Housing and battery

Abstract

The utility model relates to battery technology field provides a kind of shell and battery, above-mentioned shell is applied to battery, shell has accommodating cavity, the height direction of shell has mounting hole in one side, mounting hole is used to install explosion-proof valve;The inner wall of side edge where mounting hole is located is equipped with first recess, first recess is through setting along the length direction of shell, and is communicated with explosion-proof valve setting, to form exhaust passage.The shell provided by the utility model improves the stability of internal exhaust of battery cell, enhances the safety performance of battery cell, and without setting side plate support pole group, simplifies manufacturing and assembly process.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a casing and a battery. Background Technology

[0002] Current power battery structures typically place the electrode assembly within the housing cavity. The electrode assembly is formed by stacking positive and negative electrode plates and a separator. After the electrode assembly is stacked, it is installed and sealed inside the housing. To achieve thermoelectric separation of the battery, an explosion-proof valve is installed on the side of the housing. The electrode assembly abuts against the inner wall of the housing, which restricts the exhaust passage in the area where the explosion-proof valve is located, affecting the exhaust speed of the explosion-proof valve. Utility Model Content

[0003] This utility model provides a housing and a battery to solve the problem in the prior art where the exhaust channel is restricted and the exhaust speed is affected when the explosion-proof valve is installed on the side of the housing.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, the present invention provides a housing for use in a battery. The housing has a receiving cavity and a mounting hole on one side in the height direction for mounting an explosion-proof valve. The inner wall of the side where the mounting hole is located is provided with a first groove, which extends through the length direction of the housing and communicates with the explosion-proof valve to form an exhaust channel.

[0005] According to the present invention, a housing is further provided with a second groove; The second groove is located at the bottom of the first groove and extends through the length of the housing. The second groove, together with the first groove and the explosion-proof valve, forms the exhaust channel.

[0006] According to the present invention, a housing is provided with a plurality of second grooves, which are arranged side by side at intervals.

[0007] According to the present invention, the width of the first groove along the width direction of the housing is w1, and the width of the inner wall of the side where the mounting hole is located is w, and w and w1 satisfy: 0.4≤(w-w1) / w≤0.8.

[0008] According to the present invention, the wall thickness of the side where the mounting hole is located is H, and the wall thickness of the side of the housing adjacent to the side where the mounting hole is located is h. H satisfies: 0.8mm≤H≤3mm, h satisfies: 0.3mm≤h≤1.5mm, and H>h.

[0009] According to the present invention, the depth of the first groove is H1, the depth of the second groove is H2, the distance between the bottom of the second groove and the outer wall of the side of the housing is H3, and the wall thickness of the side where the mounting hole is located is H, satisfying: H3≥h; 30%≤(H1+H2) / H≤60%.

[0010] According to the present invention, the width of the first groove is w1 and the width of the second groove is w2 along the width direction of the shell. The number of the second grooves is n, and w1 and w2 satisfy: 0≤(n*w2) / w1≤100%.

[0011] According to the present invention, the opening of the first groove is flared along the length of the housing, and the small end of the flared structure is oriented toward the side close to the mounting hole. And / or, the opening of the second groove is flared, with the smaller end of the flared structure facing the side closest to the mounting hole.

[0012] According to the housing provided by this utility model, the groove ends of the first groove and the second groove are both provided with chamfers; And / or, the thickness of the side of the housing having the mounting hole is greater than the thickness of the other sides of the housing.

[0013] Secondly, this utility model provides a battery, comprising: The housing, as described above; The electrode assembly is disposed within the receiving cavity and abuts against the inner wall of the side of the housing with the mounting hole; An explosion-proof valve, wherein the explosion-proof valve is embedded in the mounting hole; A top cover is provided at the opening end of the receiving cavity.

[0014] The housing and battery provided by this utility model have a first groove on the inner wall of the side where the mounting hole is located. The first groove runs through the length of the housing, so that the explosion-proof valve is connected to the first groove to form an exhaust channel. This channel is used to discharge the high-temperature gas of the electrode group to the explosion-proof valve in a timely manner and discharge it out of the housing through the explosion-proof valve. This improves the stability of the exhaust inside the cell and enhances the safety performance of the cell. Furthermore, since the side of the electrode group facing the housing is not uniformly attached to the inner wall of the housing, there is no need to set a side plate to support the electrode group, which simplifies the manufacturing and assembly process. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the shell provided by this utility model.

[0017] Figure 2 This utility model provides Figure 1 Enlarged view of part K.

[0018] Figure 3 This is a schematic diagram of the main structure of the shell provided by this utility model.

[0019] Figure 4 This utility model provides Figure 3 Enlarged view of the R part.

[0020] Figure 5 This is an exploded view of the battery provided by this utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of the battery provided by this utility model.

[0022] Figure 7 This is a top view of the battery provided by this utility model.

[0023] Figure 8 This utility model provides Figure 7 AA sectional view.

[0024] Figure label: 1. Shell; 11. Mounting hole; 12. First groove; 13. Second groove; 2. Pole assembly; 3. Explosion-proof valve; 4. Top cover. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of clarifying the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0028] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] The following is combined with Figures 1 to 8The casing and battery provided in this utility model will be described in detail through specific embodiments and application scenarios.

[0031] Firstly, such as Figure 1 and Figure 2 As shown, this embodiment provides a housing 1 for use in a battery. The housing 1 has a receiving cavity. One side of the housing 1 in the height direction has a mounting hole 11 for mounting an explosion-proof valve 3. The inner wall of the side where the mounting hole 11 is located is provided with a first groove 12. The first groove 12 is provided through the length direction of the housing 1 and is connected to the explosion-proof valve 3 to form an exhaust channel.

[0032] Understandably, the housing 1 in this embodiment includes four sequentially connected sides, which are connected end-to-end to form a receiving cavity for accommodating the battery electrode assembly 2. To achieve thermoelectric separation of the battery, the explosion-proof valve 3 in this embodiment is located on the side of the housing 1 in the width direction, and is not located on the top cover 4. In the event of thermal runaway, the high-temperature gas inside the electrode assembly 2 is discharged from the housing 1 through the explosion-proof valve 3, which is different from the path by which the current is transferred from the tabs through the terminals on the top cover 4.

[0033] A mounting hole 11 is provided on the side of the housing 1 in the width direction. The explosion-proof valve 3 is embedded in the mounting hole 11 and is integrally formed with the side of the housing 1 by laser welding. Typically, the mounting hole 11 is located in the middle of the side of the housing 1, meaning the explosion-proof valve 3 is installed in the middle of the side of the housing 1. When the battery is in use, the side of the housing 1 where the explosion-proof valve 3 is located is placed at the bottom of the battery, and the electrode assembly 2 is pressed against the inner wall of the side of the housing 1 containing the explosion-proof valve 3. Since the lower side of the electrode assembly 2 abuts against the inner wall of the housing 1 along the length direction of the housing 1, only the lower side of the electrode assembly 2 in the area where the explosion-proof valve 3 is located can vent to the explosion-proof valve 3. To ensure that the entire electrode assembly 2 can vent to the explosion-proof valve 3, this embodiment provides a first groove 12 on the inner wall of the side where the mounting hole 11 is located, and the first groove 12 extends through both sides of the mounting hole 11 along the length direction of the housing 1, that is, the mounting hole 11 and the first groove 12 are connected, so that an exhaust space is formed between the electrode assembly 2 and the inner wall of the side where the mounting hole 11 is located, and the contact area between the electrode assembly 2 and the side of the housing 1 is reduced. In this way, the first groove 12, the mounting hole 11 and the explosion-proof valve 3 form an exhaust channel for venting the high-temperature gas generated by the electrode assembly 2 when the battery is thermally runaway, which improves the stability of the internal exhaust of the cell and enhances the safety performance of the cell.

[0034] Furthermore, since the exhaust channel formed by the first groove 12 and the mounting hole 11 can discharge high-temperature gas in a timely manner, this embodiment can omit the side plate additionally provided between the housing 1 and the pole group 2, simplifying the assembly process.

[0035] Specifically, one first groove 12 can be provided, which extends through the side of the housing 1 along its length and communicates with the mounting hole 11. Multiple first grooves 12 can also be provided, extending through the side of the housing 1 along its length and communicating with the mounting hole 11. To increase the exhaust area of ​​the first groove 12, this embodiment provides only one first groove 12.

[0036] Meanwhile, the first groove 12 can be a strip groove, an arc groove, or a trapezoidal groove, without any specific limitation.

[0037] The housing 1 provided by this utility model has a first groove 12 provided on the inner wall of the side where the mounting hole 11 is located. The first groove 12 is provided through the length of the housing 1, so that the explosion-proof valve 3 is connected to the first groove 12 to form an exhaust channel. This channel is used to discharge the high-temperature gas of the electrode group 2 to the explosion-proof valve 3 in a timely manner, and then discharge it out of the housing 1 through the explosion-proof valve 3. This improves the stability of the exhaust inside the battery cell and enhances the safety performance of the battery cell. Furthermore, since the side of the electrode group 2 facing the housing 1 is not evenly attached to the inner wall of the housing 1, there is no need to set a side plate to support the electrode group 2, which simplifies the manufacturing and assembly process.

[0038] like Figure 1 and Figure 2 As shown, the housing 1 in this embodiment is also provided with a second groove 13.

[0039] The second groove 13 is located at the bottom of the first groove 12. The second groove 13 extends through the length of the housing 1 and forms an exhaust channel with the first groove 12 and the explosion-proof valve 3.

[0040] Understandably, to further enhance the exhaust effect of the exhaust channel, this embodiment provides a second groove 13 at the bottom of the first groove 12. The opening of the second groove 13 communicates with the bottom of the first groove 12, forming a three-dimensional exhaust channel along the height direction of the housing 1. When the electrode assembly 2 is pressed against the inner wall of the side of the housing 1, the first groove 12 and the second groove 13 are connected and both communicate with the mounting hole 11. When the battery fails due to thermal failure, the high-temperature gas emitted by the electrode assembly 2 enters the first groove 12 and the second groove 13, and converges along the length direction of the housing 1 towards the mounting hole 11, and is discharged from the housing 1 through the explosion-proof valve 3.

[0041] The second groove 13 serves as a supplementary structure to the exhaust function of the first groove 12. It can increase the volume of the exhaust channel, making the high-temperature exhaust smoother. Furthermore, since the first groove 12 and the second groove 13 are arranged in a gradient along the height direction of the housing 1, even if the high-temperature gas of the electrode group 2 causes the insulating film to soften and deform, blocking the first groove 12, the second groove 13 can still provide an exhaust channel, thus ensuring the safety and reliability of the exhaust channel.

[0042] Optionally, the second groove 13 can be a strip groove, an arc groove, or a trapezoidal groove, and the number of the second groove 13 can be set to one or more.

[0043] like Figure 1 and Figure 2 As shown, this embodiment has multiple second grooves 13, which are arranged side by side at intervals.

[0044] Understandably, since the second groove 13 is located at the bottom of the first groove 12, the width of the second groove 13 needs to be smaller than the width of the first groove 12. To ensure the smooth exhaust of the second groove 13, this embodiment provides multiple second grooves 13. The multiple second grooves 13 are spaced apart and extend along the length of the housing 1. The high-temperature exhaust from the electrode assembly 2 can enter the multiple second grooves 13 through the first groove 12 and converge towards the mounting hole 11 through the multiple second grooves 13. The multiple second grooves 13 increase the volume of the exhaust channel and improve the reliability of the exhaust.

[0045] Optionally, the multiple second grooves 13 can be arranged at uniform intervals or at unequal intervals, with the spacing between the second grooves 13 closer to the mounting hole 11 being smaller than the spacing between the second grooves 13 farther from the mounting hole 11.

[0046] In one example, this embodiment provides a first groove 12 and two second grooves 13, both of which are strip-shaped grooves, and the second grooves 13 are arranged in parallel.

[0047] like Figure 3 and Figure 4 As shown, along the width direction of the housing 1, the width of the first groove 12 in this embodiment is w1, and the width of the inner wall of the side where the mounting hole 11 is located is w. w and w1 satisfy: 0.4≤(w-w1) / w≤0.8.

[0048] Understandably, in this embodiment, (w-w1) / w represents the width of one side of the inner wall of the housing 1 that abuts against the electrode assembly 2, and the housing 1 that abuts against the electrode assembly 2 supports the electrode assembly 2. If the width on one side is too small, the supporting force on the electrode assembly 2 is insufficient, affecting the supporting effect on the electrode assembly 2. If the width on one side is too large, since the width w of the inner wall is a constant value, the width w1 of the first groove 12 is small, and the electrode assembly 2 has a certain degree of flexibility, which may cause the electrode assembly 2 to cover the first groove 12, reducing the exhaust effect of the first groove 12.

[0049] Specifically, (w-w1) / w can be 0.4, 0.6, or 0.8.

[0050] like Figure 3 and Figure 4As shown, the wall thickness of the side where the mounting hole 11 is located in this embodiment is H, and the wall thickness of the side of the housing 1 adjacent to the side where the mounting hole 11 is located is h. H satisfies: 0.8mm≤H≤3mm, h satisfies: 0.3mm≤h≤1.5mm, H>h.

[0051] Understandably, since the side where the mounting hole 11 is located needs to be opened to install the explosion-proof valve 3, and the first groove 12 and the second groove 13 also need to be set, the required dimensions along the height direction of the housing 1 are large, the wall thickness H of the side where the mounting hole 11 is located is thicker, and the side adjacent to the side where the mounting hole 11 is located only needs to cover the housing of the pole group 2, so a thinner wall thickness h can be used.

[0052] Specifically, the wall thickness H of the side where the mounting hole 11 is located can be 0.8mm, 1.9mm, or 3mm. The wall thickness h of the side where the mounting hole 11 is located can be 0.3mm, 0.9mm, or 1.5mm.

[0053] like Figure 3 and Figure 4 As shown, along the height direction of the housing 1, the depth of the first groove 12 in this embodiment is H1, the depth of the second groove 13 is H2, the distance between the bottom of the second groove 13 and the outer wall of the side of the housing 1 is H3, and the wall thickness of the side where the mounting hole 11 is located is H, satisfying: H3≥h; 30%≤(H1+H2) / H≤60%.

[0054] Understandably, by Figure 4 From the relative relationships, we know that H = H1 + H2 + H3. Since setting the first groove 12 and the second groove 13 in the shell 1 will reduce the rigidity and strength of the shell 1, in order to ensure the strength of the side of the shell 1 with the mounting hole 11, the distance H3 between the bottom of the second groove 13 and the outer wall of the side of the shell 1 needs to be greater than the wall thickness h of the side of the shell 1 adjacent to the side where the mounting hole 11 is located. Furthermore, the depth of the first groove 12 and the second groove 13 and the wall thickness relative to the side need to meet certain ranges, which need to meet both the strength requirements of the shell 1 and the venting requirements of the first groove 12 and the second groove 13.

[0055] Specifically, (H1+H2) / H can be 30%, 45%, or 60%.

[0056] like Figure 3 and Figure 4 As shown, along the width direction of the shell 1, the width of the first groove 12 in this embodiment is w1, the width of the second groove 13 is w2, the number of second grooves 13 is n, and w1 and w2 satisfy: 0≤(n*w2) / w1≤100%.

[0057] It is understandable that since the second groove 13 is located at the bottom of the first groove 12, and only the first groove 12 can be provided without the second groove 13, or both the first groove 12 and the second groove 13 can be provided, the number of second grooves 13 provided and the width of the first groove 12 and the second groove 13 need to meet a certain range.

[0058] Specifically, the ratio (n*w2) / w1 can be 0, 50%, or 100%.

[0059] In this embodiment, along the length of the housing 1, the opening of the first groove 12 is flared, and the small end of the flared structure faces the side close to the mounting hole 11.

[0060] Understandably, in order to facilitate the convergence of the high-temperature exhaust gas from electrode assembly 2 towards the mounting hole 11, this embodiment sets the opening of the first groove 12 in the shape of a trumpet, that is, the cross-section of the first groove 12 is trapezoidal. The small end of the trumpet-shaped structure faces the side closer to the mounting hole 11, and the large end of the trumpet-shaped structure faces the side away from the mounting hole 11. This allows the high-temperature exhaust gas from electrode assembly 2 to converge towards the mounting hole 11, and as the flow area decreases, the velocity of the high-temperature gas increases, which is more conducive to the discharge of the high-temperature exhaust gas towards the explosion-proof valve 3. Furthermore, the trumpet-shaped structure has a guiding effect on the high-temperature gas, guiding the flow of the high-temperature exhaust gas towards the explosion-proof valve 3.

[0061] In this embodiment, the opening of the second groove 13 is flared, with the small end of the flared structure facing the side close to the mounting hole 11.

[0062] Understandably, in order to facilitate the convergence of the high-temperature exhaust gas from electrode assembly 2 towards the mounting hole 11, this embodiment sets the opening of the second groove 13 in a trumpet shape, that is, the cross-section of the second groove 13 is trapezoidal. The small end of the trumpet-shaped structure faces the side closer to the mounting hole 11, and the large end of the trumpet-shaped structure faces the side away from the mounting hole 11. This allows the high-temperature exhaust gas from electrode assembly 2 to converge towards the mounting hole 11, and as the flow area decreases, the velocity of the high-temperature gas increases, which is more conducive to the discharge of the high-temperature exhaust gas towards the explosion-proof valve 3. Furthermore, the trumpet-shaped structure has a guiding effect on the high-temperature gas, guiding the flow of the high-temperature exhaust gas towards the explosion-proof valve 3.

[0063] like Figure 1 and Figure 2 As shown, the opening ends of the first groove 12 and the second groove 13 in this embodiment are both chamfered.

[0064] Understandably, in order to ensure that the electrode assembly 2 is not scratched by the edges of the first groove 12 and the second groove 13 when it is installed with the housing 1, this embodiment provides chamfers at the groove openings of the first groove 12 and the second groove 13, so that the groove openings of the first groove 12 and the second groove 13 can be smoothly connected.

[0065] Specifically, a chamfer can be a right-angle chamfer or a rounded chamfer.

[0066] like Figure 3 and Figure 4 As shown, in this embodiment, the thickness of the side of the housing 1 with the mounting hole 11 is greater than the thickness of the other sides of the housing 1.

[0067] Understandably, since the side with mounting hole 11 needs to have mounting hole 11, first groove 12 and second groove 13, the remaining sides of housing 1 are only used to form the receiving cavity for covering electrode assembly 2. In order to meet strength requirements and save materials, the various sides of housing 1 in this embodiment are set with unequal wall thicknesses. The wall thickness of the side with mounting hole 11 is greater than the wall thickness of the other sides.

[0068] Secondly, such as Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, this embodiment provides a battery, including: a casing 1, an electrode group 2, an explosion-proof valve 3, and a top cover 4.

[0069] The housing 1 is as described above; the pole assembly 2 is disposed in the receiving cavity and abuts against the inner wall of the side of the housing 1 with the mounting hole 11; the explosion-proof valve 3 is embedded in the mounting hole 11; and the top cover 4 is placed on the opening end of the receiving cavity.

[0070] Specifically, since the battery includes a casing 1, and the specific structure of the casing 1 is as described in the above embodiments, the battery shown in this embodiment includes all the technical solutions of the above embodiments. Therefore, it has at least all the beneficial effects achieved by all the technical solutions of the above embodiments, which will not be described in detail here.

[0071] It is understood that there are two top covers 4 in this embodiment, namely a positive top cover and a negative top cover, which are respectively covered at both ends of the housing 1.

[0072] Since the explosion-proof valve 3 is typically placed on the lower side of the battery, it vents air outwards towards the lower part of the housing 1. The electrode assembly 2 and the electrolyte are both pressed against the side of the housing 1 with the mounting hole 11. In this embodiment, the side of the housing 1 with the mounting hole 11 has a first groove 12 and a second groove 13. The first groove 12, the second groove 13, and the explosion-proof valve 3 communicate to form an exhaust channel for the release of high-temperature gases during thermal runaway, allowing the explosion-proof valve 3 to open promptly and ensuring the safety and reliability of the battery.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A casing for use in a battery, characterized in that, The housing has a receiving cavity, and one side of the housing in the height direction has a mounting hole for installing an explosion-proof valve. The inner wall of the side where the mounting hole is located is provided with a first groove, which is provided through the length direction of the housing and communicates with the explosion-proof valve to form an exhaust channel.

2. The housing according to claim 1, characterized in that, The housing is also provided with a second groove; The second groove is located at the bottom of the first groove and extends through the length of the housing. The second groove, together with the first groove and the explosion-proof valve, forms the exhaust channel.

3. The housing according to claim 2, characterized in that, The second groove is provided in multiple ways, and the multiple second grooves are arranged side by side at intervals.

4. The housing according to claim 1, characterized in that, Along the width direction of the housing, the width of the first groove is w1, and the width of the inner wall of the side where the mounting hole is located is w. w and w1 satisfy: 0.4≤(w-w1) / w≤0.

8.

5. The housing according to claim 2, characterized in that, The wall thickness of the side where the mounting hole is located is H, and the wall thickness of the side of the housing adjacent to the side where the mounting hole is located is h. H satisfies: 0.8mm≤H≤3mm, h satisfies: 0.3mm≤h≤1.5mm, and H>h.

6. The housing according to claim 5, characterized in that, Along the height direction of the housing, the depth of the first groove is H1, the depth of the second groove is H2, the distance between the bottom of the second groove and the outer wall of the side of the housing is H3, and the wall thickness of the side where the mounting hole is located is H, satisfying: H3≥h; 30%≤(H1+H2) / H≤60%.

7. The housing according to claim 3, characterized in that, Along the width direction of the shell, the width of the first groove is w1, the width of the second groove is w2, and the number of the second grooves is n. w1 and w2 satisfy: 0≤(n*w2) / w1≤100%.

8. The housing according to claim 3, characterized in that, Along the length of the housing, the opening of the first groove is funnel-shaped, with the small end of the funnel-shaped structure facing the side closer to the mounting hole; And / or, the opening of the second groove is flared, with the smaller end of the flared structure facing the side closest to the mounting hole.

9. The housing according to claim 3, characterized in that, Both the opening ends of the first groove and the second groove are chamfered; And / or, the thickness of the side of the housing having the mounting hole is greater than the thickness of the other sides of the housing.

10. A battery, characterized in that, include: A housing, the housing as described in any one of claims 1 to 9; The electrode assembly is disposed within the receiving cavity and abuts against the inner wall of the side of the housing with the mounting hole; An explosion-proof valve, wherein the explosion-proof valve is embedded in the mounting hole; A top cover is provided at the opening end of the receiving cavity.

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