodiment, the value of F can be 15° or 18° or 20° or 25° or 30° or 37° or 42° or 45° or 51° or 60° or 68° or 72° or 78° or 80°, etc., or an interval range formed by any two of the above values.

[0076] In some embodiments, the score portion 21 further comprises a bottom wall 202 away from the surface of the first shell surface 11, the bottom wall 202 is connected with the two side walls 201, and the minimum distance between the bottom wall 202 and the two side walls 201 is K, which satisfies: 0.02mm≤K≤0.2mm.

[0077] By limiting the upper limit of the minimum distance K between the bottom wall 202 and the two side walls 201, the situation that the structural stability is reduced due to the excessive width of the score portion 21 can be avoided, which helps to ensure the consistency of the opening pressure of the explosion-proof valve. And by limiting the lower limit of the minimum distance K between the bottom wall 202 and the two side walls 201, the formation of the score portion 21 can be ensured, so that when the internal pressure of the battery reaches the opening pressure of the explosion-proof valve 2, the explosion-proof valve 2 will tear at the score portion 21.

[0078] Exemplarily, in the embodiment, the value of K can be 0.02mm or 0.08mm or 0.1mm or 0.12mm or 0.15mm or 0.18mm or 0.2mm, etc., or an interval range formed by any two of the above values.

[0079] According to the embodiment of the utility model, on the other hand, a battery is also provided, which comprises the shell structure as above and an electric core arranged in the shell structure.

[0080] The battery of the embodiment can be applied to scenarios requiring high safety and reliability, such as electric vehicles, electric bicycles, electric aircrafts, etc.

[0081] According to the embodiment of the utility model, on the other hand, a battery is also provided, which comprises the shell structure as above and an electric core arranged in the shell structure.

[0082] In the embodiment, the valve opening direction of the battery is preferably downward, thereby avoiding the invasion of the smoke and fire into the member compartment and improving the safety.

[0083] The electric device of the embodiment can be an electric vehicle, an electric bicycle, an electric aircraft, etc.

[0084] Obviously, the above embodiments are only examples for clearly illustrating, rather than limiting the embodiments. Although the embodiments of the utility model are described in combination with the drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the utility model.

Claims

1. A shell structure, characterized in that, include: Shell (1); An explosion-proof valve (2) is disposed on the first shell surface (11) of the housing (1). The explosion-proof valve (2) includes an explosion-proof plate (23) and a grooved portion (21) and a connecting portion (22) surrounding the outer periphery of the explosion-proof plate (23). The grooved portion (21) is formed by partially thinning the housing (1) in a direction perpendicular to the plane where the first shell surface (11) is located. The connecting portion (22) is adapted to connect the area of ​​the housing (1) outside the explosion-proof plate (23) to the explosion-proof plate (23). The etched portion (21) includes a first line segment and a second line segment; in the direction perpendicular to the plane where the first shell surface (11) is located, the thickness of the first line segment is M1, the thickness of the second line segment is M2, and the thickness of the connecting portion (22) is M3, satisfying: M1≤M2≤M3.

2. The shell structure according to claim 1, characterized in that, The following condition must be met: M1 < M2 < M3.

3. The shell structure according to claim 1, characterized in that, The first line segment includes a straight line segment (211), and the second line segment includes an arc segment (212); Alternatively, the first line segment may include an arc segment (212), and the second line segment may include a straight line segment (211).

4. The shell structure according to claim 3, characterized in that, The straight segment (211) is spaced apart from the connecting part (22), and the two ends of the straight segment (211) are connected to the connecting part (22) via two arc segments (212).

5. The shell structure according to claim 1, characterized in that, In the direction perpendicular to the plane where the first shell surface (11) is located, the thickness M3 of the connecting part (22) is equal to the thickness H of the first shell surface (11).

6. The shell structure according to claim 1, characterized in that, In the direction perpendicular to the plane where the first shell surface (11) is located, the ratio of the thickness M1 of the first line segment to the thickness H of the first shell surface (11) satisfies: 0.1≤M1 / H≤1; And / or, in the direction perpendicular to the plane where the first shell surface (11) is located, the ratio of the thickness M2 of the second line segment to the thickness H of the first shell surface (11) satisfies: 0.1≤M2 / H≤1.

7. The shell structure according to any one of claims 1 to 6, characterized in that, The etched portion (21) includes two sidewalls (201) connected to the surface of the first shell surface (11), and the included angle between the planes containing the two sidewalls (201) is F, which satisfies: 15°≤F≤80°.

8. The shell structure according to claim 7, characterized in that, The etched portion (21) also includes a bottom wall (202) on a surface away from the first shell surface (11). The bottom wall (202) is connected to the two side walls (201). The minimum distance between the bottom wall (202) and the two side walls (201) is K, which satisfies: 0.02mm≤K≤0.2mm.

9. A battery, characterized in that, It includes a housing structure as described in any one of claims 1 to 8, and a battery cell disposed within the housing structure.

10. An electrical appliance, characterized in that, Includes the battery as described in claim 9 above.

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