Battery shell and battery

Abstract

The invention relates to the technical field of batteries, in particular to a battery shell and a battery. The invention aims to solve the problems that the binding force between the existing battery shell and the plastic frame is poor and the sealing effect is not ideal during injection molding. In order to achieve the purpose, the battery shell comprises a bottom wall, a side wall arranged around the bottom wall and a connecting part arranged on the side wall and extending towards the outside of the battery shell, and in the first direction, the connecting part inclines towards the bottom wall. The connecting part of the battery shell is inclined towards the bottom wall, so that the binding force and the sealing effect between the plastic frame and the battery shell can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a battery housing and a battery. Background Art

[0002] A battery is an important device for storing and releasing electric power and is widely used in various fields such as electronic devices and electric vehicles. A battery usually consists of a housing assembly and an electrode core. The housing assembly is formed by mating two battery housings to form the outer shell of the battery, which has the function of protecting the electrode core. The electrode core is the core part of the battery, which is composed of a positive electrode material, a negative electrode material, an electrolyte, etc., and is responsible for storing and releasing electric energy.

[0003] Currently, welding and sealing methods are generally used to achieve the connection and sealing of the housing assembly. For example, laser welding is used at the connection of two battery housings to achieve the connection and sealing of the housing assembly. However, during the laser welding process, due to changes in process parameters such as laser power, welding speed, and assembly gap, problems such as poor welding often occur, thereby affecting the stability of the connection of the housing assembly and the sealing effect. In order to improve the structural stability and sealing effect of the housing assembly, injection molding can be used to connect and seal the two battery housings. Specifically, first, the flanges of the battery housings are fitted together, and then a plastic frame covering the flanges is injection molded on the flanges to achieve the connection, fixation, and sealing of the connection of the battery housings. However, the flanges of existing battery housings are usually smooth planes. When a plastic frame is injection molded on the flanges, the bonding force between the flange and the plastic frame is weak and the sealing effect is poor, affecting the stability and sealing effect of the battery structure.

[0004] Correspondingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] In order to solve at least one of the above problems in the prior art, that is, to solve the problem that the bonding force between the connecting part of the existing battery housing and the plastic frame is poor and the sealing effect is not ideal.

[0006] The present application provides a battery housing, including a bottom wall, a side wall disposed around the bottom wall, and a connecting part disposed on the side wall and extending towards the outside of the battery housing. In a first direction, the connecting part inclines towards the bottom wall.

[0007] In a preferred technical solution of the above battery housing, the included angle θ between the inclined part of the connecting part and the side wall ranges from 15° to 85°.

[0008] In a preferred technical solution of the above battery housing, the connecting part is provided with through holes.

[0009] In a preferred technical solution of the above battery housing, the surface of the connecting part is provided with a groove disposed around the side wall.

[0010] In the preferred technical solution of the above battery housing, a plurality of grooves are provided and arranged at intervals.

[0011] In the preferred technical solution of the above battery housing, the groove includes a first groove and a second groove arranged outside the first groove, and the depth of the second groove is greater than the depth of the first groove.

[0012] In the preferred technical solution of the above battery housing, the ratio range of the width of the groove area to the width of the connecting portion is any value from 40% to 100%.

[0013] This application also provides a battery, which includes a housing assembly and a plastic frame. The housing assembly includes a first battery housing and a second battery housing. The first battery housing and the second battery housing are the above-mentioned battery housings. The plastic frame is arranged around the housing assembly, and the plastic frame covers the outer end surfaces of the connecting portions of the first battery housing and the second battery housing, and part of the plastic frame is between the connecting portion of the first battery housing and the connecting portion of the second battery housing.

[0014] In the preferred technical solution of the above battery, the housing assembly further includes a partition plate arranged between the first battery housing and the second battery housing, and part of the plastic frame is between the connecting portion of the first battery housing and the partition plate and between the connecting portion of the second battery housing and the partition plate.

[0015] In the preferred technical solution of the above battery, the size of the battery in the first direction is any value from 20 mm to 200 mm, the size in the second direction is any value from 200 mm to 900 mm, and the size in the third direction is any value from 20.1 mm to 1800.1 mm.

[0016] Those skilled in the art can understand that by inclining the connecting portion of the battery housing towards the bottom wall, the bonding force and sealing effect between the plastic frame and the battery housing can be improved, and the problem of the plastic frame falling off during the use of the battery can be avoided.

[0017] Furthermore, by limiting the angle between the connecting portion and the side wall, the setting method of the connecting portion is made more reasonable, preventing the insufficient bonding force between the connecting portion and the plastic frame caused by too large an angle between the connecting portion and the side wall, and at the same time preventing the poor sealing effect and the interference between the free end of the connecting portion and the pole column caused by too small an angle between the connecting portion and the side wall. The setting of the above angle range can further improve the bonding force and sealing effect between the plastic frame and the connecting portion.

[0018] Furthermore, by providing through holes in the connecting portion, part of the plastic frame can be filled into the through holes, increasing the contact area between the plastic frame and the connecting portion, thereby improving the bonding strength between the plastic frame and the connecting portion and avoiding the problem of the plastic frame falling off during battery use.

[0019] Furthermore, by providing grooves around the side walls on the connecting portion, part of the plastic frame can be filled into the grooves, increasing the contact area between the plastic frame and the connecting portion, thereby improving the bonding strength and sealing effect between the plastic frame and the connecting portion and avoiding the problem of the plastic frame falling off during battery use.

[0020] Still further, by providing a plurality of grooves on the connecting portion, part of the plastic frame can be filled into the grooves, increasing the contact area between the plastic frame and the connecting portion, thereby improving the bonding strength and sealing effect between the plastic frame and the connecting portion and avoiding the problem of the plastic frame falling off during battery use.

[0021] Still further, by limiting the depth of the second groove to be greater than the depth of the first groove, the situation where the first groove cannot be filled with molten plastic can be avoided, thereby improving the bonding strength and sealing effect between the plastic frame and the connecting portion.

[0022] Still further, by limiting the ratio of the width of the groove area to the width of the connecting portion, the connection reliability between the plastic frame and the connecting portion can be improved, which is beneficial to avoiding the situation of the plastic frame falling off during battery use and improving the safety and reliability of the battery.

[0023] Those skilled in the art can understand that the connecting portions of the first battery housing and the second battery housing in the battery of the present application are inclined. On the one hand, a gap can be formed between the two connecting portions, and part of the plastic frame is filled in the gap, which can improve the sealing effect between the two housings. On the other hand, the bonding strength between the first battery housing and the second battery housing and the plastic frame can be improved, avoiding the occurrence of situations such as the plastic frame shaking or falling off relative to the first battery housing and the second battery housing during battery use.

[0024] Furthermore, by providing a partition between the two housings, there are gaps between the partition and the connecting portions of the two housings respectively, and part of the plastic frame is filled in the gaps, which can increase the contact area between the plastic frame and the housing assembly, thereby improving the bonding strength and sealing effect between the plastic frame and the housing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, in which:

[0026] Figure 1 is a schematic structural view of the battery of the present invention;

[0027] Figure 2 is an explosion schematic diagram of the battery of the present invention;

[0028] Figure 3 is a plan schematic diagram of the battery of the present invention;

[0029] Figure 4 is Figure 3 a cross-sectional view of the first embodiment at A-A in

[0030] Figure 5 is a structural schematic diagram of the first embodiment of the battery of the present invention;

[0031] Figure 6 is Figure 3 a sectional view of the second embodiment at A-A in

[0032] Figure 7 is Figure 3 a cross-sectional view of the third embodiment at A-A in

[0033] Figure 8 is Figure 7 an enlarged view at A in

[0034] Figure 9 is a structural diagram of the second embodiment of the battery housing of the present invention;

[0035] Figure 10 is a structural schematic diagram of the first embodiment of the connecting portion of the present invention;

[0036] Figure 11 is a structural schematic diagram of the second embodiment of the connecting portion of the present invention;

[0037] Figure 12 is a structural schematic diagram of the third embodiment of the connecting portion of the present invention.

[0038] The reference numerals are as follows:

[0039] 1. Housing assembly; 11. First battery housing; 12. Second battery housing; 13. Partition; 14. Connecting portion; 15. Side wall; 16. Bottom wall; 17. Groove; 18. Through hole; 2. Plastic frame. Specific embodiments

[0040] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application.

[0041] It should be noted that in the description of this application, the terms indicating directions or positional relationships such as "upper", "lower", "inner", "bottom", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application.

[0042] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "arranged" and "connected" 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, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] Refer to Figures 1-12 , and the battery housing of this application will be introduced.

[0044] The battery includes a housing assembly 1 and a plastic frame 2. The housing assembly 1 includes a first battery housing 11 and a second battery housing 12. Connection portions 14 are provided on both the first battery housing 11 and the second battery housing 12. The plastic frame 2 is wrapped around the outer end faces of the connection portions 14 of the two housings. However, the bonding force between the plastic frame 2 and the battery housing is weak and the sealing effect is not ideal. In order to solve the problem of how to improve the bonding force and sealing effect between the battery housing and the plastic frame 2. The battery housing of this application includes a bottom wall 16, a side wall 15 arranged around the bottom wall 16, and a connection portion 14 provided on the side wall 15 and extending towards the outside of the battery housing. In a first direction, the connection portion 14 is inclined towards the bottom wall 16.

[0045] In this application, by inclining the connection portion 14 of the battery housing towards the bottom wall 16, there is a gap between this battery housing and another battery housing arranged opposite to it. On the one hand, a gap can be formed between the two connection portions, and a part of the plastic frame 2 is filled in the gap, which can improve the sealing effect between the two housings. On the other hand, it can improve the bonding force between the first battery housing 11 and the second battery housing 12 and the plastic frame 2, and avoid the occurrence of situations such as the plastic frame 2 shaking or falling off relative to the first battery housing 11 and the second battery housing 12 during the use of the battery.

[0046] Next, further refer to Figures 1-12, a preferred embodiment of the battery housing of the present application will be introduced. Those skilled in the art can understand that the embodiments introduced below are only used to illustrate the principle of the present application and are not intended to limit the protection scope of the present application. On the premise that the battery housing includes at least a bottom wall 16, a side wall 15, and a connecting portion 14, those skilled in the art can adjust the following setting methods so that the present application can be applied to more specific application scenarios.

[0047] See Figures 1-12 , the battery housing includes a bottom wall 16, a side wall 15 disposed around the bottom wall 16, and a connecting portion 14 disposed on the side wall 15 and extending toward the outside of the battery housing. The bottom wall 16 and the side wall 15 enclose a first accommodation cavity. The connecting portion 14 is disposed in a circle along the circumference of the side wall 15, and at least a part of the connecting portion 14 is inclined toward the bottom wall 16.

[0048] Among them, as Figure 4 shown, the included angle θ between the connecting portion 14 and the side wall 15 ranges from 15° to 85°. For example, the included angle between the connecting portion 14 and the side wall 15 can be 15°, 20°, 30°, 50°, or 85°. This can prevent the insufficient bonding force between the connecting portion and the plastic frame caused by too large an included angle between the connecting portion and the side wall, and at the same time can prevent the poor sealing effect caused by too small an included angle between the connecting portion and the side wall and the interference between the free end of the connecting portion and the pole column. The setting of the above included angle range can further improve the bonding force and sealing effect between the plastic frame and the connecting portion.

[0049] Of course, the inclination mode of the connecting portion 14 of the present application is not fixed, and those skilled in the art can adjust it according to needs. For example, a part of the connecting portion 14 is inclined toward the bottom wall 16. When the connecting portion 14 is inclined toward the bottom wall 16, the included angle between the inclined portion of the connecting portion 14 and the side wall 15 ranges from 15° to 85°.

[0050] In addition, the present application does not limit the connection manner of the side wall 15, the bottom wall 16, and the connecting portion 14, as long as the side wall 15, the bottom wall 16, and the connecting portion 14 are connected to form a battery housing. For example, the side wall 15, the bottom wall 16, and the connecting portion 14 are integrally formed. In addition, the present application does not limit the materials and thicknesses of the side wall 15, the bottom wall 16, and the connecting portion 14, as long as the battery housing has good sealing performance. For example, the materials of the side wall 15, the bottom wall 16, and the connecting portion 14 can be aluminum alloy, and / or the material of the plastic frame 2 can be plastic, and / or the thicknesses are all 0.3 mm.

[0051] Next, see Figures 5-12 to introduce the connecting portion 14 of the present application.

[0052] In one embodiment, see Figures 5-6, a plurality of through holes 18 are formed in the connecting portion 14, and the plurality of through holes 18 are circumferentially spaced apart along the connecting portion 14. Among them, the through holes 18 include a plurality of oblong holes and a plurality of square holes. The oblong holes are arranged close to the housing, and the square holes are arranged away from the side wall 15 and penetrate through the edge of the connecting portion 14 to form a square notch. The plurality of oblong holes and the plurality of square holes are both circumferentially spaced apart along the connecting portion 14. A part of the plastic frame 2 can be filled into the through holes 18, so as to improve the bonding force between the plastic frame 2 and the connecting portion 14, and further improve the connection stability between the plastic frame 2 and the housing.

[0053] Of course, the shape of the through holes 18 provided in the present application is not fixed, and those skilled in the art can adjust it according to needs. For example, the square hole forms a square notch through the edge of the connecting portion 14, or the through hole 18 can also be a circular hole and a triangular hole. In addition, the type and quantity of the through holes 18 in the present application are not fixed, and those skilled in the art can adjust them according to the setting needs. For example, the number of types of the shape of the through holes 18 can also be 1, 3 or other quantities. When the number of types of the shape of the through holes 18 is 1, the through hole 18 can be an oblong hole, a square hole or a circular hole. The plurality of through holes 18 can be divided into one or other numbers of through hole groups, and the plurality of through holes 18 in each through hole group can be circumferentially spaced apart along the connecting portion 14, and the plurality of through hole groups are spaced apart along the width direction of the connecting portion 14. When the number of types of the shape of the through holes 18 is 3, the through holes 18 include a plurality of oblong holes, a plurality of square holes and a plurality of circular holes. The three types of through holes 18 are spaced apart along the width direction of the connecting portion 14, and the plurality of oblong holes, the plurality of square holes and the plurality of circular holes are all circumferentially spaced apart along the connecting portion 14.

[0054] In addition, the arrangement form of the oblong holes and the square holes in the present application is not fixed, and those skilled in the art can adjust it according to needs. The plurality of oblong holes and the plurality of square holes can be arranged alternately along the circumference of the connecting portion 14.

[0055] In another embodiment, see Figures 7-12 , a plurality of grooves 17 are provided on one surface of the connecting portion 14. The plurality of grooves 17 surround the side wall 15 and communicate to form an annular structure. A part of the plastic frame 2 can be filled into the grooves 17, so as to improve the bonding force between the plastic frame 2 and the connecting portion 14, and further improve the connection stability between the plastic frame 2 and the housing.

[0056] Of course, the setting position of the grooves 17 in the present application is not fixed, and those skilled in the art can adjust it according to needs. For example, grooves 17 are provided on both surfaces of the connecting portion 14. In addition, the setting form of the grooves 17 in the present application is not fixed, and those skilled in the art can adjust it according to needs. For example, the plurality of grooves 17 can also be spaced apart around the side wall 15.

[0057] It should be noted that the present application places no restrictions on the shape of the annular structure, as long as the groove 17 can form an annulus along the circumferential direction of the connecting portion 14. For example, the shape of the annular structure can be regular or irregular. Taking the shape of the annular structure as a rectangle, the four corners of the rectangle can be rounded or right-angled.

[0058] Next, referring to Figure 7 、 8 and 10, a plurality of grooves 17 are further provided on the connecting portion 14 and are sequentially spaced apart in a direction away from the side wall 15. Specifically, the distance between adjacent groups of grooves 17, that is, the groove pitch d1, is any value in the range of 30 μm - 300 μm. For example, the groove pitch d1 can be 30 μm, 50 μm, 100 μm, 200 μm, or 300 μm. Preferably, the groove pitch d1 is any value in the range of 100 μm - 200 μm. It should be noted that the groove pitch d1 between two adjacent grooves 17 is the distance between the center lines of two adjacent grooves 17 in the width direction ( Figures 10-12 the left-right direction in Figures 10-12 as shown by d1 in

[0059] The width d2 of the groove 17 is any value in the range of 20 μm - 200 μm. For example, the width d2 can be 20 μm, 50 μm, 100 μm, 150 μm, or 200 μm. Preferably, the width d2 is any value in the range of 50 μm - 120 μm. The dimension of the groove 17 in the first direction, that is, the depth h, is any value in the range of 10 μm - 290 μm. For example, the depth h can be 10 μm, 50 μm, 100 μm, 150 μm, 200 μm, or 290 μm. Preferably, the depth h is any value in the range of 50 μm - 150 μm. By setting the groove width parameter, the molten plastic can flow into the groove 17 quickly, meeting the efficiency requirements of injection molding processing. At the same time, by setting the groove depth parameter, the plastic frame 2 and the connecting portion 14 can be firmly connected, and it can prevent the excessive groove depth from affecting the structural strength of the connecting portion, and can also prevent the insufficient groove depth from resulting in insufficient bonding strength between the plastic frame 2 and the connecting portion 14 and unsatisfactory sealing effect.

[0060] Preferably, referring to Figure 11 and 12 , the depth of some of the grooves 17 near the side wall 15 is less than the depth of some of the grooves 17 away from the side wall 15.

[0061] Specifically, referring to Figure 11, the plurality of grooves 17 may be composed of a plurality of shallow grooves and a plurality of deep grooves. The shallow grooves are arranged close to the housing, and the deep grooves are arranged away from the housing. The depth of the shallow grooves is less than that of the deep grooves. Among them, the dimension of the shallow groove in the first direction, that is, the depth h1, is any value from 20 μm to 40 μm. For example, the depth h1 can be 20 μm, 30 μm, or 40 μm. The dimension of the deep groove in the first direction, that is, the depth h2, is any value from 100 μm to 120 μm. For example, the depth h2 can be 100 μm, 110 μm, or 120 μm.

[0062] Alternatively, referring to Figure 12 , the plurality of grooves 17 are composed of a plurality of first grooves, a plurality of second grooves, and a plurality of third grooves. The first grooves are arranged close to the side wall 15, the third grooves are arranged away from the side wall 15, and the second grooves are located between the first grooves and the third grooves. The dimension of the first groove in the first direction is less than that of the second groove in the first direction, and the dimension of the second groove in the first direction is less than that of the third groove in the first direction. Among them, the dimension of the first groove in the first direction, that is, the depth h1, is any value from 20 μm to 40 μm. For example, the depth h1 can be 20 μm, 30 μm, or 40 μm. The dimension of the second groove in the first direction, that is, the depth h2, is any value from 60 μm to 80 μm. For example, the depth h2 can be 60 μm, 70 μm, or 80 μm. The dimension of the third groove in the first direction, that is, the depth h3, is any value from 100 μm to 120 μm, and the depth h3 can be 100 μm, 110 μm, or 120 μm.

[0063] Preferably, the ratio of the width of the region where the groove 17 is provided on the connecting portion 14 to the width of the connecting portion 14 ranges from 40% to 100%.

[0064] Among them, the ratio of the width of the region where the groove 17 is provided on the surface of the connecting portion 14 to the width of the surface can be 40%, 50%, 60%, 70%, 80%, 90%, or 100%. Preferably, the ratio of the width of the region where the groove 17 is provided on the surface of the connecting portion 14 to the width of the surface ranges from 70% to 100%.

[0065] Exemplarily, as Figure 8 shown, the dimension of the lower surface of the connecting portion 14 in the width direction is L1, the dimension of the region where the groove 17 is provided on the lower surface of the connecting portion 14 in the width direction is L0, and the groove 17 on the lower surface of the connecting portion 14 extends along the second direction and penetrates the connecting portion 14, that is, the dimension of the lower surface of the connecting portion 14 in the width direction is equal to the dimension of the region where the groove 17 is provided in the width direction. Therefore, the ratio = 100%×(L0 / L1). For example, if L0 = 3.0 mm and L1 = 4.0 mm, then the ratio = 100%×(3 / 4) = 75%.

[0066] Next, the battery of the present application will be introduced.

[0067] The present application provides a battery, which includes a housing assembly 1 and a plastic frame 2. The housing assembly 1 includes a first battery housing 11 and a second battery housing 12. The first battery housing 11 and the second battery housing 12 are battery housings in any of the above embodiments. The plastic frame 2 is disposed around the housing assembly 1. The plastic frame 2 is coated on the outer end surfaces of the connecting portions 14 of the first battery housing 11 and the second battery housing 12, and a part of the plastic frame 2 is filled between the connecting portions 14 of the first battery housing 11 and the second battery housing 12.

[0068] In the battery of the present application, the connecting portions 14 of the first battery housing 11 and the second battery housing 12 are inclined, so that there is a gap between the two connecting portions 14. A part of the plastic frame 2 is filled in the gap, which can improve the bonding force and sealing effect between the two housings and avoid the problem of the plastic frame 2 falling off during the use of the battery.

[0069] Among them, the battery housing is as above and will not be elaborated here.

[0070] See Figures 1-7 , the battery includes a housing assembly 1 and a plastic frame 2. Among them, the housing assembly 1 includes a first battery housing 11, a separator 13 and a second battery housing 12 arranged in the first direction. The first battery housing 11 and the second battery housing 12 have the same structure and are both battery housings, and they are symmetrically arranged in the first direction. There are gaps between the inclined portions of the connecting portions 14 on the two battery housings and the separator 13. The plastic frame 2 is arranged in a circle along the circumferential direction of the housing, and is coated on the end surfaces of the connecting portions 14 of the two housings and filled into the gaps. During the processing, the assembled battery is first placed into an injection mold, and then molten plastic is injected into the injection mold. The molten plastic can flow into the gaps, so that after the plastic cools, it can not only form a circle along the circumferential direction of the housing and be coated on the connecting portions 14 of the two housings, but also fill into the gaps to form the plastic frame 2.

[0071] Preferably, the size of the battery in the first direction (such as Figure 1 shown in the Z direction) is any value in 20 mm - 200 mm. For example, the size of the battery in the first direction can be 20 mm, 50 mm, 100 mm, 150 mm or 200 mm. The size of the battery in the second direction (such as Figure 1 shown in the X direction) is any value in 200 mm - 900 mm. For example, the size of the battery in the second direction can be 20 mm, 300 mm, 400 mm, 500 mm, 600 mm, 700 mm, 800 mm or 900 mm. In the third direction (such as Figure 1The dimension in the Y direction (shown) is any value between 20.1 mm and 1800.1 mm. For example, the dimension of the battery in the third direction can be 20.1 mm, 100 mm, 500 mm, 1000 mm, 1500 mm, or 1800.1 mm. The widths of the connecting portions 14 are all 1 - 10 mm, for example, the widths are 1 mm, 5 mm, or 10 mm. The setting of the above parameters can, on the one hand, prevent the production difficulty from being high and the energy density from being low due to the too small size of the battery, and on the other hand, prevent the stability of the battery structure from being poor and the cost from being too high due to the too large size of the battery, and thus can effectively meet the requirements of the above structure.

[0072] Among them, the dimensions of the battery housing in the second direction and the third direction both include the dimensions of the plastic frame 2 in the second direction and the third direction, that is, as Figure 1 shown, the dimension of the battery housing in the second direction is equal to the dimension between the outer sides of the plastic frames 2 on both sides of the housing in the second direction, and the dimension of the battery housing in the third direction is equal to the dimension between the outer sides of the plastic frames 2 on both sides of the housing in the third direction.

[0073] In addition, when through holes 18 are provided on the connecting portion 14, the through holes 18 on the first battery housing 11 and the through holes 18 on the second battery housing 12 can be vertically aligned and communicated, or there can be no corresponding relationship and they are not communicated with each other.

[0074] Those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.

[0075] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present application.

Claims

1. A battery housing, characterized in that, It includes a bottom wall, a side wall disposed around the bottom wall, and a connecting portion disposed on the side wall and extending towards the outside of the battery housing. In a first direction, the connecting portion is inclined towards the bottom wall.

2. The battery housing according to claim 1, characterized in that, The included angle θ between the inclined portion of the connecting portion and the side wall ranges from 15° to 85°.

3. The battery housing according to claim 1, characterized in that, The connecting portion is provided with a through hole.

4. The battery housing according to claim 1, characterized in that, The surface of the connecting portion is provided with a groove disposed around the side wall.

5. The battery housing according to claim 4, characterized in that, There are multiple grooves and they are spaced apart.

6. The battery housing according to claim 5, characterized in that, The groove includes a first groove and a second groove disposed outside the first groove, and the depth of the second groove is greater than the depth of the first groove.

7. The battery housing according to claim 4, characterized in that, The ratio of the width of the groove area to the width of the connecting portion ranges from 40% to any value within 100%.

8. A battery, characterized in that, The battery includes a housing assembly and a plastic frame. The housing assembly includes a first battery housing and a second battery housing. The first battery housing and the second battery housing are the battery housings described in any one of claims 1-7. The plastic frame is disposed around the housing assembly. The plastic frame covers the connecting portion of the first battery housing and the outer end surface of the connecting portion of the second battery housing. Part of the plastic frame is between the connecting portion of the first battery housing and the connecting portion of the second battery housing.

9. The battery according to claim 8, characterized in that, The housing assembly further includes a partition disposed between the first battery housing and the second battery housing. Part of the plastic frame is between the connecting portion of the first battery housing and the partition, and between the connecting portion of the second battery housing and the partition.

10. The battery according to claim 9, characterized in that, The size of the battery in the first direction is any value within 20mm - 200mm, the size in the second direction is any value within 200mm - 900mm, and the size in the third direction is any value within 20.1mm - 1800.1mm.

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