Battery shell and battery

Abstract

The utility model relates to the technical field of batteries, particularly provides a battery shell and a battery, and aims to solve the technical problems that the binding force between the conventional battery shell and a plastic frame is poor and the sealing effect is not ideal when the conventional battery shell is sealed by injection molding. In order to achieve the purpose, the battery shell comprises an accommodating part and a connecting part arranged on the accommodating part, and a first groove surrounding the accommodating part is formed in the surface of the connecting part. According to the plastic frame, the first groove is formed in at least one surface of the connecting part, molten plastic can permeate into the first groove in the injection molding sealing process of the connecting part, and therefore the binding force and the sealing effect of the plastic frame and the connecting part can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and specifically provides a battery shell and a battery. Background Art

[0002] New energy vehicles have attracted more and more attention due to their low noise, no pollution, high energy efficiency and other characteristics, thus promoting the accelerated development of new energy vehicles. At present, new energy vehicles usually use batteries as a power source, which provides a broad space for the application and development of lithium-ion batteries.

[0003] Existing batteries usually use laser welding to achieve shell connection and sealing. However, laser welding generally has the problem of low welding yield, resulting in poor sealing of the battery shell. In order to improve the sealing of the battery shell, some batteries use injection molding to seal the battery shell. Specifically, the flanges of the battery shell are first fitted together, and then a plastic frame covering the flange is injection molded on the flange to achieve connection, fixation and sealing of the battery shell connection. However, the surface of the flange is usually a smooth plane. When the plastic frame is directly injection molded on the flange, the bonding force between the flange and the plastic frame is weak and the sealing effect is poor, which affects the stability of the battery structure and the safety of use.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the technical problem that when the connecting part of the existing battery housing is injection-molded to form a plastic frame, the bonding force between the connecting part and the plastic frame is poor and the sealing effect is not ideal.

[0006] In a first aspect, the utility model provides a battery housing, comprising a receiving portion and a connecting portion arranged on the receiving portion, wherein a first groove surrounding the receiving portion is provided on a surface of the connecting portion.

[0007] In the preferred technical solution of the above battery housing, a plurality of first grooves are provided and are respectively arranged at both end surfaces of the connecting portion in the thickness direction.

[0008] In the preferred technical solution of the above battery housing, a plurality of first grooves are provided and distributed at intervals.

[0009] In a preferred technical solution of the above battery housing, the first 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.

[0010] In a preferred technical solution of the above battery housing, the first groove is in a closed ring shape and surrounds the accommodating portion.

[0011] In the preferred technical solution of the above battery shell, the groove width of the first groove is w, wherein 20um≤w≤200um; and / or the groove spacing between two adjacent first grooves is d, wherein 30um≤d≤300um.

[0012] In a second aspect, the utility model also provides a battery, comprising a first battery shell, a second battery shell and a plastic frame, wherein the first battery shell and / or the second battery shell is the battery shell described in any one of the above items, and the plastic frame is covered on the outer end surface of the connecting part of the first battery shell and the connecting part of the second battery shell, and the plastic frame is partially accommodated in the first groove.

[0013] In the preferred technical solution of the above battery shell, the battery also includes a partition arranged between the first battery shell and the second battery shell, and the plastic frame covers the connecting portion of the first battery shell, the edge of the partition and the outer end surface of the connecting portion of the second battery shell.

[0014] In the preferred technical solution of the above-mentioned battery shell, a gap is provided between the connecting portion of the first battery shell and the edge of the partition, and the plastic frame portion is accommodated in the gap; and / or a gap is provided between the connecting portion of the second battery shell and the partition, and the plastic frame portion is accommodated in the gap.

[0015] In the preferred technical solution of the battery housing, a plurality of second grooves are provided on one end surface of the edge of the partition, and the plastic frame is partially received in the second grooves.

[0016] In the case of adopting the above technical solution, the utility model sets a first groove on the surface of the connecting part. During the process of injection molding and sealing the battery shell, the molten plastic will penetrate into the first groove of the connecting part, thereby improving the bonding force and sealing effect between the connecting part and the plastic frame, thereby improving the connection stability between the battery shell and the plastic frame, which is beneficial to avoid the plastic frame from falling off and can effectively prevent leakage.

[0017] Furthermore, the utility model can further improve the connection stability and sealing effect between the plastic frame and the partition by arranging the second groove on the partition.

[0018] Furthermore, the utility model can increase the connection area between the plastic frame and the battery shell by setting a gap between the connection part of the first battery shell and / or the connection part of the second battery shell and the partition, thereby further improving the connection stability between the plastic frame and the battery shell, and can enhance the sealing effect between the battery shell and the plastic frame.

[0019] Furthermore, the utility model can avoid the situation where the first groove close to the accommodating portion cannot be fully filled with injection molding material by making the depth of the first groove close to the accommodating portion smaller than the depth of the first groove far from the accommodating portion, which is beneficial to ensuring the structural strength of the connecting portion.

[0020] Furthermore, the utility model can improve the bonding force between the plastic frame and the battery housing and the sealing effect of the battery housing by making the first groove form a ring along the circumference of the accommodating portion.

[0021] Furthermore, the utility model limits the width and the groove spacing of the first groove, which is not only convenient for processing and manufacturing, but also can improve the bonding force and sealing effect between the plastic frame and the battery housing, thereby preventing the plastic frame from falling off.

[0022] In addition, the battery further provided by the present invention on the basis of the above technical solution includes the above battery housing, and thus has the technical effects possessed by the above battery housing. Compared with the battery before the improvement, the battery of the present invention has better sealing and higher safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0024] Figure 1 It is a schematic diagram of the explosion of the battery of the utility model;

[0025] Figure 2 It is a schematic diagram of the assembly of the battery of the utility model;

[0026] Figure 3 yes Figure 2 A cross-sectional view of the first embodiment at AA;

[0027] Figure 4 yes Figure 2 A cross-sectional view of the second embodiment at AA;

[0028] Figure 5 yes Figure 4 A cross-sectional view after removing the plastic frame.

[0029] Figure 6 It is a structural schematic diagram of the first embodiment of the battery housing of the utility model;

[0030] Figure 7 It is a structural schematic diagram of a second embodiment of the battery housing of the utility model;

[0031] Figure 8 It is a structural schematic diagram of a third embodiment of a battery housing of the utility model;

[0032] Fig. 9It is a structural schematic diagram of a first embodiment of the first connecting portion of the utility model;

[0033] Fig.10 It is a structural schematic diagram of the second embodiment of the first connecting part of the utility model.

[0034] List of reference numerals:

[0035] 1. Shell assembly; 11. First battery shell; 12. Second battery shell; 13. Partition plate; 14. Connecting portion; 141. First connecting portion; 15. First groove; 16. Gap; 142. Second connecting portion; 131. Second groove;

[0036] 2. Plastic frame. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0038] It should be noted that in the description of the present invention, the terms "inside", "outside", "upper", "lower", "left", "right" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "connect", and "install" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The utility model provides a novel battery shell, which includes a receiving portion and a connecting portion 14 arranged on the receiving portion, wherein the connecting portion 14 is the above-mentioned flange, and the receiving portion is the middle part of the shell for receiving the battery cell, and a cavity for receiving the battery cell is formed inside the receiving portion.

[0041] See first Figures 1 to 3 ,in, Figure 1 This is a schematic diagram of the explosion of the battery of the utility model. Figure 2 This is a schematic diagram of the assembly of the battery of the utility model. Figure 3 yes Figure 2 Cross-sectional view at AA in the middle.

[0042] like Figures 1 to 3 As shown, the connection part 14 is arranged around the receiving part, that is, the connection part 14 is arranged along the circumference of the receiving part. Preferably, the receiving part usually has an opening for placing or removing the battery cell, and the connection part 14 is formed by extending from the edge of the opening toward a direction away from the receiving part.

[0043] By providing the first groove 15 on the surface of the connecting portion 14 , during the injection molding process, the molten injection slurry will penetrate into the first groove 15 , thereby improving the bonding force and sealing effect between the plastic frame 2 and the connecting portion 14 .

[0044] like Figure 1 As shown, the utility model further provides a battery. The battery of the utility model comprises a shell assembly 1 and a battery cell (not shown) installed in the shell assembly 1 .

[0045] In preferred example 1, Figures 1 to 3 As shown, the housing assembly 1 of the utility model includes a partition 13, in the thickness direction ( Figure 1 and Figure 3 The battery shells are arranged on both sides of the partition 13 in the vertical direction (in the vertical direction), wherein, for the convenience of the following description and understanding, the battery shells located on both sides of the partition 13 are named as the first battery shell 11 and the second battery shell 12, respectively, the connecting portion on the first battery shell 11 is the first connecting portion 141, and the connecting portion on the second battery shell 12 is the second connecting portion 142. The first connecting portion 141, the edge of the partition 13 and the second connecting portion 142 are respectively superimposed on each other.

[0046] The battery cell of the utility model includes a first battery cell and a second battery cell, wherein the first battery cell is contained in a closed first cavity formed between the first battery housing 11 and the partition 13, and the second battery cell is contained in a closed second cavity formed between the second battery housing 12 and the partition 13. In other embodiments, the battery cells can be distributed and arranged as required according to the structure of the housing assembly 1, which will not be described in detail here.

[0047] Furthermore, at least one surface of the first connection portion 141 is provided with a first groove 15 , and at least one surface of the second connection portion 142 is also provided with a first groove 15 .

[0048] like Figures 1 to 3As shown, the battery of the utility model further includes a plastic frame 2, which is coated on the first connecting portion 141, the edge of the partition 13 and the outer end surface of the second connecting portion 142 to achieve the connection and sealing of the first battery housing 11, the partition 13 and the second battery housing 12. The plastic frame 2 is partially received in the first groove 15 of the first connecting portion 141 and the first groove 15 of the second connecting portion 142, wherein the first battery housing 11 and the second battery housing 12 are made of metal, preferably an aluminum shell.

[0049] That is to say, the utility model uses a plastic frame 2 to seal and connect the first battery shell 11, the partition 13 and the second battery shell 12. Compared with the prior art that uses laser welding to seal and connect the first battery shell 11, the partition 13 and the second battery shell 12, the utility model uses injection molding to seal and connect. The plastic frame 2 has a strong bonding force with the first battery shell 11, the partition 13 and the second battery shell 12, good sealing and high yield, and can be injection molded and sealed in large quantities at the same time, with high efficiency and low cost. In addition, the connection between the plastic frame 2 and the first battery shell 11 and the second battery shell 12 can be achieved through physical methods (such as heating, etc.) to achieve non-destructive disassembly, which is convenient for recycling and reuse of the shell assembly 1.

[0050] For example, Figures 1 to 3 As shown, the plastic frame 2 is also arranged along the circumference of the accommodating portion. The plastic frame 2 is made of plastic. During the processing, the assembled battery is first placed in the injection mold, and then the molten plastic is injected into the injection mold. After the plastic is cooled, a circle of plastic frame 2 is formed along the edge of the first battery shell 11, the partition 13 and the circumference of the second battery shell 12.

[0051] For example, Figures 1 to 3 As shown, the first connection part 141 and the second connection part 142 are respectively arranged in a circle along the circumference of the first battery shell 11 and the circumference of the second battery shell 12, the upper surface of the first connection part 141 is provided with a first groove 15, the lower surface of the first connection part 141 is fitted with the top surface of the partition 13, the lower surface of the second connection part 142 is provided with a first groove 15, the upper surface of the second connection part 142 is fitted with the bottom surface of the partition 13, and the plastic frame 2 at least partially covers the first connection part 141 and the second connection part 142, so as to connect, fix and seal the first connection part 141 and the partition 13 as well as the second connection part 142 and the partition 13.

[0052] It should be noted that, in actual application, those skilled in the art may only provide the first groove 15 on the first connection portion 141, or only provide the first groove 15 on the second connection portion 142. Such flexible adjustment and change do not deviate from the principle and scope of the utility model and should be limited within the protection scope of the utility model. Of course, the housing assembly 1 of the utility model preferably provides the first groove 15 on both the first connection portion 141 and the second connection portion 142.

[0053] It should be further explained that, in the thickness direction, the first groove 15 can be arranged on the upper surface of the first connecting part 141, or on the lower surface of the first connecting part 141, or on the upper and lower surfaces of the first connecting part 141 at the same time; similarly, in the thickness direction, the first groove 15 can also be arranged on the upper surface of the second connecting part 142, or on the lower surface of the second connecting part 142, or on the upper and lower surfaces of the second connecting part 142 at the same time.

[0054] In preferred example 2, the shell assembly includes a first battery shell 11 and a second battery shell 12 arranged in the thickness direction, the connecting part of the first battery shell 11 is a first connecting part 141, and the connecting part on the second battery shell 12 is a second connecting part 142. The first connecting part 141 is provided with a first groove 15 on the surface connected to the plastic frame 2 and / or the second connecting part 142 is also provided with a first groove 15 on the surface connected to the plastic frame 2.

[0055] That is, compared with the housing assembly 1 in the preferred example 1, the housing assembly in the preferred example eliminates the partition plate 13 disposed between the first battery housing 11 and the second battery housing 12 .

[0056] It should be noted that, in actual applications, those skilled in the art may set the first groove 15 to be cylindrical, square or strip-shaped, etc. Such adjustment and change to the specific shape of the first groove 15 does not deviate from the principle and scope of the present utility model and should be limited within the protection scope of the present utility model.

[0057] It should be noted that the following description is made by taking the first groove 15 on the first connection portion 141 as an example. Similarly, the first groove 15 on the second connection portion 142 also satisfies the following description.

[0058] It should be noted that, in actual applications, those skilled in the art may extend the first groove 15 along the length direction of the first connecting portion 141, or extend the first groove 15 along the width direction of the first connecting portion 141, or extend the first groove 15 at an angle, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present utility model and should be limited within the protection scope of the present utility model.

[0059] Preferably, if Figures 6 to 8 As shown, the first groove 15 forms a closed ring along the circumference of the first battery housing 11 .

[0060] By making the first groove 15 form a circle along the circumference of the first battery housing 11 to form a closed annular path, the bonding force between the plastic frame 2 and the first battery housing 11 can be improved, and the sealing effect of the first battery housing 11 can be improved.

[0061] In the first preferred case, if Figure 6 As shown, the first groove 15 passes through the first connecting portion 141 along the length direction of the first connecting portion 14 .

[0062] For example, Figure 6 As shown, the first groove 15 on the long side of the first connection part 141 passes through the long side of the first connection part 141 along the length direction of the long side of the first connection part 141, and the first groove 15 on the short side of the first connection part 141 passes through the short side of the first connection part 141 along the length direction of the short side of the first connection part 141. In this way, the two ends of the first groove 15 located on the long side of the first connection part 141 are respectively connected to the first groove 15 on the corresponding short side of the first connection part 141, and the two ends of the first groove 15 located on the short side of the first connection part 141 are respectively connected to the first groove 15 on the corresponding long side of the first connection part 141, so that the first groove 15 forms a ring along the circumference of the shell assembly 1.

[0063] like Figure 6 As shown, in this preferred case, the number of the first grooves 15 is preferably set to multiple, and the multiple first grooves 15 are spaced apart along the width direction of the first connecting portion 141. Each first groove 15 penetrates the first connecting portion 141 along the length direction of the first connecting portion 141. In the four right-angle range areas of the first connecting portion 141, the first grooves 15 on the long side of the first connecting portion 141 intersect with the first grooves 15 on the short side of the first connecting portion 141, and have overlapping areas. The multiple first grooves 15 are preferably distributed at equal intervals.

[0064] In the second preferred case, if Figure 7 As shown, the ring formed by the first grooves 15 is rectangular. That is, the first grooves 15 on the long side of the first connecting portion 141 are connected end to end with the first grooves 15 on the short side of the first connecting portion 141 to form a rectangular closed path.

[0065] like Figure 7As shown, in this preferred case, the number of the first grooves 15 is also preferably set to multiple, and the multiple first grooves 15 are spaced apart along the width direction of the first connecting portion 141. That is, a plurality of rectangular annular grooves are provided on the first connecting portion 141, and the multiple annular grooves are distributed in an array, and the length of the annular grooves gradually increases in the direction away from the first battery housing 11 (i.e., from the inside to the outside). The multiple first grooves 15 are preferably distributed at equal intervals.

[0066] In the third preferred situation, if Figure 8 As shown, the ring formed by the first groove 15 is rectangular, and the four corners of the ring are all set to be rounded.

[0067] By setting the four corners of the ring formed by the first groove 15 to be rounded, it is not only beneficial to the processing of the first groove 15, but also beneficial for the injection material to flow along the first groove 15, so as to completely fill the entire ring-shaped first groove 15.

[0068] Preferably, if Fig. 9 and Fig.10 As shown, the depth of the first groove 15 is any value between 10 um and 290 um.

[0069] For example, those skilled in the art may set the depth of the first groove 15 to 10 um, 50 um, 100 um, 150 um, 200 um, 250 um or 290 um in practical applications.

[0070] It should be noted that the depth of the first groove 15 refers to the dimension of the first groove 15 along the thickness direction of the first connecting portion 141. By limiting the depth of the first groove 15, it is possible to avoid affecting the bonding force between the plastic frame 2 and the first battery housing 11 due to the depth of the first groove 15 being too shallow, and to avoid affecting the structural strength of the first connecting portion 141 due to the depth of the first groove 15 being too deep. The depth of the first groove 15 is further preferably any value between 50um and 150um.

[0071] In the first preferred example, Fig. 9 As shown, the number of the first grooves 15 is set to be multiple, wherein the depths h of the multiple first grooves 15 are the same, and the depth h of the first groove 15 is preferably any value from 10um to 290um, and further preferably any value from 50um to 150um.

[0072] For example, Fig. 9 As shown, the plurality of first grooves 15 are distributed at intervals along a direction away from the first battery housing 11 , and the plurality of first grooves 15 are distributed at equal intervals.

[0073] It should be noted that, in actual applications, those skilled in the art may also distribute the multiple first grooves 15 at intervals along the length direction of the first connecting portion 141. Such flexible adjustment and change does not deviate from the principle and scope of the present utility model and should be limited within the protection scope of the present utility model.

[0074] In the second preferred example, Fig.10 As shown, the number of the first grooves 15 is set to be multiple, and the multiple first grooves 15 are spaced apart in a direction away from the first battery housing 11 , wherein the depth of some of the first grooves 15 close to the first battery housing 11 is less than the depth of some of the first grooves 15 away from the first battery housing 11 .

[0075] That is, when a plurality of first grooves 15 are provided, the depths of the first grooves 15 are not the same, and the first grooves 15 near the first battery housing 11 (from the first battery housing 11 to the second battery housing 11) are not the same. Fig.10 The depth of the first groove 15 is small, and the side away from the first battery housing 11 (from the left side of the first connecting portion 141) is small. Fig.10 The depth of the first groove 15 (on the right side of the first connecting portion 141 when viewed from above) is large. Through such an arrangement, it is possible to avoid the situation where the first groove 15 close to the side of the first battery shell 11 cannot be fully filled with the injection molding material, which is beneficial to ensuring the structural strength of the first connecting portion 141.

[0076] For example, Fig.10 As shown, the plurality of first grooves 15 are composed of a plurality of first grooves and a plurality of second grooves, the first grooves are arranged close to the first battery housing 11, and the second grooves are arranged away from the first battery housing 11, that is, the second grooves are located outside the first grooves, and the outside of the first grooves refers to the side away from the accommodation portion, and the depth of the first grooves is less than the depth of the second grooves. Among them, the first grooves are located on the inner side of the first connecting portion 141 (from Fig.10 The second groove is located on the outer side of the first connecting portion 141 (from the left side of the connecting portion 14). Fig.10 The right side of the connecting portion 14 when viewed from above).

[0077] Preferably, if Fig.10 As shown, in the second preferred example, the depth hi of the first groove is any value between 20um and 40um.

[0078] For example, the depth hi of the first groove may be set to 20 um, 25 um, 30 um, 35 um, or 40 um.

[0079] Preferably, if Fig.10 As shown, in the second preferred example, the depth hs of the second groove is set to any value between 100 um and 120 um.

[0080] For example, the depth hs of the second groove may be set to 100 um, 105 um, 110 um, 115 um, or 120 um.

[0081] Preferably, if Fig.10 As shown, in the second preferred example, the width of the area occupied by the plurality of first grooves is smaller than the width of the area occupied by the plurality of second grooves.

[0082] For example, the total number of first grooves 15 is 7, of which the number of first grooves is 2, the number of second grooves is 5, the total width of the connecting portion 14 is 4.0 mm, the width of the area occupied by the two first grooves is 1.0 mm, the width of the area occupied by the five second grooves is 2.5 mm, and the innermost side of the connecting portion 14 is reserved with a width of 0.5 mm and is not processed.

[0083] It should be noted that, except for the different depths, the widths and groove spacings of the first groove and the second groove are preferably set to be the same.

[0084] Preferably, if Fig. 9 and Fig.10 As shown, the groove spacing d between two adjacent first grooves 15 is set to any value between 30um and 300um.

[0085] For example, the groove spacing d can be set to 30um, 50um, 100um, 150um, 200um, 250um or 300um. The groove spacing d between two adjacent first grooves 15 is further preferably set to any value between 100um and 200um.

[0086] It should be noted that the groove spacing d between the two adjacent first grooves 15 is in the width direction of the first connecting portion 141 ( Fig. 9 , 10 In the left-right direction), the distance between the center lines of two adjacent first grooves 15 is as follows: Fig. 9 , 10 As shown in d.

[0087] Preferably, if Fig. 9 and Fig.10 As shown, the width w of the first groove 15 is preferably any value between 20 um and 200 um.

[0088] Exemplarily, the width w of the first groove 15 can be set to 20um, 50um, 80um, 100um, 120um, 150um, 180um or 200um. Among them, the width w of the first groove 15 is further preferably set to any value between 50um and 120um. By limiting the width of the first groove, it is possible to avoid the reduction in the number of first grooves due to the width of the first groove being too wide, thereby affecting the bonding force between the plastic frame and the connecting part, and to avoid the grooving efficiency and grooving rate due to the width of the first groove being too narrow.

[0089] It should be noted that, in the case where a plurality of first grooves 15 are provided, it is preferred that the widths of the plurality of first grooves 15 be set to be the same.

[0090] Preferably, if Figure 4 As shown, the partition plate 13 of the present invention is provided with a second groove 131 for accommodating the injection molding material at a position corresponding to the first connecting portion 141 and the second connecting portion 142 .

[0091] By providing the second groove 131 on the partition plate 13 , the connection area between the plastic frame 2 and the housing assembly 1 can be increased, thereby improving the connection stability between the plastic frame 2 and the housing assembly 1 .

[0092] It should be noted that, in actual application, those skilled in the art may only set the second groove 131 at the position corresponding to the partition 13 and the first connection part 141, or may only set the second groove 131 at the position corresponding to the partition 13 and the second connection part 142. Such flexible adjustment and change do not deviate from the principle and scope of the utility model and should be limited within the protection scope of the utility model. Of course, the utility model preferably sets the second groove 131 at the position corresponding to the partition 13 and the first connection part 141 and the second connection part 142.

[0093] Preferably, if Figure 4 and Figure 5 As shown, there is a gap 16 between the first connection portion 141 and the partition 13 , and there is also a gap 16 between the second connection portion 142 and the partition 13 .

[0094] By setting a gap between the partition 13 and the first connecting part 141 and between the partition 13 and the second connecting part 142, during the sealing injection molding of the shell assembly 1, the molten plastic will be injected into the gap 16 between the partition 13 and the first connecting part 141 and between the partition 13 and the second connecting part 142, thereby increasing the contact area between the plastic frame 2 and the shell assembly 1, thereby further improving the connection stability between the plastic frame 2 and the shell assembly 1.

[0095] It should be noted that if Figure 5As shown, in actual application, those skilled in the art may only allow the gap 16 to be provided between the partition 13 and the first connection portion 141, or only allow the gap 16 to be provided between the partition 13 and the second connection portion 142. Such flexible adjustment and change do not deviate from the principle and scope of the utility model and should be limited within the protection scope of the utility model. Of course, the utility model preferably allows the gap 16 to be provided between the partition 13 and the first connection portion 141 and between the partition 13 and the second connection portion 142.

[0096] In addition, it should be noted that Figure 4 As shown, when there is a gap 16 between the first connection part 141 and the partition 13, the first groove 15 is provided on the upper surface and the lower surface of the first connection part 141. Similarly, when there is a gap 16 between the second connection part 142 and the partition 13, the first groove 15 is provided on the upper surface and the lower surface of the second connection part 142.

[0097] It should be noted that, in actual applications, those skilled in the art may set the second groove 131 to be cylindrical, square or strip-shaped, etc. Such adjustment and change of the specific shape of the second groove 131 does not deviate from the scope and range of the present invention and should be limited within the protection scope of the present invention.

[0098] In addition, it should be noted that, in actual applications, those skilled in the art may extend the first groove 15 along the length direction of the first connecting portion 141, or extend the first groove 15 along the width direction of the first connecting portion 141, or extend the first groove 15 at an angle, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present utility model and should be limited within the protection scope of the present utility model.

[0099] For example, Figures 6 to 8 As shown, the shell component 1 is a rectangular structure, and the shell component 1 has two long sides and two short sides. Accordingly, the first connection part 141 and the second connection part 142 are both composed of two long side connection parts and two short side connection parts. The first groove 15 on the long side connection part extends along the length direction of the long side connection part (that is, the length direction of the shell component 1), and the first groove 15 on the short side connection part extends along the length direction of the short side connection part (that is, the width direction of the shell component 1).

[0100] Of course, in this first preferred example, Figures 6 to 8 As shown, the first groove 15 is preferably configured to be strip-shaped and extend along the length direction of the first connecting portion 141 , and a plurality of first grooves 15 are distributed at intervals along the width direction of the first connecting portion 141 .

[0101] Those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any one of the claimed embodiments may be used in any combination.

[0102] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, 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 fall within the protection scope of the present invention.

Claims

1. A battery housing, characterized in that: It includes a receiving part and a connecting part arranged on the receiving part. The receiving part is the part in the middle of the battery shell that receives the battery cell, and a cavity for receiving the battery cell is formed inside the receiving part. The surface of the connecting part is provided with a first groove surrounding the receiving part.

2. The battery housing according to claim 1, characterized in that: The first grooves are provided in plurality and are respectively arranged at both end surfaces of the connecting portion in the thickness direction.

3. The battery housing according to claim 1, characterized in that: A plurality of first grooves are provided and are distributed at intervals.

4. The battery case according to claim 3, characterized in that: The first 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.

5. The battery housing according to claim 1, characterized in that: The first groove is in a closed ring shape and surrounds the accommodation portion.

6. The battery housing according to claim 3, characterized in that: The width of the first groove is w, wherein 20um≤w≤200um; and / or, The groove distance between two adjacent first grooves is d, wherein 30um≤d≤300um.

7. A battery, characterized in that: The battery includes a first battery shell, a second battery shell and a plastic frame, the first battery shell and / or the second battery shell is a battery shell as described in any one of claims 1 to 6, the plastic frame is covered on the outer end surface of the connecting part of the first battery shell and the connecting part of the second battery shell, and the plastic frame is partially accommodated in the first groove.

8. The battery according to claim 7, characterized in that The battery further includes a partition disposed between the first battery housing and the second battery housing, and the plastic frame covers the connecting portion of the first battery housing, the edge of the partition, and the outer end surface of the connecting portion of the second battery housing.

9. The battery according to claim 8, characterized in that A gap is provided between the connecting portion of the first battery housing and the edge of the partition, and the plastic frame portion is accommodated in the gap; and / or, A gap is provided between the connecting portion of the second battery housing and the partition, and the plastic frame portion is accommodated in the gap.

10. The battery according to claim 9, characterized in that The edge of the partition is provided with a plurality of second grooves on one end surface, and the plastic frame is partially received in the second grooves.

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